/* 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)
- Copyright (C) 1994, 1995 Free Software Foundation, Inc.
-
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)
+ 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,
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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ 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
-#define COFF_MAGIC ARMMAGIC
-#define TARGET_ARCH bfd_arch_arm
+#ifndef TARGET_BYTES_BIG_ENDIAN
+#define TARGET_BYTES_BIG_ENDIAN 0
+#endif
-#define AOUT_MACHTYPE 0
+#define WORKING_DOT_WORD
+
+#define COFF_MAGIC ARMMAGIC
+#define TARGET_ARCH bfd_arch_arm
#define DIFF_EXPR_OK
-#define LITTLE_ENDIAN 1234
-#define BIG_ENDIAN 4321
+#ifdef LITTLE_ENDIAN
+#undef LITTLE_ENDIAN
+#endif
-/* If neither TARGET_BYTES_BIG_ENDIAN nor TARGET_BYTES_LITTLE_ENDIAN
- is specified, default to little endian. */
-#ifndef TARGET_BYTES_BIG_ENDIAN
-#ifndef TARGET_BYTES_LITTLE_ENDIAN
-#define TARGET_BYTES_LITTLE_ENDIAN
+#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
-#ifdef OBJ_AOUT
-#ifdef TE_RISCIX
-#define TARGET_FORMAT "a.out-riscix"
-#else
-#ifdef TARGET_BYTES_BIG_ENDIAN
-#define TARGET_FORMAT "a.out-arm-big"
-#else
-#define TARGET_FORMAT "a.out-arm-little"
+#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) \
+ ((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
-#ifdef OBJ_AIF
-#define TARGET_FORMAT "aif"
+#define TC_START_LABEL(C,S,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 \
+ || ((FIX)->fx_addsy != NULL && S_IS_WEAK ((FIX)->fx_addsy)) \
+ || 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_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
+};
-#ifdef OBJ_COFF
-#ifdef TE_PE
-#define TC_FORCE_RELOCATION(x) ((x)->fx_r_type==11)
-#define TARGET_FORMAT (target_big_endian ? "pe-arm-big" : "pe-arm-little")
-/* Tell tc-arm.c to support runtime endian selection. */
-#define ARM_BI_ENDIAN
+#define TC_FRAG_TYPE struct arm_frag_type
+/* NOTE: max_chars is a local variable from frag_var / frag_variant. */
+#define TC_FRAG_INIT(fragp) arm_init_frag (fragp, max_chars)
+#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)
+
+/* State variables for IT block handling. */
+enum it_state
+{
+ OUTSIDE_IT_BLOCK, MANUAL_IT_BLOCK, AUTOMATIC_IT_BLOCK
+};
+struct current_it
+{
+ int mask;
+ enum it_state state;
+ int cc;
+ int block_length;
+ char *insn;
+ int state_handled;
+};
+
+#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_it current_it;
+};
+
+/* 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
-#define md_convert_frag(b,s,f) {as_fatal ("arm convert_frag\n");}
+#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
-#define md_after_pass_hook() arm_after_pass_hook ()
-#define md_start_line_hook() arm_start_line_hook ()
-#define tc_frob_label(S) arm_frob_label (S)
-
-#define obj_fix_adjustable(fixP) 0
-
-#if 0 /* It isn't as simple as this */
-#define tc_frob_symbol(sym,punt) \
-{ if (S_IS_LOCAL (sym)) \
- { \
- punt = 1; \
- sym->sy_used_in_reloc = 0; \
- }}
-#endif
-
-#if 0
-#define tc_crawl_symbol_chain(a) {;} /* not used */
-#define tc_headers_hook(a) {;} /* not used */
+#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 tc_aout_pre_write_hook(x) {;} /* not used */
+#define MD_PCREL_FROM_SECTION(F,S) md_pcrel_from_section(F,S)
-#define LISTING_HEADER "ARM GAS "
+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 *, 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);
-#define OPTIONAL_REGISTER_PREFIX '%'
+#ifdef TE_PE
-#define md_operand(x)
+#define O_secrel O_md1
-#define LOCAL_LABELS_FB 1
+#define TC_DWARF2_EMIT_OFFSET tc_pe_dwarf2_emit_offset
+void tc_pe_dwarf2_emit_offset (symbolS *, unsigned int);
-/* Use defaults for OBJ_AOUT. */
-#ifndef OBJ_AOUT
-#define LOCAL_LABEL(name) ((name)[0] == '.' && (name)[1] == 'L')
-#define FAKE_LABEL_NAME ".L0\001"
-#endif
+#endif /* TE_PE */
-/* end of tc-arm.h */
+#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
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