160484Sobrien/* This file is tc-arm.h 2218822Sdim Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 3218822Sdim 2004, 2005, 2006, 2007 Free Software Foundation, Inc. 460484Sobrien Contributed by Richard Earnshaw (rwe@pegasus.esprit.ec.org) 560484Sobrien Modified by David Taylor (dtaylor@armltd.co.uk) 660484Sobrien 760484Sobrien This file is part of GAS, the GNU Assembler. 860484Sobrien 960484Sobrien GAS is free software; you can redistribute it and/or modify 1060484Sobrien it under the terms of the GNU General Public License as published by 1160484Sobrien the Free Software Foundation; either version 2, or (at your option) 1260484Sobrien any later version. 1360484Sobrien 1460484Sobrien GAS is distributed in the hope that it will be useful, 1560484Sobrien but WITHOUT ANY WARRANTY; without even the implied warranty of 1660484Sobrien MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 1760484Sobrien GNU General Public License for more details. 1860484Sobrien 1960484Sobrien You should have received a copy of the GNU General Public License 2060484Sobrien along with GAS; see the file COPYING. If not, write to the Free 21218822Sdim Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 22218822Sdim 02110-1301, USA. */ 2360484Sobrien 2460484Sobrien#define TC_ARM 1 2560484Sobrien 2660484Sobrien#ifndef TARGET_BYTES_BIG_ENDIAN 2760484Sobrien#define TARGET_BYTES_BIG_ENDIAN 0 2860484Sobrien#endif 2960484Sobrien 3060484Sobrien#define WORKING_DOT_WORD 3160484Sobrien 3260484Sobrien#define COFF_MAGIC ARMMAGIC 3360484Sobrien#define TARGET_ARCH bfd_arch_arm 3460484Sobrien 3560484Sobrien#define DIFF_EXPR_OK 3660484Sobrien 3760484Sobrien#ifdef LITTLE_ENDIAN 3860484Sobrien#undef LITTLE_ENDIAN 3960484Sobrien#endif 4060484Sobrien 4160484Sobrien#ifdef BIG_ENDIAN 4260484Sobrien#undef BIG_ENDIAN 4360484Sobrien#endif 4460484Sobrien 4560484Sobrien#define LITTLE_ENDIAN 1234 4660484Sobrien#define BIG_ENDIAN 4321 4760484Sobrien 48130561Sobrienstruct fix; 49130561Sobrien 5060484Sobrien#if defined OBJ_AOUT 51130561Sobrien# if defined TE_RISCIX 52130561Sobrien# define TARGET_FORMAT "a.out-riscix" 53130561Sobrien# elif defined TE_LINUX 54130561Sobrien# define ARM_BI_ENDIAN 55130561Sobrien# define TARGET_FORMAT "a.out-arm-linux" 56130561Sobrien# elif defined TE_NetBSD 57130561Sobrien# define TARGET_FORMAT "a.out-arm-netbsd" 58130561Sobrien# else 59130561Sobrien# define ARM_BI_ENDIAN 60130561Sobrien# define TARGET_FORMAT (target_big_endian ? "a.out-arm-big" : "a.out-arm-little") 61130561Sobrien# endif 62130561Sobrien#elif defined OBJ_AIF 63130561Sobrien# define TARGET_FORMAT "aif" 64130561Sobrien#elif defined OBJ_COFF 6560484Sobrien# define ARM_BI_ENDIAN 6660484Sobrien# if defined TE_PE 67130561Sobrien# if defined TE_EPOC 68130561Sobrien# define TARGET_FORMAT (target_big_endian ? "epoc-pe-arm-big" : "epoc-pe-arm-little") 69218822Sdim# elif defined TE_WINCE 70218822Sdim# define TARGET_FORMAT (target_big_endian ? "pe-arm-wince-big" : "pe-arm-wince-little") 71130561Sobrien# else 72130561Sobrien# define TARGET_FORMAT (target_big_endian ? "pe-arm-big" : "pe-arm-little") 73130561Sobrien# endif 7460484Sobrien# else 7560484Sobrien# define TARGET_FORMAT (target_big_endian ? "coff-arm-big" : "coff-arm-little") 7660484Sobrien# endif 77130561Sobrien#elif defined OBJ_ELF 78130561Sobrien# define ARM_BI_ENDIAN 79130561Sobrien# define TARGET_FORMAT elf32_arm_target_format () 8060484Sobrien#endif 8160484Sobrien 82130561Sobrien#define TC_FORCE_RELOCATION(FIX) arm_force_relocation (FIX) 8377298Sobrien 84218822Sdim#define md_relax_frag(segment, fragp, stretch) \ 85218822Sdim arm_relax_frag(segment, fragp, stretch) 86218822Sdimextern int arm_relax_frag (asection *, struct frag *, long); 8760484Sobrien 88218822Sdim#define md_optimize_expr(l,o,r) arm_optimize_expr (l, o, r) 89218822Sdimextern int arm_optimize_expr (expressionS *, operatorT, expressionS *); 90218822Sdim 9160484Sobrien#define md_cleanup() arm_cleanup () 9260484Sobrien 9360484Sobrien#define md_start_line_hook() arm_start_line_hook () 9460484Sobrien 9560484Sobrien#define tc_frob_label(S) arm_frob_label (S) 9660484Sobrien 9760484Sobrien/* We also need to mark assembler created symbols: */ 9860484Sobrien#define tc_frob_fake_label(S) arm_frob_label (S) 9960484Sobrien 100218822Sdim#ifdef OBJ_ELF 101218822Sdim#define md_end arm_md_end 102218822Sdimextern void arm_md_end (void); 103218822Sdimbfd_boolean arm_is_eabi (void); 104218822Sdim#endif 105218822Sdim 10660484Sobrien/* NOTE: The fake label creation in stabs.c:s_stab_generic() has 10760484Sobrien deliberately not been updated to mark assembler created stabs 10860484Sobrien symbols as Thumb. */ 10960484Sobrien 110218822Sdim#define TC_FIX_TYPE int 111218822Sdim#define TC_INIT_FIX_DATA(FIX) ((FIX)->tc_fix_data = 0) 11260484Sobrien 11360484Sobrien/* We need to keep some local information on symbols. */ 11460484Sobrien 115130561Sobrien#define TC_SYMFIELD_TYPE unsigned int 11660484Sobrien#define ARM_GET_FLAG(s) (*symbol_get_tc (s)) 11760484Sobrien#define ARM_SET_FLAG(s,v) (*symbol_get_tc (s) |= (v)) 11860484Sobrien#define ARM_RESET_FLAG(s,v) (*symbol_get_tc (s) &= ~(v)) 11960484Sobrien 12060484Sobrien#define ARM_FLAG_THUMB (1 << 0) /* The symbol is a Thumb symbol rather than an Arm symbol. */ 121130561Sobrien#define ARM_FLAG_INTERWORK (1 << 1) /* The symbol is attached to code that supports interworking. */ 12260484Sobrien#define THUMB_FLAG_FUNC (1 << 2) /* The symbol is attached to the start of a Thumb function. */ 12360484Sobrien 12460484Sobrien#define ARM_IS_THUMB(s) (ARM_GET_FLAG (s) & ARM_FLAG_THUMB) 12560484Sobrien#define ARM_IS_INTERWORK(s) (ARM_GET_FLAG (s) & ARM_FLAG_INTERWORK) 126218822Sdim#ifdef OBJ_ELF 127218822Sdim 128218822Sdim/* For ELF objects THUMB_IS_FUNC is inferred from 129218822Sdim ARM_IS_TUMB and the function type. */ 130218822Sdim#define THUMB_IS_FUNC(s) \ 131218822Sdim ((arm_is_eabi () \ 132218822Sdim && (ARM_IS_THUMB (s)) \ 133218822Sdim && (symbol_get_bfdsym (s)->flags & BSF_FUNCTION)) \ 134218822Sdim || (ARM_GET_FLAG (s) & THUMB_FLAG_FUNC)) 135218822Sdim 136218822Sdim#else 13760484Sobrien#define THUMB_IS_FUNC(s) (ARM_GET_FLAG (s) & THUMB_FLAG_FUNC) 138218822Sdim#endif 13960484Sobrien 14060484Sobrien#define ARM_SET_THUMB(s,t) ((t) ? ARM_SET_FLAG (s, ARM_FLAG_THUMB) : ARM_RESET_FLAG (s, ARM_FLAG_THUMB)) 14160484Sobrien#define ARM_SET_INTERWORK(s,t) ((t) ? ARM_SET_FLAG (s, ARM_FLAG_INTERWORK) : ARM_RESET_FLAG (s, ARM_FLAG_INTERWORK)) 14260484Sobrien#define THUMB_SET_FUNC(s,t) ((t) ? ARM_SET_FLAG (s, THUMB_FLAG_FUNC) : ARM_RESET_FLAG (s, THUMB_FLAG_FUNC)) 14360484Sobrien 144218822Sdimvoid arm_copy_symbol_attributes (symbolS *, symbolS *); 145218822Sdim#ifndef TC_COPY_SYMBOL_ATTRIBUTES 146218822Sdim#define TC_COPY_SYMBOL_ATTRIBUTES(DEST, SRC) \ 147218822Sdim (arm_copy_symbol_attributes (DEST, SRC)) 148218822Sdim#endif 149218822Sdim 150130561Sobrien#define TC_START_LABEL(C,STR) (c == ':' || (c == '/' && arm_data_in_code ())) 151130561Sobrien#define tc_canonicalize_symbol_name(str) arm_canonicalize_symbol_name (str); 152130561Sobrien#define obj_adjust_symtab() arm_adjust_symtab () 15360484Sobrien 15460484Sobrien#define LISTING_HEADER "ARM GAS " 15560484Sobrien 15660484Sobrien#define OPTIONAL_REGISTER_PREFIX '%' 15760484Sobrien 158218822Sdim#define LOCAL_LABEL(name) (name[0] == '.' && name[1] == 'L') 159218822Sdim#define LOCAL_LABELS_FB 1 16060484Sobrien 161130561Sobrien/* This expression evaluates to true if the relocation is for a local 162130561Sobrien object for which we still want to do the relocation at runtime. 163130561Sobrien False if we are willing to perform this relocation while building 164130561Sobrien the .o file. GOTOFF does not need to be checked here because it is 165130561Sobrien not pcrel. I am not sure if some of the others are ever used with 16660484Sobrien pcrel, but it is easier to be safe than sorry. */ 16760484Sobrien 168130561Sobrien#define TC_FORCE_RELOCATION_LOCAL(FIX) \ 169130561Sobrien (!(FIX)->fx_pcrel \ 170130561Sobrien || (FIX)->fx_r_type == BFD_RELOC_ARM_GOT32 \ 171130561Sobrien || (FIX)->fx_r_type == BFD_RELOC_32 \ 172130561Sobrien || TC_FORCE_RELOCATION (FIX)) 17360484Sobrien 174218822Sdim/* Force output of R_ARM_REL32 relocations against thumb function symbols. 175218822Sdim This is needed to ensure the low bit is handled correctly. */ 176218822Sdim#define TC_FORCE_RELOCATION_SUB_SAME(FIX, SEG) \ 177218822Sdim (THUMB_IS_FUNC ((FIX)->fx_addsy) \ 178218822Sdim || !SEG_NORMAL (SEG)) 179218822Sdim 18060484Sobrien#define TC_CONS_FIX_NEW cons_fix_new_arm 18160484Sobrien 18278828Sobrien#define MAX_MEM_FOR_RS_ALIGN_CODE 31 18378828Sobrien 18478828Sobrien/* For frags in code sections we need to record whether they contain 18578828Sobrien ARM code or THUMB code. This is that if they have to be aligned, 18678828Sobrien they can contain the correct type of no-op instruction. */ 187130561Sobrien#define TC_FRAG_TYPE int 18878828Sobrien#define TC_FRAG_INIT(fragp) arm_init_frag (fragp) 189130561Sobrien#define HANDLE_ALIGN(fragp) arm_handle_align (fragp) 19078828Sobrien 19178828Sobrien#define md_do_align(N, FILL, LEN, MAX, LABEL) \ 19278828Sobrien if (FILL == NULL && (N) != 0 && ! need_pass_2 && subseg_text_p (now_seg)) \ 19378828Sobrien { \ 19478828Sobrien arm_frag_align_code (N, MAX); \ 19578828Sobrien goto LABEL; \ 19678828Sobrien } 197130561Sobrien 198218822Sdim#define DWARF2_LINE_MIN_INSN_LENGTH 2 199218822Sdim 200218822Sdim/* The lr register is r14. */ 201218822Sdim#define DWARF2_DEFAULT_RETURN_COLUMN 14 202218822Sdim 203218822Sdim/* Registers are generally saved at negative offsets to the CFA. */ 204218822Sdim#define DWARF2_CIE_DATA_ALIGNMENT (-4) 205218822Sdim 206130561Sobrien#ifdef OBJ_ELF 207130561Sobrien# define obj_frob_symbol(sym, punt) armelf_frob_symbol ((sym), & (punt)) 208130561Sobrien# define md_elf_section_change_hook() arm_elf_change_section () 209218822Sdim# define md_elf_section_type(str, len) arm_elf_section_type (str, len) 210130561Sobrien# define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_" 211218822Sdim# define TC_SEGMENT_INFO_TYPE struct arm_segment_info_type 212130561Sobrien 213218822Sdim/* This is not really an alignment operation, but it's something we 214218822Sdim need to do at the same time: whenever we are figuring out the 215218822Sdim alignment for data, we should check whether a $d symbol is 216218822Sdim necessary. */ 217218822Sdim# define md_cons_align(nbytes) mapping_state (MAP_DATA) 218218822Sdim 219130561Sobrienenum mstate 220130561Sobrien{ 221130561Sobrien MAP_UNDEFINED = 0, /* Must be zero, for seginfo in new sections. */ 222130561Sobrien MAP_DATA, 223130561Sobrien MAP_ARM, 224130561Sobrien MAP_THUMB 225130561Sobrien}; 226130561Sobrien 227218822Sdimvoid mapping_state (enum mstate); 228218822Sdim 229218822Sdimstruct arm_segment_info_type 230218822Sdim{ 231218822Sdim enum mstate mapstate; 232218822Sdim unsigned int marked_pr_dependency; 233218822Sdim}; 234218822Sdim 235218822Sdim/* We want .cfi_* pseudo-ops for generating unwind info. */ 236218822Sdim#define TARGET_USE_CFIPOP 1 237218822Sdim 238218822Sdim/* CFI hooks. */ 239218822Sdim#define tc_regname_to_dw2regnum tc_arm_regname_to_dw2regnum 240218822Sdim#define tc_cfi_frame_initial_instructions tc_arm_frame_initial_instructions 241218822Sdim 242130561Sobrien#else /* Not OBJ_ELF. */ 243130561Sobrien#define GLOBAL_OFFSET_TABLE_NAME "__GLOBAL_OFFSET_TABLE_" 244130561Sobrien#endif 245130561Sobrien 246130561Sobrien#if defined OBJ_ELF || defined OBJ_COFF 247130561Sobrien 248130561Sobrien# define EXTERN_FORCE_RELOC 1 249130561Sobrien# define tc_fix_adjustable(FIX) arm_fix_adjustable (FIX) 250218822Sdim/* Values passed to md_apply_fix don't include the symbol value. */ 251130561Sobrien# define MD_APPLY_SYM_VALUE(FIX) 0 252130561Sobrien# define TC_VALIDATE_FIX(FIX, SEGTYPE, LABEL) arm_validate_fix (FIX) 253130561Sobrien 254130561Sobrien#endif 255130561Sobrien 256218822Sdim#define MD_PCREL_FROM_SECTION(F,S) md_pcrel_from_section(F,S) 257218822Sdim 258218822Sdimextern long md_pcrel_from_section (struct fix *, segT); 259130561Sobrienextern void arm_frag_align_code (int, int); 260130561Sobrienextern void arm_validate_fix (struct fix *); 261130561Sobrienextern const char * elf32_arm_target_format (void); 262130561Sobrienextern void arm_elf_change_section (void); 263130561Sobrienextern int arm_force_relocation (struct fix *); 264130561Sobrienextern void arm_cleanup (void); 265130561Sobrienextern void arm_start_line_hook (void); 266130561Sobrienextern void arm_frob_label (symbolS *); 267130561Sobrienextern int arm_data_in_code (void); 268130561Sobrienextern char * arm_canonicalize_symbol_name (char *); 269130561Sobrienextern void arm_adjust_symtab (void); 270130561Sobrienextern void armelf_frob_symbol (symbolS *, int *); 271130561Sobrienextern void cons_fix_new_arm (fragS *, int, int, expressionS *); 272130561Sobrienextern void arm_init_frag (struct frag *); 273130561Sobrienextern void arm_handle_align (struct frag *); 274130561Sobrienextern bfd_boolean arm_fix_adjustable (struct fix *); 275218822Sdimextern int arm_elf_section_type (const char *, size_t); 276218822Sdimextern int tc_arm_regname_to_dw2regnum (char *regname); 277218822Sdimextern void tc_arm_frame_initial_instructions (void); 278218822Sdim 279218822Sdim#ifdef TE_PE 280218822Sdim 281218822Sdim#define O_secrel O_md1 282218822Sdim 283218822Sdim#define TC_DWARF2_EMIT_OFFSET tc_pe_dwarf2_emit_offset 284218822Sdimvoid tc_pe_dwarf2_emit_offset (symbolS *, unsigned int); 285218822Sdim 286218822Sdim#endif /* TE_PE */ 287