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

/* tc-ppc.h -- Header file for tc-ppc.c.
   Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
   2004, 2005, 2006, 2007, 2008 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 3, 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, 51 Franklin Street - Fifth Floor, Boston, MA
   02110-1301, USA.  */

#define TC_PPC

#include "opcode/ppc.h"

struct fix;

/* Set the endianness we are using.  Default to big endian.  */
#ifndef TARGET_BYTES_BIG_ENDIAN
#define TARGET_BYTES_BIG_ENDIAN 1
#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 (void);
extern unsigned long ppc_mach (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 (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)				\
    ppc_handle_align (FRAGP);

extern void ppc_handle_align (struct frag *);

#define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0

#define md_frag_check(FRAGP) \
  if ((FRAGP)->has_code							\
      && (((FRAGP)->fr_address + (FRAGP)->insn_addr) & 3) != 0)		\
    as_bad_where ((FRAGP)->fr_file, (FRAGP)->fr_line,			\
		  _("instruction address is not a multiple of 4"));

/* Arrange to store the value of ppc_cpu at the site of a fixup
   for later use in md_apply_fix.  */
struct _ppc_fix_extra
{
  ppc_cpu_t ppc_cpu;
};

extern ppc_cpu_t ppc_cpu;

#define TC_FIX_TYPE struct _ppc_fix_extra
#define TC_INIT_FIX_DATA(FIXP) \
  do { (FIXP)->tc_fix_data.ppc_cpu = ppc_cpu; } while (0)
\f
#ifdef TE_PE

/* Question marks are permitted in symbol names.  */
#define LEX_QM 1

/* Don't adjust TOC relocs.  */
#define tc_fix_adjustable(FIX) ppc_pe_fix_adjustable (FIX)
extern int ppc_pe_fix_adjustable (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 (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 (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 (symbolS *);

/* TOC relocs requires special handling.  */
#define tc_fix_adjustable(FIX) ppc_fix_adjustable (FIX)
extern int ppc_fix_adjustable (struct fix *);

/* We need to set the section VMA.  */
#define tc_frob_section(sec) ppc_frob_section (sec)
extern void ppc_frob_section (asection *);

/* Finish up the symbol.  */
#define tc_frob_symbol(sym, punt) punt = ppc_frob_symbol (sym)
extern int ppc_frob_symbol (symbolS *);

/* Finish up the entire symtab.  */
#define tc_adjust_symtab() ppc_adjust_symtab ()
extern void ppc_adjust_symtab (void);

/* 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 */

extern const char       ppc_symbol_chars[];
#define tc_symbol_chars ppc_symbol_chars

#ifdef OBJ_ELF

/* Support for SHF_EXCLUDE and SHT_ORDERED */
extern bfd_vma ppc_section_letter (int, char **);
extern int ppc_section_type (char *, size_t);
extern bfd_vma ppc_section_word (char *, size_t);
extern int ppc_section_flags (flagword, bfd_vma, 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)

#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(FIX) ppc_fix_adjustable (FIX)
extern int ppc_fix_adjustable (struct fix *);

/* Values passed to md_apply_fix don't include symbol values.  */
#define MD_APPLY_SYM_VALUE(FIX) 0

#define tc_frob_file_before_adjust ppc_frob_file_before_adjust
extern void ppc_frob_file_before_adjust (void);

#endif /* OBJ_ELF */

#if defined (OBJ_ELF) || defined (OBJ_XCOFF)
#define TC_FORCE_RELOCATION(FIX) ppc_force_relocation (FIX)
extern int ppc_force_relocation (struct fix *);
#endif

/* call md_pcrel_from_section, not md_pcrel_from */
#define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from_section(FIX, SEC)
extern long md_pcrel_from_section (struct fix *, segT);

#define md_parse_name(name, exp, mode, c) ppc_parse_name (name, exp)
extern int ppc_parse_name (const char *, struct expressionS *);

#define md_operand(x)

#define md_cleanup() ppc_cleanup ()
extern void ppc_cleanup (void);

#define TARGET_USE_CFIPOP 1

#define tc_cfi_frame_initial_instructions ppc_cfi_frame_initial_instructions
extern void ppc_cfi_frame_initial_instructions (void);

#define tc_regname_to_dw2regnum tc_ppc_regname_to_dw2regnum
extern int tc_ppc_regname_to_dw2regnum (char *);

extern int ppc_cie_data_alignment;

#define DWARF2_LINE_MIN_INSN_LENGTH     4
#define DWARF2_DEFAULT_RETURN_COLUMN    0x41
#define DWARF2_CIE_DATA_ALIGNMENT       ppc_cie_data_alignment
Commit	Line	Data
	1	/* tc-ppc.h -- Header file for tc-ppc.c.
	2	Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
	3	2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
	4	Written by Ian Lance Taylor, Cygnus Support.
	5
	6	This file is part of GAS, the GNU Assembler.
	7
	8	GAS is free software; you can redistribute it and/or modify
	9	it under the terms of the GNU General Public License as published by
	10	the Free Software Foundation; either version 3, or (at your option)
	11	any later version.
	12
	13	GAS is distributed in the hope that it will be useful,
	14	but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	GNU General Public License for more details.
	17
	18	You should have received a copy of the GNU General Public License
	19	along with GAS; see the file COPYING. If not, write to the Free
	20	Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
	21	02110-1301, USA. */
	22
	23	#define TC_PPC
	24
	25	#include "opcode/ppc.h"
	26
	27	struct fix;
	28
	29	/* Set the endianness we are using. Default to big endian. */
	30	#ifndef TARGET_BYTES_BIG_ENDIAN
	31	#define TARGET_BYTES_BIG_ENDIAN 1
	32	#endif
	33
	34	/* If OBJ_COFF is defined, and TE_PE is not defined, we are assembling
	35	XCOFF for AIX or PowerMac. If TE_PE is defined, we are assembling
	36	COFF for Windows NT. */
	37
	38	#ifdef OBJ_COFF
	39	#ifndef TE_PE
	40	#define OBJ_XCOFF
	41	#endif
	42	#endif
	43
	44	/* The target BFD architecture. */
	45	#define TARGET_ARCH (ppc_arch ())
	46	#define TARGET_MACH (ppc_mach ())
	47	extern enum bfd_architecture ppc_arch (void);
	48	extern unsigned long ppc_mach (void);
	49
	50	/* Whether or not the target is big endian */
	51	extern int target_big_endian;
	52
	53	/* The target BFD format. */
	54	#define TARGET_FORMAT (ppc_target_format ())
	55	extern char *ppc_target_format (void);
	56
	57	/* Permit temporary numeric labels. */
	58	#define LOCAL_LABELS_FB 1
	59
	60	/* $ is used to refer to the current location. */
	61	#define DOLLAR_DOT
	62
	63	/* Strings do not use backslash escapes under COFF. */
	64	#ifdef OBJ_COFF
	65	#define NO_STRING_ESCAPES
	66	#endif
	67
	68	#ifdef OBJ_ELF
	69	#define DIFF_EXPR_OK /* foo-. gets turned into PC relative relocs */
	70	#endif
	71
	72	#if TARGET_BYTES_BIG_ENDIAN
	73	#define PPC_BIG_ENDIAN 1
	74	#else
	75	#define PPC_BIG_ENDIAN 0
	76	#endif
	77
	78	/* We don't need to handle .word strangely. */
	79	#define WORKING_DOT_WORD
	80
	81	#define MAX_MEM_FOR_RS_ALIGN_CODE 4
	82	#define HANDLE_ALIGN(FRAGP) \
	83	if ((FRAGP)->fr_type == rs_align_code) \
	84	ppc_handle_align (FRAGP);
	85
	86	extern void ppc_handle_align (struct frag *);
	87
	88	#define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0
	89
	90	#define md_frag_check(FRAGP) \
	91	if ((FRAGP)->has_code \
	92	&& (((FRAGP)->fr_address + (FRAGP)->insn_addr) & 3) != 0) \
	93	as_bad_where ((FRAGP)->fr_file, (FRAGP)->fr_line, \
	94	_("instruction address is not a multiple of 4"));
	95
	96	/* Arrange to store the value of ppc_cpu at the site of a fixup
	97	for later use in md_apply_fix. */
	98	struct _ppc_fix_extra
	99	{
	100	ppc_cpu_t ppc_cpu;
	101	};
	102
	103	extern ppc_cpu_t ppc_cpu;
	104
	105	#define TC_FIX_TYPE struct _ppc_fix_extra
	106	#define TC_INIT_FIX_DATA(FIXP) \
	107	do { (FIXP)->tc_fix_data.ppc_cpu = ppc_cpu; } while (0)
	108	\f
	109	#ifdef TE_PE
	110
	111	/* Question marks are permitted in symbol names. */
	112	#define LEX_QM 1
	113
	114	/* Don't adjust TOC relocs. */
	115	#define tc_fix_adjustable(FIX) ppc_pe_fix_adjustable (FIX)
	116	extern int ppc_pe_fix_adjustable (struct fix *);
	117
	118	#endif
	119
	120	#ifdef OBJ_XCOFF
	121
	122	/* Declarations needed when generating XCOFF code. XCOFF is an
	123	extension of COFF, used only on the RS/6000. Rather than create an
	124	obj-xcoff, we just use obj-coff, and handle the extensions here in
	125	tc-ppc. */
	126
	127	/* We need to keep some information for symbols. */
	128	struct ppc_tc_sy
	129	{
	130	/* We keep a few linked lists of symbols. */
	131	symbolS *next;
	132	/* Non-zero if the symbol should be output. The RS/6000 assembler
	133	only outputs symbols that are external or are mentioned in a
	134	.globl or .lglobl statement. */
	135	int output;
	136	/* The symbol class. */
	137	int class;
	138	/* The real name, if the symbol was renamed. */
	139	char *real_name;
	140	/* For a csect symbol, the subsegment we are using. This is zero
	141	for symbols that are not csects. */
	142	subsegT subseg;
	143	/* For a csect or common symbol, the alignment to use. */
	144	int align;
	145	/* For a function symbol, a symbol whose value is the size. The
	146	field is NULL if there is no size. */
	147	symbolS *size;
	148	/* For a csect symbol, the last symbol which has been defined in
	149	this csect, or NULL if none have been defined so far. For a .bs
	150	symbol, the referenced csect symbol. */
	151	symbolS *within;
	152	};
	153
	154	#define TC_SYMFIELD_TYPE struct ppc_tc_sy
	155
	156	/* We need an additional auxent for function symbols. */
	157	#define OBJ_COFF_MAX_AUXENTRIES 2
	158
	159	/* Square and curly brackets are permitted in symbol names. */
	160	#define LEX_BR 3
	161
	162	/* Canonicalize the symbol name. */
	163	#define tc_canonicalize_symbol_name(name) ppc_canonicalize_symbol_name (name)
	164	extern char ppc_canonicalize_symbol_name (char );
	165
	166	/* Get the symbol class from the name. */
	167	#define tc_symbol_new_hook(sym) ppc_symbol_new_hook (sym)
	168	extern void ppc_symbol_new_hook (symbolS *);
	169
	170	/* Set the symbol class of a label based on the csect. */
	171	#define tc_frob_label(sym) ppc_frob_label (sym)
	172	extern void ppc_frob_label (symbolS *);
	173
	174	/* TOC relocs requires special handling. */
	175	#define tc_fix_adjustable(FIX) ppc_fix_adjustable (FIX)
	176	extern int ppc_fix_adjustable (struct fix *);
	177
	178	/* We need to set the section VMA. */
	179	#define tc_frob_section(sec) ppc_frob_section (sec)
	180	extern void ppc_frob_section (asection *);
	181
	182	/* Finish up the symbol. */
	183	#define tc_frob_symbol(sym, punt) punt = ppc_frob_symbol (sym)
	184	extern int ppc_frob_symbol (symbolS *);
	185
	186	/* Finish up the entire symtab. */
	187	#define tc_adjust_symtab() ppc_adjust_symtab ()
	188	extern void ppc_adjust_symtab (void);
	189
	190	/* We also need to copy, in particular, the class of the symbol,
	191	over what obj-coff would otherwise have copied. */
	192	#define OBJ_COPY_SYMBOL_ATTRIBUTES(dest,src) \
	193	do { \
	194	if (SF_GET_GET_SEGMENT (dest)) \
	195	S_SET_SEGMENT (dest, S_GET_SEGMENT (src)); \
	196	symbol_get_tc (dest)->size = symbol_get_tc (src)->size; \
	197	symbol_get_tc (dest)->align = symbol_get_tc (src)->align; \
	198	symbol_get_tc (dest)->class = symbol_get_tc (src)->class; \
	199	symbol_get_tc (dest)->within = symbol_get_tc (src)->within; \
	200	} while (0)
	201
	202	#endif /* OBJ_XCOFF */
	203
	204	extern const char ppc_symbol_chars[];
	205	#define tc_symbol_chars ppc_symbol_chars
	206
	207	#ifdef OBJ_ELF
	208
	209	/* Support for SHF_EXCLUDE and SHT_ORDERED */
	210	extern bfd_vma ppc_section_letter (int, char **);
	211	extern int ppc_section_type (char *, size_t);
	212	extern bfd_vma ppc_section_word (char *, size_t);
	213	extern int ppc_section_flags (flagword, bfd_vma, int);
	214
	215	#define md_elf_section_letter(LETTER, PTR_MSG) ppc_section_letter (LETTER, PTR_MSG)
	216	#define md_elf_section_type(STR, LEN) ppc_section_type (STR, LEN)
	217	#define md_elf_section_word(STR, LEN) ppc_section_word (STR, LEN)
	218	#define md_elf_section_flags(FLAGS, ATTR, TYPE) ppc_section_flags (FLAGS, ATTR, TYPE)
	219
	220	#define tc_comment_chars ppc_comment_chars
	221	extern const char *ppc_comment_chars;
	222
	223	/* Keep relocations relative to the GOT, or non-PC relative. */
	224	#define tc_fix_adjustable(FIX) ppc_fix_adjustable (FIX)
	225	extern int ppc_fix_adjustable (struct fix *);
	226
	227	/* Values passed to md_apply_fix don't include symbol values. */
	228	#define MD_APPLY_SYM_VALUE(FIX) 0
	229
	230	#define tc_frob_file_before_adjust ppc_frob_file_before_adjust
	231	extern void ppc_frob_file_before_adjust (void);
	232
	233	#endif /* OBJ_ELF */
	234
	235	#if defined (OBJ_ELF) \|\| defined (OBJ_XCOFF)
	236	#define TC_FORCE_RELOCATION(FIX) ppc_force_relocation (FIX)
	237	extern int ppc_force_relocation (struct fix *);
	238	#endif
	239
	240	/* call md_pcrel_from_section, not md_pcrel_from */
	241	#define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from_section(FIX, SEC)
	242	extern long md_pcrel_from_section (struct fix *, segT);
	243
	244	#define md_parse_name(name, exp, mode, c) ppc_parse_name (name, exp)
	245	extern int ppc_parse_name (const char , struct expressionS );
	246
	247	#define md_operand(x)
	248
	249	#define md_cleanup() ppc_cleanup ()
	250	extern void ppc_cleanup (void);
	251
	252	#define TARGET_USE_CFIPOP 1
	253
	254	#define tc_cfi_frame_initial_instructions ppc_cfi_frame_initial_instructions
	255	extern void ppc_cfi_frame_initial_instructions (void);
	256
	257	#define tc_regname_to_dw2regnum tc_ppc_regname_to_dw2regnum
	258	extern int tc_ppc_regname_to_dw2regnum (char *);
	259
	260	extern int ppc_cie_data_alignment;
	261
	262	#define DWARF2_LINE_MIN_INSN_LENGTH 4
	263	#define DWARF2_DEFAULT_RETURN_COLUMN 0x41
	264	#define DWARF2_CIE_DATA_ALIGNMENT ppc_cie_data_alignment