| 1 | /* tc-arc.c -- Assembler for the ARC |
| 2 | Copyright (C) 1994-2016 Free Software Foundation, Inc. |
| 3 | |
| 4 | Contributor: Claudiu Zissulescu <claziss@synopsys.com> |
| 5 | |
| 6 | This file is part of GAS, the GNU Assembler. |
| 7 | |
| 8 | GAS is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 3, or (at your option) |
| 11 | any later version. |
| 12 | |
| 13 | GAS is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with GAS; see the file COPYING. If not, write to the Free |
| 20 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA |
| 21 | 02110-1301, USA. */ |
| 22 | |
| 23 | #include "as.h" |
| 24 | #include "subsegs.h" |
| 25 | #include "struc-symbol.h" |
| 26 | #include "dwarf2dbg.h" |
| 27 | #include "dw2gencfi.h" |
| 28 | #include "safe-ctype.h" |
| 29 | |
| 30 | #include "opcode/arc.h" |
| 31 | #include "elf/arc.h" |
| 32 | |
| 33 | /* Defines section. */ |
| 34 | |
| 35 | #define MAX_INSN_FIXUPS 2 |
| 36 | #define MAX_CONSTR_STR 20 |
| 37 | #define FRAG_MAX_GROWTH 8 |
| 38 | |
| 39 | #ifdef DEBUG |
| 40 | # define pr_debug(fmt, args...) fprintf (stderr, fmt, ##args) |
| 41 | #else |
| 42 | # define pr_debug(fmt, args...) |
| 43 | #endif |
| 44 | |
| 45 | #define MAJOR_OPCODE(x) (((x) & 0xF8000000) >> 27) |
| 46 | #define SUB_OPCODE(x) (((x) & 0x003F0000) >> 16) |
| 47 | #define LP_INSN(x) ((MAJOR_OPCODE (x) == 0x4) && \ |
| 48 | (SUB_OPCODE (x) == 0x28)) |
| 49 | |
| 50 | /* Equal to MAX_PRECISION in atof-ieee.c. */ |
| 51 | #define MAX_LITTLENUMS 6 |
| 52 | |
| 53 | /* Enum used to enumerate the relaxable ins operands. */ |
| 54 | enum rlx_operand_type |
| 55 | { |
| 56 | EMPTY = 0, |
| 57 | REGISTER, |
| 58 | REGISTER_S, /* Register for short instruction(s). */ |
| 59 | REGISTER_NO_GP, /* Is a register but not gp register specifically. */ |
| 60 | REGISTER_DUP, /* Duplication of previous operand of type register. */ |
| 61 | IMMEDIATE, |
| 62 | BRACKET |
| 63 | }; |
| 64 | |
| 65 | enum arc_rlx_types |
| 66 | { |
| 67 | ARC_RLX_NONE = 0, |
| 68 | ARC_RLX_BL_S, |
| 69 | ARC_RLX_BL, |
| 70 | ARC_RLX_B_S, |
| 71 | ARC_RLX_B, |
| 72 | ARC_RLX_ADD_U3, |
| 73 | ARC_RLX_ADD_U6, |
| 74 | ARC_RLX_ADD_LIMM, |
| 75 | ARC_RLX_LD_U7, |
| 76 | ARC_RLX_LD_S9, |
| 77 | ARC_RLX_LD_LIMM, |
| 78 | ARC_RLX_MOV_U8, |
| 79 | ARC_RLX_MOV_S12, |
| 80 | ARC_RLX_MOV_LIMM, |
| 81 | ARC_RLX_SUB_U3, |
| 82 | ARC_RLX_SUB_U6, |
| 83 | ARC_RLX_SUB_LIMM, |
| 84 | ARC_RLX_MPY_U6, |
| 85 | ARC_RLX_MPY_LIMM, |
| 86 | ARC_RLX_MOV_RU6, |
| 87 | ARC_RLX_MOV_RLIMM, |
| 88 | ARC_RLX_ADD_RRU6, |
| 89 | ARC_RLX_ADD_RRLIMM, |
| 90 | }; |
| 91 | |
| 92 | /* Macros section. */ |
| 93 | |
| 94 | #define regno(x) ((x) & 0x3F) |
| 95 | #define is_ir_num(x) (((x) & ~0x3F) == 0) |
| 96 | #define is_code_density_p(op) (((op)->subclass == CD1 || (op)->subclass == CD2)) |
| 97 | #define is_br_jmp_insn_p(op) (((op)->class == BRANCH || (op)->class == JUMP)) |
| 98 | #define is_kernel_insn_p(op) (((op)->class == KERNEL)) |
| 99 | |
| 100 | /* Generic assembler global variables which must be defined by all |
| 101 | targets. */ |
| 102 | |
| 103 | /* Characters which always start a comment. */ |
| 104 | const char comment_chars[] = "#;"; |
| 105 | |
| 106 | /* Characters which start a comment at the beginning of a line. */ |
| 107 | const char line_comment_chars[] = "#"; |
| 108 | |
| 109 | /* Characters which may be used to separate multiple commands on a |
| 110 | single line. */ |
| 111 | const char line_separator_chars[] = "`"; |
| 112 | |
| 113 | /* Characters which are used to indicate an exponent in a floating |
| 114 | point number. */ |
| 115 | const char EXP_CHARS[] = "eE"; |
| 116 | |
| 117 | /* Chars that mean this number is a floating point constant |
| 118 | As in 0f12.456 or 0d1.2345e12. */ |
| 119 | const char FLT_CHARS[] = "rRsSfFdD"; |
| 120 | |
| 121 | /* Byte order. */ |
| 122 | extern int target_big_endian; |
| 123 | const char *arc_target_format = DEFAULT_TARGET_FORMAT; |
| 124 | static int byte_order = DEFAULT_BYTE_ORDER; |
| 125 | |
| 126 | /* By default relaxation is disabled. */ |
| 127 | static int relaxation_state = 0; |
| 128 | |
| 129 | extern int arc_get_mach (char *); |
| 130 | |
| 131 | /* Forward declarations. */ |
| 132 | static void arc_lcomm (int); |
| 133 | static void arc_option (int); |
| 134 | static void arc_extra_reloc (int); |
| 135 | |
| 136 | |
| 137 | const pseudo_typeS md_pseudo_table[] = |
| 138 | { |
| 139 | /* Make sure that .word is 32 bits. */ |
| 140 | { "word", cons, 4 }, |
| 141 | |
| 142 | { "align", s_align_bytes, 0 }, /* Defaulting is invalid (0). */ |
| 143 | { "lcomm", arc_lcomm, 0 }, |
| 144 | { "lcommon", arc_lcomm, 0 }, |
| 145 | { "cpu", arc_option, 0 }, |
| 146 | |
| 147 | { "tls_gd_ld", arc_extra_reloc, BFD_RELOC_ARC_TLS_GD_LD }, |
| 148 | { "tls_gd_call", arc_extra_reloc, BFD_RELOC_ARC_TLS_GD_CALL }, |
| 149 | |
| 150 | { NULL, NULL, 0 } |
| 151 | }; |
| 152 | |
| 153 | const char *md_shortopts = ""; |
| 154 | |
| 155 | enum options |
| 156 | { |
| 157 | OPTION_EB = OPTION_MD_BASE, |
| 158 | OPTION_EL, |
| 159 | |
| 160 | OPTION_ARC600, |
| 161 | OPTION_ARC601, |
| 162 | OPTION_ARC700, |
| 163 | OPTION_ARCEM, |
| 164 | OPTION_ARCHS, |
| 165 | |
| 166 | OPTION_MCPU, |
| 167 | OPTION_CD, |
| 168 | OPTION_RELAX, |
| 169 | |
| 170 | /* The following options are deprecated and provided here only for |
| 171 | compatibility reasons. */ |
| 172 | OPTION_USER_MODE, |
| 173 | OPTION_LD_EXT_MASK, |
| 174 | OPTION_SWAP, |
| 175 | OPTION_NORM, |
| 176 | OPTION_BARREL_SHIFT, |
| 177 | OPTION_MIN_MAX, |
| 178 | OPTION_NO_MPY, |
| 179 | OPTION_EA, |
| 180 | OPTION_MUL64, |
| 181 | OPTION_SIMD, |
| 182 | OPTION_SPFP, |
| 183 | OPTION_DPFP, |
| 184 | OPTION_XMAC_D16, |
| 185 | OPTION_XMAC_24, |
| 186 | OPTION_DSP_PACKA, |
| 187 | OPTION_CRC, |
| 188 | OPTION_DVBF, |
| 189 | OPTION_TELEPHONY, |
| 190 | OPTION_XYMEMORY, |
| 191 | OPTION_LOCK, |
| 192 | OPTION_SWAPE, |
| 193 | OPTION_RTSC, |
| 194 | OPTION_FPUDA |
| 195 | }; |
| 196 | |
| 197 | struct option md_longopts[] = |
| 198 | { |
| 199 | { "EB", no_argument, NULL, OPTION_EB }, |
| 200 | { "EL", no_argument, NULL, OPTION_EL }, |
| 201 | { "mcpu", required_argument, NULL, OPTION_MCPU }, |
| 202 | { "mA6", no_argument, NULL, OPTION_ARC600 }, |
| 203 | { "mARC600", no_argument, NULL, OPTION_ARC600 }, |
| 204 | { "mARC601", no_argument, NULL, OPTION_ARC601 }, |
| 205 | { "mARC700", no_argument, NULL, OPTION_ARC700 }, |
| 206 | { "mA7", no_argument, NULL, OPTION_ARC700 }, |
| 207 | { "mEM", no_argument, NULL, OPTION_ARCEM }, |
| 208 | { "mHS", no_argument, NULL, OPTION_ARCHS }, |
| 209 | { "mcode-density", no_argument, NULL, OPTION_CD }, |
| 210 | { "mrelax", no_argument, NULL, OPTION_RELAX }, |
| 211 | |
| 212 | /* The following options are deprecated and provided here only for |
| 213 | compatibility reasons. */ |
| 214 | { "mav2em", no_argument, NULL, OPTION_ARCEM }, |
| 215 | { "mav2hs", no_argument, NULL, OPTION_ARCHS }, |
| 216 | { "muser-mode-only", no_argument, NULL, OPTION_USER_MODE }, |
| 217 | { "mld-extension-reg-mask", required_argument, NULL, OPTION_LD_EXT_MASK }, |
| 218 | { "mswap", no_argument, NULL, OPTION_SWAP }, |
| 219 | { "mnorm", no_argument, NULL, OPTION_NORM }, |
| 220 | { "mbarrel-shifter", no_argument, NULL, OPTION_BARREL_SHIFT }, |
| 221 | { "mbarrel_shifter", no_argument, NULL, OPTION_BARREL_SHIFT }, |
| 222 | { "mmin-max", no_argument, NULL, OPTION_MIN_MAX }, |
| 223 | { "mmin_max", no_argument, NULL, OPTION_MIN_MAX }, |
| 224 | { "mno-mpy", no_argument, NULL, OPTION_NO_MPY }, |
| 225 | { "mea", no_argument, NULL, OPTION_EA }, |
| 226 | { "mEA", no_argument, NULL, OPTION_EA }, |
| 227 | { "mmul64", no_argument, NULL, OPTION_MUL64 }, |
| 228 | { "msimd", no_argument, NULL, OPTION_SIMD}, |
| 229 | { "mspfp", no_argument, NULL, OPTION_SPFP}, |
| 230 | { "mspfp-compact", no_argument, NULL, OPTION_SPFP}, |
| 231 | { "mspfp_compact", no_argument, NULL, OPTION_SPFP}, |
| 232 | { "mspfp-fast", no_argument, NULL, OPTION_SPFP}, |
| 233 | { "mspfp_fast", no_argument, NULL, OPTION_SPFP}, |
| 234 | { "mdpfp", no_argument, NULL, OPTION_DPFP}, |
| 235 | { "mdpfp-compact", no_argument, NULL, OPTION_DPFP}, |
| 236 | { "mdpfp_compact", no_argument, NULL, OPTION_DPFP}, |
| 237 | { "mdpfp-fast", no_argument, NULL, OPTION_DPFP}, |
| 238 | { "mdpfp_fast", no_argument, NULL, OPTION_DPFP}, |
| 239 | { "mmac-d16", no_argument, NULL, OPTION_XMAC_D16}, |
| 240 | { "mmac_d16", no_argument, NULL, OPTION_XMAC_D16}, |
| 241 | { "mmac-24", no_argument, NULL, OPTION_XMAC_24}, |
| 242 | { "mmac_24", no_argument, NULL, OPTION_XMAC_24}, |
| 243 | { "mdsp-packa", no_argument, NULL, OPTION_DSP_PACKA}, |
| 244 | { "mdsp_packa", no_argument, NULL, OPTION_DSP_PACKA}, |
| 245 | { "mcrc", no_argument, NULL, OPTION_CRC}, |
| 246 | { "mdvbf", no_argument, NULL, OPTION_DVBF}, |
| 247 | { "mtelephony", no_argument, NULL, OPTION_TELEPHONY}, |
| 248 | { "mxy", no_argument, NULL, OPTION_XYMEMORY}, |
| 249 | { "mlock", no_argument, NULL, OPTION_LOCK}, |
| 250 | { "mswape", no_argument, NULL, OPTION_SWAPE}, |
| 251 | { "mrtsc", no_argument, NULL, OPTION_RTSC}, |
| 252 | { "mfpuda", no_argument, NULL, OPTION_FPUDA}, |
| 253 | |
| 254 | { NULL, no_argument, NULL, 0 } |
| 255 | }; |
| 256 | |
| 257 | size_t md_longopts_size = sizeof (md_longopts); |
| 258 | |
| 259 | /* Local data and data types. */ |
| 260 | |
| 261 | /* Used since new relocation types are introduced in this |
| 262 | file (DUMMY_RELOC_LITUSE_*). */ |
| 263 | typedef int extended_bfd_reloc_code_real_type; |
| 264 | |
| 265 | struct arc_fixup |
| 266 | { |
| 267 | expressionS exp; |
| 268 | |
| 269 | extended_bfd_reloc_code_real_type reloc; |
| 270 | |
| 271 | /* index into arc_operands. */ |
| 272 | unsigned int opindex; |
| 273 | |
| 274 | /* PC-relative, used by internals fixups. */ |
| 275 | unsigned char pcrel; |
| 276 | |
| 277 | /* TRUE if this fixup is for LIMM operand. */ |
| 278 | bfd_boolean islong; |
| 279 | }; |
| 280 | |
| 281 | struct arc_insn |
| 282 | { |
| 283 | unsigned int insn; |
| 284 | int nfixups; |
| 285 | struct arc_fixup fixups[MAX_INSN_FIXUPS]; |
| 286 | long limm; |
| 287 | bfd_boolean short_insn; /* Boolean value: TRUE if current insn is |
| 288 | short. */ |
| 289 | bfd_boolean has_limm; /* Boolean value: TRUE if limm field is |
| 290 | valid. */ |
| 291 | bfd_boolean relax; /* Boolean value: TRUE if needs |
| 292 | relaxation. */ |
| 293 | }; |
| 294 | |
| 295 | /* Structure to hold any last two instructions. */ |
| 296 | static struct arc_last_insn |
| 297 | { |
| 298 | /* Saved instruction opcode. */ |
| 299 | const struct arc_opcode *opcode; |
| 300 | |
| 301 | /* Boolean value: TRUE if current insn is short. */ |
| 302 | bfd_boolean has_limm; |
| 303 | |
| 304 | /* Boolean value: TRUE if current insn has delay slot. */ |
| 305 | bfd_boolean has_delay_slot; |
| 306 | } arc_last_insns[2]; |
| 307 | |
| 308 | /* Forward declaration. */ |
| 309 | static void assemble_insn |
| 310 | (const struct arc_opcode *, const expressionS *, int, |
| 311 | const struct arc_flags *, int, struct arc_insn *); |
| 312 | |
| 313 | /* The cpu for which we are generating code. */ |
| 314 | static unsigned arc_target = ARC_OPCODE_BASE; |
| 315 | static const char *arc_target_name = "<all>"; |
| 316 | static unsigned arc_features = 0x00; |
| 317 | |
| 318 | /* The default architecture. */ |
| 319 | static int arc_mach_type = bfd_mach_arc_arcv2; |
| 320 | |
| 321 | /* Non-zero if the cpu type has been explicitly specified. */ |
| 322 | static int mach_type_specified_p = 0; |
| 323 | |
| 324 | /* The hash table of instruction opcodes. */ |
| 325 | static struct hash_control *arc_opcode_hash; |
| 326 | |
| 327 | /* The hash table of register symbols. */ |
| 328 | static struct hash_control *arc_reg_hash; |
| 329 | |
| 330 | /* A table of CPU names and opcode sets. */ |
| 331 | static const struct cpu_type |
| 332 | { |
| 333 | const char *name; |
| 334 | unsigned flags; |
| 335 | int mach; |
| 336 | unsigned eflags; |
| 337 | unsigned features; |
| 338 | } |
| 339 | cpu_types[] = |
| 340 | { |
| 341 | { "arc600", ARC_OPCODE_ARC600, bfd_mach_arc_arc600, |
| 342 | E_ARC_MACH_ARC600, 0x00}, |
| 343 | { "arc700", ARC_OPCODE_ARC700, bfd_mach_arc_arc700, |
| 344 | E_ARC_MACH_ARC700, 0x00}, |
| 345 | { "arcem", ARC_OPCODE_ARCv2EM, bfd_mach_arc_arcv2, |
| 346 | EF_ARC_CPU_ARCV2EM, 0x00}, |
| 347 | { "archs", ARC_OPCODE_ARCv2HS, bfd_mach_arc_arcv2, |
| 348 | EF_ARC_CPU_ARCV2HS, ARC_CD}, |
| 349 | { "all", ARC_OPCODE_BASE, bfd_mach_arc_arcv2, |
| 350 | 0x00, 0x00 }, |
| 351 | { 0, 0, 0, 0, 0 } |
| 352 | }; |
| 353 | |
| 354 | /* Used by the arc_reloc_op table. Order is important. */ |
| 355 | #define O_gotoff O_md1 /* @gotoff relocation. */ |
| 356 | #define O_gotpc O_md2 /* @gotpc relocation. */ |
| 357 | #define O_plt O_md3 /* @plt relocation. */ |
| 358 | #define O_sda O_md4 /* @sda relocation. */ |
| 359 | #define O_pcl O_md5 /* @pcl relocation. */ |
| 360 | #define O_tlsgd O_md6 /* @tlsgd relocation. */ |
| 361 | #define O_tlsie O_md7 /* @tlsie relocation. */ |
| 362 | #define O_tpoff9 O_md8 /* @tpoff9 relocation. */ |
| 363 | #define O_tpoff O_md9 /* @tpoff relocation. */ |
| 364 | #define O_dtpoff9 O_md10 /* @dtpoff9 relocation. */ |
| 365 | #define O_dtpoff O_md11 /* @dtpoff relocation. */ |
| 366 | #define O_last O_dtpoff |
| 367 | |
| 368 | /* Used to define a bracket as operand in tokens. */ |
| 369 | #define O_bracket O_md32 |
| 370 | |
| 371 | /* Dummy relocation, to be sorted out. */ |
| 372 | #define DUMMY_RELOC_ARC_ENTRY (BFD_RELOC_UNUSED + 1) |
| 373 | |
| 374 | #define USER_RELOC_P(R) ((R) >= O_gotoff && (R) <= O_last) |
| 375 | |
| 376 | /* A table to map the spelling of a relocation operand into an appropriate |
| 377 | bfd_reloc_code_real_type type. The table is assumed to be ordered such |
| 378 | that op-O_literal indexes into it. */ |
| 379 | #define ARC_RELOC_TABLE(op) \ |
| 380 | (&arc_reloc_op[ ((!USER_RELOC_P (op)) \ |
| 381 | ? (abort (), 0) \ |
| 382 | : (int) (op) - (int) O_gotoff) ]) |
| 383 | |
| 384 | #define DEF(NAME, RELOC, REQ) \ |
| 385 | { #NAME, sizeof (#NAME)-1, O_##NAME, RELOC, REQ} |
| 386 | |
| 387 | static const struct arc_reloc_op_tag |
| 388 | { |
| 389 | /* String to lookup. */ |
| 390 | const char *name; |
| 391 | /* Size of the string. */ |
| 392 | size_t length; |
| 393 | /* Which operator to use. */ |
| 394 | operatorT op; |
| 395 | extended_bfd_reloc_code_real_type reloc; |
| 396 | /* Allows complex relocation expression like identifier@reloc + |
| 397 | const. */ |
| 398 | unsigned int complex_expr : 1; |
| 399 | } |
| 400 | arc_reloc_op[] = |
| 401 | { |
| 402 | DEF (gotoff, BFD_RELOC_ARC_GOTOFF, 1), |
| 403 | DEF (gotpc, BFD_RELOC_ARC_GOTPC32, 0), |
| 404 | DEF (plt, BFD_RELOC_ARC_PLT32, 0), |
| 405 | DEF (sda, DUMMY_RELOC_ARC_ENTRY, 1), |
| 406 | DEF (pcl, BFD_RELOC_ARC_PC32, 1), |
| 407 | DEF (tlsgd, BFD_RELOC_ARC_TLS_GD_GOT, 0), |
| 408 | DEF (tlsie, BFD_RELOC_ARC_TLS_IE_GOT, 0), |
| 409 | DEF (tpoff9, BFD_RELOC_ARC_TLS_LE_S9, 0), |
| 410 | DEF (tpoff, BFD_RELOC_ARC_TLS_LE_32, 1), |
| 411 | DEF (dtpoff9, BFD_RELOC_ARC_TLS_DTPOFF_S9, 0), |
| 412 | DEF (dtpoff, BFD_RELOC_ARC_TLS_DTPOFF, 0), |
| 413 | }; |
| 414 | |
| 415 | static const int arc_num_reloc_op |
| 416 | = sizeof (arc_reloc_op) / sizeof (*arc_reloc_op); |
| 417 | |
| 418 | /* Structure for relaxable instruction that have to be swapped with a |
| 419 | smaller alternative instruction. */ |
| 420 | struct arc_relaxable_ins |
| 421 | { |
| 422 | /* Mnemonic that should be checked. */ |
| 423 | const char *mnemonic_r; |
| 424 | |
| 425 | /* Operands that should be checked. |
| 426 | Indexes of operands from operand array. */ |
| 427 | enum rlx_operand_type operands[6]; |
| 428 | |
| 429 | /* Flags that should be checked. */ |
| 430 | unsigned flag_classes[5]; |
| 431 | |
| 432 | /* Mnemonic (smaller) alternative to be used later for relaxation. */ |
| 433 | const char *mnemonic_alt; |
| 434 | |
| 435 | /* Index of operand that generic relaxation has to check. */ |
| 436 | unsigned opcheckidx; |
| 437 | |
| 438 | /* Base subtype index used. */ |
| 439 | enum arc_rlx_types subtype; |
| 440 | }; |
| 441 | |
| 442 | #define RELAX_TABLE_ENTRY(BITS, ISSIGNED, SIZE, NEXT) \ |
| 443 | { (ISSIGNED) ? ((1 << ((BITS) - 1)) - 1) : ((1 << (BITS)) - 1), \ |
| 444 | (ISSIGNED) ? -(1 << ((BITS) - 1)) : 0, \ |
| 445 | (SIZE), \ |
| 446 | (NEXT) } \ |
| 447 | |
| 448 | #define RELAX_TABLE_ENTRY_MAX(ISSIGNED, SIZE, NEXT) \ |
| 449 | { (ISSIGNED) ? 0x7FFFFFFF : 0xFFFFFFFF, \ |
| 450 | (ISSIGNED) ? -(0x7FFFFFFF) : 0, \ |
| 451 | (SIZE), \ |
| 452 | (NEXT) } \ |
| 453 | |
| 454 | |
| 455 | /* ARC relaxation table. */ |
| 456 | const relax_typeS md_relax_table[] = |
| 457 | { |
| 458 | /* Fake entry. */ |
| 459 | {0, 0, 0, 0}, |
| 460 | |
| 461 | /* BL_S s13 -> |
| 462 | BL s25. */ |
| 463 | RELAX_TABLE_ENTRY(13, 1, 2, ARC_RLX_BL), |
| 464 | RELAX_TABLE_ENTRY(25, 1, 4, ARC_RLX_NONE), |
| 465 | |
| 466 | /* B_S s10 -> |
| 467 | B s25. */ |
| 468 | RELAX_TABLE_ENTRY(10, 1, 2, ARC_RLX_B), |
| 469 | RELAX_TABLE_ENTRY(25, 1, 4, ARC_RLX_NONE), |
| 470 | |
| 471 | /* ADD_S c,b, u3 -> |
| 472 | ADD<.f> a,b,u6 -> |
| 473 | ADD<.f> a,b,limm. */ |
| 474 | RELAX_TABLE_ENTRY(3, 0, 2, ARC_RLX_ADD_U6), |
| 475 | RELAX_TABLE_ENTRY(6, 0, 4, ARC_RLX_ADD_LIMM), |
| 476 | RELAX_TABLE_ENTRY_MAX(0, 8, ARC_RLX_NONE), |
| 477 | |
| 478 | /* LD_S a, [b, u7] -> |
| 479 | LD<zz><.x><.aa><.di> a, [b, s9] -> |
| 480 | LD<zz><.x><.aa><.di> a, [b, limm] */ |
| 481 | RELAX_TABLE_ENTRY(7, 0, 2, ARC_RLX_LD_S9), |
| 482 | RELAX_TABLE_ENTRY(9, 1, 4, ARC_RLX_LD_LIMM), |
| 483 | RELAX_TABLE_ENTRY_MAX(1, 8, ARC_RLX_NONE), |
| 484 | |
| 485 | /* MOV_S b, u8 -> |
| 486 | MOV<.f> b, s12 -> |
| 487 | MOV<.f> b, limm. */ |
| 488 | RELAX_TABLE_ENTRY(8, 0, 2, ARC_RLX_MOV_S12), |
| 489 | RELAX_TABLE_ENTRY(8, 0, 4, ARC_RLX_MOV_LIMM), |
| 490 | RELAX_TABLE_ENTRY_MAX(0, 8, ARC_RLX_NONE), |
| 491 | |
| 492 | /* SUB_S c, b, u3 -> |
| 493 | SUB<.f> a, b, u6 -> |
| 494 | SUB<.f> a, b, limm. */ |
| 495 | RELAX_TABLE_ENTRY(3, 0, 2, ARC_RLX_SUB_U6), |
| 496 | RELAX_TABLE_ENTRY(6, 0, 4, ARC_RLX_SUB_LIMM), |
| 497 | RELAX_TABLE_ENTRY_MAX(0, 8, ARC_RLX_NONE), |
| 498 | |
| 499 | /* MPY<.f> a, b, u6 -> |
| 500 | MPY<.f> a, b, limm. */ |
| 501 | RELAX_TABLE_ENTRY(6, 0, 4, ARC_RLX_MPY_LIMM), |
| 502 | RELAX_TABLE_ENTRY_MAX(0, 8, ARC_RLX_NONE), |
| 503 | |
| 504 | /* MOV<.f><.cc> b, u6 -> |
| 505 | MOV<.f><.cc> b, limm. */ |
| 506 | RELAX_TABLE_ENTRY(6, 0, 4, ARC_RLX_MOV_RLIMM), |
| 507 | RELAX_TABLE_ENTRY_MAX(0, 8, ARC_RLX_NONE), |
| 508 | |
| 509 | /* ADD<.f><.cc> b, b, u6 -> |
| 510 | ADD<.f><.cc> b, b, limm. */ |
| 511 | RELAX_TABLE_ENTRY(6, 0, 4, ARC_RLX_ADD_RRLIMM), |
| 512 | RELAX_TABLE_ENTRY_MAX(0, 8, ARC_RLX_NONE), |
| 513 | }; |
| 514 | |
| 515 | /* Order of this table's entries matters! */ |
| 516 | const struct arc_relaxable_ins arc_relaxable_insns[] = |
| 517 | { |
| 518 | { "bl", { IMMEDIATE }, { 0 }, "bl_s", 0, ARC_RLX_BL_S }, |
| 519 | { "b", { IMMEDIATE }, { 0 }, "b_s", 0, ARC_RLX_B_S }, |
| 520 | { "add", { REGISTER, REGISTER_DUP, IMMEDIATE }, { 5, 1, 0 }, "add", |
| 521 | 2, ARC_RLX_ADD_RRU6}, |
| 522 | { "add", { REGISTER_S, REGISTER_S, IMMEDIATE }, { 0 }, "add_s", 2, |
| 523 | ARC_RLX_ADD_U3 }, |
| 524 | { "add", { REGISTER, REGISTER, IMMEDIATE }, { 5, 0 }, "add", 2, |
| 525 | ARC_RLX_ADD_U6 }, |
| 526 | { "ld", { REGISTER_S, BRACKET, REGISTER_S, IMMEDIATE, BRACKET }, |
| 527 | { 0 }, "ld_s", 3, ARC_RLX_LD_U7 }, |
| 528 | { "ld", { REGISTER, BRACKET, REGISTER_NO_GP, IMMEDIATE, BRACKET }, |
| 529 | { 11, 4, 14, 17, 0 }, "ld", 3, ARC_RLX_LD_S9 }, |
| 530 | { "mov", { REGISTER_S, IMMEDIATE }, { 0 }, "mov_s", 1, ARC_RLX_MOV_U8 }, |
| 531 | { "mov", { REGISTER, IMMEDIATE }, { 5, 0 }, "mov", 1, ARC_RLX_MOV_S12 }, |
| 532 | { "mov", { REGISTER, IMMEDIATE }, { 5, 1, 0 },"mov", 1, ARC_RLX_MOV_RU6 }, |
| 533 | { "sub", { REGISTER_S, REGISTER_S, IMMEDIATE }, { 0 }, "sub_s", 2, |
| 534 | ARC_RLX_SUB_U3 }, |
| 535 | { "sub", { REGISTER, REGISTER, IMMEDIATE }, { 5, 0 }, "sub", 2, |
| 536 | ARC_RLX_SUB_U6 }, |
| 537 | { "mpy", { REGISTER, REGISTER, IMMEDIATE }, { 5, 0 }, "mpy", 2, |
| 538 | ARC_RLX_MPY_U6 }, |
| 539 | }; |
| 540 | |
| 541 | const unsigned arc_num_relaxable_ins = ARRAY_SIZE (arc_relaxable_insns); |
| 542 | |
| 543 | /* Flags to set in the elf header. */ |
| 544 | static flagword arc_eflag = 0x00; |
| 545 | |
| 546 | /* Pre-defined "_GLOBAL_OFFSET_TABLE_". */ |
| 547 | symbolS * GOT_symbol = 0; |
| 548 | |
| 549 | /* Set to TRUE when we assemble instructions. */ |
| 550 | static bfd_boolean assembling_insn = FALSE; |
| 551 | |
| 552 | /* Functions implementation. */ |
| 553 | |
| 554 | /* Like md_number_to_chars but used for limms. The 4-byte limm value, |
| 555 | is encoded as 'middle-endian' for a little-endian target. FIXME! |
| 556 | this function is used for regular 4 byte instructions as well. */ |
| 557 | |
| 558 | static void |
| 559 | md_number_to_chars_midend (char *buf, valueT val, int n) |
| 560 | { |
| 561 | if (n == 4) |
| 562 | { |
| 563 | md_number_to_chars (buf, (val & 0xffff0000) >> 16, 2); |
| 564 | md_number_to_chars (buf + 2, (val & 0xffff), 2); |
| 565 | } |
| 566 | else |
| 567 | { |
| 568 | md_number_to_chars (buf, val, n); |
| 569 | } |
| 570 | } |
| 571 | |
| 572 | /* Here ends all the ARCompact extension instruction assembling |
| 573 | stuff. */ |
| 574 | |
| 575 | static void |
| 576 | arc_extra_reloc (int r_type) |
| 577 | { |
| 578 | char *sym_name, c; |
| 579 | symbolS *sym, *lab = NULL; |
| 580 | |
| 581 | if (*input_line_pointer == '@') |
| 582 | input_line_pointer++; |
| 583 | c = get_symbol_name (&sym_name); |
| 584 | sym = symbol_find_or_make (sym_name); |
| 585 | restore_line_pointer (c); |
| 586 | if (c == ',' && r_type == BFD_RELOC_ARC_TLS_GD_LD) |
| 587 | { |
| 588 | ++input_line_pointer; |
| 589 | char *lab_name; |
| 590 | c = get_symbol_name (&lab_name); |
| 591 | lab = symbol_find_or_make (lab_name); |
| 592 | restore_line_pointer (c); |
| 593 | } |
| 594 | fixS *fixP |
| 595 | = fix_new (frag_now, /* Which frag? */ |
| 596 | frag_now_fix (), /* Where in that frag? */ |
| 597 | 2, /* size: 1, 2, or 4 usually. */ |
| 598 | sym, /* X_add_symbol. */ |
| 599 | 0, /* X_add_number. */ |
| 600 | FALSE, /* TRUE if PC-relative relocation. */ |
| 601 | r_type /* Relocation type. */); |
| 602 | fixP->fx_subsy = lab; |
| 603 | } |
| 604 | |
| 605 | static symbolS * |
| 606 | arc_lcomm_internal (int ignore ATTRIBUTE_UNUSED, |
| 607 | symbolS *symbolP, addressT size) |
| 608 | { |
| 609 | addressT align = 0; |
| 610 | SKIP_WHITESPACE (); |
| 611 | |
| 612 | if (*input_line_pointer == ',') |
| 613 | { |
| 614 | align = parse_align (1); |
| 615 | |
| 616 | if (align == (addressT) -1) |
| 617 | return NULL; |
| 618 | } |
| 619 | else |
| 620 | { |
| 621 | if (size >= 8) |
| 622 | align = 3; |
| 623 | else if (size >= 4) |
| 624 | align = 2; |
| 625 | else if (size >= 2) |
| 626 | align = 1; |
| 627 | else |
| 628 | align = 0; |
| 629 | } |
| 630 | |
| 631 | bss_alloc (symbolP, size, align); |
| 632 | S_CLEAR_EXTERNAL (symbolP); |
| 633 | |
| 634 | return symbolP; |
| 635 | } |
| 636 | |
| 637 | static void |
| 638 | arc_lcomm (int ignore) |
| 639 | { |
| 640 | symbolS *symbolP = s_comm_internal (ignore, arc_lcomm_internal); |
| 641 | |
| 642 | if (symbolP) |
| 643 | symbol_get_bfdsym (symbolP)->flags |= BSF_OBJECT; |
| 644 | } |
| 645 | |
| 646 | /* Select the cpu we're assembling for. */ |
| 647 | |
| 648 | static void |
| 649 | arc_option (int ignore ATTRIBUTE_UNUSED) |
| 650 | { |
| 651 | int mach = -1; |
| 652 | char c; |
| 653 | char *cpu; |
| 654 | |
| 655 | c = get_symbol_name (&cpu); |
| 656 | mach = arc_get_mach (cpu); |
| 657 | |
| 658 | if (mach == -1) |
| 659 | goto bad_cpu; |
| 660 | |
| 661 | if (!mach_type_specified_p) |
| 662 | { |
| 663 | if ((!strcmp ("ARC600", cpu)) |
| 664 | || (!strcmp ("ARC601", cpu)) |
| 665 | || (!strcmp ("A6", cpu))) |
| 666 | { |
| 667 | md_parse_option (OPTION_MCPU, "arc600"); |
| 668 | } |
| 669 | else if ((!strcmp ("ARC700", cpu)) |
| 670 | || (!strcmp ("A7", cpu))) |
| 671 | { |
| 672 | md_parse_option (OPTION_MCPU, "arc700"); |
| 673 | } |
| 674 | else if (!strcmp ("EM", cpu)) |
| 675 | { |
| 676 | md_parse_option (OPTION_MCPU, "arcem"); |
| 677 | } |
| 678 | else if (!strcmp ("HS", cpu)) |
| 679 | { |
| 680 | md_parse_option (OPTION_MCPU, "archs"); |
| 681 | } |
| 682 | else |
| 683 | as_fatal ("could not find the architecture"); |
| 684 | |
| 685 | if (!bfd_set_arch_mach (stdoutput, bfd_arch_arc, mach)) |
| 686 | as_fatal ("could not set architecture and machine"); |
| 687 | } |
| 688 | else |
| 689 | if (arc_mach_type != mach) |
| 690 | as_warn ("Command-line value overrides \".cpu\" directive"); |
| 691 | |
| 692 | restore_line_pointer (c); |
| 693 | demand_empty_rest_of_line (); |
| 694 | return; |
| 695 | |
| 696 | bad_cpu: |
| 697 | restore_line_pointer (c); |
| 698 | as_bad ("invalid identifier for \".cpu\""); |
| 699 | ignore_rest_of_line (); |
| 700 | } |
| 701 | |
| 702 | /* Smartly print an expression. */ |
| 703 | |
| 704 | static void |
| 705 | debug_exp (expressionS *t) |
| 706 | { |
| 707 | const char *name ATTRIBUTE_UNUSED; |
| 708 | const char *namemd ATTRIBUTE_UNUSED; |
| 709 | |
| 710 | pr_debug ("debug_exp: "); |
| 711 | |
| 712 | switch (t->X_op) |
| 713 | { |
| 714 | default: name = "unknown"; break; |
| 715 | case O_illegal: name = "O_illegal"; break; |
| 716 | case O_absent: name = "O_absent"; break; |
| 717 | case O_constant: name = "O_constant"; break; |
| 718 | case O_symbol: name = "O_symbol"; break; |
| 719 | case O_symbol_rva: name = "O_symbol_rva"; break; |
| 720 | case O_register: name = "O_register"; break; |
| 721 | case O_big: name = "O_big"; break; |
| 722 | case O_uminus: name = "O_uminus"; break; |
| 723 | case O_bit_not: name = "O_bit_not"; break; |
| 724 | case O_logical_not: name = "O_logical_not"; break; |
| 725 | case O_multiply: name = "O_multiply"; break; |
| 726 | case O_divide: name = "O_divide"; break; |
| 727 | case O_modulus: name = "O_modulus"; break; |
| 728 | case O_left_shift: name = "O_left_shift"; break; |
| 729 | case O_right_shift: name = "O_right_shift"; break; |
| 730 | case O_bit_inclusive_or: name = "O_bit_inclusive_or"; break; |
| 731 | case O_bit_or_not: name = "O_bit_or_not"; break; |
| 732 | case O_bit_exclusive_or: name = "O_bit_exclusive_or"; break; |
| 733 | case O_bit_and: name = "O_bit_and"; break; |
| 734 | case O_add: name = "O_add"; break; |
| 735 | case O_subtract: name = "O_subtract"; break; |
| 736 | case O_eq: name = "O_eq"; break; |
| 737 | case O_ne: name = "O_ne"; break; |
| 738 | case O_lt: name = "O_lt"; break; |
| 739 | case O_le: name = "O_le"; break; |
| 740 | case O_ge: name = "O_ge"; break; |
| 741 | case O_gt: name = "O_gt"; break; |
| 742 | case O_logical_and: name = "O_logical_and"; break; |
| 743 | case O_logical_or: name = "O_logical_or"; break; |
| 744 | case O_index: name = "O_index"; break; |
| 745 | case O_bracket: name = "O_bracket"; break; |
| 746 | } |
| 747 | |
| 748 | switch (t->X_md) |
| 749 | { |
| 750 | default: namemd = "unknown"; break; |
| 751 | case O_gotoff: namemd = "O_gotoff"; break; |
| 752 | case O_gotpc: namemd = "O_gotpc"; break; |
| 753 | case O_plt: namemd = "O_plt"; break; |
| 754 | case O_sda: namemd = "O_sda"; break; |
| 755 | case O_pcl: namemd = "O_pcl"; break; |
| 756 | case O_tlsgd: namemd = "O_tlsgd"; break; |
| 757 | case O_tlsie: namemd = "O_tlsie"; break; |
| 758 | case O_tpoff9: namemd = "O_tpoff9"; break; |
| 759 | case O_tpoff: namemd = "O_tpoff"; break; |
| 760 | case O_dtpoff9: namemd = "O_dtpoff9"; break; |
| 761 | case O_dtpoff: namemd = "O_dtpoff"; break; |
| 762 | } |
| 763 | |
| 764 | pr_debug ("%s (%s, %s, %d, %s)", name, |
| 765 | (t->X_add_symbol) ? S_GET_NAME (t->X_add_symbol) : "--", |
| 766 | (t->X_op_symbol) ? S_GET_NAME (t->X_op_symbol) : "--", |
| 767 | (int) t->X_add_number, |
| 768 | (t->X_md) ? namemd : "--"); |
| 769 | pr_debug ("\n"); |
| 770 | fflush (stderr); |
| 771 | } |
| 772 | |
| 773 | /* Parse the arguments to an opcode. */ |
| 774 | |
| 775 | static int |
| 776 | tokenize_arguments (char *str, |
| 777 | expressionS *tok, |
| 778 | int ntok) |
| 779 | { |
| 780 | char *old_input_line_pointer; |
| 781 | bfd_boolean saw_comma = FALSE; |
| 782 | bfd_boolean saw_arg = FALSE; |
| 783 | int brk_lvl = 0; |
| 784 | int num_args = 0; |
| 785 | int i; |
| 786 | size_t len; |
| 787 | const struct arc_reloc_op_tag *r; |
| 788 | expressionS tmpE; |
| 789 | char *reloc_name, c; |
| 790 | |
| 791 | memset (tok, 0, sizeof (*tok) * ntok); |
| 792 | |
| 793 | /* Save and restore input_line_pointer around this function. */ |
| 794 | old_input_line_pointer = input_line_pointer; |
| 795 | input_line_pointer = str; |
| 796 | |
| 797 | while (*input_line_pointer) |
| 798 | { |
| 799 | SKIP_WHITESPACE (); |
| 800 | switch (*input_line_pointer) |
| 801 | { |
| 802 | case '\0': |
| 803 | goto fini; |
| 804 | |
| 805 | case ',': |
| 806 | input_line_pointer++; |
| 807 | if (saw_comma || !saw_arg) |
| 808 | goto err; |
| 809 | saw_comma = TRUE; |
| 810 | break; |
| 811 | |
| 812 | case '}': |
| 813 | case ']': |
| 814 | ++input_line_pointer; |
| 815 | --brk_lvl; |
| 816 | if (!saw_arg) |
| 817 | goto err; |
| 818 | tok->X_op = O_bracket; |
| 819 | ++tok; |
| 820 | ++num_args; |
| 821 | break; |
| 822 | |
| 823 | case '{': |
| 824 | case '[': |
| 825 | input_line_pointer++; |
| 826 | if (brk_lvl) |
| 827 | goto err; |
| 828 | ++brk_lvl; |
| 829 | tok->X_op = O_bracket; |
| 830 | ++tok; |
| 831 | ++num_args; |
| 832 | break; |
| 833 | |
| 834 | case '@': |
| 835 | /* We have labels, function names and relocations, all |
| 836 | starting with @ symbol. Sort them out. */ |
| 837 | if (saw_arg && !saw_comma) |
| 838 | goto err; |
| 839 | |
| 840 | /* Parse @label. */ |
| 841 | tok->X_op = O_symbol; |
| 842 | tok->X_md = O_absent; |
| 843 | expression (tok); |
| 844 | if (*input_line_pointer != '@') |
| 845 | goto normalsymbol; /* This is not a relocation. */ |
| 846 | |
| 847 | relocationsym: |
| 848 | |
| 849 | /* A relocation opernad has the following form |
| 850 | @identifier@relocation_type. The identifier is already |
| 851 | in tok! */ |
| 852 | if (tok->X_op != O_symbol) |
| 853 | { |
| 854 | as_bad (_("No valid label relocation operand")); |
| 855 | goto err; |
| 856 | } |
| 857 | |
| 858 | /* Parse @relocation_type. */ |
| 859 | input_line_pointer++; |
| 860 | c = get_symbol_name (&reloc_name); |
| 861 | len = input_line_pointer - reloc_name; |
| 862 | if (len == 0) |
| 863 | { |
| 864 | as_bad (_("No relocation operand")); |
| 865 | goto err; |
| 866 | } |
| 867 | |
| 868 | /* Go through known relocation and try to find a match. */ |
| 869 | r = &arc_reloc_op[0]; |
| 870 | for (i = arc_num_reloc_op - 1; i >= 0; i--, r++) |
| 871 | if (len == r->length |
| 872 | && memcmp (reloc_name, r->name, len) == 0) |
| 873 | break; |
| 874 | if (i < 0) |
| 875 | { |
| 876 | as_bad (_("Unknown relocation operand: @%s"), reloc_name); |
| 877 | goto err; |
| 878 | } |
| 879 | |
| 880 | *input_line_pointer = c; |
| 881 | SKIP_WHITESPACE_AFTER_NAME (); |
| 882 | /* Extra check for TLS: base. */ |
| 883 | if (*input_line_pointer == '@') |
| 884 | { |
| 885 | symbolS *base; |
| 886 | if (tok->X_op_symbol != NULL |
| 887 | || tok->X_op != O_symbol) |
| 888 | { |
| 889 | as_bad (_("Unable to parse TLS base: %s"), |
| 890 | input_line_pointer); |
| 891 | goto err; |
| 892 | } |
| 893 | input_line_pointer++; |
| 894 | char *sym_name; |
| 895 | c = get_symbol_name (&sym_name); |
| 896 | base = symbol_find_or_make (sym_name); |
| 897 | tok->X_op = O_subtract; |
| 898 | tok->X_op_symbol = base; |
| 899 | restore_line_pointer (c); |
| 900 | tmpE.X_add_number = 0; |
| 901 | } |
| 902 | else if ((*input_line_pointer != '+') |
| 903 | && (*input_line_pointer != '-')) |
| 904 | { |
| 905 | tmpE.X_add_number = 0; |
| 906 | } |
| 907 | else |
| 908 | { |
| 909 | /* Parse the constant of a complex relocation expression |
| 910 | like @identifier@reloc +/- const. */ |
| 911 | if (! r->complex_expr) |
| 912 | { |
| 913 | as_bad (_("@%s is not a complex relocation."), r->name); |
| 914 | goto err; |
| 915 | } |
| 916 | expression (&tmpE); |
| 917 | if (tmpE.X_op != O_constant) |
| 918 | { |
| 919 | as_bad (_("Bad expression: @%s + %s."), |
| 920 | r->name, input_line_pointer); |
| 921 | goto err; |
| 922 | } |
| 923 | } |
| 924 | |
| 925 | tok->X_md = r->op; |
| 926 | tok->X_add_number = tmpE.X_add_number; |
| 927 | |
| 928 | debug_exp (tok); |
| 929 | |
| 930 | saw_comma = FALSE; |
| 931 | saw_arg = TRUE; |
| 932 | tok++; |
| 933 | num_args++; |
| 934 | break; |
| 935 | |
| 936 | case '%': |
| 937 | /* Can be a register. */ |
| 938 | ++input_line_pointer; |
| 939 | /* Fall through. */ |
| 940 | default: |
| 941 | |
| 942 | if (saw_arg && !saw_comma) |
| 943 | goto err; |
| 944 | |
| 945 | tok->X_op = O_absent; |
| 946 | tok->X_md = O_absent; |
| 947 | expression (tok); |
| 948 | |
| 949 | /* Legacy: There are cases when we have |
| 950 | identifier@relocation_type, if it is the case parse the |
| 951 | relocation type as well. */ |
| 952 | if (*input_line_pointer == '@') |
| 953 | goto relocationsym; |
| 954 | |
| 955 | normalsymbol: |
| 956 | debug_exp (tok); |
| 957 | |
| 958 | if (tok->X_op == O_illegal || tok->X_op == O_absent) |
| 959 | goto err; |
| 960 | |
| 961 | saw_comma = FALSE; |
| 962 | saw_arg = TRUE; |
| 963 | tok++; |
| 964 | num_args++; |
| 965 | break; |
| 966 | } |
| 967 | } |
| 968 | |
| 969 | fini: |
| 970 | if (saw_comma || brk_lvl) |
| 971 | goto err; |
| 972 | input_line_pointer = old_input_line_pointer; |
| 973 | |
| 974 | return num_args; |
| 975 | |
| 976 | err: |
| 977 | if (brk_lvl) |
| 978 | as_bad (_("Brackets in operand field incorrect")); |
| 979 | else if (saw_comma) |
| 980 | as_bad (_("extra comma")); |
| 981 | else if (!saw_arg) |
| 982 | as_bad (_("missing argument")); |
| 983 | else |
| 984 | as_bad (_("missing comma or colon")); |
| 985 | input_line_pointer = old_input_line_pointer; |
| 986 | return -1; |
| 987 | } |
| 988 | |
| 989 | /* Parse the flags to a structure. */ |
| 990 | |
| 991 | static int |
| 992 | tokenize_flags (const char *str, |
| 993 | struct arc_flags flags[], |
| 994 | int nflg) |
| 995 | { |
| 996 | char *old_input_line_pointer; |
| 997 | bfd_boolean saw_flg = FALSE; |
| 998 | bfd_boolean saw_dot = FALSE; |
| 999 | int num_flags = 0; |
| 1000 | size_t flgnamelen; |
| 1001 | |
| 1002 | memset (flags, 0, sizeof (*flags) * nflg); |
| 1003 | |
| 1004 | /* Save and restore input_line_pointer around this function. */ |
| 1005 | old_input_line_pointer = input_line_pointer; |
| 1006 | input_line_pointer = (char *) str; |
| 1007 | |
| 1008 | while (*input_line_pointer) |
| 1009 | { |
| 1010 | switch (*input_line_pointer) |
| 1011 | { |
| 1012 | case ' ': |
| 1013 | case '\0': |
| 1014 | goto fini; |
| 1015 | |
| 1016 | case '.': |
| 1017 | input_line_pointer++; |
| 1018 | if (saw_dot) |
| 1019 | goto err; |
| 1020 | saw_dot = TRUE; |
| 1021 | saw_flg = FALSE; |
| 1022 | break; |
| 1023 | |
| 1024 | default: |
| 1025 | if (saw_flg && !saw_dot) |
| 1026 | goto err; |
| 1027 | |
| 1028 | if (num_flags >= nflg) |
| 1029 | goto err; |
| 1030 | |
| 1031 | flgnamelen = strspn (input_line_pointer, "abcdefghilmnopqrstvwxz"); |
| 1032 | if (flgnamelen > MAX_FLAG_NAME_LENGHT) |
| 1033 | goto err; |
| 1034 | |
| 1035 | memcpy (flags->name, input_line_pointer, flgnamelen); |
| 1036 | |
| 1037 | input_line_pointer += flgnamelen; |
| 1038 | flags++; |
| 1039 | saw_dot = FALSE; |
| 1040 | saw_flg = TRUE; |
| 1041 | num_flags++; |
| 1042 | break; |
| 1043 | } |
| 1044 | } |
| 1045 | |
| 1046 | fini: |
| 1047 | input_line_pointer = old_input_line_pointer; |
| 1048 | return num_flags; |
| 1049 | |
| 1050 | err: |
| 1051 | if (saw_dot) |
| 1052 | as_bad (_("extra dot")); |
| 1053 | else if (!saw_flg) |
| 1054 | as_bad (_("unrecognized flag")); |
| 1055 | else |
| 1056 | as_bad (_("failed to parse flags")); |
| 1057 | input_line_pointer = old_input_line_pointer; |
| 1058 | return -1; |
| 1059 | } |
| 1060 | |
| 1061 | /* Apply the fixups in order. */ |
| 1062 | |
| 1063 | static void |
| 1064 | apply_fixups (struct arc_insn *insn, fragS *fragP, int fix) |
| 1065 | { |
| 1066 | int i; |
| 1067 | |
| 1068 | for (i = 0; i < insn->nfixups; i++) |
| 1069 | { |
| 1070 | struct arc_fixup *fixup = &insn->fixups[i]; |
| 1071 | int size, pcrel, offset = 0; |
| 1072 | |
| 1073 | /* FIXME! the reloc size is wrong in the BFD file. |
| 1074 | When it is fixed please delete me. */ |
| 1075 | size = (insn->short_insn && !fixup->islong) ? 2 : 4; |
| 1076 | |
| 1077 | if (fixup->islong) |
| 1078 | offset = (insn->short_insn) ? 2 : 4; |
| 1079 | |
| 1080 | /* Some fixups are only used internally, thus no howto. */ |
| 1081 | if ((int) fixup->reloc == 0) |
| 1082 | as_fatal (_("Unhandled reloc type")); |
| 1083 | |
| 1084 | if ((int) fixup->reloc < 0) |
| 1085 | { |
| 1086 | /* FIXME! the reloc size is wrong in the BFD file. |
| 1087 | When it is fixed please enable me. |
| 1088 | size = (insn->short_insn && !fixup->islong) ? 2 : 4; */ |
| 1089 | pcrel = fixup->pcrel; |
| 1090 | } |
| 1091 | else |
| 1092 | { |
| 1093 | reloc_howto_type *reloc_howto = |
| 1094 | bfd_reloc_type_lookup (stdoutput, |
| 1095 | (bfd_reloc_code_real_type) fixup->reloc); |
| 1096 | gas_assert (reloc_howto); |
| 1097 | |
| 1098 | /* FIXME! the reloc size is wrong in the BFD file. |
| 1099 | When it is fixed please enable me. |
| 1100 | size = bfd_get_reloc_size (reloc_howto); */ |
| 1101 | pcrel = reloc_howto->pc_relative; |
| 1102 | } |
| 1103 | |
| 1104 | pr_debug ("%s:%d: apply_fixups: new %s fixup (PCrel:%s) of size %d @ \ |
| 1105 | offset %d + %d\n", |
| 1106 | fragP->fr_file, fragP->fr_line, |
| 1107 | (fixup->reloc < 0) ? "Internal" : |
| 1108 | bfd_get_reloc_code_name (fixup->reloc), |
| 1109 | pcrel ? "Y" : "N", |
| 1110 | size, fix, offset); |
| 1111 | fix_new_exp (fragP, fix + offset, |
| 1112 | size, &fixup->exp, pcrel, fixup->reloc); |
| 1113 | |
| 1114 | /* Check for ZOLs, and update symbol info if any. */ |
| 1115 | if (LP_INSN (insn->insn)) |
| 1116 | { |
| 1117 | gas_assert (fixup->exp.X_add_symbol); |
| 1118 | ARC_SET_FLAG (fixup->exp.X_add_symbol, ARC_FLAG_ZOL); |
| 1119 | } |
| 1120 | } |
| 1121 | } |
| 1122 | |
| 1123 | /* Actually output an instruction with its fixup. */ |
| 1124 | |
| 1125 | static void |
| 1126 | emit_insn0 (struct arc_insn *insn, char *where, bfd_boolean relax) |
| 1127 | { |
| 1128 | char *f = where; |
| 1129 | |
| 1130 | pr_debug ("Emit insn : 0x%x\n", insn->insn); |
| 1131 | pr_debug ("\tShort : 0x%d\n", insn->short_insn); |
| 1132 | pr_debug ("\tLong imm: 0x%lx\n", insn->limm); |
| 1133 | |
| 1134 | /* Write out the instruction. */ |
| 1135 | if (insn->short_insn) |
| 1136 | { |
| 1137 | if (insn->has_limm) |
| 1138 | { |
| 1139 | if (!relax) |
| 1140 | f = frag_more (6); |
| 1141 | md_number_to_chars (f, insn->insn, 2); |
| 1142 | md_number_to_chars_midend (f + 2, insn->limm, 4); |
| 1143 | dwarf2_emit_insn (6); |
| 1144 | } |
| 1145 | else |
| 1146 | { |
| 1147 | if (!relax) |
| 1148 | f = frag_more (2); |
| 1149 | md_number_to_chars (f, insn->insn, 2); |
| 1150 | dwarf2_emit_insn (2); |
| 1151 | } |
| 1152 | } |
| 1153 | else |
| 1154 | { |
| 1155 | if (insn->has_limm) |
| 1156 | { |
| 1157 | if (!relax) |
| 1158 | f = frag_more (8); |
| 1159 | md_number_to_chars_midend (f, insn->insn, 4); |
| 1160 | md_number_to_chars_midend (f + 4, insn->limm, 4); |
| 1161 | dwarf2_emit_insn (8); |
| 1162 | } |
| 1163 | else |
| 1164 | { |
| 1165 | if (!relax) |
| 1166 | f = frag_more (4); |
| 1167 | md_number_to_chars_midend (f, insn->insn, 4); |
| 1168 | dwarf2_emit_insn (4); |
| 1169 | } |
| 1170 | } |
| 1171 | |
| 1172 | if (!relax) |
| 1173 | apply_fixups (insn, frag_now, (f - frag_now->fr_literal)); |
| 1174 | } |
| 1175 | |
| 1176 | static void |
| 1177 | emit_insn1 (struct arc_insn *insn) |
| 1178 | { |
| 1179 | /* How frag_var's args are currently configured: |
| 1180 | - rs_machine_dependent, to dictate it's a relaxation frag. |
| 1181 | - FRAG_MAX_GROWTH, maximum size of instruction |
| 1182 | - 0, variable size that might grow...unused by generic relaxation. |
| 1183 | - frag_now->fr_subtype, fr_subtype starting value, set previously. |
| 1184 | - s, opand expression. |
| 1185 | - 0, offset but it's unused. |
| 1186 | - 0, opcode but it's unused. */ |
| 1187 | symbolS *s = make_expr_symbol (&insn->fixups[0].exp); |
| 1188 | frag_now->tc_frag_data.pcrel = insn->fixups[0].pcrel; |
| 1189 | |
| 1190 | if (frag_room () < FRAG_MAX_GROWTH) |
| 1191 | { |
| 1192 | /* Handle differently when frag literal memory is exhausted. |
| 1193 | This is used because when there's not enough memory left in |
| 1194 | the current frag, a new frag is created and the information |
| 1195 | we put into frag_now->tc_frag_data is disregarded. */ |
| 1196 | |
| 1197 | struct arc_relax_type relax_info_copy; |
| 1198 | relax_substateT subtype = frag_now->fr_subtype; |
| 1199 | |
| 1200 | memcpy (&relax_info_copy, &frag_now->tc_frag_data, |
| 1201 | sizeof (struct arc_relax_type)); |
| 1202 | |
| 1203 | frag_wane (frag_now); |
| 1204 | frag_grow (FRAG_MAX_GROWTH); |
| 1205 | |
| 1206 | memcpy (&frag_now->tc_frag_data, &relax_info_copy, |
| 1207 | sizeof (struct arc_relax_type)); |
| 1208 | |
| 1209 | frag_var (rs_machine_dependent, FRAG_MAX_GROWTH, 0, |
| 1210 | subtype, s, 0, 0); |
| 1211 | } |
| 1212 | else |
| 1213 | frag_var (rs_machine_dependent, FRAG_MAX_GROWTH, 0, |
| 1214 | frag_now->fr_subtype, s, 0, 0); |
| 1215 | } |
| 1216 | |
| 1217 | static void |
| 1218 | emit_insn (struct arc_insn *insn) |
| 1219 | { |
| 1220 | if (insn->relax) |
| 1221 | emit_insn1 (insn); |
| 1222 | else |
| 1223 | emit_insn0 (insn, NULL, FALSE); |
| 1224 | } |
| 1225 | |
| 1226 | /* Check whether a symbol involves a register. */ |
| 1227 | |
| 1228 | static bfd_boolean |
| 1229 | contains_register (symbolS *sym) |
| 1230 | { |
| 1231 | if (sym) |
| 1232 | { |
| 1233 | expressionS *ex = symbol_get_value_expression (sym); |
| 1234 | |
| 1235 | return ((O_register == ex->X_op) |
| 1236 | && !contains_register (ex->X_add_symbol) |
| 1237 | && !contains_register (ex->X_op_symbol)); |
| 1238 | } |
| 1239 | |
| 1240 | return FALSE; |
| 1241 | } |
| 1242 | |
| 1243 | /* Returns the register number within a symbol. */ |
| 1244 | |
| 1245 | static int |
| 1246 | get_register (symbolS *sym) |
| 1247 | { |
| 1248 | if (!contains_register (sym)) |
| 1249 | return -1; |
| 1250 | |
| 1251 | expressionS *ex = symbol_get_value_expression (sym); |
| 1252 | return regno (ex->X_add_number); |
| 1253 | } |
| 1254 | |
| 1255 | /* Return true if a RELOC is generic. A generic reloc is PC-rel of a |
| 1256 | simple ME relocation (e.g. RELOC_ARC_32_ME, BFD_RELOC_ARC_PC32. */ |
| 1257 | |
| 1258 | static bfd_boolean |
| 1259 | generic_reloc_p (extended_bfd_reloc_code_real_type reloc) |
| 1260 | { |
| 1261 | if (!reloc) |
| 1262 | return FALSE; |
| 1263 | |
| 1264 | switch (reloc) |
| 1265 | { |
| 1266 | case BFD_RELOC_ARC_SDA_LDST: |
| 1267 | case BFD_RELOC_ARC_SDA_LDST1: |
| 1268 | case BFD_RELOC_ARC_SDA_LDST2: |
| 1269 | case BFD_RELOC_ARC_SDA16_LD: |
| 1270 | case BFD_RELOC_ARC_SDA16_LD1: |
| 1271 | case BFD_RELOC_ARC_SDA16_LD2: |
| 1272 | case BFD_RELOC_ARC_SDA16_ST2: |
| 1273 | case BFD_RELOC_ARC_SDA32_ME: |
| 1274 | return FALSE; |
| 1275 | default: |
| 1276 | return TRUE; |
| 1277 | } |
| 1278 | } |
| 1279 | |
| 1280 | /* Allocates a tok entry. */ |
| 1281 | |
| 1282 | static int |
| 1283 | allocate_tok (expressionS *tok, int ntok, int cidx) |
| 1284 | { |
| 1285 | if (ntok > MAX_INSN_ARGS - 2) |
| 1286 | return 0; /* No space left. */ |
| 1287 | |
| 1288 | if (cidx > ntok) |
| 1289 | return 0; /* Incorect args. */ |
| 1290 | |
| 1291 | memcpy (&tok[ntok+1], &tok[ntok], sizeof (*tok)); |
| 1292 | |
| 1293 | if (cidx == ntok) |
| 1294 | return 1; /* Success. */ |
| 1295 | return allocate_tok (tok, ntok - 1, cidx); |
| 1296 | } |
| 1297 | |
| 1298 | /* Search forward through all variants of an opcode looking for a |
| 1299 | syntax match. */ |
| 1300 | |
| 1301 | static const struct arc_opcode * |
| 1302 | find_opcode_match (const struct arc_opcode *first_opcode, |
| 1303 | expressionS *tok, |
| 1304 | int *pntok, |
| 1305 | struct arc_flags *first_pflag, |
| 1306 | int nflgs, |
| 1307 | int *pcpumatch) |
| 1308 | { |
| 1309 | const struct arc_opcode *opcode = first_opcode; |
| 1310 | int ntok = *pntok; |
| 1311 | int got_cpu_match = 0; |
| 1312 | expressionS bktok[MAX_INSN_ARGS]; |
| 1313 | int bkntok; |
| 1314 | expressionS emptyE; |
| 1315 | |
| 1316 | memset (&emptyE, 0, sizeof (emptyE)); |
| 1317 | memcpy (bktok, tok, MAX_INSN_ARGS * sizeof (*tok)); |
| 1318 | bkntok = ntok; |
| 1319 | |
| 1320 | do |
| 1321 | { |
| 1322 | const unsigned char *opidx; |
| 1323 | const unsigned char *flgidx; |
| 1324 | int tokidx = 0; |
| 1325 | const expressionS *t = &emptyE; |
| 1326 | |
| 1327 | pr_debug ("%s:%d: find_opcode_match: trying opcode 0x%08X ", |
| 1328 | frag_now->fr_file, frag_now->fr_line, opcode->opcode); |
| 1329 | |
| 1330 | /* Don't match opcodes that don't exist on this |
| 1331 | architecture. */ |
| 1332 | if (!(opcode->cpu & arc_target)) |
| 1333 | goto match_failed; |
| 1334 | |
| 1335 | if (is_code_density_p (opcode) && !(arc_features & ARC_CD)) |
| 1336 | goto match_failed; |
| 1337 | |
| 1338 | got_cpu_match = 1; |
| 1339 | pr_debug ("cpu "); |
| 1340 | |
| 1341 | /* Check the operands. */ |
| 1342 | for (opidx = opcode->operands; *opidx; ++opidx) |
| 1343 | { |
| 1344 | const struct arc_operand *operand = &arc_operands[*opidx]; |
| 1345 | |
| 1346 | /* Only take input from real operands. */ |
| 1347 | if ((operand->flags & ARC_OPERAND_FAKE) |
| 1348 | && !(operand->flags & ARC_OPERAND_BRAKET)) |
| 1349 | continue; |
| 1350 | |
| 1351 | /* When we expect input, make sure we have it. */ |
| 1352 | if (tokidx >= ntok) |
| 1353 | goto match_failed; |
| 1354 | |
| 1355 | /* Match operand type with expression type. */ |
| 1356 | switch (operand->flags & ARC_OPERAND_TYPECHECK_MASK) |
| 1357 | { |
| 1358 | case ARC_OPERAND_IR: |
| 1359 | /* Check to be a register. */ |
| 1360 | if ((tok[tokidx].X_op != O_register |
| 1361 | || !is_ir_num (tok[tokidx].X_add_number)) |
| 1362 | && !(operand->flags & ARC_OPERAND_IGNORE)) |
| 1363 | goto match_failed; |
| 1364 | |
| 1365 | /* If expect duplicate, make sure it is duplicate. */ |
| 1366 | if (operand->flags & ARC_OPERAND_DUPLICATE) |
| 1367 | { |
| 1368 | /* Check for duplicate. */ |
| 1369 | if (t->X_op != O_register |
| 1370 | || !is_ir_num (t->X_add_number) |
| 1371 | || (regno (t->X_add_number) != |
| 1372 | regno (tok[tokidx].X_add_number))) |
| 1373 | goto match_failed; |
| 1374 | } |
| 1375 | |
| 1376 | /* Special handling? */ |
| 1377 | if (operand->insert) |
| 1378 | { |
| 1379 | const char *errmsg = NULL; |
| 1380 | (*operand->insert)(0, |
| 1381 | regno (tok[tokidx].X_add_number), |
| 1382 | &errmsg); |
| 1383 | if (errmsg) |
| 1384 | { |
| 1385 | if (operand->flags & ARC_OPERAND_IGNORE) |
| 1386 | { |
| 1387 | /* Missing argument, create one. */ |
| 1388 | if (!allocate_tok (tok, ntok - 1, tokidx)) |
| 1389 | goto match_failed; |
| 1390 | |
| 1391 | tok[tokidx].X_op = O_absent; |
| 1392 | ++ntok; |
| 1393 | } |
| 1394 | else |
| 1395 | goto match_failed; |
| 1396 | } |
| 1397 | } |
| 1398 | |
| 1399 | t = &tok[tokidx]; |
| 1400 | break; |
| 1401 | |
| 1402 | case ARC_OPERAND_BRAKET: |
| 1403 | /* Check if bracket is also in opcode table as |
| 1404 | operand. */ |
| 1405 | if (tok[tokidx].X_op != O_bracket) |
| 1406 | goto match_failed; |
| 1407 | break; |
| 1408 | |
| 1409 | case ARC_OPERAND_LIMM: |
| 1410 | case ARC_OPERAND_SIGNED: |
| 1411 | case ARC_OPERAND_UNSIGNED: |
| 1412 | switch (tok[tokidx].X_op) |
| 1413 | { |
| 1414 | case O_illegal: |
| 1415 | case O_absent: |
| 1416 | case O_register: |
| 1417 | goto match_failed; |
| 1418 | |
| 1419 | case O_bracket: |
| 1420 | /* Got an (too) early bracket, check if it is an |
| 1421 | ignored operand. N.B. This procedure works only |
| 1422 | when bracket is the last operand! */ |
| 1423 | if (!(operand->flags & ARC_OPERAND_IGNORE)) |
| 1424 | goto match_failed; |
| 1425 | /* Insert the missing operand. */ |
| 1426 | if (!allocate_tok (tok, ntok - 1, tokidx)) |
| 1427 | goto match_failed; |
| 1428 | |
| 1429 | tok[tokidx].X_op = O_absent; |
| 1430 | ++ntok; |
| 1431 | break; |
| 1432 | |
| 1433 | case O_constant: |
| 1434 | /* Check the range. */ |
| 1435 | if (operand->bits != 32 |
| 1436 | && !(operand->flags & ARC_OPERAND_NCHK)) |
| 1437 | { |
| 1438 | offsetT min, max, val; |
| 1439 | val = tok[tokidx].X_add_number; |
| 1440 | |
| 1441 | if (operand->flags & ARC_OPERAND_SIGNED) |
| 1442 | { |
| 1443 | max = (1 << (operand->bits - 1)) - 1; |
| 1444 | min = -(1 << (operand->bits - 1)); |
| 1445 | } |
| 1446 | else |
| 1447 | { |
| 1448 | max = (1 << operand->bits) - 1; |
| 1449 | min = 0; |
| 1450 | } |
| 1451 | |
| 1452 | if (val < min || val > max) |
| 1453 | goto match_failed; |
| 1454 | |
| 1455 | /* Check alignmets. */ |
| 1456 | if ((operand->flags & ARC_OPERAND_ALIGNED32) |
| 1457 | && (val & 0x03)) |
| 1458 | goto match_failed; |
| 1459 | |
| 1460 | if ((operand->flags & ARC_OPERAND_ALIGNED16) |
| 1461 | && (val & 0x01)) |
| 1462 | goto match_failed; |
| 1463 | } |
| 1464 | else if (operand->flags & ARC_OPERAND_NCHK) |
| 1465 | { |
| 1466 | if (operand->insert) |
| 1467 | { |
| 1468 | const char *errmsg = NULL; |
| 1469 | (*operand->insert)(0, |
| 1470 | tok[tokidx].X_add_number, |
| 1471 | &errmsg); |
| 1472 | if (errmsg) |
| 1473 | goto match_failed; |
| 1474 | } |
| 1475 | else |
| 1476 | goto match_failed; |
| 1477 | } |
| 1478 | break; |
| 1479 | |
| 1480 | case O_subtract: |
| 1481 | /* Check if it is register range. */ |
| 1482 | if ((tok[tokidx].X_add_number == 0) |
| 1483 | && contains_register (tok[tokidx].X_add_symbol) |
| 1484 | && contains_register (tok[tokidx].X_op_symbol)) |
| 1485 | { |
| 1486 | int regs; |
| 1487 | |
| 1488 | regs = get_register (tok[tokidx].X_add_symbol); |
| 1489 | regs <<= 16; |
| 1490 | regs |= get_register (tok[tokidx].X_op_symbol); |
| 1491 | if (operand->insert) |
| 1492 | { |
| 1493 | const char *errmsg = NULL; |
| 1494 | (*operand->insert)(0, |
| 1495 | regs, |
| 1496 | &errmsg); |
| 1497 | if (errmsg) |
| 1498 | goto match_failed; |
| 1499 | } |
| 1500 | else |
| 1501 | goto match_failed; |
| 1502 | break; |
| 1503 | } |
| 1504 | default: |
| 1505 | if (operand->default_reloc == 0) |
| 1506 | goto match_failed; /* The operand needs relocation. */ |
| 1507 | |
| 1508 | /* Relocs requiring long immediate. FIXME! make it |
| 1509 | generic and move it to a function. */ |
| 1510 | switch (tok[tokidx].X_md) |
| 1511 | { |
| 1512 | case O_gotoff: |
| 1513 | case O_gotpc: |
| 1514 | case O_pcl: |
| 1515 | case O_tpoff: |
| 1516 | case O_dtpoff: |
| 1517 | case O_tlsgd: |
| 1518 | case O_tlsie: |
| 1519 | if (!(operand->flags & ARC_OPERAND_LIMM)) |
| 1520 | goto match_failed; |
| 1521 | case O_absent: |
| 1522 | if (!generic_reloc_p (operand->default_reloc)) |
| 1523 | goto match_failed; |
| 1524 | default: |
| 1525 | break; |
| 1526 | } |
| 1527 | break; |
| 1528 | } |
| 1529 | /* If expect duplicate, make sure it is duplicate. */ |
| 1530 | if (operand->flags & ARC_OPERAND_DUPLICATE) |
| 1531 | { |
| 1532 | if (t->X_op == O_illegal |
| 1533 | || t->X_op == O_absent |
| 1534 | || t->X_op == O_register |
| 1535 | || (t->X_add_number != tok[tokidx].X_add_number)) |
| 1536 | goto match_failed; |
| 1537 | } |
| 1538 | t = &tok[tokidx]; |
| 1539 | break; |
| 1540 | |
| 1541 | default: |
| 1542 | /* Everything else should have been fake. */ |
| 1543 | abort (); |
| 1544 | } |
| 1545 | |
| 1546 | ++tokidx; |
| 1547 | } |
| 1548 | pr_debug ("opr "); |
| 1549 | |
| 1550 | /* Check the flags. Iterate over the valid flag classes. */ |
| 1551 | int lnflg = nflgs; |
| 1552 | |
| 1553 | for (flgidx = opcode->flags; *flgidx && lnflg; ++flgidx) |
| 1554 | { |
| 1555 | /* Get a valid flag class. */ |
| 1556 | const struct arc_flag_class *cl_flags = &arc_flag_classes[*flgidx]; |
| 1557 | const unsigned *flgopridx; |
| 1558 | |
| 1559 | for (flgopridx = cl_flags->flags; *flgopridx; ++flgopridx) |
| 1560 | { |
| 1561 | const struct arc_flag_operand *flg_operand; |
| 1562 | struct arc_flags *pflag = first_pflag; |
| 1563 | int i; |
| 1564 | |
| 1565 | flg_operand = &arc_flag_operands[*flgopridx]; |
| 1566 | for (i = 0; i < nflgs; i++, pflag++) |
| 1567 | { |
| 1568 | /* Match against the parsed flags. */ |
| 1569 | if (!strcmp (flg_operand->name, pflag->name)) |
| 1570 | { |
| 1571 | /*TODO: Check if it is duplicated. */ |
| 1572 | pflag->code = *flgopridx; |
| 1573 | lnflg--; |
| 1574 | break; /* goto next flag class and parsed flag. */ |
| 1575 | } |
| 1576 | } |
| 1577 | } |
| 1578 | } |
| 1579 | /* Did I check all the parsed flags? */ |
| 1580 | if (lnflg) |
| 1581 | goto match_failed; |
| 1582 | |
| 1583 | pr_debug ("flg"); |
| 1584 | /* Possible match -- did we use all of our input? */ |
| 1585 | if (tokidx == ntok) |
| 1586 | { |
| 1587 | *pntok = ntok; |
| 1588 | pr_debug ("\n"); |
| 1589 | return opcode; |
| 1590 | } |
| 1591 | |
| 1592 | match_failed:; |
| 1593 | pr_debug ("\n"); |
| 1594 | /* Restore the original parameters. */ |
| 1595 | memcpy (tok, bktok, MAX_INSN_ARGS * sizeof (*tok)); |
| 1596 | ntok = bkntok; |
| 1597 | } |
| 1598 | while (++opcode - arc_opcodes < (int) arc_num_opcodes |
| 1599 | && !strcmp (opcode->name, first_opcode->name)); |
| 1600 | |
| 1601 | if (*pcpumatch) |
| 1602 | *pcpumatch = got_cpu_match; |
| 1603 | |
| 1604 | return NULL; |
| 1605 | } |
| 1606 | |
| 1607 | /* Swap operand tokens. */ |
| 1608 | |
| 1609 | static void |
| 1610 | swap_operand (expressionS *operand_array, |
| 1611 | unsigned source, |
| 1612 | unsigned destination) |
| 1613 | { |
| 1614 | expressionS cpy_operand; |
| 1615 | expressionS *src_operand; |
| 1616 | expressionS *dst_operand; |
| 1617 | size_t size; |
| 1618 | |
| 1619 | if (source == destination) |
| 1620 | return; |
| 1621 | |
| 1622 | src_operand = &operand_array[source]; |
| 1623 | dst_operand = &operand_array[destination]; |
| 1624 | size = sizeof (expressionS); |
| 1625 | |
| 1626 | /* Make copy of operand to swap with and swap. */ |
| 1627 | memcpy (&cpy_operand, dst_operand, size); |
| 1628 | memcpy (dst_operand, src_operand, size); |
| 1629 | memcpy (src_operand, &cpy_operand, size); |
| 1630 | } |
| 1631 | |
| 1632 | /* Check if *op matches *tok type. |
| 1633 | Returns FALSE if they don't match, TRUE if they match. */ |
| 1634 | |
| 1635 | static bfd_boolean |
| 1636 | pseudo_operand_match (const expressionS *tok, |
| 1637 | const struct arc_operand_operation *op) |
| 1638 | { |
| 1639 | offsetT min, max, val; |
| 1640 | bfd_boolean ret; |
| 1641 | const struct arc_operand *operand_real = &arc_operands[op->operand_idx]; |
| 1642 | |
| 1643 | ret = FALSE; |
| 1644 | switch (tok->X_op) |
| 1645 | { |
| 1646 | case O_constant: |
| 1647 | if (operand_real->bits == 32 && (operand_real->flags & ARC_OPERAND_LIMM)) |
| 1648 | ret = 1; |
| 1649 | else if (!(operand_real->flags & ARC_OPERAND_IR)) |
| 1650 | { |
| 1651 | val = tok->X_add_number + op->count; |
| 1652 | if (operand_real->flags & ARC_OPERAND_SIGNED) |
| 1653 | { |
| 1654 | max = (1 << (operand_real->bits - 1)) - 1; |
| 1655 | min = -(1 << (operand_real->bits - 1)); |
| 1656 | } |
| 1657 | else |
| 1658 | { |
| 1659 | max = (1 << operand_real->bits) - 1; |
| 1660 | min = 0; |
| 1661 | } |
| 1662 | if (min <= val && val <= max) |
| 1663 | ret = TRUE; |
| 1664 | } |
| 1665 | break; |
| 1666 | |
| 1667 | case O_symbol: |
| 1668 | /* Handle all symbols as long immediates or signed 9. */ |
| 1669 | if (operand_real->flags & ARC_OPERAND_LIMM || |
| 1670 | ((operand_real->flags & ARC_OPERAND_SIGNED) && operand_real->bits == 9)) |
| 1671 | ret = TRUE; |
| 1672 | break; |
| 1673 | |
| 1674 | case O_register: |
| 1675 | if (operand_real->flags & ARC_OPERAND_IR) |
| 1676 | ret = TRUE; |
| 1677 | break; |
| 1678 | |
| 1679 | case O_bracket: |
| 1680 | if (operand_real->flags & ARC_OPERAND_BRAKET) |
| 1681 | ret = TRUE; |
| 1682 | break; |
| 1683 | |
| 1684 | default: |
| 1685 | /* Unknown. */ |
| 1686 | break; |
| 1687 | } |
| 1688 | return ret; |
| 1689 | } |
| 1690 | |
| 1691 | /* Find pseudo instruction in array. */ |
| 1692 | |
| 1693 | static const struct arc_pseudo_insn * |
| 1694 | find_pseudo_insn (const char *opname, |
| 1695 | int ntok, |
| 1696 | const expressionS *tok) |
| 1697 | { |
| 1698 | const struct arc_pseudo_insn *pseudo_insn = NULL; |
| 1699 | const struct arc_operand_operation *op; |
| 1700 | unsigned int i; |
| 1701 | int j; |
| 1702 | |
| 1703 | for (i = 0; i < arc_num_pseudo_insn; ++i) |
| 1704 | { |
| 1705 | pseudo_insn = &arc_pseudo_insns[i]; |
| 1706 | if (strcmp (pseudo_insn->mnemonic_p, opname) == 0) |
| 1707 | { |
| 1708 | op = pseudo_insn->operand; |
| 1709 | for (j = 0; j < ntok; ++j) |
| 1710 | if (!pseudo_operand_match (&tok[j], &op[j])) |
| 1711 | break; |
| 1712 | |
| 1713 | /* Found the right instruction. */ |
| 1714 | if (j == ntok) |
| 1715 | return pseudo_insn; |
| 1716 | } |
| 1717 | } |
| 1718 | return NULL; |
| 1719 | } |
| 1720 | |
| 1721 | /* Assumes the expressionS *tok is of sufficient size. */ |
| 1722 | |
| 1723 | static const struct arc_opcode * |
| 1724 | find_special_case_pseudo (const char *opname, |
| 1725 | int *ntok, |
| 1726 | expressionS *tok, |
| 1727 | int *nflgs, |
| 1728 | struct arc_flags *pflags) |
| 1729 | { |
| 1730 | const struct arc_pseudo_insn *pseudo_insn = NULL; |
| 1731 | const struct arc_operand_operation *operand_pseudo; |
| 1732 | const struct arc_operand *operand_real; |
| 1733 | unsigned i; |
| 1734 | char construct_operand[MAX_CONSTR_STR]; |
| 1735 | |
| 1736 | /* Find whether opname is in pseudo instruction array. */ |
| 1737 | pseudo_insn = find_pseudo_insn (opname, *ntok, tok); |
| 1738 | |
| 1739 | if (pseudo_insn == NULL) |
| 1740 | return NULL; |
| 1741 | |
| 1742 | /* Handle flag, Limited to one flag at the moment. */ |
| 1743 | if (pseudo_insn->flag_r != NULL) |
| 1744 | *nflgs += tokenize_flags (pseudo_insn->flag_r, &pflags[*nflgs], |
| 1745 | MAX_INSN_FLGS - *nflgs); |
| 1746 | |
| 1747 | /* Handle operand operations. */ |
| 1748 | for (i = 0; i < pseudo_insn->operand_cnt; ++i) |
| 1749 | { |
| 1750 | operand_pseudo = &pseudo_insn->operand[i]; |
| 1751 | operand_real = &arc_operands[operand_pseudo->operand_idx]; |
| 1752 | |
| 1753 | if (operand_real->flags & ARC_OPERAND_BRAKET && |
| 1754 | !operand_pseudo->needs_insert) |
| 1755 | continue; |
| 1756 | |
| 1757 | /* Has to be inserted (i.e. this token does not exist yet). */ |
| 1758 | if (operand_pseudo->needs_insert) |
| 1759 | { |
| 1760 | if (operand_real->flags & ARC_OPERAND_BRAKET) |
| 1761 | { |
| 1762 | tok[i].X_op = O_bracket; |
| 1763 | ++(*ntok); |
| 1764 | continue; |
| 1765 | } |
| 1766 | |
| 1767 | /* Check if operand is a register or constant and handle it |
| 1768 | by type. */ |
| 1769 | if (operand_real->flags & ARC_OPERAND_IR) |
| 1770 | snprintf (construct_operand, MAX_CONSTR_STR, "r%d", |
| 1771 | operand_pseudo->count); |
| 1772 | else |
| 1773 | snprintf (construct_operand, MAX_CONSTR_STR, "%d", |
| 1774 | operand_pseudo->count); |
| 1775 | |
| 1776 | tokenize_arguments (construct_operand, &tok[i], 1); |
| 1777 | ++(*ntok); |
| 1778 | } |
| 1779 | |
| 1780 | else if (operand_pseudo->count) |
| 1781 | { |
| 1782 | /* Operand number has to be adjusted accordingly (by operand |
| 1783 | type). */ |
| 1784 | switch (tok[i].X_op) |
| 1785 | { |
| 1786 | case O_constant: |
| 1787 | tok[i].X_add_number += operand_pseudo->count; |
| 1788 | break; |
| 1789 | |
| 1790 | case O_symbol: |
| 1791 | break; |
| 1792 | |
| 1793 | default: |
| 1794 | /* Ignored. */ |
| 1795 | break; |
| 1796 | } |
| 1797 | } |
| 1798 | } |
| 1799 | |
| 1800 | /* Swap operands if necessary. Only supports one swap at the |
| 1801 | moment. */ |
| 1802 | for (i = 0; i < pseudo_insn->operand_cnt; ++i) |
| 1803 | { |
| 1804 | operand_pseudo = &pseudo_insn->operand[i]; |
| 1805 | |
| 1806 | if (operand_pseudo->swap_operand_idx == i) |
| 1807 | continue; |
| 1808 | |
| 1809 | swap_operand (tok, i, operand_pseudo->swap_operand_idx); |
| 1810 | |
| 1811 | /* Prevent a swap back later by breaking out. */ |
| 1812 | break; |
| 1813 | } |
| 1814 | |
| 1815 | return (const struct arc_opcode *) |
| 1816 | hash_find (arc_opcode_hash, pseudo_insn->mnemonic_r); |
| 1817 | } |
| 1818 | |
| 1819 | static const struct arc_opcode * |
| 1820 | find_special_case_flag (const char *opname, |
| 1821 | int *nflgs, |
| 1822 | struct arc_flags *pflags) |
| 1823 | { |
| 1824 | unsigned int i; |
| 1825 | const char *flagnm; |
| 1826 | unsigned flag_idx, flag_arr_idx; |
| 1827 | size_t flaglen, oplen; |
| 1828 | const struct arc_flag_special *arc_flag_special_opcode; |
| 1829 | const struct arc_opcode *opcode; |
| 1830 | |
| 1831 | /* Search for special case instruction. */ |
| 1832 | for (i = 0; i < arc_num_flag_special; i++) |
| 1833 | { |
| 1834 | arc_flag_special_opcode = &arc_flag_special_cases[i]; |
| 1835 | oplen = strlen (arc_flag_special_opcode->name); |
| 1836 | |
| 1837 | if (strncmp (opname, arc_flag_special_opcode->name, oplen) != 0) |
| 1838 | continue; |
| 1839 | |
| 1840 | /* Found a potential special case instruction, now test for |
| 1841 | flags. */ |
| 1842 | for (flag_arr_idx = 0;; ++flag_arr_idx) |
| 1843 | { |
| 1844 | flag_idx = arc_flag_special_opcode->flags[flag_arr_idx]; |
| 1845 | if (flag_idx == 0) |
| 1846 | break; /* End of array, nothing found. */ |
| 1847 | |
| 1848 | flagnm = arc_flag_operands[flag_idx].name; |
| 1849 | flaglen = strlen (flagnm); |
| 1850 | if (strcmp (opname + oplen, flagnm) == 0) |
| 1851 | { |
| 1852 | opcode = (const struct arc_opcode *) |
| 1853 | hash_find (arc_opcode_hash, |
| 1854 | arc_flag_special_opcode->name); |
| 1855 | |
| 1856 | if (*nflgs + 1 > MAX_INSN_FLGS) |
| 1857 | break; |
| 1858 | memcpy (pflags[*nflgs].name, flagnm, flaglen); |
| 1859 | pflags[*nflgs].name[flaglen] = '\0'; |
| 1860 | (*nflgs)++; |
| 1861 | return opcode; |
| 1862 | } |
| 1863 | } |
| 1864 | } |
| 1865 | return NULL; |
| 1866 | } |
| 1867 | |
| 1868 | /* Used to find special case opcode. */ |
| 1869 | |
| 1870 | static const struct arc_opcode * |
| 1871 | find_special_case (const char *opname, |
| 1872 | int *nflgs, |
| 1873 | struct arc_flags *pflags, |
| 1874 | expressionS *tok, |
| 1875 | int *ntok) |
| 1876 | { |
| 1877 | const struct arc_opcode *opcode; |
| 1878 | |
| 1879 | opcode = find_special_case_pseudo (opname, ntok, tok, nflgs, pflags); |
| 1880 | |
| 1881 | if (opcode == NULL) |
| 1882 | opcode = find_special_case_flag (opname, nflgs, pflags); |
| 1883 | |
| 1884 | return opcode; |
| 1885 | } |
| 1886 | |
| 1887 | static void |
| 1888 | preprocess_operands (const struct arc_opcode *opcode, |
| 1889 | expressionS *tok, |
| 1890 | int ntok) |
| 1891 | { |
| 1892 | int i; |
| 1893 | size_t len; |
| 1894 | const char *p; |
| 1895 | unsigned j; |
| 1896 | const struct arc_aux_reg *auxr; |
| 1897 | |
| 1898 | for (i = 0; i < ntok; i++) |
| 1899 | { |
| 1900 | switch (tok[i].X_op) |
| 1901 | { |
| 1902 | case O_illegal: |
| 1903 | case O_absent: |
| 1904 | break; /* Throw and error. */ |
| 1905 | |
| 1906 | case O_symbol: |
| 1907 | if (opcode->class != AUXREG) |
| 1908 | break; |
| 1909 | /* Convert the symbol to a constant if possible. */ |
| 1910 | p = S_GET_NAME (tok[i].X_add_symbol); |
| 1911 | len = strlen (p); |
| 1912 | |
| 1913 | auxr = &arc_aux_regs[0]; |
| 1914 | for (j = 0; j < arc_num_aux_regs; j++, auxr++) |
| 1915 | if (len == auxr->length |
| 1916 | && strcasecmp (auxr->name, p) == 0) |
| 1917 | { |
| 1918 | tok[i].X_op = O_constant; |
| 1919 | tok[i].X_add_number = auxr->address; |
| 1920 | break; |
| 1921 | } |
| 1922 | break; |
| 1923 | default: |
| 1924 | break; |
| 1925 | } |
| 1926 | } |
| 1927 | } |
| 1928 | |
| 1929 | /* Given an opcode name, pre-tockenized set of argumenst and the |
| 1930 | opcode flags, take it all the way through emission. */ |
| 1931 | |
| 1932 | static void |
| 1933 | assemble_tokens (const char *opname, |
| 1934 | expressionS *tok, |
| 1935 | int ntok, |
| 1936 | struct arc_flags *pflags, |
| 1937 | int nflgs) |
| 1938 | { |
| 1939 | bfd_boolean found_something = FALSE; |
| 1940 | const struct arc_opcode *opcode; |
| 1941 | int cpumatch = 1; |
| 1942 | |
| 1943 | /* Search opcodes. */ |
| 1944 | opcode = (const struct arc_opcode *) hash_find (arc_opcode_hash, opname); |
| 1945 | |
| 1946 | /* Couldn't find opcode conventional way, try special cases. */ |
| 1947 | if (!opcode) |
| 1948 | opcode = find_special_case (opname, &nflgs, pflags, tok, &ntok); |
| 1949 | |
| 1950 | if (opcode) |
| 1951 | { |
| 1952 | pr_debug ("%s:%d: assemble_tokens: %s trying opcode 0x%08X\n", |
| 1953 | frag_now->fr_file, frag_now->fr_line, opcode->name, |
| 1954 | opcode->opcode); |
| 1955 | |
| 1956 | preprocess_operands (opcode, tok, ntok); |
| 1957 | |
| 1958 | found_something = TRUE; |
| 1959 | opcode = find_opcode_match (opcode, tok, &ntok, pflags, nflgs, &cpumatch); |
| 1960 | if (opcode) |
| 1961 | { |
| 1962 | struct arc_insn insn; |
| 1963 | assemble_insn (opcode, tok, ntok, pflags, nflgs, &insn); |
| 1964 | emit_insn (&insn); |
| 1965 | return; |
| 1966 | } |
| 1967 | } |
| 1968 | |
| 1969 | if (found_something) |
| 1970 | { |
| 1971 | if (cpumatch) |
| 1972 | as_bad (_("inappropriate arguments for opcode '%s'"), opname); |
| 1973 | else |
| 1974 | as_bad (_("opcode '%s' not supported for target %s"), opname, |
| 1975 | arc_target_name); |
| 1976 | } |
| 1977 | else |
| 1978 | as_bad (_("unknown opcode '%s'"), opname); |
| 1979 | } |
| 1980 | |
| 1981 | /* The public interface to the instruction assembler. */ |
| 1982 | |
| 1983 | void |
| 1984 | md_assemble (char *str) |
| 1985 | { |
| 1986 | char *opname; |
| 1987 | expressionS tok[MAX_INSN_ARGS]; |
| 1988 | int ntok, nflg; |
| 1989 | size_t opnamelen; |
| 1990 | struct arc_flags flags[MAX_INSN_FLGS]; |
| 1991 | |
| 1992 | /* Split off the opcode. */ |
| 1993 | opnamelen = strspn (str, "abcdefghijklmnopqrstuvwxyz_0123468"); |
| 1994 | opname = xmalloc (opnamelen + 1); |
| 1995 | memcpy (opname, str, opnamelen); |
| 1996 | opname[opnamelen] = '\0'; |
| 1997 | |
| 1998 | /* Signalize we are assmbling the instructions. */ |
| 1999 | assembling_insn = TRUE; |
| 2000 | |
| 2001 | /* Tokenize the flags. */ |
| 2002 | if ((nflg = tokenize_flags (str + opnamelen, flags, MAX_INSN_FLGS)) == -1) |
| 2003 | { |
| 2004 | as_bad (_("syntax error")); |
| 2005 | return; |
| 2006 | } |
| 2007 | |
| 2008 | /* Scan up to the end of the mnemonic which must end in space or end |
| 2009 | of string. */ |
| 2010 | str += opnamelen; |
| 2011 | for (; *str != '\0'; str++) |
| 2012 | if (*str == ' ') |
| 2013 | break; |
| 2014 | |
| 2015 | /* Tokenize the rest of the line. */ |
| 2016 | if ((ntok = tokenize_arguments (str, tok, MAX_INSN_ARGS)) < 0) |
| 2017 | { |
| 2018 | as_bad (_("syntax error")); |
| 2019 | return; |
| 2020 | } |
| 2021 | |
| 2022 | /* Finish it off. */ |
| 2023 | assemble_tokens (opname, tok, ntok, flags, nflg); |
| 2024 | assembling_insn = FALSE; |
| 2025 | } |
| 2026 | |
| 2027 | /* Callback to insert a register into the hash table. */ |
| 2028 | |
| 2029 | static void |
| 2030 | declare_register (char *name, int number) |
| 2031 | { |
| 2032 | const char *err; |
| 2033 | symbolS *regS = symbol_create (name, reg_section, |
| 2034 | number, &zero_address_frag); |
| 2035 | |
| 2036 | err = hash_insert (arc_reg_hash, S_GET_NAME (regS), (void *) regS); |
| 2037 | if (err) |
| 2038 | as_fatal ("Inserting \"%s\" into register table failed: %s", |
| 2039 | name, err); |
| 2040 | } |
| 2041 | |
| 2042 | /* Construct symbols for each of the general registers. */ |
| 2043 | |
| 2044 | static void |
| 2045 | declare_register_set (void) |
| 2046 | { |
| 2047 | int i; |
| 2048 | for (i = 0; i < 64; ++i) |
| 2049 | { |
| 2050 | char name[7]; |
| 2051 | |
| 2052 | sprintf (name, "r%d", i); |
| 2053 | declare_register (name, i); |
| 2054 | if ((i & 0x01) == 0) |
| 2055 | { |
| 2056 | sprintf (name, "r%dr%d", i, i+1); |
| 2057 | declare_register (name, i); |
| 2058 | } |
| 2059 | } |
| 2060 | } |
| 2061 | |
| 2062 | /* Port-specific assembler initialization. This function is called |
| 2063 | once, at assembler startup time. */ |
| 2064 | |
| 2065 | void |
| 2066 | md_begin (void) |
| 2067 | { |
| 2068 | unsigned int i; |
| 2069 | |
| 2070 | /* The endianness can be chosen "at the factory". */ |
| 2071 | target_big_endian = byte_order == BIG_ENDIAN; |
| 2072 | |
| 2073 | if (!bfd_set_arch_mach (stdoutput, bfd_arch_arc, arc_mach_type)) |
| 2074 | as_warn (_("could not set architecture and machine")); |
| 2075 | |
| 2076 | /* Set elf header flags. */ |
| 2077 | bfd_set_private_flags (stdoutput, arc_eflag); |
| 2078 | |
| 2079 | /* Set up a hash table for the instructions. */ |
| 2080 | arc_opcode_hash = hash_new (); |
| 2081 | if (arc_opcode_hash == NULL) |
| 2082 | as_fatal (_("Virtual memory exhausted")); |
| 2083 | |
| 2084 | /* Initialize the hash table with the insns. */ |
| 2085 | for (i = 0; i < arc_num_opcodes;) |
| 2086 | { |
| 2087 | const char *name, *retval; |
| 2088 | |
| 2089 | name = arc_opcodes[i].name; |
| 2090 | retval = hash_insert (arc_opcode_hash, name, (void *) &arc_opcodes[i]); |
| 2091 | if (retval) |
| 2092 | as_fatal (_("internal error: can't hash opcode '%s': %s"), |
| 2093 | name, retval); |
| 2094 | |
| 2095 | while (++i < arc_num_opcodes |
| 2096 | && (arc_opcodes[i].name == name |
| 2097 | || !strcmp (arc_opcodes[i].name, name))) |
| 2098 | continue; |
| 2099 | } |
| 2100 | |
| 2101 | /* Register declaration. */ |
| 2102 | arc_reg_hash = hash_new (); |
| 2103 | if (arc_reg_hash == NULL) |
| 2104 | as_fatal (_("Virtual memory exhausted")); |
| 2105 | |
| 2106 | declare_register_set (); |
| 2107 | declare_register ("gp", 26); |
| 2108 | declare_register ("fp", 27); |
| 2109 | declare_register ("sp", 28); |
| 2110 | declare_register ("ilink", 29); |
| 2111 | declare_register ("ilink1", 29); |
| 2112 | declare_register ("ilink2", 30); |
| 2113 | declare_register ("blink", 31); |
| 2114 | |
| 2115 | declare_register ("mlo", 57); |
| 2116 | declare_register ("mmid", 58); |
| 2117 | declare_register ("mhi", 59); |
| 2118 | |
| 2119 | declare_register ("acc1", 56); |
| 2120 | declare_register ("acc2", 57); |
| 2121 | |
| 2122 | declare_register ("lp_count", 60); |
| 2123 | declare_register ("pcl", 63); |
| 2124 | |
| 2125 | /* Initialize the last instructions. */ |
| 2126 | memset (&arc_last_insns[0], 0, sizeof (arc_last_insns)); |
| 2127 | } |
| 2128 | |
| 2129 | /* Write a value out to the object file, using the appropriate |
| 2130 | endianness. */ |
| 2131 | |
| 2132 | void |
| 2133 | md_number_to_chars (char *buf, |
| 2134 | valueT val, |
| 2135 | int n) |
| 2136 | { |
| 2137 | if (target_big_endian) |
| 2138 | number_to_chars_bigendian (buf, val, n); |
| 2139 | else |
| 2140 | number_to_chars_littleendian (buf, val, n); |
| 2141 | } |
| 2142 | |
| 2143 | /* Round up a section size to the appropriate boundary. */ |
| 2144 | |
| 2145 | valueT |
| 2146 | md_section_align (segT segment, |
| 2147 | valueT size) |
| 2148 | { |
| 2149 | int align = bfd_get_section_alignment (stdoutput, segment); |
| 2150 | |
| 2151 | return ((size + (1 << align) - 1) & (-((valueT) 1 << align))); |
| 2152 | } |
| 2153 | |
| 2154 | /* The location from which a PC relative jump should be calculated, |
| 2155 | given a PC relative reloc. */ |
| 2156 | |
| 2157 | long |
| 2158 | md_pcrel_from_section (fixS *fixP, |
| 2159 | segT sec) |
| 2160 | { |
| 2161 | offsetT base = fixP->fx_where + fixP->fx_frag->fr_address; |
| 2162 | |
| 2163 | pr_debug ("pcrel_from_section, fx_offset = %d\n", (int) fixP->fx_offset); |
| 2164 | |
| 2165 | if (fixP->fx_addsy != (symbolS *) NULL |
| 2166 | && (!S_IS_DEFINED (fixP->fx_addsy) |
| 2167 | || S_GET_SEGMENT (fixP->fx_addsy) != sec)) |
| 2168 | { |
| 2169 | pr_debug ("Unknown pcrel symbol: %s\n", S_GET_NAME (fixP->fx_addsy)); |
| 2170 | |
| 2171 | /* The symbol is undefined (or is defined but not in this section). |
| 2172 | Let the linker figure it out. */ |
| 2173 | return 0; |
| 2174 | } |
| 2175 | |
| 2176 | if ((int) fixP->fx_r_type < 0) |
| 2177 | { |
| 2178 | /* These are the "internal" relocations. Align them to |
| 2179 | 32 bit boundary (PCL), for the moment. */ |
| 2180 | base &= ~3; |
| 2181 | } |
| 2182 | else |
| 2183 | { |
| 2184 | switch (fixP->fx_r_type) |
| 2185 | { |
| 2186 | case BFD_RELOC_ARC_PC32: |
| 2187 | /* The hardware calculates relative to the start of the |
| 2188 | insn, but this relocation is relative to location of the |
| 2189 | LIMM, compensate. The base always needs to be |
| 2190 | substracted by 4 as we do not support this type of PCrel |
| 2191 | relocation for short instructions. */ |
| 2192 | base -= 4; |
| 2193 | /* Fall through. */ |
| 2194 | case BFD_RELOC_ARC_PLT32: |
| 2195 | case BFD_RELOC_ARC_S25H_PCREL_PLT: |
| 2196 | case BFD_RELOC_ARC_S21H_PCREL_PLT: |
| 2197 | case BFD_RELOC_ARC_S25W_PCREL_PLT: |
| 2198 | case BFD_RELOC_ARC_S21W_PCREL_PLT: |
| 2199 | |
| 2200 | case BFD_RELOC_ARC_S21H_PCREL: |
| 2201 | case BFD_RELOC_ARC_S25H_PCREL: |
| 2202 | case BFD_RELOC_ARC_S13_PCREL: |
| 2203 | case BFD_RELOC_ARC_S21W_PCREL: |
| 2204 | case BFD_RELOC_ARC_S25W_PCREL: |
| 2205 | base &= ~3; |
| 2206 | break; |
| 2207 | default: |
| 2208 | as_bad_where (fixP->fx_file, fixP->fx_line, |
| 2209 | _("unhandled reloc %s in md_pcrel_from_section"), |
| 2210 | bfd_get_reloc_code_name (fixP->fx_r_type)); |
| 2211 | break; |
| 2212 | } |
| 2213 | } |
| 2214 | |
| 2215 | pr_debug ("pcrel from %x + %lx = %x, symbol: %s (%x)\n", |
| 2216 | fixP->fx_frag->fr_address, fixP->fx_where, base, |
| 2217 | fixP->fx_addsy ? S_GET_NAME (fixP->fx_addsy) : "(null)", |
| 2218 | fixP->fx_addsy ? S_GET_VALUE (fixP->fx_addsy) : 0); |
| 2219 | |
| 2220 | return base; |
| 2221 | } |
| 2222 | |
| 2223 | /* Given a BFD relocation find the coresponding operand. */ |
| 2224 | |
| 2225 | static const struct arc_operand * |
| 2226 | find_operand_for_reloc (extended_bfd_reloc_code_real_type reloc) |
| 2227 | { |
| 2228 | unsigned i; |
| 2229 | |
| 2230 | for (i = 0; i < arc_num_operands; i++) |
| 2231 | if (arc_operands[i].default_reloc == reloc) |
| 2232 | return &arc_operands[i]; |
| 2233 | return NULL; |
| 2234 | } |
| 2235 | |
| 2236 | /* Insert an operand value into an instruction. */ |
| 2237 | |
| 2238 | static unsigned |
| 2239 | insert_operand (unsigned insn, |
| 2240 | const struct arc_operand *operand, |
| 2241 | offsetT val, |
| 2242 | char *file, |
| 2243 | unsigned line) |
| 2244 | { |
| 2245 | offsetT min = 0, max = 0; |
| 2246 | |
| 2247 | if (operand->bits != 32 |
| 2248 | && !(operand->flags & ARC_OPERAND_NCHK) |
| 2249 | && !(operand->flags & ARC_OPERAND_FAKE)) |
| 2250 | { |
| 2251 | if (operand->flags & ARC_OPERAND_SIGNED) |
| 2252 | { |
| 2253 | max = (1 << (operand->bits - 1)) - 1; |
| 2254 | min = -(1 << (operand->bits - 1)); |
| 2255 | } |
| 2256 | else |
| 2257 | { |
| 2258 | max = (1 << operand->bits) - 1; |
| 2259 | min = 0; |
| 2260 | } |
| 2261 | |
| 2262 | if (val < min || val > max) |
| 2263 | as_bad_value_out_of_range (_("operand"), |
| 2264 | val, min, max, file, line); |
| 2265 | } |
| 2266 | |
| 2267 | pr_debug ("insert field: %ld <= %ld <= %ld in 0x%08x\n", |
| 2268 | min, val, max, insn); |
| 2269 | |
| 2270 | if ((operand->flags & ARC_OPERAND_ALIGNED32) |
| 2271 | && (val & 0x03)) |
| 2272 | as_bad_where (file, line, |
| 2273 | _("Unaligned operand. Needs to be 32bit aligned")); |
| 2274 | |
| 2275 | if ((operand->flags & ARC_OPERAND_ALIGNED16) |
| 2276 | && (val & 0x01)) |
| 2277 | as_bad_where (file, line, |
| 2278 | _("Unaligned operand. Needs to be 16bit aligned")); |
| 2279 | |
| 2280 | if (operand->insert) |
| 2281 | { |
| 2282 | const char *errmsg = NULL; |
| 2283 | |
| 2284 | insn = (*operand->insert) (insn, val, &errmsg); |
| 2285 | if (errmsg) |
| 2286 | as_warn_where (file, line, "%s", errmsg); |
| 2287 | } |
| 2288 | else |
| 2289 | { |
| 2290 | if (operand->flags & ARC_OPERAND_TRUNCATE) |
| 2291 | { |
| 2292 | if (operand->flags & ARC_OPERAND_ALIGNED32) |
| 2293 | val >>= 2; |
| 2294 | if (operand->flags & ARC_OPERAND_ALIGNED16) |
| 2295 | val >>= 1; |
| 2296 | } |
| 2297 | insn |= ((val & ((1 << operand->bits) - 1)) << operand->shift); |
| 2298 | } |
| 2299 | return insn; |
| 2300 | } |
| 2301 | |
| 2302 | /* Apply a fixup to the object code. At this point all symbol values |
| 2303 | should be fully resolved, and we attempt to completely resolve the |
| 2304 | reloc. If we can not do that, we determine the correct reloc code |
| 2305 | and put it back in the fixup. To indicate that a fixup has been |
| 2306 | eliminated, set fixP->fx_done. */ |
| 2307 | |
| 2308 | void |
| 2309 | md_apply_fix (fixS *fixP, |
| 2310 | valueT *valP, |
| 2311 | segT seg) |
| 2312 | { |
| 2313 | char * const fixpos = fixP->fx_frag->fr_literal + fixP->fx_where; |
| 2314 | valueT value = *valP; |
| 2315 | unsigned insn = 0; |
| 2316 | symbolS *fx_addsy, *fx_subsy; |
| 2317 | offsetT fx_offset; |
| 2318 | segT add_symbol_segment = absolute_section; |
| 2319 | segT sub_symbol_segment = absolute_section; |
| 2320 | const struct arc_operand *operand = NULL; |
| 2321 | extended_bfd_reloc_code_real_type reloc; |
| 2322 | |
| 2323 | pr_debug ("%s:%u: apply_fix: r_type=%d (%s) value=0x%lX offset=0x%lX\n", |
| 2324 | fixP->fx_file, fixP->fx_line, fixP->fx_r_type, |
| 2325 | ((int) fixP->fx_r_type < 0) ? "Internal": |
| 2326 | bfd_get_reloc_code_name (fixP->fx_r_type), value, |
| 2327 | fixP->fx_offset); |
| 2328 | |
| 2329 | fx_addsy = fixP->fx_addsy; |
| 2330 | fx_subsy = fixP->fx_subsy; |
| 2331 | fx_offset = 0; |
| 2332 | |
| 2333 | if (fx_addsy) |
| 2334 | { |
| 2335 | add_symbol_segment = S_GET_SEGMENT (fx_addsy); |
| 2336 | } |
| 2337 | |
| 2338 | if (fx_subsy |
| 2339 | && fixP->fx_r_type != BFD_RELOC_ARC_TLS_DTPOFF |
| 2340 | && fixP->fx_r_type != BFD_RELOC_ARC_TLS_DTPOFF_S9 |
| 2341 | && fixP->fx_r_type != BFD_RELOC_ARC_TLS_GD_LD) |
| 2342 | { |
| 2343 | resolve_symbol_value (fx_subsy); |
| 2344 | sub_symbol_segment = S_GET_SEGMENT (fx_subsy); |
| 2345 | |
| 2346 | if (sub_symbol_segment == absolute_section) |
| 2347 | { |
| 2348 | /* The symbol is really a constant. */ |
| 2349 | fx_offset -= S_GET_VALUE (fx_subsy); |
| 2350 | fx_subsy = NULL; |
| 2351 | } |
| 2352 | else |
| 2353 | { |
| 2354 | as_bad_where (fixP->fx_file, fixP->fx_line, |
| 2355 | _("can't resolve `%s' {%s section} - `%s' {%s section}"), |
| 2356 | fx_addsy ? S_GET_NAME (fx_addsy) : "0", |
| 2357 | segment_name (add_symbol_segment), |
| 2358 | S_GET_NAME (fx_subsy), |
| 2359 | segment_name (sub_symbol_segment)); |
| 2360 | return; |
| 2361 | } |
| 2362 | } |
| 2363 | |
| 2364 | if (fx_addsy |
| 2365 | && !S_IS_WEAK (fx_addsy)) |
| 2366 | { |
| 2367 | if (add_symbol_segment == seg |
| 2368 | && fixP->fx_pcrel) |
| 2369 | { |
| 2370 | value += S_GET_VALUE (fx_addsy); |
| 2371 | value -= md_pcrel_from_section (fixP, seg); |
| 2372 | fx_addsy = NULL; |
| 2373 | fixP->fx_pcrel = FALSE; |
| 2374 | } |
| 2375 | else if (add_symbol_segment == absolute_section) |
| 2376 | { |
| 2377 | value = fixP->fx_offset; |
| 2378 | fx_offset += S_GET_VALUE (fixP->fx_addsy); |
| 2379 | fx_addsy = NULL; |
| 2380 | fixP->fx_pcrel = FALSE; |
| 2381 | } |
| 2382 | } |
| 2383 | |
| 2384 | if (!fx_addsy) |
| 2385 | fixP->fx_done = TRUE; |
| 2386 | |
| 2387 | if (fixP->fx_pcrel) |
| 2388 | { |
| 2389 | if (fx_addsy |
| 2390 | && ((S_IS_DEFINED (fx_addsy) |
| 2391 | && S_GET_SEGMENT (fx_addsy) != seg) |
| 2392 | || S_IS_WEAK (fx_addsy))) |
| 2393 | value += md_pcrel_from_section (fixP, seg); |
| 2394 | |
| 2395 | switch (fixP->fx_r_type) |
| 2396 | { |
| 2397 | case BFD_RELOC_ARC_32_ME: |
| 2398 | /* This is a pc-relative value in a LIMM. Adjust it to the |
| 2399 | address of the instruction not to the address of the |
| 2400 | LIMM. Note: it is not anylonger valid this afirmation as |
| 2401 | the linker consider ARC_PC32 a fixup to entire 64 bit |
| 2402 | insn. */ |
| 2403 | fixP->fx_offset += fixP->fx_frag->fr_address; |
| 2404 | /* Fall through. */ |
| 2405 | case BFD_RELOC_32: |
| 2406 | fixP->fx_r_type = BFD_RELOC_ARC_PC32; |
| 2407 | /* Fall through. */ |
| 2408 | case BFD_RELOC_ARC_PC32: |
| 2409 | /* fixP->fx_offset += fixP->fx_where - fixP->fx_dot_value; */ |
| 2410 | break; |
| 2411 | default: |
| 2412 | if ((int) fixP->fx_r_type < 0) |
| 2413 | as_fatal (_("PC relative relocation not allowed for (internal) type %d"), |
| 2414 | fixP->fx_r_type); |
| 2415 | break; |
| 2416 | } |
| 2417 | } |
| 2418 | |
| 2419 | pr_debug ("%s:%u: apply_fix: r_type=%d (%s) value=0x%lX offset=0x%lX\n", |
| 2420 | fixP->fx_file, fixP->fx_line, fixP->fx_r_type, |
| 2421 | ((int) fixP->fx_r_type < 0) ? "Internal": |
| 2422 | bfd_get_reloc_code_name (fixP->fx_r_type), value, |
| 2423 | fixP->fx_offset); |
| 2424 | |
| 2425 | |
| 2426 | /* Now check for TLS relocations. */ |
| 2427 | reloc = fixP->fx_r_type; |
| 2428 | switch (reloc) |
| 2429 | { |
| 2430 | case BFD_RELOC_ARC_TLS_DTPOFF: |
| 2431 | case BFD_RELOC_ARC_TLS_LE_32: |
| 2432 | if (fixP->fx_done) |
| 2433 | break; |
| 2434 | /* Fall through. */ |
| 2435 | case BFD_RELOC_ARC_TLS_GD_GOT: |
| 2436 | case BFD_RELOC_ARC_TLS_IE_GOT: |
| 2437 | S_SET_THREAD_LOCAL (fixP->fx_addsy); |
| 2438 | break; |
| 2439 | |
| 2440 | case BFD_RELOC_ARC_TLS_GD_LD: |
| 2441 | gas_assert (!fixP->fx_offset); |
| 2442 | if (fixP->fx_subsy) |
| 2443 | fixP->fx_offset |
| 2444 | = (S_GET_VALUE (fixP->fx_subsy) |
| 2445 | - fixP->fx_frag->fr_address- fixP->fx_where); |
| 2446 | fixP->fx_subsy = NULL; |
| 2447 | /* Fall through. */ |
| 2448 | case BFD_RELOC_ARC_TLS_GD_CALL: |
| 2449 | /* These two relocs are there just to allow ld to change the tls |
| 2450 | model for this symbol, by patching the code. The offset - |
| 2451 | and scale, if any - will be installed by the linker. */ |
| 2452 | S_SET_THREAD_LOCAL (fixP->fx_addsy); |
| 2453 | break; |
| 2454 | |
| 2455 | case BFD_RELOC_ARC_TLS_LE_S9: |
| 2456 | case BFD_RELOC_ARC_TLS_DTPOFF_S9: |
| 2457 | as_bad (_("TLS_*_S9 relocs are not supported yet")); |
| 2458 | break; |
| 2459 | |
| 2460 | default: |
| 2461 | break; |
| 2462 | } |
| 2463 | |
| 2464 | if (!fixP->fx_done) |
| 2465 | { |
| 2466 | return; |
| 2467 | } |
| 2468 | |
| 2469 | /* Addjust the value if we have a constant. */ |
| 2470 | value += fx_offset; |
| 2471 | |
| 2472 | /* For hosts with longs bigger than 32-bits make sure that the top |
| 2473 | bits of a 32-bit negative value read in by the parser are set, |
| 2474 | so that the correct comparisons are made. */ |
| 2475 | if (value & 0x80000000) |
| 2476 | value |= (-1L << 31); |
| 2477 | |
| 2478 | reloc = fixP->fx_r_type; |
| 2479 | switch (reloc) |
| 2480 | { |
| 2481 | case BFD_RELOC_8: |
| 2482 | case BFD_RELOC_16: |
| 2483 | case BFD_RELOC_24: |
| 2484 | case BFD_RELOC_32: |
| 2485 | case BFD_RELOC_64: |
| 2486 | case BFD_RELOC_ARC_32_PCREL: |
| 2487 | md_number_to_chars (fixpos, value, fixP->fx_size); |
| 2488 | return; |
| 2489 | |
| 2490 | case BFD_RELOC_ARC_GOTPC32: |
| 2491 | /* I cannot fix an GOTPC relocation because I need to relax it |
| 2492 | from ld rx,[pcl,@sym@gotpc] to add rx,pcl,@sym@gotpc. */ |
| 2493 | as_bad (_("Unsupported operation on reloc")); |
| 2494 | return; |
| 2495 | |
| 2496 | case BFD_RELOC_ARC_TLS_DTPOFF: |
| 2497 | case BFD_RELOC_ARC_TLS_LE_32: |
| 2498 | gas_assert (!fixP->fx_addsy); |
| 2499 | gas_assert (!fixP->fx_subsy); |
| 2500 | |
| 2501 | case BFD_RELOC_ARC_GOTOFF: |
| 2502 | case BFD_RELOC_ARC_32_ME: |
| 2503 | case BFD_RELOC_ARC_PC32: |
| 2504 | md_number_to_chars_midend (fixpos, value, fixP->fx_size); |
| 2505 | return; |
| 2506 | |
| 2507 | case BFD_RELOC_ARC_PLT32: |
| 2508 | md_number_to_chars_midend (fixpos, value, fixP->fx_size); |
| 2509 | return; |
| 2510 | |
| 2511 | case BFD_RELOC_ARC_S25H_PCREL_PLT: |
| 2512 | reloc = BFD_RELOC_ARC_S25W_PCREL; |
| 2513 | goto solve_plt; |
| 2514 | |
| 2515 | case BFD_RELOC_ARC_S21H_PCREL_PLT: |
| 2516 | reloc = BFD_RELOC_ARC_S21H_PCREL; |
| 2517 | goto solve_plt; |
| 2518 | |
| 2519 | case BFD_RELOC_ARC_S25W_PCREL_PLT: |
| 2520 | reloc = BFD_RELOC_ARC_S25W_PCREL; |
| 2521 | goto solve_plt; |
| 2522 | |
| 2523 | case BFD_RELOC_ARC_S21W_PCREL_PLT: |
| 2524 | reloc = BFD_RELOC_ARC_S21W_PCREL; |
| 2525 | |
| 2526 | case BFD_RELOC_ARC_S25W_PCREL: |
| 2527 | case BFD_RELOC_ARC_S21W_PCREL: |
| 2528 | case BFD_RELOC_ARC_S21H_PCREL: |
| 2529 | case BFD_RELOC_ARC_S25H_PCREL: |
| 2530 | case BFD_RELOC_ARC_S13_PCREL: |
| 2531 | solve_plt: |
| 2532 | operand = find_operand_for_reloc (reloc); |
| 2533 | gas_assert (operand); |
| 2534 | break; |
| 2535 | |
| 2536 | default: |
| 2537 | { |
| 2538 | if ((int) fixP->fx_r_type >= 0) |
| 2539 | as_fatal (_("unhandled relocation type %s"), |
| 2540 | bfd_get_reloc_code_name (fixP->fx_r_type)); |
| 2541 | |
| 2542 | /* The rest of these fixups needs to be completely resolved as |
| 2543 | constants. */ |
| 2544 | if (fixP->fx_addsy != 0 |
| 2545 | && S_GET_SEGMENT (fixP->fx_addsy) != absolute_section) |
| 2546 | as_bad_where (fixP->fx_file, fixP->fx_line, |
| 2547 | _("non-absolute expression in constant field")); |
| 2548 | |
| 2549 | gas_assert (-(int) fixP->fx_r_type < (int) arc_num_operands); |
| 2550 | operand = &arc_operands[-(int) fixP->fx_r_type]; |
| 2551 | break; |
| 2552 | } |
| 2553 | } |
| 2554 | |
| 2555 | if (target_big_endian) |
| 2556 | { |
| 2557 | switch (fixP->fx_size) |
| 2558 | { |
| 2559 | case 4: |
| 2560 | insn = bfd_getb32 (fixpos); |
| 2561 | break; |
| 2562 | case 2: |
| 2563 | insn = bfd_getb16 (fixpos); |
| 2564 | break; |
| 2565 | default: |
| 2566 | as_bad_where (fixP->fx_file, fixP->fx_line, |
| 2567 | _("unknown fixup size")); |
| 2568 | } |
| 2569 | } |
| 2570 | else |
| 2571 | { |
| 2572 | insn = 0; |
| 2573 | switch (fixP->fx_size) |
| 2574 | { |
| 2575 | case 4: |
| 2576 | insn = bfd_getl16 (fixpos) << 16 | bfd_getl16 (fixpos + 2); |
| 2577 | break; |
| 2578 | case 2: |
| 2579 | insn = bfd_getl16 (fixpos); |
| 2580 | break; |
| 2581 | default: |
| 2582 | as_bad_where (fixP->fx_file, fixP->fx_line, |
| 2583 | _("unknown fixup size")); |
| 2584 | } |
| 2585 | } |
| 2586 | |
| 2587 | insn = insert_operand (insn, operand, (offsetT) value, |
| 2588 | fixP->fx_file, fixP->fx_line); |
| 2589 | |
| 2590 | md_number_to_chars_midend (fixpos, insn, fixP->fx_size); |
| 2591 | } |
| 2592 | |
| 2593 | /* Prepare machine-dependent frags for relaxation. |
| 2594 | |
| 2595 | Called just before relaxation starts. Any symbol that is now undefined |
| 2596 | will not become defined. |
| 2597 | |
| 2598 | Return the correct fr_subtype in the frag. |
| 2599 | |
| 2600 | Return the initial "guess for fr_var" to caller. The guess for fr_var |
| 2601 | is *actually* the growth beyond fr_fix. Whatever we do to grow fr_fix |
| 2602 | or fr_var contributes to our returned value. |
| 2603 | |
| 2604 | Although it may not be explicit in the frag, pretend |
| 2605 | fr_var starts with a value. */ |
| 2606 | |
| 2607 | int |
| 2608 | md_estimate_size_before_relax (fragS *fragP, |
| 2609 | segT segment) |
| 2610 | { |
| 2611 | int growth; |
| 2612 | |
| 2613 | /* If the symbol is not located within the same section AND it's not |
| 2614 | an absolute section, use the maximum. OR if the symbol is a |
| 2615 | constant AND the insn is by nature not pc-rel, use the maximum. |
| 2616 | OR if the symbol is being equated against another symbol, use the |
| 2617 | maximum. OR if the symbol is weak use the maximum. */ |
| 2618 | if ((S_GET_SEGMENT (fragP->fr_symbol) != segment |
| 2619 | && S_GET_SEGMENT (fragP->fr_symbol) != absolute_section) |
| 2620 | || (symbol_constant_p (fragP->fr_symbol) |
| 2621 | && !fragP->tc_frag_data.pcrel) |
| 2622 | || symbol_equated_p (fragP->fr_symbol) |
| 2623 | || S_IS_WEAK (fragP->fr_symbol)) |
| 2624 | { |
| 2625 | while (md_relax_table[fragP->fr_subtype].rlx_more != ARC_RLX_NONE) |
| 2626 | ++fragP->fr_subtype; |
| 2627 | } |
| 2628 | |
| 2629 | growth = md_relax_table[fragP->fr_subtype].rlx_length; |
| 2630 | fragP->fr_var = growth; |
| 2631 | |
| 2632 | pr_debug ("%s:%d: md_estimate_size_before_relax: %d\n", |
| 2633 | fragP->fr_file, fragP->fr_line, growth); |
| 2634 | |
| 2635 | return growth; |
| 2636 | } |
| 2637 | |
| 2638 | /* Translate internal representation of relocation info to BFD target |
| 2639 | format. */ |
| 2640 | |
| 2641 | arelent * |
| 2642 | tc_gen_reloc (asection *section ATTRIBUTE_UNUSED, |
| 2643 | fixS *fixP) |
| 2644 | { |
| 2645 | arelent *reloc; |
| 2646 | bfd_reloc_code_real_type code; |
| 2647 | |
| 2648 | reloc = (arelent *) xmalloc (sizeof (* reloc)); |
| 2649 | reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *)); |
| 2650 | *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixP->fx_addsy); |
| 2651 | reloc->address = fixP->fx_frag->fr_address + fixP->fx_where; |
| 2652 | |
| 2653 | /* Make sure none of our internal relocations make it this far. |
| 2654 | They'd better have been fully resolved by this point. */ |
| 2655 | gas_assert ((int) fixP->fx_r_type > 0); |
| 2656 | |
| 2657 | code = fixP->fx_r_type; |
| 2658 | |
| 2659 | /* if we have something like add gp, pcl, |
| 2660 | _GLOBAL_OFFSET_TABLE_@gotpc. */ |
| 2661 | if (code == BFD_RELOC_ARC_GOTPC32 |
| 2662 | && GOT_symbol |
| 2663 | && fixP->fx_addsy == GOT_symbol) |
| 2664 | code = BFD_RELOC_ARC_GOTPC; |
| 2665 | |
| 2666 | reloc->howto = bfd_reloc_type_lookup (stdoutput, code); |
| 2667 | if (reloc->howto == NULL) |
| 2668 | { |
| 2669 | as_bad_where (fixP->fx_file, fixP->fx_line, |
| 2670 | _("cannot represent `%s' relocation in object file"), |
| 2671 | bfd_get_reloc_code_name (code)); |
| 2672 | return NULL; |
| 2673 | } |
| 2674 | |
| 2675 | if (!fixP->fx_pcrel != !reloc->howto->pc_relative) |
| 2676 | as_fatal (_("internal error? cannot generate `%s' relocation"), |
| 2677 | bfd_get_reloc_code_name (code)); |
| 2678 | |
| 2679 | gas_assert (!fixP->fx_pcrel == !reloc->howto->pc_relative); |
| 2680 | |
| 2681 | if (code == BFD_RELOC_ARC_TLS_DTPOFF |
| 2682 | || code == BFD_RELOC_ARC_TLS_DTPOFF_S9) |
| 2683 | { |
| 2684 | asymbol *sym |
| 2685 | = fixP->fx_subsy ? symbol_get_bfdsym (fixP->fx_subsy) : NULL; |
| 2686 | /* We just want to store a 24 bit index, but we have to wait |
| 2687 | till after write_contents has been called via |
| 2688 | bfd_map_over_sections before we can get the index from |
| 2689 | _bfd_elf_symbol_from_bfd_symbol. Thus, the write_relocs |
| 2690 | function is elf32-arc.c has to pick up the slack. |
| 2691 | Unfortunately, this leads to problems with hosts that have |
| 2692 | pointers wider than long (bfd_vma). There would be various |
| 2693 | ways to handle this, all error-prone :-( */ |
| 2694 | reloc->addend = (bfd_vma) sym; |
| 2695 | if ((asymbol *) reloc->addend != sym) |
| 2696 | { |
| 2697 | as_bad ("Can't store pointer\n"); |
| 2698 | return NULL; |
| 2699 | } |
| 2700 | } |
| 2701 | else |
| 2702 | reloc->addend = fixP->fx_offset; |
| 2703 | |
| 2704 | return reloc; |
| 2705 | } |
| 2706 | |
| 2707 | /* Perform post-processing of machine-dependent frags after relaxation. |
| 2708 | Called after relaxation is finished. |
| 2709 | In: Address of frag. |
| 2710 | fr_type == rs_machine_dependent. |
| 2711 | fr_subtype is what the address relaxed to. |
| 2712 | |
| 2713 | Out: Any fixS:s and constants are set up. */ |
| 2714 | |
| 2715 | void |
| 2716 | md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED, |
| 2717 | segT segment ATTRIBUTE_UNUSED, |
| 2718 | fragS *fragP) |
| 2719 | { |
| 2720 | const relax_typeS *table_entry; |
| 2721 | char *dest; |
| 2722 | const struct arc_opcode *opcode; |
| 2723 | struct arc_insn insn; |
| 2724 | int size, fix; |
| 2725 | struct arc_relax_type *relax_arg = &fragP->tc_frag_data; |
| 2726 | |
| 2727 | fix = (fragP->fr_fix < 0 ? 0 : fragP->fr_fix); |
| 2728 | dest = fragP->fr_literal + fix; |
| 2729 | table_entry = TC_GENERIC_RELAX_TABLE + fragP->fr_subtype; |
| 2730 | |
| 2731 | pr_debug ("%s:%d: md_convert_frag, subtype: %d, fix: %d, var: %d\n", |
| 2732 | fragP->fr_file, fragP->fr_line, |
| 2733 | fragP->fr_subtype, fix, fragP->fr_var); |
| 2734 | |
| 2735 | if (fragP->fr_subtype <= 0 |
| 2736 | && fragP->fr_subtype >= arc_num_relax_opcodes) |
| 2737 | as_fatal (_("no relaxation found for this instruction.")); |
| 2738 | |
| 2739 | opcode = &arc_relax_opcodes[fragP->fr_subtype]; |
| 2740 | |
| 2741 | assemble_insn (opcode, relax_arg->tok, relax_arg->ntok, relax_arg->pflags, |
| 2742 | relax_arg->nflg, &insn); |
| 2743 | |
| 2744 | apply_fixups (&insn, fragP, fix); |
| 2745 | |
| 2746 | size = insn.short_insn ? (insn.has_limm ? 6 : 2) : (insn.has_limm ? 8 : 4); |
| 2747 | gas_assert (table_entry->rlx_length == size); |
| 2748 | emit_insn0 (&insn, dest, TRUE); |
| 2749 | |
| 2750 | fragP->fr_fix += table_entry->rlx_length; |
| 2751 | fragP->fr_var = 0; |
| 2752 | } |
| 2753 | |
| 2754 | /* We have no need to default values of symbols. We could catch |
| 2755 | register names here, but that is handled by inserting them all in |
| 2756 | the symbol table to begin with. */ |
| 2757 | |
| 2758 | symbolS * |
| 2759 | md_undefined_symbol (char *name) |
| 2760 | { |
| 2761 | /* The arc abi demands that a GOT[0] should be referencible as |
| 2762 | [pc+_DYNAMIC@gotpc]. Hence we convert a _DYNAMIC@gotpc to a |
| 2763 | GOTPC reference to _GLOBAL_OFFSET_TABLE_. */ |
| 2764 | if (((*name == '_') |
| 2765 | && (*(name+1) == 'G') |
| 2766 | && (strcmp (name, GLOBAL_OFFSET_TABLE_NAME) == 0)) |
| 2767 | || ((*name == '_') |
| 2768 | && (*(name+1) == 'D') |
| 2769 | && (strcmp (name, DYNAMIC_STRUCT_NAME) == 0))) |
| 2770 | { |
| 2771 | if (!GOT_symbol) |
| 2772 | { |
| 2773 | if (symbol_find (name)) |
| 2774 | as_bad ("GOT already in symbol table"); |
| 2775 | |
| 2776 | GOT_symbol = symbol_new (GLOBAL_OFFSET_TABLE_NAME, undefined_section, |
| 2777 | (valueT) 0, &zero_address_frag); |
| 2778 | }; |
| 2779 | return GOT_symbol; |
| 2780 | } |
| 2781 | return NULL; |
| 2782 | } |
| 2783 | |
| 2784 | /* Turn a string in input_line_pointer into a floating point constant |
| 2785 | of type type, and store the appropriate bytes in *litP. The number |
| 2786 | of LITTLENUMS emitted is stored in *sizeP. An error message is |
| 2787 | returned, or NULL on OK. */ |
| 2788 | |
| 2789 | char * |
| 2790 | md_atof (int type, char *litP, int *sizeP) |
| 2791 | { |
| 2792 | return ieee_md_atof (type, litP, sizeP, target_big_endian); |
| 2793 | } |
| 2794 | |
| 2795 | /* Called for any expression that can not be recognized. When the |
| 2796 | function is called, `input_line_pointer' will point to the start of |
| 2797 | the expression. */ |
| 2798 | |
| 2799 | void |
| 2800 | md_operand (expressionS *expressionP ATTRIBUTE_UNUSED) |
| 2801 | { |
| 2802 | char *p = input_line_pointer; |
| 2803 | if (*p == '@') |
| 2804 | { |
| 2805 | input_line_pointer++; |
| 2806 | expressionP->X_op = O_symbol; |
| 2807 | expression (expressionP); |
| 2808 | } |
| 2809 | } |
| 2810 | |
| 2811 | /* This function is called from the function 'expression', it attempts |
| 2812 | to parse special names (in our case register names). It fills in |
| 2813 | the expression with the identified register. It returns TRUE if |
| 2814 | it is a register and FALSE otherwise. */ |
| 2815 | |
| 2816 | bfd_boolean |
| 2817 | arc_parse_name (const char *name, |
| 2818 | struct expressionS *e) |
| 2819 | { |
| 2820 | struct symbol *sym; |
| 2821 | |
| 2822 | if (!assembling_insn) |
| 2823 | return FALSE; |
| 2824 | |
| 2825 | /* Handle only registers. */ |
| 2826 | if (e->X_op != O_absent) |
| 2827 | return FALSE; |
| 2828 | |
| 2829 | sym = hash_find (arc_reg_hash, name); |
| 2830 | if (sym) |
| 2831 | { |
| 2832 | e->X_op = O_register; |
| 2833 | e->X_add_number = S_GET_VALUE (sym); |
| 2834 | return TRUE; |
| 2835 | } |
| 2836 | return FALSE; |
| 2837 | } |
| 2838 | |
| 2839 | /* md_parse_option |
| 2840 | Invocation line includes a switch not recognized by the base assembler. |
| 2841 | See if it's a processor-specific option. |
| 2842 | |
| 2843 | New options (supported) are: |
| 2844 | |
| 2845 | -mcpu=<cpu name> Assemble for selected processor |
| 2846 | -EB/-mbig-endian Big-endian |
| 2847 | -EL/-mlittle-endian Little-endian |
| 2848 | -mrelax Enable relaxation |
| 2849 | |
| 2850 | The following CPU names are recognized: |
| 2851 | arc700, av2em, av2hs. */ |
| 2852 | |
| 2853 | int |
| 2854 | md_parse_option (int c, char *arg ATTRIBUTE_UNUSED) |
| 2855 | { |
| 2856 | int cpu_flags = EF_ARC_CPU_GENERIC; |
| 2857 | |
| 2858 | switch (c) |
| 2859 | { |
| 2860 | case OPTION_ARC600: |
| 2861 | case OPTION_ARC601: |
| 2862 | return md_parse_option (OPTION_MCPU, "arc600"); |
| 2863 | |
| 2864 | case OPTION_ARC700: |
| 2865 | return md_parse_option (OPTION_MCPU, "arc700"); |
| 2866 | |
| 2867 | case OPTION_ARCEM: |
| 2868 | return md_parse_option (OPTION_MCPU, "arcem"); |
| 2869 | |
| 2870 | case OPTION_ARCHS: |
| 2871 | return md_parse_option (OPTION_MCPU, "archs"); |
| 2872 | |
| 2873 | case OPTION_MCPU: |
| 2874 | { |
| 2875 | int i; |
| 2876 | char *s = alloca (strlen (arg) + 1); |
| 2877 | |
| 2878 | { |
| 2879 | char *t = s; |
| 2880 | char *arg1 = arg; |
| 2881 | |
| 2882 | do |
| 2883 | *t = TOLOWER (*arg1++); |
| 2884 | while (*t++); |
| 2885 | } |
| 2886 | |
| 2887 | for (i = 0; cpu_types[i].name; ++i) |
| 2888 | { |
| 2889 | if (!strcmp (cpu_types[i].name, s)) |
| 2890 | { |
| 2891 | arc_target = cpu_types[i].flags; |
| 2892 | arc_target_name = cpu_types[i].name; |
| 2893 | arc_features = cpu_types[i].features; |
| 2894 | arc_mach_type = cpu_types[i].mach; |
| 2895 | cpu_flags = cpu_types[i].eflags; |
| 2896 | |
| 2897 | mach_type_specified_p = 1; |
| 2898 | break; |
| 2899 | } |
| 2900 | } |
| 2901 | |
| 2902 | if (!cpu_types[i].name) |
| 2903 | { |
| 2904 | as_fatal (_("unknown architecture: %s\n"), arg); |
| 2905 | } |
| 2906 | break; |
| 2907 | } |
| 2908 | |
| 2909 | case OPTION_EB: |
| 2910 | arc_target_format = "elf32-bigarc"; |
| 2911 | byte_order = BIG_ENDIAN; |
| 2912 | break; |
| 2913 | |
| 2914 | case OPTION_EL: |
| 2915 | arc_target_format = "elf32-littlearc"; |
| 2916 | byte_order = LITTLE_ENDIAN; |
| 2917 | break; |
| 2918 | |
| 2919 | case OPTION_CD: |
| 2920 | /* This option has an effect only on ARC EM. */ |
| 2921 | if (arc_target & ARC_OPCODE_ARCv2EM) |
| 2922 | arc_features |= ARC_CD; |
| 2923 | break; |
| 2924 | |
| 2925 | case OPTION_RELAX: |
| 2926 | relaxation_state = 1; |
| 2927 | break; |
| 2928 | |
| 2929 | case OPTION_USER_MODE: |
| 2930 | case OPTION_LD_EXT_MASK: |
| 2931 | case OPTION_SWAP: |
| 2932 | case OPTION_NORM: |
| 2933 | case OPTION_BARREL_SHIFT: |
| 2934 | case OPTION_MIN_MAX: |
| 2935 | case OPTION_NO_MPY: |
| 2936 | case OPTION_EA: |
| 2937 | case OPTION_MUL64: |
| 2938 | case OPTION_SIMD: |
| 2939 | case OPTION_SPFP: |
| 2940 | case OPTION_DPFP: |
| 2941 | case OPTION_XMAC_D16: |
| 2942 | case OPTION_XMAC_24: |
| 2943 | case OPTION_DSP_PACKA: |
| 2944 | case OPTION_CRC: |
| 2945 | case OPTION_DVBF: |
| 2946 | case OPTION_TELEPHONY: |
| 2947 | case OPTION_XYMEMORY: |
| 2948 | case OPTION_LOCK: |
| 2949 | case OPTION_SWAPE: |
| 2950 | case OPTION_RTSC: |
| 2951 | case OPTION_FPUDA: |
| 2952 | /* Dummy options are accepted but have no effect. */ |
| 2953 | break; |
| 2954 | |
| 2955 | default: |
| 2956 | return 0; |
| 2957 | } |
| 2958 | |
| 2959 | if (cpu_flags != EF_ARC_CPU_GENERIC) |
| 2960 | arc_eflag = (arc_eflag & ~EF_ARC_MACH_MSK) | cpu_flags; |
| 2961 | |
| 2962 | return 1; |
| 2963 | } |
| 2964 | |
| 2965 | void |
| 2966 | md_show_usage (FILE *stream) |
| 2967 | { |
| 2968 | fprintf (stream, _("ARC-specific assembler options:\n")); |
| 2969 | |
| 2970 | fprintf (stream, " -mcpu=<cpu name>\t assemble for CPU <cpu name>\n"); |
| 2971 | fprintf (stream, |
| 2972 | " -mcode-density\t enable code density option for ARC EM\n"); |
| 2973 | |
| 2974 | fprintf (stream, _("\ |
| 2975 | -EB assemble code for a big-endian cpu\n")); |
| 2976 | fprintf (stream, _("\ |
| 2977 | -EL assemble code for a little-endian cpu\n")); |
| 2978 | fprintf (stream, _("\ |
| 2979 | -mrelax Enable relaxation\n")); |
| 2980 | |
| 2981 | } |
| 2982 | |
| 2983 | /* Find the proper relocation for the given opcode. */ |
| 2984 | |
| 2985 | static extended_bfd_reloc_code_real_type |
| 2986 | find_reloc (const char *name, |
| 2987 | const char *opcodename, |
| 2988 | const struct arc_flags *pflags, |
| 2989 | int nflg, |
| 2990 | extended_bfd_reloc_code_real_type reloc) |
| 2991 | { |
| 2992 | unsigned int i; |
| 2993 | int j; |
| 2994 | bfd_boolean found_flag, tmp; |
| 2995 | extended_bfd_reloc_code_real_type ret = BFD_RELOC_UNUSED; |
| 2996 | |
| 2997 | for (i = 0; i < arc_num_equiv_tab; i++) |
| 2998 | { |
| 2999 | const struct arc_reloc_equiv_tab *r = &arc_reloc_equiv[i]; |
| 3000 | |
| 3001 | /* Find the entry. */ |
| 3002 | if (strcmp (name, r->name)) |
| 3003 | continue; |
| 3004 | if (r->mnemonic && (strcmp (r->mnemonic, opcodename))) |
| 3005 | continue; |
| 3006 | if (r->flags[0]) |
| 3007 | { |
| 3008 | if (!nflg) |
| 3009 | continue; |
| 3010 | found_flag = FALSE; |
| 3011 | unsigned * psflg = (unsigned *)r->flags; |
| 3012 | do |
| 3013 | { |
| 3014 | tmp = FALSE; |
| 3015 | for (j = 0; j < nflg; j++) |
| 3016 | if (!strcmp (pflags[j].name, |
| 3017 | arc_flag_operands[*psflg].name)) |
| 3018 | { |
| 3019 | tmp = TRUE; |
| 3020 | break; |
| 3021 | } |
| 3022 | if (!tmp) |
| 3023 | { |
| 3024 | found_flag = FALSE; |
| 3025 | break; |
| 3026 | } |
| 3027 | else |
| 3028 | { |
| 3029 | found_flag = TRUE; |
| 3030 | } |
| 3031 | ++ psflg; |
| 3032 | } while (*psflg); |
| 3033 | |
| 3034 | if (!found_flag) |
| 3035 | continue; |
| 3036 | } |
| 3037 | |
| 3038 | if (reloc != r->oldreloc) |
| 3039 | continue; |
| 3040 | /* Found it. */ |
| 3041 | ret = r->newreloc; |
| 3042 | break; |
| 3043 | } |
| 3044 | |
| 3045 | if (ret == BFD_RELOC_UNUSED) |
| 3046 | as_bad (_("Unable to find %s relocation for instruction %s"), |
| 3047 | name, opcodename); |
| 3048 | return ret; |
| 3049 | } |
| 3050 | |
| 3051 | /* All the symbol types that are allowed to be used for |
| 3052 | relaxation. */ |
| 3053 | |
| 3054 | static bfd_boolean |
| 3055 | may_relax_expr (expressionS tok) |
| 3056 | { |
| 3057 | /* Check if we have unrelaxable relocs. */ |
| 3058 | switch (tok.X_md) |
| 3059 | { |
| 3060 | default: |
| 3061 | break; |
| 3062 | case O_plt: |
| 3063 | return FALSE; |
| 3064 | } |
| 3065 | |
| 3066 | switch (tok.X_op) |
| 3067 | { |
| 3068 | case O_symbol: |
| 3069 | case O_multiply: |
| 3070 | case O_divide: |
| 3071 | case O_modulus: |
| 3072 | case O_add: |
| 3073 | case O_subtract: |
| 3074 | break; |
| 3075 | |
| 3076 | default: |
| 3077 | return FALSE; |
| 3078 | } |
| 3079 | return TRUE; |
| 3080 | } |
| 3081 | |
| 3082 | /* Checks if flags are in line with relaxable insn. */ |
| 3083 | |
| 3084 | static bfd_boolean |
| 3085 | relaxable_flag (const struct arc_relaxable_ins *ins, |
| 3086 | const struct arc_flags *pflags, |
| 3087 | int nflgs) |
| 3088 | { |
| 3089 | unsigned flag_class, |
| 3090 | flag, |
| 3091 | flag_class_idx = 0, |
| 3092 | flag_idx = 0; |
| 3093 | |
| 3094 | const struct arc_flag_operand *flag_opand; |
| 3095 | int i, counttrue = 0; |
| 3096 | |
| 3097 | /* Iterate through flags classes. */ |
| 3098 | while ((flag_class = ins->flag_classes[flag_class_idx]) != 0) |
| 3099 | { |
| 3100 | /* Iterate through flags in flag class. */ |
| 3101 | while ((flag = arc_flag_classes[flag_class].flags[flag_idx]) |
| 3102 | != 0) |
| 3103 | { |
| 3104 | flag_opand = &arc_flag_operands[flag]; |
| 3105 | /* Iterate through flags in ins to compare. */ |
| 3106 | for (i = 0; i < nflgs; ++i) |
| 3107 | { |
| 3108 | if (strcmp (flag_opand->name, pflags[i].name) == 0) |
| 3109 | ++counttrue; |
| 3110 | } |
| 3111 | |
| 3112 | ++flag_idx; |
| 3113 | } |
| 3114 | |
| 3115 | ++flag_class_idx; |
| 3116 | flag_idx = 0; |
| 3117 | } |
| 3118 | |
| 3119 | /* If counttrue == nflgs, then all flags have been found. */ |
| 3120 | return (counttrue == nflgs ? TRUE : FALSE); |
| 3121 | } |
| 3122 | |
| 3123 | /* Checks if operands are in line with relaxable insn. */ |
| 3124 | |
| 3125 | static bfd_boolean |
| 3126 | relaxable_operand (const struct arc_relaxable_ins *ins, |
| 3127 | const expressionS *tok, |
| 3128 | int ntok) |
| 3129 | { |
| 3130 | const enum rlx_operand_type *operand = &ins->operands[0]; |
| 3131 | int i = 0; |
| 3132 | |
| 3133 | while (*operand != EMPTY) |
| 3134 | { |
| 3135 | const expressionS *epr = &tok[i]; |
| 3136 | |
| 3137 | if (i != 0 && i >= ntok) |
| 3138 | return FALSE; |
| 3139 | |
| 3140 | switch (*operand) |
| 3141 | { |
| 3142 | case IMMEDIATE: |
| 3143 | if (!(epr->X_op == O_multiply |
| 3144 | || epr->X_op == O_divide |
| 3145 | || epr->X_op == O_modulus |
| 3146 | || epr->X_op == O_add |
| 3147 | || epr->X_op == O_subtract |
| 3148 | || epr->X_op == O_symbol)) |
| 3149 | return FALSE; |
| 3150 | break; |
| 3151 | |
| 3152 | case REGISTER_DUP: |
| 3153 | if ((i <= 0) |
| 3154 | || (epr->X_add_number != tok[i - 1].X_add_number)) |
| 3155 | return FALSE; |
| 3156 | /* Fall through. */ |
| 3157 | case REGISTER: |
| 3158 | if (epr->X_op != O_register) |
| 3159 | return FALSE; |
| 3160 | break; |
| 3161 | |
| 3162 | case REGISTER_S: |
| 3163 | if (epr->X_op != O_register) |
| 3164 | return FALSE; |
| 3165 | |
| 3166 | switch (epr->X_add_number) |
| 3167 | { |
| 3168 | case 0: case 1: case 2: case 3: |
| 3169 | case 12: case 13: case 14: case 15: |
| 3170 | break; |
| 3171 | default: |
| 3172 | return FALSE; |
| 3173 | } |
| 3174 | break; |
| 3175 | |
| 3176 | case REGISTER_NO_GP: |
| 3177 | if ((epr->X_op != O_register) |
| 3178 | || (epr->X_add_number == 26)) /* 26 is the gp register. */ |
| 3179 | return FALSE; |
| 3180 | break; |
| 3181 | |
| 3182 | case BRACKET: |
| 3183 | if (epr->X_op != O_bracket) |
| 3184 | return FALSE; |
| 3185 | break; |
| 3186 | |
| 3187 | default: |
| 3188 | /* Don't understand, bail out. */ |
| 3189 | return FALSE; |
| 3190 | break; |
| 3191 | } |
| 3192 | |
| 3193 | ++i; |
| 3194 | operand = &ins->operands[i]; |
| 3195 | } |
| 3196 | |
| 3197 | return (i == ntok ? TRUE : FALSE); |
| 3198 | } |
| 3199 | |
| 3200 | /* Return TRUE if this OPDCODE is a candidate for relaxation. */ |
| 3201 | |
| 3202 | static bfd_boolean |
| 3203 | relax_insn_p (const struct arc_opcode *opcode, |
| 3204 | const expressionS *tok, |
| 3205 | int ntok, |
| 3206 | const struct arc_flags *pflags, |
| 3207 | int nflg) |
| 3208 | { |
| 3209 | unsigned i; |
| 3210 | bfd_boolean rv = FALSE; |
| 3211 | |
| 3212 | /* Check the relaxation table. */ |
| 3213 | for (i = 0; i < arc_num_relaxable_ins && relaxation_state; ++i) |
| 3214 | { |
| 3215 | const struct arc_relaxable_ins *arc_rlx_ins = &arc_relaxable_insns[i]; |
| 3216 | |
| 3217 | if ((strcmp (opcode->name, arc_rlx_ins->mnemonic_r) == 0) |
| 3218 | && may_relax_expr (tok[arc_rlx_ins->opcheckidx]) |
| 3219 | && relaxable_operand (arc_rlx_ins, tok, ntok) |
| 3220 | && relaxable_flag (arc_rlx_ins, pflags, nflg)) |
| 3221 | { |
| 3222 | rv = TRUE; |
| 3223 | frag_now->fr_subtype = arc_relaxable_insns[i].subtype; |
| 3224 | memcpy (&frag_now->tc_frag_data.tok, tok, |
| 3225 | sizeof (expressionS) * ntok); |
| 3226 | memcpy (&frag_now->tc_frag_data.pflags, pflags, |
| 3227 | sizeof (struct arc_flags) * nflg); |
| 3228 | frag_now->tc_frag_data.nflg = nflg; |
| 3229 | frag_now->tc_frag_data.ntok = ntok; |
| 3230 | break; |
| 3231 | } |
| 3232 | } |
| 3233 | |
| 3234 | return rv; |
| 3235 | } |
| 3236 | |
| 3237 | /* Turn an opcode description and a set of arguments into |
| 3238 | an instruction and a fixup. */ |
| 3239 | |
| 3240 | static void |
| 3241 | assemble_insn (const struct arc_opcode *opcode, |
| 3242 | const expressionS *tok, |
| 3243 | int ntok, |
| 3244 | const struct arc_flags *pflags, |
| 3245 | int nflg, |
| 3246 | struct arc_insn *insn) |
| 3247 | { |
| 3248 | const expressionS *reloc_exp = NULL; |
| 3249 | unsigned image; |
| 3250 | const unsigned char *argidx; |
| 3251 | int i; |
| 3252 | int tokidx = 0; |
| 3253 | unsigned char pcrel = 0; |
| 3254 | bfd_boolean needGOTSymbol; |
| 3255 | bfd_boolean has_delay_slot = FALSE; |
| 3256 | extended_bfd_reloc_code_real_type reloc = BFD_RELOC_UNUSED; |
| 3257 | |
| 3258 | memset (insn, 0, sizeof (*insn)); |
| 3259 | image = opcode->opcode; |
| 3260 | |
| 3261 | pr_debug ("%s:%d: assemble_insn: %s using opcode %x\n", |
| 3262 | frag_now->fr_file, frag_now->fr_line, opcode->name, |
| 3263 | opcode->opcode); |
| 3264 | |
| 3265 | /* Handle operands. */ |
| 3266 | for (argidx = opcode->operands; *argidx; ++argidx) |
| 3267 | { |
| 3268 | const struct arc_operand *operand = &arc_operands[*argidx]; |
| 3269 | const expressionS *t = (const expressionS *) 0; |
| 3270 | |
| 3271 | if ((operand->flags & ARC_OPERAND_FAKE) |
| 3272 | && !(operand->flags & ARC_OPERAND_BRAKET)) |
| 3273 | continue; |
| 3274 | |
| 3275 | if (operand->flags & ARC_OPERAND_DUPLICATE) |
| 3276 | { |
| 3277 | /* Duplicate operand, already inserted. */ |
| 3278 | tokidx ++; |
| 3279 | continue; |
| 3280 | } |
| 3281 | |
| 3282 | if (tokidx >= ntok) |
| 3283 | { |
| 3284 | abort (); |
| 3285 | } |
| 3286 | else |
| 3287 | t = &tok[tokidx++]; |
| 3288 | |
| 3289 | /* Regardless if we have a reloc or not mark the instruction |
| 3290 | limm if it is the case. */ |
| 3291 | if (operand->flags & ARC_OPERAND_LIMM) |
| 3292 | insn->has_limm = TRUE; |
| 3293 | |
| 3294 | switch (t->X_op) |
| 3295 | { |
| 3296 | case O_register: |
| 3297 | image = insert_operand (image, operand, regno (t->X_add_number), |
| 3298 | NULL, 0); |
| 3299 | break; |
| 3300 | |
| 3301 | case O_constant: |
| 3302 | image = insert_operand (image, operand, t->X_add_number, NULL, 0); |
| 3303 | reloc_exp = t; |
| 3304 | if (operand->flags & ARC_OPERAND_LIMM) |
| 3305 | insn->limm = t->X_add_number; |
| 3306 | break; |
| 3307 | |
| 3308 | case O_bracket: |
| 3309 | /* Ignore brackets. */ |
| 3310 | break; |
| 3311 | |
| 3312 | case O_absent: |
| 3313 | gas_assert (operand->flags & ARC_OPERAND_IGNORE); |
| 3314 | break; |
| 3315 | |
| 3316 | case O_subtract: |
| 3317 | /* Maybe register range. */ |
| 3318 | if ((t->X_add_number == 0) |
| 3319 | && contains_register (t->X_add_symbol) |
| 3320 | && contains_register (t->X_op_symbol)) |
| 3321 | { |
| 3322 | int regs; |
| 3323 | |
| 3324 | regs = get_register (t->X_add_symbol); |
| 3325 | regs <<= 16; |
| 3326 | regs |= get_register (t->X_op_symbol); |
| 3327 | image = insert_operand (image, operand, regs, NULL, 0); |
| 3328 | break; |
| 3329 | } |
| 3330 | |
| 3331 | default: |
| 3332 | /* This operand needs a relocation. */ |
| 3333 | needGOTSymbol = FALSE; |
| 3334 | |
| 3335 | switch (t->X_md) |
| 3336 | { |
| 3337 | case O_plt: |
| 3338 | needGOTSymbol = TRUE; |
| 3339 | reloc = find_reloc ("plt", opcode->name, |
| 3340 | pflags, nflg, |
| 3341 | operand->default_reloc); |
| 3342 | break; |
| 3343 | |
| 3344 | case O_gotoff: |
| 3345 | case O_gotpc: |
| 3346 | needGOTSymbol = TRUE; |
| 3347 | reloc = ARC_RELOC_TABLE (t->X_md)->reloc; |
| 3348 | break; |
| 3349 | case O_pcl: |
| 3350 | reloc = ARC_RELOC_TABLE (t->X_md)->reloc; |
| 3351 | if (ARC_SHORT (opcode->mask)) |
| 3352 | as_bad_where (frag_now->fr_file, frag_now->fr_line, |
| 3353 | _("Unable to use @pcl relocation for insn %s"), |
| 3354 | opcode->name); |
| 3355 | break; |
| 3356 | case O_sda: |
| 3357 | reloc = find_reloc ("sda", opcode->name, |
| 3358 | pflags, nflg, |
| 3359 | operand->default_reloc); |
| 3360 | break; |
| 3361 | case O_tlsgd: |
| 3362 | case O_tlsie: |
| 3363 | needGOTSymbol = TRUE; |
| 3364 | /* Fall-through. */ |
| 3365 | |
| 3366 | case O_tpoff: |
| 3367 | case O_dtpoff: |
| 3368 | reloc = ARC_RELOC_TABLE (t->X_md)->reloc; |
| 3369 | break; |
| 3370 | |
| 3371 | case O_tpoff9: /*FIXME! Check for the conditionality of |
| 3372 | the insn. */ |
| 3373 | case O_dtpoff9: /*FIXME! Check for the conditionality of |
| 3374 | the insn. */ |
| 3375 | as_bad (_("TLS_*_S9 relocs are not supported yet")); |
| 3376 | break; |
| 3377 | |
| 3378 | default: |
| 3379 | /* Just consider the default relocation. */ |
| 3380 | reloc = operand->default_reloc; |
| 3381 | break; |
| 3382 | } |
| 3383 | |
| 3384 | if (needGOTSymbol && (GOT_symbol == NULL)) |
| 3385 | GOT_symbol = symbol_find_or_make (GLOBAL_OFFSET_TABLE_NAME); |
| 3386 | |
| 3387 | reloc_exp = t; |
| 3388 | |
| 3389 | #if 0 |
| 3390 | if (reloc > 0) |
| 3391 | { |
| 3392 | /* sanity checks. */ |
| 3393 | reloc_howto_type *reloc_howto |
| 3394 | = bfd_reloc_type_lookup (stdoutput, |
| 3395 | (bfd_reloc_code_real_type) reloc); |
| 3396 | unsigned reloc_bitsize = reloc_howto->bitsize; |
| 3397 | if (reloc_howto->rightshift) |
| 3398 | reloc_bitsize -= reloc_howto->rightshift; |
| 3399 | if (reloc_bitsize != operand->bits) |
| 3400 | { |
| 3401 | as_bad (_("invalid relocation %s for field"), |
| 3402 | bfd_get_reloc_code_name (reloc)); |
| 3403 | return; |
| 3404 | } |
| 3405 | } |
| 3406 | #endif |
| 3407 | if (insn->nfixups >= MAX_INSN_FIXUPS) |
| 3408 | as_fatal (_("too many fixups")); |
| 3409 | |
| 3410 | struct arc_fixup *fixup; |
| 3411 | fixup = &insn->fixups[insn->nfixups++]; |
| 3412 | fixup->exp = *t; |
| 3413 | fixup->reloc = reloc; |
| 3414 | pcrel = (operand->flags & ARC_OPERAND_PCREL) ? 1 : 0; |
| 3415 | fixup->pcrel = pcrel; |
| 3416 | fixup->islong = (operand->flags & ARC_OPERAND_LIMM) ? |
| 3417 | TRUE : FALSE; |
| 3418 | break; |
| 3419 | } |
| 3420 | } |
| 3421 | |
| 3422 | /* Handle flags. */ |
| 3423 | for (i = 0; i < nflg; i++) |
| 3424 | { |
| 3425 | const struct arc_flag_operand *flg_operand = |
| 3426 | &arc_flag_operands[pflags[i].code]; |
| 3427 | |
| 3428 | /* Check if the instruction has a delay slot. */ |
| 3429 | if (!strcmp (flg_operand->name, "d")) |
| 3430 | has_delay_slot = TRUE; |
| 3431 | |
| 3432 | /* There is an exceptional case when we cannot insert a flag |
| 3433 | just as it is. The .T flag must be handled in relation with |
| 3434 | the relative address. */ |
| 3435 | if (!strcmp (flg_operand->name, "t") |
| 3436 | || !strcmp (flg_operand->name, "nt")) |
| 3437 | { |
| 3438 | unsigned bitYoperand = 0; |
| 3439 | /* FIXME! move selection bbit/brcc in arc-opc.c. */ |
| 3440 | if (!strcmp (flg_operand->name, "t")) |
| 3441 | if (!strcmp (opcode->name, "bbit0") |
| 3442 | || !strcmp (opcode->name, "bbit1")) |
| 3443 | bitYoperand = arc_NToperand; |
| 3444 | else |
| 3445 | bitYoperand = arc_Toperand; |
| 3446 | else |
| 3447 | if (!strcmp (opcode->name, "bbit0") |
| 3448 | || !strcmp (opcode->name, "bbit1")) |
| 3449 | bitYoperand = arc_Toperand; |
| 3450 | else |
| 3451 | bitYoperand = arc_NToperand; |
| 3452 | |
| 3453 | gas_assert (reloc_exp != NULL); |
| 3454 | if (reloc_exp->X_op == O_constant) |
| 3455 | { |
| 3456 | /* Check if we have a constant and solved it |
| 3457 | immediately. */ |
| 3458 | offsetT val = reloc_exp->X_add_number; |
| 3459 | image |= insert_operand (image, &arc_operands[bitYoperand], |
| 3460 | val, NULL, 0); |
| 3461 | } |
| 3462 | else |
| 3463 | { |
| 3464 | struct arc_fixup *fixup; |
| 3465 | |
| 3466 | if (insn->nfixups >= MAX_INSN_FIXUPS) |
| 3467 | as_fatal (_("too many fixups")); |
| 3468 | |
| 3469 | fixup = &insn->fixups[insn->nfixups++]; |
| 3470 | fixup->exp = *reloc_exp; |
| 3471 | fixup->reloc = -bitYoperand; |
| 3472 | fixup->pcrel = pcrel; |
| 3473 | fixup->islong = FALSE; |
| 3474 | } |
| 3475 | } |
| 3476 | else |
| 3477 | image |= (flg_operand->code & ((1 << flg_operand->bits) - 1)) |
| 3478 | << flg_operand->shift; |
| 3479 | } |
| 3480 | |
| 3481 | insn->relax = relax_insn_p (opcode, tok, ntok, pflags, nflg); |
| 3482 | |
| 3483 | /* Short instruction? */ |
| 3484 | insn->short_insn = ARC_SHORT (opcode->mask) ? TRUE : FALSE; |
| 3485 | |
| 3486 | insn->insn = image; |
| 3487 | |
| 3488 | /* Update last insn status. */ |
| 3489 | arc_last_insns[1] = arc_last_insns[0]; |
| 3490 | arc_last_insns[0].opcode = opcode; |
| 3491 | arc_last_insns[0].has_limm = insn->has_limm; |
| 3492 | arc_last_insns[0].has_delay_slot = has_delay_slot; |
| 3493 | |
| 3494 | /* Check if the current instruction is legally used. */ |
| 3495 | if (arc_last_insns[1].has_delay_slot |
| 3496 | && is_br_jmp_insn_p (arc_last_insns[0].opcode)) |
| 3497 | as_bad_where (frag_now->fr_file, frag_now->fr_line, |
| 3498 | _("A jump/branch instruction in delay slot.")); |
| 3499 | } |
| 3500 | |
| 3501 | void |
| 3502 | arc_handle_align (fragS* fragP) |
| 3503 | { |
| 3504 | if ((fragP)->fr_type == rs_align_code) |
| 3505 | { |
| 3506 | char *dest = (fragP)->fr_literal + (fragP)->fr_fix; |
| 3507 | valueT count = ((fragP)->fr_next->fr_address |
| 3508 | - (fragP)->fr_address - (fragP)->fr_fix); |
| 3509 | |
| 3510 | (fragP)->fr_var = 2; |
| 3511 | |
| 3512 | if (count & 1)/* Padding in the gap till the next 2-byte |
| 3513 | boundary with 0s. */ |
| 3514 | { |
| 3515 | (fragP)->fr_fix++; |
| 3516 | *dest++ = 0; |
| 3517 | } |
| 3518 | /* Writing nop_s. */ |
| 3519 | md_number_to_chars (dest, NOP_OPCODE_S, 2); |
| 3520 | } |
| 3521 | } |
| 3522 | |
| 3523 | /* Here we decide which fixups can be adjusted to make them relative |
| 3524 | to the beginning of the section instead of the symbol. Basically |
| 3525 | we need to make sure that the dynamic relocations are done |
| 3526 | correctly, so in some cases we force the original symbol to be |
| 3527 | used. */ |
| 3528 | |
| 3529 | int |
| 3530 | tc_arc_fix_adjustable (fixS *fixP) |
| 3531 | { |
| 3532 | |
| 3533 | /* Prevent all adjustments to global symbols. */ |
| 3534 | if (S_IS_EXTERNAL (fixP->fx_addsy)) |
| 3535 | return 0; |
| 3536 | if (S_IS_WEAK (fixP->fx_addsy)) |
| 3537 | return 0; |
| 3538 | |
| 3539 | /* Adjust_reloc_syms doesn't know about the GOT. */ |
| 3540 | switch (fixP->fx_r_type) |
| 3541 | { |
| 3542 | case BFD_RELOC_ARC_GOTPC32: |
| 3543 | case BFD_RELOC_ARC_PLT32: |
| 3544 | case BFD_RELOC_ARC_S25H_PCREL_PLT: |
| 3545 | case BFD_RELOC_ARC_S21H_PCREL_PLT: |
| 3546 | case BFD_RELOC_ARC_S25W_PCREL_PLT: |
| 3547 | case BFD_RELOC_ARC_S21W_PCREL_PLT: |
| 3548 | return 0; |
| 3549 | |
| 3550 | default: |
| 3551 | break; |
| 3552 | } |
| 3553 | |
| 3554 | return 0; /* FIXME! return 1, fix it in the linker. */ |
| 3555 | } |
| 3556 | |
| 3557 | /* Compute the reloc type of an expression EXP. */ |
| 3558 | |
| 3559 | static void |
| 3560 | arc_check_reloc (expressionS *exp, |
| 3561 | bfd_reloc_code_real_type *r_type_p) |
| 3562 | { |
| 3563 | if (*r_type_p == BFD_RELOC_32 |
| 3564 | && exp->X_op == O_subtract |
| 3565 | && exp->X_op_symbol != NULL |
| 3566 | && exp->X_op_symbol->bsym->section == now_seg) |
| 3567 | *r_type_p = BFD_RELOC_ARC_32_PCREL; |
| 3568 | } |
| 3569 | |
| 3570 | |
| 3571 | /* Add expression EXP of SIZE bytes to offset OFF of fragment FRAG. */ |
| 3572 | |
| 3573 | void |
| 3574 | arc_cons_fix_new (fragS *frag, |
| 3575 | int off, |
| 3576 | int size, |
| 3577 | expressionS *exp, |
| 3578 | bfd_reloc_code_real_type r_type) |
| 3579 | { |
| 3580 | r_type = BFD_RELOC_UNUSED; |
| 3581 | |
| 3582 | switch (size) |
| 3583 | { |
| 3584 | case 1: |
| 3585 | r_type = BFD_RELOC_8; |
| 3586 | break; |
| 3587 | |
| 3588 | case 2: |
| 3589 | r_type = BFD_RELOC_16; |
| 3590 | break; |
| 3591 | |
| 3592 | case 3: |
| 3593 | r_type = BFD_RELOC_24; |
| 3594 | break; |
| 3595 | |
| 3596 | case 4: |
| 3597 | r_type = BFD_RELOC_32; |
| 3598 | arc_check_reloc (exp, &r_type); |
| 3599 | break; |
| 3600 | |
| 3601 | case 8: |
| 3602 | r_type = BFD_RELOC_64; |
| 3603 | break; |
| 3604 | |
| 3605 | default: |
| 3606 | as_bad (_("unsupported BFD relocation size %u"), size); |
| 3607 | r_type = BFD_RELOC_UNUSED; |
| 3608 | } |
| 3609 | |
| 3610 | fix_new_exp (frag, off, size, exp, 0, r_type); |
| 3611 | } |
| 3612 | |
| 3613 | /* The actual routine that checks the ZOL conditions. */ |
| 3614 | |
| 3615 | static void |
| 3616 | check_zol (symbolS *s) |
| 3617 | { |
| 3618 | switch (arc_mach_type) |
| 3619 | { |
| 3620 | case bfd_mach_arc_arcv2: |
| 3621 | if (arc_target & ARC_OPCODE_ARCv2EM) |
| 3622 | return; |
| 3623 | |
| 3624 | if (is_br_jmp_insn_p (arc_last_insns[0].opcode) |
| 3625 | || arc_last_insns[1].has_delay_slot) |
| 3626 | as_bad (_("Jump/Branch instruction detected at the end of the ZOL label @%s"), |
| 3627 | S_GET_NAME (s)); |
| 3628 | |
| 3629 | break; |
| 3630 | case bfd_mach_arc_arc600: |
| 3631 | |
| 3632 | if (is_kernel_insn_p (arc_last_insns[0].opcode)) |
| 3633 | as_bad (_("Kernel instruction detected at the end of the ZOL label @%s"), |
| 3634 | S_GET_NAME (s)); |
| 3635 | |
| 3636 | if (arc_last_insns[0].has_limm |
| 3637 | && is_br_jmp_insn_p (arc_last_insns[0].opcode)) |
| 3638 | as_bad (_("A jump instruction with long immediate detected at the \ |
| 3639 | end of the ZOL label @%s"), S_GET_NAME (s)); |
| 3640 | |
| 3641 | /* Fall through. */ |
| 3642 | case bfd_mach_arc_arc700: |
| 3643 | if (arc_last_insns[0].has_delay_slot) |
| 3644 | as_bad (_("An illegal use of delay slot detected at the end of the ZOL label @%s"), |
| 3645 | S_GET_NAME (s)); |
| 3646 | |
| 3647 | break; |
| 3648 | default: |
| 3649 | break; |
| 3650 | } |
| 3651 | } |
| 3652 | |
| 3653 | /* If ZOL end check the last two instruction for illegals. */ |
| 3654 | void |
| 3655 | arc_frob_label (symbolS * sym) |
| 3656 | { |
| 3657 | if (ARC_GET_FLAG (sym) & ARC_FLAG_ZOL) |
| 3658 | check_zol (sym); |
| 3659 | |
| 3660 | dwarf2_emit_label (sym); |
| 3661 | } |
| 3662 | |
| 3663 | /* Used because generic relaxation assumes a pc-rel value whilst we |
| 3664 | also relax instructions that use an absolute value resolved out of |
| 3665 | relative values (if that makes any sense). An example: 'add r1, |
| 3666 | r2, @.L2 - .' The symbols . and @.L2 are relative to the section |
| 3667 | but if they're in the same section we can subtract the section |
| 3668 | offset relocation which ends up in a resolved value. So if @.L2 is |
| 3669 | .text + 0x50 and . is .text + 0x10, we can say that .text + 0x50 - |
| 3670 | .text + 0x40 = 0x10. */ |
| 3671 | int |
| 3672 | arc_pcrel_adjust (fragS *fragP) |
| 3673 | { |
| 3674 | if (!fragP->tc_frag_data.pcrel) |
| 3675 | return fragP->fr_address + fragP->fr_fix; |
| 3676 | |
| 3677 | return 0; |
| 3678 | } |
| 3679 | |
| 3680 | /* Initialize the DWARF-2 unwind information for this procedure. */ |
| 3681 | |
| 3682 | void |
| 3683 | tc_arc_frame_initial_instructions (void) |
| 3684 | { |
| 3685 | /* Stack pointer is register 28. */ |
| 3686 | cfi_add_CFA_def_cfa_register (28); |
| 3687 | } |
| 3688 | |
| 3689 | int |
| 3690 | tc_arc_regname_to_dw2regnum (char *regname) |
| 3691 | { |
| 3692 | struct symbol *sym; |
| 3693 | |
| 3694 | sym = hash_find (arc_reg_hash, regname); |
| 3695 | if (sym) |
| 3696 | return S_GET_VALUE (sym); |
| 3697 | |
| 3698 | return -1; |
| 3699 | } |