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Diffstat (limited to 'gas/config/tc-ppc.h')
| -rw-r--r-- | gas/config/tc-ppc.h | 276 |
1 files changed, 276 insertions, 0 deletions
diff --git a/gas/config/tc-ppc.h b/gas/config/tc-ppc.h new file mode 100644 index 00000000000..0871d130d6d --- /dev/null +++ b/gas/config/tc-ppc.h @@ -0,0 +1,276 @@ +/* tc-ppc.h -- Header file for tc-ppc.c. + Copyright (C) 1994, 1995, 1996, 1997, 1998 Free Software Foundation, Inc. + Written by Ian Lance Taylor, Cygnus Support. + + This file is part of GAS, the GNU Assembler. + + GAS 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, or (at your option) + any later version. + + GAS 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 GAS; see the file COPYING. If not, write to the Free + Software Foundation, 59 Temple Place - Suite 330, Boston, MA + 02111-1307, USA. */ + +#define TC_PPC + +#ifdef ANSI_PROTOTYPES +struct fix; +#endif + +/* Set the endianness we are using. Default to big endian. */ +#ifndef TARGET_BYTES_BIG_ENDIAN +#define TARGET_BYTES_BIG_ENDIAN 1 +#endif + +#ifndef BFD_ASSEMBLER + #error PowerPC support requires BFD_ASSEMBLER +#endif + +/* If OBJ_COFF is defined, and TE_PE is not defined, we are assembling + XCOFF for AIX or PowerMac. If TE_PE is defined, we are assembling + COFF for Windows NT. */ + +#ifdef OBJ_COFF +#ifndef TE_PE +#define OBJ_XCOFF +#endif +#endif + +/* The target BFD architecture. */ +#define TARGET_ARCH (ppc_arch ()) +extern enum bfd_architecture ppc_arch PARAMS ((void)); + +/* Whether or not the target is big endian */ +extern int target_big_endian; + +/* The target BFD format. */ +#ifdef OBJ_COFF +#ifdef TE_PE +#define TARGET_FORMAT (target_big_endian ? "pe-powerpc" : "pe-powerpcle") +#else +#define TARGET_FORMAT "aixcoff-rs6000" +#endif +#endif + +/* PowerMac has a BFD slightly different from AIX's. */ +#ifdef TE_POWERMAC +#ifdef TARGET_FORMAT +#undef TARGET_FORMAT +#endif +#define TARGET_FORMAT "xcoff-powermac" +#endif + +#ifdef OBJ_ELF +#define TARGET_FORMAT (target_big_endian ? "elf32-powerpc" : "elf32-powerpcle") +#endif + +/* Permit temporary numeric labels. */ +#define LOCAL_LABELS_FB 1 + +/* $ is used to refer to the current location. */ +#define DOLLAR_DOT + +/* Strings do not use backslash escapes under COFF. */ +#ifdef OBJ_COFF +#define NO_STRING_ESCAPES +#endif + +#ifdef OBJ_ELF +#define DIFF_EXPR_OK /* foo-. gets turned into PC relative relocs */ +#endif + +#if TARGET_BYTES_BIG_ENDIAN +#define PPC_BIG_ENDIAN 1 +#else +#define PPC_BIG_ENDIAN 0 +#endif + +/* We don't need to handle .word strangely. */ +#define WORKING_DOT_WORD + +/* We set the fx_done field appropriately in md_apply_fix. */ +#define TC_HANDLES_FX_DONE + +#ifdef TE_PE + +/* Question marks are permitted in symbol names. */ +#define LEX_QM 1 + +/* Don't adjust TOC relocs. */ +#define tc_fix_adjustable(fixp) ppc_pe_fix_adjustable (fixp) +extern int ppc_pe_fix_adjustable PARAMS ((struct fix *)); + +#endif + +#ifdef OBJ_XCOFF + +/* Declarations needed when generating XCOFF code. XCOFF is an + extension of COFF, used only on the RS/6000. Rather than create an + obj-xcoff, we just use obj-coff, and handle the extensions here in + tc-ppc. */ + +/* We need to keep some information for symbols. */ +struct ppc_tc_sy +{ + /* We keep a few linked lists of symbols. */ + struct symbol *next; + /* Non-zero if the symbol should be output. The RS/6000 assembler + only outputs symbols that are external or are mentioned in a + .globl or .lglobl statement. */ + int output; + /* The symbol class. */ + int class; + /* The real name, if the symbol was renamed. */ + char *real_name; + /* For a csect symbol, the subsegment we are using. This is zero + for symbols that are not csects. */ + subsegT subseg; + /* For a csect or common symbol, the alignment to use. */ + int align; + /* For a function symbol, a symbol whose value is the size. The + field is NULL if there is no size. */ + struct symbol *size; + /* For a csect symbol, the last symbol which has been defined in + this csect, or NULL if none have been defined so far. For a .bs + symbol, the referenced csect symbol. */ + struct symbol *within; +}; + +#define TC_SYMFIELD_TYPE struct ppc_tc_sy + +/* We need an additional auxent for function symbols. */ +#define OBJ_COFF_MAX_AUXENTRIES 2 + +/* Square and curly brackets are permitted in symbol names. */ +#define LEX_BR 3 + +/* Canonicalize the symbol name. */ +#define tc_canonicalize_symbol_name(name) ppc_canonicalize_symbol_name (name) +extern char *ppc_canonicalize_symbol_name PARAMS ((char *)); + +/* Get the symbol class from the name. */ +#define tc_symbol_new_hook(sym) ppc_symbol_new_hook (sym) +extern void ppc_symbol_new_hook PARAMS ((struct symbol *)); + +/* Set the symbol class of a label based on the csect. */ +#define tc_frob_label(sym) ppc_frob_label (sym) +extern void ppc_frob_label PARAMS ((struct symbol *)); + +/* TOC relocs requires special handling. */ +#define tc_fix_adjustable(fixp) ppc_fix_adjustable (fixp) +extern int ppc_fix_adjustable PARAMS ((struct fix *)); + +/* A relocation from one csect to another must be kept. */ +#define TC_FORCE_RELOCATION(FIXP) ppc_force_relocation (FIXP) +extern int ppc_force_relocation PARAMS ((struct fix *)); + +/* We need to set the section VMA. */ +#define tc_frob_section(sec) ppc_frob_section (sec) +extern void ppc_frob_section PARAMS ((asection *)); + +/* Finish up the symbol. */ +#define tc_frob_symbol(sym, punt) punt = ppc_frob_symbol (sym) +extern int ppc_frob_symbol PARAMS ((struct symbol *)); + +/* Finish up the entire symtab. */ +#define tc_adjust_symtab() ppc_adjust_symtab () +extern void ppc_adjust_symtab PARAMS ((void)); + +/* Niclas Andersson <nican@ida.liu.se> says this is needed. */ +#define SUB_SEGMENT_ALIGN(SEG) 2 + +#endif /* OBJ_XCOFF */ + +#ifdef OBJ_ELF + +/* Branch prediction relocations must force relocation, as must + the vtable description relocs. */ +#define TC_FORCE_RELOCATION(FIXP) \ +((FIXP)->fx_r_type == BFD_RELOC_PPC_B16_BRTAKEN \ + || (FIXP)->fx_r_type == BFD_RELOC_PPC_B16_BRNTAKEN \ + || (FIXP)->fx_r_type == BFD_RELOC_PPC_BA16_BRTAKEN \ + || (FIXP)->fx_r_type == BFD_RELOC_PPC_BA16_BRNTAKEN \ + || (FIXP)->fx_r_type == BFD_RELOC_VTABLE_INHERIT \ + || (FIXP)->fx_r_type == BFD_RELOC_VTABLE_ENTRY) + +#define TC_FORCE_RELOCATION_SECTION(FIXP,SEC) \ +(TC_FORCE_RELOCATION (FIXP) \ + || ((FIXP)->fx_addsy && !(FIXP)->fx_subsy && (FIXP)->fx_addsy->bsym \ + && (FIXP)->fx_addsy->bsym->section != SEC)) + +/* Support for SHF_EXCLUDE and SHT_ORDERED */ +extern int ppc_section_letter PARAMS ((int, char **)); +extern int ppc_section_type PARAMS ((char **)); +extern int ppc_section_word PARAMS ((char **)); +extern int ppc_section_flags PARAMS ((int, int, int)); + +#define md_elf_section_letter(LETTER, PTR_MSG) ppc_section_letter (LETTER, PTR_MSG) +#define md_elf_section_type(PTR_STR) ppc_section_type (PTR_STR) +#define md_elf_section_word(PTR_STR) ppc_section_word (PTR_STR) +#define md_elf_section_flags(FLAGS, ATTR, TYPE) ppc_section_flags (FLAGS, ATTR, TYPE) + +/* Add extra PPC sections -- Note, for now, make .sbss2 and .PPC.EMB.sbss0 a + normal section, and not a bss section so that the linker doesn't crater + when trying to make more than 2 sections. */ +#define ELF_TC_SPECIAL_SECTIONS \ + { ".tags", SHT_ORDERED, SHF_ALLOC }, \ + { ".sdata", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, \ + { ".sbss", SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, \ + { ".sdata2", SHT_PROGBITS, SHF_ALLOC }, \ + { ".sbss2", SHT_PROGBITS, SHF_ALLOC }, \ + { ".PPC.EMB.sdata0", SHT_PROGBITS, SHF_ALLOC }, \ + { ".PPC.EMB.sbss0", SHT_PROGBITS, SHF_ALLOC }, + +#define tc_comment_chars ppc_comment_chars +extern const char *ppc_comment_chars; + +/* Keep relocations relative to the GOT, or non-PC relative. */ +#define tc_fix_adjustable(FIX) \ + ((FIX)->fx_r_type != BFD_RELOC_16_GOTOFF \ + && (FIX)->fx_r_type != BFD_RELOC_LO16_GOTOFF \ + && (FIX)->fx_r_type != BFD_RELOC_HI16_GOTOFF \ + && (FIX)->fx_r_type != BFD_RELOC_HI16_S_GOTOFF \ + && (FIX)->fx_r_type != BFD_RELOC_GPREL16 \ + && (FIX)->fx_r_type != BFD_RELOC_VTABLE_INHERIT \ + && (FIX)->fx_r_type != BFD_RELOC_VTABLE_ENTRY \ + && ! S_IS_EXTERNAL ((FIX)->fx_addsy) \ + && ! S_IS_WEAK ((FIX)->fx_addsy) \ + && ((FIX)->fx_pcrel \ + || ((FIX)->fx_subsy != NULL \ + && (S_GET_SEGMENT ((FIX)->fx_subsy) \ + == S_GET_SEGMENT ((FIX)->fx_addsy))) \ + || strchr (S_GET_NAME ((FIX)->fx_addsy), '\001') != NULL \ + || strchr (S_GET_NAME ((FIX)->fx_addsy), '\002') != NULL)) + +/* We must never ever try to resolve references to externally visible + symbols in the assembler, because the .o file might go into a shared + library, and some other shared library might override that symbol. */ +#define TC_RELOC_RTSYM_LOC_FIXUP(FIX) \ + ((FIX)->fx_addsy == NULL \ + || (! S_IS_EXTERNAL ((FIX)->fx_addsy) \ + && ! S_IS_WEAK ((FIX)->fx_addsy) \ + && S_IS_DEFINED ((FIX)->fx_addsy) \ + && ! S_IS_COMMON ((FIX)->fx_addsy))) + +#endif /* OBJ_ELF */ + +/* call md_apply_fix3 with segment instead of md_apply_fix */ +#define MD_APPLY_FIX3 + +/* call md_pcrel_from_section, not md_pcrel_from */ +#define MD_PCREL_FROM_SECTION(FIXP, SEC) md_pcrel_from_section(FIXP, SEC) +extern long md_pcrel_from_section PARAMS ((struct fix *, segT)); + +#define md_parse_name(name, exp) ppc_parse_name (name, exp) +extern int ppc_parse_name PARAMS ((const char *, struct expressionS *)); + +#define md_operand(x) + |