308 lines
10 KiB
C
308 lines
10 KiB
C
/* This file is tc-arm.h
|
|
Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
|
|
2004, 2005, 2006, 2007, 2008, 2009 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 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_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")
|
|
# elif defined TE_WINCE
|
|
# define TARGET_FORMAT (target_big_endian ? "pe-arm-wince-big" : "pe-arm-wince-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);
|
|
bfd_boolean arm_is_eabi (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)
|
|
#ifdef OBJ_ELF
|
|
|
|
/* For ELF objects THUMB_IS_FUNC is inferred from
|
|
ARM_IS_THUMB and the function type. */
|
|
#define THUMB_IS_FUNC(s) \
|
|
((arm_is_eabi () \
|
|
&& (ARM_IS_THUMB (s)) \
|
|
&& (symbol_get_bfdsym (s)->flags & BSF_FUNCTION)) \
|
|
|| (ARM_GET_FLAG (s) & THUMB_FLAG_FUNC))
|
|
|
|
#define ARM_IS_FUNC(s) \
|
|
((arm_is_eabi () \
|
|
&& !(ARM_IS_THUMB (s)) \
|
|
/* && !(THUMB_FLAG_FUNC & ARM_GET_FLAG (s)) \ */ \
|
|
&& (symbol_get_bfdsym (s)->flags & BSF_FUNCTION)))
|
|
|
|
|
|
#else
|
|
#define THUMB_IS_FUNC(s) (ARM_GET_FLAG (s) & THUMB_FLAG_FUNC)
|
|
#define ARM_IS_FUNC(s) (!THUMB_IS_FUNC (s) \
|
|
&& (symbol_get_bfdsym (s)->flags & BSF_FUNCTION))
|
|
#endif
|
|
|
|
#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))
|
|
|
|
void arm_copy_symbol_attributes (symbolS *, symbolS *);
|
|
#ifndef TC_COPY_SYMBOL_ATTRIBUTES
|
|
#define TC_COPY_SYMBOL_ATTRIBUTES(DEST, SRC) \
|
|
(arm_copy_symbol_attributes (DEST, SRC))
|
|
#endif
|
|
|
|
#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_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; \
|
|
}
|
|
|
|
#define DWARF2_LINE_MIN_INSN_LENGTH 2
|
|
|
|
/* 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)
|
|
|
|
#ifdef OBJ_ELF
|
|
# 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
|
|
|
|
/* This is not really an alignment operation, but it's something we
|
|
need to do at the same time: whenever we are figuring out the
|
|
alignment for data, we should check whether a $d symbol is
|
|
necessary. */
|
|
# define md_cons_align(nbytes) mapping_state (MAP_DATA)
|
|
|
|
enum mstate
|
|
{
|
|
MAP_UNDEFINED = 0, /* Must be zero, for seginfo in new sections. */
|
|
MAP_DATA,
|
|
MAP_ARM,
|
|
MAP_THUMB
|
|
};
|
|
|
|
void mapping_state (enum mstate);
|
|
|
|
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
|
|
|
|
/* 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)
|
|
#endif
|
|
|
|
#ifdef OBJ_ELF
|
|
/* Values passed to md_apply_fix don't include the symbol value. */
|
|
# define MD_APPLY_SYM_VALUE(FIX) arm_apply_sym_value (FIX)
|
|
#endif
|
|
|
|
#ifdef OBJ_COFF
|
|
# define TC_VALIDATE_FIX(FIX, SEGTYPE, LABEL) arm_validate_fix (FIX)
|
|
/* Values passed to md_apply_fix don't include the symbol value. */
|
|
# define MD_APPLY_SYM_VALUE(FIX) 0
|
|
#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 (char *regname);
|
|
extern void tc_arm_frame_initial_instructions (void);
|
|
|
|
#ifdef TE_PE
|
|
|
|
#define O_secrel O_md1
|
|
|
|
#define TC_DWARF2_EMIT_OFFSET tc_pe_dwarf2_emit_offset
|
|
void tc_pe_dwarf2_emit_offset (symbolS *, unsigned int);
|
|
|
|
#endif /* TE_PE */
|
|
|
|
#ifdef OBJ_ELF
|
|
#define CONVERT_SYMBOLIC_ATTRIBUTE(name) arm_convert_symbolic_attribute (name)
|
|
extern int arm_convert_symbolic_attribute (const char *);
|
|
extern int arm_apply_sym_value (struct fix *);
|
|
#endif
|