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Diffstat (limited to 'bfd/aoutx.h')
| -rw-r--r-- | bfd/aoutx.h | 5706 |
1 files changed, 5706 insertions, 0 deletions
diff --git a/bfd/aoutx.h b/bfd/aoutx.h new file mode 100644 index 00000000000..2704eecccfe --- /dev/null +++ b/bfd/aoutx.h @@ -0,0 +1,5706 @@ +/* BFD semi-generic back-end for a.out binaries. + Copyright 1990, 91, 92, 93, 94, 95, 96, 97, 1998 + Free Software Foundation, Inc. + Written by Cygnus Support. + +This file is part of BFD, the Binary File Descriptor library. + +This program is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; if not, write to the Free Software +Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + +/* +SECTION + a.out backends + + +DESCRIPTION + + BFD supports a number of different flavours of a.out format, + though the major differences are only the sizes of the + structures on disk, and the shape of the relocation + information. + + The support is split into a basic support file @file{aoutx.h} + and other files which derive functions from the base. One + derivation file is @file{aoutf1.h} (for a.out flavour 1), and + adds to the basic a.out functions support for sun3, sun4, 386 + and 29k a.out files, to create a target jump vector for a + specific target. + + This information is further split out into more specific files + for each machine, including @file{sunos.c} for sun3 and sun4, + @file{newsos3.c} for the Sony NEWS, and @file{demo64.c} for a + demonstration of a 64 bit a.out format. + + The base file @file{aoutx.h} defines general mechanisms for + reading and writing records to and from disk and various + other methods which BFD requires. It is included by + @file{aout32.c} and @file{aout64.c} to form the names + <<aout_32_swap_exec_header_in>>, <<aout_64_swap_exec_header_in>>, etc. + + As an example, this is what goes on to make the back end for a + sun4, from @file{aout32.c}: + +| #define ARCH_SIZE 32 +| #include "aoutx.h" + + Which exports names: + +| ... +| aout_32_canonicalize_reloc +| aout_32_find_nearest_line +| aout_32_get_lineno +| aout_32_get_reloc_upper_bound +| ... + + from @file{sunos.c}: + +| #define TARGET_NAME "a.out-sunos-big" +| #define VECNAME sunos_big_vec +| #include "aoutf1.h" + + requires all the names from @file{aout32.c}, and produces the jump vector + +| sunos_big_vec + + The file @file{host-aout.c} is a special case. It is for a large set + of hosts that use ``more or less standard'' a.out files, and + for which cross-debugging is not interesting. It uses the + standard 32-bit a.out support routines, but determines the + file offsets and addresses of the text, data, and BSS + sections, the machine architecture and machine type, and the + entry point address, in a host-dependent manner. Once these + values have been determined, generic code is used to handle + the object file. + + When porting it to run on a new system, you must supply: + +| HOST_PAGE_SIZE +| HOST_SEGMENT_SIZE +| HOST_MACHINE_ARCH (optional) +| HOST_MACHINE_MACHINE (optional) +| HOST_TEXT_START_ADDR +| HOST_STACK_END_ADDR + + in the file @file{../include/sys/h-@var{XXX}.h} (for your host). These + values, plus the structures and macros defined in @file{a.out.h} on + your host system, will produce a BFD target that will access + ordinary a.out files on your host. To configure a new machine + to use @file{host-aout.c}, specify: + +| TDEFAULTS = -DDEFAULT_VECTOR=host_aout_big_vec +| TDEPFILES= host-aout.o trad-core.o + + in the @file{config/@var{XXX}.mt} file, and modify @file{configure.in} + to use the + @file{@var{XXX}.mt} file (by setting "<<bfd_target=XXX>>") when your + configuration is selected. + +*/ + +/* Some assumptions: + * Any BFD with D_PAGED set is ZMAGIC, and vice versa. + Doesn't matter what the setting of WP_TEXT is on output, but it'll + get set on input. + * Any BFD with D_PAGED clear and WP_TEXT set is NMAGIC. + * Any BFD with both flags clear is OMAGIC. + (Just want to make these explicit, so the conditions tested in this + file make sense if you're more familiar with a.out than with BFD.) */ + +#define KEEPIT udata.i + +#include <ctype.h> +#include "bfd.h" +#include "sysdep.h" +#include "bfdlink.h" + +#include "libaout.h" +#include "libbfd.h" +#include "aout/aout64.h" +#include "aout/stab_gnu.h" +#include "aout/ar.h" + +static boolean aout_get_external_symbols PARAMS ((bfd *)); +static boolean translate_from_native_sym_flags + PARAMS ((bfd *, aout_symbol_type *)); +static boolean translate_to_native_sym_flags + PARAMS ((bfd *, asymbol *, struct external_nlist *)); +static void adjust_o_magic PARAMS ((bfd *, struct internal_exec *)); +static void adjust_z_magic PARAMS ((bfd *, struct internal_exec *)); +static void adjust_n_magic PARAMS ((bfd *, struct internal_exec *)); + +/* +SUBSECTION + Relocations + +DESCRIPTION + The file @file{aoutx.h} provides for both the @emph{standard} + and @emph{extended} forms of a.out relocation records. + + The standard records contain only an + address, a symbol index, and a type field. The extended records + (used on 29ks and sparcs) also have a full integer for an + addend. + +*/ +#ifndef CTOR_TABLE_RELOC_HOWTO +#define CTOR_TABLE_RELOC_IDX 2 +#define CTOR_TABLE_RELOC_HOWTO(BFD) ((obj_reloc_entry_size(BFD) == RELOC_EXT_SIZE \ + ? howto_table_ext : howto_table_std) \ + + CTOR_TABLE_RELOC_IDX) +#endif + +#ifndef MY_swap_std_reloc_in +#define MY_swap_std_reloc_in NAME(aout,swap_std_reloc_in) +#endif + +#ifndef MY_swap_std_reloc_out +#define MY_swap_std_reloc_out NAME(aout,swap_std_reloc_out) +#endif + +#ifndef MY_final_link_relocate +#define MY_final_link_relocate _bfd_final_link_relocate +#endif + +#ifndef MY_relocate_contents +#define MY_relocate_contents _bfd_relocate_contents +#endif + +#define howto_table_ext NAME(aout,ext_howto_table) +#define howto_table_std NAME(aout,std_howto_table) + +reloc_howto_type howto_table_ext[] = +{ + /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone */ + HOWTO(RELOC_8, 0, 0, 8, false, 0, complain_overflow_bitfield,0,"8", false, 0,0x000000ff, false), + HOWTO(RELOC_16, 0, 1, 16, false, 0, complain_overflow_bitfield,0,"16", false, 0,0x0000ffff, false), + HOWTO(RELOC_32, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"32", false, 0,0xffffffff, false), + HOWTO(RELOC_DISP8, 0, 0, 8, true, 0, complain_overflow_signed,0,"DISP8", false, 0,0x000000ff, false), + HOWTO(RELOC_DISP16, 0, 1, 16, true, 0, complain_overflow_signed,0,"DISP16", false, 0,0x0000ffff, false), + HOWTO(RELOC_DISP32, 0, 2, 32, true, 0, complain_overflow_signed,0,"DISP32", false, 0,0xffffffff, false), + HOWTO(RELOC_WDISP30,2, 2, 30, true, 0, complain_overflow_signed,0,"WDISP30", false, 0,0x3fffffff, false), + HOWTO(RELOC_WDISP22,2, 2, 22, true, 0, complain_overflow_signed,0,"WDISP22", false, 0,0x003fffff, false), + HOWTO(RELOC_HI22, 10, 2, 22, false, 0, complain_overflow_bitfield,0,"HI22", false, 0,0x003fffff, false), + HOWTO(RELOC_22, 0, 2, 22, false, 0, complain_overflow_bitfield,0,"22", false, 0,0x003fffff, false), + HOWTO(RELOC_13, 0, 2, 13, false, 0, complain_overflow_bitfield,0,"13", false, 0,0x00001fff, false), + HOWTO(RELOC_LO10, 0, 2, 10, false, 0, complain_overflow_dont,0,"LO10", false, 0,0x000003ff, false), + HOWTO(RELOC_SFA_BASE,0, 2, 32, false, 0, complain_overflow_bitfield,0,"SFA_BASE", false, 0,0xffffffff, false), + HOWTO(RELOC_SFA_OFF13,0,2, 32, false, 0, complain_overflow_bitfield,0,"SFA_OFF13",false, 0,0xffffffff, false), + HOWTO(RELOC_BASE10, 0, 2, 10, false, 0, complain_overflow_dont,0,"BASE10", false, 0,0x000003ff, false), + HOWTO(RELOC_BASE13, 0, 2, 13, false, 0, complain_overflow_signed,0,"BASE13", false, 0,0x00001fff, false), + HOWTO(RELOC_BASE22, 10, 2, 22, false, 0, complain_overflow_bitfield,0,"BASE22", false, 0,0x003fffff, false), + HOWTO(RELOC_PC10, 0, 2, 10, true, 0, complain_overflow_dont,0,"PC10", false, 0,0x000003ff, true), + HOWTO(RELOC_PC22, 10, 2, 22, true, 0, complain_overflow_signed,0,"PC22", false, 0,0x003fffff, true), + HOWTO(RELOC_JMP_TBL,2, 2, 30, true, 0, complain_overflow_signed,0,"JMP_TBL", false, 0,0x3fffffff, false), + HOWTO(RELOC_SEGOFF16,0, 2, 0, false, 0, complain_overflow_bitfield,0,"SEGOFF16", false, 0,0x00000000, false), + HOWTO(RELOC_GLOB_DAT,0, 2, 0, false, 0, complain_overflow_bitfield,0,"GLOB_DAT", false, 0,0x00000000, false), + HOWTO(RELOC_JMP_SLOT,0, 2, 0, false, 0, complain_overflow_bitfield,0,"JMP_SLOT", false, 0,0x00000000, false), + HOWTO(RELOC_RELATIVE,0, 2, 0, false, 0, complain_overflow_bitfield,0,"RELATIVE", false, 0,0x00000000, false), + HOWTO(0, 0, 0, 0, false, 0, complain_overflow_dont, 0, "R_SPARC_NONE", false,0,0x00000000,true), + HOWTO(0, 0, 0, 0, false, 0, complain_overflow_dont, 0, "R_SPARC_NONE", false,0,0x00000000,true), +#define RELOC_SPARC_REV32 RELOC_WDISP19 + HOWTO(RELOC_SPARC_REV32, 0, 2, 32, false, 0, complain_overflow_dont,0,"R_SPARC_REV32", false, 0,0xffffffff, false), +}; + +/* Convert standard reloc records to "arelent" format (incl byte swap). */ + +reloc_howto_type howto_table_std[] = { + /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone */ +HOWTO( 0, 0, 0, 8, false, 0, complain_overflow_bitfield,0,"8", true, 0x000000ff,0x000000ff, false), +HOWTO( 1, 0, 1, 16, false, 0, complain_overflow_bitfield,0,"16", true, 0x0000ffff,0x0000ffff, false), +HOWTO( 2, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"32", true, 0xffffffff,0xffffffff, false), +HOWTO( 3, 0, 4, 64, false, 0, complain_overflow_bitfield,0,"64", true, 0xdeaddead,0xdeaddead, false), +HOWTO( 4, 0, 0, 8, true, 0, complain_overflow_signed, 0,"DISP8", true, 0x000000ff,0x000000ff, false), +HOWTO( 5, 0, 1, 16, true, 0, complain_overflow_signed, 0,"DISP16", true, 0x0000ffff,0x0000ffff, false), +HOWTO( 6, 0, 2, 32, true, 0, complain_overflow_signed, 0,"DISP32", true, 0xffffffff,0xffffffff, false), +HOWTO( 7, 0, 4, 64, true, 0, complain_overflow_signed, 0,"DISP64", true, 0xfeedface,0xfeedface, false), +HOWTO( 8, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"GOT_REL", false, 0,0x00000000, false), +HOWTO( 9, 0, 1, 16, false, 0, complain_overflow_bitfield,0,"BASE16", false,0xffffffff,0xffffffff, false), +HOWTO(10, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"BASE32", false,0xffffffff,0xffffffff, false), +{ -1 }, +{ -1 }, +{ -1 }, +{ -1 }, +{ -1 }, + HOWTO(16, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"JMP_TABLE", false, 0,0x00000000, false), +{ -1 }, +{ -1 }, +{ -1 }, +{ -1 }, +{ -1 }, +{ -1 }, +{ -1 }, +{ -1 }, { -1 }, { -1 }, { -1 }, { -1 }, { -1 }, { -1 }, { -1 }, + HOWTO(32, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"RELATIVE", false, 0,0x00000000, false), +{ -1 }, +{ -1 }, +{ -1 }, +{ -1 }, +{ -1 }, +{ -1 }, +{ -1 }, + HOWTO(40, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"BASEREL", false, 0,0x00000000, false), +}; + +#define TABLE_SIZE(TABLE) (sizeof(TABLE)/sizeof(TABLE[0])) + +reloc_howto_type * +NAME(aout,reloc_type_lookup) (abfd,code) + bfd *abfd; + bfd_reloc_code_real_type code; +{ +#define EXT(i,j) case i: return &howto_table_ext[j] +#define STD(i,j) case i: return &howto_table_std[j] + int ext = obj_reloc_entry_size (abfd) == RELOC_EXT_SIZE; + if (code == BFD_RELOC_CTOR) + switch (bfd_get_arch_info (abfd)->bits_per_address) + { + case 32: + code = BFD_RELOC_32; + break; + case 64: + code = BFD_RELOC_64; + break; + } + if (ext) + switch (code) + { + EXT (BFD_RELOC_32, 2); + EXT (BFD_RELOC_HI22, 8); + EXT (BFD_RELOC_LO10, 11); + EXT (BFD_RELOC_32_PCREL_S2, 6); + EXT (BFD_RELOC_SPARC_WDISP22, 7); + EXT (BFD_RELOC_SPARC13, 10); + EXT (BFD_RELOC_SPARC_GOT10, 14); + EXT (BFD_RELOC_SPARC_BASE13, 15); + EXT (BFD_RELOC_SPARC_GOT13, 15); + EXT (BFD_RELOC_SPARC_GOT22, 16); + EXT (BFD_RELOC_SPARC_PC10, 17); + EXT (BFD_RELOC_SPARC_PC22, 18); + EXT (BFD_RELOC_SPARC_WPLT30, 19); + EXT (BFD_RELOC_SPARC_REV32, 26); + default: return (reloc_howto_type *) NULL; + } + else + /* std relocs */ + switch (code) + { + STD (BFD_RELOC_16, 1); + STD (BFD_RELOC_32, 2); + STD (BFD_RELOC_8_PCREL, 4); + STD (BFD_RELOC_16_PCREL, 5); + STD (BFD_RELOC_32_PCREL, 6); + STD (BFD_RELOC_16_BASEREL, 9); + STD (BFD_RELOC_32_BASEREL, 10); + default: return (reloc_howto_type *) NULL; + } +} + +/* +SUBSECTION + Internal entry points + +DESCRIPTION + @file{aoutx.h} exports several routines for accessing the + contents of an a.out file, which are gathered and exported in + turn by various format specific files (eg sunos.c). + +*/ + +/* +FUNCTION + aout_@var{size}_swap_exec_header_in + +SYNOPSIS + void aout_@var{size}_swap_exec_header_in, + (bfd *abfd, + struct external_exec *raw_bytes, + struct internal_exec *execp); + +DESCRIPTION + Swap the information in an executable header @var{raw_bytes} taken + from a raw byte stream memory image into the internal exec header + structure @var{execp}. +*/ + +#ifndef NAME_swap_exec_header_in +void +NAME(aout,swap_exec_header_in) (abfd, raw_bytes, execp) + bfd *abfd; + struct external_exec *raw_bytes; + struct internal_exec *execp; +{ + struct external_exec *bytes = (struct external_exec *)raw_bytes; + + /* The internal_exec structure has some fields that are unused in this + configuration (IE for i960), so ensure that all such uninitialized + fields are zero'd out. There are places where two of these structs + are memcmp'd, and thus the contents do matter. */ + memset ((PTR) execp, 0, sizeof (struct internal_exec)); + /* Now fill in fields in the execp, from the bytes in the raw data. */ + execp->a_info = bfd_h_get_32 (abfd, bytes->e_info); + execp->a_text = GET_WORD (abfd, bytes->e_text); + execp->a_data = GET_WORD (abfd, bytes->e_data); + execp->a_bss = GET_WORD (abfd, bytes->e_bss); + execp->a_syms = GET_WORD (abfd, bytes->e_syms); + execp->a_entry = GET_WORD (abfd, bytes->e_entry); + execp->a_trsize = GET_WORD (abfd, bytes->e_trsize); + execp->a_drsize = GET_WORD (abfd, bytes->e_drsize); +} +#define NAME_swap_exec_header_in NAME(aout,swap_exec_header_in) +#endif + +/* +FUNCTION + aout_@var{size}_swap_exec_header_out + +SYNOPSIS + void aout_@var{size}_swap_exec_header_out + (bfd *abfd, + struct internal_exec *execp, + struct external_exec *raw_bytes); + +DESCRIPTION + Swap the information in an internal exec header structure + @var{execp} into the buffer @var{raw_bytes} ready for writing to disk. +*/ +void +NAME(aout,swap_exec_header_out) (abfd, execp, raw_bytes) + bfd *abfd; + struct internal_exec *execp; + struct external_exec *raw_bytes; +{ + struct external_exec *bytes = (struct external_exec *)raw_bytes; + + /* Now fill in fields in the raw data, from the fields in the exec struct. */ + bfd_h_put_32 (abfd, execp->a_info , bytes->e_info); + PUT_WORD (abfd, execp->a_text , bytes->e_text); + PUT_WORD (abfd, execp->a_data , bytes->e_data); + PUT_WORD (abfd, execp->a_bss , bytes->e_bss); + PUT_WORD (abfd, execp->a_syms , bytes->e_syms); + PUT_WORD (abfd, execp->a_entry , bytes->e_entry); + PUT_WORD (abfd, execp->a_trsize, bytes->e_trsize); + PUT_WORD (abfd, execp->a_drsize, bytes->e_drsize); +} + +/* Make all the section for an a.out file. */ + +boolean +NAME(aout,make_sections) (abfd) + bfd *abfd; +{ + if (obj_textsec (abfd) == (asection *) NULL + && bfd_make_section (abfd, ".text") == (asection *) NULL) + return false; + if (obj_datasec (abfd) == (asection *) NULL + && bfd_make_section (abfd, ".data") == (asection *) NULL) + return false; + if (obj_bsssec (abfd) == (asection *) NULL + && bfd_make_section (abfd, ".bss") == (asection *) NULL) + return false; + return true; +} + +/* +FUNCTION + aout_@var{size}_some_aout_object_p + +SYNOPSIS + const bfd_target *aout_@var{size}_some_aout_object_p + (bfd *abfd, + const bfd_target *(*callback_to_real_object_p)()); + +DESCRIPTION + Some a.out variant thinks that the file open in @var{abfd} + checking is an a.out file. Do some more checking, and set up + for access if it really is. Call back to the calling + environment's "finish up" function just before returning, to + handle any last-minute setup. +*/ + +const bfd_target * +NAME(aout,some_aout_object_p) (abfd, execp, callback_to_real_object_p) + bfd *abfd; + struct internal_exec *execp; + const bfd_target *(*callback_to_real_object_p) PARAMS ((bfd *)); +{ + struct aout_data_struct *rawptr, *oldrawptr; + const bfd_target *result; + + rawptr = (struct aout_data_struct *) bfd_zalloc (abfd, sizeof (struct aout_data_struct )); + if (rawptr == NULL) + return 0; + + oldrawptr = abfd->tdata.aout_data; + abfd->tdata.aout_data = rawptr; + + /* Copy the contents of the old tdata struct. + In particular, we want the subformat, since for hpux it was set in + hp300hpux.c:swap_exec_header_in and will be used in + hp300hpux.c:callback. */ + if (oldrawptr != NULL) + *abfd->tdata.aout_data = *oldrawptr; + + abfd->tdata.aout_data->a.hdr = &rawptr->e; + *(abfd->tdata.aout_data->a.hdr) = *execp; /* Copy in the internal_exec struct */ + execp = abfd->tdata.aout_data->a.hdr; + + /* Set the file flags */ + abfd->flags = BFD_NO_FLAGS; + if (execp->a_drsize || execp->a_trsize) + abfd->flags |= HAS_RELOC; + /* Setting of EXEC_P has been deferred to the bottom of this function */ + if (execp->a_syms) + abfd->flags |= HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS; + if (N_DYNAMIC(*execp)) + abfd->flags |= DYNAMIC; + + if (N_MAGIC (*execp) == ZMAGIC) + { + abfd->flags |= D_PAGED | WP_TEXT; + adata (abfd).magic = z_magic; + } + else if (N_MAGIC (*execp) == QMAGIC) + { + abfd->flags |= D_PAGED | WP_TEXT; + adata (abfd).magic = z_magic; + adata (abfd).subformat = q_magic_format; + } + else if (N_MAGIC (*execp) == NMAGIC) + { + abfd->flags |= WP_TEXT; + adata (abfd).magic = n_magic; + } + else if (N_MAGIC (*execp) == OMAGIC + || N_MAGIC (*execp) == BMAGIC) + adata (abfd).magic = o_magic; + else + { + /* Should have been checked with N_BADMAG before this routine + was called. */ + abort (); + } + + bfd_get_start_address (abfd) = execp->a_entry; + + obj_aout_symbols (abfd) = (aout_symbol_type *)NULL; + bfd_get_symcount (abfd) = execp->a_syms / sizeof (struct external_nlist); + + /* The default relocation entry size is that of traditional V7 Unix. */ + obj_reloc_entry_size (abfd) = RELOC_STD_SIZE; + + /* The default symbol entry size is that of traditional Unix. */ + obj_symbol_entry_size (abfd) = EXTERNAL_NLIST_SIZE; + +#ifdef USE_MMAP + bfd_init_window (&obj_aout_sym_window (abfd)); + bfd_init_window (&obj_aout_string_window (abfd)); +#endif + obj_aout_external_syms (abfd) = NULL; + obj_aout_external_strings (abfd) = NULL; + obj_aout_sym_hashes (abfd) = NULL; + + if (! NAME(aout,make_sections) (abfd)) + return NULL; + + obj_datasec (abfd)->_raw_size = execp->a_data; + obj_bsssec (abfd)->_raw_size = execp->a_bss; + + obj_textsec (abfd)->flags = + (execp->a_trsize != 0 + ? (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_RELOC) + : (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)); + obj_datasec (abfd)->flags = + (execp->a_drsize != 0 + ? (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS | SEC_RELOC) + : (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS)); + obj_bsssec (abfd)->flags = SEC_ALLOC; + +#ifdef THIS_IS_ONLY_DOCUMENTATION + /* The common code can't fill in these things because they depend + on either the start address of the text segment, the rounding + up of virtual addresses between segments, or the starting file + position of the text segment -- all of which varies among different + versions of a.out. */ + + /* Call back to the format-dependent code to fill in the rest of the + fields and do any further cleanup. Things that should be filled + in by the callback: */ + + struct exec *execp = exec_hdr (abfd); + + obj_textsec (abfd)->size = N_TXTSIZE(*execp); + obj_textsec (abfd)->raw_size = N_TXTSIZE(*execp); + /* data and bss are already filled in since they're so standard */ + + /* The virtual memory addresses of the sections */ + obj_textsec (abfd)->vma = N_TXTADDR(*execp); + obj_datasec (abfd)->vma = N_DATADDR(*execp); + obj_bsssec (abfd)->vma = N_BSSADDR(*execp); + + /* The file offsets of the sections */ + obj_textsec (abfd)->filepos = N_TXTOFF(*execp); + obj_datasec (abfd)->filepos = N_DATOFF(*execp); + + /* The file offsets of the relocation info */ + obj_textsec (abfd)->rel_filepos = N_TRELOFF(*execp); + obj_datasec (abfd)->rel_filepos = N_DRELOFF(*execp); + + /* The file offsets of the string table and symbol table. */ + obj_str_filepos (abfd) = N_STROFF (*execp); + obj_sym_filepos (abfd) = N_SYMOFF (*execp); + + /* Determine the architecture and machine type of the object file. */ + switch (N_MACHTYPE (*exec_hdr (abfd))) { + default: + abfd->obj_arch = bfd_arch_obscure; + break; + } + + adata(abfd)->page_size = TARGET_PAGE_SIZE; + adata(abfd)->segment_size = SEGMENT_SIZE; + adata(abfd)->exec_bytes_size = EXEC_BYTES_SIZE; + + return abfd->xvec; + + /* The architecture is encoded in various ways in various a.out variants, + or is not encoded at all in some of them. The relocation size depends + on the architecture and the a.out variant. Finally, the return value + is the bfd_target vector in use. If an error occurs, return zero and + set bfd_error to the appropriate error code. + + Formats such as b.out, which have additional fields in the a.out + header, should cope with them in this callback as well. */ +#endif /* DOCUMENTATION */ + + result = (*callback_to_real_object_p)(abfd); + + /* Now that the segment addresses have been worked out, take a better + guess at whether the file is executable. If the entry point + is within the text segment, assume it is. (This makes files + executable even if their entry point address is 0, as long as + their text starts at zero.). + + This test had to be changed to deal with systems where the text segment + runs at a different location than the default. The problem is that the + entry address can appear to be outside the text segment, thus causing an + erroneous conclusion that the file isn't executable. + + To fix this, we now accept any non-zero entry point as an indication of + executability. This will work most of the time, since only the linker + sets the entry point, and that is likely to be non-zero for most systems. */ + + if (execp->a_entry != 0 + || (execp->a_entry >= obj_textsec(abfd)->vma + && execp->a_entry < obj_textsec(abfd)->vma + obj_textsec(abfd)->_raw_size)) + abfd->flags |= EXEC_P; +#ifdef STAT_FOR_EXEC + else + { + struct stat stat_buf; + + /* The original heuristic doesn't work in some important cases. + The a.out file has no information about the text start + address. For files (like kernels) linked to non-standard + addresses (ld -Ttext nnn) the entry point may not be between + the default text start (obj_textsec(abfd)->vma) and + (obj_textsec(abfd)->vma) + text size. This is not just a mach + issue. Many kernels are loaded at non standard addresses. */ + if (abfd->iostream != NULL + && (abfd->flags & BFD_IN_MEMORY) == 0 + && (fstat(fileno((FILE *) (abfd->iostream)), &stat_buf) == 0) + && ((stat_buf.st_mode & 0111) != 0)) + abfd->flags |= EXEC_P; + } +#endif /* STAT_FOR_EXEC */ + + if (result) + { +#if 0 /* These should be set correctly anyways. */ + abfd->sections = obj_textsec (abfd); + obj_textsec (abfd)->next = obj_datasec (abfd); + obj_datasec (abfd)->next = obj_bsssec (abfd); +#endif + } + else + { + free (rawptr); + abfd->tdata.aout_data = oldrawptr; + } + return result; +} + +/* +FUNCTION + aout_@var{size}_mkobject + +SYNOPSIS + boolean aout_@var{size}_mkobject, (bfd *abfd); + +DESCRIPTION + Initialize BFD @var{abfd} for use with a.out files. +*/ + +boolean +NAME(aout,mkobject) (abfd) + bfd *abfd; +{ + struct aout_data_struct *rawptr; + + bfd_set_error (bfd_error_system_call); + + /* Use an intermediate variable for clarity */ + rawptr = (struct aout_data_struct *)bfd_zalloc (abfd, sizeof (struct aout_data_struct )); + + if (rawptr == NULL) + return false; + + abfd->tdata.aout_data = rawptr; + exec_hdr (abfd) = &(rawptr->e); + + obj_textsec (abfd) = (asection *)NULL; + obj_datasec (abfd) = (asection *)NULL; + obj_bsssec (abfd) = (asection *)NULL; + + return true; +} + + +/* +FUNCTION + aout_@var{size}_machine_type + +SYNOPSIS + enum machine_type aout_@var{size}_machine_type + (enum bfd_architecture arch, + unsigned long machine)); + +DESCRIPTION + Keep track of machine architecture and machine type for + a.out's. Return the <<machine_type>> for a particular + architecture and machine, or <<M_UNKNOWN>> if that exact architecture + and machine can't be represented in a.out format. + + If the architecture is understood, machine type 0 (default) + is always understood. +*/ + +enum machine_type +NAME(aout,machine_type) (arch, machine, unknown) + enum bfd_architecture arch; + unsigned long machine; + boolean *unknown; +{ + enum machine_type arch_flags; + + arch_flags = M_UNKNOWN; + *unknown = true; + + switch (arch) { + case bfd_arch_sparc: + if (machine == 0 + || machine == bfd_mach_sparc + || machine == bfd_mach_sparc_sparclite + || machine == bfd_mach_sparc_sparclite_le + || machine == bfd_mach_sparc_v9) + arch_flags = M_SPARC; + else if (machine == bfd_mach_sparc_sparclet) + arch_flags = M_SPARCLET; + break; + + case bfd_arch_m68k: + switch (machine) { + case 0: arch_flags = M_68010; break; + case bfd_mach_m68000: arch_flags = M_UNKNOWN; *unknown = false; break; + case bfd_mach_m68010: arch_flags = M_68010; break; + case bfd_mach_m68020: arch_flags = M_68020; break; + default: arch_flags = M_UNKNOWN; break; + } + break; + + case bfd_arch_i386: + if (machine == 0) arch_flags = M_386; + break; + + case bfd_arch_a29k: + if (machine == 0) arch_flags = M_29K; + break; + + case bfd_arch_arm: + if (machine == 0) arch_flags = M_ARM; + break; + + case bfd_arch_mips: + switch (machine) { + case 0: + case bfd_mach_mips3000: + case bfd_mach_mips3900: + arch_flags = M_MIPS1; + break; + case bfd_mach_mips6000: + arch_flags = M_MIPS2; + break; + case bfd_mach_mips4000: + case bfd_mach_mips4010: + case bfd_mach_mips4100: + case bfd_mach_mips4300: + case bfd_mach_mips4400: + case bfd_mach_mips4600: + case bfd_mach_mips4650: + case bfd_mach_mips8000: + case bfd_mach_mips10000: + case bfd_mach_mips16: + /* FIXME: These should be MIPS3 or MIPS4. */ + arch_flags = M_MIPS2; + break; + default: + arch_flags = M_UNKNOWN; + break; + } + break; + + case bfd_arch_ns32k: + switch (machine) { + case 0: arch_flags = M_NS32532; break; + case 32032: arch_flags = M_NS32032; break; + case 32532: arch_flags = M_NS32532; break; + default: arch_flags = M_UNKNOWN; break; + } + break; + + case bfd_arch_vax: + *unknown = false; + break; + + default: + arch_flags = M_UNKNOWN; + } + + if (arch_flags != M_UNKNOWN) + *unknown = false; + + return arch_flags; +} + + +/* +FUNCTION + aout_@var{size}_set_arch_mach + +SYNOPSIS + boolean aout_@var{size}_set_arch_mach, + (bfd *, + enum bfd_architecture arch, + unsigned long machine)); + +DESCRIPTION + Set the architecture and the machine of the BFD @var{abfd} to the + values @var{arch} and @var{machine}. Verify that @var{abfd}'s format + can support the architecture required. +*/ + +boolean +NAME(aout,set_arch_mach) (abfd, arch, machine) + bfd *abfd; + enum bfd_architecture arch; + unsigned long machine; +{ + if (! bfd_default_set_arch_mach (abfd, arch, machine)) + return false; + + if (arch != bfd_arch_unknown) + { + boolean unknown; + + NAME(aout,machine_type) (arch, machine, &unknown); + if (unknown) + return false; + } + + /* Determine the size of a relocation entry */ + switch (arch) { + case bfd_arch_sparc: + case bfd_arch_a29k: + case bfd_arch_mips: + obj_reloc_entry_size (abfd) = RELOC_EXT_SIZE; + break; + default: + obj_reloc_entry_size (abfd) = RELOC_STD_SIZE; + break; + } + + return (*aout_backend_info(abfd)->set_sizes) (abfd); +} + +static void +adjust_o_magic (abfd, execp) + bfd *abfd; + struct internal_exec *execp; +{ + file_ptr pos = adata (abfd).exec_bytes_size; + bfd_vma vma = 0; + int pad = 0; + + /* Text. */ + obj_textsec(abfd)->filepos = pos; + if (!obj_textsec(abfd)->user_set_vma) + obj_textsec(abfd)->vma = vma; + else + vma = obj_textsec(abfd)->vma; + + pos += obj_textsec(abfd)->_raw_size; + vma += obj_textsec(abfd)->_raw_size; + + /* Data. */ + if (!obj_datasec(abfd)->user_set_vma) + { +#if 0 /* ?? Does alignment in the file image really matter? */ + pad = align_power (vma, obj_datasec(abfd)->alignment_power) - vma; +#endif + obj_textsec(abfd)->_raw_size += pad; + pos += pad; + vma += pad; + obj_datasec(abfd)->vma = vma; + } + else + vma = obj_datasec(abfd)->vma; + obj_datasec(abfd)->filepos = pos; + pos += obj_datasec(abfd)->_raw_size; + vma += obj_datasec(abfd)->_raw_size; + + /* BSS. */ + if (!obj_bsssec(abfd)->user_set_vma) + { +#if 0 + pad = align_power (vma, obj_bsssec(abfd)->alignment_power) - vma; +#endif + obj_datasec(abfd)->_raw_size += pad; + pos += pad; + vma += pad; + obj_bsssec(abfd)->vma = vma; + } + else + { + /* The VMA of the .bss section is set by the the VMA of the + .data section plus the size of the .data section. We may + need to add padding bytes to make this true. */ + pad = obj_bsssec (abfd)->vma - vma; + if (pad > 0) + { + obj_datasec (abfd)->_raw_size += pad; + pos += pad; + } + } + obj_bsssec(abfd)->filepos = pos; + + /* Fix up the exec header. */ + execp->a_text = obj_textsec(abfd)->_raw_size; + execp->a_data = obj_datasec(abfd)->_raw_size; + execp->a_bss = obj_bsssec(abfd)->_raw_size; + N_SET_MAGIC (*execp, OMAGIC); +} + +static void +adjust_z_magic (abfd, execp) + bfd *abfd; + struct internal_exec *execp; +{ + bfd_size_type data_pad, text_pad; + file_ptr text_end; + CONST struct aout_backend_data *abdp; + int ztih; /* Nonzero if text includes exec header. */ + + abdp = aout_backend_info (abfd); + + /* Text. */ + ztih = (abdp != NULL + && (abdp->text_includes_header + || obj_aout_subformat (abfd) == q_magic_format)); + obj_textsec(abfd)->filepos = (ztih + ? adata(abfd).exec_bytes_size + : adata(abfd).zmagic_disk_block_size); + if (! obj_textsec(abfd)->user_set_vma) + { + /* ?? Do we really need to check for relocs here? */ + obj_textsec(abfd)->vma = ((abfd->flags & HAS_RELOC) + ? 0 + : (ztih + ? (abdp->default_text_vma + + adata(abfd).exec_bytes_size) + : abdp->default_text_vma)); + text_pad = 0; + } + else + { + /* The .text section is being loaded at an unusual address. We + may need to pad it such that the .data section starts at a page + boundary. */ + if (ztih) + text_pad = ((obj_textsec (abfd)->filepos - obj_textsec (abfd)->vma) + & (adata (abfd).page_size - 1)); + else + text_pad = ((- obj_textsec (abfd)->vma) + & (adata (abfd).page_size - 1)); + } + + /* Find start of data. */ + if (ztih) + { + text_end = obj_textsec (abfd)->filepos + obj_textsec (abfd)->_raw_size; + text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end; + } + else + { + /* Note that if page_size == zmagic_disk_block_size, then + filepos == page_size, and this case is the same as the ztih + case. */ + text_end = obj_textsec (abfd)->_raw_size; + text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end; + text_end += obj_textsec (abfd)->filepos; + } + obj_textsec(abfd)->_raw_size += text_pad; + text_end += text_pad; + + /* Data. */ + if (!obj_datasec(abfd)->user_set_vma) + { + bfd_vma vma; + vma = obj_textsec(abfd)->vma + obj_textsec(abfd)->_raw_size; + obj_datasec(abfd)->vma = BFD_ALIGN (vma, adata(abfd).segment_size); + } + if (abdp && abdp->zmagic_mapped_contiguous) + { + text_pad = (obj_datasec(abfd)->vma + - obj_textsec(abfd)->vma + - obj_textsec(abfd)->_raw_size); + obj_textsec(abfd)->_raw_size += text_pad; + } + obj_datasec(abfd)->filepos = (obj_textsec(abfd)->filepos + + obj_textsec(abfd)->_raw_size); + + /* Fix up exec header while we're at it. */ + execp->a_text = obj_textsec(abfd)->_raw_size; + if (ztih && (!abdp || (abdp && !abdp->exec_header_not_counted))) + execp->a_text += adata(abfd).exec_bytes_size; + if (obj_aout_subformat (abfd) == q_magic_format) + N_SET_MAGIC (*execp, QMAGIC); + else + N_SET_MAGIC (*execp, ZMAGIC); + + /* Spec says data section should be rounded up to page boundary. */ + obj_datasec(abfd)->_raw_size + = align_power (obj_datasec(abfd)->_raw_size, + obj_bsssec(abfd)->alignment_power); + execp->a_data = BFD_ALIGN (obj_datasec(abfd)->_raw_size, + adata(abfd).page_size); + data_pad = execp->a_data - obj_datasec(abfd)->_raw_size; + + /* BSS. */ + if (!obj_bsssec(abfd)->user_set_vma) + obj_bsssec(abfd)->vma = (obj_datasec(abfd)->vma + + obj_datasec(abfd)->_raw_size); + /* If the BSS immediately follows the data section and extra space + in the page is left after the data section, fudge data + in the header so that the bss section looks smaller by that + amount. We'll start the bss section there, and lie to the OS. + (Note that a linker script, as well as the above assignment, + could have explicitly set the BSS vma to immediately follow + the data section.) */ + if (align_power (obj_bsssec(abfd)->vma, obj_bsssec(abfd)->alignment_power) + == obj_datasec(abfd)->vma + obj_datasec(abfd)->_raw_size) + execp->a_bss = (data_pad > obj_bsssec(abfd)->_raw_size) ? 0 : + obj_bsssec(abfd)->_raw_size - data_pad; + else + execp->a_bss = obj_bsssec(abfd)->_raw_size; +} + +static void +adjust_n_magic (abfd, execp) + bfd *abfd; + struct internal_exec *execp; +{ + file_ptr pos = adata(abfd).exec_bytes_size; + bfd_vma vma = 0; + int pad; + + /* Text. */ + obj_textsec(abfd)->filepos = pos; + if (!obj_textsec(abfd)->user_set_vma) + obj_textsec(abfd)->vma = vma; + else + vma = obj_textsec(abfd)->vma; + pos += obj_textsec(abfd)->_raw_size; + vma += obj_textsec(abfd)->_raw_size; + + /* Data. */ + obj_datasec(abfd)->filepos = pos; + if (!obj_datasec(abfd)->user_set_vma) + obj_datasec(abfd)->vma = BFD_ALIGN (vma, adata(abfd).segment_size); + vma = obj_datasec(abfd)->vma; + + /* Since BSS follows data immediately, see if it needs alignment. */ + vma += obj_datasec(abfd)->_raw_size; + pad = align_power (vma, obj_bsssec(abfd)->alignment_power) - vma; + obj_datasec(abfd)->_raw_size += pad; + pos += obj_datasec(abfd)->_raw_size; + + /* BSS. */ + if (!obj_bsssec(abfd)->user_set_vma) + obj_bsssec(abfd)->vma = vma; + else + vma = obj_bsssec(abfd)->vma; + + /* Fix up exec header. */ + execp->a_text = obj_textsec(abfd)->_raw_size; + execp->a_data = obj_datasec(abfd)->_raw_size; + execp->a_bss = obj_bsssec(abfd)->_raw_size; + N_SET_MAGIC (*execp, NMAGIC); +} + +boolean +NAME(aout,adjust_sizes_and_vmas) (abfd, text_size, text_end) + bfd *abfd; + bfd_size_type *text_size; + file_ptr *text_end; +{ + struct internal_exec *execp = exec_hdr (abfd); + + if (! NAME(aout,make_sections) (abfd)) + return false; + + if (adata(abfd).magic != undecided_magic) + return true; + + obj_textsec(abfd)->_raw_size = + align_power(obj_textsec(abfd)->_raw_size, + obj_textsec(abfd)->alignment_power); + + *text_size = obj_textsec (abfd)->_raw_size; + /* Rule (heuristic) for when to pad to a new page. Note that there + are (at least) two ways demand-paged (ZMAGIC) files have been + handled. Most Berkeley-based systems start the text segment at + (TARGET_PAGE_SIZE). However, newer versions of SUNOS start the text + segment right after the exec header; the latter is counted in the + text segment size, and is paged in by the kernel with the rest of + the text. */ + + /* This perhaps isn't the right way to do this, but made it simpler for me + to understand enough to implement it. Better would probably be to go + right from BFD flags to alignment/positioning characteristics. But the + old code was sloppy enough about handling the flags, and had enough + other magic, that it was a little hard for me to understand. I think + I understand it better now, but I haven't time to do the cleanup this + minute. */ + + if (abfd->flags & D_PAGED) + /* Whether or not WP_TEXT is set -- let D_PAGED override. */ + adata(abfd).magic = z_magic; + else if (abfd->flags & WP_TEXT) + adata(abfd).magic = n_magic; + else + adata(abfd).magic = o_magic; + +#ifdef BFD_AOUT_DEBUG /* requires gcc2 */ +#if __GNUC__ >= 2 + fprintf (stderr, "%s text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x,%x>\n", + ({ char *str; + switch (adata(abfd).magic) { + case n_magic: str = "NMAGIC"; break; + case o_magic: str = "OMAGIC"; break; + case z_magic: str = "ZMAGIC"; break; + default: abort (); + } + str; + }), + obj_textsec(abfd)->vma, obj_textsec(abfd)->_raw_size, + obj_textsec(abfd)->alignment_power, + obj_datasec(abfd)->vma, obj_datasec(abfd)->_raw_size, + obj_datasec(abfd)->alignment_power, + obj_bsssec(abfd)->vma, obj_bsssec(abfd)->_raw_size, + obj_bsssec(abfd)->alignment_power); +#endif +#endif + + switch (adata(abfd).magic) + { + case o_magic: + adjust_o_magic (abfd, execp); + break; + case z_magic: + adjust_z_magic (abfd, execp); + break; + case n_magic: + adjust_n_magic (abfd, execp); + break; + default: + abort (); + } + +#ifdef BFD_AOUT_DEBUG + fprintf (stderr, " text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x>\n", + obj_textsec(abfd)->vma, obj_textsec(abfd)->_raw_size, + obj_textsec(abfd)->filepos, + obj_datasec(abfd)->vma, obj_datasec(abfd)->_raw_size, + obj_datasec(abfd)->filepos, + obj_bsssec(abfd)->vma, obj_bsssec(abfd)->_raw_size); +#endif + + return true; +} + +/* +FUNCTION + aout_@var{size}_new_section_hook + +SYNOPSIS + boolean aout_@var{size}_new_section_hook, + (bfd *abfd, + asection *newsect)); + +DESCRIPTION + Called by the BFD in response to a @code{bfd_make_section} + request. +*/ +boolean +NAME(aout,new_section_hook) (abfd, newsect) + bfd *abfd; + asection *newsect; +{ + /* align to double at least */ + newsect->alignment_power = bfd_get_arch_info(abfd)->section_align_power; + + + if (bfd_get_format (abfd) == bfd_object) + { + if (obj_textsec(abfd) == NULL && !strcmp(newsect->name, ".text")) { + obj_textsec(abfd)= newsect; + newsect->target_index = N_TEXT; + return true; + } + + if (obj_datasec(abfd) == NULL && !strcmp(newsect->name, ".data")) { + obj_datasec(abfd) = newsect; + newsect->target_index = N_DATA; + return true; + } + + if (obj_bsssec(abfd) == NULL && !strcmp(newsect->name, ".bss")) { + obj_bsssec(abfd) = newsect; + newsect->target_index = N_BSS; + return true; + } + + } + + /* We allow more than three sections internally */ + return true; +} + +boolean +NAME(aout,set_section_contents) (abfd, section, location, offset, count) + bfd *abfd; + sec_ptr section; + PTR location; + file_ptr offset; + bfd_size_type count; +{ + file_ptr text_end; + bfd_size_type text_size; + + if (! abfd->output_has_begun) + { + if (! NAME(aout,adjust_sizes_and_vmas) (abfd, &text_size, &text_end)) + return false; + } + + if (section == obj_bsssec (abfd)) + { + bfd_set_error (bfd_error_no_contents); + return false; + } + + if (section != obj_textsec (abfd) + && section != obj_datasec (abfd)) + { + (*_bfd_error_handler) + (_("%s: can not represent section `%s' in a.out object file format"), + bfd_get_filename (abfd), bfd_get_section_name (abfd, section)); + bfd_set_error (bfd_error_nonrepresentable_section); + return false; + } + + if (count != 0) + { + if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0 + || bfd_write (location, 1, count, abfd) != count) + return false; + } + + return true; +} + +/* Read the external symbols from an a.out file. */ + +static boolean +aout_get_external_symbols (abfd) + bfd *abfd; +{ + if (obj_aout_external_syms (abfd) == (struct external_nlist *) NULL) + { + bfd_size_type count; + struct external_nlist *syms; + + count = exec_hdr (abfd)->a_syms / EXTERNAL_NLIST_SIZE; + +#ifdef USE_MMAP + if (bfd_get_file_window (abfd, + obj_sym_filepos (abfd), exec_hdr (abfd)->a_syms, + &obj_aout_sym_window (abfd), true) == false) + return false; + syms = (struct external_nlist *) obj_aout_sym_window (abfd).data; +#else + /* We allocate using malloc to make the values easy to free + later on. If we put them on the objalloc it might not be + possible to free them. */ + syms = ((struct external_nlist *) + bfd_malloc ((size_t) count * EXTERNAL_NLIST_SIZE)); + if (syms == (struct external_nlist *) NULL && count != 0) + return false; + + if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0 + || (bfd_read (syms, 1, exec_hdr (abfd)->a_syms, abfd) + != exec_hdr (abfd)->a_syms)) + { + free (syms); + return false; + } +#endif + + obj_aout_external_syms (abfd) = syms; + obj_aout_external_sym_count (abfd) = count; + } + + if (obj_aout_external_strings (abfd) == NULL + && exec_hdr (abfd)->a_syms != 0) + { + unsigned char string_chars[BYTES_IN_WORD]; + bfd_size_type stringsize; + char *strings; + + /* Get the size of the strings. */ + if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0 + || (bfd_read ((PTR) string_chars, BYTES_IN_WORD, 1, abfd) + != BYTES_IN_WORD)) + return false; + stringsize = GET_WORD (abfd, string_chars); + +#ifdef USE_MMAP + if (bfd_get_file_window (abfd, obj_str_filepos (abfd), stringsize, + &obj_aout_string_window (abfd), true) == false) + return false; + strings = (char *) obj_aout_string_window (abfd).data; +#else + strings = (char *) bfd_malloc ((size_t) stringsize + 1); + if (strings == NULL) + return false; + + /* Skip space for the string count in the buffer for convenience + when using indexes. */ + if (bfd_read (strings + BYTES_IN_WORD, 1, stringsize - BYTES_IN_WORD, + abfd) + != stringsize - BYTES_IN_WORD) + { + free (strings); + return false; + } +#endif + + /* Ensure that a zero index yields an empty string. */ + strings[0] = '\0'; + + strings[stringsize - 1] = 0; + + obj_aout_external_strings (abfd) = strings; + obj_aout_external_string_size (abfd) = stringsize; + } + + return true; +} + +/* Translate an a.out symbol into a BFD symbol. The desc, other, type + and symbol->value fields of CACHE_PTR will be set from the a.out + nlist structure. This function is responsible for setting + symbol->flags and symbol->section, and adjusting symbol->value. */ + +static boolean +translate_from_native_sym_flags (abfd, cache_ptr) + bfd *abfd; + aout_symbol_type *cache_ptr; +{ + flagword visible; + + if ((cache_ptr->type & N_STAB) != 0 + || cache_ptr->type == N_FN) + { + asection *sec; + + /* This is a debugging symbol. */ + + cache_ptr->symbol.flags = BSF_DEBUGGING; + + /* Work out the symbol section. */ + switch (cache_ptr->type & N_TYPE) + { + case N_TEXT: + case N_FN: + sec = obj_textsec (abfd); + break; + case N_DATA: + sec = obj_datasec (abfd); + break; + case N_BSS: + sec = obj_bsssec (abfd); + break; + default: + case N_ABS: + sec = bfd_abs_section_ptr; + break; + } + + cache_ptr->symbol.section = sec; + cache_ptr->symbol.value -= sec->vma; + + return true; + } + + /* Get the default visibility. This does not apply to all types, so + we just hold it in a local variable to use if wanted. */ + if ((cache_ptr->type & N_EXT) == 0) + visible = BSF_LOCAL; + else + visible = BSF_GLOBAL; + + switch (cache_ptr->type) + { + default: + case N_ABS: case N_ABS | N_EXT: + cache_ptr->symbol.section = bfd_abs_section_ptr; + cache_ptr->symbol.flags = visible; + break; + + case N_UNDF | N_EXT: + if (cache_ptr->symbol.value != 0) + { + /* This is a common symbol. */ + cache_ptr->symbol.flags = BSF_GLOBAL; + cache_ptr->symbol.section = bfd_com_section_ptr; + } + else + { + cache_ptr->symbol.flags = 0; + cache_ptr->symbol.section = bfd_und_section_ptr; + } + break; + + case N_TEXT: case N_TEXT | N_EXT: + cache_ptr->symbol.section = obj_textsec (abfd); + cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; + cache_ptr->symbol.flags = visible; + break; + + /* N_SETV symbols used to represent set vectors placed in the + data section. They are no longer generated. Theoretically, + it was possible to extract the entries and combine them with + new ones, although I don't know if that was ever actually + done. Unless that feature is restored, treat them as data + symbols. */ + case N_SETV: case N_SETV | N_EXT: + case N_DATA: case N_DATA | N_EXT: + cache_ptr->symbol.section = obj_datasec (abfd); + cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; + cache_ptr->symbol.flags = visible; + break; + + case N_BSS: case N_BSS | N_EXT: + cache_ptr->symbol.section = obj_bsssec (abfd); + cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; + cache_ptr->symbol.flags = visible; + break; + + case N_SETA: case N_SETA | N_EXT: + case N_SETT: case N_SETT | N_EXT: + case N_SETD: case N_SETD | N_EXT: + case N_SETB: case N_SETB | N_EXT: + { + /* This code is no longer needed. It used to be used to make + the linker handle set symbols, but they are now handled in + the add_symbols routine instead. */ +#if 0 + asection *section; + arelent_chain *reloc; + asection *into_section; + + /* This is a set symbol. The name of the symbol is the name + of the set (e.g., __CTOR_LIST__). The value of the symbol + is the value to add to the set. We create a section with + the same name as the symbol, and add a reloc to insert the + appropriate value into the section. + + This action is actually obsolete; it used to make the + linker do the right thing, but the linker no longer uses + this function. */ + + section = bfd_get_section_by_name (abfd, cache_ptr->symbol.name); + if (section == NULL) + { + char *copy; + + copy = bfd_alloc (abfd, strlen (cache_ptr->symbol.name) + 1); + if (copy == NULL) + return false; + + strcpy (copy, cache_ptr->symbol.name); + section = bfd_make_section (abfd, copy); + if (section == NULL) + return false; + } + + reloc = (arelent_chain *) bfd_alloc (abfd, sizeof (arelent_chain)); + if (reloc == NULL) + return false; + + /* Build a relocation entry for the constructor. */ + switch (cache_ptr->type & N_TYPE) + { + case N_SETA: + into_section = bfd_abs_section_ptr; + cache_ptr->type = N_ABS; + break; + case N_SETT: + into_section = obj_textsec (abfd); + cache_ptr->type = N_TEXT; + break; + case N_SETD: + into_section = obj_datasec (abfd); + cache_ptr->type = N_DATA; + break; + case N_SETB: + into_section = obj_bsssec (abfd); + cache_ptr->type = N_BSS; + break; + } + + /* Build a relocation pointing into the constructor section + pointing at the symbol in the set vector specified. */ + reloc->relent.addend = cache_ptr->symbol.value; + cache_ptr->symbol.section = into_section; + reloc->relent.sym_ptr_ptr = into_section->symbol_ptr_ptr; + + /* We modify the symbol to belong to a section depending upon + the name of the symbol, and add to the size of the section + to contain a pointer to the symbol. Build a reloc entry to + relocate to this symbol attached to this section. */ + section->flags = SEC_CONSTRUCTOR | SEC_RELOC; + + section->reloc_count++; + section->alignment_power = 2; + + reloc->next = section->constructor_chain; + section->constructor_chain = reloc; + reloc->relent.address = section->_raw_size; + section->_raw_size += BYTES_IN_WORD; + + reloc->relent.howto = CTOR_TABLE_RELOC_HOWTO(abfd); + +#endif /* 0 */ + + switch (cache_ptr->type & N_TYPE) + { + case N_SETA: + cache_ptr->symbol.section = bfd_abs_section_ptr; + break; + case N_SETT: + cache_ptr->symbol.section = obj_textsec (abfd); + break; + case N_SETD: + cache_ptr->symbol.section = obj_datasec (abfd); + break; + case N_SETB: + cache_ptr->symbol.section = obj_bsssec (abfd); + break; + } + + cache_ptr->symbol.flags |= BSF_CONSTRUCTOR; + } + break; + + case N_WARNING: + /* This symbol is the text of a warning message. The next + symbol is the symbol to associate the warning with. If a + reference is made to that symbol, a warning is issued. */ + cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_WARNING; + cache_ptr->symbol.section = bfd_abs_section_ptr; + break; + + case N_INDR: case N_INDR | N_EXT: + /* An indirect symbol. This consists of two symbols in a row. + The first symbol is the name of the indirection. The second + symbol is the name of the target. A reference to the first + symbol becomes a reference to the second. */ + cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_INDIRECT | visible; + cache_ptr->symbol.section = bfd_ind_section_ptr; + break; + + case N_WEAKU: + cache_ptr->symbol.section = bfd_und_section_ptr; + cache_ptr->symbol.flags = BSF_WEAK; + break; + + case N_WEAKA: + cache_ptr->symbol.section = bfd_abs_section_ptr; + cache_ptr->symbol.flags = BSF_WEAK; + break; + + case N_WEAKT: + cache_ptr->symbol.section = obj_textsec (abfd); + cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; + cache_ptr->symbol.flags = BSF_WEAK; + break; + + case N_WEAKD: + cache_ptr->symbol.section = obj_datasec (abfd); + cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; + cache_ptr->symbol.flags = BSF_WEAK; + break; + + case N_WEAKB: + cache_ptr->symbol.section = obj_bsssec (abfd); + cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; + cache_ptr->symbol.flags = BSF_WEAK; + break; + } + + return true; +} + +/* Set the fields of SYM_POINTER according to CACHE_PTR. */ + +static boolean +translate_to_native_sym_flags (abfd, cache_ptr, sym_pointer) + bfd *abfd; + asymbol *cache_ptr; + struct external_nlist *sym_pointer; +{ + bfd_vma value = cache_ptr->value; + asection *sec; + bfd_vma off; + + /* Mask out any existing type bits in case copying from one section + to another. */ + sym_pointer->e_type[0] &= ~N_TYPE; + + sec = bfd_get_section (cache_ptr); + off = 0; + + if (sec == NULL) + { + /* This case occurs, e.g., for the *DEBUG* section of a COFF + file. */ + (*_bfd_error_handler) + (_("%s: can not represent section for symbol `%s' in a.out object file format"), + bfd_get_filename (abfd), + cache_ptr->name != NULL ? cache_ptr->name : _("*unknown*")); + bfd_set_error (bfd_error_nonrepresentable_section); + return false; + } + + if (sec->output_section != NULL) + { + off = sec->output_offset; + sec = sec->output_section; + } + + if (bfd_is_abs_section (sec)) + sym_pointer->e_type[0] |= N_ABS; + else if (sec == obj_textsec (abfd)) + sym_pointer->e_type[0] |= N_TEXT; + else if (sec == obj_datasec (abfd)) + sym_pointer->e_type[0] |= N_DATA; + else if (sec == obj_bsssec (abfd)) + sym_pointer->e_type[0] |= N_BSS; + else if (bfd_is_und_section (sec)) + sym_pointer->e_type[0] = N_UNDF | N_EXT; + else if (bfd_is_ind_section (sec)) + sym_pointer->e_type[0] = N_INDR; + else if (bfd_is_com_section (sec)) + sym_pointer->e_type[0] = N_UNDF | N_EXT; + else + { + (*_bfd_error_handler) + (_("%s: can not represent section `%s' in a.out object file format"), + bfd_get_filename (abfd), bfd_get_section_name (abfd, sec)); + bfd_set_error (bfd_error_nonrepresentable_section); + return false; + } + + /* Turn the symbol from section relative to absolute again */ + value += sec->vma + off; + + if ((cache_ptr->flags & BSF_WARNING) != 0) + sym_pointer->e_type[0] = N_WARNING; + + if ((cache_ptr->flags & BSF_DEBUGGING) != 0) + sym_pointer->e_type[0] = ((aout_symbol_type *) cache_ptr)->type; + else if ((cache_ptr->flags & BSF_GLOBAL) != 0) + sym_pointer->e_type[0] |= N_EXT; + + if ((cache_ptr->flags & BSF_CONSTRUCTOR) != 0) + { + int type = ((aout_symbol_type *) cache_ptr)->type; + switch (type) + { + case N_ABS: type = N_SETA; break; + case N_TEXT: type = N_SETT; break; + case N_DATA: type = N_SETD; break; + case N_BSS: type = N_SETB; break; + } + sym_pointer->e_type[0] = type; + } + + if ((cache_ptr->flags & BSF_WEAK) != 0) + { + int type; + + switch (sym_pointer->e_type[0] & N_TYPE) + { + default: + case N_ABS: type = N_WEAKA; break; + case N_TEXT: type = N_WEAKT; break; + case N_DATA: type = N_WEAKD; break; + case N_BSS: type = N_WEAKB; break; + case N_UNDF: type = N_WEAKU; break; + } + sym_pointer->e_type[0] = type; + } + + PUT_WORD(abfd, value, sym_pointer->e_value); + + return true; +} + +/* Native-level interface to symbols. */ + +asymbol * +NAME(aout,make_empty_symbol) (abfd) + bfd *abfd; +{ + aout_symbol_type *new = + (aout_symbol_type *)bfd_zalloc (abfd, sizeof (aout_symbol_type)); + if (!new) + return NULL; + new->symbol.the_bfd = abfd; + + return &new->symbol; +} + +/* Translate a set of internal symbols into external symbols. */ + +boolean +NAME(aout,translate_symbol_table) (abfd, in, ext, count, str, strsize, dynamic) + bfd *abfd; + aout_symbol_type *in; + struct external_nlist *ext; + bfd_size_type count; + char *str; + bfd_size_type strsize; + boolean dynamic; +{ + struct external_nlist *ext_end; + + ext_end = ext + count; + for (; ext < ext_end; ext++, in++) + { + bfd_vma x; + + x = GET_WORD (abfd, ext->e_strx); + in->symbol.the_bfd = abfd; + + /* For the normal symbols, the zero index points at the number + of bytes in the string table but is to be interpreted as the + null string. For the dynamic symbols, the number of bytes in + the string table is stored in the __DYNAMIC structure and the + zero index points at an actual string. */ + if (x == 0 && ! dynamic) + in->symbol.name = ""; + else if (x < strsize) + in->symbol.name = str + x; + else + return false; + + in->symbol.value = GET_SWORD (abfd, ext->e_value); + in->desc = bfd_h_get_16 (abfd, ext->e_desc); + in->other = bfd_h_get_8 (abfd, ext->e_other); + in->type = bfd_h_get_8 (abfd, ext->e_type); + in->symbol.udata.p = NULL; + + if (! translate_from_native_sym_flags (abfd, in)) + return false; + + if (dynamic) + in->symbol.flags |= BSF_DYNAMIC; + } + + return true; +} + +/* We read the symbols into a buffer, which is discarded when this + function exits. We read the strings into a buffer large enough to + hold them all plus all the cached symbol entries. */ + +boolean +NAME(aout,slurp_symbol_table) (abfd) + bfd *abfd; +{ + struct external_nlist *old_external_syms; + aout_symbol_type *cached; + size_t cached_size; + + /* If there's no work to be done, don't do any */ + if (obj_aout_symbols (abfd) != (aout_symbol_type *) NULL) + return true; + + old_external_syms = obj_aout_external_syms (abfd); + + if (! aout_get_external_symbols (abfd)) + return false; + + cached_size = (obj_aout_external_sym_count (abfd) + * sizeof (aout_symbol_type)); + cached = (aout_symbol_type *) bfd_malloc (cached_size); + if (cached == NULL && cached_size != 0) + return false; + if (cached_size != 0) + memset (cached, 0, cached_size); + + /* Convert from external symbol information to internal. */ + if (! (NAME(aout,translate_symbol_table) + (abfd, cached, + obj_aout_external_syms (abfd), + obj_aout_external_sym_count (abfd), + obj_aout_external_strings (abfd), + obj_aout_external_string_size (abfd), + false))) + { + free (cached); + return false; + } + + bfd_get_symcount (abfd) = obj_aout_external_sym_count (abfd); + + obj_aout_symbols (abfd) = cached; + + /* It is very likely that anybody who calls this function will not + want the external symbol information, so if it was allocated + because of our call to aout_get_external_symbols, we free it up + right away to save space. */ + if (old_external_syms == (struct external_nlist *) NULL + && obj_aout_external_syms (abfd) != (struct external_nlist *) NULL) + { +#ifdef USE_MMAP + bfd_free_window (&obj_aout_sym_window (abfd)); +#else + free (obj_aout_external_syms (abfd)); +#endif + obj_aout_external_syms (abfd) = NULL; + } + + return true; +} + +/* We use a hash table when writing out symbols so that we only write + out a particular string once. This helps particularly when the + linker writes out stabs debugging entries, because each different + contributing object file tends to have many duplicate stabs + strings. + + This hash table code breaks dbx on SunOS 4.1.3, so we don't do it + if BFD_TRADITIONAL_FORMAT is set. */ + +static bfd_size_type add_to_stringtab + PARAMS ((bfd *, struct bfd_strtab_hash *, const char *, boolean)); +static boolean emit_stringtab PARAMS ((bfd *, struct bfd_strtab_hash *)); + +/* Get the index of a string in a strtab, adding it if it is not + already present. */ + +static INLINE bfd_size_type +add_to_stringtab (abfd, tab, str, copy) + bfd *abfd; + struct bfd_strtab_hash *tab; + const char *str; + boolean copy; +{ + boolean hash; + bfd_size_type index; + + /* An index of 0 always means the empty string. */ + if (str == 0 || *str == '\0') + return 0; + + /* Don't hash if BFD_TRADITIONAL_FORMAT is set, because SunOS dbx + doesn't understand a hashed string table. */ + hash = true; + if ((abfd->flags & BFD_TRADITIONAL_FORMAT) != 0) + hash = false; + + index = _bfd_stringtab_add (tab, str, hash, copy); + + if (index != (bfd_size_type) -1) + { + /* Add BYTES_IN_WORD to the return value to account for the + space taken up by the string table size. */ + index += BYTES_IN_WORD; + } + + return index; +} + +/* Write out a strtab. ABFD is already at the right location in the + file. */ + +static boolean +emit_stringtab (abfd, tab) + register bfd *abfd; + struct bfd_strtab_hash *tab; +{ + bfd_byte buffer[BYTES_IN_WORD]; + + /* The string table starts with the size. */ + PUT_WORD (abfd, _bfd_stringtab_size (tab) + BYTES_IN_WORD, buffer); + if (bfd_write ((PTR) buffer, 1, BYTES_IN_WORD, abfd) != BYTES_IN_WORD) + return false; + + return _bfd_stringtab_emit (abfd, tab); +} + +boolean +NAME(aout,write_syms) (abfd) + bfd *abfd; +{ + unsigned int count ; + asymbol **generic = bfd_get_outsymbols (abfd); + struct bfd_strtab_hash *strtab; + + strtab = _bfd_stringtab_init (); + if (strtab == NULL) + return false; + + for (count = 0; count < bfd_get_symcount (abfd); count++) + { + asymbol *g = generic[count]; + bfd_size_type indx; + struct external_nlist nsp; + + indx = add_to_stringtab (abfd, strtab, g->name, false); + if (indx == (bfd_size_type) -1) + goto error_return; + PUT_WORD (abfd, indx, (bfd_byte *) nsp.e_strx); + + if (bfd_asymbol_flavour(g) == abfd->xvec->flavour) + { + bfd_h_put_16(abfd, aout_symbol(g)->desc, nsp.e_desc); + bfd_h_put_8(abfd, aout_symbol(g)->other, nsp.e_other); + bfd_h_put_8(abfd, aout_symbol(g)->type, nsp.e_type); + } + else + { + bfd_h_put_16(abfd,0, nsp.e_desc); + bfd_h_put_8(abfd, 0, nsp.e_other); + bfd_h_put_8(abfd, 0, nsp.e_type); + } + + if (! translate_to_native_sym_flags (abfd, g, &nsp)) + goto error_return; + + if (bfd_write((PTR)&nsp,1,EXTERNAL_NLIST_SIZE, abfd) + != EXTERNAL_NLIST_SIZE) + goto error_return; + + /* NB: `KEEPIT' currently overlays `udata.p', so set this only + here, at the end. */ + g->KEEPIT = count; + } + + if (! emit_stringtab (abfd, strtab)) + goto error_return; + + _bfd_stringtab_free (strtab); + + return true; + +error_return: + _bfd_stringtab_free (strtab); + return false; +} + + +long +NAME(aout,get_symtab) (abfd, location) + bfd *abfd; + asymbol **location; +{ + unsigned int counter = 0; + aout_symbol_type *symbase; + + if (!NAME(aout,slurp_symbol_table)(abfd)) + return -1; + + for (symbase = obj_aout_symbols(abfd); counter++ < bfd_get_symcount (abfd);) + *(location++) = (asymbol *)( symbase++); + *location++ =0; + return bfd_get_symcount (abfd); +} + + +/* Standard reloc stuff */ +/* Output standard relocation information to a file in target byte order. */ + +extern void NAME(aout,swap_std_reloc_out) + PARAMS ((bfd *, arelent *, struct reloc_std_external *)); + +void +NAME(aout,swap_std_reloc_out) (abfd, g, natptr) + bfd *abfd; + arelent *g; + struct reloc_std_external *natptr; +{ + int r_index; + asymbol *sym = *(g->sym_ptr_ptr); + int r_extern; + unsigned int r_length; + int r_pcrel; + int r_baserel, r_jmptable, r_relative; + asection *output_section = sym->section->output_section; + + PUT_WORD(abfd, g->address, natptr->r_address); + + r_length = g->howto->size ; /* Size as a power of two */ + r_pcrel = (int) g->howto->pc_relative; /* Relative to PC? */ + /* XXX This relies on relocs coming from a.out files. */ + r_baserel = (g->howto->type & 8) != 0; + r_jmptable = (g->howto->type & 16) != 0; + r_relative = (g->howto->type & 32) != 0; + +#if 0 + /* For a standard reloc, the addend is in the object file. */ + r_addend = g->addend + (*(g->sym_ptr_ptr))->section->output_section->vma; +#endif + + /* name was clobbered by aout_write_syms to be symbol index */ + + /* If this relocation is relative to a symbol then set the + r_index to the symbols index, and the r_extern bit. + + Absolute symbols can come in in two ways, either as an offset + from the abs section, or as a symbol which has an abs value. + check for that here + */ + + + if (bfd_is_com_section (output_section) + || bfd_is_abs_section (output_section) + || bfd_is_und_section (output_section)) + { + if (bfd_abs_section_ptr->symbol == sym) + { + /* Whoops, looked like an abs symbol, but is really an offset + from the abs section */ + r_index = N_ABS; + r_extern = 0; + } + else + { + /* Fill in symbol */ + r_extern = 1; + r_index = (*(g->sym_ptr_ptr))->KEEPIT; + + } + } + else + { + /* Just an ordinary section */ + r_extern = 0; + r_index = output_section->target_index; + } + + /* now the fun stuff */ + if (bfd_header_big_endian (abfd)) { + natptr->r_index[0] = r_index >> 16; + natptr->r_index[1] = r_index >> 8; + natptr->r_index[2] = r_index; + natptr->r_type[0] = + (r_extern? RELOC_STD_BITS_EXTERN_BIG: 0) + | (r_pcrel? RELOC_STD_BITS_PCREL_BIG: 0) + | (r_baserel? RELOC_STD_BITS_BASEREL_BIG: 0) + | (r_jmptable? RELOC_STD_BITS_JMPTABLE_BIG: 0) + | (r_relative? RELOC_STD_BITS_RELATIVE_BIG: 0) + | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG); + } else { + natptr->r_index[2] = r_index >> 16; + natptr->r_index[1] = r_index >> 8; + natptr->r_index[0] = r_index; + natptr->r_type[0] = + (r_extern? RELOC_STD_BITS_EXTERN_LITTLE: 0) + | (r_pcrel? RELOC_STD_BITS_PCREL_LITTLE: 0) + | (r_baserel? RELOC_STD_BITS_BASEREL_LITTLE: 0) + | (r_jmptable? RELOC_STD_BITS_JMPTABLE_LITTLE: 0) + | (r_relative? RELOC_STD_BITS_RELATIVE_LITTLE: 0) + | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE); + } +} + + +/* Extended stuff */ +/* Output extended relocation information to a file in target byte order. */ + +extern void NAME(aout,swap_ext_reloc_out) + PARAMS ((bfd *, arelent *, struct reloc_ext_external *)); + +void +NAME(aout,swap_ext_reloc_out) (abfd, g, natptr) + bfd *abfd; + arelent *g; + register struct reloc_ext_external *natptr; +{ + int r_index; + int r_extern; + unsigned int r_type; + unsigned int r_addend; + asymbol *sym = *(g->sym_ptr_ptr); + asection *output_section = sym->section->output_section; + + PUT_WORD (abfd, g->address, natptr->r_address); + + r_type = (unsigned int) g->howto->type; + + r_addend = g->addend; + if ((sym->flags & BSF_SECTION_SYM) != 0) + r_addend += (*(g->sym_ptr_ptr))->section->output_section->vma; + + /* If this relocation is relative to a symbol then set the + r_index to the symbols index, and the r_extern bit. + + Absolute symbols can come in in two ways, either as an offset + from the abs section, or as a symbol which has an abs value. + check for that here. */ + + if (bfd_is_abs_section (bfd_get_section (sym))) + { + r_extern = 0; + r_index = N_ABS; + } + else if ((sym->flags & BSF_SECTION_SYM) == 0) + { + if (bfd_is_und_section (bfd_get_section (sym)) + || (sym->flags & BSF_GLOBAL) != 0) + r_extern = 1; + else + r_extern = 0; + r_index = (*(g->sym_ptr_ptr))->KEEPIT; + } + else + { + /* Just an ordinary section */ + r_extern = 0; + r_index = output_section->target_index; + } + + /* now the fun stuff */ + if (bfd_header_big_endian (abfd)) { + natptr->r_index[0] = r_index >> 16; + natptr->r_index[1] = r_index >> 8; + natptr->r_index[2] = r_index; + natptr->r_type[0] = + ((r_extern? RELOC_EXT_BITS_EXTERN_BIG: 0) + | (r_type << RELOC_EXT_BITS_TYPE_SH_BIG)); + } else { + natptr->r_index[2] = r_index >> 16; + natptr->r_index[1] = r_index >> 8; + natptr->r_index[0] = r_index; + natptr->r_type[0] = + (r_extern? RELOC_EXT_BITS_EXTERN_LITTLE: 0) + | (r_type << RELOC_EXT_BITS_TYPE_SH_LITTLE); + } + + PUT_WORD (abfd, r_addend, natptr->r_addend); +} + +/* BFD deals internally with all things based from the section they're + in. so, something in 10 bytes into a text section with a base of + 50 would have a symbol (.text+10) and know .text vma was 50. + + Aout keeps all it's symbols based from zero, so the symbol would + contain 60. This macro subs the base of each section from the value + to give the true offset from the section */ + + +#define MOVE_ADDRESS(ad) \ + if (r_extern) { \ + /* undefined symbol */ \ + cache_ptr->sym_ptr_ptr = symbols + r_index; \ + cache_ptr->addend = ad; \ + } else { \ + /* defined, section relative. replace symbol with pointer to \ + symbol which points to section */ \ + switch (r_index) { \ + case N_TEXT: \ + case N_TEXT | N_EXT: \ + cache_ptr->sym_ptr_ptr = obj_textsec(abfd)->symbol_ptr_ptr; \ + cache_ptr->addend = ad - su->textsec->vma; \ + break; \ + case N_DATA: \ + case N_DATA | N_EXT: \ + cache_ptr->sym_ptr_ptr = obj_datasec(abfd)->symbol_ptr_ptr; \ + cache_ptr->addend = ad - su->datasec->vma; \ + break; \ + case N_BSS: \ + case N_BSS | N_EXT: \ + cache_ptr->sym_ptr_ptr = obj_bsssec(abfd)->symbol_ptr_ptr; \ + cache_ptr->addend = ad - su->bsssec->vma; \ + break; \ + default: \ + case N_ABS: \ + case N_ABS | N_EXT: \ + cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \ + cache_ptr->addend = ad; \ + break; \ + } \ + } \ + +void +NAME(aout,swap_ext_reloc_in) (abfd, bytes, cache_ptr, symbols, symcount) + bfd *abfd; + struct reloc_ext_external *bytes; + arelent *cache_ptr; + asymbol **symbols; + bfd_size_type symcount; +{ + unsigned int r_index; + int r_extern; + unsigned int r_type; + struct aoutdata *su = &(abfd->tdata.aout_data->a); + + cache_ptr->address = (GET_SWORD (abfd, bytes->r_address)); + + /* now the fun stuff */ + if (bfd_header_big_endian (abfd)) { + r_index = (bytes->r_index[0] << 16) + | (bytes->r_index[1] << 8) + | bytes->r_index[2]; + r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG)); + r_type = (bytes->r_type[0] & RELOC_EXT_BITS_TYPE_BIG) + >> RELOC_EXT_BITS_TYPE_SH_BIG; + } else { + r_index = (bytes->r_index[2] << 16) + | (bytes->r_index[1] << 8) + | bytes->r_index[0]; + r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE)); + r_type = (bytes->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE) + >> RELOC_EXT_BITS_TYPE_SH_LITTLE; + } + + cache_ptr->howto = howto_table_ext + r_type; + + /* Base relative relocs are always against the symbol table, + regardless of the setting of r_extern. r_extern just reflects + whether the symbol the reloc is against is local or global. */ + if (r_type == RELOC_BASE10 + || r_type == RELOC_BASE13 + || r_type == RELOC_BASE22) + r_extern = 1; + + if (r_extern && r_index > symcount) + { + /* We could arrange to return an error, but it might be useful + to see the file even if it is bad. */ + r_extern = 0; + r_index = N_ABS; + } + + MOVE_ADDRESS(GET_SWORD(abfd, bytes->r_addend)); +} + +void +NAME(aout,swap_std_reloc_in) (abfd, bytes, cache_ptr, symbols, symcount) + bfd *abfd; + struct reloc_std_external *bytes; + arelent *cache_ptr; + asymbol **symbols; + bfd_size_type symcount; +{ + unsigned int r_index; + int r_extern; + unsigned int r_length; + int r_pcrel; + int r_baserel, r_jmptable, r_relative; + struct aoutdata *su = &(abfd->tdata.aout_data->a); + unsigned int howto_idx; + + cache_ptr->address = bfd_h_get_32 (abfd, bytes->r_address); + + /* now the fun stuff */ + if (bfd_header_big_endian (abfd)) { + r_index = (bytes->r_index[0] << 16) + | (bytes->r_index[1] << 8) + | bytes->r_index[2]; + r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_BIG)); + r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_BIG)); + r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_BIG)); + r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG)); + r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG)); + r_length = (bytes->r_type[0] & RELOC_STD_BITS_LENGTH_BIG) + >> RELOC_STD_BITS_LENGTH_SH_BIG; + } else { + r_index = (bytes->r_index[2] << 16) + | (bytes->r_index[1] << 8) + | bytes->r_index[0]; + r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE)); + r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE)); + r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_LITTLE)); + r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_LITTLE)); + r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_LITTLE)); + r_length = (bytes->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE) + >> RELOC_STD_BITS_LENGTH_SH_LITTLE; + } + + howto_idx = r_length + 4 * r_pcrel + 8 * r_baserel + + 16 * r_jmptable + 32 * r_relative; + BFD_ASSERT (howto_idx < TABLE_SIZE (howto_table_std)); + cache_ptr->howto = howto_table_std + howto_idx; + BFD_ASSERT (cache_ptr->howto->type != (unsigned int) -1); + + /* Base relative relocs are always against the symbol table, + regardless of the setting of r_extern. r_extern just reflects + whether the symbol the reloc is against is local or global. */ + if (r_baserel) + r_extern = 1; + + if (r_extern && r_index > symcount) + { + /* We could arrange to return an error, but it might be useful + to see the file even if it is bad. */ + r_extern = 0; + r_index = N_ABS; + } + + MOVE_ADDRESS(0); +} + +/* Read and swap the relocs for a section. */ + +boolean +NAME(aout,slurp_reloc_table) (abfd, asect, symbols) + bfd *abfd; + sec_ptr asect; + asymbol **symbols; +{ + unsigned int count; + bfd_size_type reloc_size; + PTR relocs; + arelent *reloc_cache; + size_t each_size; + unsigned int counter = 0; + arelent *cache_ptr; + + if (asect->relocation) + return true; + + if (asect->flags & SEC_CONSTRUCTOR) + return true; + + if (asect == obj_datasec (abfd)) + reloc_size = exec_hdr(abfd)->a_drsize; + else if (asect == obj_textsec (abfd)) + reloc_size = exec_hdr(abfd)->a_trsize; + else if (asect == obj_bsssec (abfd)) + reloc_size = 0; + else + { + bfd_set_error (bfd_error_invalid_operation); + return false; + } + + if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0) + return false; + + each_size = obj_reloc_entry_size (abfd); + + count = reloc_size / each_size; + + reloc_cache = (arelent *) bfd_malloc ((size_t) (count * sizeof (arelent))); + if (reloc_cache == NULL && count != 0) + return false; + memset (reloc_cache, 0, count * sizeof (arelent)); + + relocs = bfd_malloc ((size_t) reloc_size); + if (relocs == NULL && reloc_size != 0) + { + free (reloc_cache); + return false; + } + + if (bfd_read (relocs, 1, reloc_size, abfd) != reloc_size) + { + free (relocs); + free (reloc_cache); + return false; + } + + cache_ptr = reloc_cache; + if (each_size == RELOC_EXT_SIZE) + { + register struct reloc_ext_external *rptr = + (struct reloc_ext_external *) relocs; + + for (; counter < count; counter++, rptr++, cache_ptr++) + NAME(aout,swap_ext_reloc_in) (abfd, rptr, cache_ptr, symbols, + bfd_get_symcount (abfd)); + } + else + { + register struct reloc_std_external *rptr = + (struct reloc_std_external *) relocs; + + for (; counter < count; counter++, rptr++, cache_ptr++) + MY_swap_std_reloc_in (abfd, rptr, cache_ptr, symbols, + bfd_get_symcount (abfd)); + } + + free (relocs); + + asect->relocation = reloc_cache; + asect->reloc_count = cache_ptr - reloc_cache; + + return true; +} + +/* Write out a relocation section into an object file. */ + +boolean +NAME(aout,squirt_out_relocs) (abfd, section) + bfd *abfd; + asection *section; +{ + arelent **generic; + unsigned char *native, *natptr; + size_t each_size; + + unsigned int count = section->reloc_count; + size_t natsize; + + if (count == 0 || section->orelocation == NULL) + return true; + + each_size = obj_reloc_entry_size (abfd); + natsize = each_size * count; + native = (unsigned char *) bfd_zalloc (abfd, natsize); + if (!native) + return false; + + generic = section->orelocation; + + if (each_size == RELOC_EXT_SIZE) + { + for (natptr = native; + count != 0; + --count, natptr += each_size, ++generic) + NAME(aout,swap_ext_reloc_out) (abfd, *generic, (struct reloc_ext_external *)natptr); + } + else + { + for (natptr = native; + count != 0; + --count, natptr += each_size, ++generic) + MY_swap_std_reloc_out(abfd, *generic, (struct reloc_std_external *)natptr); + } + + if ( bfd_write ((PTR) native, 1, natsize, abfd) != natsize) { + bfd_release(abfd, native); + return false; + } + bfd_release (abfd, native); + + return true; +} + +/* This is stupid. This function should be a boolean predicate */ +long +NAME(aout,canonicalize_reloc) (abfd, section, relptr, symbols) + bfd *abfd; + sec_ptr section; + arelent **relptr; + asymbol **symbols; +{ + arelent *tblptr = section->relocation; + unsigned int count; + + if (section == obj_bsssec (abfd)) + { + *relptr = NULL; + return 0; + } + + if (!(tblptr || NAME(aout,slurp_reloc_table)(abfd, section, symbols))) + return -1; + + if (section->flags & SEC_CONSTRUCTOR) { + arelent_chain *chain = section->constructor_chain; + for (count = 0; count < section->reloc_count; count ++) { + *relptr ++ = &chain->relent; + chain = chain->next; + } + } + else { + tblptr = section->relocation; + + for (count = 0; count++ < section->reloc_count;) + { + *relptr++ = tblptr++; + } + } + *relptr = 0; + + return section->reloc_count; +} + +long +NAME(aout,get_reloc_upper_bound) (abfd, asect) + bfd *abfd; + sec_ptr asect; +{ + if (bfd_get_format (abfd) != bfd_object) { + bfd_set_error (bfd_error_invalid_operation); + return -1; + } + if (asect->flags & SEC_CONSTRUCTOR) { + return (sizeof (arelent *) * (asect->reloc_count+1)); + } + + if (asect == obj_datasec (abfd)) + return (sizeof (arelent *) + * ((exec_hdr(abfd)->a_drsize / obj_reloc_entry_size (abfd)) + + 1)); + + if (asect == obj_textsec (abfd)) + return (sizeof (arelent *) + * ((exec_hdr(abfd)->a_trsize / obj_reloc_entry_size (abfd)) + + 1)); + + if (asect == obj_bsssec (abfd)) + return sizeof (arelent *); + + if (asect == obj_bsssec (abfd)) + return 0; + + bfd_set_error (bfd_error_invalid_operation); + return -1; +} + + +long +NAME(aout,get_symtab_upper_bound) (abfd) + bfd *abfd; +{ + if (!NAME(aout,slurp_symbol_table)(abfd)) + return -1; + + return (bfd_get_symcount (abfd)+1) * (sizeof (aout_symbol_type *)); +} + +/*ARGSUSED*/ + alent * +NAME(aout,get_lineno) (ignore_abfd, ignore_symbol) + bfd *ignore_abfd; + asymbol *ignore_symbol; +{ +return (alent *)NULL; +} + +/*ARGSUSED*/ +void +NAME(aout,get_symbol_info) (ignore_abfd, symbol, ret) + bfd *ignore_abfd; + asymbol *symbol; + symbol_info *ret; +{ + bfd_symbol_info (symbol, ret); + + if (ret->type == '?') + { + int type_code = aout_symbol(symbol)->type & 0xff; + const char *stab_name = bfd_get_stab_name (type_code); + static char buf[10]; + + if (stab_name == NULL) + { + sprintf(buf, "(%d)", type_code); + stab_name = buf; + } + ret->type = '-'; + ret->stab_type = type_code; + ret->stab_other = (unsigned)(aout_symbol(symbol)->other & 0xff); + ret->stab_desc = (unsigned)(aout_symbol(symbol)->desc & 0xffff); + ret->stab_name = stab_name; + } +} + +/*ARGSUSED*/ +void +NAME(aout,print_symbol) (ignore_abfd, afile, symbol, how) + bfd *ignore_abfd; + PTR afile; + asymbol *symbol; + bfd_print_symbol_type how; +{ + FILE *file = (FILE *)afile; + + switch (how) { + case bfd_print_symbol_name: + if (symbol->name) + fprintf(file,"%s", symbol->name); + break; + case bfd_print_symbol_more: + fprintf(file,"%4x %2x %2x",(unsigned)(aout_symbol(symbol)->desc & 0xffff), + (unsigned)(aout_symbol(symbol)->other & 0xff), + (unsigned)(aout_symbol(symbol)->type)); + break; + case bfd_print_symbol_all: + { + CONST char *section_name = symbol->section->name; + + + bfd_print_symbol_vandf((PTR)file,symbol); + + fprintf(file," %-5s %04x %02x %02x", + section_name, + (unsigned)(aout_symbol(symbol)->desc & 0xffff), + (unsigned)(aout_symbol(symbol)->other & 0xff), + (unsigned)(aout_symbol(symbol)->type & 0xff)); + if (symbol->name) + fprintf(file," %s", symbol->name); + } + break; + } +} + +/* If we don't have to allocate more than 1MB to hold the generic + symbols, we use the generic minisymbol methord: it's faster, since + it only translates the symbols once, not multiple times. */ +#define MINISYM_THRESHOLD (1000000 / sizeof (asymbol)) + +/* Read minisymbols. For minisymbols, we use the unmodified a.out + symbols. The minisymbol_to_symbol function translates these into + BFD asymbol structures. */ + +long +NAME(aout,read_minisymbols) (abfd, dynamic, minisymsp, sizep) + bfd *abfd; + boolean dynamic; + PTR *minisymsp; + unsigned int *sizep; +{ + if (dynamic) + { + /* We could handle the dynamic symbols here as well, but it's + easier to hand them off. */ + return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep); + } + + if (! aout_get_external_symbols (abfd)) + return -1; + + if (obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD) + return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep); + + *minisymsp = (PTR) obj_aout_external_syms (abfd); + + /* By passing the external symbols back from this routine, we are + giving up control over the memory block. Clear + obj_aout_external_syms, so that we do not try to free it + ourselves. */ + obj_aout_external_syms (abfd) = NULL; + + *sizep = EXTERNAL_NLIST_SIZE; + return obj_aout_external_sym_count (abfd); +} + +/* Convert a minisymbol to a BFD asymbol. A minisymbol is just an + unmodified a.out symbol. The SYM argument is a structure returned + by bfd_make_empty_symbol, which we fill in here. */ + +asymbol * +NAME(aout,minisymbol_to_symbol) (abfd, dynamic, minisym, sym) + bfd *abfd; + boolean dynamic; + const PTR minisym; + asymbol *sym; +{ + if (dynamic + || obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD) + return _bfd_generic_minisymbol_to_symbol (abfd, dynamic, minisym, sym); + + memset (sym, 0, sizeof (aout_symbol_type)); + + /* We call translate_symbol_table to translate a single symbol. */ + if (! (NAME(aout,translate_symbol_table) + (abfd, + (aout_symbol_type *) sym, + (struct external_nlist *) minisym, + (bfd_size_type) 1, + obj_aout_external_strings (abfd), + obj_aout_external_string_size (abfd), + false))) + return NULL; + + return sym; +} + +/* + provided a BFD, a section and an offset into the section, calculate + and return the name of the source file and the line nearest to the + wanted location. +*/ + +boolean +NAME(aout,find_nearest_line) + (abfd, section, symbols, offset, filename_ptr, functionname_ptr, line_ptr) + bfd *abfd; + asection *section; + asymbol **symbols; + bfd_vma offset; + CONST char **filename_ptr; + CONST char **functionname_ptr; + unsigned int *line_ptr; +{ + /* Run down the file looking for the filename, function and linenumber */ + asymbol **p; + CONST char *directory_name = NULL; + CONST char *main_file_name = NULL; + CONST char *current_file_name = NULL; + CONST char *line_file_name = NULL; /* Value of current_file_name at line number. */ + CONST char *line_directory_name = NULL; /* Value of directory_name at line number. */ + bfd_vma low_line_vma = 0; + bfd_vma low_func_vma = 0; + asymbol *func = 0; + size_t filelen, funclen; + char *buf; + + *filename_ptr = abfd->filename; + *functionname_ptr = 0; + *line_ptr = 0; + if (symbols != (asymbol **)NULL) { + for (p = symbols; *p; p++) { + aout_symbol_type *q = (aout_symbol_type *)(*p); + next: + switch (q->type){ + case N_TEXT: + /* If this looks like a file name symbol, and it comes after + the line number we have found so far, but before the + offset, then we have probably not found the right line + number. */ + if (q->symbol.value <= offset + && ((q->symbol.value > low_line_vma + && (line_file_name != NULL + || *line_ptr != 0)) + || (q->symbol.value > low_func_vma + && func != NULL))) + { + const char *symname; + + symname = q->symbol.name; + if (strcmp (symname + strlen (symname) - 2, ".o") == 0) + { + if (q->symbol.value > low_line_vma) + { + *line_ptr = 0; + line_file_name = NULL; + } + if (q->symbol.value > low_func_vma) + func = NULL; + } + } + break; + + case N_SO: + /* If this symbol is less than the offset, but greater than + the line number we have found so far, then we have not + found the right line number. */ + if (q->symbol.value <= offset) + { + if (q->symbol.value > low_line_vma) + { + *line_ptr = 0; + line_file_name = NULL; + } + if (q->symbol.value > low_func_vma) + func = NULL; + } + + main_file_name = current_file_name = q->symbol.name; + /* Look ahead to next symbol to check if that too is an N_SO. */ + p++; + if (*p == NULL) + break; + q = (aout_symbol_type *)(*p); + if (q->type != (int)N_SO) + goto next; + + /* Found a second N_SO First is directory; second is filename. */ + directory_name = current_file_name; + main_file_name = current_file_name = q->symbol.name; + if (obj_textsec(abfd) != section) + goto done; + break; + case N_SOL: + current_file_name = q->symbol.name; + break; + + case N_SLINE: + + case N_DSLINE: + case N_BSLINE: + /* We'll keep this if it resolves nearer than the one we have + already. */ + if (q->symbol.value >= low_line_vma + && q->symbol.value <= offset) + { + *line_ptr = q->desc; + low_line_vma = q->symbol.value; + line_file_name = current_file_name; + line_directory_name = directory_name; + } + break; + case N_FUN: + { + /* We'll keep this if it is nearer than the one we have already */ + if (q->symbol.value >= low_func_vma && + q->symbol.value <= offset) { + low_func_vma = q->symbol.value; + func = (asymbol *)q; + } + else if (q->symbol.value > offset) + goto done; + } + break; + } + } + } + + done: + if (*line_ptr != 0) + { + main_file_name = line_file_name; + directory_name = line_directory_name; + } + + if (main_file_name == NULL + || main_file_name[0] == '/' + || directory_name == NULL) + filelen = 0; + else + filelen = strlen (directory_name) + strlen (main_file_name); + if (func == NULL) + funclen = 0; + else + funclen = strlen (bfd_asymbol_name (func)); + + if (adata (abfd).line_buf != NULL) + free (adata (abfd).line_buf); + if (filelen + funclen == 0) + adata (abfd).line_buf = buf = NULL; + else + { + buf = (char *) bfd_malloc (filelen + funclen + 3); + adata (abfd).line_buf = buf; + if (buf == NULL) + return false; + } + + if (main_file_name != NULL) + { + if (main_file_name[0] == '/' || directory_name == NULL) + *filename_ptr = main_file_name; + else + { + sprintf (buf, "%s%s", directory_name, main_file_name); + *filename_ptr = buf; + buf += filelen + 1; + } + } + + if (func) + { + const char *function = func->name; + char *p; + + /* The caller expects a symbol name. We actually have a + function name, without the leading underscore. Put the + underscore back in, so that the caller gets a symbol name. */ + if (bfd_get_symbol_leading_char (abfd) == '\0') + strcpy (buf, function); + else + { + buf[0] = bfd_get_symbol_leading_char (abfd); + strcpy (buf + 1, function); + } + /* Have to remove : stuff */ + p = strchr (buf, ':'); + if (p != NULL) + *p = '\0'; + *functionname_ptr = buf; + } + + return true; +} + +/*ARGSUSED*/ +int +NAME(aout,sizeof_headers) (abfd, execable) + bfd *abfd; + boolean execable; +{ + return adata(abfd).exec_bytes_size; +} + +/* Free all information we have cached for this BFD. We can always + read it again later if we need it. */ + +boolean +NAME(aout,bfd_free_cached_info) (abfd) + bfd *abfd; +{ + asection *o; + + if (bfd_get_format (abfd) != bfd_object) + return true; + +#define BFCI_FREE(x) if (x != NULL) { free (x); x = NULL; } + BFCI_FREE (obj_aout_symbols (abfd)); +#ifdef USE_MMAP + obj_aout_external_syms (abfd) = 0; + bfd_free_window (&obj_aout_sym_window (abfd)); + bfd_free_window (&obj_aout_string_window (abfd)); + obj_aout_external_strings (abfd) = 0; +#else + BFCI_FREE (obj_aout_external_syms (abfd)); + BFCI_FREE (obj_aout_external_strings (abfd)); +#endif + for (o = abfd->sections; o != (asection *) NULL; o = o->next) + BFCI_FREE (o->relocation); +#undef BFCI_FREE + + return true; +} + +/* a.out link code. */ + +static boolean aout_link_add_object_symbols + PARAMS ((bfd *, struct bfd_link_info *)); +static boolean aout_link_check_archive_element + PARAMS ((bfd *, struct bfd_link_info *, boolean *)); +static boolean aout_link_free_symbols PARAMS ((bfd *)); +static boolean aout_link_check_ar_symbols + PARAMS ((bfd *, struct bfd_link_info *, boolean *pneeded)); +static boolean aout_link_add_symbols + PARAMS ((bfd *, struct bfd_link_info *)); + +/* Routine to create an entry in an a.out link hash table. */ + +struct bfd_hash_entry * +NAME(aout,link_hash_newfunc) (entry, table, string) + struct bfd_hash_entry *entry; + struct bfd_hash_table *table; + const char *string; +{ + struct aout_link_hash_entry *ret = (struct aout_link_hash_entry *) entry; + + /* Allocate the structure if it has not already been allocated by a + subclass. */ + if (ret == (struct aout_link_hash_entry *) NULL) + ret = ((struct aout_link_hash_entry *) + bfd_hash_allocate (table, sizeof (struct aout_link_hash_entry))); + if (ret == (struct aout_link_hash_entry *) NULL) + return (struct bfd_hash_entry *) ret; + + /* Call the allocation method of the superclass. */ + ret = ((struct aout_link_hash_entry *) + _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret, + table, string)); + if (ret) + { + /* Set local fields. */ + ret->written = false; + ret->indx = -1; + } + + return (struct bfd_hash_entry *) ret; +} + +/* Initialize an a.out link hash table. */ + +boolean +NAME(aout,link_hash_table_init) (table, abfd, newfunc) + struct aout_link_hash_table *table; + bfd *abfd; + struct bfd_hash_entry *(*newfunc) PARAMS ((struct bfd_hash_entry *, + struct bfd_hash_table *, + const char *)); +{ + return _bfd_link_hash_table_init (&table->root, abfd, newfunc); +} + +/* Create an a.out link hash table. */ + +struct bfd_link_hash_table * +NAME(aout,link_hash_table_create) (abfd) + bfd *abfd; +{ + struct aout_link_hash_table *ret; + + ret = ((struct aout_link_hash_table *) + bfd_alloc (abfd, sizeof (struct aout_link_hash_table))); + if (ret == NULL) + return (struct bfd_link_hash_table *) NULL; + if (! NAME(aout,link_hash_table_init) (ret, abfd, + NAME(aout,link_hash_newfunc))) + { + free (ret); + return (struct bfd_link_hash_table *) NULL; + } + return &ret->root; +} + +/* Given an a.out BFD, add symbols to the global hash table as + appropriate. */ + +boolean +NAME(aout,link_add_symbols) (abfd, info) + bfd *abfd; + struct bfd_link_info *info; +{ + switch (bfd_get_format (abfd)) + { + case bfd_object: + return aout_link_add_object_symbols (abfd, info); + case bfd_archive: + return _bfd_generic_link_add_archive_symbols + (abfd, info, aout_link_check_archive_element); + default: + bfd_set_error (bfd_error_wrong_format); + return false; + } +} + +/* Add symbols from an a.out object file. */ + +static boolean +aout_link_add_object_symbols (abfd, info) + bfd *abfd; + struct bfd_link_info *info; +{ + if (! aout_get_external_symbols (abfd)) + return false; + if (! aout_link_add_symbols (abfd, info)) + return false; + if (! info->keep_memory) + { + if (! aout_link_free_symbols (abfd)) + return false; + } + return true; +} + +/* Check a single archive element to see if we need to include it in + the link. *PNEEDED is set according to whether this element is + needed in the link or not. This is called from + _bfd_generic_link_add_archive_symbols. */ + +static boolean +aout_link_check_archive_element (abfd, info, pneeded) + bfd *abfd; + struct bfd_link_info *info; + boolean *pneeded; +{ + if (! aout_get_external_symbols (abfd)) + return false; + + if (! aout_link_check_ar_symbols (abfd, info, pneeded)) + return false; + + if (*pneeded) + { + if (! aout_link_add_symbols (abfd, info)) + return false; + } + + if (! info->keep_memory || ! *pneeded) + { + if (! aout_link_free_symbols (abfd)) + return false; + } + + return true; +} + +/* Free up the internal symbols read from an a.out file. */ + +static boolean +aout_link_free_symbols (abfd) + bfd *abfd; +{ + if (obj_aout_external_syms (abfd) != (struct external_nlist *) NULL) + { +#ifdef USE_MMAP + bfd_free_window (&obj_aout_sym_window (abfd)); +#else + free ((PTR) obj_aout_external_syms (abfd)); +#endif + obj_aout_external_syms (abfd) = (struct external_nlist *) NULL; + } + if (obj_aout_external_strings (abfd) != (char *) NULL) + { +#ifdef USE_MMAP + bfd_free_window (&obj_aout_string_window (abfd)); +#else + free ((PTR) obj_aout_external_strings (abfd)); +#endif + obj_aout_external_strings (abfd) = (char *) NULL; + } + return true; +} + +/* Look through the internal symbols to see if this object file should + be included in the link. We should include this object file if it + defines any symbols which are currently undefined. If this object + file defines a common symbol, then we may adjust the size of the + known symbol but we do not include the object file in the link + (unless there is some other reason to include it). */ + +static boolean +aout_link_check_ar_symbols (abfd, info, pneeded) + bfd *abfd; + struct bfd_link_info *info; + boolean *pneeded; +{ + register struct external_nlist *p; + struct external_nlist *pend; + char *strings; + + *pneeded = false; + + /* Look through all the symbols. */ + p = obj_aout_external_syms (abfd); + pend = p + obj_aout_external_sym_count (abfd); + strings = obj_aout_external_strings (abfd); + for (; p < pend; p++) + { + int type = bfd_h_get_8 (abfd, p->e_type); + const char *name; + struct bfd_link_hash_entry *h; + + /* Ignore symbols that are not externally visible. This is an + optimization only, as we check the type more thoroughly + below. */ + if (((type & N_EXT) == 0 + || (type & N_STAB) != 0 + || type == N_FN) + && type != N_WEAKA + && type != N_WEAKT + && type != N_WEAKD + && type != N_WEAKB) + { + if (type == N_WARNING + || type == N_INDR) + ++p; + continue; + } + + name = strings + GET_WORD (abfd, p->e_strx); + h = bfd_link_hash_lookup (info->hash, name, false, false, true); + + /* We are only interested in symbols that are currently + undefined or common. */ + if (h == (struct bfd_link_hash_entry *) NULL + || (h->type != bfd_link_hash_undefined + && h->type != bfd_link_hash_common)) + { + if (type == (N_INDR | N_EXT)) + ++p; + continue; + } + + if (type == (N_TEXT | N_EXT) + || type == (N_DATA | N_EXT) + || type == (N_BSS | N_EXT) + || type == (N_ABS | N_EXT) + || type == (N_INDR | N_EXT)) + { + /* This object file defines this symbol. We must link it + in. This is true regardless of whether the current + definition of the symbol is undefined or common. If the + current definition is common, we have a case in which we + have already seen an object file including + int a; + and this object file from the archive includes + int a = 5; + In such a case we must include this object file. + + FIXME: The SunOS 4.1.3 linker will pull in the archive + element if the symbol is defined in the .data section, + but not if it is defined in the .text section. That + seems a bit crazy to me, and I haven't implemented it. + However, it might be correct. */ + if (! (*info->callbacks->add_archive_element) (info, abfd, name)) + return false; + *pneeded = true; + return true; + } + + if (type == (N_UNDF | N_EXT)) + { + bfd_vma value; + + value = GET_WORD (abfd, p->e_value); + if (value != 0) + { + /* This symbol is common in the object from the archive + file. */ + if (h->type == bfd_link_hash_undefined) + { + bfd *symbfd; + unsigned int power; + + symbfd = h->u.undef.abfd; + if (symbfd == (bfd *) NULL) + { + /* This symbol was created as undefined from + outside BFD. We assume that we should link + in the object file. This is done for the -u + option in the linker. */ + if (! (*info->callbacks->add_archive_element) (info, + abfd, + name)) + return false; + *pneeded = true; + return true; + } + /* Turn the current link symbol into a common + symbol. It is already on the undefs list. */ + h->type = bfd_link_hash_common; + h->u.c.p = ((struct bfd_link_hash_common_entry *) + bfd_hash_allocate (&info->hash->table, + sizeof (struct bfd_link_hash_common_entry))); + if (h->u.c.p == NULL) + return false; + + h->u.c.size = value; + + /* FIXME: This isn't quite right. The maximum + alignment of a common symbol should be set by the + architecture of the output file, not of the input + file. */ + power = bfd_log2 (value); + if (power > bfd_get_arch_info (abfd)->section_align_power) + power = bfd_get_arch_info (abfd)->section_align_power; + h->u.c.p->alignment_power = power; + + h->u.c.p->section = bfd_make_section_old_way (symbfd, + "COMMON"); + } + else + { + /* Adjust the size of the common symbol if + necessary. */ + if (value > h->u.c.size) + h->u.c.size = value; + } + } + } + + if (type == N_WEAKA + || type == N_WEAKT + || type == N_WEAKD + || type == N_WEAKB) + { + /* This symbol is weak but defined. We must pull it in if + the current link symbol is undefined, but we don't want + it if the current link symbol is common. */ + if (h->type == bfd_link_hash_undefined) + { + if (! (*info->callbacks->add_archive_element) (info, abfd, name)) + return false; + *pneeded = true; + return true; + } + } + } + + /* We do not need this object file. */ + return true; +} + +/* Add all symbols from an object file to the hash table. */ + +static boolean +aout_link_add_symbols (abfd, info) + bfd *abfd; + struct bfd_link_info *info; +{ + boolean (*add_one_symbol) PARAMS ((struct bfd_link_info *, bfd *, + const char *, flagword, asection *, + bfd_vma, const char *, boolean, + boolean, + struct bfd_link_hash_entry **)); + struct external_nlist *syms; + bfd_size_type sym_count; + char *strings; + boolean copy; + struct aout_link_hash_entry **sym_hash; + register struct external_nlist *p; + struct external_nlist *pend; + + syms = obj_aout_external_syms (abfd); + sym_count = obj_aout_external_sym_count (abfd); + strings = obj_aout_external_strings (abfd); + if (info->keep_memory) + copy = false; + else + copy = true; + + if (aout_backend_info (abfd)->add_dynamic_symbols != NULL) + { + if (! ((*aout_backend_info (abfd)->add_dynamic_symbols) + (abfd, info, &syms, &sym_count, &strings))) + return false; + } + + /* We keep a list of the linker hash table entries that correspond + to particular symbols. We could just look them up in the hash + table, but keeping the list is more efficient. Perhaps this + should be conditional on info->keep_memory. */ + sym_hash = ((struct aout_link_hash_entry **) + bfd_alloc (abfd, + ((size_t) sym_count + * sizeof (struct aout_link_hash_entry *)))); + if (sym_hash == NULL && sym_count != 0) + return false; + obj_aout_sym_hashes (abfd) = sym_hash; + + add_one_symbol = aout_backend_info (abfd)->add_one_symbol; + if (add_one_symbol == NULL) + add_one_symbol = _bfd_generic_link_add_one_symbol; + + p = syms; + pend = p + sym_count; + for (; p < pend; p++, sym_hash++) + { + int type; + const char *name; + bfd_vma value; + asection *section; + flagword flags; + const char *string; + + *sym_hash = NULL; + + type = bfd_h_get_8 (abfd, p->e_type); + + /* Ignore debugging symbols. */ + if ((type & N_STAB) != 0) + continue; + + name = strings + GET_WORD (abfd, p->e_strx); + value = GET_WORD (abfd, p->e_value); + flags = BSF_GLOBAL; + string = NULL; + switch (type) + { + default: + abort (); + + case N_UNDF: + case N_ABS: + case N_TEXT: + case N_DATA: + case N_BSS: + case N_FN_SEQ: + case N_COMM: + case N_SETV: + case N_FN: + /* Ignore symbols that are not externally visible. */ + continue; + case N_INDR: + /* Ignore local indirect symbol. */ + ++p; + ++sym_hash; + continue; + + case N_UNDF | N_EXT: + if (value == 0) + { + section = bfd_und_section_ptr; + flags = 0; + } + else + section = bfd_com_section_ptr; + break; + case N_ABS | N_EXT: + section = bfd_abs_section_ptr; + break; + case N_TEXT | N_EXT: + section = obj_textsec (abfd); + value -= bfd_get_section_vma (abfd, section); + break; + case N_DATA | N_EXT: + case N_SETV | N_EXT: + /* Treat N_SETV symbols as N_DATA symbol; see comment in + translate_from_native_sym_flags. */ + section = obj_datasec (abfd); + value -= bfd_get_section_vma (abfd, section); + break; + case N_BSS | N_EXT: + section = obj_bsssec (abfd); + value -= bfd_get_section_vma (abfd, section); + break; + case N_INDR | N_EXT: + /* An indirect symbol. The next symbol is the symbol + which this one really is. */ + BFD_ASSERT (p + 1 < pend); + ++p; + string = strings + GET_WORD (abfd, p->e_strx); + section = bfd_ind_section_ptr; + flags |= BSF_INDIRECT; + break; + case N_COMM | N_EXT: + section = bfd_com_section_ptr; + break; + case N_SETA: case N_SETA | N_EXT: + section = bfd_abs_section_ptr; + flags |= BSF_CONSTRUCTOR; + break; + case N_SETT: case N_SETT | N_EXT: + section = obj_textsec (abfd); + flags |= BSF_CONSTRUCTOR; + value -= bfd_get_section_vma (abfd, section); + break; + case N_SETD: case N_SETD | N_EXT: + section = obj_datasec (abfd); + flags |= BSF_CONSTRUCTOR; + value -= bfd_get_section_vma (abfd, section); + break; + case N_SETB: case N_SETB | N_EXT: + section = obj_bsssec (abfd); + flags |= BSF_CONSTRUCTOR; + value -= bfd_get_section_vma (abfd, section); + break; + case N_WARNING: + /* A warning symbol. The next symbol is the one to warn + about. */ + BFD_ASSERT (p + 1 < pend); + ++p; + string = name; + name = strings + GET_WORD (abfd, p->e_strx); + section = bfd_und_section_ptr; + flags |= BSF_WARNING; + break; + case N_WEAKU: + section = bfd_und_section_ptr; + flags = BSF_WEAK; + break; + case N_WEAKA: + section = bfd_abs_section_ptr; + flags = BSF_WEAK; + break; + case N_WEAKT: + section = obj_textsec (abfd); + value -= bfd_get_section_vma (abfd, section); + flags = BSF_WEAK; + break; + case N_WEAKD: + section = obj_datasec (abfd); + value -= bfd_get_section_vma (abfd, section); + flags = BSF_WEAK; + break; + case N_WEAKB: + section = obj_bsssec (abfd); + value -= bfd_get_section_vma (abfd, section); + flags = BSF_WEAK; + break; + } + + if (! ((*add_one_symbol) + (info, abfd, name, flags, section, value, string, copy, false, + (struct bfd_link_hash_entry **) sym_hash))) + return false; + + /* Restrict the maximum alignment of a common symbol based on + the architecture, since a.out has no way to represent + alignment requirements of a section in a .o file. FIXME: + This isn't quite right: it should use the architecture of the + output file, not the input files. */ + if ((*sym_hash)->root.type == bfd_link_hash_common + && ((*sym_hash)->root.u.c.p->alignment_power > + bfd_get_arch_info (abfd)->section_align_power)) + (*sym_hash)->root.u.c.p->alignment_power = + bfd_get_arch_info (abfd)->section_align_power; + + /* If this is a set symbol, and we are not building sets, then + it is possible for the hash entry to not have been set. In + such a case, treat the symbol as not globally defined. */ + if ((*sym_hash)->root.type == bfd_link_hash_new) + { + BFD_ASSERT ((flags & BSF_CONSTRUCTOR) != 0); + *sym_hash = NULL; + } + + if (type == (N_INDR | N_EXT) || type == N_WARNING) + ++sym_hash; + } + + return true; +} + +/* A hash table used for header files with N_BINCL entries. */ + +struct aout_link_includes_table +{ + struct bfd_hash_table root; +}; + +/* A linked list of totals that we have found for a particular header + file. */ + +struct aout_link_includes_totals +{ + struct aout_link_includes_totals *next; + bfd_vma total; +}; + +/* An entry in the header file hash table. */ + +struct aout_link_includes_entry +{ + struct bfd_hash_entry root; + /* List of totals we have found for this file. */ + struct aout_link_includes_totals *totals; +}; + +/* Look up an entry in an the header file hash table. */ + +#define aout_link_includes_lookup(table, string, create, copy) \ + ((struct aout_link_includes_entry *) \ + bfd_hash_lookup (&(table)->root, (string), (create), (copy))) + +/* During the final link step we need to pass around a bunch of + information, so we do it in an instance of this structure. */ + +struct aout_final_link_info +{ + /* General link information. */ + struct bfd_link_info *info; + /* Output bfd. */ + bfd *output_bfd; + /* Reloc file positions. */ + file_ptr treloff, dreloff; + /* File position of symbols. */ + file_ptr symoff; + /* String table. */ + struct bfd_strtab_hash *strtab; + /* Header file hash table. */ + struct aout_link_includes_table includes; + /* A buffer large enough to hold the contents of any section. */ + bfd_byte *contents; + /* A buffer large enough to hold the relocs of any section. */ + PTR relocs; + /* A buffer large enough to hold the symbol map of any input BFD. */ + int *symbol_map; + /* A buffer large enough to hold output symbols of any input BFD. */ + struct external_nlist *output_syms; +}; + +static struct bfd_hash_entry *aout_link_includes_newfunc + PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); +static boolean aout_link_input_bfd + PARAMS ((struct aout_final_link_info *, bfd *input_bfd)); +static boolean aout_link_write_symbols + PARAMS ((struct aout_final_link_info *, bfd *input_bfd)); +static boolean aout_link_write_other_symbol + PARAMS ((struct aout_link_hash_entry *, PTR)); +static boolean aout_link_input_section + PARAMS ((struct aout_final_link_info *, bfd *input_bfd, + asection *input_section, file_ptr *reloff_ptr, + bfd_size_type rel_size)); +static boolean aout_link_input_section_std + PARAMS ((struct aout_final_link_info *, bfd *input_bfd, + asection *input_section, struct reloc_std_external *, + bfd_size_type rel_size, bfd_byte *contents)); +static boolean aout_link_input_section_ext + PARAMS ((struct aout_final_link_info *, bfd *input_bfd, + asection *input_section, struct reloc_ext_external *, + bfd_size_type rel_size, bfd_byte *contents)); +static INLINE asection *aout_reloc_index_to_section + PARAMS ((bfd *, int)); +static boolean aout_link_reloc_link_order + PARAMS ((struct aout_final_link_info *, asection *, + struct bfd_link_order *)); + +/* The function to create a new entry in the header file hash table. */ + +static struct bfd_hash_entry * +aout_link_includes_newfunc (entry, table, string) + struct bfd_hash_entry *entry; + struct bfd_hash_table *table; + const char *string; +{ + struct aout_link_includes_entry *ret = + (struct aout_link_includes_entry *) entry; + + /* Allocate the structure if it has not already been allocated by a + subclass. */ + if (ret == (struct aout_link_includes_entry *) NULL) + ret = ((struct aout_link_includes_entry *) + bfd_hash_allocate (table, + sizeof (struct aout_link_includes_entry))); + if (ret == (struct aout_link_includes_entry *) NULL) + return (struct bfd_hash_entry *) ret; + + /* Call the allocation method of the superclass. */ + ret = ((struct aout_link_includes_entry *) + bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string)); + if (ret) + { + /* Set local fields. */ + ret->totals = NULL; + } + + return (struct bfd_hash_entry *) ret; +} + +/* Do the final link step. This is called on the output BFD. The + INFO structure should point to a list of BFDs linked through the + link_next field which can be used to find each BFD which takes part + in the output. Also, each section in ABFD should point to a list + of bfd_link_order structures which list all the input sections for + the output section. */ + +boolean +NAME(aout,final_link) (abfd, info, callback) + bfd *abfd; + struct bfd_link_info *info; + void (*callback) PARAMS ((bfd *, file_ptr *, file_ptr *, file_ptr *)); +{ + struct aout_final_link_info aout_info; + boolean includes_hash_initialized = false; + register bfd *sub; + bfd_size_type trsize, drsize; + size_t max_contents_size; + size_t max_relocs_size; + size_t max_sym_count; + bfd_size_type text_size; + file_ptr text_end; + register struct bfd_link_order *p; + asection *o; + boolean have_link_order_relocs; + + if (info->shared) + abfd->flags |= DYNAMIC; + + aout_info.info = info; + aout_info.output_bfd = abfd; + aout_info.contents = NULL; + aout_info.relocs = NULL; + aout_info.symbol_map = NULL; + aout_info.output_syms = NULL; + + if (! bfd_hash_table_init_n (&aout_info.includes.root, + aout_link_includes_newfunc, + 251)) + goto error_return; + includes_hash_initialized = true; + + /* Figure out the largest section size. Also, if generating + relocateable output, count the relocs. */ + trsize = 0; + drsize = 0; + max_contents_size = 0; + max_relocs_size = 0; + max_sym_count = 0; + for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) + { + size_t sz; + + if (info->relocateable) + { + if (bfd_get_flavour (sub) == bfd_target_aout_flavour) + { + trsize += exec_hdr (sub)->a_trsize; + drsize += exec_hdr (sub)->a_drsize; + } + else + { + /* FIXME: We need to identify the .text and .data sections + and call get_reloc_upper_bound and canonicalize_reloc to + work out the number of relocs needed, and then multiply + by the reloc size. */ + (*_bfd_error_handler) + (_("%s: relocateable link from %s to %s not supported"), + bfd_get_filename (abfd), + sub->xvec->name, abfd->xvec->name); + bfd_set_error (bfd_error_invalid_operation); + goto error_return; + } + } + + if (bfd_get_flavour (sub) == bfd_target_aout_flavour) + { + sz = bfd_section_size (sub, obj_textsec (sub)); + if (sz > max_contents_size) + max_contents_size = sz; + sz = bfd_section_size (sub, obj_datasec (sub)); + if (sz > max_contents_size) + max_contents_size = sz; + + sz = exec_hdr (sub)->a_trsize; + if (sz > max_relocs_size) + max_relocs_size = sz; + sz = exec_hdr (sub)->a_drsize; + if (sz > max_relocs_size) + max_relocs_size = sz; + + sz = obj_aout_external_sym_count (sub); + if (sz > max_sym_count) + max_sym_count = sz; + } + } + + if (info->relocateable) + { + if (obj_textsec (abfd) != (asection *) NULL) + trsize += (_bfd_count_link_order_relocs (obj_textsec (abfd) + ->link_order_head) + * obj_reloc_entry_size (abfd)); + if (obj_datasec (abfd) != (asection *) NULL) + drsize += (_bfd_count_link_order_relocs (obj_datasec (abfd) + ->link_order_head) + * obj_reloc_entry_size (abfd)); + } + + exec_hdr (abfd)->a_trsize = trsize; + exec_hdr (abfd)->a_drsize = drsize; + + exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd); + + /* Adjust the section sizes and vmas according to the magic number. + This sets a_text, a_data and a_bss in the exec_hdr and sets the + filepos for each section. */ + if (! NAME(aout,adjust_sizes_and_vmas) (abfd, &text_size, &text_end)) + goto error_return; + + /* The relocation and symbol file positions differ among a.out + targets. We are passed a callback routine from the backend + specific code to handle this. + FIXME: At this point we do not know how much space the symbol + table will require. This will not work for any (nonstandard) + a.out target that needs to know the symbol table size before it + can compute the relocation file positions. This may or may not + be the case for the hp300hpux target, for example. */ + (*callback) (abfd, &aout_info.treloff, &aout_info.dreloff, + &aout_info.symoff); + obj_textsec (abfd)->rel_filepos = aout_info.treloff; + obj_datasec (abfd)->rel_filepos = aout_info.dreloff; + obj_sym_filepos (abfd) = aout_info.symoff; + + /* We keep a count of the symbols as we output them. */ + obj_aout_external_sym_count (abfd) = 0; + + /* We accumulate the string table as we write out the symbols. */ + aout_info.strtab = _bfd_stringtab_init (); + if (aout_info.strtab == NULL) + goto error_return; + + /* Allocate buffers to hold section contents and relocs. */ + aout_info.contents = (bfd_byte *) bfd_malloc (max_contents_size); + aout_info.relocs = (PTR) bfd_malloc (max_relocs_size); + aout_info.symbol_map = (int *) bfd_malloc (max_sym_count * sizeof (int *)); + aout_info.output_syms = ((struct external_nlist *) + bfd_malloc ((max_sym_count + 1) + * sizeof (struct external_nlist))); + if ((aout_info.contents == NULL && max_contents_size != 0) + || (aout_info.relocs == NULL && max_relocs_size != 0) + || (aout_info.symbol_map == NULL && max_sym_count != 0) + || aout_info.output_syms == NULL) + goto error_return; + + /* If we have a symbol named __DYNAMIC, force it out now. This is + required by SunOS. Doing this here rather than in sunos.c is a + hack, but it's easier than exporting everything which would be + needed. */ + { + struct aout_link_hash_entry *h; + + h = aout_link_hash_lookup (aout_hash_table (info), "__DYNAMIC", + false, false, false); + if (h != NULL) + aout_link_write_other_symbol (h, &aout_info); + } + + /* The most time efficient way to do the link would be to read all + the input object files into memory and then sort out the + information into the output file. Unfortunately, that will + probably use too much memory. Another method would be to step + through everything that composes the text section and write it + out, and then everything that composes the data section and write + it out, and then write out the relocs, and then write out the + symbols. Unfortunately, that requires reading stuff from each + input file several times, and we will not be able to keep all the + input files open simultaneously, and reopening them will be slow. + + What we do is basically process one input file at a time. We do + everything we need to do with an input file once--copy over the + section contents, handle the relocation information, and write + out the symbols--and then we throw away the information we read + from it. This approach requires a lot of lseeks of the output + file, which is unfortunate but still faster than reopening a lot + of files. + + We use the output_has_begun field of the input BFDs to see + whether we have already handled it. */ + for (sub = info->input_bfds; sub != (bfd *) NULL; sub = sub->link_next) + sub->output_has_begun = false; + + /* Mark all sections which are to be included in the link. This + will normally be every section. We need to do this so that we + can identify any sections which the linker has decided to not + include. */ + for (o = abfd->sections; o != NULL; o = o->next) + { + for (p = o->link_order_head; p != NULL; p = p->next) + { + if (p->type == bfd_indirect_link_order) + p->u.indirect.section->linker_mark = true; + } + } + + have_link_order_relocs = false; + for (o = abfd->sections; o != (asection *) NULL; o = o->next) + { + for (p = o->link_order_head; + p != (struct bfd_link_order *) NULL; + p = p->next) + { + if (p->type == bfd_indirect_link_order + && (bfd_get_flavour (p->u.indirect.section->owner) + == bfd_target_aout_flavour)) + { + bfd *input_bfd; + + input_bfd = p->u.indirect.section->owner; + if (! input_bfd->output_has_begun) + { + if (! aout_link_input_bfd (&aout_info, input_bfd)) + goto error_return; + input_bfd->output_has_begun = true; + } + } + else if (p->type == bfd_section_reloc_link_order + || p->type == bfd_symbol_reloc_link_order) + { + /* These are handled below. */ + have_link_order_relocs = true; + } + else + { + if (! _bfd_default_link_order (abfd, info, o, p)) + goto error_return; + } + } + } + + /* Write out any symbols that we have not already written out. */ + aout_link_hash_traverse (aout_hash_table (info), + aout_link_write_other_symbol, + (PTR) &aout_info); + + /* Now handle any relocs we were asked to create by the linker. + These did not come from any input file. We must do these after + we have written out all the symbols, so that we know the symbol + indices to use. */ + if (have_link_order_relocs) + { + for (o = abfd->sections; o != (asection *) NULL; o = o->next) + { + for (p = o->link_order_head; + p != (struct bfd_link_order *) NULL; + p = p->next) + { + if (p->type == bfd_section_reloc_link_order + || p->type == bfd_symbol_reloc_link_order) + { + if (! aout_link_reloc_link_order (&aout_info, o, p)) + goto error_return; + } + } + } + } + + if (aout_info.contents != NULL) + { + free (aout_info.contents); + aout_info.contents = NULL; + } + if (aout_info.relocs != NULL) + { + free (aout_info.relocs); + aout_info.relocs = NULL; + } + if (aout_info.symbol_map != NULL) + { + free (aout_info.symbol_map); + aout_info.symbol_map = NULL; + } + if (aout_info.output_syms != NULL) + { + free (aout_info.output_syms); + aout_info.output_syms = NULL; + } + if (includes_hash_initialized) + { + bfd_hash_table_free (&aout_info.includes.root); + includes_hash_initialized = false; + } + + /* Finish up any dynamic linking we may be doing. */ + if (aout_backend_info (abfd)->finish_dynamic_link != NULL) + { + if (! (*aout_backend_info (abfd)->finish_dynamic_link) (abfd, info)) + goto error_return; + } + + /* Update the header information. */ + abfd->symcount = obj_aout_external_sym_count (abfd); + exec_hdr (abfd)->a_syms = abfd->symcount * EXTERNAL_NLIST_SIZE; + obj_str_filepos (abfd) = obj_sym_filepos (abfd) + exec_hdr (abfd)->a_syms; + obj_textsec (abfd)->reloc_count = + exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd); + obj_datasec (abfd)->reloc_count = + exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd); + + /* Write out the string table, unless there are no symbols. */ + if (abfd->symcount > 0) + { + if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0 + || ! emit_stringtab (abfd, aout_info.strtab)) + goto error_return; + } + else if (obj_textsec (abfd)->reloc_count == 0 + && obj_datasec (abfd)->reloc_count == 0) + { + bfd_byte b; + + b = 0; + if (bfd_seek (abfd, + (obj_datasec (abfd)->filepos + + exec_hdr (abfd)->a_data + - 1), + SEEK_SET) != 0 + || bfd_write (&b, 1, 1, abfd) != 1) + goto error_return; + } + + return true; + + error_return: + if (aout_info.contents != NULL) + free (aout_info.contents); + if (aout_info.relocs != NULL) + free (aout_info.relocs); + if (aout_info.symbol_map != NULL) + free (aout_info.symbol_map); + if (aout_info.output_syms != NULL) + free (aout_info.output_syms); + if (includes_hash_initialized) + bfd_hash_table_free (&aout_info.includes.root); + return false; +} + +/* Link an a.out input BFD into the output file. */ + +static boolean +aout_link_input_bfd (finfo, input_bfd) + struct aout_final_link_info *finfo; + bfd *input_bfd; +{ + bfd_size_type sym_count; + + BFD_ASSERT (bfd_get_format (input_bfd) == bfd_object); + + /* If this is a dynamic object, it may need special handling. */ + if ((input_bfd->flags & DYNAMIC) != 0 + && aout_backend_info (input_bfd)->link_dynamic_object != NULL) + { + return ((*aout_backend_info (input_bfd)->link_dynamic_object) + (finfo->info, input_bfd)); + } + + /* Get the symbols. We probably have them already, unless + finfo->info->keep_memory is false. */ + if (! aout_get_external_symbols (input_bfd)) + return false; + + sym_count = obj_aout_external_sym_count (input_bfd); + + /* Write out the symbols and get a map of the new indices. The map + is placed into finfo->symbol_map. */ + if (! aout_link_write_symbols (finfo, input_bfd)) + return false; + + /* Relocate and write out the sections. These functions use the + symbol map created by aout_link_write_symbols. The linker_mark + field will be set if these sections are to be included in the + link, which will normally be the case. */ + if (obj_textsec (input_bfd)->linker_mark) + { + if (! aout_link_input_section (finfo, input_bfd, + obj_textsec (input_bfd), + &finfo->treloff, + exec_hdr (input_bfd)->a_trsize)) + return false; + } + if (obj_datasec (input_bfd)->linker_mark) + { + if (! aout_link_input_section (finfo, input_bfd, + obj_datasec (input_bfd), + &finfo->dreloff, + exec_hdr (input_bfd)->a_drsize)) + return false; + } + + /* If we are not keeping memory, we don't need the symbols any + longer. We still need them if we are keeping memory, because the + strings in the hash table point into them. */ + if (! finfo->info->keep_memory) + { + if (! aout_link_free_symbols (input_bfd)) + return false; + } + + return true; +} + +/* Adjust and write out the symbols for an a.out file. Set the new + symbol indices into a symbol_map. */ + +static boolean +aout_link_write_symbols (finfo, input_bfd) + struct aout_final_link_info *finfo; + bfd *input_bfd; +{ + bfd *output_bfd; + bfd_size_type sym_count; + char *strings; + enum bfd_link_strip strip; + enum bfd_link_discard discard; + struct external_nlist *outsym; + bfd_size_type strtab_index; + register struct external_nlist *sym; + struct external_nlist *sym_end; + struct aout_link_hash_entry **sym_hash; + int *symbol_map; + boolean pass; + boolean skip_next; + + output_bfd = finfo->output_bfd; + sym_count = obj_aout_external_sym_count (input_bfd); + strings = obj_aout_external_strings (input_bfd); + strip = finfo->info->strip; + discard = finfo->info->discard; + outsym = finfo->output_syms; + + /* First write out a symbol for this object file, unless we are + discarding such symbols. */ + if (strip != strip_all + && (strip != strip_some + || bfd_hash_lookup (finfo->info->keep_hash, input_bfd->filename, + false, false) != NULL) + && discard != discard_all) + { + bfd_h_put_8 (output_bfd, N_TEXT, outsym->e_type); + bfd_h_put_8 (output_bfd, 0, outsym->e_other); + bfd_h_put_16 (output_bfd, (bfd_vma) 0, outsym->e_desc); + strtab_index = add_to_stringtab (output_bfd, finfo->strtab, + input_bfd->filename, false); + if (strtab_index == (bfd_size_type) -1) + return false; + PUT_WORD (output_bfd, strtab_index, outsym->e_strx); + PUT_WORD (output_bfd, + (bfd_get_section_vma (output_bfd, + obj_textsec (input_bfd)->output_section) + + obj_textsec (input_bfd)->output_offset), + outsym->e_value); + ++obj_aout_external_sym_count (output_bfd); + ++outsym; + } + + pass = false; + skip_next = false; + sym = obj_aout_external_syms (input_bfd); + sym_end = sym + sym_count; + sym_hash = obj_aout_sym_hashes (input_bfd); + symbol_map = finfo->symbol_map; + memset (symbol_map, 0, sym_count * sizeof *symbol_map); + for (; sym < sym_end; sym++, sym_hash++, symbol_map++) + { + const char *name; + int type; + struct aout_link_hash_entry *h; + boolean skip; + asection *symsec; + bfd_vma val = 0; + boolean copy; + + /* We set *symbol_map to 0 above for all symbols. If it has + already been set to -1 for this symbol, it means that we are + discarding it because it appears in a duplicate header file. + See the N_BINCL code below. */ + if (*symbol_map == -1) + continue; + + /* Initialize *symbol_map to -1, which means that the symbol was + not copied into the output file. We will change it later if + we do copy the symbol over. */ + *symbol_map = -1; + + type = bfd_h_get_8 (input_bfd, sym->e_type); + name = strings + GET_WORD (input_bfd, sym->e_strx); + + h = NULL; + + if (pass) + { + /* Pass this symbol through. It is the target of an + indirect or warning symbol. */ + val = GET_WORD (input_bfd, sym->e_value); + pass = false; + } + else if (skip_next) + { + /* Skip this symbol, which is the target of an indirect + symbol that we have changed to no longer be an indirect + symbol. */ + skip_next = false; + continue; + } + else + { + struct aout_link_hash_entry *hresolve; + + /* We have saved the hash table entry for this symbol, if + there is one. Note that we could just look it up again + in the hash table, provided we first check that it is an + external symbol. */ + h = *sym_hash; + + /* Use the name from the hash table, in case the symbol was + wrapped. */ + if (h != NULL) + name = h->root.root.string; + + /* If this is an indirect or warning symbol, then change + hresolve to the base symbol. We also change *sym_hash so + that the relocation routines relocate against the real + symbol. */ + hresolve = h; + if (h != (struct aout_link_hash_entry *) NULL + && (h->root.type == bfd_link_hash_indirect + || h->root.type == bfd_link_hash_warning)) + { + hresolve = (struct aout_link_hash_entry *) h->root.u.i.link; + while (hresolve->root.type == bfd_link_hash_indirect + || hresolve->root.type == bfd_link_hash_warning) + hresolve = ((struct aout_link_hash_entry *) + hresolve->root.u.i.link); + *sym_hash = hresolve; + } + + /* If the symbol has already been written out, skip it. */ + if (h != (struct aout_link_hash_entry *) NULL + && h->root.type != bfd_link_hash_warning + && h->written) + { + if ((type & N_TYPE) == N_INDR + || type == N_WARNING) + skip_next = true; + *symbol_map = h->indx; + continue; + } + + /* See if we are stripping this symbol. */ + skip = false; + switch (strip) + { + case strip_none: + break; + case strip_debugger: + if ((type & N_STAB) != 0) + skip = true; + break; + case strip_some: + if (bfd_hash_lookup (finfo->info->keep_hash, name, false, false) + == NULL) + skip = true; + break; + case strip_all: + skip = true; + break; + } + if (skip) + { + if (h != (struct aout_link_hash_entry *) NULL) + h->written = true; + continue; + } + + /* Get the value of the symbol. */ + if ((type & N_TYPE) == N_TEXT + || type == N_WEAKT) + symsec = obj_textsec (input_bfd); + else if ((type & N_TYPE) == N_DATA + || type == N_WEAKD) + symsec = obj_datasec (input_bfd); + else if ((type & N_TYPE) == N_BSS + || type == N_WEAKB) + symsec = obj_bsssec (input_bfd); + else if ((type & N_TYPE) == N_ABS + || type == N_WEAKA) + symsec = bfd_abs_section_ptr; + else if (((type & N_TYPE) == N_INDR + && (hresolve == (struct aout_link_hash_entry *) NULL + || (hresolve->root.type != bfd_link_hash_defined + && hresolve->root.type != bfd_link_hash_defweak + && hresolve->root.type != bfd_link_hash_common))) + || type == N_WARNING) + { + /* Pass the next symbol through unchanged. The + condition above for indirect symbols is so that if + the indirect symbol was defined, we output it with + the correct definition so the debugger will + understand it. */ + pass = true; + val = GET_WORD (input_bfd, sym->e_value); + symsec = NULL; + } + else if ((type & N_STAB) != 0) + { + val = GET_WORD (input_bfd, sym->e_value); + symsec = NULL; + } + else + { + /* If we get here with an indirect symbol, it means that + we are outputting it with a real definition. In such + a case we do not want to output the next symbol, + which is the target of the indirection. */ + if ((type & N_TYPE) == N_INDR) + skip_next = true; + + symsec = NULL; + + /* We need to get the value from the hash table. We use + hresolve so that if we have defined an indirect + symbol we output the final definition. */ + if (h == (struct aout_link_hash_entry *) NULL) + { + switch (type & N_TYPE) + { + case N_SETT: + symsec = obj_textsec (input_bfd); + break; + case N_SETD: + symsec = obj_datasec (input_bfd); + break; + case N_SETB: + symsec = obj_bsssec (input_bfd); + break; + case N_SETA: + symsec = bfd_abs_section_ptr; + break; + default: + val = 0; + break; + } + } + else if (hresolve->root.type == bfd_link_hash_defined + || hresolve->root.type == bfd_link_hash_defweak) + { + asection *input_section; + asection *output_section; + + /* This case usually means a common symbol which was + turned into a defined symbol. */ + input_section = hresolve->root.u.def.section; + output_section = input_section->output_section; + BFD_ASSERT (bfd_is_abs_section (output_section) + || output_section->owner == output_bfd); + val = (hresolve->root.u.def.value + + bfd_get_section_vma (output_bfd, output_section) + + input_section->output_offset); + + /* Get the correct type based on the section. If + this is a constructed set, force it to be + globally visible. */ + if (type == N_SETT + || type == N_SETD + || type == N_SETB + || type == N_SETA) + type |= N_EXT; + + type &=~ N_TYPE; + + if (output_section == obj_textsec (output_bfd)) + type |= (hresolve->root.type == bfd_link_hash_defined + ? N_TEXT + : N_WEAKT); + else if (output_section == obj_datasec (output_bfd)) + type |= (hresolve->root.type == bfd_link_hash_defined + ? N_DATA + : N_WEAKD); + else if (output_section == obj_bsssec (output_bfd)) + type |= (hresolve->root.type == bfd_link_hash_defined + ? N_BSS + : N_WEAKB); + else + type |= (hresolve->root.type == bfd_link_hash_defined + ? N_ABS + : N_WEAKA); + } + else if (hresolve->root.type == bfd_link_hash_common) + val = hresolve->root.u.c.size; + else if (hresolve->root.type == bfd_link_hash_undefweak) + { + val = 0; + type = N_WEAKU; + } + else + val = 0; + } + if (symsec != (asection *) NULL) + val = (symsec->output_section->vma + + symsec->output_offset + + (GET_WORD (input_bfd, sym->e_value) + - symsec->vma)); + + /* If this is a global symbol set the written flag, and if + it is a local symbol see if we should discard it. */ + if (h != (struct aout_link_hash_entry *) NULL) + { + h->written = true; + h->indx = obj_aout_external_sym_count (output_bfd); + } + else if ((type & N_TYPE) != N_SETT + && (type & N_TYPE) != N_SETD + && (type & N_TYPE) != N_SETB + && (type & N_TYPE) != N_SETA) + { + switch (discard) + { + case discard_none: + break; + case discard_l: + if ((type & N_STAB) == 0 + && bfd_is_local_label_name (input_bfd, name)) + skip = true; + break; + case discard_all: + skip = true; + break; + } + if (skip) + { + pass = false; + continue; + } + } + + /* An N_BINCL symbol indicates the start of the stabs + entries for a header file. We need to scan ahead to the + next N_EINCL symbol, ignoring nesting, adding up all the + characters in the symbol names, not including the file + numbers in types (the first number after an open + parenthesis). */ + if (type == N_BINCL) + { + struct external_nlist *incl_sym; + int nest; + struct aout_link_includes_entry *incl_entry; + struct aout_link_includes_totals *t; + + val = 0; + nest = 0; + for (incl_sym = sym + 1; incl_sym < sym_end; incl_sym++) + { + int incl_type; + + incl_type = bfd_h_get_8 (input_bfd, incl_sym->e_type); + if (incl_type == N_EINCL) + { + if (nest == 0) + break; + --nest; + } + else if (incl_type == N_BINCL) + ++nest; + else if (nest == 0) + { + const char *s; + + s = strings + GET_WORD (input_bfd, incl_sym->e_strx); + for (; *s != '\0'; s++) + { + val += *s; + if (*s == '(') + { + /* Skip the file number. */ + ++s; + while (isdigit ((unsigned char) *s)) + ++s; + --s; + } + } + } + } + + /* If we have already included a header file with the + same value, then replace this one with an N_EXCL + symbol. */ + copy = ! finfo->info->keep_memory; + incl_entry = aout_link_includes_lookup (&finfo->includes, + name, true, copy); + if (incl_entry == NULL) + return false; + for (t = incl_entry->totals; t != NULL; t = t->next) + if (t->total == val) + break; + if (t == NULL) + { + /* This is the first time we have seen this header + file with this set of stabs strings. */ + t = ((struct aout_link_includes_totals *) + bfd_hash_allocate (&finfo->includes.root, + sizeof *t)); + if (t == NULL) + return false; + t->total = val; + t->next = incl_entry->totals; + incl_entry->totals = t; + } + else + { + int *incl_map; + + /* This is a duplicate header file. We must change + it to be an N_EXCL entry, and mark all the + included symbols to prevent outputting them. */ + type = N_EXCL; + + nest = 0; + for (incl_sym = sym + 1, incl_map = symbol_map + 1; + incl_sym < sym_end; + incl_sym++, incl_map++) + { + int incl_type; + + incl_type = bfd_h_get_8 (input_bfd, incl_sym->e_type); + if (incl_type == N_EINCL) + { + if (nest == 0) + { + *incl_map = -1; + break; + } + --nest; + } + else if (incl_type == N_BINCL) + ++nest; + else if (nest == 0) + *incl_map = -1; + } + } + } + } + + /* Copy this symbol into the list of symbols we are going to + write out. */ + bfd_h_put_8 (output_bfd, type, outsym->e_type); + bfd_h_put_8 (output_bfd, bfd_h_get_8 (input_bfd, sym->e_other), + outsym->e_other); + bfd_h_put_16 (output_bfd, bfd_h_get_16 (input_bfd, sym->e_desc), + outsym->e_desc); + copy = false; + if (! finfo->info->keep_memory) + { + /* name points into a string table which we are going to + free. If there is a hash table entry, use that string. + Otherwise, copy name into memory. */ + if (h != (struct aout_link_hash_entry *) NULL) + name = h->root.root.string; + else + copy = true; + } + strtab_index = add_to_stringtab (output_bfd, finfo->strtab, + name, copy); + if (strtab_index == (bfd_size_type) -1) + return false; + PUT_WORD (output_bfd, strtab_index, outsym->e_strx); + PUT_WORD (output_bfd, val, outsym->e_value); + *symbol_map = obj_aout_external_sym_count (output_bfd); + ++obj_aout_external_sym_count (output_bfd); + ++outsym; + } + + /* Write out the output symbols we have just constructed. */ + if (outsym > finfo->output_syms) + { + bfd_size_type outsym_count; + + if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0) + return false; + outsym_count = outsym - finfo->output_syms; + if (bfd_write ((PTR) finfo->output_syms, + (bfd_size_type) EXTERNAL_NLIST_SIZE, + (bfd_size_type) outsym_count, output_bfd) + != outsym_count * EXTERNAL_NLIST_SIZE) + return false; + finfo->symoff += outsym_count * EXTERNAL_NLIST_SIZE; + } + + return true; +} + +/* Write out a symbol that was not associated with an a.out input + object. */ + +static boolean +aout_link_write_other_symbol (h, data) + struct aout_link_hash_entry *h; + PTR data; +{ + struct aout_final_link_info *finfo = (struct aout_final_link_info *) data; + bfd *output_bfd; + int type; + bfd_vma val; + struct external_nlist outsym; + bfd_size_type indx; + + output_bfd = finfo->output_bfd; + + if (aout_backend_info (output_bfd)->write_dynamic_symbol != NULL) + { + if (! ((*aout_backend_info (output_bfd)->write_dynamic_symbol) + (output_bfd, finfo->info, h))) + { + /* FIXME: No way to handle errors. */ + abort (); + } + } + + if (h->written) + return true; + + h->written = true; + + /* An indx of -2 means the symbol must be written. */ + if (h->indx != -2 + && (finfo->info->strip == strip_all + || (finfo->info->strip == strip_some + && bfd_hash_lookup (finfo->info->keep_hash, h->root.root.string, + false, false) == NULL))) + return true; + + switch (h->root.type) + { + default: + abort (); + /* Avoid variable not initialized warnings. */ + return true; + case bfd_link_hash_new: + /* This can happen for set symbols when sets are not being + built. */ + return true; + case bfd_link_hash_undefined: + type = N_UNDF | N_EXT; + val = 0; + break; + case bfd_link_hash_defined: + case bfd_link_hash_defweak: + { + asection *sec; + + sec = h->root.u.def.section->output_section; + BFD_ASSERT (bfd_is_abs_section (sec) + || sec->owner == output_bfd); + if (sec == obj_textsec (output_bfd)) + type = h->root.type == bfd_link_hash_defined ? N_TEXT : N_WEAKT; + else if (sec == obj_datasec (output_bfd)) + type = h->root.type == bfd_link_hash_defined ? N_DATA : N_WEAKD; + else if (sec == obj_bsssec (output_bfd)) + type = h->root.type == bfd_link_hash_defined ? N_BSS : N_WEAKB; + else + type = h->root.type == bfd_link_hash_defined ? N_ABS : N_WEAKA; + type |= N_EXT; + val = (h->root.u.def.value + + sec->vma + + h->root.u.def.section->output_offset); + } + break; + case bfd_link_hash_common: + type = N_UNDF | N_EXT; + val = h->root.u.c.size; + break; + case bfd_link_hash_undefweak: + type = N_WEAKU; + val = 0; + case bfd_link_hash_indirect: + case bfd_link_hash_warning: + /* FIXME: Ignore these for now. The circumstances under which + they should be written out are not clear to me. */ + return true; + } + + bfd_h_put_8 (output_bfd, type, outsym.e_type); + bfd_h_put_8 (output_bfd, 0, outsym.e_other); + bfd_h_put_16 (output_bfd, 0, outsym.e_desc); + indx = add_to_stringtab (output_bfd, finfo->strtab, h->root.root.string, + false); + if (indx == (bfd_size_type) -1) + { + /* FIXME: No way to handle errors. */ + abort (); + } + PUT_WORD (output_bfd, indx, outsym.e_strx); + PUT_WORD (output_bfd, val, outsym.e_value); + + if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0 + || bfd_write ((PTR) &outsym, (bfd_size_type) EXTERNAL_NLIST_SIZE, + (bfd_size_type) 1, output_bfd) != EXTERNAL_NLIST_SIZE) + { + /* FIXME: No way to handle errors. */ + abort (); + } + + finfo->symoff += EXTERNAL_NLIST_SIZE; + h->indx = obj_aout_external_sym_count (output_bfd); + ++obj_aout_external_sym_count (output_bfd); + + return true; +} + +/* Link an a.out section into the output file. */ + +static boolean +aout_link_input_section (finfo, input_bfd, input_section, reloff_ptr, + rel_size) + struct aout_final_link_info *finfo; + bfd *input_bfd; + asection *input_section; + file_ptr *reloff_ptr; + bfd_size_type rel_size; +{ + bfd_size_type input_size; + PTR relocs; + + /* Get the section contents. */ + input_size = bfd_section_size (input_bfd, input_section); + if (! bfd_get_section_contents (input_bfd, input_section, + (PTR) finfo->contents, + (file_ptr) 0, input_size)) + return false; + + /* Read in the relocs if we haven't already done it. */ + if (aout_section_data (input_section) != NULL + && aout_section_data (input_section)->relocs != NULL) + relocs = aout_section_data (input_section)->relocs; + else + { + relocs = finfo->relocs; + if (rel_size > 0) + { + if (bfd_seek (input_bfd, input_section->rel_filepos, SEEK_SET) != 0 + || bfd_read (relocs, 1, rel_size, input_bfd) != rel_size) + return false; + } + } + + /* Relocate the section contents. */ + if (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE) + { + if (! aout_link_input_section_std (finfo, input_bfd, input_section, + (struct reloc_std_external *) relocs, + rel_size, finfo->contents)) + return false; + } + else + { + if (! aout_link_input_section_ext (finfo, input_bfd, input_section, + (struct reloc_ext_external *) relocs, + rel_size, finfo->contents)) + return false; + } + + /* Write out the section contents. */ + if (! bfd_set_section_contents (finfo->output_bfd, + input_section->output_section, + (PTR) finfo->contents, + input_section->output_offset, + input_size)) + return false; + + /* If we are producing relocateable output, the relocs were + modified, and we now write them out. */ + if (finfo->info->relocateable && rel_size > 0) + { + if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0) + return false; + if (bfd_write (relocs, (bfd_size_type) 1, rel_size, finfo->output_bfd) + != rel_size) + return false; + *reloff_ptr += rel_size; + + /* Assert that the relocs have not run into the symbols, and + that if these are the text relocs they have not run into the + data relocs. */ + BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd) + && (reloff_ptr != &finfo->treloff + || (*reloff_ptr + <= obj_datasec (finfo->output_bfd)->rel_filepos))); + } + + return true; +} + +/* Get the section corresponding to a reloc index. */ + +static INLINE asection * +aout_reloc_index_to_section (abfd, indx) + bfd *abfd; + int indx; +{ + switch (indx & N_TYPE) + { + case N_TEXT: + return obj_textsec (abfd); + case N_DATA: + return obj_datasec (abfd); + case N_BSS: + return obj_bsssec (abfd); + case N_ABS: + case N_UNDF: + return bfd_abs_section_ptr; + default: + abort (); + } +} + +/* Relocate an a.out section using standard a.out relocs. */ + +static boolean +aout_link_input_section_std (finfo, input_bfd, input_section, relocs, + rel_size, contents) + struct aout_final_link_info *finfo; + bfd *input_bfd; + asection *input_section; + struct reloc_std_external *relocs; + bfd_size_type rel_size; + bfd_byte *contents; +{ + boolean (*check_dynamic_reloc) PARAMS ((struct bfd_link_info *, + bfd *, asection *, + struct aout_link_hash_entry *, + PTR, bfd_byte *, boolean *, + bfd_vma *)); + bfd *output_bfd; + boolean relocateable; + struct external_nlist *syms; + char *strings; + struct aout_link_hash_entry **sym_hashes; + int *symbol_map; + bfd_size_type reloc_count; + register struct reloc_std_external *rel; + struct reloc_std_external *rel_end; + + output_bfd = finfo->output_bfd; + check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc; + + BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE); + BFD_ASSERT (input_bfd->xvec->header_byteorder + == output_bfd->xvec->header_byteorder); + + relocateable = finfo->info->relocateable; + syms = obj_aout_external_syms (input_bfd); + strings = obj_aout_external_strings (input_bfd); + sym_hashes = obj_aout_sym_hashes (input_bfd); + symbol_map = finfo->symbol_map; + + reloc_count = rel_size / RELOC_STD_SIZE; + rel = relocs; + rel_end = rel + reloc_count; + for (; rel < rel_end; rel++) + { + bfd_vma r_addr; + int r_index; + int r_extern; + int r_pcrel; + int r_baserel = 0; + reloc_howto_type *howto; + struct aout_link_hash_entry *h = NULL; + bfd_vma relocation; + bfd_reloc_status_type r; + + r_addr = GET_SWORD (input_bfd, rel->r_address); + +#ifdef MY_reloc_howto + howto = MY_reloc_howto(input_bfd, rel, r_index, r_extern, r_pcrel); +#else + { + int r_jmptable; + int r_relative; + int r_length; + unsigned int howto_idx; + + if (bfd_header_big_endian (input_bfd)) + { + r_index = ((rel->r_index[0] << 16) + | (rel->r_index[1] << 8) + | rel->r_index[2]); + r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_BIG)); + r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_BIG)); + r_baserel = (0 != (rel->r_type[0] & RELOC_STD_BITS_BASEREL_BIG)); + r_jmptable= (0 != (rel->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG)); + r_relative= (0 != (rel->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG)); + r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_BIG) + >> RELOC_STD_BITS_LENGTH_SH_BIG); + } + else + { + r_index = ((rel->r_index[2] << 16) + | (rel->r_index[1] << 8) + | rel->r_index[0]); + r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE)); + r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE)); + r_baserel = (0 != (rel->r_type[0] + & RELOC_STD_BITS_BASEREL_LITTLE)); + r_jmptable= (0 != (rel->r_type[0] + & RELOC_STD_BITS_JMPTABLE_LITTLE)); + r_relative= (0 != (rel->r_type[0] + & RELOC_STD_BITS_RELATIVE_LITTLE)); + r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE) + >> RELOC_STD_BITS_LENGTH_SH_LITTLE); + } + + howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel + + 16 * r_jmptable + 32 * r_relative); + BFD_ASSERT (howto_idx < TABLE_SIZE (howto_table_std)); + howto = howto_table_std + howto_idx; + } +#endif + + if (relocateable) + { + /* We are generating a relocateable output file, and must + modify the reloc accordingly. */ + if (r_extern) + { + /* If we know the symbol this relocation is against, + convert it into a relocation against a section. This + is what the native linker does. */ + h = sym_hashes[r_index]; + if (h != (struct aout_link_hash_entry *) NULL + && (h->root.type == bfd_link_hash_defined + || h->root.type == bfd_link_hash_defweak)) + { + asection *output_section; + + /* Change the r_extern value. */ + if (bfd_header_big_endian (output_bfd)) + rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_BIG; + else + rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_LITTLE; + + /* Compute a new r_index. */ + output_section = h->root.u.def.section->output_section; + if (output_section == obj_textsec (output_bfd)) + r_index = N_TEXT; + else if (output_section == obj_datasec (output_bfd)) + r_index = N_DATA; + else if (output_section == obj_bsssec (output_bfd)) + r_index = N_BSS; + else + r_index = N_ABS; + + /* Add the symbol value and the section VMA to the + addend stored in the contents. */ + relocation = (h->root.u.def.value + + output_section->vma + + h->root.u.def.section->output_offset); + } + else + { + /* We must change r_index according to the symbol + map. */ + r_index = symbol_map[r_index]; + + if (r_index == -1) + { + if (h != NULL) + { + /* We decided to strip this symbol, but it + turns out that we can't. Note that we + lose the other and desc information here. + I don't think that will ever matter for a + global symbol. */ + if (h->indx < 0) + { + h->indx = -2; + h->written = false; + if (! aout_link_write_other_symbol (h, + (PTR) finfo)) + return false; + } + r_index = h->indx; + } + else + { + const char *name; + + name = strings + GET_WORD (input_bfd, + syms[r_index].e_strx); + if (! ((*finfo->info->callbacks->unattached_reloc) + (finfo->info, name, input_bfd, input_section, + r_addr))) + return false; + r_index = 0; + } + } + + relocation = 0; + } + + /* Write out the new r_index value. */ + if (bfd_header_big_endian (output_bfd)) + { + rel->r_index[0] = r_index >> 16; + rel->r_index[1] = r_index >> 8; + rel->r_index[2] = r_index; + } + else + { + rel->r_index[2] = r_index >> 16; + rel->r_index[1] = r_index >> 8; + rel->r_index[0] = r_index; + } + } + else + { + asection *section; + + /* This is a relocation against a section. We must + adjust by the amount that the section moved. */ + section = aout_reloc_index_to_section (input_bfd, r_index); + relocation = (section->output_section->vma + + section->output_offset + - section->vma); + } + + /* Change the address of the relocation. */ + PUT_WORD (output_bfd, + r_addr + input_section->output_offset, + rel->r_address); + + /* Adjust a PC relative relocation by removing the reference + to the original address in the section and including the + reference to the new address. */ + if (r_pcrel) + relocation -= (input_section->output_section->vma + + input_section->output_offset + - input_section->vma); + +#ifdef MY_relocatable_reloc + MY_relocatable_reloc (howto, output_bfd, rel, relocation, r_addr); +#endif + + if (relocation == 0) + r = bfd_reloc_ok; + else + r = MY_relocate_contents (howto, + input_bfd, relocation, + contents + r_addr); + } + else + { + boolean hundef; + + /* We are generating an executable, and must do a full + relocation. */ + hundef = false; + + if (r_extern) + { + h = sym_hashes[r_index]; + + if (h != (struct aout_link_hash_entry *) NULL + && (h->root.type == bfd_link_hash_defined + || h->root.type == bfd_link_hash_defweak)) + { + relocation = (h->root.u.def.value + + h->root.u.def.section->output_section->vma + + h->root.u.def.section->output_offset); + } + else if (h != (struct aout_link_hash_entry *) NULL + && h->root.type == bfd_link_hash_undefweak) + relocation = 0; + else + { + hundef = true; + relocation = 0; + } + } + else + { + asection *section; + + section = aout_reloc_index_to_section (input_bfd, r_index); + relocation = (section->output_section->vma + + section->output_offset + - section->vma); + if (r_pcrel) + relocation += input_section->vma; + } + + if (check_dynamic_reloc != NULL) + { + boolean skip; + + if (! ((*check_dynamic_reloc) + (finfo->info, input_bfd, input_section, h, + (PTR) rel, contents, &skip, &relocation))) + return false; + if (skip) + continue; + } + + /* Now warn if a global symbol is undefined. We could not + do this earlier, because check_dynamic_reloc might want + to skip this reloc. */ + if (hundef && ! finfo->info->shared && ! r_baserel) + { + const char *name; + + if (h != NULL) + name = h->root.root.string; + else + name = strings + GET_WORD (input_bfd, syms[r_index].e_strx); + if (! ((*finfo->info->callbacks->undefined_symbol) + (finfo->info, name, input_bfd, input_section, r_addr))) + return false; + } + + r = MY_final_link_relocate (howto, + input_bfd, input_section, + contents, r_addr, relocation, + (bfd_vma) 0); + } + + if (r != bfd_reloc_ok) + { + switch (r) + { + default: + case bfd_reloc_outofrange: + abort (); + case bfd_reloc_overflow: + { + const char *name; + + if (h != NULL) + name = h->root.root.string; + else if (r_extern) + name = strings + GET_WORD (input_bfd, + syms[r_index].e_strx); + else + { + asection *s; + + s = aout_reloc_index_to_section (input_bfd, r_index); + name = bfd_section_name (input_bfd, s); + } + if (! ((*finfo->info->callbacks->reloc_overflow) + (finfo->info, name, howto->name, + (bfd_vma) 0, input_bfd, input_section, r_addr))) + return false; + } + break; + } + } + } + + return true; +} + +/* Relocate an a.out section using extended a.out relocs. */ + +static boolean +aout_link_input_section_ext (finfo, input_bfd, input_section, relocs, + rel_size, contents) + struct aout_final_link_info *finfo; + bfd *input_bfd; + asection *input_section; + struct reloc_ext_external *relocs; + bfd_size_type rel_size; + bfd_byte *contents; +{ + boolean (*check_dynamic_reloc) PARAMS ((struct bfd_link_info *, + bfd *, asection *, + struct aout_link_hash_entry *, + PTR, bfd_byte *, boolean *, + bfd_vma *)); + bfd *output_bfd; + boolean relocateable; + struct external_nlist *syms; + char *strings; + struct aout_link_hash_entry **sym_hashes; + int *symbol_map; + bfd_size_type reloc_count; + register struct reloc_ext_external *rel; + struct reloc_ext_external *rel_end; + + output_bfd = finfo->output_bfd; + check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc; + + BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_EXT_SIZE); + BFD_ASSERT (input_bfd->xvec->header_byteorder + == output_bfd->xvec->header_byteorder); + + relocateable = finfo->info->relocateable; + syms = obj_aout_external_syms (input_bfd); + strings = obj_aout_external_strings (input_bfd); + sym_hashes = obj_aout_sym_hashes (input_bfd); + symbol_map = finfo->symbol_map; + + reloc_count = rel_size / RELOC_EXT_SIZE; + rel = relocs; + rel_end = rel + reloc_count; + for (; rel < rel_end; rel++) + { + bfd_vma r_addr; + int r_index; + int r_extern; + unsigned int r_type; + bfd_vma r_addend; + struct aout_link_hash_entry *h = NULL; + asection *r_section = NULL; + bfd_vma relocation; + + r_addr = GET_SWORD (input_bfd, rel->r_address); + + if (bfd_header_big_endian (input_bfd)) + { + r_index = ((rel->r_index[0] << 16) + | (rel->r_index[1] << 8) + | rel->r_index[2]); + r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG)); + r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_BIG) + >> RELOC_EXT_BITS_TYPE_SH_BIG); + } + else + { + r_index = ((rel->r_index[2] << 16) + | (rel->r_index[1] << 8) + | rel->r_index[0]); + r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE)); + r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE) + >> RELOC_EXT_BITS_TYPE_SH_LITTLE); + } + + r_addend = GET_SWORD (input_bfd, rel->r_addend); + + BFD_ASSERT (r_type < TABLE_SIZE (howto_table_ext)); + + if (relocateable) + { + /* We are generating a relocateable output file, and must + modify the reloc accordingly. */ + if (r_extern + || r_type == RELOC_BASE10 + || r_type == RELOC_BASE13 + || r_type == RELOC_BASE22) + { + /* If we know the symbol this relocation is against, + convert it into a relocation against a section. This + is what the native linker does. */ + if (r_type == RELOC_BASE10 + || r_type == RELOC_BASE13 + || r_type == RELOC_BASE22) + h = NULL; + else + h = sym_hashes[r_index]; + if (h != (struct aout_link_hash_entry *) NULL + && (h->root.type == bfd_link_hash_defined + || h->root.type == bfd_link_hash_defweak)) + { + asection *output_section; + + /* Change the r_extern value. */ + if (bfd_header_big_endian (output_bfd)) + rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_BIG; + else + rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_LITTLE; + + /* Compute a new r_index. */ + output_section = h->root.u.def.section->output_section; + if (output_section == obj_textsec (output_bfd)) + r_index = N_TEXT; + else if (output_section == obj_datasec (output_bfd)) + r_index = N_DATA; + else if (output_section == obj_bsssec (output_bfd)) + r_index = N_BSS; + else + r_index = N_ABS; + + /* Add the symbol value and the section VMA to the + addend. */ + relocation = (h->root.u.def.value + + output_section->vma + + h->root.u.def.section->output_offset); + + /* Now RELOCATION is the VMA of the final + destination. If this is a PC relative reloc, + then ADDEND is the negative of the source VMA. + We want to set ADDEND to the difference between + the destination VMA and the source VMA, which + means we must adjust RELOCATION by the change in + the source VMA. This is done below. */ + } + else + { + /* We must change r_index according to the symbol + map. */ + r_index = symbol_map[r_index]; + + if (r_index == -1) + { + if (h != NULL) + { + /* We decided to strip this symbol, but it + turns out that we can't. Note that we + lose the other and desc information here. + I don't think that will ever matter for a + global symbol. */ + if (h->indx < 0) + { + h->indx = -2; + h->written = false; + if (! aout_link_write_other_symbol (h, + (PTR) finfo)) + return false; + } + r_index = h->indx; + } + else + { + const char *name; + + name = strings + GET_WORD (input_bfd, + syms[r_index].e_strx); + if (! ((*finfo->info->callbacks->unattached_reloc) + (finfo->info, name, input_bfd, input_section, + r_addr))) + return false; + r_index = 0; + } + } + + relocation = 0; + + /* If this is a PC relative reloc, then the addend + is the negative of the source VMA. We must + adjust it by the change in the source VMA. This + is done below. */ + } + + /* Write out the new r_index value. */ + if (bfd_header_big_endian (output_bfd)) + { + rel->r_index[0] = r_index >> 16; + rel->r_index[1] = r_index >> 8; + rel->r_index[2] = r_index; + } + else + { + rel->r_index[2] = r_index >> 16; + rel->r_index[1] = r_index >> 8; + rel->r_index[0] = r_index; + } + } + else + { + /* This is a relocation against a section. We must + adjust by the amount that the section moved. */ + r_section = aout_reloc_index_to_section (input_bfd, r_index); + relocation = (r_section->output_section->vma + + r_section->output_offset + - r_section->vma); + + /* If this is a PC relative reloc, then the addend is + the difference in VMA between the destination and the + source. We have just adjusted for the change in VMA + of the destination, so we must also adjust by the + change in VMA of the source. This is done below. */ + } + + /* As described above, we must always adjust a PC relative + reloc by the change in VMA of the source. However, if + pcrel_offset is set, then the addend does not include the + location within the section, in which case we don't need + to adjust anything. */ + if (howto_table_ext[r_type].pc_relative + && ! howto_table_ext[r_type].pcrel_offset) + relocation -= (input_section->output_section->vma + + input_section->output_offset + - input_section->vma); + + /* Change the addend if necessary. */ + if (relocation != 0) + PUT_WORD (output_bfd, r_addend + relocation, rel->r_addend); + + /* Change the address of the relocation. */ + PUT_WORD (output_bfd, + r_addr + input_section->output_offset, + rel->r_address); + } + else + { + boolean hundef; + bfd_reloc_status_type r; + + /* We are generating an executable, and must do a full + relocation. */ + hundef = false; + + if (r_extern) + { + h = sym_hashes[r_index]; + + if (h != (struct aout_link_hash_entry *) NULL + && (h->root.type == bfd_link_hash_defined + || h->root.type == bfd_link_hash_defweak)) + { + relocation = (h->root.u.def.value + + h->root.u.def.section->output_section->vma + + h->root.u.def.section->output_offset); + } + else if (h != (struct aout_link_hash_entry *) NULL + && h->root.type == bfd_link_hash_undefweak) + relocation = 0; + else + { + hundef = true; + relocation = 0; + } + } + else if (r_type == RELOC_BASE10 + || r_type == RELOC_BASE13 + || r_type == RELOC_BASE22) + { + struct external_nlist *sym; + int type; + + /* For base relative relocs, r_index is always an index + into the symbol table, even if r_extern is 0. */ + sym = syms + r_index; + type = bfd_h_get_8 (input_bfd, sym->e_type); + if ((type & N_TYPE) == N_TEXT + || type == N_WEAKT) + r_section = obj_textsec (input_bfd); + else if ((type & N_TYPE) == N_DATA + || type == N_WEAKD) + r_section = obj_datasec (input_bfd); + else if ((type & N_TYPE) == N_BSS + || type == N_WEAKB) + r_section = obj_bsssec (input_bfd); + else if ((type & N_TYPE) == N_ABS + || type == N_WEAKA) + r_section = bfd_abs_section_ptr; + else + abort (); + relocation = (r_section->output_section->vma + + r_section->output_offset + + (GET_WORD (input_bfd, sym->e_value) + - r_section->vma)); + } + else + { + r_section = aout_reloc_index_to_section (input_bfd, r_index); + + /* If this is a PC relative reloc, then R_ADDEND is the + difference between the two vmas, or + old_dest_sec + old_dest_off - (old_src_sec + old_src_off) + where + old_dest_sec == section->vma + and + old_src_sec == input_section->vma + and + old_src_off == r_addr + + _bfd_final_link_relocate expects RELOCATION + + R_ADDEND to be the VMA of the destination minus + r_addr (the minus r_addr is because this relocation + is not pcrel_offset, which is a bit confusing and + should, perhaps, be changed), or + new_dest_sec + where + new_dest_sec == output_section->vma + output_offset + We arrange for this to happen by setting RELOCATION to + new_dest_sec + old_src_sec - old_dest_sec + + If this is not a PC relative reloc, then R_ADDEND is + simply the VMA of the destination, so we set + RELOCATION to the change in the destination VMA, or + new_dest_sec - old_dest_sec + */ + relocation = (r_section->output_section->vma + + r_section->output_offset + - r_section->vma); + if (howto_table_ext[r_type].pc_relative) + relocation += input_section->vma; + } + + if (check_dynamic_reloc != NULL) + { + boolean skip; + + if (! ((*check_dynamic_reloc) + (finfo->info, input_bfd, input_section, h, + (PTR) rel, contents, &skip, &relocation))) + return false; + if (skip) + continue; + } + + /* Now warn if a global symbol is undefined. We could not + do this earlier, because check_dynamic_reloc might want + to skip this reloc. */ + if (hundef + && ! finfo->info->shared + && r_type != RELOC_BASE10 + && r_type != RELOC_BASE13 + && r_type != RELOC_BASE22) + { + const char *name; + + if (h != NULL) + name = h->root.root.string; + else + name = strings + GET_WORD (input_bfd, syms[r_index].e_strx); + if (! ((*finfo->info->callbacks->undefined_symbol) + (finfo->info, name, input_bfd, input_section, r_addr))) + return false; + } + + if (r_type != RELOC_SPARC_REV32) + r = MY_final_link_relocate (howto_table_ext + r_type, + input_bfd, input_section, + contents, r_addr, relocation, + r_addend); + else + { + bfd_vma x; + + x = bfd_get_32 (input_bfd, contents + r_addr); + x = x + relocation + r_addend; + bfd_putl32 (/*input_bfd,*/ x, contents + r_addr); + r = bfd_reloc_ok; + } + + if (r != bfd_reloc_ok) + { + switch (r) + { + default: + case bfd_reloc_outofrange: + abort (); + case bfd_reloc_overflow: + { + const char *name; + + if (h != NULL) + name = h->root.root.string; + else if (r_extern + || r_type == RELOC_BASE10 + || r_type == RELOC_BASE13 + || r_type == RELOC_BASE22) + name = strings + GET_WORD (input_bfd, + syms[r_index].e_strx); + else + { + asection *s; + + s = aout_reloc_index_to_section (input_bfd, r_index); + name = bfd_section_name (input_bfd, s); + } + if (! ((*finfo->info->callbacks->reloc_overflow) + (finfo->info, name, howto_table_ext[r_type].name, + r_addend, input_bfd, input_section, r_addr))) + return false; + } + break; + } + } + } + } + + return true; +} + +/* Handle a link order which is supposed to generate a reloc. */ + +static boolean +aout_link_reloc_link_order (finfo, o, p) + struct aout_final_link_info *finfo; + asection *o; + struct bfd_link_order *p; +{ + struct bfd_link_order_reloc *pr; + int r_index; + int r_extern; + reloc_howto_type *howto; + file_ptr *reloff_ptr; + struct reloc_std_external srel; + struct reloc_ext_external erel; + PTR rel_ptr; + + pr = p->u.reloc.p; + + if (p->type == bfd_section_reloc_link_order) + { + r_extern = 0; + if (bfd_is_abs_section (pr->u.section)) + r_index = N_ABS | N_EXT; + else + { + BFD_ASSERT (pr->u.section->owner == finfo->output_bfd); + r_index = pr->u.section->target_index; + } + } + else + { + struct aout_link_hash_entry *h; + + BFD_ASSERT (p->type == bfd_symbol_reloc_link_order); + r_extern = 1; + h = ((struct aout_link_hash_entry *) + bfd_wrapped_link_hash_lookup (finfo->output_bfd, finfo->info, + pr->u.name, false, false, true)); + if (h != (struct aout_link_hash_entry *) NULL + && h->indx >= 0) + r_index = h->indx; + else if (h != NULL) + { + /* We decided to strip this symbol, but it turns out that we + can't. Note that we lose the other and desc information + here. I don't think that will ever matter for a global + symbol. */ + h->indx = -2; + h->written = false; + if (! aout_link_write_other_symbol (h, (PTR) finfo)) + return false; + r_index = h->indx; + } + else + { + if (! ((*finfo->info->callbacks->unattached_reloc) + (finfo->info, pr->u.name, (bfd *) NULL, + (asection *) NULL, (bfd_vma) 0))) + return false; + r_index = 0; + } + } + + howto = bfd_reloc_type_lookup (finfo->output_bfd, pr->reloc); + if (howto == 0) + { + bfd_set_error (bfd_error_bad_value); + return false; + } + + if (o == obj_textsec (finfo->output_bfd)) + reloff_ptr = &finfo->treloff; + else if (o == obj_datasec (finfo->output_bfd)) + reloff_ptr = &finfo->dreloff; + else + abort (); + + if (obj_reloc_entry_size (finfo->output_bfd) == RELOC_STD_SIZE) + { +#ifdef MY_put_reloc + MY_put_reloc(finfo->output_bfd, r_extern, r_index, p->offset, howto, + &srel); +#else + { + int r_pcrel; + int r_baserel; + int r_jmptable; + int r_relative; + int r_length; + + r_pcrel = howto->pc_relative; + r_baserel = (howto->type & 8) != 0; + r_jmptable = (howto->type & 16) != 0; + r_relative = (howto->type & 32) != 0; + r_length = howto->size; + + PUT_WORD (finfo->output_bfd, p->offset, srel.r_address); + if (bfd_header_big_endian (finfo->output_bfd)) + { + srel.r_index[0] = r_index >> 16; + srel.r_index[1] = r_index >> 8; + srel.r_index[2] = r_index; + srel.r_type[0] = + ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0) + | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0) + | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0) + | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0) + | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0) + | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG)); + } + else + { + srel.r_index[2] = r_index >> 16; + srel.r_index[1] = r_index >> 8; + srel.r_index[0] = r_index; + srel.r_type[0] = + ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0) + | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0) + | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0) + | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0) + | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0) + | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE)); + } + } +#endif + rel_ptr = (PTR) &srel; + + /* We have to write the addend into the object file, since + standard a.out relocs are in place. It would be more + reliable if we had the current contents of the file here, + rather than assuming zeroes, but we can't read the file since + it was opened using bfd_openw. */ + if (pr->addend != 0) + { + bfd_size_type size; + bfd_reloc_status_type r; + bfd_byte *buf; + boolean ok; + + size = bfd_get_reloc_size (howto); + buf = (bfd_byte *) bfd_zmalloc (size); + if (buf == (bfd_byte *) NULL) + return false; + r = MY_relocate_contents (howto, finfo->output_bfd, + pr->addend, buf); + switch (r) + { + case bfd_reloc_ok: + break; + default: + case bfd_reloc_outofrange: + abort (); + case bfd_reloc_overflow: + if (! ((*finfo->info->callbacks->reloc_overflow) + (finfo->info, + (p->type == bfd_section_reloc_link_order + ? bfd_section_name (finfo->output_bfd, + pr->u.section) + : pr->u.name), + howto->name, pr->addend, (bfd *) NULL, + (asection *) NULL, (bfd_vma) 0))) + { + free (buf); + return false; + } + break; + } + ok = bfd_set_section_contents (finfo->output_bfd, o, + (PTR) buf, + (file_ptr) p->offset, + size); + free (buf); + if (! ok) + return false; + } + } + else + { + PUT_WORD (finfo->output_bfd, p->offset, erel.r_address); + + if (bfd_header_big_endian (finfo->output_bfd)) + { + erel.r_index[0] = r_index >> 16; + erel.r_index[1] = r_index >> 8; + erel.r_index[2] = r_index; + erel.r_type[0] = + ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0) + | (howto->type << RELOC_EXT_BITS_TYPE_SH_BIG)); + } + else + { + erel.r_index[2] = r_index >> 16; + erel.r_index[1] = r_index >> 8; + erel.r_index[0] = r_index; + erel.r_type[0] = + (r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0) + | (howto->type << RELOC_EXT_BITS_TYPE_SH_LITTLE); + } + + PUT_WORD (finfo->output_bfd, pr->addend, erel.r_addend); + + rel_ptr = (PTR) &erel; + } + + if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0 + || (bfd_write (rel_ptr, (bfd_size_type) 1, + obj_reloc_entry_size (finfo->output_bfd), + finfo->output_bfd) + != obj_reloc_entry_size (finfo->output_bfd))) + return false; + + *reloff_ptr += obj_reloc_entry_size (finfo->output_bfd); + + /* Assert that the relocs have not run into the symbols, and that n + the text relocs have not run into the data relocs. */ + BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd) + && (reloff_ptr != &finfo->treloff + || (*reloff_ptr + <= obj_datasec (finfo->output_bfd)->rel_filepos))); + + return true; +} |