/* This file is tc-arm.h
- Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
- Free Software Foundation, Inc.
+ Copyright (C) 1994-2021 Free Software Foundation, Inc.
Contributed by Richard Earnshaw (rwe@pegasus.esprit.ec.org)
Modified by David Taylor (dtaylor@armltd.co.uk)
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)
+ 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,
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, 59 Temple Place - Suite 330, Boston, MA
- 02111-1307, USA. */
+ Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
+ 02110-1301, USA. */
#define TC_ARM 1
#define COFF_MAGIC ARMMAGIC
#define TARGET_ARCH bfd_arch_arm
-#define AOUT_MACHTYPE 0
-
#define DIFF_EXPR_OK
#ifdef LITTLE_ENDIAN
#define LITTLE_ENDIAN 1234
#define BIG_ENDIAN 4321
-#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
-#endif /* OBJ_AOUT */
-
-#ifdef OBJ_AIF
-#define TARGET_FORMAT "aif"
-#endif
+struct fix;
-#if defined OBJ_COFF || defined OBJ_ELF
+#if defined OBJ_COFF
# define ARM_BI_ENDIAN
-
-# define TC_VALIDATE_FIX(fixP, segType, Label) \
- if (arm_validate_fix (fixP)) add_symbolP = fixP->fx_addsy
- extern boolean arm_validate_fix PARAMS ((struct fix *));
-#endif
-
-#ifdef OBJ_COFF
# if defined TE_PE
-# define TC_FORCE_RELOCATION(x) ((x)->fx_r_type == BFD_RELOC_RVA)
-# ifdef 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
+# 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
-#ifdef OBJ_ELF
-# define TARGET_FORMAT elf32_arm_target_format()
- extern const char * elf32_arm_target_format PARAMS ((void));
+/* We support double slash line-comments for compatibility with the ARM AArch64 Assembler. */
+#define DOUBLESLASH_LINE_COMMENTS
-# define TC_FORCE_RELOCATION(fixp) arm_force_relocation (fixp)
- extern int arm_force_relocation PARAMS ((struct fix *));
-#endif
+/* We conditionally support labels without a colon. */
+#define LABELS_WITHOUT_COLONS codecomposer_syntax
+extern bfd_boolean codecomposer_syntax;
+
+#define tc_symbol_chars arm_symbol_chars
+extern const char arm_symbol_chars[];
-#define md_convert_frag(b, s, f) {as_fatal (_("arm convert_frag\n"));}
+#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 int arm_optimize_expr (expressionS *, operatorT, expressionS *);
#define md_cleanup() arm_cleanup ()
- extern void arm_cleanup PARAMS ((void));
#define md_start_line_hook() arm_start_line_hook ()
- extern void arm_start_line_hook PARAMS ((void));
+
+#define TC_START_LABEL_WITHOUT_COLON(NUL_CHAR, NEXT_CHAR) \
+ tc_start_label_without_colon ()
+extern bfd_boolean tc_start_label_without_colon (void);
#define tc_frob_label(S) arm_frob_label (S)
- extern void arm_frob_label PARAMS ((symbolS *));
/* 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);
+
+#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 PTR
-#define TC_INIT_FIX_DATA(FIXP) ((FIXP)->tc_fix_data = NULL)
-
-#if defined OBJ_ELF || defined OBJ_COFF
-#include "write.h" /* For definition of fixS */
-#define obj_fix_adjustable(fixP) arm_fix_adjustable (fixP)
-boolean arm_fix_adjustable PARAMS ((fixS *));
-
-/* This arranges for gas/write.c to not apply a relocation if
- obj_fix_adjustable() says it is not adjustable. */
-#define TC_FIX_ADJUSTABLE(fixP) obj_fix_adjustable (fixP)
-#else
-#define obj_fix_adjustable(fixP) 0
-#endif
+#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 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 suppports interworking. */
+#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)
+
+#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))
-#define TC_START_LABEL(C,STR) \
- (c == ':' || (c == '/' && arm_data_in_code ()))
-int arm_data_in_code PARAMS ((void));
-
-#define tc_canonicalize_symbol_name(str) \
- arm_canonicalize_symbol_name (str);
-char * arm_canonicalize_symbol_name PARAMS ((char *));
-
-#define obj_adjust_symtab() arm_adjust_symtab ()
- extern void arm_adjust_symtab PARAMS ((void));
+void arm_copy_symbol_attributes (symbolS *, symbolS *);
-#ifdef OBJ_ELF
-#define obj_frob_symbol(sym, punt) armelf_frob_symbol ((sym), & (punt))
-void armelf_frob_symbol PARAMS ((symbolS *, int *));
+#ifndef TC_COPY_SYMBOL_ATTRIBUTES
+#define TC_COPY_SYMBOL_ATTRIBUTES(DEST, SRC) \
+ (arm_copy_symbol_attributes (DEST, SRC))
#endif
-#define tc_aout_pre_write_hook(x) {;} /* not used */
+#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 md_operand(x)
+#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_HANDLES_FX_DONE
+#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 MD_APPLY_FIX3
+#define MAX_MEM_ALIGNMENT_BYTES 6
+#define MAX_MEM_FOR_RS_ALIGN_CODE ((1 << MAX_MEM_ALIGNMENT_BYTES) - 1)
-#define LOCAL_LABEL(name) (name[0] == '.' && (name[1] == 'L'))
-#define LOCAL_LABELS_FB 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
-#define LOCAL_LABEL_PREFIX '.'
+ /* 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
-/* This expression evaluates to false if the relocation is for a local object
- for which we still want to do the relocation at runtime. True if we
- are willing to perform this relocation while building the .o file.
- This is only used for pcrel relocations, so GOTOFF does not need to be
- checked here. I am not sure if some of the others are ever used with
- pcrel, but it is easier to be safe than sorry. */
+#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 TC_RELOC_RTSYM_LOC_FIXUP(FIX) \
- ( (FIX)->fx_r_type != BFD_RELOC_ARM_GOT12 \
- && (FIX)->fx_r_type != BFD_RELOC_ARM_GOT32 \
- && (FIX)->fx_r_type != BFD_RELOC_32)
+#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;
+};
-#define TC_CONS_FIX_NEW cons_fix_new_arm
- extern void cons_fix_new_arm PARAMS ((fragS *, int, int, expressionS *));
+#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
-/* Don't allow symbols to be discarded on GOT related relocs,
- nor on globals. */
-#define tc_fix_adjustable(x) (\
- ((x)->fx_r_type == BFD_RELOC_ARM_PLT32 \
- || (x)->fx_r_type == BFD_RELOC_ARM_GOT32 \
- || (x)->fx_r_type == BFD_RELOC_ARM_GOTOFF \
- || S_IS_EXTERN ((x)->fx_addsy) \
- || S_IS_WEAK ((x)->fx_addsy)) ? 0 : 1)
+#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
-#define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
-#else
-#define GLOBAL_OFFSET_TABLE_NAME "__GLOBAL_OFFSET_TABLE_"
+/* 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 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 *,
+ bfd_reloc_code_real_type);
+extern void arm_init_frag (struct frag *, int);
+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 DWARF2_LINE_MIN_INSN_LENGTH 2
+#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 MAX_MEM_FOR_RS_ALIGN_CODE 31
+#define tc_comment_chars arm_comment_chars
+extern char arm_comment_chars[];
-/* 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)
-extern void arm_init_frag PARAMS ((struct frag *));
+#define tc_line_separator_chars arm_line_separator_chars
+extern char arm_line_separator_chars[];
-#define HANDLE_ALIGN(fragp) arm_handle_align (fragp)
-extern void arm_handle_align PARAMS ((struct frag *));
+#define TC_EQUAL_IN_INSN(c, s) arm_tc_equal_in_insn ((c), (s))
+extern bfd_boolean arm_tc_equal_in_insn (int, char *);
-#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; \
- }
-extern void arm_frag_align_code PARAMS ((int, int));
+#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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