[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

#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 ())
#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, 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
	32	#ifndef BFD_ASSEMBLER
	33	#error PowerPC support requires BFD_ASSEMBLER
	34	#endif
	35
	36	/* If OBJ_COFF is defined, and TE_PE is not defined, we are assembling
	37	XCOFF for AIX or PowerMac. If TE_PE is defined, we are assembling
	38	COFF for Windows NT. */
	39
	40	#ifdef OBJ_COFF
	41	#ifndef TE_PE
	42	#define OBJ_XCOFF
	43	#endif
	44	#endif
	45
	46	/* The target BFD architecture. */
	47	#define TARGET_ARCH (ppc_arch ())
7f6d05e8	48	#define TARGET_MACH (ppc_mach ())
252b5132	49	extern enum bfd_architecture ppc_arch PARAMS ((void));
7f6d05e8	50	extern unsigned long ppc_mach PARAMS ((void));
252b5132 RH	51
	52	/* Whether or not the target is big endian */
	53	extern int target_big_endian;
	54
	55	/* The target BFD format. */
7f6d05e8	56	#define TARGET_FORMAT (ppc_target_format ())
0baf16f2	57	extern char *ppc_target_format PARAMS ((void));
252b5132 RH	58
	59	/* Permit temporary numeric labels. */
	60	#define LOCAL_LABELS_FB 1
	61
	62	/* $ is used to refer to the current location. */
	63	#define DOLLAR_DOT
	64
	65	/* Strings do not use backslash escapes under COFF. */
	66	#ifdef OBJ_COFF
	67	#define NO_STRING_ESCAPES
	68	#endif
	69
	70	#ifdef OBJ_ELF
	71	#define DIFF_EXPR_OK /* foo-. gets turned into PC relative relocs */
	72	#endif
	73
	74	#if TARGET_BYTES_BIG_ENDIAN
	75	#define PPC_BIG_ENDIAN 1
	76	#else
	77	#define PPC_BIG_ENDIAN 0
	78	#endif
	79
	80	/* We don't need to handle .word strangely. */
	81	#define WORKING_DOT_WORD
	82
0baf16f2 AM	83	#define MAX_MEM_FOR_RS_ALIGN_CODE 4
	84	#define HANDLE_ALIGN(FRAGP) \
	85	if ((FRAGP)->fr_type == rs_align_code) \
	86	{ \
	87	valueT count = ((FRAGP)->fr_next->fr_address \
	88	- ((FRAGP)->fr_address + (FRAGP)->fr_fix)); \
	89	if (count != 0 && (count & 3) == 0) \
	90	{ \
2132e3a3	91	char *dest = (FRAGP)->fr_literal + (FRAGP)->fr_fix; \
0baf16f2 AM	92	\
	93	(FRAGP)->fr_var = 4; \
	94	if (target_big_endian) \
	95	{ \
	96	*dest++ = 0x60; \
	97	*dest++ = 0; \
	98	*dest++ = 0; \
	99	*dest++ = 0; \
	100	} \
	101	else \
	102	{ \
	103	*dest++ = 0; \
	104	*dest++ = 0; \
	105	*dest++ = 0; \
	106	*dest++ = 0x60; \
	107	} \
	108	} \
	109	}
	110
09b935ac AM	111	#define md_frag_check(FRAGP) \
	112	if ((FRAGP)->has_code \
	113	&& (((FRAGP)->fr_address + (FRAGP)->insn_addr) & 3) != 0) \
	114	as_bad_where ((FRAGP)->fr_file, (FRAGP)->fr_line, \
	115	_("instruction address is not a multiple of 4"));
252b5132 RH	116	\f
	117	#ifdef TE_PE
	118
	119	/* Question marks are permitted in symbol names. */
	120	#define LEX_QM 1
	121
	122	/* Don't adjust TOC relocs. */
a161fe53	123	#define tc_fix_adjustable(FIX) ppc_pe_fix_adjustable (FIX)
252b5132 RH	124	extern int ppc_pe_fix_adjustable PARAMS ((struct fix *));
	125
	126	#endif
	127
	128	#ifdef OBJ_XCOFF
	129
	130	/* Declarations needed when generating XCOFF code. XCOFF is an
	131	extension of COFF, used only on the RS/6000. Rather than create an
	132	obj-xcoff, we just use obj-coff, and handle the extensions here in
	133	tc-ppc. */
	134
	135	/* We need to keep some information for symbols. */
	136	struct ppc_tc_sy
	137	{
	138	/* We keep a few linked lists of symbols. */
49309057	139	symbolS *next;
252b5132 RH	140	/* Non-zero if the symbol should be output. The RS/6000 assembler
	141	only outputs symbols that are external or are mentioned in a
	142	.globl or .lglobl statement. */
	143	int output;
	144	/* The symbol class. */
	145	int class;
	146	/* The real name, if the symbol was renamed. */
	147	char *real_name;
	148	/* For a csect symbol, the subsegment we are using. This is zero
	149	for symbols that are not csects. */
	150	subsegT subseg;
	151	/* For a csect or common symbol, the alignment to use. */
	152	int align;
	153	/* For a function symbol, a symbol whose value is the size. The
	154	field is NULL if there is no size. */
49309057	155	symbolS *size;
252b5132 RH	156	/* For a csect symbol, the last symbol which has been defined in
	157	this csect, or NULL if none have been defined so far. For a .bs
	158	symbol, the referenced csect symbol. */
49309057	159	symbolS *within;
252b5132 RH	160	};
	161
	162	#define TC_SYMFIELD_TYPE struct ppc_tc_sy
	163
	164	/* We need an additional auxent for function symbols. */
	165	#define OBJ_COFF_MAX_AUXENTRIES 2
	166
	167	/* Square and curly brackets are permitted in symbol names. */
	168	#define LEX_BR 3
	169
	170	/* Canonicalize the symbol name. */
	171	#define tc_canonicalize_symbol_name(name) ppc_canonicalize_symbol_name (name)
	172	extern char ppc_canonicalize_symbol_name PARAMS ((char ));
	173
	174	/* Get the symbol class from the name. */
	175	#define tc_symbol_new_hook(sym) ppc_symbol_new_hook (sym)
49309057	176	extern void ppc_symbol_new_hook PARAMS ((symbolS *));
252b5132 RH	177
	178	/* Set the symbol class of a label based on the csect. */
	179	#define tc_frob_label(sym) ppc_frob_label (sym)
49309057	180	extern void ppc_frob_label PARAMS ((symbolS *));
252b5132 RH	181
252b5132 RH	182	/* TOC relocs requires special handling. */
a161fe53	183	#define tc_fix_adjustable(FIX) ppc_fix_adjustable (FIX)
252b5132 RH	184	extern int ppc_fix_adjustable PARAMS ((struct fix *));
252b5132 RH	185
252b5132 RH	186	/* We need to set the section VMA. */
	187	#define tc_frob_section(sec) ppc_frob_section (sec)
	188	extern void ppc_frob_section PARAMS ((asection *));
	189
	190	/* Finish up the symbol. */
	191	#define tc_frob_symbol(sym, punt) punt = ppc_frob_symbol (sym)
49309057	192	extern int ppc_frob_symbol PARAMS ((symbolS *));
252b5132 RH	193
	194	/* Finish up the entire symtab. */
	195	#define tc_adjust_symtab() ppc_adjust_symtab ()
	196	extern void ppc_adjust_symtab PARAMS ((void));
	197
2c1c4c62 GK	198	/* We also need to copy, in particular, the class of the symbol,
	199	over what obj-coff would otherwise have copied. */
	200	#define OBJ_COPY_SYMBOL_ATTRIBUTES(dest,src) \
	201	do { \
	202	if (SF_GET_GET_SEGMENT (dest)) \
	203	S_SET_SEGMENT (dest, S_GET_SEGMENT (src)); \
	204	symbol_get_tc (dest)->size = symbol_get_tc (src)->size; \
	205	symbol_get_tc (dest)->align = symbol_get_tc (src)->align; \
	206	symbol_get_tc (dest)->class = symbol_get_tc (src)->class; \
	207	symbol_get_tc (dest)->within = symbol_get_tc (src)->within; \
	208	} while (0)
	209
252b5132 RH	210	#endif /* OBJ_XCOFF */
252b5132 RH	211
5ce8663f NC	212	extern const char ppc_symbol_chars[];
	213	#define tc_symbol_chars ppc_symbol_chars
	214
252b5132 RH	215	#ifdef OBJ_ELF
252b5132 RH	216
252b5132 RH	217	/* Support for SHF_EXCLUDE and SHT_ORDERED */
252b5132 RH	218	extern int ppc_section_letter PARAMS ((int, char **));
9de8d8f1 RH	219	extern int ppc_section_type PARAMS ((char *, size_t));
9de8d8f1 RH	220	extern int ppc_section_word PARAMS ((char *, size_t));
252b5132 RH	221	extern int ppc_section_flags PARAMS ((int, int, int));
	222
	223	#define md_elf_section_letter(LETTER, PTR_MSG) ppc_section_letter (LETTER, PTR_MSG)
9de8d8f1 RH	224	#define md_elf_section_type(STR, LEN) ppc_section_type (STR, LEN)
9de8d8f1 RH	225	#define md_elf_section_word(STR, LEN) ppc_section_word (STR, LEN)
252b5132 RH	226	#define md_elf_section_flags(FLAGS, ATTR, TYPE) ppc_section_flags (FLAGS, ATTR, TYPE)
252b5132 RH	227
252b5132 RH	228	#define tc_comment_chars ppc_comment_chars
	229	extern const char *ppc_comment_chars;
	230
81d4177b	231	/* Keep relocations relative to the GOT, or non-PC relative. */
a161fe53	232	#define tc_fix_adjustable(FIX) ppc_fix_adjustable (FIX)
0baf16f2	233	extern int ppc_fix_adjustable PARAMS ((struct fix *));
252b5132	234
55cf6793	235	/* Values passed to md_apply_fix don't include symbol values. */
a161fe53	236	#define MD_APPLY_SYM_VALUE(FIX) 0
252b5132	237
7e8d4ab4 AM	238	#define tc_frob_file_before_adjust ppc_frob_file_before_adjust
7e8d4ab4 AM	239	extern void ppc_frob_file_before_adjust PARAMS ((void));
0baf16f2	240
252b5132 RH	241	#endif /* OBJ_ELF */
252b5132 RH	242
5f5c1f75	243	#if defined (OBJ_ELF) \|\| defined (OBJ_XCOFF)
a161fe53 AM	244	#define TC_FORCE_RELOCATION(FIX) ppc_force_relocation (FIX)
a161fe53 AM	245	extern int ppc_force_relocation PARAMS ((struct fix *));
5f5c1f75	246	#endif
a161fe53	247
252b5132	248	/* call md_pcrel_from_section, not md_pcrel_from */
a161fe53	249	#define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from_section(FIX, SEC)
252b5132 RH	250	extern long md_pcrel_from_section PARAMS ((struct fix *, segT));
252b5132 RH	251
a8a22e33	252	#define md_parse_name(name, exp, c) ppc_parse_name (name, exp)
252b5132 RH	253	extern int ppc_parse_name PARAMS ((const char , struct expressionS ));
	254
	255	#define md_operand(x)
6a0c61b7 EZ	256
	257	#define md_cleanup() ppc_cleanup ()
	258	extern void ppc_cleanup PARAMS ((void));
75e21f08 JJ	259
	260	#define TARGET_USE_CFIPOP 1
	261
	262	#define tc_cfi_frame_initial_instructions ppc_cfi_frame_initial_instructions
	263	extern void ppc_cfi_frame_initial_instructions PARAMS ((void));
	264
	265	#define tc_regname_to_dw2regnum tc_ppc_regname_to_dw2regnum
	266	extern int tc_ppc_regname_to_dw2regnum PARAMS ((const char *regname));
	267
	268	extern int ppc_cie_data_alignment;
	269
	270	#define DWARF2_LINE_MIN_INSN_LENGTH 4
	271	#define DWARF2_DEFAULT_RETURN_COLUMN 0x41
	272	#define DWARF2_CIE_DATA_ALIGNMENT ppc_cie_data_alignment