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

/* tc-ppc.h -- Header file for tc-ppc.c.
   Copyright (C) 1994 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
#ifndef TARGET_BYTES_LITTLE_ENDIAN
#define TARGET_BYTES_BIG_ENDIAN 1
#endif
#endif

#ifdef 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 *));

/* 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)
#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_operand(x)
Commit	Line	Data
da8fa3ba MM	1	/* tc-ppc.h -- Header file for tc-ppc.c.
	2	Copyright (C) 1994 Free Software Foundation, Inc.
	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
	18	along with GAS; see the file COPYING. If not, write to
65c91be5	19	the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
da8fa3ba MM	20
	21	#define TC_PPC
	22
	23	#ifndef BFD_ASSEMBLER
	24	#error PowerPC support requires BFD_ASSEMBLER
	25	#endif
	26
18c9057f	27	/* If OBJ_COFF is defined, and TE_PE is not defined, we are assembling
f99d287b MM	28	XCOFF for AIX or PowerMac. If TE_PE is defined, we are assembling
f99d287b MM	29	COFF for Windows NT. */
18c9057f ILT	30
	31	#ifdef OBJ_COFF
	32	#ifndef TE_PE
	33	#define OBJ_XCOFF
	34	#endif
	35	#endif
	36
da8fa3ba MM	37	/* The target BFD architecture. */
	38	#define TARGET_ARCH (ppc_arch ())
	39	extern enum bfd_architecture ppc_arch PARAMS ((void));
	40
65c91be5 MM	41	/* Whether or not the target is big endian */
	42	extern int target_big_endian;
	43
da8fa3ba MM	44	/* The target BFD format. */
da8fa3ba MM	45	#ifdef OBJ_COFF
1d854da6	46	#ifdef TE_PE
18c9057f	47	#define TARGET_FORMAT (target_big_endian ? "pe-powerpc" : "pe-powerpcle")
1d854da6	48	#else
da8fa3ba MM	49	#define TARGET_FORMAT "aixcoff-rs6000"
da8fa3ba MM	50	#endif
1d854da6 KK	51	#endif
1d854da6 KK	52
f99d287b MM	53	/* PowerMac has a BFD slightly different from AIX's. */
	54	#ifdef TE_POWERMAC
	55	#ifdef TARGET_FORMAT
	56	#undef TARGET_FORMAT
	57	#endif
	58	#define TARGET_FORMAT "xcoff-powermac"
	59	#endif
	60
da8fa3ba	61	#ifdef OBJ_ELF
18c9057f	62	#define TARGET_FORMAT (target_big_endian ? "elf32-powerpc" : "elf32-powerpcle")
da8fa3ba MM	63	#endif
	64
	65	/* Permit temporary numeric labels. */
9777b772	66	#define LOCAL_LABELS_FB 1
da8fa3ba MM	67
	68	/* $ is used to refer to the current location. */
	69	#define DOLLAR_DOT
	70
9777b772 KR	71	/* Strings do not use backslash escapes under COFF. */
9777b772 KR	72	#ifdef OBJ_COFF
da8fa3ba	73	#define NO_STRING_ESCAPES
9777b772	74	#endif
da8fa3ba	75
da8fa3ba MM	76	/* When using COFF, we determine whether or not to output a symbol
da8fa3ba MM	77	based on sy_tc.output, not on the name. */
18c9057f	78	#ifdef OBJ_XCOFF
da8fa3ba MM	79	#define LOCAL_LABEL(name) 0
	80	#endif
	81	#ifdef OBJ_ELF
	82	/* When using ELF, local labels start with '.'. */
	83	#define LOCAL_LABEL(name) (name[0] == '.' \
	84	&& (name[1] == 'L' \|\| name[1] == '.'))
	85	#define FAKE_LABEL_NAME ".L0\001"
9777b772	86	#define DIFF_EXPR_OK /* .-foo gets turned into PC relative relocs */
da8fa3ba MM	87	#endif
	88
	89	/* Set the endianness we are using. Default to big endian. */
	90	#ifndef TARGET_BYTES_BIG_ENDIAN
	91	#ifndef TARGET_BYTES_LITTLE_ENDIAN
65c91be5	92	#define TARGET_BYTES_BIG_ENDIAN 1
da8fa3ba MM	93	#endif
	94	#endif
	95
	96	#ifdef TARGET_BYTES_BIG_ENDIAN
	97	#define PPC_BIG_ENDIAN 1
	98	#else
	99	#define PPC_BIG_ENDIAN 0
	100	#endif
	101
	102	/* We don't need to handle .word strangely. */
	103	#define WORKING_DOT_WORD
	104
	105	/* We set the fx_done field appropriately in md_apply_fix. */
	106	#define TC_HANDLES_FX_DONE
	107	\f
18c9057f ILT	108	#ifdef TE_PE
	109
	110	/* Question marks are permitted in symbol names. */
	111	#define LEX_QM 1
	112
96fe71e1 MM	113	/* Don't adjust TOC relocs. */
	114	#define tc_fix_adjustable(fixp) ppc_pe_fix_adjustable (fixp)
	115	extern int ppc_pe_fix_adjustable PARAMS ((struct fix *));
	116
18c9057f ILT	117	#endif
	118
	119	#ifdef OBJ_XCOFF
da8fa3ba MM	120
	121	/* Declarations needed when generating XCOFF code. XCOFF is an
	122	extension of COFF, used only on the RS/6000. Rather than create an
	123	obj-xcoff, we just use obj-coff, and handle the extensions here in
	124	tc-ppc. */
	125
	126	/* We need to keep some information for symbols. */
	127	struct ppc_tc_sy
	128	{
	129	/* We keep a few linked lists of symbols. */
	130	struct symbol *next;
	131	/* Non-zero if the symbol should be output. The RS/6000 assembler
	132	only outputs symbols that are external or are mentioned in a
	133	.globl or .lglobl statement. */
	134	int output;
	135	/* The symbol class. */
	136	int class;
	137	/* The real name, if the symbol was renamed. */
	138	char *real_name;
	139	/* For a csect symbol, the subsegment we are using. This is zero
	140	for symbols that are not csects. */
	141	subsegT subseg;
	142	/* For a csect or common symbol, the alignment to use. */
	143	int align;
	144	/* For a function symbol, a symbol whose value is the size. The
	145	field is NULL if there is no size. */
	146	struct symbol *size;
	147	/* For a csect symbol, the last symbol which has been defined in
	148	this csect, or NULL if none have been defined so far. For a .bs
	149	symbol, the referenced csect symbol. */
	150	struct symbol *within;
	151	};
	152
	153	#define TC_SYMFIELD_TYPE struct ppc_tc_sy
	154
	155	/* We need an additional auxent for function symbols. */
	156	#define OBJ_COFF_MAX_AUXENTRIES 2
	157
	158	/* Square and curly brackets are permitted in symbol names. */
	159	#define LEX_BR 3
	160
	161	/* Canonicalize the symbol name. */
	162	#define tc_canonicalize_symbol_name(name) ppc_canonicalize_symbol_name (name)
	163	extern char ppc_canonicalize_symbol_name PARAMS ((char ));
	164
	165	/* Get the symbol class from the name. */
	166	#define tc_symbol_new_hook(sym) ppc_symbol_new_hook (sym)
	167	extern void ppc_symbol_new_hook PARAMS ((struct symbol *));
	168
	169	/* Set the symbol class of a label based on the csect. */
	170	#define tc_frob_label(sym) ppc_frob_label (sym)
	171	extern void ppc_frob_label PARAMS ((struct symbol *));
	172
	173	/* TOC relocs requires special handling. */
	174	#define tc_fix_adjustable(fixp) ppc_fix_adjustable (fixp)
	175	extern int ppc_fix_adjustable PARAMS ((struct fix *));
	176
	177	/* We need to set the section VMA. */
	178	#define tc_frob_section(sec) ppc_frob_section (sec)
	179	extern void ppc_frob_section PARAMS ((asection *));
	180
	181	/* Finish up the symbol. */
	182	#define tc_frob_symbol(sym, punt) punt = ppc_frob_symbol (sym)
	183	extern int ppc_frob_symbol PARAMS ((struct symbol *));
184
f99d287b MM	185	/* Finish up the entire symtab. */
	186	#define tc_adjust_symtab() ppc_adjust_symtab ()
	187	extern void ppc_adjust_symtab PARAMS ((void));
	188
65c91be5 MM	189	/* Niclas Andersson <nican@ida.liu.se> says this is needed. */
	190	#define SUB_SEGMENT_ALIGN(SEG) 2
	191
18c9057f	192	#endif /* OBJ_XCOFF */
da8fa3ba MM	193
	194	#ifdef OBJ_ELF
	195	/* The name of the global offset table generated by the compiler. Allow
	196	this to be overridden if need be. */
	197	#ifndef GLOBAL_OFFSET_TABLE_NAME
	198	#define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
	199	#endif
65c91be5 MM	200
65c91be5 MM	201	/* Branch prediction relocations must force relocation */
96fe71e1	202	#define TC_FORCE_RELOCATION_SECTION(FIXP,SEC) \
65c91be5 MM	203	((FIXP)->fx_r_type == BFD_RELOC_PPC_B16_BRTAKEN \
	204	\|\| (FIXP)->fx_r_type == BFD_RELOC_PPC_B16_BRNTAKEN \
	205	\|\| (FIXP)->fx_r_type == BFD_RELOC_PPC_BA16_BRTAKEN \
96fe71e1 MM	206	\|\| (FIXP)->fx_r_type == BFD_RELOC_PPC_BA16_BRNTAKEN \
	207	\|\| ((FIXP)->fx_addsy && !(FIXP)->fx_subsy && (FIXP)->fx_addsy->bsym \
	208	&& (FIXP)->fx_addsy->bsym->section != SEC))
65c91be5	209
f99d287b MM	210	/* Support for SHF_EXCLUDE and SHT_ORDERED */
	211	extern int ppc_section_letter PARAMS ((int, char **));
	212	extern int ppc_section_type PARAMS ((char **));
	213	extern int ppc_section_word PARAMS ((char **));
	214	extern int ppc_section_flags PARAMS ((int, int, int));
	215
	216	#define md_elf_section_letter(LETTER, PTR_MSG) ppc_section_letter (LETTER, PTR_MSG)
	217	#define md_elf_section_type(PTR_STR) ppc_section_type (PTR_STR)
	218	#define md_elf_section_word(PTR_STR) ppc_section_word (PTR_STR)
	219	#define md_elf_section_flags(FLAGS, ATTR, TYPE) ppc_section_flags (FLAGS, ATTR, TYPE)
9777b772 KR	220	#endif /* OBJ_ELF */
	221
	222	/* call md_apply_fix3 with segment instead of md_apply_fix */
	223	#define MD_APPLY_FIX3
	224
96fe71e1 MM	225	/* call md_pcrel_from_section, not md_pcrel_from */
	226	#define MD_PCREL_FROM_SECTION(FIXP, SEC) md_pcrel_from_section(FIXP, SEC)
	227
9777b772	228	#define md_operand(x)
f99d287b	229