[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 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, 51 Franklin Street - Fifth Floor, Boston, MA
   02110-1301, USA.  */

#define TC_PPC

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 PARAMS ((void));
extern unsigned long ppc_mach PARAMS ((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 PARAMS ((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) 				\
    {									\
      valueT count = ((FRAGP)->fr_next->fr_address			\
		      - ((FRAGP)->fr_address + (FRAGP)->fr_fix));	\
      if (count != 0 && (count & 3) == 0)				\
	{								\
	  char *dest = (FRAGP)->fr_literal + (FRAGP)->fr_fix;		\
									\
	  (FRAGP)->fr_var = 4;						\
	  if (target_big_endian)					\
	    {								\
	      *dest++ = 0x60;						\
	      *dest++ = 0;						\
	      *dest++ = 0;						\
	      *dest++ = 0;						\
	    }								\
	  else								\
	    {								\
	      *dest++ = 0;						\
	      *dest++ = 0;						\
	      *dest++ = 0;						\
	      *dest++ = 0x60;						\
	    }								\
	}								\
    }

#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"));
\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 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.  */
  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 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 ((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 PARAMS ((symbolS *));

/* TOC relocs requires special handling.  */
#define tc_fix_adjustable(FIX) ppc_fix_adjustable (FIX)
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 ((symbolS *));

/* Finish up the entire symtab.  */
#define tc_adjust_symtab() ppc_adjust_symtab ()
extern void ppc_adjust_symtab PARAMS ((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 int ppc_section_letter PARAMS ((int, char **));
extern int ppc_section_type PARAMS ((char *, size_t));
extern int ppc_section_word PARAMS ((char *, size_t));
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(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 PARAMS ((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 PARAMS ((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 PARAMS ((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 PARAMS ((struct fix *, segT));

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

#define md_operand(x)

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

#define TARGET_USE_CFIPOP 1

#define tc_cfi_frame_initial_instructions ppc_cfi_frame_initial_instructions
extern void ppc_cfi_frame_initial_instructions PARAMS ((void));

#define tc_regname_to_dw2regnum tc_ppc_regname_to_dw2regnum
extern int tc_ppc_regname_to_dw2regnum PARAMS ((const char *regname));

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
252b5132	1	/* tc-ppc.h -- Header file for tc-ppc.c.
09b935ac	2	Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
2132e3a3	3	2004, 2005 Free Software Foundation, Inc.
252b5132 RH	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 2, 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
4b4da160 NC	20	Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
4b4da160 NC	21	02110-1301, USA. */
252b5132 RH	22
	23	#define TC_PPC
	24
252b5132	25	struct fix;
252b5132 RH	26
	27	/* Set the endianness we are using. Default to big endian. */
	28	#ifndef TARGET_BYTES_BIG_ENDIAN
	29	#define TARGET_BYTES_BIG_ENDIAN 1
	30	#endif
	31
252b5132 RH	32	/* If OBJ_COFF is defined, and TE_PE is not defined, we are assembling
	33	XCOFF for AIX or PowerMac. If TE_PE is defined, we are assembling
	34	COFF for Windows NT. */
	35
	36	#ifdef OBJ_COFF
	37	#ifndef TE_PE
	38	#define OBJ_XCOFF
	39	#endif
	40	#endif
	41
	42	/* The target BFD architecture. */
	43	#define TARGET_ARCH (ppc_arch ())
7f6d05e8	44	#define TARGET_MACH (ppc_mach ())
252b5132	45	extern enum bfd_architecture ppc_arch PARAMS ((void));
7f6d05e8	46	extern unsigned long ppc_mach PARAMS ((void));
252b5132 RH	47
	48	/* Whether or not the target is big endian */
	49	extern int target_big_endian;
	50
	51	/* The target BFD format. */
7f6d05e8	52	#define TARGET_FORMAT (ppc_target_format ())
0baf16f2	53	extern char *ppc_target_format PARAMS ((void));
252b5132 RH	54
	55	/* Permit temporary numeric labels. */
	56	#define LOCAL_LABELS_FB 1
	57
	58	/* $ is used to refer to the current location. */
	59	#define DOLLAR_DOT
	60
	61	/* Strings do not use backslash escapes under COFF. */
	62	#ifdef OBJ_COFF
	63	#define NO_STRING_ESCAPES
	64	#endif
	65
	66	#ifdef OBJ_ELF
	67	#define DIFF_EXPR_OK /* foo-. gets turned into PC relative relocs */
	68	#endif
	69
	70	#if TARGET_BYTES_BIG_ENDIAN
	71	#define PPC_BIG_ENDIAN 1
	72	#else
	73	#define PPC_BIG_ENDIAN 0
	74	#endif
	75
	76	/* We don't need to handle .word strangely. */
	77	#define WORKING_DOT_WORD
	78
0baf16f2 AM	79	#define MAX_MEM_FOR_RS_ALIGN_CODE 4
	80	#define HANDLE_ALIGN(FRAGP) \
	81	if ((FRAGP)->fr_type == rs_align_code) \
	82	{ \
	83	valueT count = ((FRAGP)->fr_next->fr_address \
	84	- ((FRAGP)->fr_address + (FRAGP)->fr_fix)); \
	85	if (count != 0 && (count & 3) == 0) \
	86	{ \
2132e3a3	87	char *dest = (FRAGP)->fr_literal + (FRAGP)->fr_fix; \
0baf16f2 AM	88	\
	89	(FRAGP)->fr_var = 4; \
	90	if (target_big_endian) \
	91	{ \
	92	*dest++ = 0x60; \
	93	*dest++ = 0; \
	94	*dest++ = 0; \
	95	*dest++ = 0; \
	96	} \
	97	else \
	98	{ \
	99	*dest++ = 0; \
	100	*dest++ = 0; \
	101	*dest++ = 0; \
	102	*dest++ = 0x60; \
	103	} \
	104	} \
	105	}
	106
09b935ac AM	107	#define md_frag_check(FRAGP) \
	108	if ((FRAGP)->has_code \
	109	&& (((FRAGP)->fr_address + (FRAGP)->insn_addr) & 3) != 0) \
	110	as_bad_where ((FRAGP)->fr_file, (FRAGP)->fr_line, \
	111	_("instruction address is not a multiple of 4"));
252b5132 RH	112	\f
	113	#ifdef TE_PE
	114
	115	/* Question marks are permitted in symbol names. */
	116	#define LEX_QM 1
	117
	118	/* Don't adjust TOC relocs. */
a161fe53	119	#define tc_fix_adjustable(FIX) ppc_pe_fix_adjustable (FIX)
252b5132 RH	120	extern int ppc_pe_fix_adjustable PARAMS ((struct fix *));
	121
	122	#endif
	123
	124	#ifdef OBJ_XCOFF
	125
	126	/* Declarations needed when generating XCOFF code. XCOFF is an
	127	extension of COFF, used only on the RS/6000. Rather than create an
	128	obj-xcoff, we just use obj-coff, and handle the extensions here in
	129	tc-ppc. */
	130
	131	/* We need to keep some information for symbols. */
	132	struct ppc_tc_sy
	133	{
	134	/* We keep a few linked lists of symbols. */
49309057	135	symbolS *next;
252b5132 RH	136	/* Non-zero if the symbol should be output. The RS/6000 assembler
	137	only outputs symbols that are external or are mentioned in a
	138	.globl or .lglobl statement. */
	139	int output;
	140	/* The symbol class. */
	141	int class;
	142	/* The real name, if the symbol was renamed. */
	143	char *real_name;
	144	/* For a csect symbol, the subsegment we are using. This is zero
	145	for symbols that are not csects. */
	146	subsegT subseg;
	147	/* For a csect or common symbol, the alignment to use. */
	148	int align;
	149	/* For a function symbol, a symbol whose value is the size. The
	150	field is NULL if there is no size. */
49309057	151	symbolS *size;
252b5132 RH	152	/* For a csect symbol, the last symbol which has been defined in
	153	this csect, or NULL if none have been defined so far. For a .bs
	154	symbol, the referenced csect symbol. */
49309057	155	symbolS *within;
252b5132 RH	156	};
	157
	158	#define TC_SYMFIELD_TYPE struct ppc_tc_sy
	159
	160	/* We need an additional auxent for function symbols. */
	161	#define OBJ_COFF_MAX_AUXENTRIES 2
	162
	163	/* Square and curly brackets are permitted in symbol names. */
	164	#define LEX_BR 3
	165
	166	/* Canonicalize the symbol name. */
	167	#define tc_canonicalize_symbol_name(name) ppc_canonicalize_symbol_name (name)
	168	extern char ppc_canonicalize_symbol_name PARAMS ((char ));
	169
	170	/* Get the symbol class from the name. */
	171	#define tc_symbol_new_hook(sym) ppc_symbol_new_hook (sym)
49309057	172	extern void ppc_symbol_new_hook PARAMS ((symbolS *));
252b5132 RH	173
	174	/* Set the symbol class of a label based on the csect. */
	175	#define tc_frob_label(sym) ppc_frob_label (sym)
49309057	176	extern void ppc_frob_label PARAMS ((symbolS *));
252b5132 RH	177
252b5132 RH	178	/* TOC relocs requires special handling. */
a161fe53	179	#define tc_fix_adjustable(FIX) ppc_fix_adjustable (FIX)
252b5132 RH	180	extern int ppc_fix_adjustable PARAMS ((struct fix *));
252b5132 RH	181
252b5132 RH	182	/* We need to set the section VMA. */
	183	#define tc_frob_section(sec) ppc_frob_section (sec)
	184	extern void ppc_frob_section PARAMS ((asection *));
	185
	186	/* Finish up the symbol. */
	187	#define tc_frob_symbol(sym, punt) punt = ppc_frob_symbol (sym)
49309057	188	extern int ppc_frob_symbol PARAMS ((symbolS *));
252b5132 RH	189
	190	/* Finish up the entire symtab. */
	191	#define tc_adjust_symtab() ppc_adjust_symtab ()
	192	extern void ppc_adjust_symtab PARAMS ((void));
	193
2c1c4c62 GK	194	/* We also need to copy, in particular, the class of the symbol,
	195	over what obj-coff would otherwise have copied. */
	196	#define OBJ_COPY_SYMBOL_ATTRIBUTES(dest,src) \
	197	do { \
	198	if (SF_GET_GET_SEGMENT (dest)) \
	199	S_SET_SEGMENT (dest, S_GET_SEGMENT (src)); \
	200	symbol_get_tc (dest)->size = symbol_get_tc (src)->size; \
	201	symbol_get_tc (dest)->align = symbol_get_tc (src)->align; \
	202	symbol_get_tc (dest)->class = symbol_get_tc (src)->class; \
	203	symbol_get_tc (dest)->within = symbol_get_tc (src)->within; \
	204	} while (0)
	205
252b5132 RH	206	#endif /* OBJ_XCOFF */
252b5132 RH	207
5ce8663f NC	208	extern const char ppc_symbol_chars[];
	209	#define tc_symbol_chars ppc_symbol_chars
	210
252b5132 RH	211	#ifdef OBJ_ELF
252b5132 RH	212
252b5132 RH	213	/* Support for SHF_EXCLUDE and SHT_ORDERED */
252b5132 RH	214	extern int ppc_section_letter PARAMS ((int, char **));
9de8d8f1 RH	215	extern int ppc_section_type PARAMS ((char *, size_t));
9de8d8f1 RH	216	extern int ppc_section_word PARAMS ((char *, size_t));
252b5132 RH	217	extern int ppc_section_flags PARAMS ((int, int, int));
	218
	219	#define md_elf_section_letter(LETTER, PTR_MSG) ppc_section_letter (LETTER, PTR_MSG)
9de8d8f1 RH	220	#define md_elf_section_type(STR, LEN) ppc_section_type (STR, LEN)
9de8d8f1 RH	221	#define md_elf_section_word(STR, LEN) ppc_section_word (STR, LEN)
252b5132 RH	222	#define md_elf_section_flags(FLAGS, ATTR, TYPE) ppc_section_flags (FLAGS, ATTR, TYPE)
252b5132 RH	223
252b5132 RH	224	#define tc_comment_chars ppc_comment_chars
	225	extern const char *ppc_comment_chars;
	226
81d4177b	227	/* Keep relocations relative to the GOT, or non-PC relative. */
a161fe53	228	#define tc_fix_adjustable(FIX) ppc_fix_adjustable (FIX)
0baf16f2	229	extern int ppc_fix_adjustable PARAMS ((struct fix *));
252b5132	230
55cf6793	231	/* Values passed to md_apply_fix don't include symbol values. */
a161fe53	232	#define MD_APPLY_SYM_VALUE(FIX) 0
252b5132	233
7e8d4ab4 AM	234	#define tc_frob_file_before_adjust ppc_frob_file_before_adjust
7e8d4ab4 AM	235	extern void ppc_frob_file_before_adjust PARAMS ((void));
0baf16f2	236
252b5132 RH	237	#endif /* OBJ_ELF */
252b5132 RH	238
5f5c1f75	239	#if defined (OBJ_ELF) \|\| defined (OBJ_XCOFF)
a161fe53 AM	240	#define TC_FORCE_RELOCATION(FIX) ppc_force_relocation (FIX)
a161fe53 AM	241	extern int ppc_force_relocation PARAMS ((struct fix *));
5f5c1f75	242	#endif
a161fe53	243
252b5132	244	/* call md_pcrel_from_section, not md_pcrel_from */
a161fe53	245	#define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from_section(FIX, SEC)
252b5132 RH	246	extern long md_pcrel_from_section PARAMS ((struct fix *, segT));
252b5132 RH	247
9497f5ac	248	#define md_parse_name(name, exp, mode, c) ppc_parse_name (name, exp)
252b5132 RH	249	extern int ppc_parse_name PARAMS ((const char , struct expressionS ));
	250
	251	#define md_operand(x)
6a0c61b7 EZ	252
	253	#define md_cleanup() ppc_cleanup ()
	254	extern void ppc_cleanup PARAMS ((void));
75e21f08 JJ	255
	256	#define TARGET_USE_CFIPOP 1
	257
	258	#define tc_cfi_frame_initial_instructions ppc_cfi_frame_initial_instructions
	259	extern void ppc_cfi_frame_initial_instructions PARAMS ((void));
	260
	261	#define tc_regname_to_dw2regnum tc_ppc_regname_to_dw2regnum
	262	extern int tc_ppc_regname_to_dw2regnum PARAMS ((const char *regname));
	263
	264	extern int ppc_cie_data_alignment;
	265
	266	#define DWARF2_LINE_MIN_INSN_LENGTH 4
	267	#define DWARF2_DEFAULT_RETURN_COLUMN 0x41
	268	#define DWARF2_CIE_DATA_ALIGNMENT ppc_cie_data_alignment