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Diffstat (limited to 'gdb/mdebugread.c')
| -rw-r--r-- | gdb/mdebugread.c | 4544 |
1 files changed, 4544 insertions, 0 deletions
diff --git a/gdb/mdebugread.c b/gdb/mdebugread.c new file mode 100644 index 00000000000..1064490dcff --- /dev/null +++ b/gdb/mdebugread.c @@ -0,0 +1,4544 @@ +/* Read a symbol table in ECOFF format (Third-Eye). + Copyright 1986, 87, 89, 90, 91, 92, 93, 94, 95, 96, 97, 1998 + Free Software Foundation, Inc. + Original version contributed by Alessandro Forin (af@cs.cmu.edu) at + CMU. Major work by Per Bothner, John Gilmore and Ian Lance Taylor + at Cygnus Support. + +This file is part of GDB. + +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. */ + +/* This module provides the function mdebug_build_psymtabs. It reads + ECOFF debugging information into partial symbol tables. The + debugging information is read from two structures. A struct + ecoff_debug_swap includes the sizes of each ECOFF structure and + swapping routines; these are fixed for a particular target. A + struct ecoff_debug_info points to the debugging information for a + particular object file. + + ECOFF symbol tables are mostly written in the byte order of the + target machine. However, one section of the table (the auxiliary + symbol information) is written in the host byte order. There is a + bit in the other symbol info which describes which host byte order + was used. ECOFF thereby takes the trophy from Intel `b.out' for + the most brain-dead adaptation of a file format to byte order. + + This module can read all four of the known byte-order combinations, + on any type of host. */ + +#include "defs.h" +#include "symtab.h" +#include "gdbtypes.h" +#include "gdbcore.h" +#include "symfile.h" +#include "objfiles.h" +#include "obstack.h" +#include "buildsym.h" +#include "stabsread.h" +#include "complaints.h" +#include "demangle.h" + +/* These are needed if the tm.h file does not contain the necessary + mips specific definitions. */ + +#ifndef MIPS_EFI_SYMBOL_NAME +#define MIPS_EFI_SYMBOL_NAME "__GDB_EFI_INFO__" +extern void ecoff_relocate_efi PARAMS ((struct symbol *, CORE_ADDR)); +#include "coff/sym.h" +#include "coff/symconst.h" +typedef struct mips_extra_func_info { + long numargs; + PDR pdr; +} *mips_extra_func_info_t; +#ifndef RA_REGNUM +#define RA_REGNUM 0 +#endif +#endif + +#ifdef USG +#include <sys/types.h> +#endif + +#include "gdb_stat.h" +#include "gdb_string.h" + +#include "gdb-stabs.h" + +#include "bfd.h" + +#include "coff/ecoff.h" /* COFF-like aspects of ecoff files */ + +#include "libaout.h" /* Private BFD a.out information. */ +#include "aout/aout64.h" +#include "aout/stab_gnu.h" /* STABS information */ + +#include "expression.h" +#include "language.h" /* Needed inside partial-stab.h */ + + +/* Provide a default mapping from a ecoff register number to a gdb REGNUM. */ +#ifndef ECOFF_REG_TO_REGNUM +#define ECOFF_REG_TO_REGNUM(num) (num) +#endif + +/* Provide a way to test if we have both ECOFF and ELF symbol tables. + We use this define in order to know whether we should override a + symbol's ECOFF section with its ELF section. This is necessary in + case the symbol's ELF section could not be represented in ECOFF. */ +#define ECOFF_IN_ELF(bfd) (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ + && bfd_get_section_by_name (bfd, ".mdebug") != NULL) + + +/* We put a pointer to this structure in the read_symtab_private field + of the psymtab. */ + +struct symloc +{ + /* Index of the FDR that this psymtab represents. */ + int fdr_idx; + /* The BFD that the psymtab was created from. */ + bfd *cur_bfd; + const struct ecoff_debug_swap *debug_swap; + struct ecoff_debug_info *debug_info; + struct mdebug_pending **pending_list; + /* Pointer to external symbols for this file. */ + EXTR *extern_tab; + /* Size of extern_tab. */ + int extern_count; + enum language pst_language; +}; + +#define PST_PRIVATE(p) ((struct symloc *)(p)->read_symtab_private) +#define FDR_IDX(p) (PST_PRIVATE(p)->fdr_idx) +#define CUR_BFD(p) (PST_PRIVATE(p)->cur_bfd) +#define DEBUG_SWAP(p) (PST_PRIVATE(p)->debug_swap) +#define DEBUG_INFO(p) (PST_PRIVATE(p)->debug_info) +#define PENDING_LIST(p) (PST_PRIVATE(p)->pending_list) + +#define SC_IS_TEXT(sc) ((sc) == scText \ + || (sc) == scRConst \ + || (sc) == scInit \ + || (sc) == scFini) +#define SC_IS_DATA(sc) ((sc) == scData \ + || (sc) == scSData \ + || (sc) == scRData \ + || (sc) == scPData \ + || (sc) == scXData) +#define SC_IS_COMMON(sc) ((sc) == scCommon || (sc) == scSCommon) +#define SC_IS_BSS(sc) ((sc) == scBss || (sc) == scSBss) +#define SC_IS_UNDEF(sc) ((sc) == scUndefined || (sc) == scSUndefined) + + +/* Things we import explicitly from other modules */ + +extern int info_verbose; + +/* Various complaints about symbol reading that don't abort the process */ + +static struct complaint bad_file_number_complaint = +{"bad file number %d", 0, 0}; + +static struct complaint index_complaint = +{"bad aux index at symbol %s", 0, 0}; + +static struct complaint aux_index_complaint = +{"bad proc end in aux found from symbol %s", 0, 0}; + +static struct complaint block_index_complaint = +{"bad aux index at block symbol %s", 0, 0}; + +static struct complaint unknown_ext_complaint = +{"unknown external symbol %s", 0, 0}; + +static struct complaint unknown_sym_complaint = +{"unknown local symbol %s", 0, 0}; + +static struct complaint unknown_st_complaint = +{"with type %d", 0, 0}; + +static struct complaint block_overflow_complaint = +{"block containing %s overfilled", 0, 0}; + +static struct complaint basic_type_complaint = +{"cannot map ECOFF basic type 0x%x for %s", 0, 0}; + +static struct complaint unknown_type_qual_complaint = +{"unknown type qualifier 0x%x", 0, 0}; + +static struct complaint array_index_type_complaint = +{"illegal array index type for %s, assuming int", 0, 0}; + +static struct complaint bad_tag_guess_complaint = +{"guessed tag type of %s incorrectly", 0, 0}; + +static struct complaint block_member_complaint = +{"declaration block contains unhandled symbol type %d", 0, 0}; + +static struct complaint stEnd_complaint = +{"stEnd with storage class %d not handled", 0, 0}; + +static struct complaint unknown_mdebug_symtype_complaint = +{"unknown symbol type 0x%x", 0, 0}; + +static struct complaint stab_unknown_complaint = +{"unknown stabs symbol %s", 0, 0}; + +static struct complaint pdr_for_nonsymbol_complaint = +{"PDR for %s, but no symbol", 0, 0}; + +static struct complaint pdr_static_symbol_complaint = +{"can't handle PDR for static proc at 0x%lx", 0, 0}; + +static struct complaint bad_setjmp_pdr_complaint = +{"fixing bad setjmp PDR from libc", 0, 0}; + +static struct complaint bad_fbitfield_complaint = +{"can't handle TIR fBitfield for %s", 0, 0}; + +static struct complaint bad_continued_complaint = +{"illegal TIR continued for %s", 0, 0}; + +static struct complaint bad_rfd_entry_complaint = +{"bad rfd entry for %s: file %d, index %d", 0, 0}; + +static struct complaint unexpected_type_code_complaint = +{"unexpected type code for %s", 0, 0}; + +static struct complaint unable_to_cross_ref_complaint = +{"unable to cross ref btTypedef for %s", 0, 0}; + +static struct complaint bad_indirect_xref_complaint = +{"unable to cross ref btIndirect for %s", 0, 0}; + +static struct complaint illegal_forward_tq0_complaint = +{"illegal tq0 in forward typedef for %s", 0, 0}; + +static struct complaint illegal_forward_bt_complaint = +{"illegal bt %d in forward typedef for %s", 0, 0}; + +static struct complaint bad_linetable_guess_complaint = +{"guessed size of linetable for %s incorrectly", 0, 0}; + +static struct complaint bad_ext_ifd_complaint = +{"bad ifd for external symbol: %d (max %d)", 0, 0}; + +static struct complaint bad_ext_iss_complaint = +{"bad iss for external symbol: %ld (max %ld)", 0, 0}; + +/* Macros and extra defs */ + +/* Puns: hard to find whether -g was used and how */ + +#define MIN_GLEVEL GLEVEL_0 +#define compare_glevel(a,b) \ + (((a) == GLEVEL_3) ? ((b) < GLEVEL_3) : \ + ((b) == GLEVEL_3) ? -1 : (int)((b) - (a))) + +/* Things that really are local to this module */ + +/* Remember what we deduced to be the source language of this psymtab. */ + +static enum language psymtab_language = language_unknown; + +/* Current BFD. */ + +static bfd *cur_bfd; + +/* How to parse debugging information for CUR_BFD. */ + +static const struct ecoff_debug_swap *debug_swap; + +/* Pointers to debugging information for CUR_BFD. */ + +static struct ecoff_debug_info *debug_info; + +/* Pointer to current file decriptor record, and its index */ + +static FDR *cur_fdr; +static int cur_fd; + +/* Index of current symbol */ + +static int cur_sdx; + +/* Note how much "debuggable" this image is. We would like + to see at least one FDR with full symbols */ + +static int max_gdbinfo; +static int max_glevel; + +/* When examining .o files, report on undefined symbols */ + +static int n_undef_symbols, n_undef_labels, n_undef_vars, n_undef_procs; + +/* Pseudo symbol to use when putting stabs into the symbol table. */ + +static char stabs_symbol[] = STABS_SYMBOL; + +/* Types corresponding to mdebug format bt* basic types. */ + +static struct type *mdebug_type_void; +static struct type *mdebug_type_char; +static struct type *mdebug_type_short; +static struct type *mdebug_type_int_32; +#define mdebug_type_int mdebug_type_int_32 +static struct type *mdebug_type_int_64; +static struct type *mdebug_type_long_32; +static struct type *mdebug_type_long_64; +static struct type *mdebug_type_long_long_64; +static struct type *mdebug_type_unsigned_char; +static struct type *mdebug_type_unsigned_short; +static struct type *mdebug_type_unsigned_int_32; +static struct type *mdebug_type_unsigned_int_64; +static struct type *mdebug_type_unsigned_long_32; +static struct type *mdebug_type_unsigned_long_64; +static struct type *mdebug_type_unsigned_long_long_64; +static struct type *mdebug_type_adr_32; +static struct type *mdebug_type_adr_64; +static struct type *mdebug_type_float; +static struct type *mdebug_type_double; +static struct type *mdebug_type_complex; +static struct type *mdebug_type_double_complex; +static struct type *mdebug_type_fixed_dec; +static struct type *mdebug_type_float_dec; +static struct type *mdebug_type_string; + +/* Types for symbols from files compiled without debugging info. */ + +static struct type *nodebug_func_symbol_type; +static struct type *nodebug_var_symbol_type; + +/* Nonzero if we have seen ecoff debugging info for a file. */ + +static int found_ecoff_debugging_info; + +/* Forward declarations */ + +static void +add_pending PARAMS ((FDR *, char *, struct type *)); + +static struct mdebug_pending * +is_pending_symbol PARAMS ((FDR *, char *)); + +static void +pop_parse_stack PARAMS ((void)); + +static void +push_parse_stack PARAMS ((void)); + +static char * +fdr_name PARAMS ((FDR *)); + +static void +mdebug_psymtab_to_symtab PARAMS ((struct partial_symtab *)); + +static int +upgrade_type PARAMS ((int, struct type **, int, union aux_ext *, int, char *)); + +static void +parse_partial_symbols PARAMS ((struct objfile *, + struct section_offsets *)); + +static FDR +*get_rfd PARAMS ((int, int)); + +static int +has_opaque_xref PARAMS ((FDR *, SYMR *)); + +static int +cross_ref PARAMS ((int, union aux_ext *, struct type **, enum type_code, + char **, int, char *)); + +static struct symbol * +new_symbol PARAMS ((char *)); + +static struct type * +new_type PARAMS ((char *)); + +static struct block * +new_block PARAMS ((int)); + +static struct symtab * +new_symtab PARAMS ((char *, int, int, struct objfile *)); + +static struct linetable * +new_linetable PARAMS ((int)); + +static struct blockvector * +new_bvect PARAMS ((int)); + +static int +parse_symbol PARAMS ((SYMR *, union aux_ext *, char *, int, struct section_offsets *)); + +static struct type * +parse_type PARAMS ((int, union aux_ext *, unsigned int, int *, int, char *)); + +static struct symbol * +mylookup_symbol PARAMS ((char *, struct block *, namespace_enum, + enum address_class)); + +static struct block * +shrink_block PARAMS ((struct block *, struct symtab *)); + +static PTR +xzalloc PARAMS ((unsigned int)); + +static void +sort_blocks PARAMS ((struct symtab *)); + +static int +compare_blocks PARAMS ((const void *, const void *)); + +static struct partial_symtab * +new_psymtab PARAMS ((char *, struct objfile *, struct section_offsets *)); + +static void +psymtab_to_symtab_1 PARAMS ((struct partial_symtab *, char *)); + +static void +add_block PARAMS ((struct block *, struct symtab *)); + +static void +add_symbol PARAMS ((struct symbol *, struct block *)); + +static int +add_line PARAMS ((struct linetable *, int, CORE_ADDR, int)); + +static struct linetable * +shrink_linetable PARAMS ((struct linetable *)); + +static void +handle_psymbol_enumerators PARAMS ((struct objfile *, FDR *, int, CORE_ADDR)); + +static char * +mdebug_next_symbol_text PARAMS ((struct objfile *)); + +/* Address bounds for the signal trampoline in inferior, if any */ + +CORE_ADDR sigtramp_address, sigtramp_end; + +/* Allocate zeroed memory */ + +static PTR +xzalloc (size) + unsigned int size; +{ + PTR p = xmalloc (size); + + memset (p, 0, size); + return p; +} + +/* Exported procedure: Builds a symtab from the PST partial one. + Restores the environment in effect when PST was created, delegates + most of the work to an ancillary procedure, and sorts + and reorders the symtab list at the end */ + +static void +mdebug_psymtab_to_symtab (pst) + struct partial_symtab *pst; +{ + + if (!pst) + return; + + if (info_verbose) + { + printf_filtered ("Reading in symbols for %s...", pst->filename); + gdb_flush (gdb_stdout); + } + + next_symbol_text_func = mdebug_next_symbol_text; + + psymtab_to_symtab_1 (pst, pst->filename); + + /* Match with global symbols. This only needs to be done once, + after all of the symtabs and dependencies have been read in. */ + scan_file_globals (pst->objfile); + + if (info_verbose) + printf_filtered ("done.\n"); +} + +/* File-level interface functions */ + +/* Find a file descriptor given its index RF relative to a file CF */ + +static FDR * +get_rfd (cf, rf) + int cf, rf; +{ + FDR *fdrs; + register FDR *f; + RFDT rfd; + + fdrs = debug_info->fdr; + f = fdrs + cf; + /* Object files do not have the RFD table, all refs are absolute */ + if (f->rfdBase == 0) + return fdrs + rf; + (*debug_swap->swap_rfd_in) (cur_bfd, + ((char *) debug_info->external_rfd + + ((f->rfdBase + rf) + * debug_swap->external_rfd_size)), + &rfd); + return fdrs + rfd; +} + +/* Return a safer print NAME for a file descriptor */ + +static char * +fdr_name (f) + FDR *f; +{ + if (f->rss == -1) + return "<stripped file>"; + if (f->rss == 0) + return "<NFY>"; + return debug_info->ss + f->issBase + f->rss; +} + + +/* Read in and parse the symtab of the file OBJFILE. Symbols from + different sections are relocated via the SECTION_OFFSETS. */ + +void +mdebug_build_psymtabs (objfile, swap, info, section_offsets) + struct objfile *objfile; + const struct ecoff_debug_swap *swap; + struct ecoff_debug_info *info; + struct section_offsets *section_offsets; +{ + cur_bfd = objfile->obfd; + debug_swap = swap; + debug_info = info; + + /* Make sure all the FDR information is swapped in. */ + if (info->fdr == (FDR *) NULL) + { + char *fdr_src; + char *fdr_end; + FDR *fdr_ptr; + + info->fdr = (FDR *) obstack_alloc (&objfile->psymbol_obstack, + (info->symbolic_header.ifdMax + * sizeof (FDR))); + fdr_src = info->external_fdr; + fdr_end = (fdr_src + + info->symbolic_header.ifdMax * swap->external_fdr_size); + fdr_ptr = info->fdr; + for (; fdr_src < fdr_end; fdr_src += swap->external_fdr_size, fdr_ptr++) + (*swap->swap_fdr_in) (objfile->obfd, fdr_src, fdr_ptr); + } + + parse_partial_symbols (objfile, section_offsets); + +#if 0 + /* Check to make sure file was compiled with -g. If not, warn the + user of this limitation. */ + if (compare_glevel (max_glevel, GLEVEL_2) < 0) + { + if (max_gdbinfo == 0) + printf_unfiltered ("\n%s not compiled with -g, debugging support is limited.\n", + objfile->name); + printf_unfiltered ("You should compile with -g2 or -g3 for best debugging support.\n"); + gdb_flush (gdb_stdout); + } +#endif +} + +/* Local utilities */ + +/* Map of FDR indexes to partial symtabs */ + +struct pst_map +{ + struct partial_symtab *pst; /* the psymtab proper */ + long n_globals; /* exported globals (external symbols) */ + long globals_offset; /* cumulative */ +}; + + +/* Utility stack, used to nest procedures and blocks properly. + It is a doubly linked list, to avoid too many alloc/free. + Since we might need it quite a few times it is NOT deallocated + after use. */ + +static struct parse_stack +{ + struct parse_stack *next, *prev; + struct symtab *cur_st; /* Current symtab. */ + struct block *cur_block; /* Block in it. */ + + /* What are we parsing. stFile, or stBlock are for files and + blocks. stProc or stStaticProc means we have seen the start of a + procedure, but not the start of the block within in. When we see + the start of that block, we change it to stNil, without pushing a + new block, i.e. stNil means both a procedure and a block. */ + + int blocktype; + + int maxsyms; /* Max symbols in this block. */ + struct type *cur_type; /* Type we parse fields for. */ + int cur_field; /* Field number in cur_type. */ + CORE_ADDR procadr; /* Start addres of this procedure */ + int numargs; /* Its argument count */ +} + + *top_stack; /* Top stack ptr */ + + +/* Enter a new lexical context */ + +static void +push_parse_stack () +{ + struct parse_stack *new; + + /* Reuse frames if possible */ + if (top_stack && top_stack->prev) + new = top_stack->prev; + else + new = (struct parse_stack *) xzalloc (sizeof (struct parse_stack)); + /* Initialize new frame with previous content */ + if (top_stack) + { + register struct parse_stack *prev = new->prev; + + *new = *top_stack; + top_stack->prev = new; + new->prev = prev; + new->next = top_stack; + } + top_stack = new; +} + +/* Exit a lexical context */ + +static void +pop_parse_stack () +{ + if (!top_stack) + return; + if (top_stack->next) + top_stack = top_stack->next; +} + + +/* Cross-references might be to things we haven't looked at + yet, e.g. type references. To avoid too many type + duplications we keep a quick fixup table, an array + of lists of references indexed by file descriptor */ + +struct mdebug_pending +{ + struct mdebug_pending *next; /* link */ + char *s; /* the unswapped symbol */ + struct type *t; /* its partial type descriptor */ +}; + + +/* The pending information is kept for an entire object file, and used + to be in the sym_private field. I took it out when I split + mdebugread from mipsread, because this might not be the only type + of symbols read from an object file. Instead, we allocate the + pending information table when we create the partial symbols, and + we store a pointer to the single table in each psymtab. */ + +static struct mdebug_pending **pending_list; + +/* Check whether we already saw symbol SH in file FH */ + +static struct mdebug_pending * +is_pending_symbol (fh, sh) + FDR *fh; + char *sh; +{ + int f_idx = fh - debug_info->fdr; + register struct mdebug_pending *p; + + /* Linear search is ok, list is typically no more than 10 deep */ + for (p = pending_list[f_idx]; p; p = p->next) + if (p->s == sh) + break; + return p; +} + +/* Add a new symbol SH of type T */ + +static void +add_pending (fh, sh, t) + FDR *fh; + char *sh; + struct type *t; +{ + int f_idx = fh - debug_info->fdr; + struct mdebug_pending *p = is_pending_symbol (fh, sh); + + /* Make sure we do not make duplicates */ + if (!p) + { + p = ((struct mdebug_pending *) + obstack_alloc (¤t_objfile->psymbol_obstack, + sizeof (struct mdebug_pending))); + p->s = sh; + p->t = t; + p->next = pending_list[f_idx]; + pending_list[f_idx] = p; + } +} + + +/* Parsing Routines proper. */ + +/* Parse a single symbol. Mostly just make up a GDB symbol for it. + For blocks, procedures and types we open a new lexical context. + This is basically just a big switch on the symbol's type. Argument + AX is the base pointer of aux symbols for this file (fh->iauxBase). + EXT_SH points to the unswapped symbol, which is needed for struct, + union, etc., types; it is NULL for an EXTR. BIGEND says whether + aux symbols are big-endian or little-endian. Return count of + SYMR's handled (normally one). */ + +static int +parse_symbol (sh, ax, ext_sh, bigend, section_offsets) + SYMR *sh; + union aux_ext *ax; + char *ext_sh; + int bigend; + struct section_offsets *section_offsets; +{ + const bfd_size_type external_sym_size = debug_swap->external_sym_size; + void (* const swap_sym_in) PARAMS ((bfd *, PTR, SYMR *)) = + debug_swap->swap_sym_in; + char *name; + struct symbol *s; + struct block *b; + struct mdebug_pending *pend; + struct type *t; + struct field *f; + int count = 1; + enum address_class class; + TIR tir; + long svalue = sh->value; + int bitsize; + + if (ext_sh == (char *) NULL) + name = debug_info->ssext + sh->iss; + else + name = debug_info->ss + cur_fdr->issBase + sh->iss; + + switch (sh->sc) + { + case scText: + case scRConst: + /* Do not relocate relative values. + The value of a stEnd symbol is the displacement from the + corresponding start symbol value. + The value of a stBlock symbol is the displacement from the + procedure address. */ + if (sh->st != stEnd && sh->st != stBlock) + sh->value += ANOFFSET (section_offsets, SECT_OFF_TEXT); + break; + case scData: + case scSData: + case scRData: + case scPData: + case scXData: + sh->value += ANOFFSET (section_offsets, SECT_OFF_DATA); + break; + case scBss: + case scSBss: + sh->value += ANOFFSET (section_offsets, SECT_OFF_BSS); + break; + } + + switch (sh->st) + { + case stNil: + break; + + case stGlobal: /* external symbol, goes into global block */ + class = LOC_STATIC; + b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (top_stack->cur_st), + GLOBAL_BLOCK); + s = new_symbol (name); + SYMBOL_VALUE_ADDRESS (s) = (CORE_ADDR) sh->value; + goto data; + + case stStatic: /* static data, goes into current block. */ + class = LOC_STATIC; + b = top_stack->cur_block; + s = new_symbol (name); + if (SC_IS_COMMON(sh->sc)) + { + /* It is a FORTRAN common block. At least for SGI Fortran the + address is not in the symbol; we need to fix it later in + scan_file_globals. */ + int bucket = hashname (SYMBOL_NAME (s)); + SYMBOL_VALUE_CHAIN (s) = global_sym_chain[bucket]; + global_sym_chain[bucket] = s; + } + else + SYMBOL_VALUE_ADDRESS (s) = (CORE_ADDR) sh->value; + goto data; + + case stLocal: /* local variable, goes into current block */ + if (sh->sc == scRegister) + { + class = LOC_REGISTER; + svalue = ECOFF_REG_TO_REGNUM (svalue); + } + else + class = LOC_LOCAL; + b = top_stack->cur_block; + s = new_symbol (name); + SYMBOL_VALUE (s) = svalue; + + data: /* Common code for symbols describing data */ + SYMBOL_NAMESPACE (s) = VAR_NAMESPACE; + SYMBOL_CLASS (s) = class; + add_symbol (s, b); + + /* Type could be missing if file is compiled without debugging info. */ + if (SC_IS_UNDEF(sh->sc) + || sh->sc == scNil || sh->index == indexNil) + SYMBOL_TYPE (s) = nodebug_var_symbol_type; + else + SYMBOL_TYPE (s) = parse_type (cur_fd, ax, sh->index, 0, bigend, name); + /* Value of a data symbol is its memory address */ + break; + + case stParam: /* arg to procedure, goes into current block */ + max_gdbinfo++; + found_ecoff_debugging_info = 1; + top_stack->numargs++; + + /* Special GNU C++ name. */ + if (is_cplus_marker (name[0]) && name[1] == 't' && name[2] == 0) + name = "this"; /* FIXME, not alloc'd in obstack */ + s = new_symbol (name); + + SYMBOL_NAMESPACE (s) = VAR_NAMESPACE; + switch (sh->sc) + { + case scRegister: + /* Pass by value in register. */ + SYMBOL_CLASS(s) = LOC_REGPARM; + svalue = ECOFF_REG_TO_REGNUM (svalue); + break; + case scVar: + /* Pass by reference on stack. */ + SYMBOL_CLASS(s) = LOC_REF_ARG; + break; + case scVarRegister: + /* Pass by reference in register. */ + SYMBOL_CLASS(s) = LOC_REGPARM_ADDR; + svalue = ECOFF_REG_TO_REGNUM (svalue); + break; + default: + /* Pass by value on stack. */ + SYMBOL_CLASS(s) = LOC_ARG; + break; + } + SYMBOL_VALUE (s) = svalue; + SYMBOL_TYPE (s) = parse_type (cur_fd, ax, sh->index, 0, bigend, name); + add_symbol (s, top_stack->cur_block); + break; + + case stLabel: /* label, goes into current block */ + s = new_symbol (name); + SYMBOL_NAMESPACE (s) = VAR_NAMESPACE; /* so that it can be used */ + SYMBOL_CLASS (s) = LOC_LABEL; /* but not misused */ + SYMBOL_VALUE_ADDRESS (s) = (CORE_ADDR) sh->value; + SYMBOL_TYPE (s) = mdebug_type_int; + add_symbol (s, top_stack->cur_block); + break; + + case stProc: /* Procedure, usually goes into global block */ + case stStaticProc: /* Static procedure, goes into current block */ + s = new_symbol (name); + SYMBOL_NAMESPACE (s) = VAR_NAMESPACE; + SYMBOL_CLASS (s) = LOC_BLOCK; + /* Type of the return value */ + if (SC_IS_UNDEF(sh->sc) || sh->sc == scNil) + t = mdebug_type_int; + else + { + t = parse_type (cur_fd, ax, sh->index + 1, 0, bigend, name); + if (STREQ(name, "malloc") && t->code == TYPE_CODE_VOID) + { + /* I don't know why, but, at least under Alpha GNU/Linux, + when linking against a malloc without debugging + symbols, its read as a function returning void---this + is bad because it means we cannot call functions with + string arguments interactively; i.e., "call + printf("howdy\n")" would fail with the error message + "program has no memory available". To avoid this, we + patch up the type and make it void* + instead. (davidm@azstarnet.com) + */ + t = make_pointer_type (t, NULL); + } + } + b = top_stack->cur_block; + if (sh->st == stProc) + { + struct blockvector *bv = BLOCKVECTOR (top_stack->cur_st); + /* The next test should normally be true, but provides a + hook for nested functions (which we don't want to make + global). */ + if (b == BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)) + b = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK); + /* Irix 5 sometimes has duplicate names for the same + function. We want to add such names up at the global + level, not as a nested function. */ + else if (sh->value == top_stack->procadr) + b = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK); + } + add_symbol (s, b); + + /* Make a type for the procedure itself */ + SYMBOL_TYPE (s) = lookup_function_type (t); + + /* Create and enter a new lexical context */ + b = new_block (top_stack->maxsyms); + SYMBOL_BLOCK_VALUE (s) = b; + BLOCK_FUNCTION (b) = s; + BLOCK_START (b) = BLOCK_END (b) = sh->value; + BLOCK_SUPERBLOCK (b) = top_stack->cur_block; + add_block (b, top_stack->cur_st); + + /* Not if we only have partial info */ + if (SC_IS_UNDEF(sh->sc) || sh->sc == scNil) + break; + + push_parse_stack (); + top_stack->cur_block = b; + top_stack->blocktype = sh->st; + top_stack->cur_type = SYMBOL_TYPE (s); + top_stack->cur_field = -1; + top_stack->procadr = sh->value; + top_stack->numargs = 0; + break; + + /* Beginning of code for structure, union, and enum definitions. + They all share a common set of local variables, defined here. */ + { + enum type_code type_code; + char *ext_tsym; + int nfields; + long max_value; + struct field *f; + + case stStruct: /* Start a block defining a struct type */ + type_code = TYPE_CODE_STRUCT; + goto structured_common; + + case stUnion: /* Start a block defining a union type */ + type_code = TYPE_CODE_UNION; + goto structured_common; + + case stEnum: /* Start a block defining an enum type */ + type_code = TYPE_CODE_ENUM; + goto structured_common; + + case stBlock: /* Either a lexical block, or some type */ + if (sh->sc != scInfo && !SC_IS_COMMON(sh->sc)) + goto case_stBlock_code; /* Lexical block */ + + type_code = TYPE_CODE_UNDEF; /* We have a type. */ + + /* Common code for handling struct, union, enum, and/or as-yet- + unknown-type blocks of info about structured data. `type_code' + has been set to the proper TYPE_CODE, if we know it. */ + structured_common: + found_ecoff_debugging_info = 1; + push_parse_stack (); + top_stack->blocktype = stBlock; + + /* First count the number of fields and the highest value. */ + nfields = 0; + max_value = 0; + for (ext_tsym = ext_sh + external_sym_size; + ; + ext_tsym += external_sym_size) + { + SYMR tsym; + + (*swap_sym_in) (cur_bfd, ext_tsym, &tsym); + + switch (tsym.st) + { + case stEnd: + goto end_of_fields; + + case stMember: + if (nfields == 0 && type_code == TYPE_CODE_UNDEF) + /* If the type of the member is Nil (or Void), + without qualifiers, assume the tag is an + enumeration. + Alpha cc -migrate enums are recognized by a zero + index and a zero symbol value. + DU 4.0 cc enums are recognized by a member type of + btEnum without qualifiers and a zero symbol value. */ + if (tsym.index == indexNil + || (tsym.index == 0 && sh->value == 0)) + type_code = TYPE_CODE_ENUM; + else + { + (*debug_swap->swap_tir_in) (bigend, + &ax[tsym.index].a_ti, + &tir); + if ((tir.bt == btNil || tir.bt == btVoid + || (tir.bt == btEnum && sh->value == 0)) + && tir.tq0 == tqNil) + type_code = TYPE_CODE_ENUM; + } + nfields++; + if (tsym.value > max_value) + max_value = tsym.value; + break; + + case stBlock: + case stUnion: + case stEnum: + case stStruct: + { +#if 0 + /* This is a no-op; is it trying to tell us something + we should be checking? */ + if (tsym.sc == scVariant); /*UNIMPLEMENTED*/ +#endif + if (tsym.index != 0) + { + /* This is something like a struct within a + struct. Skip over the fields of the inner + struct. The -1 is because the for loop will + increment ext_tsym. */ + ext_tsym = ((char *) debug_info->external_sym + + ((cur_fdr->isymBase + tsym.index - 1) + * external_sym_size)); + } + } + break; + + case stTypedef: + /* mips cc puts out a typedef for struct x if it is not yet + defined when it encounters + struct y { struct x *xp; }; + Just ignore it. */ + break; + + case stIndirect: + /* Irix5 cc puts out a stIndirect for struct x if it is not + yet defined when it encounters + struct y { struct x *xp; }; + Just ignore it. */ + break; + + default: + complain (&block_member_complaint, tsym.st); + } + } + end_of_fields:; + + /* In an stBlock, there is no way to distinguish structs, + unions, and enums at this point. This is a bug in the + original design (that has been fixed with the recent + addition of the stStruct, stUnion, and stEnum symbol + types.) The way you can tell is if/when you see a variable + or field of that type. In that case the variable's type + (in the AUX table) says if the type is struct, union, or + enum, and points back to the stBlock here. So you can + patch the tag kind up later - but only if there actually is + a variable or field of that type. + + So until we know for sure, we will guess at this point. + The heuristic is: + If the first member has index==indexNil or a void type, + assume we have an enumeration. + Otherwise, if there is more than one member, and all + the members have offset 0, assume we have a union. + Otherwise, assume we have a struct. + + The heuristic could guess wrong in the case of of an + enumeration with no members or a union with one (or zero) + members, or when all except the last field of a struct have + width zero. These are uncommon and/or illegal situations, + and in any case guessing wrong probably doesn't matter + much. + + But if we later do find out we were wrong, we fixup the tag + kind. Members of an enumeration must be handled + differently from struct/union fields, and that is harder to + patch up, but luckily we shouldn't need to. (If there are + any enumeration members, we can tell for sure it's an enum + here.) */ + + if (type_code == TYPE_CODE_UNDEF) + if (nfields > 1 && max_value == 0) + type_code = TYPE_CODE_UNION; + else + type_code = TYPE_CODE_STRUCT; + + /* Create a new type or use the pending type. */ + pend = is_pending_symbol (cur_fdr, ext_sh); + if (pend == (struct mdebug_pending *) NULL) + { + t = new_type (NULL); + add_pending (cur_fdr, ext_sh, t); + } + else + t = pend->t; + + /* Do not set the tag name if it is a compiler generated tag name + (.Fxx or .xxfake or empty) for unnamed struct/union/enums. + Alpha cc puts out an sh->iss of zero for those. */ + if (sh->iss == 0 || name[0] == '.' || name[0] == '\0') + TYPE_TAG_NAME (t) = NULL; + else + TYPE_TAG_NAME (t) = obconcat (¤t_objfile->symbol_obstack, + "", "", name); + + TYPE_CODE (t) = type_code; + TYPE_LENGTH (t) = sh->value; + TYPE_NFIELDS (t) = nfields; + TYPE_FIELDS (t) = f = ((struct field *) + TYPE_ALLOC (t, + nfields * sizeof (struct field))); + + if (type_code == TYPE_CODE_ENUM) + { + int unsigned_enum = 1; + + /* This is a non-empty enum. */ + + /* DEC c89 has the number of enumerators in the sh.value field, + not the type length, so we have to compensate for that + incompatibility quirk. + This might do the wrong thing for an enum with one or two + enumerators and gcc -gcoff -fshort-enums, but these cases + are hopefully rare enough. + Alpha cc -migrate has a sh.value field of zero, we adjust + that too. */ + if (TYPE_LENGTH (t) == TYPE_NFIELDS (t) + || TYPE_LENGTH (t) == 0) + TYPE_LENGTH (t) = TARGET_INT_BIT / HOST_CHAR_BIT; + for (ext_tsym = ext_sh + external_sym_size; + ; + ext_tsym += external_sym_size) + { + SYMR tsym; + struct symbol *enum_sym; + + (*swap_sym_in) (cur_bfd, ext_tsym, &tsym); + + if (tsym.st != stMember) + break; + + FIELD_BITPOS (*f) = tsym.value; + FIELD_TYPE (*f) = t; + FIELD_NAME (*f) = debug_info->ss + cur_fdr->issBase + tsym.iss; + FIELD_BITSIZE (*f) = 0; + + enum_sym = ((struct symbol *) + obstack_alloc (¤t_objfile->symbol_obstack, + sizeof (struct symbol))); + memset ((PTR) enum_sym, 0, sizeof (struct symbol)); + SYMBOL_NAME (enum_sym) = + obsavestring (f->name, strlen (f->name), + ¤t_objfile->symbol_obstack); + SYMBOL_CLASS (enum_sym) = LOC_CONST; + SYMBOL_TYPE (enum_sym) = t; + SYMBOL_NAMESPACE (enum_sym) = VAR_NAMESPACE; + SYMBOL_VALUE (enum_sym) = tsym.value; + if (SYMBOL_VALUE (enum_sym) < 0) + unsigned_enum = 0; + add_symbol (enum_sym, top_stack->cur_block); + + /* Skip the stMembers that we've handled. */ + count++; + f++; + } + if (unsigned_enum) + TYPE_FLAGS (t) |= TYPE_FLAG_UNSIGNED; + } + /* make this the current type */ + top_stack->cur_type = t; + top_stack->cur_field = 0; + + /* Do not create a symbol for alpha cc unnamed structs. */ + if (sh->iss == 0) + break; + + /* gcc puts out an empty struct for an opaque struct definitions, + do not create a symbol for it either. */ + if (TYPE_NFIELDS (t) == 0) + { + TYPE_FLAGS (t) |= TYPE_FLAG_STUB; + break; + } + + s = new_symbol (name); + SYMBOL_NAMESPACE (s) = STRUCT_NAMESPACE; + SYMBOL_CLASS (s) = LOC_TYPEDEF; + SYMBOL_VALUE (s) = 0; + SYMBOL_TYPE (s) = t; + add_symbol (s, top_stack->cur_block); + break; + + /* End of local variables shared by struct, union, enum, and + block (as yet unknown struct/union/enum) processing. */ + } + + case_stBlock_code: + found_ecoff_debugging_info = 1; + /* beginnning of (code) block. Value of symbol + is the displacement from procedure start */ + push_parse_stack (); + + /* Do not start a new block if this is the outermost block of a + procedure. This allows the LOC_BLOCK symbol to point to the + block with the local variables, so funcname::var works. */ + if (top_stack->blocktype == stProc + || top_stack->blocktype == stStaticProc) + { + top_stack->blocktype = stNil; + break; + } + + top_stack->blocktype = stBlock; + b = new_block (top_stack->maxsyms); + BLOCK_START (b) = sh->value + top_stack->procadr; + BLOCK_SUPERBLOCK (b) = top_stack->cur_block; + top_stack->cur_block = b; + add_block (b, top_stack->cur_st); + break; + + case stEnd: /* end (of anything) */ + if (sh->sc == scInfo || SC_IS_COMMON(sh->sc)) + { + /* Finished with type */ + top_stack->cur_type = 0; + } + else if (sh->sc == scText && + (top_stack->blocktype == stProc || + top_stack->blocktype == stStaticProc)) + { + /* Finished with procedure */ + struct blockvector *bv = BLOCKVECTOR (top_stack->cur_st); + struct mips_extra_func_info *e; + struct block *b; + struct type *ftype = top_stack->cur_type; + int i; + + BLOCK_END (top_stack->cur_block) += sh->value; /* size */ + + /* Make up special symbol to contain procedure specific info */ + s = new_symbol (MIPS_EFI_SYMBOL_NAME); + SYMBOL_NAMESPACE (s) = LABEL_NAMESPACE; + SYMBOL_CLASS (s) = LOC_CONST; + SYMBOL_TYPE (s) = mdebug_type_void; + e = ((struct mips_extra_func_info *) + obstack_alloc (¤t_objfile->symbol_obstack, + sizeof (struct mips_extra_func_info))); + memset ((PTR) e, 0, sizeof (struct mips_extra_func_info)); + SYMBOL_VALUE (s) = (long) e; + e->numargs = top_stack->numargs; + e->pdr.framereg = -1; + add_symbol (s, top_stack->cur_block); + + /* Reallocate symbols, saving memory */ + b = shrink_block (top_stack->cur_block, top_stack->cur_st); + + /* f77 emits proc-level with address bounds==[0,0], + So look for such child blocks, and patch them. */ + for (i = 0; i < BLOCKVECTOR_NBLOCKS (bv); i++) + { + struct block *b_bad = BLOCKVECTOR_BLOCK (bv, i); + if (BLOCK_SUPERBLOCK (b_bad) == b + && BLOCK_START (b_bad) == top_stack->procadr + && BLOCK_END (b_bad) == top_stack->procadr) + { + BLOCK_START (b_bad) = BLOCK_START (b); + BLOCK_END (b_bad) = BLOCK_END (b); + } + } + + if (TYPE_NFIELDS (ftype) <= 0) + { + /* No parameter type information is recorded with the function's + type. Set that from the type of the parameter symbols. */ + int nparams = top_stack->numargs; + int iparams; + struct symbol *sym; + + if (nparams > 0) + { + TYPE_NFIELDS (ftype) = nparams; + TYPE_FIELDS (ftype) = (struct field *) + TYPE_ALLOC (ftype, nparams * sizeof (struct field)); + + for (i = iparams = 0; iparams < nparams; i++) + { + sym = BLOCK_SYM (b, i); + switch (SYMBOL_CLASS (sym)) + { + case LOC_ARG: + case LOC_REF_ARG: + case LOC_REGPARM: + case LOC_REGPARM_ADDR: + TYPE_FIELD_TYPE (ftype, iparams) = SYMBOL_TYPE (sym); + iparams++; + break; + default: + break; + } + } + } + } + } + else if (sh->sc == scText && top_stack->blocktype == stBlock) + { + /* End of (code) block. The value of the symbol is the + displacement from the procedure`s start address of the + end of this block. */ + BLOCK_END (top_stack->cur_block) = sh->value + top_stack->procadr; + shrink_block (top_stack->cur_block, top_stack->cur_st); + } + else if (sh->sc == scText && top_stack->blocktype == stNil) + { + /* End of outermost block. Pop parse stack and ignore. The + following stEnd of stProc will take care of the block. */ + ; + } + else if (sh->sc == scText && top_stack->blocktype == stFile) + { + /* End of file. Pop parse stack and ignore. Higher + level code deals with this. */ + ; + } + else + complain (&stEnd_complaint, sh->sc); + + pop_parse_stack (); /* restore previous lexical context */ + break; + + case stMember: /* member of struct or union */ + f = &TYPE_FIELDS (top_stack->cur_type)[top_stack->cur_field++]; + FIELD_NAME (*f) = name; + FIELD_BITPOS (*f) = sh->value; + bitsize = 0; + FIELD_TYPE (*f) = parse_type (cur_fd, ax, sh->index, &bitsize, bigend, name); + FIELD_BITSIZE (*f) = bitsize; + break; + + case stIndirect: /* forward declaration on Irix5 */ + /* Forward declarations from Irix5 cc are handled by cross_ref, + skip them. */ + break; + + case stTypedef: /* type definition */ + found_ecoff_debugging_info = 1; + + /* Typedefs for forward declarations and opaque structs from alpha cc + are handled by cross_ref, skip them. */ + if (sh->iss == 0) + break; + + /* Parse the type or use the pending type. */ + pend = is_pending_symbol (cur_fdr, ext_sh); + if (pend == (struct mdebug_pending *) NULL) + { + t = parse_type (cur_fd, ax, sh->index, (int *)NULL, bigend, name); + add_pending (cur_fdr, ext_sh, t); + } + else + t = pend->t; + + /* mips cc puts out a typedef with the name of the struct for forward + declarations. These should not go into the symbol table and + TYPE_NAME should not be set for them. + They can't be distinguished from an intentional typedef to + the same name however: + x.h: + struct x { int ix; int jx; }; + struct xx; + x.c: + typedef struct x x; + struct xx {int ixx; int jxx; }; + generates a cross referencing stTypedef for x and xx. + The user visible effect of this is that the type of a pointer + to struct foo sometimes is given as `foo *' instead of `struct foo *'. + The problem is fixed with alpha cc and Irix5 cc. */ + + /* However if the typedef cross references to an opaque aggregate, it + is safe to omit it from the symbol table. */ + + if (has_opaque_xref (cur_fdr, sh)) + break; + s = new_symbol (name); + SYMBOL_NAMESPACE (s) = VAR_NAMESPACE; + SYMBOL_CLASS (s) = LOC_TYPEDEF; + SYMBOL_BLOCK_VALUE (s) = top_stack->cur_block; + SYMBOL_TYPE (s) = t; + add_symbol (s, top_stack->cur_block); + + /* Incomplete definitions of structs should not get a name. */ + if (TYPE_NAME (SYMBOL_TYPE (s)) == NULL + && (TYPE_NFIELDS (SYMBOL_TYPE (s)) != 0 + || (TYPE_CODE (SYMBOL_TYPE (s)) != TYPE_CODE_STRUCT + && TYPE_CODE (SYMBOL_TYPE (s)) != TYPE_CODE_UNION))) + { + if (TYPE_CODE (SYMBOL_TYPE (s)) == TYPE_CODE_PTR + || TYPE_CODE (SYMBOL_TYPE (s)) == TYPE_CODE_FUNC) + { + /* If we are giving a name to a type such as "pointer to + foo" or "function returning foo", we better not set + the TYPE_NAME. If the program contains "typedef char + *caddr_t;", we don't want all variables of type char + * to print as caddr_t. This is not just a + consequence of GDB's type management; CC and GCC (at + least through version 2.4) both output variables of + either type char * or caddr_t with the type + refering to the stTypedef symbol for caddr_t. If a future + compiler cleans this up it GDB is not ready for it + yet, but if it becomes ready we somehow need to + disable this check (without breaking the PCC/GCC2.4 + case). + + Sigh. + + Fortunately, this check seems not to be necessary + for anything except pointers or functions. */ + } + else + TYPE_NAME (SYMBOL_TYPE (s)) = SYMBOL_NAME (s); + } + break; + + case stFile: /* file name */ + push_parse_stack (); + top_stack->blocktype = sh->st; + break; + + /* I`ve never seen these for C */ + case stRegReloc: + break; /* register relocation */ + case stForward: + break; /* forwarding address */ + case stConstant: + break; /* constant */ + default: + complain (&unknown_mdebug_symtype_complaint, sh->st); + break; + } + + return count; +} + +/* Parse the type information provided in the raw AX entries for + the symbol SH. Return the bitfield size in BS, in case. + We must byte-swap the AX entries before we use them; BIGEND says whether + they are big-endian or little-endian (from fh->fBigendian). */ + +static struct type * +parse_type (fd, ax, aux_index, bs, bigend, sym_name) + int fd; + union aux_ext *ax; + unsigned int aux_index; + int *bs; + int bigend; + char *sym_name; +{ + /* Null entries in this map are treated specially */ + static struct type **map_bt[] = + { + &mdebug_type_void, /* btNil */ + &mdebug_type_adr_32, /* btAdr */ + &mdebug_type_char, /* btChar */ + &mdebug_type_unsigned_char, /* btUChar */ + &mdebug_type_short, /* btShort */ + &mdebug_type_unsigned_short, /* btUShort */ + &mdebug_type_int_32, /* btInt */ + &mdebug_type_unsigned_int_32, /* btUInt */ + &mdebug_type_long_32, /* btLong */ + &mdebug_type_unsigned_long_32, /* btULong */ + &mdebug_type_float, /* btFloat */ + &mdebug_type_double, /* btDouble */ + 0, /* btStruct */ + 0, /* btUnion */ + 0, /* btEnum */ + 0, /* btTypedef */ + 0, /* btRange */ + 0, /* btSet */ + &mdebug_type_complex, /* btComplex */ + &mdebug_type_double_complex, /* btDComplex */ + 0, /* btIndirect */ + &mdebug_type_fixed_dec, /* btFixedDec */ + &mdebug_type_float_dec, /* btFloatDec */ + &mdebug_type_string, /* btString */ + 0, /* btBit */ + 0, /* btPicture */ + &mdebug_type_void, /* btVoid */ + 0, /* DEC C++: Pointer to member */ + 0, /* DEC C++: Virtual function table */ + 0, /* DEC C++: Class (Record) */ + &mdebug_type_long_64, /* btLong64 */ + &mdebug_type_unsigned_long_64, /* btULong64 */ + &mdebug_type_long_long_64, /* btLongLong64 */ + &mdebug_type_unsigned_long_long_64, /* btULongLong64 */ + &mdebug_type_adr_64, /* btAdr64 */ + &mdebug_type_int_64, /* btInt64 */ + &mdebug_type_unsigned_int_64, /* btUInt64 */ + }; + + TIR t[1]; + struct type *tp = 0; + enum type_code type_code = TYPE_CODE_UNDEF; + + /* Handle undefined types, they have indexNil. */ + if (aux_index == indexNil) + return mdebug_type_int; + + /* Handle corrupt aux indices. */ + if (aux_index >= (debug_info->fdr + fd)->caux) + { + complain (&index_complaint, sym_name); + return mdebug_type_int; + } + ax += aux_index; + + /* Use aux as a type information record, map its basic type. */ + (*debug_swap->swap_tir_in) (bigend, &ax->a_ti, t); + if (t->bt >= (sizeof (map_bt) / sizeof (*map_bt))) + { + complain (&basic_type_complaint, t->bt, sym_name); + return mdebug_type_int; + } + if (map_bt[t->bt]) + { + tp = *map_bt[t->bt]; + } + else + { + tp = NULL; + /* Cannot use builtin types -- build our own */ + switch (t->bt) + { + case btStruct: + type_code = TYPE_CODE_STRUCT; + break; + case btUnion: + type_code = TYPE_CODE_UNION; + break; + case btEnum: + type_code = TYPE_CODE_ENUM; + break; + case btRange: + type_code = TYPE_CODE_RANGE; + break; + case btSet: + type_code = TYPE_CODE_SET; + break; + case btIndirect: + /* alpha cc -migrate uses this for typedefs. The true type will + be obtained by crossreferencing below. */ + type_code = TYPE_CODE_ERROR; + break; + case btTypedef: + /* alpha cc uses this for typedefs. The true type will be + obtained by crossreferencing below. */ + type_code = TYPE_CODE_ERROR; + break; + default: + complain (&basic_type_complaint, t->bt, sym_name); + return mdebug_type_int; + } + } + + /* Move on to next aux */ + ax++; + + if (t->fBitfield) + { + int width = AUX_GET_WIDTH (bigend, ax); + + /* Inhibit core dumps with some cfront generated objects that + corrupt the TIR. */ + if (bs == (int *)NULL) + { + /* Alpha cc -migrate encodes char and unsigned char types + as short and unsigned short types with a field width of 8. + Enum types also have a field width which we ignore for now. */ + if (t->bt == btShort && width == 8) + tp = mdebug_type_char; + else if (t->bt == btUShort && width == 8) + tp = mdebug_type_unsigned_char; + else if (t->bt == btEnum) + ; + else + complain (&bad_fbitfield_complaint, sym_name); + } + else + *bs = width; + ax++; + } + + /* A btIndirect entry cross references to an aux entry containing + the type. */ + if (t->bt == btIndirect) + { + RNDXR rn[1]; + int rf; + FDR *xref_fh; + int xref_fd; + + (*debug_swap->swap_rndx_in) (bigend, &ax->a_rndx, rn); + ax++; + if (rn->rfd == 0xfff) + { + rf = AUX_GET_ISYM (bigend, ax); + ax++; + } + else + rf = rn->rfd; + + if (rf == -1) + { + complain (&bad_indirect_xref_complaint, sym_name); + return mdebug_type_int; + } + xref_fh = get_rfd (fd, rf); + xref_fd = xref_fh - debug_info->fdr; + tp = parse_type (xref_fd, debug_info->external_aux + xref_fh->iauxBase, + rn->index, (int *) NULL, xref_fh->fBigendian, sym_name); + } + + /* All these types really point to some (common) MIPS type + definition, and only the type-qualifiers fully identify + them. We'll make the same effort at sharing. */ + if (t->bt == btStruct || + t->bt == btUnion || + t->bt == btEnum || + + /* btSet (I think) implies that the name is a tag name, not a typedef + name. This apparently is a MIPS extension for C sets. */ + t->bt == btSet) + { + char *name; + + /* Try to cross reference this type, build new type on failure. */ + ax += cross_ref (fd, ax, &tp, type_code, &name, bigend, sym_name); + if (tp == (struct type *) NULL) + tp = init_type (type_code, 0, 0, (char *) NULL, current_objfile); + + /* DEC c89 produces cross references to qualified aggregate types, + dereference them. */ + while (TYPE_CODE (tp) == TYPE_CODE_PTR + || TYPE_CODE (tp) == TYPE_CODE_ARRAY) + tp = tp->target_type; + + /* Make sure that TYPE_CODE(tp) has an expected type code. + Any type may be returned from cross_ref if file indirect entries + are corrupted. */ + if (TYPE_CODE (tp) != TYPE_CODE_STRUCT + && TYPE_CODE (tp) != TYPE_CODE_UNION + && TYPE_CODE (tp) != TYPE_CODE_ENUM) + { + complain (&unexpected_type_code_complaint, sym_name); + } + else + { + + /* Usually, TYPE_CODE(tp) is already type_code. The main + exception is if we guessed wrong re struct/union/enum. + But for struct vs. union a wrong guess is harmless, so + don't complain(). */ + if ((TYPE_CODE (tp) == TYPE_CODE_ENUM + && type_code != TYPE_CODE_ENUM) + || (TYPE_CODE (tp) != TYPE_CODE_ENUM + && type_code == TYPE_CODE_ENUM)) + { + complain (&bad_tag_guess_complaint, sym_name); + } + + if (TYPE_CODE (tp) != type_code) + { + TYPE_CODE (tp) = type_code; + } + + /* Do not set the tag name if it is a compiler generated tag name + (.Fxx or .xxfake or empty) for unnamed struct/union/enums. */ + if (name[0] == '.' || name[0] == '\0') + TYPE_TAG_NAME (tp) = NULL; + else if (TYPE_TAG_NAME (tp) == NULL + || !STREQ (TYPE_TAG_NAME (tp), name)) + TYPE_TAG_NAME (tp) = obsavestring (name, strlen (name), + ¤t_objfile->type_obstack); + } + } + + /* All these types really point to some (common) MIPS type + definition, and only the type-qualifiers fully identify + them. We'll make the same effort at sharing. + FIXME: We are not doing any guessing on range types. */ + if (t->bt == btRange) + { + char *name; + + /* Try to cross reference this type, build new type on failure. */ + ax += cross_ref (fd, ax, &tp, type_code, &name, bigend, sym_name); + if (tp == (struct type *) NULL) + tp = init_type (type_code, 0, 0, (char *) NULL, current_objfile); + + /* Make sure that TYPE_CODE(tp) has an expected type code. + Any type may be returned from cross_ref if file indirect entries + are corrupted. */ + if (TYPE_CODE (tp) != TYPE_CODE_RANGE) + { + complain (&unexpected_type_code_complaint, sym_name); + } + else + { + /* Usually, TYPE_CODE(tp) is already type_code. The main + exception is if we guessed wrong re struct/union/enum. */ + if (TYPE_CODE (tp) != type_code) + { + complain (&bad_tag_guess_complaint, sym_name); + TYPE_CODE (tp) = type_code; + } + if (TYPE_NAME (tp) == NULL || !STREQ (TYPE_NAME (tp), name)) + TYPE_NAME (tp) = obsavestring (name, strlen (name), + ¤t_objfile->type_obstack); + } + } + if (t->bt == btTypedef) + { + char *name; + + /* Try to cross reference this type, it should succeed. */ + ax += cross_ref (fd, ax, &tp, type_code, &name, bigend, sym_name); + if (tp == (struct type *) NULL) + { + complain (&unable_to_cross_ref_complaint, sym_name); + tp = mdebug_type_int; + } + } + + /* Deal with range types */ + if (t->bt == btRange) + { + TYPE_NFIELDS (tp) = 2; + TYPE_FIELDS (tp) = ((struct field *) + TYPE_ALLOC (tp, 2 * sizeof (struct field))); + TYPE_FIELD_NAME (tp, 0) = obsavestring ("Low", strlen ("Low"), + ¤t_objfile->type_obstack); + TYPE_FIELD_BITPOS (tp, 0) = AUX_GET_DNLOW (bigend, ax); + ax++; + TYPE_FIELD_NAME (tp, 1) = obsavestring ("High", strlen ("High"), + ¤t_objfile->type_obstack); + TYPE_FIELD_BITPOS (tp, 1) = AUX_GET_DNHIGH (bigend, ax); + ax++; + } + + /* Parse all the type qualifiers now. If there are more + than 6 the game will continue in the next aux */ + + while (1) + { +#define PARSE_TQ(tq) \ + if (t->tq != tqNil) \ + ax += upgrade_type(fd, &tp, t->tq, ax, bigend, sym_name); \ + else \ + break; + + PARSE_TQ (tq0); + PARSE_TQ (tq1); + PARSE_TQ (tq2); + PARSE_TQ (tq3); + PARSE_TQ (tq4); + PARSE_TQ (tq5); +#undef PARSE_TQ + + /* mips cc 2.x and gcc never put out continued aux entries. */ + if (!t->continued) + break; + + (*debug_swap->swap_tir_in) (bigend, &ax->a_ti, t); + ax++; + } + + /* Complain for illegal continuations due to corrupt aux entries. */ + if (t->continued) + complain (&bad_continued_complaint, sym_name); + + return tp; +} + +/* Make up a complex type from a basic one. Type is passed by + reference in TPP and side-effected as necessary. The type + qualifier TQ says how to handle the aux symbols at AX for + the symbol SX we are currently analyzing. BIGEND says whether + aux symbols are big-endian or little-endian. + Returns the number of aux symbols we parsed. */ + +static int +upgrade_type (fd, tpp, tq, ax, bigend, sym_name) + int fd; + struct type **tpp; + int tq; + union aux_ext *ax; + int bigend; + char *sym_name; +{ + int off; + struct type *t; + + /* Used in array processing */ + int rf, id; + FDR *fh; + struct type *range; + struct type *indx; + int lower, upper; + RNDXR rndx; + + switch (tq) + { + case tqPtr: + t = lookup_pointer_type (*tpp); + *tpp = t; + return 0; + + case tqProc: + t = lookup_function_type (*tpp); + *tpp = t; + return 0; + + case tqArray: + off = 0; + + /* Determine and record the domain type (type of index) */ + (*debug_swap->swap_rndx_in) (bigend, &ax->a_rndx, &rndx); + id = rndx.index; + rf = rndx.rfd; + if (rf == 0xfff) + { + ax++; + rf = AUX_GET_ISYM (bigend, ax); + off++; + } + fh = get_rfd (fd, rf); + + indx = parse_type (fh - debug_info->fdr, + debug_info->external_aux + fh->iauxBase, + id, (int *) NULL, bigend, sym_name); + + /* The bounds type should be an integer type, but might be anything + else due to corrupt aux entries. */ + if (TYPE_CODE (indx) != TYPE_CODE_INT) + { + complain (&array_index_type_complaint, sym_name); + indx = mdebug_type_int; + } + + /* Get the bounds, and create the array type. */ + ax++; + lower = AUX_GET_DNLOW (bigend, ax); + ax++; + upper = AUX_GET_DNHIGH (bigend, ax); + ax++; + rf = AUX_GET_WIDTH (bigend, ax); /* bit size of array element */ + + range = create_range_type ((struct type *) NULL, indx, + lower, upper); + + t = create_array_type ((struct type *) NULL, *tpp, range); + + /* We used to fill in the supplied array element bitsize + here if the TYPE_LENGTH of the target type was zero. + This happens for a `pointer to an array of anonymous structs', + but in this case the array element bitsize is also zero, + so nothing is gained. + And we used to check the TYPE_LENGTH of the target type against + the supplied array element bitsize. + gcc causes a mismatch for `pointer to array of object', + since the sdb directives it uses do not have a way of + specifying the bitsize, but it does no harm (the + TYPE_LENGTH should be correct) and we should be able to + ignore the erroneous bitsize from the auxiliary entry safely. + dbx seems to ignore it too. */ + + /* TYPE_FLAG_TARGET_STUB now takes care of the zero TYPE_LENGTH + problem. */ + if (TYPE_LENGTH (*tpp) == 0) + { + TYPE_FLAGS (t) |= TYPE_FLAG_TARGET_STUB; + } + + *tpp = t; + return 4 + off; + + case tqVol: + /* Volatile -- currently ignored */ + return 0; + + case tqConst: + /* Const -- currently ignored */ + return 0; + + default: + complain (&unknown_type_qual_complaint, tq); + return 0; + } +} + + +/* Parse a procedure descriptor record PR. Note that the procedure is + parsed _after_ the local symbols, now we just insert the extra + information we need into a MIPS_EFI_SYMBOL_NAME symbol that has + already been placed in the procedure's main block. Note also that + images that have been partially stripped (ld -x) have been deprived + of local symbols, and we have to cope with them here. FIRST_OFF is + the offset of the first procedure for this FDR; we adjust the + address by this amount, but I don't know why. SEARCH_SYMTAB is the symtab + to look for the function which contains the MIPS_EFI_SYMBOL_NAME symbol + in question, or NULL to use top_stack->cur_block. */ + +static void parse_procedure PARAMS ((PDR *, struct symtab *, + struct partial_symtab *)); + +static void +parse_procedure (pr, search_symtab, pst) + PDR *pr; + struct symtab *search_symtab; + struct partial_symtab *pst; +{ + struct symbol *s, *i; + struct block *b; + struct mips_extra_func_info *e; + char *sh_name; + + /* Simple rule to find files linked "-x" */ + if (cur_fdr->rss == -1) + { + if (pr->isym == -1) + { + /* Static procedure at address pr->adr. Sigh. */ + /* FIXME-32x64. assuming pr->adr fits in long. */ + complain (&pdr_static_symbol_complaint, (unsigned long) pr->adr); + return; + } + else + { + /* external */ + EXTR she; + + (*debug_swap->swap_ext_in) (cur_bfd, + ((char *) debug_info->external_ext + + (pr->isym + * debug_swap->external_ext_size)), + &she); + sh_name = debug_info->ssext + she.asym.iss; + } + } + else + { + /* Full symbols */ + SYMR sh; + + (*debug_swap->swap_sym_in) (cur_bfd, + ((char *) debug_info->external_sym + + ((cur_fdr->isymBase + pr->isym) + * debug_swap->external_sym_size)), + &sh); + sh_name = debug_info->ss + cur_fdr->issBase + sh.iss; + } + + if (search_symtab != NULL) + { +#if 0 + /* This loses both in the case mentioned (want a static, find a global), + but also if we are looking up a non-mangled name which happens to + match the name of a mangled function. */ + /* We have to save the cur_fdr across the call to lookup_symbol. + If the pdr is for a static function and if a global function with + the same name exists, lookup_symbol will eventually read in the symtab + for the global function and clobber cur_fdr. */ + FDR *save_cur_fdr = cur_fdr; + s = lookup_symbol (sh_name, NULL, VAR_NAMESPACE, 0, NULL); + cur_fdr = save_cur_fdr; +#else + s = mylookup_symbol + (sh_name, + BLOCKVECTOR_BLOCK (BLOCKVECTOR (search_symtab), STATIC_BLOCK), + VAR_NAMESPACE, + LOC_BLOCK); +#endif + } + else + s = mylookup_symbol (sh_name, top_stack->cur_block, + VAR_NAMESPACE, LOC_BLOCK); + + if (s != 0) + { + b = SYMBOL_BLOCK_VALUE (s); + } + else + { + complain (&pdr_for_nonsymbol_complaint, sh_name); +#if 1 + return; +#else +/* FIXME -- delete. We can't do symbol allocation now; it's all done. */ + s = new_symbol (sh_name); + SYMBOL_NAMESPACE (s) = VAR_NAMESPACE; + SYMBOL_CLASS (s) = LOC_BLOCK; + /* Donno its type, hope int is ok */ + SYMBOL_TYPE (s) = lookup_function_type (mdebug_type_int); + add_symbol (s, top_stack->cur_block); + /* Wont have symbols for this one */ + b = new_block (2); + SYMBOL_BLOCK_VALUE (s) = b; + BLOCK_FUNCTION (b) = s; + BLOCK_START (b) = pr->adr; + /* BOUND used to be the end of procedure's text, but the + argument is no longer passed in. */ + BLOCK_END (b) = bound; + BLOCK_SUPERBLOCK (b) = top_stack->cur_block; + add_block (b, top_stack->cur_st); +#endif + } + + i = mylookup_symbol (MIPS_EFI_SYMBOL_NAME, b, LABEL_NAMESPACE, LOC_CONST); + + if (i) + { + e = (struct mips_extra_func_info *) SYMBOL_VALUE (i); + e->pdr = *pr; + e->pdr.isym = (long) s; + + /* GDB expects the absolute function start address for the + procedure descriptor in e->pdr.adr. + As the address in the procedure descriptor is usually relative, + we would have to relocate e->pdr.adr with cur_fdr->adr and + ANOFFSET (pst->section_offsets, SECT_OFF_TEXT). + Unfortunately cur_fdr->adr and e->pdr.adr are both absolute + in shared libraries on some systems, and on other systems + e->pdr.adr is sometimes offset by a bogus value. + To work around these problems, we replace e->pdr.adr with + the start address of the function. */ + e->pdr.adr = BLOCK_START (b); + + /* Correct incorrect setjmp procedure descriptor from the library + to make backtrace through setjmp work. */ + if (e->pdr.pcreg == 0 && STREQ (sh_name, "setjmp")) + { + complain (&bad_setjmp_pdr_complaint, 0); + e->pdr.pcreg = RA_REGNUM; + e->pdr.regmask = 0x80000000; + e->pdr.regoffset = -4; + } + } + + /* It would be reasonable that functions that have been compiled + without debugging info have a btNil type for their return value, + and functions that are void and are compiled with debugging info + have btVoid. + gcc and DEC f77 put out btNil types for both cases, so btNil is mapped + to TYPE_CODE_VOID in parse_type to get the `compiled with debugging info' + case right. + The glevel field in cur_fdr could be used to determine the presence + of debugging info, but GCC doesn't always pass the -g switch settings + to the assembler and GAS doesn't set the glevel field from the -g switch + settings. + To work around these problems, the return value type of a TYPE_CODE_VOID + function is adjusted accordingly if no debugging info was found in the + compilation unit. */ + + if (processing_gcc_compilation == 0 + && found_ecoff_debugging_info == 0 + && TYPE_CODE (TYPE_TARGET_TYPE (SYMBOL_TYPE (s))) == TYPE_CODE_VOID) + SYMBOL_TYPE (s) = nodebug_func_symbol_type; +} + +/* Relocate the extra function info pointed to by the symbol table. */ + +void +ecoff_relocate_efi (sym, delta) + struct symbol *sym; + CORE_ADDR delta; +{ + struct mips_extra_func_info *e; + + e = (struct mips_extra_func_info *) SYMBOL_VALUE (sym); + + e->pdr.adr += delta; +} + +/* Parse the external symbol ES. Just call parse_symbol() after + making sure we know where the aux are for it. + BIGEND says whether aux entries are big-endian or little-endian. + + This routine clobbers top_stack->cur_block and ->cur_st. */ + +static void parse_external PARAMS ((EXTR *, int, struct section_offsets *)); + +static void +parse_external (es, bigend, section_offsets) + EXTR *es; + int bigend; + struct section_offsets *section_offsets; +{ + union aux_ext *ax; + + if (es->ifd != ifdNil) + { + cur_fd = es->ifd; + cur_fdr = debug_info->fdr + cur_fd; + ax = debug_info->external_aux + cur_fdr->iauxBase; + } + else + { + cur_fdr = debug_info->fdr; + ax = 0; + } + + /* Reading .o files */ + if (SC_IS_UNDEF(es->asym.sc) || es->asym.sc == scNil) + { + char *what; + switch (es->asym.st) + { + case stNil: + /* These are generated for static symbols in .o files, + ignore them. */ + return; + case stStaticProc: + case stProc: + what = "procedure"; + n_undef_procs++; + break; + case stGlobal: + what = "variable"; + n_undef_vars++; + break; + case stLabel: + what = "label"; + n_undef_labels++; + break; + default: + what = "symbol"; + break; + } + n_undef_symbols++; + /* FIXME: Turn this into a complaint? */ + if (info_verbose) + printf_filtered ("Warning: %s `%s' is undefined (in %s)\n", + what, debug_info->ssext + es->asym.iss, + fdr_name (cur_fdr)); + return; + } + + switch (es->asym.st) + { + case stProc: + case stStaticProc: + /* There is no need to parse the external procedure symbols. + If they are from objects compiled without -g, their index will + be indexNil, and the symbol definition from the minimal symbol + is preferrable (yielding a function returning int instead of int). + If the index points to a local procedure symbol, the local + symbol already provides the correct type. + Note that the index of the external procedure symbol points + to the local procedure symbol in the local symbol table, and + _not_ to the auxiliary symbol info. */ + break; + case stGlobal: + case stLabel: + /* Global common symbols are resolved by the runtime loader, + ignore them. */ + if (SC_IS_COMMON(es->asym.sc)) + break; + + /* Note that the case of a symbol with indexNil must be handled + anyways by parse_symbol(). */ + parse_symbol (&es->asym, ax, (char *) NULL, bigend, section_offsets); + break; + default: + break; + } +} + +/* Parse the line number info for file descriptor FH into + GDB's linetable LT. MIPS' encoding requires a little bit + of magic to get things out. Note also that MIPS' line + numbers can go back and forth, apparently we can live + with that and do not need to reorder our linetables */ + +static void parse_lines PARAMS ((FDR *, PDR *, struct linetable *, int, + struct partial_symtab *, CORE_ADDR)); + +static void +parse_lines (fh, pr, lt, maxlines, pst, lowest_pdr_addr) + FDR *fh; + PDR *pr; + struct linetable *lt; + int maxlines; + struct partial_symtab *pst; + CORE_ADDR lowest_pdr_addr; +{ + unsigned char *base; + int j, k; + int delta, count, lineno = 0; + + if (fh->cbLine == 0) + return; + + /* Scan by procedure descriptors */ + k = 0; + for (j = 0; j < fh->cpd; j++, pr++) + { + CORE_ADDR l; + CORE_ADDR adr; + unsigned char *halt; + + /* No code for this one */ + if (pr->iline == ilineNil || + pr->lnLow == -1 || pr->lnHigh == -1) + continue; + + /* Determine start and end address of compressed line bytes for + this procedure. */ + base = debug_info->line + fh->cbLineOffset; + if (j != (fh->cpd - 1)) + halt = base + pr[1].cbLineOffset; + else + halt = base + fh->cbLine; + base += pr->cbLineOffset; + + adr = pst->textlow + pr->adr - lowest_pdr_addr; + + l = adr >> 2; /* in words */ + for (lineno = pr->lnLow; base < halt; ) + { + count = *base & 0x0f; + delta = *base++ >> 4; + if (delta >= 8) + delta -= 16; + if (delta == -8) + { + delta = (base[0] << 8) | base[1]; + if (delta >= 0x8000) + delta -= 0x10000; + base += 2; + } + lineno += delta; /* first delta is 0 */ + + /* Complain if the line table overflows. Could happen + with corrupt binaries. */ + if (lt->nitems >= maxlines) + { + complain (&bad_linetable_guess_complaint, fdr_name (fh)); + break; + } + k = add_line (lt, lineno, l, k); + l += count + 1; + } + } +} + +/* Master parsing procedure for first-pass reading of file symbols + into a partial_symtab. */ + +static void +parse_partial_symbols (objfile, section_offsets) + struct objfile *objfile; + struct section_offsets *section_offsets; +{ + const bfd_size_type external_sym_size = debug_swap->external_sym_size; + const bfd_size_type external_rfd_size = debug_swap->external_rfd_size; + const bfd_size_type external_ext_size = debug_swap->external_ext_size; + void (* const swap_ext_in) PARAMS ((bfd *, PTR, EXTR *)) + = debug_swap->swap_ext_in; + void (* const swap_sym_in) PARAMS ((bfd *, PTR, SYMR *)) + = debug_swap->swap_sym_in; + void (* const swap_rfd_in) PARAMS ((bfd *, PTR, RFDT *)) + = debug_swap->swap_rfd_in; + int f_idx, s_idx; + HDRR *hdr = &debug_info->symbolic_header; + /* Running pointers */ + FDR *fh; + char *ext_out; + char *ext_out_end; + EXTR *ext_block; + register EXTR *ext_in; + EXTR *ext_in_end; + SYMR sh; + struct partial_symtab *pst; + int textlow_not_set = 1; + int past_first_source_file = 0; + + /* List of current psymtab's include files */ + char **psymtab_include_list; + int includes_allocated; + int includes_used; + EXTR *extern_tab; + struct pst_map *fdr_to_pst; + /* Index within current psymtab dependency list */ + struct partial_symtab **dependency_list; + int dependencies_used, dependencies_allocated; + struct cleanup *old_chain; + char *name; + enum language prev_language; + asection *text_sect; + int relocatable = 0; + + /* Irix 5.2 shared libraries have a fh->adr field of zero, but + the shared libraries are prelinked at a high memory address. + We have to adjust the start address of the object file for this case, + by setting it to the start address of the first procedure in the file. + But we should do no adjustments if we are debugging a .o file, where + the text section (and fh->adr) really starts at zero. */ + text_sect = bfd_get_section_by_name (cur_bfd, ".text"); + if (text_sect != NULL + && (bfd_get_section_flags (cur_bfd, text_sect) & SEC_RELOC)) + relocatable = 1; + + extern_tab = (EXTR *) obstack_alloc (&objfile->psymbol_obstack, + sizeof (EXTR) * hdr->iextMax); + + includes_allocated = 30; + includes_used = 0; + psymtab_include_list = (char **) alloca (includes_allocated * + sizeof (char *)); + next_symbol_text_func = mdebug_next_symbol_text; + + dependencies_allocated = 30; + dependencies_used = 0; + dependency_list = + (struct partial_symtab **) alloca (dependencies_allocated * + sizeof (struct partial_symtab *)); + + last_source_file = NULL; + + /* + * Big plan: + * + * Only parse the Local and External symbols, and the Relative FDR. + * Fixup enough of the loader symtab to be able to use it. + * Allocate space only for the file's portions we need to + * look at. (XXX) + */ + + max_gdbinfo = 0; + max_glevel = MIN_GLEVEL; + + /* Allocate the map FDR -> PST. + Minor hack: -O3 images might claim some global data belongs + to FDR -1. We`ll go along with that */ + fdr_to_pst = (struct pst_map *) xzalloc ((hdr->ifdMax + 1) * sizeof *fdr_to_pst); + old_chain = make_cleanup (free, fdr_to_pst); + fdr_to_pst++; + { + struct partial_symtab *pst = new_psymtab ("", objfile, section_offsets); + fdr_to_pst[-1].pst = pst; + FDR_IDX (pst) = -1; + } + + /* Allocate the global pending list. */ + pending_list = + ((struct mdebug_pending **) + obstack_alloc (&objfile->psymbol_obstack, + hdr->ifdMax * sizeof (struct mdebug_pending *))); + memset ((PTR) pending_list, 0, + hdr->ifdMax * sizeof (struct mdebug_pending *)); + + /* Pass 0 over external syms: swap them in. */ + ext_block = (EXTR *) xmalloc (hdr->iextMax * sizeof (EXTR)); + make_cleanup (free, ext_block); + + ext_out = (char *) debug_info->external_ext; + ext_out_end = ext_out + hdr->iextMax * external_ext_size; + ext_in = ext_block; + for (; ext_out < ext_out_end; ext_out += external_ext_size, ext_in++) + (*swap_ext_in) (cur_bfd, ext_out, ext_in); + + /* Pass 1 over external syms: Presize and partition the list */ + ext_in = ext_block; + ext_in_end = ext_in + hdr->iextMax; + for (; ext_in < ext_in_end; ext_in++) + { + /* See calls to complain below. */ + if (ext_in->ifd >= -1 + && ext_in->ifd < hdr->ifdMax + && ext_in->asym.iss >= 0 + && ext_in->asym.iss < hdr->issExtMax) + fdr_to_pst[ext_in->ifd].n_globals++; + } + + /* Pass 1.5 over files: partition out global symbol space */ + s_idx = 0; + for (f_idx = -1; f_idx < hdr->ifdMax; f_idx++) + { + fdr_to_pst[f_idx].globals_offset = s_idx; + s_idx += fdr_to_pst[f_idx].n_globals; + fdr_to_pst[f_idx].n_globals = 0; + } + + /* ECOFF in ELF: + + For ECOFF in ELF, we skip the creation of the minimal symbols. + The ECOFF symbols should be a subset of the Elf symbols, and the + section information of the elf symbols will be more accurate. + FIXME! What about Irix 5's native linker? + + By default, Elf sections which don't exist in ECOFF + get put in ECOFF's absolute section by the gnu linker. + Since absolute sections don't get relocated, we + end up calculating an address different from that of + the symbol's minimal symbol (created earlier from the + Elf symtab). + + To fix this, either : + 1) don't create the duplicate symbol + (assumes ECOFF symtab is a subset of the ELF symtab; + assumes no side-effects result from ignoring ECOFF symbol) + 2) create it, only if lookup for existing symbol in ELF's minimal + symbols fails + (inefficient; + assumes no side-effects result from ignoring ECOFF symbol) + 3) create it, but lookup ELF's minimal symbol and use it's section + during relocation, then modify "uniqify" phase to merge and + eliminate the duplicate symbol + (highly inefficient) + + I've implemented #1 here... + Skip the creation of the minimal symbols based on the ECOFF + symbol table. */ + + /* Pass 2 over external syms: fill in external symbols */ + ext_in = ext_block; + ext_in_end = ext_in + hdr->iextMax; + for (; ext_in < ext_in_end; ext_in++) + { + enum minimal_symbol_type ms_type = mst_text; + CORE_ADDR svalue = ext_in->asym.value; + + /* The Irix 5 native tools seem to sometimes generate bogus + external symbols. */ + if (ext_in->ifd < -1 || ext_in->ifd >= hdr->ifdMax) + { + complain (&bad_ext_ifd_complaint, ext_in->ifd, hdr->ifdMax); + continue; + } + if (ext_in->asym.iss < 0 || ext_in->asym.iss >= hdr->issExtMax) + { + complain (&bad_ext_iss_complaint, ext_in->asym.iss, + hdr->issExtMax); + continue; + } + + extern_tab[fdr_to_pst[ext_in->ifd].globals_offset + + fdr_to_pst[ext_in->ifd].n_globals++] = *ext_in; + + + if (SC_IS_UNDEF(ext_in->asym.sc) || ext_in->asym.sc == scNil) + continue; + + + /* Pass 3 over files, over local syms: fill in static symbols */ + name = debug_info->ssext + ext_in->asym.iss; + + /* Process ECOFF Symbol Types and Storage Classes */ + switch (ext_in->asym.st) + { + case stProc: + /* Beginnning of Procedure */ + svalue += ANOFFSET (section_offsets, SECT_OFF_TEXT); + break; + case stStaticProc: + /* Load time only static procs */ + ms_type = mst_file_text; + svalue += ANOFFSET (section_offsets, SECT_OFF_TEXT); + break; + case stGlobal: + /* External symbol */ + if (SC_IS_COMMON (ext_in->asym.sc)) + { + /* The value of a common symbol is its size, not its address. + Ignore it. */ + continue; + } + else if (SC_IS_DATA (ext_in->asym.sc)) + { + ms_type = mst_data; + svalue += ANOFFSET (section_offsets, SECT_OFF_DATA); + } + else if (SC_IS_BSS (ext_in->asym.sc)) + { + ms_type = mst_bss; + svalue += ANOFFSET (section_offsets, SECT_OFF_BSS); + } + else + ms_type = mst_abs; + break; + case stLabel: + /* Label */ + if (SC_IS_TEXT (ext_in->asym.sc)) + { + ms_type = mst_file_text; + svalue += ANOFFSET (section_offsets, SECT_OFF_TEXT); + } + else if (SC_IS_DATA (ext_in->asym.sc)) + { + ms_type = mst_file_data; + svalue += ANOFFSET (section_offsets, SECT_OFF_DATA); + } + else if (SC_IS_BSS (ext_in->asym.sc)) + { + ms_type = mst_file_bss; + svalue += ANOFFSET (section_offsets, SECT_OFF_BSS); + } + else + ms_type = mst_abs; + break; + case stLocal: + case stNil: + /* The alpha has the section start addresses in stLocal symbols + whose name starts with a `.'. Skip those but complain for all + other stLocal symbols. + Irix6 puts the section start addresses in stNil symbols, skip + those too.*/ + if (name[0] == '.') + continue; + /* Fall through. */ + default: + ms_type = mst_unknown; + complain (&unknown_ext_complaint, name); + } + if (!ECOFF_IN_ELF(cur_bfd)) + prim_record_minimal_symbol (name, svalue, ms_type, objfile); + } + + /* Pass 3 over files, over local syms: fill in static symbols */ + for (f_idx = 0; f_idx < hdr->ifdMax; f_idx++) + { + struct partial_symtab *save_pst; + EXTR *ext_ptr; + CORE_ADDR textlow; + + cur_fdr = fh = debug_info->fdr + f_idx; + + if (fh->csym == 0) + { + fdr_to_pst[f_idx].pst = NULL; + continue; + } + + /* Determine the start address for this object file from the + file header and relocate it, except for Irix 5.2 zero fh->adr. */ + if (fh->cpd) + { + textlow = fh->adr; + if (relocatable || textlow != 0) + textlow += ANOFFSET (section_offsets, SECT_OFF_TEXT); + } + else + textlow = 0; + pst = start_psymtab_common (objfile, section_offsets, + fdr_name (fh), + textlow, + objfile->global_psymbols.next, + objfile->static_psymbols.next); + pst->read_symtab_private = ((char *) + obstack_alloc (&objfile->psymbol_obstack, + sizeof (struct symloc))); + memset ((PTR) pst->read_symtab_private, 0, sizeof (struct symloc)); + + save_pst = pst; + FDR_IDX (pst) = f_idx; + CUR_BFD (pst) = cur_bfd; + DEBUG_SWAP (pst) = debug_swap; + DEBUG_INFO (pst) = debug_info; + PENDING_LIST (pst) = pending_list; + + /* The way to turn this into a symtab is to call... */ + pst->read_symtab = mdebug_psymtab_to_symtab; + + /* Set up language for the pst. + The language from the FDR is used if it is unambigious (e.g. cfront + with native cc and g++ will set the language to C). + Otherwise we have to deduce the language from the filename. + Native ecoff has every header file in a separate FDR, so + deduce_language_from_filename will return language_unknown for + a header file, which is not what we want. + But the FDRs for the header files are after the FDR for the source + file, so we can assign the language of the source file to the + following header files. Then we save the language in the private + pst data so that we can reuse it when building symtabs. */ + prev_language = psymtab_language; + + switch (fh->lang) + { + case langCplusplusV2: + psymtab_language = language_cplus; + break; + default: + psymtab_language = deduce_language_from_filename (fdr_name (fh)); + break; + } + if (psymtab_language == language_unknown) + psymtab_language = prev_language; + PST_PRIVATE (pst)->pst_language = psymtab_language; + + pst->texthigh = pst->textlow; + + /* For stabs-in-ecoff files, the second symbol must be @stab. + This symbol is emitted by mips-tfile to signal that the + current object file uses encapsulated stabs instead of mips + ecoff for local symbols. (It is the second symbol because + the first symbol is the stFile used to signal the start of a + file). */ + processing_gcc_compilation = 0; + if (fh->csym >= 2) + { + (*swap_sym_in) (cur_bfd, + ((char *) debug_info->external_sym + + (fh->isymBase + 1) * external_sym_size), + &sh); + if (STREQ (debug_info->ss + fh->issBase + sh.iss, stabs_symbol)) + processing_gcc_compilation = 2; + } + + if (processing_gcc_compilation != 0) + { + for (cur_sdx = 2; cur_sdx < fh->csym; cur_sdx++) + { + int type_code; + char *namestring; + + (*swap_sym_in) (cur_bfd, + (((char *) debug_info->external_sym) + + (fh->isymBase + cur_sdx) * external_sym_size), + &sh); + type_code = ECOFF_UNMARK_STAB (sh.index); + if (!ECOFF_IS_STAB (&sh)) + { + if (sh.st == stProc || sh.st == stStaticProc) + { + CORE_ADDR procaddr; + long isym; + + sh.value += ANOFFSET (section_offsets, SECT_OFF_TEXT); + if (sh.st == stStaticProc) + { + namestring = debug_info->ss + fh->issBase + sh.iss; + prim_record_minimal_symbol_and_info (namestring, + sh.value, + mst_file_text, + NULL, + SECT_OFF_TEXT, + NULL, + objfile); + } + procaddr = sh.value; + + isym = AUX_GET_ISYM (fh->fBigendian, + (debug_info->external_aux + + fh->iauxBase + + sh.index)); + (*swap_sym_in) (cur_bfd, + ((char *) debug_info->external_sym + + ((fh->isymBase + isym - 1) + * external_sym_size)), + &sh); + if (sh.st == stEnd) + { + CORE_ADDR high = procaddr + sh.value; + + /* Kludge for Irix 5.2 zero fh->adr. */ + if (!relocatable + && (pst->textlow == 0 || procaddr < pst->textlow)) + pst->textlow = procaddr; + if (high > pst->texthigh) + pst->texthigh = high; + } + } + else if (sh.st == stStatic) + { + switch (sh.sc) + { + case scUndefined: + case scSUndefined: + case scNil: + case scAbs: + break; + + case scData: + case scSData: + case scRData: + case scPData: + case scXData: + namestring = debug_info->ss + fh->issBase + sh.iss; + sh.value += ANOFFSET (section_offsets, SECT_OFF_DATA); + prim_record_minimal_symbol_and_info (namestring, + sh.value, + mst_file_data, + NULL, + SECT_OFF_DATA, + NULL, + objfile); + break; + + default: + /* FIXME! Shouldn't this use cases for bss, + then have the default be abs? */ + namestring = debug_info->ss + fh->issBase + sh.iss; + sh.value += ANOFFSET (section_offsets, SECT_OFF_BSS); + prim_record_minimal_symbol_and_info (namestring, + sh.value, + mst_file_bss, + NULL, + SECT_OFF_BSS, + NULL, + objfile); + break; + } + } + continue; + } + /* Handle stabs continuation */ + { + char *stabstring = debug_info->ss + fh->issBase + sh.iss; + int len = strlen (stabstring); + while (stabstring[len-1] == '\\') + { + SYMR sh2; + char *stabstring1 = stabstring; + char *stabstring2; + int len2; + + /* Ignore continuation char from 1st string */ + len--; + + /* Read next stabstring */ + cur_sdx++; + (*swap_sym_in) (cur_bfd, + (((char *) debug_info->external_sym) + + (fh->isymBase + cur_sdx) + * external_sym_size), + &sh2); + stabstring2 = debug_info->ss + fh->issBase + sh2.iss; + len2 = strlen (stabstring2); + + /* Concatinate stabstring2 with stabstring1 */ + if (stabstring + && stabstring != debug_info->ss + fh->issBase + sh.iss) + stabstring = xrealloc (stabstring, len + len2 + 1); + else + stabstring = xmalloc (len + len2 + 1); + strcpy (stabstring, stabstring1); + strcpy (stabstring + len, stabstring2); + len += len2; + } + +#define SET_NAMESTRING() \ + namestring = stabstring +#define CUR_SYMBOL_TYPE type_code +#define CUR_SYMBOL_VALUE sh.value +#define START_PSYMTAB(ofile,secoff,fname,low,symoff,global_syms,static_syms)\ + pst = save_pst +#define END_PSYMTAB(pst,ilist,ninc,c_off,c_text,dep_list,n_deps,textlow_not_set) (void)0 +#define HANDLE_RBRAC(val) \ + if ((val) > save_pst->texthigh) save_pst->texthigh = (val); +#include "partial-stab.h" + + if (stabstring + && stabstring != debug_info->ss + fh->issBase + sh.iss) + free (stabstring); + } + /* end - Handle continuation */ + } + } + else + { + for (cur_sdx = 0; cur_sdx < fh->csym;) + { + char *name; + enum address_class class; + + (*swap_sym_in) (cur_bfd, + ((char *) debug_info->external_sym + + ((fh->isymBase + cur_sdx) + * external_sym_size)), + &sh); + + if (ECOFF_IS_STAB (&sh)) + { + cur_sdx++; + continue; + } + + /* Non absolute static symbols go into the minimal table. */ + if (SC_IS_UNDEF(sh.sc) || sh.sc == scNil + || (sh.index == indexNil + && (sh.st != stStatic || sh.sc == scAbs))) + { + /* FIXME, premature? */ + cur_sdx++; + continue; + } + + name = debug_info->ss + fh->issBase + sh.iss; + + switch (sh.sc) + { + case scText: + case scRConst: + /* The value of a stEnd symbol is the displacement from the + corresponding start symbol value, do not relocate it. */ + if (sh.st != stEnd) + sh.value += ANOFFSET (section_offsets, SECT_OFF_TEXT); + break; + case scData: + case scSData: + case scRData: + case scPData: + case scXData: + sh.value += ANOFFSET (section_offsets, SECT_OFF_DATA); + break; + case scBss: + case scSBss: + sh.value += ANOFFSET (section_offsets, SECT_OFF_BSS); + break; + } + + switch (sh.st) + { + CORE_ADDR high; + CORE_ADDR procaddr; + int new_sdx; + + case stStaticProc: + prim_record_minimal_symbol_and_info (name, sh.value, + mst_file_text, NULL, + SECT_OFF_TEXT, NULL, + objfile); + + /* FALLTHROUGH */ + + case stProc: + /* Usually there is a local and a global stProc symbol + for a function. This means that the function name + has already been entered into the mimimal symbol table + while processing the global symbols in pass 2 above. + One notable exception is the PROGRAM name from + f77 compiled executables, it is only put out as + local stProc symbol, and a global MAIN__ stProc symbol + points to it. It doesn't matter though, as gdb is + still able to find the PROGRAM name via the partial + symbol table, and the MAIN__ symbol via the minimal + symbol table. */ + if (sh.st == stProc) + add_psymbol_to_list (name, strlen (name), + VAR_NAMESPACE, LOC_BLOCK, + &objfile->global_psymbols, + 0, sh.value, psymtab_language, objfile); + else + add_psymbol_to_list (name, strlen (name), + VAR_NAMESPACE, LOC_BLOCK, + &objfile->static_psymbols, + 0, sh.value, psymtab_language, objfile); + + /* Skip over procedure to next one. */ + if (sh.index >= hdr->iauxMax) + { + /* Should not happen, but does when cross-compiling + with the MIPS compiler. FIXME -- pull later. */ + complain (&index_complaint, name); + new_sdx = cur_sdx + 1; /* Don't skip at all */ + } + else + new_sdx = AUX_GET_ISYM (fh->fBigendian, + (debug_info->external_aux + + fh->iauxBase + + sh.index)); + procaddr = sh.value; + + if (new_sdx <= cur_sdx) + { + /* This should not happen either... FIXME. */ + complain (&aux_index_complaint, name); + new_sdx = cur_sdx + 1; /* Don't skip backward */ + } + + cur_sdx = new_sdx; + (*swap_sym_in) (cur_bfd, + ((char *) debug_info->external_sym + + ((fh->isymBase + cur_sdx - 1) + * external_sym_size)), + &sh); + if (sh.st != stEnd) + continue; + + /* Kludge for Irix 5.2 zero fh->adr. */ + if (!relocatable + && (pst->textlow == 0 || procaddr < pst->textlow)) + pst->textlow = procaddr; + + high = procaddr + sh.value; + if (high > pst->texthigh) + pst->texthigh = high; + continue; + + case stStatic: /* Variable */ + if (SC_IS_DATA (sh.sc)) + prim_record_minimal_symbol_and_info (name, sh.value, + mst_file_data, NULL, + SECT_OFF_DATA, + NULL, + objfile); + else + prim_record_minimal_symbol_and_info (name, sh.value, + mst_file_bss, NULL, + SECT_OFF_BSS, + NULL, + objfile); + class = LOC_STATIC; + break; + + case stIndirect:/* Irix5 forward declaration */ + /* Skip forward declarations from Irix5 cc */ + goto skip; + + case stTypedef:/* Typedef */ + /* Skip typedefs for forward declarations and opaque + structs from alpha and mips cc. */ + if (sh.iss == 0 || has_opaque_xref (fh, &sh)) + goto skip; + class = LOC_TYPEDEF; + break; + + case stConstant: /* Constant decl */ + class = LOC_CONST; + break; + + case stUnion: + case stStruct: + case stEnum: + case stBlock: /* { }, str, un, enum*/ + /* Do not create a partial symbol for cc unnamed aggregates + and gcc empty aggregates. */ + if ((sh.sc == scInfo + || SC_IS_COMMON(sh.sc)) + && sh.iss != 0 + && sh.index != cur_sdx + 2) + { + add_psymbol_to_list (name, strlen (name), + STRUCT_NAMESPACE, LOC_TYPEDEF, + &objfile->static_psymbols, + 0, (CORE_ADDR) 0, + psymtab_language, objfile); + } + handle_psymbol_enumerators (objfile, fh, sh.st, sh.value); + + /* Skip over the block */ + new_sdx = sh.index; + if (new_sdx <= cur_sdx) + { + /* This happens with the Ultrix kernel. */ + complain (&block_index_complaint, name); + new_sdx = cur_sdx + 1; /* Don't skip backward */ + } + cur_sdx = new_sdx; + continue; + + case stFile: /* File headers */ + case stLabel: /* Labels */ + case stEnd: /* Ends of files */ + goto skip; + + case stLocal: /* Local variables */ + /* Normally these are skipped because we skip over + all blocks we see. However, these can occur + as visible symbols in a .h file that contains code. */ + goto skip; + + default: + /* Both complaints are valid: one gives symbol name, + the other the offending symbol type. */ + complain (&unknown_sym_complaint, name); + complain (&unknown_st_complaint, sh.st); + cur_sdx++; + continue; + } + /* Use this gdb symbol */ + add_psymbol_to_list (name, strlen (name), + VAR_NAMESPACE, class, + &objfile->static_psymbols, + 0, sh.value, psymtab_language, objfile); + skip: + cur_sdx++; /* Go to next file symbol */ + } + + /* Now do enter the external symbols. */ + ext_ptr = &extern_tab[fdr_to_pst[f_idx].globals_offset]; + cur_sdx = fdr_to_pst[f_idx].n_globals; + PST_PRIVATE (save_pst)->extern_count = cur_sdx; + PST_PRIVATE (save_pst)->extern_tab = ext_ptr; + for (; --cur_sdx >= 0; ext_ptr++) + { + enum address_class class; + SYMR *psh; + char *name; + CORE_ADDR svalue; + + if (ext_ptr->ifd != f_idx) + abort (); + psh = &ext_ptr->asym; + + /* Do not add undefined symbols to the partial symbol table. */ + if (SC_IS_UNDEF(psh->sc) || psh->sc == scNil) + continue; + + svalue = psh->value; + switch (psh->sc) + { + case scText: + case scRConst: + svalue += ANOFFSET (section_offsets, SECT_OFF_TEXT); + break; + case scData: + case scSData: + case scRData: + case scPData: + case scXData: + svalue += ANOFFSET (section_offsets, SECT_OFF_DATA); + break; + case scBss: + case scSBss: + svalue += ANOFFSET (section_offsets, SECT_OFF_BSS); + break; + } + + switch (psh->st) + { + case stNil: + /* These are generated for static symbols in .o files, + ignore them. */ + continue; + case stProc: + case stStaticProc: + /* External procedure symbols have been entered + into the minimal symbol table in pass 2 above. + Ignore them, as parse_external will ignore them too. */ + continue; + case stLabel: + class = LOC_LABEL; + break; + default: + complain (&unknown_ext_complaint, + debug_info->ssext + psh->iss); + /* Fall through, pretend it's global. */ + case stGlobal: + /* Global common symbols are resolved by the runtime loader, + ignore them. */ + if (SC_IS_COMMON(psh->sc)) + continue; + + class = LOC_STATIC; + break; + } + name = debug_info->ssext + psh->iss; + add_psymbol_to_list (name, strlen (name), + VAR_NAMESPACE, class, + &objfile->global_psymbols, + 0, svalue, + psymtab_language, objfile); + } + } + + /* Link pst to FDR. end_psymtab returns NULL if the psymtab was + empty and put on the free list. */ + fdr_to_pst[f_idx].pst = end_psymtab (save_pst, + psymtab_include_list, includes_used, + -1, save_pst->texthigh, + dependency_list, dependencies_used, textlow_not_set); + includes_used = 0; + dependencies_used = 0; + + if (objfile->ei.entry_point >= save_pst->textlow && + objfile->ei.entry_point < save_pst->texthigh) + { + objfile->ei.entry_file_lowpc = save_pst->textlow; + objfile->ei.entry_file_highpc = save_pst->texthigh; + } + + /* The objfile has its functions reordered if this partial symbol + table overlaps any other partial symbol table. + We cannot assume a reordered objfile if a partial symbol table + is contained within another partial symbol table, as partial symbol + tables for include files with executable code are contained + within the partial symbol table for the including source file, + and we do not want to flag the objfile reordered for these cases. + + This strategy works well for Irix-5.2 shared libraries, but we + might have to use a more elaborate (and slower) algorithm for + other cases. */ + save_pst = fdr_to_pst[f_idx].pst; + if (save_pst != NULL + && save_pst->textlow != 0 + && !(objfile->flags & OBJF_REORDERED)) + { + ALL_OBJFILE_PSYMTABS (objfile, pst) + { + if (save_pst != pst + && save_pst->textlow >= pst->textlow + && save_pst->textlow < pst->texthigh + && save_pst->texthigh > pst->texthigh) + { + objfile->flags |= OBJF_REORDERED; + break; + } + } + } + } + + /* Now scan the FDRs for dependencies */ + for (f_idx = 0; f_idx < hdr->ifdMax; f_idx++) + { + fh = f_idx + debug_info->fdr; + pst = fdr_to_pst[f_idx].pst; + + if (pst == (struct partial_symtab *)NULL) + continue; + + /* This should catch stabs-in-ecoff. */ + if (fh->crfd <= 1) + continue; + + /* Skip the first file indirect entry as it is a self dependency + for source files or a reverse .h -> .c dependency for header files. */ + pst->number_of_dependencies = 0; + pst->dependencies = + ((struct partial_symtab **) + obstack_alloc (&objfile->psymbol_obstack, + ((fh->crfd - 1) + * sizeof (struct partial_symtab *)))); + for (s_idx = 1; s_idx < fh->crfd; s_idx++) + { + RFDT rh; + + (*swap_rfd_in) (cur_bfd, + ((char *) debug_info->external_rfd + + (fh->rfdBase + s_idx) * external_rfd_size), + &rh); + if (rh < 0 || rh >= hdr->ifdMax) + { + complain (&bad_file_number_complaint, rh); + continue; + } + + /* Skip self dependencies of header files. */ + if (rh == f_idx) + continue; + + /* Do not add to dependeny list if psymtab was empty. */ + if (fdr_to_pst[rh].pst == (struct partial_symtab *)NULL) + continue; + pst->dependencies[pst->number_of_dependencies++] = fdr_to_pst[rh].pst; + } + } + + /* Remove the dummy psymtab created for -O3 images above, if it is + still empty, to enable the detection of stripped executables. */ + if (objfile->psymtabs->next == NULL + && objfile->psymtabs->number_of_dependencies == 0 + && objfile->psymtabs->n_global_syms == 0 + && objfile->psymtabs->n_static_syms == 0) + objfile->psymtabs = NULL; + do_cleanups (old_chain); +} + +/* If the current psymbol has an enumerated type, we need to add + all the the enum constants to the partial symbol table. */ + +static void +handle_psymbol_enumerators (objfile, fh, stype, svalue) + struct objfile *objfile; + FDR *fh; + int stype; + CORE_ADDR svalue; +{ + const bfd_size_type external_sym_size = debug_swap->external_sym_size; + void (* const swap_sym_in) PARAMS ((bfd *, PTR, SYMR *)) + = debug_swap->swap_sym_in; + char *ext_sym = ((char *) debug_info->external_sym + + ((fh->isymBase + cur_sdx + 1) * external_sym_size)); + SYMR sh; + TIR tir; + + switch (stype) + { + case stEnum: + break; + + case stBlock: + /* It is an enumerated type if the next symbol entry is a stMember + and its auxiliary index is indexNil or its auxiliary entry + is a plain btNil or btVoid. + Alpha cc -migrate enums are recognized by a zero index and + a zero symbol value. + DU 4.0 cc enums are recognized by a member type of btEnum without + qualifiers and a zero symbol value. */ + (*swap_sym_in) (cur_bfd, ext_sym, &sh); + if (sh.st != stMember) + return; + + if (sh.index == indexNil + || (sh.index == 0 && svalue == 0)) + break; + (*debug_swap->swap_tir_in) (fh->fBigendian, + &(debug_info->external_aux + + fh->iauxBase + sh.index)->a_ti, + &tir); + if ((tir.bt != btNil + && tir.bt != btVoid + && (tir.bt != btEnum || svalue != 0)) + || tir.tq0 != tqNil) + return; + break; + + default: + return; + } + + for (;;) + { + char *name; + + (*swap_sym_in) (cur_bfd, ext_sym, &sh); + if (sh.st != stMember) + break; + name = debug_info->ss + cur_fdr->issBase + sh.iss; + + /* Note that the value doesn't matter for enum constants + in psymtabs, just in symtabs. */ + add_psymbol_to_list (name, strlen (name), + VAR_NAMESPACE, LOC_CONST, + &objfile->static_psymbols, 0, + (CORE_ADDR) 0, psymtab_language, objfile); + ext_sym += external_sym_size; + } +} + +static char * +mdebug_next_symbol_text (objfile) + struct objfile *objfile; /* argument objfile is currently unused */ +{ + SYMR sh; + + cur_sdx++; + (*debug_swap->swap_sym_in) (cur_bfd, + ((char *) debug_info->external_sym + + ((cur_fdr->isymBase + cur_sdx) + * debug_swap->external_sym_size)), + &sh); + return debug_info->ss + cur_fdr->issBase + sh.iss; +} + +/* Ancillary function to psymtab_to_symtab(). Does all the work + for turning the partial symtab PST into a symtab, recurring + first on all dependent psymtabs. The argument FILENAME is + only passed so we can see in debug stack traces what file + is being read. + + This function has a split personality, based on whether the + symbol table contains ordinary ecoff symbols, or stabs-in-ecoff. + The flow of control and even the memory allocation differs. FIXME. */ + +static void +psymtab_to_symtab_1 (pst, filename) + struct partial_symtab *pst; + char *filename; +{ + bfd_size_type external_sym_size; + bfd_size_type external_pdr_size; + void (*swap_sym_in) PARAMS ((bfd *, PTR, SYMR *)); + void (*swap_pdr_in) PARAMS ((bfd *, PTR, PDR *)); + int i; + struct symtab *st; + FDR *fh; + struct linetable *lines; + CORE_ADDR lowest_pdr_addr = 0; + + if (pst->readin) + return; + pst->readin = 1; + + /* Read in all partial symbtabs on which this one is dependent. + NOTE that we do have circular dependencies, sigh. We solved + that by setting pst->readin before this point. */ + + for (i = 0; i < pst->number_of_dependencies; i++) + if (!pst->dependencies[i]->readin) + { + /* Inform about additional files to be read in. */ + if (info_verbose) + { + fputs_filtered (" ", gdb_stdout); + wrap_here (""); + fputs_filtered ("and ", gdb_stdout); + wrap_here (""); + printf_filtered ("%s...", + pst->dependencies[i]->filename); + wrap_here (""); /* Flush output */ + gdb_flush (gdb_stdout); + } + /* We only pass the filename for debug purposes */ + psymtab_to_symtab_1 (pst->dependencies[i], + pst->dependencies[i]->filename); + } + + /* Do nothing if this is a dummy psymtab. */ + + if (pst->n_global_syms == 0 && pst->n_static_syms == 0 + && pst->textlow == 0 && pst->texthigh == 0) + return; + + /* Now read the symbols for this symtab */ + + cur_bfd = CUR_BFD (pst); + debug_swap = DEBUG_SWAP (pst); + debug_info = DEBUG_INFO (pst); + pending_list = PENDING_LIST (pst); + external_sym_size = debug_swap->external_sym_size; + external_pdr_size = debug_swap->external_pdr_size; + swap_sym_in = debug_swap->swap_sym_in; + swap_pdr_in = debug_swap->swap_pdr_in; + current_objfile = pst->objfile; + cur_fd = FDR_IDX (pst); + fh = ((cur_fd == -1) + ? (FDR *) NULL + : debug_info->fdr + cur_fd); + cur_fdr = fh; + + /* See comment in parse_partial_symbols about the @stabs sentinel. */ + processing_gcc_compilation = 0; + if (fh != (FDR *) NULL && fh->csym >= 2) + { + SYMR sh; + + (*swap_sym_in) (cur_bfd, + ((char *) debug_info->external_sym + + (fh->isymBase + 1) * external_sym_size), + &sh); + if (STREQ (debug_info->ss + fh->issBase + sh.iss, + stabs_symbol)) + { + /* We indicate that this is a GCC compilation so that certain + features will be enabled in stabsread/dbxread. */ + processing_gcc_compilation = 2; + } + } + + if (processing_gcc_compilation != 0) + { + + /* This symbol table contains stabs-in-ecoff entries. */ + + /* Parse local symbols first */ + + if (fh->csym <= 2) /* FIXME, this blows psymtab->symtab ptr */ + { + current_objfile = NULL; + return; + } + for (cur_sdx = 2; cur_sdx < fh->csym; cur_sdx++) + { + SYMR sh; + char *name; + CORE_ADDR valu; + + (*swap_sym_in) (cur_bfd, + (((char *) debug_info->external_sym) + + (fh->isymBase + cur_sdx) * external_sym_size), + &sh); + name = debug_info->ss + fh->issBase + sh.iss; + valu = sh.value; + /* XXX This is a hack. It will go away! */ + if (ECOFF_IS_STAB (&sh) || (name[0] == '#')) + { + int type_code = ECOFF_UNMARK_STAB (sh.index); + + /* We should never get non N_STAB symbols here, but they + should be harmless, so keep process_one_symbol from + complaining about them. */ + if (type_code & N_STAB) + { + process_one_symbol (type_code, 0, valu, name, + pst->section_offsets, pst->objfile); + } + /* Similarly a hack. */ + else if (name[0] == '#') + { + process_one_symbol (N_SLINE, 0, valu, name, + pst->section_offsets, pst->objfile); + } + if (type_code == N_FUN) + { + /* Make up special symbol to contain + procedure specific info */ + struct mips_extra_func_info *e = + ((struct mips_extra_func_info *) + obstack_alloc (¤t_objfile->symbol_obstack, + sizeof (struct mips_extra_func_info))); + struct symbol *s = new_symbol (MIPS_EFI_SYMBOL_NAME); + + memset ((PTR) e, 0, sizeof (struct mips_extra_func_info)); + SYMBOL_NAMESPACE (s) = LABEL_NAMESPACE; + SYMBOL_CLASS (s) = LOC_CONST; + SYMBOL_TYPE (s) = mdebug_type_void; + SYMBOL_VALUE (s) = (long) e; + e->pdr.framereg = -1; + add_symbol_to_list (s, &local_symbols); + } + } + else if (sh.st == stLabel) + { + if (sh.index == indexNil) + { + /* This is what the gcc2_compiled and __gnu_compiled_* + show up as. So don't complain. */ + ; + } + else + { + /* Handle encoded stab line number. */ + valu += ANOFFSET (pst->section_offsets, SECT_OFF_TEXT); + record_line (current_subfile, sh.index, valu); + } + } + else if (sh.st == stProc || sh.st == stStaticProc + || sh.st == stStatic || sh.st == stEnd) + /* These are generated by gcc-2.x, do not complain */ + ; + else + complain (&stab_unknown_complaint, name); + } + st = end_symtab (pst->texthigh, pst->objfile, SECT_OFF_TEXT); + end_stabs (); + + /* Sort the symbol table now, we are done adding symbols to it. + We must do this before parse_procedure calls lookup_symbol. */ + sort_symtab_syms (st); + + /* There used to be a call to sort_blocks here, but this should not + be necessary for stabs symtabs. And as sort_blocks modifies the + start address of the GLOBAL_BLOCK to the FIRST_LOCAL_BLOCK, + it did the wrong thing if the first procedure in a file was + generated via asm statements. */ + + /* Fill in procedure info next. */ + if (fh->cpd > 0) + { + PDR *pr_block; + struct cleanup *old_chain; + char *pdr_ptr; + char *pdr_end; + PDR *pdr_in; + PDR *pdr_in_end; + + pr_block = (PDR *) xmalloc (fh->cpd * sizeof (PDR)); + old_chain = make_cleanup (free, pr_block); + + pdr_ptr = ((char *) debug_info->external_pdr + + fh->ipdFirst * external_pdr_size); + pdr_end = pdr_ptr + fh->cpd * external_pdr_size; + pdr_in = pr_block; + for (; + pdr_ptr < pdr_end; + pdr_ptr += external_pdr_size, pdr_in++) + { + (*swap_pdr_in) (cur_bfd, pdr_ptr, pdr_in); + + /* Determine lowest PDR address, the PDRs are not always + sorted. */ + if (pdr_in == pr_block) + lowest_pdr_addr = pdr_in->adr; + else if (pdr_in->adr < lowest_pdr_addr) + lowest_pdr_addr = pdr_in->adr; + } + + pdr_in = pr_block; + pdr_in_end = pdr_in + fh->cpd; + for (; pdr_in < pdr_in_end; pdr_in++) + parse_procedure (pdr_in, st, pst); + + do_cleanups (old_chain); + } + } + else + { + /* This symbol table contains ordinary ecoff entries. */ + + int f_max; + int maxlines; + EXTR *ext_ptr; + + /* How many symbols will we need */ + /* FIXME, this does not count enum values. */ + f_max = pst->n_global_syms + pst->n_static_syms; + if (fh == 0) + { + maxlines = 0; + st = new_symtab ("unknown", f_max, 0, pst->objfile); + } + else + { + f_max += fh->csym + fh->cpd; + maxlines = 2 * fh->cline; + st = new_symtab (pst->filename, 2 * f_max, maxlines, pst->objfile); + + /* The proper language was already determined when building + the psymtab, use it. */ + st->language = PST_PRIVATE (pst)->pst_language; + } + + psymtab_language = st->language; + + lines = LINETABLE (st); + + /* Get a new lexical context */ + + push_parse_stack (); + top_stack->cur_st = st; + top_stack->cur_block = BLOCKVECTOR_BLOCK (BLOCKVECTOR (st), + STATIC_BLOCK); + BLOCK_START (top_stack->cur_block) = pst->textlow; + BLOCK_END (top_stack->cur_block) = 0; + top_stack->blocktype = stFile; + top_stack->maxsyms = 2 * f_max; + top_stack->cur_type = 0; + top_stack->procadr = 0; + top_stack->numargs = 0; + found_ecoff_debugging_info = 0; + + if (fh) + { + char *sym_ptr; + char *sym_end; + + /* Parse local symbols first */ + sym_ptr = ((char *) debug_info->external_sym + + fh->isymBase * external_sym_size); + sym_end = sym_ptr + fh->csym * external_sym_size; + while (sym_ptr < sym_end) + { + SYMR sh; + int c; + + (*swap_sym_in) (cur_bfd, sym_ptr, &sh); + c = parse_symbol (&sh, + debug_info->external_aux + fh->iauxBase, + sym_ptr, fh->fBigendian, pst->section_offsets); + sym_ptr += c * external_sym_size; + } + + /* Linenumbers. At the end, check if we can save memory. + parse_lines has to look ahead an arbitrary number of PDR + structures, so we swap them all first. */ + if (fh->cpd > 0) + { + PDR *pr_block; + struct cleanup *old_chain; + char *pdr_ptr; + char *pdr_end; + PDR *pdr_in; + PDR *pdr_in_end; + + pr_block = (PDR *) xmalloc (fh->cpd * sizeof (PDR)); + + old_chain = make_cleanup (free, pr_block); + + pdr_ptr = ((char *) debug_info->external_pdr + + fh->ipdFirst * external_pdr_size); + pdr_end = pdr_ptr + fh->cpd * external_pdr_size; + pdr_in = pr_block; + for (; + pdr_ptr < pdr_end; + pdr_ptr += external_pdr_size, pdr_in++) + { + (*swap_pdr_in) (cur_bfd, pdr_ptr, pdr_in); + + /* Determine lowest PDR address, the PDRs are not always + sorted. */ + if (pdr_in == pr_block) + lowest_pdr_addr = pdr_in->adr; + else if (pdr_in->adr < lowest_pdr_addr) + lowest_pdr_addr = pdr_in->adr; + } + + parse_lines (fh, pr_block, lines, maxlines, pst, lowest_pdr_addr); + if (lines->nitems < fh->cline) + lines = shrink_linetable (lines); + + /* Fill in procedure info next. */ + pdr_in = pr_block; + pdr_in_end = pdr_in + fh->cpd; + for (; pdr_in < pdr_in_end; pdr_in++) + parse_procedure (pdr_in, 0, pst); + + do_cleanups (old_chain); + } + } + + LINETABLE (st) = lines; + + /* .. and our share of externals. + XXX use the global list to speed up things here. how? + FIXME, Maybe quit once we have found the right number of ext's? */ + top_stack->cur_st = st; + top_stack->cur_block = BLOCKVECTOR_BLOCK (BLOCKVECTOR (top_stack->cur_st), + GLOBAL_BLOCK); + top_stack->blocktype = stFile; + top_stack->maxsyms + = (debug_info->symbolic_header.isymMax + + debug_info->symbolic_header.ipdMax + + debug_info->symbolic_header.iextMax); + + ext_ptr = PST_PRIVATE (pst)->extern_tab; + for (i = PST_PRIVATE (pst)->extern_count; --i >= 0; ext_ptr++) + parse_external (ext_ptr, fh->fBigendian, pst->section_offsets); + + /* If there are undefined symbols, tell the user. + The alpha has an undefined symbol for every symbol that is + from a shared library, so tell the user only if verbose is on. */ + if (info_verbose && n_undef_symbols) + { + printf_filtered ("File %s contains %d unresolved references:", + st->filename, n_undef_symbols); + printf_filtered ("\n\t%4d variables\n\t%4d procedures\n\t%4d labels\n", + n_undef_vars, n_undef_procs, n_undef_labels); + n_undef_symbols = n_undef_labels = n_undef_vars = n_undef_procs = 0; + + } + pop_parse_stack (); + + st->primary = 1; + + /* Sort the symbol table now, we are done adding symbols to it.*/ + sort_symtab_syms (st); + + sort_blocks (st); + } + + /* Now link the psymtab and the symtab. */ + pst->symtab = st; + + current_objfile = NULL; +} + +/* Ancillary parsing procedures. */ + +/* Return 1 if the symbol pointed to by SH has a cross reference + to an opaque aggregate type, else 0. */ + +static int +has_opaque_xref (fh, sh) + FDR *fh; + SYMR *sh; +{ + TIR tir; + union aux_ext *ax; + RNDXR rn[1]; + unsigned int rf; + + if (sh->index == indexNil) + return 0; + + ax = debug_info->external_aux + fh->iauxBase + sh->index; + (*debug_swap->swap_tir_in) (fh->fBigendian, &ax->a_ti, &tir); + if (tir.bt != btStruct && tir.bt != btUnion && tir.bt != btEnum) + return 0; + + ax++; + (*debug_swap->swap_rndx_in) (fh->fBigendian, &ax->a_rndx, rn); + if (rn->rfd == 0xfff) + rf = AUX_GET_ISYM (fh->fBigendian, ax + 1); + else + rf = rn->rfd; + if (rf != -1) + return 0; + return 1; +} + +/* Lookup the type at relative index RN. Return it in TPP + if found and in any event come up with its name PNAME. + BIGEND says whether aux symbols are big-endian or not (from fh->fBigendian). + Return value says how many aux symbols we ate. */ + +static int +cross_ref (fd, ax, tpp, type_code, pname, bigend, sym_name) + int fd; + union aux_ext *ax; + struct type **tpp; + enum type_code type_code; /* Use to alloc new type if none is found. */ + char **pname; + int bigend; + char *sym_name; +{ + RNDXR rn[1]; + unsigned int rf; + int result = 1; + FDR *fh; + char *esh; + SYMR sh; + int xref_fd; + struct mdebug_pending *pend; + + *tpp = (struct type *)NULL; + + (*debug_swap->swap_rndx_in) (bigend, &ax->a_rndx, rn); + + /* Escape index means 'the next one' */ + if (rn->rfd == 0xfff) + { + result++; + rf = AUX_GET_ISYM (bigend, ax + 1); + } + else + { + rf = rn->rfd; + } + + /* mips cc uses a rf of -1 for opaque struct definitions. + Set TYPE_FLAG_STUB for these types so that check_typedef will + resolve them if the struct gets defined in another compilation unit. */ + if (rf == -1) + { + *pname = "<undefined>"; + *tpp = init_type (type_code, 0, 0, (char *) NULL, current_objfile); + TYPE_FLAGS (*tpp) |= TYPE_FLAG_STUB; + return result; + } + + /* mips cc uses an escaped rn->index of 0 for struct return types + of procedures that were compiled without -g. These will always remain + undefined. */ + if (rn->rfd == 0xfff && rn->index == 0) + { + *pname = "<undefined>"; + return result; + } + + /* Find the relative file descriptor and the symbol in it. */ + fh = get_rfd (fd, rf); + xref_fd = fh - debug_info->fdr; + + if (rn->index >= fh->csym) + { + /* File indirect entry is corrupt. */ + *pname = "<illegal>"; + complain (&bad_rfd_entry_complaint, + sym_name, xref_fd, rn->index); + return result; + } + + /* If we have processed this symbol then we left a forwarding + pointer to the type in the pending list. If not, we`ll put + it in a list of pending types, to be processed later when + the file will be. In any event, we collect the name for the + type here. */ + + esh = ((char *) debug_info->external_sym + + ((fh->isymBase + rn->index) + * debug_swap->external_sym_size)); + (*debug_swap->swap_sym_in) (cur_bfd, esh, &sh); + + /* Make sure that this type of cross reference can be handled. */ + if ((sh.sc != scInfo + || (sh.st != stBlock && sh.st != stTypedef && sh.st != stIndirect + && sh.st != stStruct && sh.st != stUnion + && sh.st != stEnum)) + && (sh.st != stBlock || !SC_IS_COMMON(sh.sc))) + { + /* File indirect entry is corrupt. */ + *pname = "<illegal>"; + complain (&bad_rfd_entry_complaint, + sym_name, xref_fd, rn->index); + return result; + } + + *pname = debug_info->ss + fh->issBase + sh.iss; + + pend = is_pending_symbol (fh, esh); + if (pend) + *tpp = pend->t; + else + { + /* We have not yet seen this type. */ + + if ((sh.iss == 0 && sh.st == stTypedef) || sh.st == stIndirect) + { + TIR tir; + + /* alpha cc puts out a stTypedef with a sh.iss of zero for + two cases: + a) forward declarations of structs/unions/enums which are not + defined in this compilation unit. + For these the type will be void. This is a bad design decision + as cross referencing across compilation units is impossible + due to the missing name. + b) forward declarations of structs/unions/enums/typedefs which + are defined later in this file or in another file in the same + compilation unit. Irix5 cc uses a stIndirect symbol for this. + Simply cross reference those again to get the true type. + The forward references are not entered in the pending list and + in the symbol table. */ + + (*debug_swap->swap_tir_in) (bigend, + &(debug_info->external_aux + + fh->iauxBase + sh.index)->a_ti, + &tir); + if (tir.tq0 != tqNil) + complain (&illegal_forward_tq0_complaint, sym_name); + switch (tir.bt) + { + case btVoid: + *tpp = init_type (type_code, 0, 0, (char *) NULL, + current_objfile); + *pname = "<undefined>"; + break; + + case btStruct: + case btUnion: + case btEnum: + cross_ref (xref_fd, + (debug_info->external_aux + + fh->iauxBase + sh.index + 1), + tpp, type_code, pname, + fh->fBigendian, sym_name); + break; + + case btTypedef: + /* Follow a forward typedef. This might recursively + call cross_ref till we get a non typedef'ed type. + FIXME: This is not correct behaviour, but gdb currently + cannot handle typedefs without type copying. Type + copying is impossible as we might have mutual forward + references between two files and the copied type would not + get filled in when we later parse its definition. */ + *tpp = parse_type (xref_fd, + debug_info->external_aux + fh->iauxBase, + sh.index, + (int *)NULL, + fh->fBigendian, + debug_info->ss + fh->issBase + sh.iss); + add_pending (fh, esh, *tpp); + break; + + default: + complain (&illegal_forward_bt_complaint, tir.bt, sym_name); + *tpp = init_type (type_code, 0, 0, (char *) NULL, + current_objfile); + break; + } + return result; + } + else if (sh.st == stTypedef) + { + /* Parse the type for a normal typedef. This might recursively call + cross_ref till we get a non typedef'ed type. + FIXME: This is not correct behaviour, but gdb currently + cannot handle typedefs without type copying. But type copying is + impossible as we might have mutual forward references between + two files and the copied type would not get filled in when + we later parse its definition. */ + *tpp = parse_type (xref_fd, + debug_info->external_aux + fh->iauxBase, + sh.index, + (int *)NULL, + fh->fBigendian, + debug_info->ss + fh->issBase + sh.iss); + } + else + { + /* Cross reference to a struct/union/enum which is defined + in another file in the same compilation unit but that file + has not been parsed yet. + Initialize the type only, it will be filled in when + it's definition is parsed. */ + *tpp = init_type (type_code, 0, 0, (char *) NULL, current_objfile); + } + add_pending (fh, esh, *tpp); + } + + /* We used one auxent normally, two if we got a "next one" rf. */ + return result; +} + + +/* Quick&dirty lookup procedure, to avoid the MI ones that require + keeping the symtab sorted */ + +static struct symbol * +mylookup_symbol (name, block, namespace, class) + char *name; + register struct block *block; + namespace_enum namespace; + enum address_class class; +{ + register int bot, top, inc; + register struct symbol *sym; + + bot = 0; + top = BLOCK_NSYMS (block); + inc = name[0]; + while (bot < top) + { + sym = BLOCK_SYM (block, bot); + if (SYMBOL_NAME (sym)[0] == inc + && SYMBOL_NAMESPACE (sym) == namespace + && SYMBOL_CLASS (sym) == class + && strcmp (SYMBOL_NAME (sym), name) == 0) + return sym; + bot++; + } + block = BLOCK_SUPERBLOCK (block); + if (block) + return mylookup_symbol (name, block, namespace, class); + return 0; +} + + +/* Add a new symbol S to a block B. + Infrequently, we will need to reallocate the block to make it bigger. + We only detect this case when adding to top_stack->cur_block, since + that's the only time we know how big the block is. FIXME. */ + +static void +add_symbol (s, b) + struct symbol *s; + struct block *b; +{ + int nsyms = BLOCK_NSYMS (b)++; + struct block *origb; + struct parse_stack *stackp; + + if (b == top_stack->cur_block && + nsyms >= top_stack->maxsyms) + { + complain (&block_overflow_complaint, SYMBOL_NAME (s)); + /* In this case shrink_block is actually grow_block, since + BLOCK_NSYMS(b) is larger than its current size. */ + origb = b; + b = shrink_block (top_stack->cur_block, top_stack->cur_st); + + /* Now run through the stack replacing pointers to the + original block. shrink_block has already done this + for the blockvector and BLOCK_FUNCTION. */ + for (stackp = top_stack; stackp; stackp = stackp->next) + { + if (stackp->cur_block == origb) + { + stackp->cur_block = b; + stackp->maxsyms = BLOCK_NSYMS (b); + } + } + } + BLOCK_SYM (b, nsyms) = s; +} + +/* Add a new block B to a symtab S */ + +static void +add_block (b, s) + struct block *b; + struct symtab *s; +{ + struct blockvector *bv = BLOCKVECTOR (s); + + bv = (struct blockvector *) xrealloc ((PTR) bv, + (sizeof (struct blockvector) + + BLOCKVECTOR_NBLOCKS (bv) + * sizeof (bv->block))); + if (bv != BLOCKVECTOR (s)) + BLOCKVECTOR (s) = bv; + + BLOCKVECTOR_BLOCK (bv, BLOCKVECTOR_NBLOCKS (bv)++) = b; +} + +/* Add a new linenumber entry (LINENO,ADR) to a linevector LT. + MIPS' linenumber encoding might need more than one byte + to describe it, LAST is used to detect these continuation lines. + + Combining lines with the same line number seems like a bad idea. + E.g: There could be a line number entry with the same line number after the + prologue and GDB should not ignore it (this is a better way to find + a prologue than mips_skip_prologue). + But due to the compressed line table format there are line number entries + for the same line which are needed to bridge the gap to the next + line number entry. These entries have a bogus address info with them + and we are unable to tell them from intended duplicate line number + entries. + This is another reason why -ggdb debugging format is preferable. */ + +static int +add_line (lt, lineno, adr, last) + struct linetable *lt; + int lineno; + CORE_ADDR adr; + int last; +{ + /* DEC c89 sometimes produces zero linenos which confuse gdb. + Change them to something sensible. */ + if (lineno == 0) + lineno = 1; + if (last == 0) + last = -2; /* make sure we record first line */ + + if (last == lineno) /* skip continuation lines */ + return lineno; + + lt->item[lt->nitems].line = lineno; + lt->item[lt->nitems++].pc = adr << 2; + return lineno; +} + +/* Sorting and reordering procedures */ + +/* Blocks with a smaller low bound should come first */ + +static int +compare_blocks (arg1, arg2) + const PTR arg1; + const PTR arg2; +{ + register int addr_diff; + struct block **b1 = (struct block **) arg1; + struct block **b2 = (struct block **) arg2; + + addr_diff = (BLOCK_START ((*b1))) - (BLOCK_START ((*b2))); + if (addr_diff == 0) + return (BLOCK_END ((*b2))) - (BLOCK_END ((*b1))); + return addr_diff; +} + +/* Sort the blocks of a symtab S. + Reorder the blocks in the blockvector by code-address, + as required by some MI search routines */ + +static void +sort_blocks (s) + struct symtab *s; +{ + struct blockvector *bv = BLOCKVECTOR (s); + + if (BLOCKVECTOR_NBLOCKS (bv) <= 2) + { + /* Cosmetic */ + if (BLOCK_END (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)) == 0) + BLOCK_START (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)) = 0; + if (BLOCK_END (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)) == 0) + BLOCK_START (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)) = 0; + return; + } + /* + * This is very unfortunate: normally all functions are compiled in + * the order they are found, but if the file is compiled -O3 things + * are very different. It would be nice to find a reliable test + * to detect -O3 images in advance. + */ + if (BLOCKVECTOR_NBLOCKS (bv) > 3) + qsort (&BLOCKVECTOR_BLOCK (bv, FIRST_LOCAL_BLOCK), + BLOCKVECTOR_NBLOCKS (bv) - FIRST_LOCAL_BLOCK, + sizeof (struct block *), + compare_blocks); + + { + register CORE_ADDR high = 0; + register int i, j = BLOCKVECTOR_NBLOCKS (bv); + + for (i = FIRST_LOCAL_BLOCK; i < j; i++) + if (high < BLOCK_END (BLOCKVECTOR_BLOCK (bv, i))) + high = BLOCK_END (BLOCKVECTOR_BLOCK (bv, i)); + BLOCK_END (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)) = high; + } + + BLOCK_START (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)) = + BLOCK_START (BLOCKVECTOR_BLOCK (bv, FIRST_LOCAL_BLOCK)); + + BLOCK_START (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)) = + BLOCK_START (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)); + BLOCK_END (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)) = + BLOCK_END (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)); +} + + +/* Constructor/restructor/destructor procedures */ + +/* Allocate a new symtab for NAME. Needs an estimate of how many symbols + MAXSYMS and linenumbers MAXLINES we'll put in it */ + +static struct symtab * +new_symtab (name, maxsyms, maxlines, objfile) + char *name; + int maxsyms; + int maxlines; + struct objfile *objfile; +{ + struct symtab *s = allocate_symtab (name, objfile); + + LINETABLE (s) = new_linetable (maxlines); + + /* All symtabs must have at least two blocks */ + BLOCKVECTOR (s) = new_bvect (2); + BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK) = new_block (maxsyms); + BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK) = new_block (maxsyms); + BLOCK_SUPERBLOCK (BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK)) = + BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK); + + s->free_code = free_linetable; + s->debugformat = obsavestring ("ECOFF", 5, + &objfile -> symbol_obstack); + return (s); +} + +/* Allocate a new partial_symtab NAME */ + +static struct partial_symtab * +new_psymtab (name, objfile, section_offsets) + char *name; + struct objfile *objfile; + struct section_offsets *section_offsets; +{ + struct partial_symtab *psymtab; + + psymtab = allocate_psymtab (name, objfile); + psymtab->section_offsets = section_offsets; + + /* Keep a backpointer to the file's symbols */ + + psymtab->read_symtab_private = ((char *) + obstack_alloc (&objfile->psymbol_obstack, + sizeof (struct symloc))); + memset ((PTR) psymtab->read_symtab_private, 0, sizeof (struct symloc)); + CUR_BFD (psymtab) = cur_bfd; + DEBUG_SWAP (psymtab) = debug_swap; + DEBUG_INFO (psymtab) = debug_info; + PENDING_LIST (psymtab) = pending_list; + + /* The way to turn this into a symtab is to call... */ + psymtab->read_symtab = mdebug_psymtab_to_symtab; + return (psymtab); +} + + +/* Allocate a linetable array of the given SIZE. Since the struct + already includes one item, we subtract one when calculating the + proper size to allocate. */ + +static struct linetable * +new_linetable (size) + int size; +{ + struct linetable *l; + + size = (size - 1) * sizeof (l->item) + sizeof (struct linetable); + l = (struct linetable *) xmalloc (size); + l->nitems = 0; + return l; +} + +/* Oops, too big. Shrink it. This was important with the 2.4 linetables, + I am not so sure about the 3.4 ones. + + Since the struct linetable already includes one item, we subtract one when + calculating the proper size to allocate. */ + +static struct linetable * +shrink_linetable (lt) + struct linetable *lt; +{ + + return (struct linetable *) xrealloc ((PTR) lt, + (sizeof (struct linetable) + + ((lt->nitems - 1) + * sizeof (lt->item)))); +} + +/* Allocate and zero a new blockvector of NBLOCKS blocks. */ + +static struct blockvector * +new_bvect (nblocks) + int nblocks; +{ + struct blockvector *bv; + int size; + + size = sizeof (struct blockvector) + nblocks * sizeof (struct block *); + bv = (struct blockvector *) xzalloc (size); + + BLOCKVECTOR_NBLOCKS (bv) = nblocks; + + return bv; +} + +/* Allocate and zero a new block of MAXSYMS symbols */ + +static struct block * +new_block (maxsyms) + int maxsyms; +{ + int size = sizeof (struct block) + (maxsyms - 1) * sizeof (struct symbol *); + + return (struct block *) xzalloc (size); +} + +/* Ooops, too big. Shrink block B in symtab S to its minimal size. + Shrink_block can also be used by add_symbol to grow a block. */ + +static struct block * +shrink_block (b, s) + struct block *b; + struct symtab *s; +{ + struct block *new; + struct blockvector *bv = BLOCKVECTOR (s); + int i; + + /* Just reallocate it and fix references to the old one */ + + new = (struct block *) xrealloc ((PTR) b, + (sizeof (struct block) + + ((BLOCK_NSYMS (b) - 1) + * sizeof (struct symbol *)))); + + /* Should chase pointers to old one. Fortunately, that`s just + the block`s function and inferior blocks */ + if (BLOCK_FUNCTION (new) && SYMBOL_BLOCK_VALUE (BLOCK_FUNCTION (new)) == b) + SYMBOL_BLOCK_VALUE (BLOCK_FUNCTION (new)) = new; + for (i = 0; i < BLOCKVECTOR_NBLOCKS (bv); i++) + if (BLOCKVECTOR_BLOCK (bv, i) == b) + BLOCKVECTOR_BLOCK (bv, i) = new; + else if (BLOCK_SUPERBLOCK (BLOCKVECTOR_BLOCK (bv, i)) == b) + BLOCK_SUPERBLOCK (BLOCKVECTOR_BLOCK (bv, i)) = new; + return new; +} + +/* Create a new symbol with printname NAME */ + +static struct symbol * +new_symbol (name) + char *name; +{ + struct symbol *s = ((struct symbol *) + obstack_alloc (¤t_objfile->symbol_obstack, + sizeof (struct symbol))); + + memset ((PTR) s, 0, sizeof (*s)); + SYMBOL_NAME (s) = obsavestring (name, strlen (name), + ¤t_objfile->symbol_obstack); + SYMBOL_LANGUAGE (s) = psymtab_language; + SYMBOL_INIT_DEMANGLED_NAME (s, ¤t_objfile->symbol_obstack); + return s; +} + +/* Create a new type with printname NAME */ + +static struct type * +new_type (name) + char *name; +{ + struct type *t; + + t = alloc_type (current_objfile); + TYPE_NAME (t) = name; + TYPE_CPLUS_SPECIFIC (t) = (struct cplus_struct_type *) &cplus_struct_default; + return t; +} + +/* Read ECOFF debugging information from a BFD section. This is + called from elfread.c. It parses the section into a + ecoff_debug_info struct, and then lets the rest of the file handle + it as normal. */ + +void +elfmdebug_build_psymtabs (objfile, swap, sec, section_offsets) + struct objfile *objfile; + const struct ecoff_debug_swap *swap; + asection *sec; + struct section_offsets *section_offsets; +{ + bfd *abfd = objfile->obfd; + struct ecoff_debug_info *info; + + info = ((struct ecoff_debug_info *) + obstack_alloc (&objfile->psymbol_obstack, + sizeof (struct ecoff_debug_info))); + + if (!(*swap->read_debug_info) (abfd, sec, info)) + error ("Error reading ECOFF debugging information: %s", + bfd_errmsg (bfd_get_error ())); + + mdebug_build_psymtabs (objfile, swap, info, section_offsets); +} + + +/* Things used for calling functions in the inferior. + These functions are exported to our companion + mips-tdep.c file and are here because they play + with the symbol-table explicitly. */ + +/* Sigtramp: make sure we have all the necessary information + about the signal trampoline code. Since the official code + from MIPS does not do so, we make up that information ourselves. + If they fix the library (unlikely) this code will neutralize itself. */ + +/* FIXME: This function is called only by mips-tdep.c. It needs to be + here because it calls functions defined in this file, but perhaps + this could be handled in a better way. Only compile it in when + tm-mips.h is included. */ + +#ifdef TM_MIPS_H + +void +fixup_sigtramp () +{ + struct symbol *s; + struct symtab *st; + struct block *b, *b0 = NULL; + + sigtramp_address = -1; + + /* We have to handle the following cases here: + a) The Mips library has a sigtramp label within sigvec. + b) Irix has a _sigtramp which we want to use, but it also has sigvec. */ + s = lookup_symbol ("sigvec", 0, VAR_NAMESPACE, 0, NULL); + if (s != 0) + { + b0 = SYMBOL_BLOCK_VALUE (s); + s = lookup_symbol ("sigtramp", b0, VAR_NAMESPACE, 0, NULL); + } + if (s == 0) + { + /* No sigvec or no sigtramp inside sigvec, try _sigtramp. */ + s = lookup_symbol ("_sigtramp", 0, VAR_NAMESPACE, 0, NULL); + } + + /* But maybe this program uses its own version of sigvec */ + if (s == 0) + return; + + /* Did we or MIPSco fix the library ? */ + if (SYMBOL_CLASS (s) == LOC_BLOCK) + { + sigtramp_address = BLOCK_START (SYMBOL_BLOCK_VALUE (s)); + sigtramp_end = BLOCK_END (SYMBOL_BLOCK_VALUE (s)); + return; + } + + sigtramp_address = SYMBOL_VALUE (s); + sigtramp_end = sigtramp_address + 0x88; /* black magic */ + + /* But what symtab does it live in ? */ + st = find_pc_symtab (SYMBOL_VALUE (s)); + + /* + * Ok, there goes the fix: turn it into a procedure, with all the + * needed info. Note we make it a nested procedure of sigvec, + * which is the way the (assembly) code is actually written. + */ + SYMBOL_NAMESPACE (s) = VAR_NAMESPACE; + SYMBOL_CLASS (s) = LOC_BLOCK; + SYMBOL_TYPE (s) = init_type (TYPE_CODE_FUNC, 4, 0, (char *) NULL, + st->objfile); + TYPE_TARGET_TYPE (SYMBOL_TYPE (s)) = mdebug_type_void; + + /* Need a block to allocate MIPS_EFI_SYMBOL_NAME in */ + b = new_block (1); + SYMBOL_BLOCK_VALUE (s) = b; + BLOCK_START (b) = sigtramp_address; + BLOCK_END (b) = sigtramp_end; + BLOCK_FUNCTION (b) = s; + BLOCK_SUPERBLOCK (b) = BLOCK_SUPERBLOCK (b0); + add_block (b, st); + sort_blocks (st); + + /* Make a MIPS_EFI_SYMBOL_NAME entry for it */ + { + struct mips_extra_func_info *e = + ((struct mips_extra_func_info *) + xzalloc (sizeof (struct mips_extra_func_info))); + + e->numargs = 0; /* the kernel thinks otherwise */ + e->pdr.frameoffset = 32; + e->pdr.framereg = SP_REGNUM; + /* Note that setting pcreg is no longer strictly necessary as + mips_frame_saved_pc is now aware of signal handler frames. */ + e->pdr.pcreg = PC_REGNUM; + e->pdr.regmask = -2; + /* Offset to saved r31, in the sigtramp case the saved registers + are above the frame in the sigcontext. + We have 4 alignment bytes, 12 bytes for onstack, mask and pc, + 32 * 4 bytes for the general registers, 12 bytes for mdhi, mdlo, ownedfp + and 32 * 4 bytes for the floating point registers. */ + e->pdr.regoffset = 4 + 12 + 31 * 4; + e->pdr.fregmask = -1; + /* Offset to saved f30 (first saved *double* register). */ + e->pdr.fregoffset = 4 + 12 + 32 * 4 + 12 + 30 * 4; + e->pdr.isym = (long) s; + e->pdr.adr = sigtramp_address; + + current_objfile = st->objfile; /* Keep new_symbol happy */ + s = new_symbol (MIPS_EFI_SYMBOL_NAME); + SYMBOL_VALUE (s) = (long) e; + SYMBOL_NAMESPACE (s) = LABEL_NAMESPACE; + SYMBOL_CLASS (s) = LOC_CONST; + SYMBOL_TYPE (s) = mdebug_type_void; + current_objfile = NULL; + } + + BLOCK_SYM (b, BLOCK_NSYMS (b)++) = s; +} + +#endif /* TM_MIPS_H */ + +void +_initialize_mdebugread () +{ + mdebug_type_void = + init_type (TYPE_CODE_VOID, 1, + 0, + "void", (struct objfile *) NULL); + mdebug_type_char = + init_type (TYPE_CODE_INT, 1, + 0, + "char", (struct objfile *) NULL); + mdebug_type_unsigned_char = + init_type (TYPE_CODE_INT, 1, + TYPE_FLAG_UNSIGNED, + "unsigned char", (struct objfile *) NULL); + mdebug_type_short = + init_type (TYPE_CODE_INT, 2, + 0, + "short", (struct objfile *) NULL); + mdebug_type_unsigned_short = + init_type (TYPE_CODE_INT, 2, + TYPE_FLAG_UNSIGNED, + "unsigned short", (struct objfile *) NULL); + mdebug_type_int_32 = + init_type (TYPE_CODE_INT, 4, + 0, + "int", (struct objfile *) NULL); + mdebug_type_unsigned_int_32 = + init_type (TYPE_CODE_INT, 4, + TYPE_FLAG_UNSIGNED, + "unsigned int", (struct objfile *) NULL); + mdebug_type_int_64 = + init_type (TYPE_CODE_INT, 8, + 0, + "int", (struct objfile *) NULL); + mdebug_type_unsigned_int_64 = + init_type (TYPE_CODE_INT, 8, + TYPE_FLAG_UNSIGNED, + "unsigned int", (struct objfile *) NULL); + mdebug_type_long_32 = + init_type (TYPE_CODE_INT, 4, + 0, + "long", (struct objfile *) NULL); + mdebug_type_unsigned_long_32 = + init_type (TYPE_CODE_INT, 4, + TYPE_FLAG_UNSIGNED, + "unsigned long", (struct objfile *) NULL); + mdebug_type_long_64 = + init_type (TYPE_CODE_INT, 8, + 0, + "long", (struct objfile *) NULL); + mdebug_type_unsigned_long_64 = + init_type (TYPE_CODE_INT, 8, + TYPE_FLAG_UNSIGNED, + "unsigned long", (struct objfile *) NULL); + mdebug_type_long_long_64 = + init_type (TYPE_CODE_INT, 8, + 0, + "long long", (struct objfile *) NULL); + mdebug_type_unsigned_long_long_64 = + init_type (TYPE_CODE_INT, 8, + TYPE_FLAG_UNSIGNED, + "unsigned long long", (struct objfile *) NULL); + mdebug_type_adr_32 = + init_type (TYPE_CODE_PTR, 4, + TYPE_FLAG_UNSIGNED, + "adr_32", (struct objfile *) NULL); + TYPE_TARGET_TYPE (mdebug_type_adr_32) = mdebug_type_void; + mdebug_type_adr_64 = + init_type (TYPE_CODE_PTR, 8, + TYPE_FLAG_UNSIGNED, + "adr_64", (struct objfile *) NULL); + TYPE_TARGET_TYPE (mdebug_type_adr_64) = mdebug_type_void; + mdebug_type_float = + init_type (TYPE_CODE_FLT, TARGET_FLOAT_BIT / TARGET_CHAR_BIT, + 0, + "float", (struct objfile *) NULL); + mdebug_type_double = + init_type (TYPE_CODE_FLT, TARGET_DOUBLE_BIT / TARGET_CHAR_BIT, + 0, + "double", (struct objfile *) NULL); + mdebug_type_complex = + init_type (TYPE_CODE_COMPLEX, 2 * TARGET_FLOAT_BIT / TARGET_CHAR_BIT, + 0, + "complex", (struct objfile *) NULL); + TYPE_TARGET_TYPE (mdebug_type_complex) = mdebug_type_float; + mdebug_type_double_complex = + init_type (TYPE_CODE_COMPLEX, 2 * TARGET_DOUBLE_BIT / TARGET_CHAR_BIT, + 0, + "double complex", (struct objfile *) NULL); + TYPE_TARGET_TYPE (mdebug_type_double_complex) = mdebug_type_double; + + /* Is a "string" the way btString means it the same as TYPE_CODE_STRING? + FIXME. */ + mdebug_type_string = + init_type (TYPE_CODE_STRING, + TARGET_CHAR_BIT / TARGET_CHAR_BIT, + 0, "string", + (struct objfile *) NULL); + + /* We use TYPE_CODE_INT to print these as integers. Does this do any + good? Would we be better off with TYPE_CODE_ERROR? Should + TYPE_CODE_ERROR print things in hex if it knows the size? */ + mdebug_type_fixed_dec = + init_type (TYPE_CODE_INT, + TARGET_INT_BIT / TARGET_CHAR_BIT, + 0, "fixed decimal", + (struct objfile *) NULL); + + mdebug_type_float_dec = + init_type (TYPE_CODE_ERROR, + TARGET_DOUBLE_BIT / TARGET_CHAR_BIT, + 0, "floating decimal", + (struct objfile *) NULL); + + nodebug_func_symbol_type = init_type (TYPE_CODE_FUNC, 1, 0, + "<function, no debug info>", NULL); + TYPE_TARGET_TYPE (nodebug_func_symbol_type) = mdebug_type_int; + nodebug_var_symbol_type = + init_type (TYPE_CODE_INT, TARGET_INT_BIT / HOST_CHAR_BIT, 0, + "<variable, no debug info>", NULL); +} |