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- /* This file is tc-arm.h
- Copyright (C) 1994-2022 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_COFF
- # define ARM_BI_ENDIAN
- # if defined TE_PE
- # if 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
- /* We support double slash line-comments for compatibility with the ARM AArch64 Assembler. */
- #define DOUBLESLASH_LINE_COMMENTS
- /* We conditionally support labels without a colon. */
- #define LABELS_WITHOUT_COLONS codecomposer_syntax
- extern bool codecomposer_syntax;
- #define tc_symbol_chars arm_symbol_chars
- extern const char arm_symbol_chars[];
- #define TC_FORCE_RELOCATION(FIX) arm_force_relocation (FIX)
- extern unsigned int arm_frag_max_var (struct frag *);
- #define md_frag_max_var arm_frag_max_var
- #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 bool arm_optimize_expr (expressionS *, operatorT, expressionS *);
- #define md_cleanup() arm_cleanup ()
- #define md_start_line_hook() arm_start_line_hook ()
- #define TC_START_LABEL_WITHOUT_COLON(NUL_CHAR, NEXT_CHAR) \
- tc_start_label_without_colon ()
- extern bool tc_start_label_without_colon (void);
- #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);
- bool arm_is_eabi (void);
- #define md_post_relax_hook arm_md_post_relax ()
- extern void arm_md_post_relax (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) \
- ((s) != NULL \
- && ((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) \
- (((s) != NULL \
- && 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) ((s) && ARM_GET_FLAG (s) & THUMB_FLAG_FUNC)
- #define ARM_IS_FUNC(s) (!THUMB_IS_FUNC (s) \
- && (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(STR, NUL_CHAR, NEXT_CHAR) \
- (NEXT_CHAR == ':' || (NEXT_CHAR == '/' && 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) \
- (GENERIC_FORCE_RELOCATION_LOCAL (FIX) \
- || (FIX)->fx_r_type == BFD_RELOC_ARM_GOT32 \
- || (FIX)->fx_r_type == BFD_RELOC_32 \
- || ((FIX)->fx_addsy != NULL \
- && S_IS_WEAK ((FIX)->fx_addsy)))
- /* 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) \
- (GENERIC_FORCE_RELOCATION_SUB_SAME (FIX, SEG) \
- || THUMB_IS_FUNC ((FIX)->fx_addsy))
- #define TC_FORCE_RELOCATION_ABS(FIX) \
- (((FIX)->fx_pcrel \
- && (FIX)->fx_r_type != BFD_RELOC_32 \
- && (FIX)->fx_r_type != BFD_RELOC_ARM_GOT32) \
- || TC_FORCE_RELOCATION(FIX))
- #define TC_CONS_FIX_NEW cons_fix_new_arm
- #define MAX_MEM_ALIGNMENT_BYTES 6
- #define MAX_MEM_FOR_RS_ALIGN_CODE ((1 << MAX_MEM_ALIGNMENT_BYTES) - 1)
- /* 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. */
- struct arm_frag_type
- {
- int thumb_mode;
- #ifdef OBJ_ELF
- /* If there is a mapping symbol at offset 0 in this frag,
- it will be saved in FIRST_MAP. If there are any mapping
- symbols in this frag, the last one will be saved in
- LAST_MAP. */
- symbolS *first_map, *last_map;
- #endif
- };
- static inline int
- arm_min (int am_p1, int am_p2)
- {
- return am_p1 < am_p2 ? am_p1 : am_p2;
- }
- #define TC_FRAG_TYPE struct arm_frag_type
- #define TC_FRAG_INIT(fragp, max_bytes) arm_init_frag (fragp, max_bytes)
- #define TC_ALIGN_ZERO_IS_DEFAULT 1
- #define HANDLE_ALIGN(fragp) arm_handle_align (fragp)
- /* PR gas/19276: COFF/PE segment alignment is already handled in coff_frob_section(). */
- #ifndef TE_PE
- #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) \
- ((!(FRCHAIN)->frch_next && subseg_text_p (SEG)) \
- ? arm_min (2, get_recorded_alignment (SEG)) : 0)
- #endif
- #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)
- /* State variables for predication block handling. */
- enum pred_state
- {
- OUTSIDE_PRED_BLOCK, MANUAL_PRED_BLOCK, AUTOMATIC_PRED_BLOCK
- };
- enum pred_type {
- SCALAR_PRED, VECTOR_PRED
- };
- struct current_pred
- {
- int mask;
- enum pred_state state;
- int cc;
- int block_length;
- char *insn;
- int state_handled;
- int warn_deprecated;
- int insn_cond;
- enum pred_type type;
- };
- #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;
- /* Bit N indicates that an R_ARM_NONE relocation has been output for
- __aeabi_unwind_cpp_prN already if set. This enables dependencies to be
- emitted only once per section, to save unnecessary bloat. */
- unsigned int marked_pr_dependency;
- struct current_pred current_pred;
- };
- /* 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, this_segment)
- #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 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 bool 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 *,
- bfd_reloc_code_real_type);
- extern void arm_init_frag (struct frag *, int);
- extern void arm_handle_align (struct frag *);
- extern bool 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 *, segT);
- #endif
- #define tc_comment_chars arm_comment_chars
- extern char arm_comment_chars[];
- #define tc_line_separator_chars arm_line_separator_chars
- extern char arm_line_separator_chars[];
- #define TC_EQUAL_IN_INSN(c, s) arm_tc_equal_in_insn ((c), (s))
- extern bool arm_tc_equal_in_insn (int, char *);
- #define TC_LARGEST_EXPONENT_IS_NORMAL(PRECISION) \
- arm_is_largest_exponent_ok ((PRECISION))
- int arm_is_largest_exponent_ok (int precision);
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