| /* tc-ppc.h -- Header file for tc-ppc.c. |
| Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001 |
| 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 ()) |
| #define TARGET_MACH (ppc_mach ()) |
| extern enum bfd_architecture ppc_arch PARAMS ((void)); |
| extern unsigned long ppc_mach PARAMS ((void)); |
| |
| /* Whether or not the target is big endian */ |
| extern int target_big_endian; |
| |
| /* The target BFD format. */ |
| #define TARGET_FORMAT (ppc_target_format ()) |
| extern char *ppc_target_format PARAMS ((void)); |
| |
| /* 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 |
| |
| #define MAX_MEM_FOR_RS_ALIGN_CODE 4 |
| #define HANDLE_ALIGN(FRAGP) \ |
| if ((FRAGP)->fr_type == rs_align_code) \ |
| { \ |
| valueT count = ((FRAGP)->fr_next->fr_address \ |
| - ((FRAGP)->fr_address + (FRAGP)->fr_fix)); \ |
| if (count != 0 && (count & 3) == 0) \ |
| { \ |
| unsigned char *dest = (FRAGP)->fr_literal + (FRAGP)->fr_fix; \ |
| \ |
| (FRAGP)->fr_var = 4; \ |
| if (target_big_endian) \ |
| { \ |
| *dest++ = 0x60; \ |
| *dest++ = 0; \ |
| *dest++ = 0; \ |
| *dest++ = 0; \ |
| } \ |
| else \ |
| { \ |
| *dest++ = 0; \ |
| *dest++ = 0; \ |
| *dest++ = 0; \ |
| *dest++ = 0x60; \ |
| } \ |
| } \ |
| } |
| |
| |
| #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. */ |
| symbolS *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. */ |
| symbolS *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. */ |
| symbolS *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 ((symbolS *)); |
| |
| /* 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 ((symbolS *)); |
| |
| /* 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 ((symbolS *)); |
| |
| /* 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. */ |
| extern int ppc_subseg_align PARAMS ((void)); |
| #define SUB_SEGMENT_ALIGN(SEG) ppc_subseg_align() |
| |
| /* We also need to copy, in particular, the class of the symbol, |
| over what obj-coff would otherwise have copied. */ |
| #define OBJ_COPY_SYMBOL_ATTRIBUTES(dest,src) \ |
| do { \ |
| if (SF_GET_GET_SEGMENT (dest)) \ |
| S_SET_SEGMENT (dest, S_GET_SEGMENT (src)); \ |
| symbol_get_tc (dest)->size = symbol_get_tc (src)->size; \ |
| symbol_get_tc (dest)->align = symbol_get_tc (src)->align; \ |
| symbol_get_tc (dest)->class = symbol_get_tc (src)->class; \ |
| symbol_get_tc (dest)->within = symbol_get_tc (src)->within; \ |
| } while (0) |
| |
| #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 \ |
| || (BFD_DEFAULT_TARGET_SIZE == 64 \ |
| && (FIXP)->fx_r_type == BFD_RELOC_PPC64_TOC) \ |
| || (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 \ |
| && S_GET_SEGMENT ((FIXP)->fx_addsy) != SEC)) |
| |
| /* Support for SHF_EXCLUDE and SHT_ORDERED */ |
| extern int ppc_section_letter PARAMS ((int, char **)); |
| extern int ppc_section_type PARAMS ((char *, size_t)); |
| extern int ppc_section_word PARAMS ((char *, size_t)); |
| 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(STR, LEN) ppc_section_type (STR, LEN) |
| #define md_elf_section_word(STR, LEN) ppc_section_word (STR, LEN) |
| #define md_elf_section_flags(FLAGS, ATTR, TYPE) ppc_section_flags (FLAGS, ATTR, TYPE) |
| |
| #if BFD_DEFAULT_TARGET_SIZE == 64 |
| /* Extra sections for 64-bit ELF PPC. */ |
| #define ELF_TC_SPECIAL_SECTIONS \ |
| { ".toc", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE}, \ |
| { ".tocbss", SHT_NOBITS, SHF_ALLOC + SHF_WRITE}, |
| #else |
| /* 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 }, |
| #endif |
| |
| #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(fixp) ppc_fix_adjustable (fixp) |
| extern int ppc_fix_adjustable PARAMS ((struct fix *)); |
| |
| /* 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))) |
| |
| #if BFD_DEFAULT_TARGET_SIZE == 64 |
| /* Finish up the symbol. */ |
| #define tc_frob_symbol(sym, punt) punt = ppc_elf_frob_symbol (sym) |
| extern int ppc_elf_frob_symbol PARAMS ((symbolS *)); |
| #endif |
| |
| #define DWARF2_LINE_MIN_INSN_LENGTH 4 |
| #endif /* OBJ_ELF */ |
| |
| /* 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, c) ppc_parse_name (name, exp) |
| extern int ppc_parse_name PARAMS ((const char *, struct expressionS *)); |
| |
| #define md_operand(x) |