[deliverable/binutils-gdb.git] / gas / config / tc-ppc.h

/* 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
\f
#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)
Commit	Line	Data
da8fa3ba	1	/* tc-ppc.h -- Header file for tc-ppc.c.
24a3e622	2	Copyright (C) 1994, 1995, 1996, 1997 Free Software Foundation, Inc.
da8fa3ba MM	3	Written by Ian Lance Taylor, Cygnus Support.
	4
	5	This file is part of GAS, the GNU Assembler.
	6
	7	GAS is free software; you can redistribute it and/or modify
	8	it under the terms of the GNU General Public License as published by
	9	the Free Software Foundation; either version 2, or (at your option)
	10	any later version.
	11
	12	GAS is distributed in the hope that it will be useful,
	13	but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	GNU General Public License for more details.
	16
	17	You should have received a copy of the GNU General Public License
af16e411 FF	18	along with GAS; see the file COPYING. If not, write to the Free
	19	Software Foundation, 59 Temple Place - Suite 330, Boston, MA
	20	02111-1307, USA. */
da8fa3ba MM	21
	22	#define TC_PPC
	23
24a3e622 ILT	24	#ifdef ANSI_PROTOTYPES
	25	struct fix;
	26	#endif
	27
	28	/* Set the endianness we are using. Default to big endian. */
	29	#ifndef TARGET_BYTES_BIG_ENDIAN
	30	#define TARGET_BYTES_BIG_ENDIAN 1
	31	#endif
	32
da8fa3ba MM	33	#ifndef BFD_ASSEMBLER
	34	#error PowerPC support requires BFD_ASSEMBLER
	35	#endif
	36
18c9057f	37	/* If OBJ_COFF is defined, and TE_PE is not defined, we are assembling
f99d287b MM	38	XCOFF for AIX or PowerMac. If TE_PE is defined, we are assembling
f99d287b MM	39	COFF for Windows NT. */
18c9057f ILT	40
	41	#ifdef OBJ_COFF
	42	#ifndef TE_PE
	43	#define OBJ_XCOFF
	44	#endif
	45	#endif
	46
da8fa3ba MM	47	/* The target BFD architecture. */
	48	#define TARGET_ARCH (ppc_arch ())
	49	extern enum bfd_architecture ppc_arch PARAMS ((void));
	50
65c91be5 MM	51	/* Whether or not the target is big endian */
	52	extern int target_big_endian;
	53
da8fa3ba MM	54	/* The target BFD format. */
da8fa3ba MM	55	#ifdef OBJ_COFF
1d854da6	56	#ifdef TE_PE
18c9057f	57	#define TARGET_FORMAT (target_big_endian ? "pe-powerpc" : "pe-powerpcle")
1d854da6	58	#else
da8fa3ba MM	59	#define TARGET_FORMAT "aixcoff-rs6000"
da8fa3ba MM	60	#endif
1d854da6 KK	61	#endif
1d854da6 KK	62
f99d287b MM	63	/* PowerMac has a BFD slightly different from AIX's. */
	64	#ifdef TE_POWERMAC
	65	#ifdef TARGET_FORMAT
	66	#undef TARGET_FORMAT
	67	#endif
	68	#define TARGET_FORMAT "xcoff-powermac"
	69	#endif
	70
da8fa3ba	71	#ifdef OBJ_ELF
18c9057f	72	#define TARGET_FORMAT (target_big_endian ? "elf32-powerpc" : "elf32-powerpcle")
da8fa3ba MM	73	#endif
	74
	75	/* Permit temporary numeric labels. */
9777b772	76	#define LOCAL_LABELS_FB 1
da8fa3ba MM	77
	78	/* $ is used to refer to the current location. */
	79	#define DOLLAR_DOT
	80
9777b772 KR	81	/* Strings do not use backslash escapes under COFF. */
9777b772 KR	82	#ifdef OBJ_COFF
da8fa3ba	83	#define NO_STRING_ESCAPES
9777b772	84	#endif
da8fa3ba	85
da8fa3ba	86	#ifdef OBJ_ELF
9777b772	87	#define DIFF_EXPR_OK /* .-foo gets turned into PC relative relocs */
da8fa3ba MM	88	#endif
da8fa3ba MM	89
af16e411	90	#if TARGET_BYTES_BIG_ENDIAN
da8fa3ba MM	91	#define PPC_BIG_ENDIAN 1
	92	#else
	93	#define PPC_BIG_ENDIAN 0
	94	#endif
	95
	96	/* We don't need to handle .word strangely. */
	97	#define WORKING_DOT_WORD
	98
	99	/* We set the fx_done field appropriately in md_apply_fix. */
	100	#define TC_HANDLES_FX_DONE
	101	\f
18c9057f ILT	102	#ifdef TE_PE
	103
	104	/* Question marks are permitted in symbol names. */
	105	#define LEX_QM 1
	106
96fe71e1 MM	107	/* Don't adjust TOC relocs. */
	108	#define tc_fix_adjustable(fixp) ppc_pe_fix_adjustable (fixp)
	109	extern int ppc_pe_fix_adjustable PARAMS ((struct fix *));
	110
18c9057f ILT	111	#endif
	112
	113	#ifdef OBJ_XCOFF
da8fa3ba MM	114
	115	/* Declarations needed when generating XCOFF code. XCOFF is an
	116	extension of COFF, used only on the RS/6000. Rather than create an
	117	obj-xcoff, we just use obj-coff, and handle the extensions here in
	118	tc-ppc. */
	119
	120	/* We need to keep some information for symbols. */
	121	struct ppc_tc_sy
	122	{
	123	/* We keep a few linked lists of symbols. */
	124	struct symbol *next;
	125	/* Non-zero if the symbol should be output. The RS/6000 assembler
	126	only outputs symbols that are external or are mentioned in a
	127	.globl or .lglobl statement. */
	128	int output;
	129	/* The symbol class. */
	130	int class;
	131	/* The real name, if the symbol was renamed. */
	132	char *real_name;
	133	/* For a csect symbol, the subsegment we are using. This is zero
	134	for symbols that are not csects. */
	135	subsegT subseg;
	136	/* For a csect or common symbol, the alignment to use. */
	137	int align;
	138	/* For a function symbol, a symbol whose value is the size. The
	139	field is NULL if there is no size. */
	140	struct symbol *size;
	141	/* For a csect symbol, the last symbol which has been defined in
	142	this csect, or NULL if none have been defined so far. For a .bs
	143	symbol, the referenced csect symbol. */
	144	struct symbol *within;
	145	};
	146
	147	#define TC_SYMFIELD_TYPE struct ppc_tc_sy
	148
	149	/* We need an additional auxent for function symbols. */
	150	#define OBJ_COFF_MAX_AUXENTRIES 2
	151
	152	/* Square and curly brackets are permitted in symbol names. */
	153	#define LEX_BR 3
	154
	155	/* Canonicalize the symbol name. */
	156	#define tc_canonicalize_symbol_name(name) ppc_canonicalize_symbol_name (name)
	157	extern char ppc_canonicalize_symbol_name PARAMS ((char ));
	158
	159	/* Get the symbol class from the name. */
	160	#define tc_symbol_new_hook(sym) ppc_symbol_new_hook (sym)
	161	extern void ppc_symbol_new_hook PARAMS ((struct symbol *));
	162
	163	/* Set the symbol class of a label based on the csect. */
	164	#define tc_frob_label(sym) ppc_frob_label (sym)
	165	extern void ppc_frob_label PARAMS ((struct symbol *));
	166
	167	/* TOC relocs requires special handling. */
	168	#define tc_fix_adjustable(fixp) ppc_fix_adjustable (fixp)
	169	extern int ppc_fix_adjustable PARAMS ((struct fix *));
	170
af16e411 FF	171	/* A relocation from one csect to another must be kept. */
	172	#define TC_FORCE_RELOCATION(FIXP) ppc_force_relocation (FIXP)
	173	extern int ppc_force_relocation PARAMS ((struct fix *));
	174
da8fa3ba MM	175	/* We need to set the section VMA. */
	176	#define tc_frob_section(sec) ppc_frob_section (sec)
	177	extern void ppc_frob_section PARAMS ((asection *));
	178
	179	/* Finish up the symbol. */
	180	#define tc_frob_symbol(sym, punt) punt = ppc_frob_symbol (sym)
	181	extern int ppc_frob_symbol PARAMS ((struct symbol *));
	182
f99d287b MM	183	/* Finish up the entire symtab. */
	184	#define tc_adjust_symtab() ppc_adjust_symtab ()
	185	extern void ppc_adjust_symtab PARAMS ((void));
	186
65c91be5 MM	187	/* Niclas Andersson <nican@ida.liu.se> says this is needed. */
	188	#define SUB_SEGMENT_ALIGN(SEG) 2
	189
18c9057f	190	#endif /* OBJ_XCOFF */
da8fa3ba MM	191
da8fa3ba MM	192	#ifdef OBJ_ELF
d006e435 MM	193	/* The name of the global offset table generated by the compiler. Allow
	194	this to be overridden if need be. */
	195	#ifndef GLOBAL_OFFSET_TABLE_NAME
	196	#define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
	197	#endif
	198
65c91be5	199	/* Branch prediction relocations must force relocation */
96fe71e1	200	#define TC_FORCE_RELOCATION_SECTION(FIXP,SEC) \
65c91be5 MM	201	((FIXP)->fx_r_type == BFD_RELOC_PPC_B16_BRTAKEN \
	202	\|\| (FIXP)->fx_r_type == BFD_RELOC_PPC_B16_BRNTAKEN \
	203	\|\| (FIXP)->fx_r_type == BFD_RELOC_PPC_BA16_BRTAKEN \
96fe71e1 MM	204	\|\| (FIXP)->fx_r_type == BFD_RELOC_PPC_BA16_BRNTAKEN \
	205	\|\| ((FIXP)->fx_addsy && !(FIXP)->fx_subsy && (FIXP)->fx_addsy->bsym \
	206	&& (FIXP)->fx_addsy->bsym->section != SEC))
65c91be5	207
f99d287b MM	208	/* Support for SHF_EXCLUDE and SHT_ORDERED */
	209	extern int ppc_section_letter PARAMS ((int, char **));
	210	extern int ppc_section_type PARAMS ((char **));
	211	extern int ppc_section_word PARAMS ((char **));
	212	extern int ppc_section_flags PARAMS ((int, int, int));
	213
	214	#define md_elf_section_letter(LETTER, PTR_MSG) ppc_section_letter (LETTER, PTR_MSG)
	215	#define md_elf_section_type(PTR_STR) ppc_section_type (PTR_STR)
	216	#define md_elf_section_word(PTR_STR) ppc_section_word (PTR_STR)
	217	#define md_elf_section_flags(FLAGS, ATTR, TYPE) ppc_section_flags (FLAGS, ATTR, TYPE)
af16e411 FF	218
	219	/* Add extra PPC sections -- Note, for now, make .sbss2 and .PPC.EMB.sbss0 a
	220	normal section, and not a bss section so that the linker doesn't crater
	221	when trying to make more than 2 sections. */
	222	#define ELF_TC_SPECIAL_SECTIONS \
	223	{ ".tags", SHT_ORDERED, SHF_ALLOC }, \
	224	{ ".sdata", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, \
	225	{ ".sbss", SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, \
	226	{ ".sdata2", SHT_PROGBITS, SHF_ALLOC }, \
	227	{ ".sbss2", SHT_PROGBITS, SHF_ALLOC }, \
	228	{ ".PPC.EMB.sdata0", SHT_PROGBITS, SHF_ALLOC }, \
	229	{ ".PPC.EMB.sbss0", SHT_PROGBITS, SHF_ALLOC },
	230
	231	#define tc_comment_chars ppc_comment_chars
	232	extern const char *ppc_comment_chars;
	233
d006e435 MM	234	/* Keep relocations relative to the GOT. */
	235	#define tc_fix_adjustable(FIX) \
	236	((FIX)->fx_r_type != BFD_RELOC_16_GOTOFF \
	237	&& (FIX)->fx_r_type != BFD_RELOC_LO16_GOTOFF \
	238	&& (FIX)->fx_r_type != BFD_RELOC_HI16_GOTOFF \
	239	&& (FIX)->fx_r_type != BFD_RELOC_HI16_S_GOTOFF \
	240	&& (FIX)->fx_r_type != BFD_RELOC_GPREL16)
9777b772 KR	241	#endif /* OBJ_ELF */
	242
	243	/* call md_apply_fix3 with segment instead of md_apply_fix */
	244	#define MD_APPLY_FIX3
	245
96fe71e1 MM	246	/* call md_pcrel_from_section, not md_pcrel_from */
96fe71e1 MM	247	#define MD_PCREL_FROM_SECTION(FIXP, SEC) md_pcrel_from_section(FIXP, SEC)
24a3e622	248	extern long md_pcrel_from_section PARAMS ((struct fix *, segT));
96fe71e1	249
af16e411 FF	250	#define md_parse_name(name, exp) ppc_parse_name (name, exp)
	251	extern int ppc_parse_name PARAMS ((const char , struct expressionS ));
	252
9777b772	253	#define md_operand(x)
f99d287b	254