/* tc-ppc.h -- Header file for tc-ppc.c. Copyright (C) 1994, 1995, 1996 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 #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 /* When using COFF, we determine whether or not to output a symbol based on sy_tc.output, not on the name. */ #ifdef OBJ_XCOFF #define LOCAL_LABEL(name) 0 #endif #ifdef OBJ_ELF /* When using ELF, local labels start with '.'. */ #define LOCAL_LABEL(name) (name[0] == '.' \ && (name[1] == 'L' || name[1] == '.')) #define FAKE_LABEL_NAME ".L0\001" #define DIFF_EXPR_OK /* .-foo gets turned into PC relative relocs */ #endif /* Set the endianness we are using. Default to big endian. */ #ifndef TARGET_BYTES_BIG_ENDIAN #define TARGET_BYTES_BIG_ENDIAN 1 #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 says this is needed. */ #define SUB_SEGMENT_ALIGN(SEG) 2 #endif /* OBJ_XCOFF */ #ifdef OBJ_ELF /* The name of the global offset table generated by the compiler. Allow this to be overridden if need be. */ #ifndef GLOBAL_OFFSET_TABLE_NAME #define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_" #endif /* Branch prediction relocations must force relocation */ #define TC_FORCE_RELOCATION_SECTION(FIXP,SEC) \ ((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_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; #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) #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)