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/* tc-ppc.h -- Header file for tc-ppc.c.
Copyright (C) 1994, 1995, 1996, 1997 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
/* 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;
/* Keep relocations relative to the GOT. */
#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)
#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)
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