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

/* This file is tc-arm.h
   Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
   2004 Free Software Foundation, Inc.
   Contributed by Richard Earnshaw (rwe@pegasus.esprit.ec.org)
	Modified by David Taylor (dtaylor@armltd.co.uk)

   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_ARM 1

#ifndef TARGET_BYTES_BIG_ENDIAN
#define TARGET_BYTES_BIG_ENDIAN 0
#endif

#define WORKING_DOT_WORD

#define COFF_MAGIC 	ARMMAGIC
#define TARGET_ARCH 	bfd_arch_arm

#define DIFF_EXPR_OK

#ifdef  LITTLE_ENDIAN
#undef  LITTLE_ENDIAN
#endif

#ifdef  BIG_ENDIAN
#undef  BIG_ENDIAN
#endif

#define LITTLE_ENDIAN 	1234
#define BIG_ENDIAN 	4321

struct fix;

#if defined OBJ_AOUT
# if defined TE_RISCIX
#  define TARGET_FORMAT "a.out-riscix"
# elif defined TE_LINUX
#  define ARM_BI_ENDIAN
#  define TARGET_FORMAT "a.out-arm-linux"
# elif defined TE_NetBSD
#  define TARGET_FORMAT "a.out-arm-netbsd"
# else
#  define ARM_BI_ENDIAN
#  define TARGET_FORMAT (target_big_endian ? "a.out-arm-big" : "a.out-arm-little")
# endif
#elif defined OBJ_AIF
# define TARGET_FORMAT "aif"
#elif defined OBJ_COFF
# define ARM_BI_ENDIAN
# if defined TE_PE
#  if defined TE_EPOC
#   define TARGET_FORMAT (target_big_endian ? "epoc-pe-arm-big" : "epoc-pe-arm-little")
#  else
#   define TARGET_FORMAT (target_big_endian ? "pe-arm-big" : "pe-arm-little")
#  endif
# else
#  define TARGET_FORMAT (target_big_endian ? "coff-arm-big" : "coff-arm-little")
# endif
#elif defined OBJ_ELF
# define ARM_BI_ENDIAN
# define TARGET_FORMAT	elf32_arm_target_format ()
#endif

#define TC_FORCE_RELOCATION(FIX) arm_force_relocation (FIX)

#define md_relax_frag(segment, fragp, stretch) \
  arm_relax_frag(segment, fragp, stretch)
extern int arm_relax_frag (asection *, struct frag *, long);

#define md_optimize_expr(l,o,r)		arm_optimize_expr (l, o, r)
extern int arm_optimize_expr (expressionS *, operatorT, expressionS *);

#define md_cleanup() arm_cleanup ()

#define md_start_line_hook() arm_start_line_hook ()

#define tc_frob_label(S) arm_frob_label (S)

/* We also need to mark assembler created symbols:  */
#define tc_frob_fake_label(S) arm_frob_label (S)

#ifdef OBJ_ELF
#define md_end arm_md_end
extern void arm_md_end (void);
#endif

/* NOTE: The fake label creation in stabs.c:s_stab_generic() has
   deliberately not been updated to mark assembler created stabs
   symbols as Thumb.  */

#define TC_FIX_TYPE int
#define TC_INIT_FIX_DATA(FIX) ((FIX)->tc_fix_data = 0)

/* We need to keep some local information on symbols.  */

#define TC_SYMFIELD_TYPE 	unsigned int
#define ARM_GET_FLAG(s)   	(*symbol_get_tc (s))
#define ARM_SET_FLAG(s,v) 	(*symbol_get_tc (s) |= (v))
#define ARM_RESET_FLAG(s,v) 	(*symbol_get_tc (s) &= ~(v))

#define ARM_FLAG_THUMB 		(1 << 0)	/* The symbol is a Thumb symbol rather than an Arm symbol.  */
#define ARM_FLAG_INTERWORK 	(1 << 1)	/* The symbol is attached to code that supports interworking.  */
#define THUMB_FLAG_FUNC		(1 << 2)	/* The symbol is attached to the start of a Thumb function.  */

#define ARM_IS_THUMB(s)		(ARM_GET_FLAG (s) & ARM_FLAG_THUMB)
#define ARM_IS_INTERWORK(s)	(ARM_GET_FLAG (s) & ARM_FLAG_INTERWORK)
#define THUMB_IS_FUNC(s)	(ARM_GET_FLAG (s) & THUMB_FLAG_FUNC)

#define ARM_SET_THUMB(s,t)      ((t) ? ARM_SET_FLAG (s, ARM_FLAG_THUMB)     : ARM_RESET_FLAG (s, ARM_FLAG_THUMB))
#define ARM_SET_INTERWORK(s,t)  ((t) ? ARM_SET_FLAG (s, ARM_FLAG_INTERWORK) : ARM_RESET_FLAG (s, ARM_FLAG_INTERWORK))
#define THUMB_SET_FUNC(s,t)     ((t) ? ARM_SET_FLAG (s, THUMB_FLAG_FUNC)    : ARM_RESET_FLAG (s, THUMB_FLAG_FUNC))

#define TC_START_LABEL(C,STR)            (c == ':' || (c == '/' && arm_data_in_code ()))
#define tc_canonicalize_symbol_name(str) arm_canonicalize_symbol_name (str);
#define obj_adjust_symtab() 		 arm_adjust_symtab ()

#define LISTING_HEADER "ARM GAS "

#define OPTIONAL_REGISTER_PREFIX '%'

#define LOCAL_LABEL(name)  (name[0] == '.' && name[1] == 'L')
#define LOCAL_LABELS_FB    1

/* This expression evaluates to true if the relocation is for a local
   object for which we still want to do the relocation at runtime.
   False if we are willing to perform this relocation while building
   the .o file.  GOTOFF does not need to be checked here because it is
   not pcrel.  I am not sure if some of the others are ever used with
   pcrel, but it is easier to be safe than sorry.  */

#define TC_FORCE_RELOCATION_LOCAL(FIX)			\
  (!(FIX)->fx_pcrel					\
   || (FIX)->fx_plt					\
   || (FIX)->fx_r_type == BFD_RELOC_ARM_GOT32		\
   || (FIX)->fx_r_type == BFD_RELOC_32			\
   || TC_FORCE_RELOCATION (FIX))

/* Force output of R_ARM_REL32 relocations against thumb function symbols.
   This is needed to ensure the low bit is handled correctly.  */
#define TC_FORCE_RELOCATION_SUB_SAME(FIX, SEG)	\
  (THUMB_IS_FUNC ((FIX)->fx_addsy)		\
   || !SEG_NORMAL (SEG))

#define TC_CONS_FIX_NEW cons_fix_new_arm

#define MAX_MEM_FOR_RS_ALIGN_CODE 31

/* For frags in code sections we need to record whether they contain
   ARM code or THUMB code.  This is that if they have to be aligned,
   they can contain the correct type of no-op instruction.  */
#define TC_FRAG_TYPE		int
#define TC_FRAG_INIT(fragp)	arm_init_frag (fragp)
#define HANDLE_ALIGN(fragp)	arm_handle_align (fragp)

#define md_do_align(N, FILL, LEN, MAX, LABEL)					\
  if (FILL == NULL && (N) != 0 && ! need_pass_2 && subseg_text_p (now_seg))	\
    {										\
      arm_frag_align_code (N, MAX);						\
      goto LABEL;								\
    }

#ifdef OBJ_ELF
# define DWARF2_LINE_MIN_INSN_LENGTH 	2
# define obj_frob_symbol(sym, punt)	armelf_frob_symbol ((sym), & (punt))
# define md_elf_section_change_hook()	arm_elf_change_section ()
# define md_elf_section_type(str, len)	arm_elf_section_type (str, len)
# define GLOBAL_OFFSET_TABLE_NAME	"_GLOBAL_OFFSET_TABLE_"
# define TC_SEGMENT_INFO_TYPE 		struct arm_segment_info_type

enum mstate
{
  MAP_UNDEFINED = 0, /* Must be zero, for seginfo in new sections.  */
  MAP_DATA,
  MAP_ARM,
  MAP_THUMB
};

struct arm_segment_info_type
{
  enum mstate mapstate;
  unsigned int marked_pr_dependency;
};

/* We want .cfi_* pseudo-ops for generating unwind info.  */
#define TARGET_USE_CFIPOP              1

/* The lr register is r14.  */
#define DWARF2_DEFAULT_RETURN_COLUMN  14

/* Registers are generally saved at negative offsets to the CFA.  */
#define DWARF2_CIE_DATA_ALIGNMENT     -4

/* CFI hooks.  */
#define tc_regname_to_dw2regnum            tc_arm_regname_to_dw2regnum
#define tc_cfi_frame_initial_instructions  tc_arm_frame_initial_instructions

#else /* Not OBJ_ELF.  */
#define GLOBAL_OFFSET_TABLE_NAME "__GLOBAL_OFFSET_TABLE_"
#endif

#if defined OBJ_ELF || defined OBJ_COFF

# define EXTERN_FORCE_RELOC 			1
# define tc_fix_adjustable(FIX) 		arm_fix_adjustable (FIX)
/* Values passed to md_apply_fix don't include the symbol value.  */
# define MD_APPLY_SYM_VALUE(FIX) 		0
# define TC_VALIDATE_FIX(FIX, SEGTYPE, LABEL)	arm_validate_fix (FIX)

#endif

#define MD_PCREL_FROM_SECTION(F,S) md_pcrel_from_section(F,S)

extern long md_pcrel_from_section (struct fix *, segT);
extern void arm_frag_align_code (int, int);
extern void arm_validate_fix (struct fix *);
extern const char * elf32_arm_target_format (void);
extern void arm_elf_change_section (void);
extern int arm_force_relocation (struct fix *);
extern void arm_cleanup (void);
extern void arm_start_line_hook (void);
extern void arm_frob_label (symbolS *);
extern int arm_data_in_code (void);
extern char * arm_canonicalize_symbol_name (char *);
extern void arm_adjust_symtab (void);
extern void armelf_frob_symbol (symbolS *, int *);
extern void cons_fix_new_arm (fragS *, int, int, expressionS *);
extern void arm_init_frag (struct frag *);
extern void arm_handle_align (struct frag *);
extern bfd_boolean arm_fix_adjustable (struct fix *);
extern int arm_elf_section_type (const char *, size_t);
extern int tc_arm_regname_to_dw2regnum (const char *regname);
extern void tc_arm_frame_initial_instructions (void);
Commit	Line	Data
252b5132	1	/* This file is tc-arm.h
aef6203b AM	2	Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
aef6203b AM	3	2004 Free Software Foundation, Inc.
252b5132 RH	4	Contributed by Richard Earnshaw (rwe@pegasus.esprit.ec.org)
	5	Modified by David Taylor (dtaylor@armltd.co.uk)
	6
	7	This file is part of GAS, the GNU Assembler.
	8
	9	GAS is free software; you can redistribute it and/or modify
	10	it under the terms of the GNU General Public License as published by
	11	the Free Software Foundation; either version 2, or (at your option)
	12	any later version.
	13
	14	GAS is distributed in the hope that it will be useful,
	15	but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	GNU General Public License for more details.
	18
	19	You should have received a copy of the GNU General Public License
	20	along with GAS; see the file COPYING. If not, write to the Free
4b4da160 NC	21	Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
4b4da160 NC	22	02110-1301, USA. */
252b5132 RH	23
	24	#define TC_ARM 1
	25
	26	#ifndef TARGET_BYTES_BIG_ENDIAN
	27	#define TARGET_BYTES_BIG_ENDIAN 0
	28	#endif
	29
	30	#define WORKING_DOT_WORD
	31
	32	#define COFF_MAGIC ARMMAGIC
	33	#define TARGET_ARCH bfd_arch_arm
	34
252b5132 RH	35	#define DIFF_EXPR_OK
	36
	37	#ifdef LITTLE_ENDIAN
	38	#undef LITTLE_ENDIAN
	39	#endif
	40
	41	#ifdef BIG_ENDIAN
	42	#undef BIG_ENDIAN
	43	#endif
	44
	45	#define LITTLE_ENDIAN 1234
	46	#define BIG_ENDIAN 4321
	47
a161fe53 AM	48	struct fix;
a161fe53 AM	49
69b97547 NC	50	#if defined OBJ_AOUT
	51	# if defined TE_RISCIX
	52	# define TARGET_FORMAT "a.out-riscix"
	53	# elif defined TE_LINUX
	54	# define ARM_BI_ENDIAN
	55	# define TARGET_FORMAT "a.out-arm-linux"
	56	# elif defined TE_NetBSD
	57	# define TARGET_FORMAT "a.out-arm-netbsd"
	58	# else
	59	# define ARM_BI_ENDIAN
	60	# define TARGET_FORMAT (target_big_endian ? "a.out-arm-big" : "a.out-arm-little")
	61	# endif
	62	#elif defined OBJ_AIF
	63	# define TARGET_FORMAT "aif"
	64	#elif defined OBJ_COFF
252b5132	65	# define ARM_BI_ENDIAN
252b5132	66	# if defined TE_PE
69b97547 NC	67	# if defined TE_EPOC
	68	# define TARGET_FORMAT (target_big_endian ? "epoc-pe-arm-big" : "epoc-pe-arm-little")
	69	# else
	70	# define TARGET_FORMAT (target_big_endian ? "pe-arm-big" : "pe-arm-little")
	71	# endif
252b5132 RH	72	# else
	73	# define TARGET_FORMAT (target_big_endian ? "coff-arm-big" : "coff-arm-little")
	74	# endif
69b97547 NC	75	#elif defined OBJ_ELF
	76	# define ARM_BI_ENDIAN
	77	# define TARGET_FORMAT elf32_arm_target_format ()
252b5132 RH	78	#endif
252b5132 RH	79
114424c6	80	#define TC_FORCE_RELOCATION(FIX) arm_force_relocation (FIX)
114424c6	81
0110f2b8 PB	82	#define md_relax_frag(segment, fragp, stretch) \
	83	arm_relax_frag(segment, fragp, stretch)
	84	extern int arm_relax_frag (asection , struct frag , long);
252b5132	85
a8bc6c78 PB	86	#define md_optimize_expr(l,o,r) arm_optimize_expr (l, o, r)
	87	extern int arm_optimize_expr (expressionS , operatorT, expressionS );
	88
252b5132	89	#define md_cleanup() arm_cleanup ()
252b5132 RH	90
252b5132 RH	91	#define md_start_line_hook() arm_start_line_hook ()
252b5132 RH	92
252b5132 RH	93	#define tc_frob_label(S) arm_frob_label (S)
252b5132 RH	94
	95	/* We also need to mark assembler created symbols: */
	96	#define tc_frob_fake_label(S) arm_frob_label (S)
	97
ee065d83 PB	98	#ifdef OBJ_ELF
	99	#define md_end arm_md_end
	100	extern void arm_md_end (void);
	101	#endif
	102
252b5132 RH	103	/* NOTE: The fake label creation in stabs.c:s_stab_generic() has
	104	deliberately not been updated to mark assembler created stabs
	105	symbols as Thumb. */
	106
adbaf948 ZW	107	#define TC_FIX_TYPE int
adbaf948 ZW	108	#define TC_INIT_FIX_DATA(FIX) ((FIX)->tc_fix_data = 0)
29c4c6b5	109
252b5132 RH	110	/* We need to keep some local information on symbols. */
252b5132 RH	111
69b97547	112	#define TC_SYMFIELD_TYPE unsigned int
174419c1 ILT	113	#define ARM_GET_FLAG(s) (*symbol_get_tc (s))
	114	#define ARM_SET_FLAG(s,v) (*symbol_get_tc (s) \|= (v))
	115	#define ARM_RESET_FLAG(s,v) (*symbol_get_tc (s) &= ~(v))
252b5132 RH	116
252b5132 RH	117	#define ARM_FLAG_THUMB (1 << 0) /* The symbol is a Thumb symbol rather than an Arm symbol. */
2d2255b5	118	#define ARM_FLAG_INTERWORK (1 << 1) /* The symbol is attached to code that supports interworking. */
252b5132 RH	119	#define THUMB_FLAG_FUNC (1 << 2) /* The symbol is attached to the start of a Thumb function. */
	120
	121	#define ARM_IS_THUMB(s) (ARM_GET_FLAG (s) & ARM_FLAG_THUMB)
	122	#define ARM_IS_INTERWORK(s) (ARM_GET_FLAG (s) & ARM_FLAG_INTERWORK)
	123	#define THUMB_IS_FUNC(s) (ARM_GET_FLAG (s) & THUMB_FLAG_FUNC)
	124
	125	#define ARM_SET_THUMB(s,t) ((t) ? ARM_SET_FLAG (s, ARM_FLAG_THUMB) : ARM_RESET_FLAG (s, ARM_FLAG_THUMB))
	126	#define ARM_SET_INTERWORK(s,t) ((t) ? ARM_SET_FLAG (s, ARM_FLAG_INTERWORK) : ARM_RESET_FLAG (s, ARM_FLAG_INTERWORK))
	127	#define THUMB_SET_FUNC(s,t) ((t) ? ARM_SET_FLAG (s, THUMB_FLAG_FUNC) : ARM_RESET_FLAG (s, THUMB_FLAG_FUNC))
	128
69b97547 NC	129	#define TC_START_LABEL(C,STR) (c == ':' \|\| (c == '/' && arm_data_in_code ()))
	130	#define tc_canonicalize_symbol_name(str) arm_canonicalize_symbol_name (str);
	131	#define obj_adjust_symtab() arm_adjust_symtab ()
252b5132 RH	132
	133	#define LISTING_HEADER "ARM GAS "
	134
	135	#define OPTIONAL_REGISTER_PREFIX '%'
	136
37f6032b ZW	137	#define LOCAL_LABEL(name) (name[0] == '.' && name[1] == 'L')
37f6032b ZW	138	#define LOCAL_LABELS_FB 1
252b5132	139
a161fe53 AM	140	/* This expression evaluates to true if the relocation is for a local
	141	object for which we still want to do the relocation at runtime.
	142	False if we are willing to perform this relocation while building
	143	the .o file. GOTOFF does not need to be checked here because it is
	144	not pcrel. I am not sure if some of the others are ever used with
252b5132 RH	145	pcrel, but it is easier to be safe than sorry. */
252b5132 RH	146
a161fe53 AM	147	#define TC_FORCE_RELOCATION_LOCAL(FIX) \
	148	(!(FIX)->fx_pcrel \
	149	\|\| (FIX)->fx_plt \
a161fe53 AM	150	\|\| (FIX)->fx_r_type == BFD_RELOC_ARM_GOT32 \
	151	\|\| (FIX)->fx_r_type == BFD_RELOC_32 \
	152	\|\| TC_FORCE_RELOCATION (FIX))
252b5132	153
a8bc6c78 PB	154	/* Force output of R_ARM_REL32 relocations against thumb function symbols.
	155	This is needed to ensure the low bit is handled correctly. */
	156	#define TC_FORCE_RELOCATION_SUB_SAME(FIX, SEG) \
	157	(THUMB_IS_FUNC ((FIX)->fx_addsy) \
	158	\|\| !SEG_NORMAL (SEG))
	159
252b5132	160	#define TC_CONS_FIX_NEW cons_fix_new_arm
16a0c2d4	161
d8708f40 NC	162	#define MAX_MEM_FOR_RS_ALIGN_CODE 31
d8708f40 NC	163
16a0c2d4 NC	164	/* For frags in code sections we need to record whether they contain
	165	ARM code or THUMB code. This is that if they have to be aligned,
	166	they can contain the correct type of no-op instruction. */
69b97547	167	#define TC_FRAG_TYPE int
16a0c2d4	168	#define TC_FRAG_INIT(fragp) arm_init_frag (fragp)
69b97547	169	#define HANDLE_ALIGN(fragp) arm_handle_align (fragp)
16a0c2d4 NC	170
	171	#define md_do_align(N, FILL, LEN, MAX, LABEL) \
	172	if (FILL == NULL && (N) != 0 && ! need_pass_2 && subseg_text_p (now_seg)) \
	173	{ \
	174	arm_frag_align_code (N, MAX); \
	175	goto LABEL; \
	176	}
69b97547 NC	177
	178	#ifdef OBJ_ELF
	179	# define DWARF2_LINE_MIN_INSN_LENGTH 2
	180	# define obj_frob_symbol(sym, punt) armelf_frob_symbol ((sym), & (punt))
	181	# define md_elf_section_change_hook() arm_elf_change_section ()
40a18ebd	182	# define md_elf_section_type(str, len) arm_elf_section_type (str, len)
69b97547	183	# define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
84798bd6	184	# define TC_SEGMENT_INFO_TYPE struct arm_segment_info_type
69b97547 NC	185
	186	enum mstate
	187	{
	188	MAP_UNDEFINED = 0, /* Must be zero, for seginfo in new sections. */
	189	MAP_DATA,
	190	MAP_ARM,
	191	MAP_THUMB
	192	};
	193
84798bd6 JB	194	struct arm_segment_info_type
	195	{
	196	enum mstate mapstate;
	197	unsigned int marked_pr_dependency;
	198	};
	199
a394c00f NC	200	/* We want .cfi_* pseudo-ops for generating unwind info. */
	201	#define TARGET_USE_CFIPOP 1
	202
	203	/* The lr register is r14. */
	204	#define DWARF2_DEFAULT_RETURN_COLUMN 14
	205
	206	/* Registers are generally saved at negative offsets to the CFA. */
	207	#define DWARF2_CIE_DATA_ALIGNMENT -4
	208
	209	/* CFI hooks. */
	210	#define tc_regname_to_dw2regnum tc_arm_regname_to_dw2regnum
	211	#define tc_cfi_frame_initial_instructions tc_arm_frame_initial_instructions
	212
69b97547 NC	213	#else /* Not OBJ_ELF. */
	214	#define GLOBAL_OFFSET_TABLE_NAME "__GLOBAL_OFFSET_TABLE_"
	215	#endif
	216
	217	#if defined OBJ_ELF \|\| defined OBJ_COFF
	218
	219	# define EXTERN_FORCE_RELOC 1
	220	# define tc_fix_adjustable(FIX) arm_fix_adjustable (FIX)
55cf6793	221	/* Values passed to md_apply_fix don't include the symbol value. */
69b97547 NC	222	# define MD_APPLY_SYM_VALUE(FIX) 0
	223	# define TC_VALIDATE_FIX(FIX, SEGTYPE, LABEL) arm_validate_fix (FIX)
	224
	225	#endif
	226
2fc8bdac ZW	227	#define MD_PCREL_FROM_SECTION(F,S) md_pcrel_from_section(F,S)
	228
	229	extern long md_pcrel_from_section (struct fix *, segT);
69b97547 NC	230	extern void arm_frag_align_code (int, int);
	231	extern void arm_validate_fix (struct fix *);
	232	extern const char * elf32_arm_target_format (void);
	233	extern void arm_elf_change_section (void);
	234	extern int arm_force_relocation (struct fix *);
	235	extern void arm_cleanup (void);
	236	extern void arm_start_line_hook (void);
	237	extern void arm_frob_label (symbolS *);
	238	extern int arm_data_in_code (void);
	239	extern char * arm_canonicalize_symbol_name (char *);
	240	extern void arm_adjust_symtab (void);
	241	extern void armelf_frob_symbol (symbolS , int );
	242	extern void cons_fix_new_arm (fragS , int, int, expressionS );
	243	extern void arm_init_frag (struct frag *);
	244	extern void arm_handle_align (struct frag *);
	245	extern bfd_boolean arm_fix_adjustable (struct fix *);
40a18ebd	246	extern int arm_elf_section_type (const char *, size_t);
a394c00f NC	247	extern int tc_arm_regname_to_dw2regnum (const char *regname);
a394c00f NC	248	extern void tc_arm_frame_initial_instructions (void);