| 1 | /* tc-msp430.c -- Assembler code for the Texas Instruments MSP430 |
| 2 | |
| 3 | Copyright (C) 2002-2015 Free Software Foundation, Inc. |
| 4 | Contributed by Dmitry Diky <diwil@mail.ru> |
| 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 |
| 20 | the Free Software Foundation, 51 Franklin Street - Fifth Floor, |
| 21 | Boston, MA 02110-1301, USA. */ |
| 22 | |
| 23 | #include "as.h" |
| 24 | #include <limits.h> |
| 25 | #define PUSH_1X_WORKAROUND |
| 26 | #include "subsegs.h" |
| 27 | #include "opcode/msp430.h" |
| 28 | #include "safe-ctype.h" |
| 29 | #include "dwarf2dbg.h" |
| 30 | #include "elf/msp430.h" |
| 31 | |
| 32 | /* We will disable polymorphs by default because it is dangerous. |
| 33 | The potential problem here is the following: assume we got the |
| 34 | following code: |
| 35 | |
| 36 | jump .l1 |
| 37 | nop |
| 38 | jump subroutine ; external symbol |
| 39 | .l1: |
| 40 | nop |
| 41 | ret |
| 42 | |
| 43 | In case of assembly time relaxation we'll get: |
| 44 | 0: jmp .l1 <.text +0x08> (reloc deleted) |
| 45 | 2: nop |
| 46 | 4: br subroutine |
| 47 | .l1: |
| 48 | 8: nop |
| 49 | 10: ret |
| 50 | |
| 51 | If the 'subroutine' is within +-1024 bytes range then linker |
| 52 | will produce: |
| 53 | 0: jmp .text +0x08 |
| 54 | 2: nop |
| 55 | 4: jmp subroutine |
| 56 | .l1: |
| 57 | 6: nop |
| 58 | 8: ret ; 'jmp .text +0x08' will land here. WRONG!!! |
| 59 | |
| 60 | The workaround is the following: |
| 61 | 1. Declare global var enable_polymorphs which set to 1 via option -mp. |
| 62 | 2. Declare global var enable_relax which set to 1 via option -mQ. |
| 63 | |
| 64 | If polymorphs are enabled, and relax isn't, treat all jumps as long jumps, |
| 65 | do not delete any relocs and leave them for linker. |
| 66 | |
| 67 | If relax is enabled, relax at assembly time and kill relocs as necessary. */ |
| 68 | |
| 69 | int msp430_enable_relax; |
| 70 | int msp430_enable_polys; |
| 71 | |
| 72 | /* Set linkrelax here to avoid fixups in most sections. */ |
| 73 | int linkrelax = 1; |
| 74 | |
| 75 | /* GCC uses the some condition codes which we'll |
| 76 | implement as new polymorph instructions. |
| 77 | |
| 78 | COND EXPL SHORT JUMP LONG JUMP |
| 79 | =============================================== |
| 80 | eq == jeq jne +4; br lab |
| 81 | ne != jne jeq +4; br lab |
| 82 | |
| 83 | ltn honours no-overflow flag |
| 84 | ltn < jn jn +2; jmp +4; br lab |
| 85 | |
| 86 | lt < jl jge +4; br lab |
| 87 | ltu < jlo lhs +4; br lab |
| 88 | le <= see below |
| 89 | leu <= see below |
| 90 | |
| 91 | gt > see below |
| 92 | gtu > see below |
| 93 | ge >= jge jl +4; br lab |
| 94 | geu >= jhs jlo +4; br lab |
| 95 | =============================================== |
| 96 | |
| 97 | Therefore, new opcodes are (BranchEQ -> beq; and so on...) |
| 98 | beq,bne,blt,bltn,bltu,bge,bgeu |
| 99 | 'u' means unsigned compares |
| 100 | |
| 101 | Also, we add 'jump' instruction: |
| 102 | jump UNCOND -> jmp br lab |
| 103 | |
| 104 | They will have fmt == 4, and insn_opnumb == number of instruction. */ |
| 105 | |
| 106 | struct rcodes_s |
| 107 | { |
| 108 | char * name; |
| 109 | int index; /* Corresponding insn_opnumb. */ |
| 110 | int sop; /* Opcode if jump length is short. */ |
| 111 | long lpos; /* Label position. */ |
| 112 | long lop0; /* Opcode 1 _word_ (16 bits). */ |
| 113 | long lop1; /* Opcode second word. */ |
| 114 | long lop2; /* Opcode third word. */ |
| 115 | }; |
| 116 | |
| 117 | #define MSP430_RLC(n,i,sop,o1) \ |
| 118 | {#n, i, sop, 2, (o1 + 2), 0x4010, 0} |
| 119 | |
| 120 | static struct rcodes_s msp430_rcodes[] = |
| 121 | { |
| 122 | MSP430_RLC (beq, 0, 0x2400, 0x2000), |
| 123 | MSP430_RLC (bne, 1, 0x2000, 0x2400), |
| 124 | MSP430_RLC (blt, 2, 0x3800, 0x3400), |
| 125 | MSP430_RLC (bltu, 3, 0x2800, 0x2c00), |
| 126 | MSP430_RLC (bge, 4, 0x3400, 0x3800), |
| 127 | MSP430_RLC (bgeu, 5, 0x2c00, 0x2800), |
| 128 | {"bltn", 6, 0x3000, 3, 0x3000 + 1, 0x3c00 + 2,0x4010}, |
| 129 | {"jump", 7, 0x3c00, 1, 0x4010, 0, 0}, |
| 130 | {0,0,0,0,0,0,0} |
| 131 | }; |
| 132 | |
| 133 | #undef MSP430_RLC |
| 134 | #define MSP430_RLC(n,i,sop,o1) \ |
| 135 | {#n, i, sop, 2, (o1 + 2), 0x0030, 0} |
| 136 | |
| 137 | static struct rcodes_s msp430x_rcodes[] = |
| 138 | { |
| 139 | MSP430_RLC (beq, 0, 0x2400, 0x2000), |
| 140 | MSP430_RLC (bne, 1, 0x2000, 0x2400), |
| 141 | MSP430_RLC (blt, 2, 0x3800, 0x3400), |
| 142 | MSP430_RLC (bltu, 3, 0x2800, 0x2c00), |
| 143 | MSP430_RLC (bge, 4, 0x3400, 0x3800), |
| 144 | MSP430_RLC (bgeu, 5, 0x2c00, 0x2800), |
| 145 | {"bltn", 6, 0x3000, 3, 0x0030 + 1, 0x3c00 + 2, 0x3000}, |
| 146 | {"jump", 7, 0x3c00, 1, 0x0030, 0, 0}, |
| 147 | {0,0,0,0,0,0,0} |
| 148 | }; |
| 149 | #undef MSP430_RLC |
| 150 | |
| 151 | /* More difficult than above and they have format 5. |
| 152 | |
| 153 | COND EXPL SHORT LONG |
| 154 | ================================================================= |
| 155 | gt > jeq +2; jge label jeq +6; jl +4; br label |
| 156 | gtu > jeq +2; jhs label jeq +6; jlo +4; br label |
| 157 | leu <= jeq label; jlo label jeq +2; jhs +4; br label |
| 158 | le <= jeq label; jl label jeq +2; jge +4; br label |
| 159 | ================================================================= */ |
| 160 | |
| 161 | struct hcodes_s |
| 162 | { |
| 163 | char * name; |
| 164 | int index; /* Corresponding insn_opnumb. */ |
| 165 | int tlab; /* Number of labels in short mode. */ |
| 166 | int op0; /* Opcode for first word of short jump. */ |
| 167 | int op1; /* Opcode for second word of short jump. */ |
| 168 | int lop0; /* Opcodes for long jump mode. */ |
| 169 | int lop1; |
| 170 | int lop2; |
| 171 | }; |
| 172 | |
| 173 | static struct hcodes_s msp430_hcodes[] = |
| 174 | { |
| 175 | {"bgt", 0, 1, 0x2401, 0x3400, 0x2403, 0x3802, 0x4010 }, |
| 176 | {"bgtu", 1, 1, 0x2401, 0x2c00, 0x2403, 0x2802, 0x4010 }, |
| 177 | {"bleu", 2, 2, 0x2400, 0x2800, 0x2401, 0x2c02, 0x4010 }, |
| 178 | {"ble", 3, 2, 0x2400, 0x3800, 0x2401, 0x3402, 0x4010 }, |
| 179 | {0,0,0,0,0,0,0,0} |
| 180 | }; |
| 181 | |
| 182 | static struct hcodes_s msp430x_hcodes[] = |
| 183 | { |
| 184 | {"bgt", 0, 1, 0x2401, 0x3400, 0x2403, 0x3802, 0x0030 }, |
| 185 | {"bgtu", 1, 1, 0x2401, 0x2c00, 0x2403, 0x2802, 0x0030 }, |
| 186 | {"bleu", 2, 2, 0x2400, 0x2800, 0x2401, 0x2c02, 0x0030 }, |
| 187 | {"ble", 3, 2, 0x2400, 0x3800, 0x2401, 0x3402, 0x0030 }, |
| 188 | {0,0,0,0,0,0,0,0} |
| 189 | }; |
| 190 | |
| 191 | const char comment_chars[] = ";"; |
| 192 | const char line_comment_chars[] = "#"; |
| 193 | const char line_separator_chars[] = "{"; |
| 194 | const char EXP_CHARS[] = "eE"; |
| 195 | const char FLT_CHARS[] = "dD"; |
| 196 | |
| 197 | /* Handle long expressions. */ |
| 198 | extern LITTLENUM_TYPE generic_bignum[]; |
| 199 | |
| 200 | static struct hash_control *msp430_hash; |
| 201 | |
| 202 | /* Relaxations. */ |
| 203 | #define STATE_UNCOND_BRANCH 1 /* jump */ |
| 204 | #define STATE_NOOV_BRANCH 3 /* bltn */ |
| 205 | #define STATE_SIMPLE_BRANCH 2 /* bne, beq, etc... */ |
| 206 | #define STATE_EMUL_BRANCH 4 |
| 207 | |
| 208 | #define CNRL 2 |
| 209 | #define CUBL 4 |
| 210 | #define CNOL 8 |
| 211 | #define CSBL 6 |
| 212 | #define CEBL 4 |
| 213 | |
| 214 | /* Length. */ |
| 215 | #define STATE_BITS10 1 /* wild guess. short jump */ |
| 216 | #define STATE_WORD 2 /* 2 bytes pc rel. addr. more */ |
| 217 | #define STATE_UNDEF 3 /* cannot handle this yet. convert to word mode */ |
| 218 | |
| 219 | #define ENCODE_RELAX(what,length) (((what) << 2) + (length)) |
| 220 | #define RELAX_STATE(s) ((s) & 3) |
| 221 | #define RELAX_LEN(s) ((s) >> 2) |
| 222 | #define RELAX_NEXT(a,b) ENCODE_RELAX (a, b + 1) |
| 223 | |
| 224 | relax_typeS md_relax_table[] = |
| 225 | { |
| 226 | /* Unused. */ |
| 227 | {1, 1, 0, 0}, |
| 228 | {1, 1, 0, 0}, |
| 229 | {1, 1, 0, 0}, |
| 230 | {1, 1, 0, 0}, |
| 231 | |
| 232 | /* Unconditional jump. */ |
| 233 | {1, 1, 8, 5}, |
| 234 | {1024, -1024, CNRL, RELAX_NEXT (STATE_UNCOND_BRANCH, STATE_BITS10)}, /* state 10 bits displ */ |
| 235 | {0, 0, CUBL, RELAX_NEXT (STATE_UNCOND_BRANCH, STATE_WORD)}, /* state word */ |
| 236 | {1, 1, CUBL, 0}, /* state undef */ |
| 237 | |
| 238 | /* Simple branches. */ |
| 239 | {0, 0, 8, 9}, |
| 240 | {1024, -1024, CNRL, RELAX_NEXT (STATE_SIMPLE_BRANCH, STATE_BITS10)}, /* state 10 bits displ */ |
| 241 | {0, 0, CSBL, RELAX_NEXT (STATE_SIMPLE_BRANCH, STATE_WORD)}, /* state word */ |
| 242 | {1, 1, CSBL, 0}, |
| 243 | |
| 244 | /* blt no overflow branch. */ |
| 245 | {1, 1, 8, 13}, |
| 246 | {1024, -1024, CNRL, RELAX_NEXT (STATE_NOOV_BRANCH, STATE_BITS10)}, /* state 10 bits displ */ |
| 247 | {0, 0, CNOL, RELAX_NEXT (STATE_NOOV_BRANCH, STATE_WORD)}, /* state word */ |
| 248 | {1, 1, CNOL, 0}, |
| 249 | |
| 250 | /* Emulated branches. */ |
| 251 | {1, 1, 8, 17}, |
| 252 | {1020, -1020, CEBL, RELAX_NEXT (STATE_EMUL_BRANCH, STATE_BITS10)}, /* state 10 bits displ */ |
| 253 | {0, 0, CNOL, RELAX_NEXT (STATE_EMUL_BRANCH, STATE_WORD)}, /* state word */ |
| 254 | {1, 1, CNOL, 0} |
| 255 | }; |
| 256 | |
| 257 | |
| 258 | #define MAX_OP_LEN 256 |
| 259 | |
| 260 | typedef enum msp_isa |
| 261 | { |
| 262 | MSP_ISA_430, |
| 263 | MSP_ISA_430X, |
| 264 | MSP_ISA_430Xv2 |
| 265 | } msp_isa; |
| 266 | |
| 267 | static enum msp_isa selected_isa = MSP_ISA_430Xv2; |
| 268 | |
| 269 | static inline bfd_boolean |
| 270 | target_is_430x (void) |
| 271 | { |
| 272 | return selected_isa >= MSP_ISA_430X; |
| 273 | } |
| 274 | |
| 275 | static inline bfd_boolean |
| 276 | target_is_430xv2 (void) |
| 277 | { |
| 278 | return selected_isa == MSP_ISA_430Xv2; |
| 279 | } |
| 280 | |
| 281 | /* Generate an absolute 16-bit relocation. |
| 282 | For the 430X we generate a relocation without linker range checking |
| 283 | if the value is being used in an extended (ie 20-bit) instruction, |
| 284 | otherwise if have a shifted expression we use a HI reloc. |
| 285 | For the 430 we generate a relocation without assembler range checking |
| 286 | if we are handling an immediate value or a byte-width instruction. */ |
| 287 | |
| 288 | #undef CHECK_RELOC_MSP430 |
| 289 | #define CHECK_RELOC_MSP430(OP) \ |
| 290 | (target_is_430x () \ |
| 291 | ? (extended_op \ |
| 292 | ? BFD_RELOC_16 \ |
| 293 | : ((OP).vshift == 1) \ |
| 294 | ? BFD_RELOC_MSP430_ABS_HI16 \ |
| 295 | : BFD_RELOC_MSP430X_ABS16) \ |
| 296 | : ((imm_op || byte_op) \ |
| 297 | ? BFD_RELOC_MSP430_16_BYTE : BFD_RELOC_MSP430_16)) |
| 298 | |
| 299 | /* Generate a 16-bit pc-relative relocation. |
| 300 | For the 430X we generate a relocation without linkwer range checking. |
| 301 | For the 430 we generate a relocation without assembler range checking |
| 302 | if we are handling an immediate value or a byte-width instruction. */ |
| 303 | #undef CHECK_RELOC_MSP430_PCREL |
| 304 | #define CHECK_RELOC_MSP430_PCREL \ |
| 305 | (target_is_430x () \ |
| 306 | ? BFD_RELOC_MSP430X_PCR16 \ |
| 307 | : (imm_op || byte_op) \ |
| 308 | ? BFD_RELOC_MSP430_16_PCREL_BYTE : BFD_RELOC_MSP430_16_PCREL) |
| 309 | |
| 310 | /* Profiling capability: |
| 311 | It is a performance hit to use gcc's profiling approach for this tiny target. |
| 312 | Even more -- jtag hardware facility does not perform any profiling functions. |
| 313 | However we've got gdb's built-in simulator where we can do anything. |
| 314 | Therefore my suggestion is: |
| 315 | |
| 316 | We define new section ".profiler" which holds all profiling information. |
| 317 | We define new pseudo operation .profiler which will instruct assembler to |
| 318 | add new profile entry to the object file. Profile should take place at the |
| 319 | present address. |
| 320 | |
| 321 | Pseudo-op format: |
| 322 | |
| 323 | .profiler flags,function_to_profile [, cycle_corrector, extra] |
| 324 | |
| 325 | where 'flags' is a combination of the following chars: |
| 326 | s - function Start |
| 327 | x - function eXit |
| 328 | i - function is in Init section |
| 329 | f - function is in Fini section |
| 330 | l - Library call |
| 331 | c - libC standard call |
| 332 | d - stack value Demand (saved at run-time in simulator) |
| 333 | I - Interrupt service routine |
| 334 | P - Prologue start |
| 335 | p - Prologue end |
| 336 | E - Epilogue start |
| 337 | e - Epilogue end |
| 338 | j - long Jump/ sjlj unwind |
| 339 | a - an Arbitrary code fragment |
| 340 | t - exTra parameter saved (constant value like frame size) |
| 341 | '""' optional: "sil" == sil |
| 342 | |
| 343 | function_to_profile - function's address |
| 344 | cycle_corrector - a value which should be added to the cycle |
| 345 | counter, zero if omitted |
| 346 | extra - some extra parameter, zero if omitted. |
| 347 | |
| 348 | For example: |
| 349 | ------------------------------ |
| 350 | .global fxx |
| 351 | .type fxx,@function |
| 352 | fxx: |
| 353 | .LFrameOffset_fxx=0x08 |
| 354 | .profiler "scdP", fxx ; function entry. |
| 355 | ; we also demand stack value to be displayed |
| 356 | push r11 |
| 357 | push r10 |
| 358 | push r9 |
| 359 | push r8 |
| 360 | .profiler "cdp",fxx,0, .LFrameOffset_fxx ; check stack value at this point |
| 361 | ; (this is a prologue end) |
| 362 | ; note, that spare var filled with the frame size |
| 363 | mov r15,r8 |
| 364 | .... |
| 365 | .profiler cdE,fxx ; check stack |
| 366 | pop r8 |
| 367 | pop r9 |
| 368 | pop r10 |
| 369 | pop r11 |
| 370 | .profiler xcde,fxx,3 ; exit adds 3 to the cycle counter |
| 371 | ret ; cause 'ret' insn takes 3 cycles |
| 372 | ------------------------------- |
| 373 | |
| 374 | This profiling approach does not produce any overhead and |
| 375 | absolutely harmless. |
| 376 | So, even profiled code can be uploaded to the MCU. */ |
| 377 | #define MSP430_PROFILER_FLAG_ENTRY 1 /* s */ |
| 378 | #define MSP430_PROFILER_FLAG_EXIT 2 /* x */ |
| 379 | #define MSP430_PROFILER_FLAG_INITSECT 4 /* i */ |
| 380 | #define MSP430_PROFILER_FLAG_FINISECT 8 /* f */ |
| 381 | #define MSP430_PROFILER_FLAG_LIBCALL 0x10 /* l */ |
| 382 | #define MSP430_PROFILER_FLAG_STDCALL 0x20 /* c */ |
| 383 | #define MSP430_PROFILER_FLAG_STACKDMD 0x40 /* d */ |
| 384 | #define MSP430_PROFILER_FLAG_ISR 0x80 /* I */ |
| 385 | #define MSP430_PROFILER_FLAG_PROLSTART 0x100 /* P */ |
| 386 | #define MSP430_PROFILER_FLAG_PROLEND 0x200 /* p */ |
| 387 | #define MSP430_PROFILER_FLAG_EPISTART 0x400 /* E */ |
| 388 | #define MSP430_PROFILER_FLAG_EPIEND 0x800 /* e */ |
| 389 | #define MSP430_PROFILER_FLAG_JUMP 0x1000 /* j */ |
| 390 | #define MSP430_PROFILER_FLAG_FRAGMENT 0x2000 /* a */ |
| 391 | #define MSP430_PROFILER_FLAG_EXTRA 0x4000 /* t */ |
| 392 | #define MSP430_PROFILER_FLAG_notyet 0x8000 /* ? */ |
| 393 | |
| 394 | static int |
| 395 | pow2value (int y) |
| 396 | { |
| 397 | int n = 0; |
| 398 | unsigned int x; |
| 399 | |
| 400 | x = y; |
| 401 | |
| 402 | if (!x) |
| 403 | return 1; |
| 404 | |
| 405 | for (; x; x = x >> 1) |
| 406 | if (x & 1) |
| 407 | n++; |
| 408 | |
| 409 | return n == 1; |
| 410 | } |
| 411 | |
| 412 | /* Parse ordinary expression. */ |
| 413 | |
| 414 | static char * |
| 415 | parse_exp (char * s, expressionS * op) |
| 416 | { |
| 417 | input_line_pointer = s; |
| 418 | expression (op); |
| 419 | if (op->X_op == O_absent) |
| 420 | as_bad (_("missing operand")); |
| 421 | return input_line_pointer; |
| 422 | } |
| 423 | |
| 424 | |
| 425 | /* Delete spaces from s: X ( r 1 2) => X(r12). */ |
| 426 | |
| 427 | static void |
| 428 | del_spaces (char * s) |
| 429 | { |
| 430 | while (*s) |
| 431 | { |
| 432 | if (ISSPACE (*s)) |
| 433 | { |
| 434 | char *m = s + 1; |
| 435 | |
| 436 | while (ISSPACE (*m) && *m) |
| 437 | m++; |
| 438 | memmove (s, m, strlen (m) + 1); |
| 439 | } |
| 440 | else |
| 441 | s++; |
| 442 | } |
| 443 | } |
| 444 | |
| 445 | static inline char * |
| 446 | skip_space (char * s) |
| 447 | { |
| 448 | while (ISSPACE (*s)) |
| 449 | ++s; |
| 450 | return s; |
| 451 | } |
| 452 | |
| 453 | /* Extract one word from FROM and copy it to TO. Delimiters are ",;\n" */ |
| 454 | |
| 455 | static char * |
| 456 | extract_operand (char * from, char * to, int limit) |
| 457 | { |
| 458 | int size = 0; |
| 459 | |
| 460 | /* Drop leading whitespace. */ |
| 461 | from = skip_space (from); |
| 462 | |
| 463 | while (size < limit && *from) |
| 464 | { |
| 465 | *(to + size) = *from; |
| 466 | if (*from == ',' || *from == ';' || *from == '\n') |
| 467 | break; |
| 468 | from++; |
| 469 | size++; |
| 470 | } |
| 471 | |
| 472 | *(to + size) = 0; |
| 473 | del_spaces (to); |
| 474 | |
| 475 | from++; |
| 476 | |
| 477 | return from; |
| 478 | } |
| 479 | |
| 480 | static void |
| 481 | msp430_profiler (int dummy ATTRIBUTE_UNUSED) |
| 482 | { |
| 483 | char buffer[1024]; |
| 484 | char f[32]; |
| 485 | char * str = buffer; |
| 486 | char * flags = f; |
| 487 | int p_flags = 0; |
| 488 | char * halt; |
| 489 | int ops = 0; |
| 490 | int left; |
| 491 | char * s; |
| 492 | segT seg; |
| 493 | int subseg; |
| 494 | char * end = 0; |
| 495 | expressionS exp; |
| 496 | expressionS exp1; |
| 497 | |
| 498 | s = input_line_pointer; |
| 499 | end = input_line_pointer; |
| 500 | |
| 501 | while (*end && *end != '\n') |
| 502 | end++; |
| 503 | |
| 504 | while (*s && *s != '\n') |
| 505 | { |
| 506 | if (*s == ',') |
| 507 | ops++; |
| 508 | s++; |
| 509 | } |
| 510 | |
| 511 | left = 3 - ops; |
| 512 | |
| 513 | if (ops < 1) |
| 514 | { |
| 515 | as_bad (_(".profiler pseudo requires at least two operands.")); |
| 516 | input_line_pointer = end; |
| 517 | return; |
| 518 | } |
| 519 | |
| 520 | input_line_pointer = extract_operand (input_line_pointer, flags, 32); |
| 521 | |
| 522 | while (*flags) |
| 523 | { |
| 524 | switch (*flags) |
| 525 | { |
| 526 | case '"': |
| 527 | break; |
| 528 | case 'a': |
| 529 | p_flags |= MSP430_PROFILER_FLAG_FRAGMENT; |
| 530 | break; |
| 531 | case 'j': |
| 532 | p_flags |= MSP430_PROFILER_FLAG_JUMP; |
| 533 | break; |
| 534 | case 'P': |
| 535 | p_flags |= MSP430_PROFILER_FLAG_PROLSTART; |
| 536 | break; |
| 537 | case 'p': |
| 538 | p_flags |= MSP430_PROFILER_FLAG_PROLEND; |
| 539 | break; |
| 540 | case 'E': |
| 541 | p_flags |= MSP430_PROFILER_FLAG_EPISTART; |
| 542 | break; |
| 543 | case 'e': |
| 544 | p_flags |= MSP430_PROFILER_FLAG_EPIEND; |
| 545 | break; |
| 546 | case 's': |
| 547 | p_flags |= MSP430_PROFILER_FLAG_ENTRY; |
| 548 | break; |
| 549 | case 'x': |
| 550 | p_flags |= MSP430_PROFILER_FLAG_EXIT; |
| 551 | break; |
| 552 | case 'i': |
| 553 | p_flags |= MSP430_PROFILER_FLAG_INITSECT; |
| 554 | break; |
| 555 | case 'f': |
| 556 | p_flags |= MSP430_PROFILER_FLAG_FINISECT; |
| 557 | break; |
| 558 | case 'l': |
| 559 | p_flags |= MSP430_PROFILER_FLAG_LIBCALL; |
| 560 | break; |
| 561 | case 'c': |
| 562 | p_flags |= MSP430_PROFILER_FLAG_STDCALL; |
| 563 | break; |
| 564 | case 'd': |
| 565 | p_flags |= MSP430_PROFILER_FLAG_STACKDMD; |
| 566 | break; |
| 567 | case 'I': |
| 568 | p_flags |= MSP430_PROFILER_FLAG_ISR; |
| 569 | break; |
| 570 | case 't': |
| 571 | p_flags |= MSP430_PROFILER_FLAG_EXTRA; |
| 572 | break; |
| 573 | default: |
| 574 | as_warn (_("unknown profiling flag - ignored.")); |
| 575 | break; |
| 576 | } |
| 577 | flags++; |
| 578 | } |
| 579 | |
| 580 | if (p_flags |
| 581 | && ( ! pow2value (p_flags & ( MSP430_PROFILER_FLAG_ENTRY |
| 582 | | MSP430_PROFILER_FLAG_EXIT)) |
| 583 | || ! pow2value (p_flags & ( MSP430_PROFILER_FLAG_PROLSTART |
| 584 | | MSP430_PROFILER_FLAG_PROLEND |
| 585 | | MSP430_PROFILER_FLAG_EPISTART |
| 586 | | MSP430_PROFILER_FLAG_EPIEND)) |
| 587 | || ! pow2value (p_flags & ( MSP430_PROFILER_FLAG_INITSECT |
| 588 | | MSP430_PROFILER_FLAG_FINISECT)))) |
| 589 | { |
| 590 | as_bad (_("ambiguous flags combination - '.profiler' directive ignored.")); |
| 591 | input_line_pointer = end; |
| 592 | return; |
| 593 | } |
| 594 | |
| 595 | /* Generate temp symbol which denotes current location. */ |
| 596 | if (now_seg == absolute_section) /* Paranoia ? */ |
| 597 | { |
| 598 | exp1.X_op = O_constant; |
| 599 | exp1.X_add_number = abs_section_offset; |
| 600 | as_warn (_("profiling in absolute section?")); |
| 601 | } |
| 602 | else |
| 603 | { |
| 604 | exp1.X_op = O_symbol; |
| 605 | exp1.X_add_symbol = symbol_temp_new_now (); |
| 606 | exp1.X_add_number = 0; |
| 607 | } |
| 608 | |
| 609 | /* Generate a symbol which holds flags value. */ |
| 610 | exp.X_op = O_constant; |
| 611 | exp.X_add_number = p_flags; |
| 612 | |
| 613 | /* Save current section. */ |
| 614 | seg = now_seg; |
| 615 | subseg = now_subseg; |
| 616 | |
| 617 | /* Now go to .profiler section. */ |
| 618 | obj_elf_change_section (".profiler", SHT_PROGBITS, 0, 0, 0, 0, 0); |
| 619 | |
| 620 | /* Save flags. */ |
| 621 | emit_expr (& exp, 2); |
| 622 | |
| 623 | /* Save label value. */ |
| 624 | emit_expr (& exp1, 2); |
| 625 | |
| 626 | while (ops--) |
| 627 | { |
| 628 | /* Now get profiling info. */ |
| 629 | halt = extract_operand (input_line_pointer, str, 1024); |
| 630 | /* Process like ".word xxx" directive. */ |
| 631 | parse_exp (str, & exp); |
| 632 | emit_expr (& exp, 2); |
| 633 | input_line_pointer = halt; |
| 634 | } |
| 635 | |
| 636 | /* Fill the rest with zeros. */ |
| 637 | exp.X_op = O_constant; |
| 638 | exp.X_add_number = 0; |
| 639 | while (left--) |
| 640 | emit_expr (& exp, 2); |
| 641 | |
| 642 | /* Return to current section. */ |
| 643 | subseg_set (seg, subseg); |
| 644 | } |
| 645 | |
| 646 | static char * |
| 647 | extract_word (char * from, char * to, int limit) |
| 648 | { |
| 649 | char *op_end; |
| 650 | int size = 0; |
| 651 | |
| 652 | /* Drop leading whitespace. */ |
| 653 | from = skip_space (from); |
| 654 | *to = 0; |
| 655 | |
| 656 | /* Find the op code end. */ |
| 657 | for (op_end = from; *op_end != 0 && is_part_of_name (*op_end);) |
| 658 | { |
| 659 | to[size++] = *op_end++; |
| 660 | if (size + 1 >= limit) |
| 661 | break; |
| 662 | } |
| 663 | |
| 664 | to[size] = 0; |
| 665 | return op_end; |
| 666 | } |
| 667 | |
| 668 | #define OPTION_MMCU 'm' |
| 669 | #define OPTION_RELAX 'Q' |
| 670 | #define OPTION_POLYMORPHS 'P' |
| 671 | #define OPTION_LARGE 'l' |
| 672 | static bfd_boolean large_model = FALSE; |
| 673 | #define OPTION_NO_INTR_NOPS 'N' |
| 674 | #define OPTION_INTR_NOPS 'n' |
| 675 | static bfd_boolean gen_interrupt_nops = FALSE; |
| 676 | #define OPTION_WARN_INTR_NOPS 'y' |
| 677 | #define OPTION_NO_WARN_INTR_NOPS 'Y' |
| 678 | static bfd_boolean warn_interrupt_nops = TRUE; |
| 679 | #define OPTION_MCPU 'c' |
| 680 | #define OPTION_MOVE_DATA 'd' |
| 681 | static bfd_boolean move_data = FALSE; |
| 682 | |
| 683 | static void |
| 684 | msp430_set_arch (int option) |
| 685 | { |
| 686 | char *str = (char *) alloca (32); /* 32 for good measure. */ |
| 687 | |
| 688 | input_line_pointer = extract_word (input_line_pointer, str, 32); |
| 689 | |
| 690 | md_parse_option (option, str); |
| 691 | bfd_set_arch_mach (stdoutput, TARGET_ARCH, |
| 692 | target_is_430x () ? bfd_mach_msp430x : bfd_mach_msp11); |
| 693 | } |
| 694 | |
| 695 | /* This is the full list of MCU names that are known to only |
| 696 | support the 430 ISA. */ |
| 697 | static const char * msp430_mcu_names [] = |
| 698 | { |
| 699 | "msp430afe221", "msp430afe222", "msp430afe223", "msp430afe231", |
| 700 | "msp430afe232", "msp430afe233", "msp430afe251", "msp430afe252", |
| 701 | "msp430afe253", "msp430c091", "msp430c092", "msp430c111", |
| 702 | "msp430c1111", "msp430c112", "msp430c1121", "msp430c1331", |
| 703 | "msp430c1351", "msp430c311s", "msp430c312", "msp430c313", |
| 704 | "msp430c314", "msp430c315", "msp430c323", "msp430c325", |
| 705 | "msp430c336", "msp430c337", "msp430c412", "msp430c413", |
| 706 | "msp430e112", "msp430e313", "msp430e315", "msp430e325", |
| 707 | "msp430e337", "msp430f110", "msp430f1101", "msp430f1101a", |
| 708 | "msp430f1111", "msp430f1111a", "msp430f112", "msp430f1121", |
| 709 | "msp430f1121a", "msp430f1122", "msp430f1132", "msp430f122", |
| 710 | "msp430f1222", "msp430f123", "msp430f1232", "msp430f133", |
| 711 | "msp430f135", "msp430f147", "msp430f1471", "msp430f148", |
| 712 | "msp430f1481", "msp430f149", "msp430f1491", "msp430f155", |
| 713 | "msp430f156", "msp430f157", "msp430f1610", "msp430f1611", |
| 714 | "msp430f1612", "msp430f167", "msp430f168", "msp430f169", |
| 715 | "msp430f2001", "msp430f2002", "msp430f2003", "msp430f2011", |
| 716 | "msp430f2012", "msp430f2013", "msp430f2101", "msp430f2111", |
| 717 | "msp430f2112", "msp430f2121", "msp430f2122", "msp430f2131", |
| 718 | "msp430f2132", "msp430f2232", "msp430f2234", "msp430f2252", |
| 719 | "msp430f2254", "msp430f2272", "msp430f2274", "msp430f233", |
| 720 | "msp430f2330", "msp430f235", "msp430f2350", "msp430f2370", |
| 721 | "msp430f2410", "msp430f247", "msp430f2471", "msp430f248", |
| 722 | "msp430f2481", "msp430f249", "msp430f2491", "msp430f412", |
| 723 | "msp430f413", "msp430f4132", "msp430f415", "msp430f4152", |
| 724 | "msp430f417", "msp430f423", "msp430f423a", "msp430f425", |
| 725 | "msp430f4250", "msp430f425a", "msp430f4260", "msp430f427", |
| 726 | "msp430f4270", "msp430f427a", "msp430f435", "msp430f4351", |
| 727 | "msp430f436", "msp430f4361", "msp430f437", "msp430f4371", |
| 728 | "msp430f438", "msp430f439", "msp430f447", "msp430f448", |
| 729 | "msp430f4481", "msp430f449", "msp430f4491", "msp430f477", |
| 730 | "msp430f478", "msp430f4783", "msp430f4784", "msp430f479", |
| 731 | "msp430f4793", "msp430f4794", "msp430fe423", "msp430fe4232", |
| 732 | "msp430fe423a", "msp430fe4242", "msp430fe425", "msp430fe4252", |
| 733 | "msp430fe425a", "msp430fe427", "msp430fe4272", "msp430fe427a", |
| 734 | "msp430fg4250", "msp430fg4260", "msp430fg4270", "msp430fg437", |
| 735 | "msp430fg438", "msp430fg439", "msp430fg477", "msp430fg478", |
| 736 | "msp430fg479", "msp430fw423", "msp430fw425", "msp430fw427", |
| 737 | "msp430fw428", "msp430fw429", "msp430g2001", "msp430g2101", |
| 738 | "msp430g2102", "msp430g2111", "msp430g2112", "msp430g2113", |
| 739 | "msp430g2121", "msp430g2131", "msp430g2132", "msp430g2152", |
| 740 | "msp430g2153", "msp430g2201", "msp430g2202", "msp430g2203", |
| 741 | "msp430g2210", "msp430g2211", "msp430g2212", "msp430g2213", |
| 742 | "msp430g2221", "msp430g2230", "msp430g2231", "msp430g2232", |
| 743 | "msp430g2233", "msp430g2252", "msp430g2253", "msp430g2302", |
| 744 | "msp430g2303", "msp430g2312", "msp430g2313", "msp430g2332", |
| 745 | "msp430g2333", "msp430g2352", "msp430g2353", "msp430g2402", |
| 746 | "msp430g2403", "msp430g2412", "msp430g2413", "msp430g2432", |
| 747 | "msp430g2433", "msp430g2444", "msp430g2452", "msp430g2453", |
| 748 | "msp430g2513", "msp430g2533", "msp430g2544", "msp430g2553", |
| 749 | "msp430g2744", "msp430g2755", "msp430g2855", "msp430g2955", |
| 750 | "msp430i2020", "msp430i2021", "msp430i2030", "msp430i2031", |
| 751 | "msp430i2040", "msp430i2041", "msp430l092", "msp430p112", |
| 752 | "msp430p313", "msp430p315", "msp430p315s", "msp430p325", |
| 753 | "msp430p337", "msp430tch5e" |
| 754 | }; |
| 755 | |
| 756 | int |
| 757 | md_parse_option (int c, char * arg) |
| 758 | { |
| 759 | switch (c) |
| 760 | { |
| 761 | case OPTION_MMCU: |
| 762 | if (arg == NULL) |
| 763 | as_fatal (_("MCU option requires a name\n")); |
| 764 | |
| 765 | if (strcasecmp ("msp430", arg) == 0) |
| 766 | selected_isa = MSP_ISA_430; |
| 767 | else if (strcasecmp ("msp430xv2", arg) == 0) |
| 768 | selected_isa = MSP_ISA_430Xv2; |
| 769 | else if (strcasecmp ("msp430x", arg) == 0) |
| 770 | selected_isa = MSP_ISA_430X; |
| 771 | else |
| 772 | { |
| 773 | int i; |
| 774 | |
| 775 | for (i = sizeof msp430_mcu_names / sizeof msp430_mcu_names[0]; i--;) |
| 776 | if (strcasecmp (msp430_mcu_names[i], arg) == 0) |
| 777 | { |
| 778 | selected_isa = MSP_ISA_430; |
| 779 | break; |
| 780 | } |
| 781 | } |
| 782 | /* It is not an error if we do not match the MCU name. */ |
| 783 | return 1; |
| 784 | |
| 785 | case OPTION_MCPU: |
| 786 | if (strcmp (arg, "430") == 0 |
| 787 | || strcasecmp (arg, "msp430") == 0) |
| 788 | selected_isa = MSP_ISA_430; |
| 789 | else if (strcasecmp (arg, "430x") == 0 |
| 790 | || strcasecmp (arg, "msp430x") == 0) |
| 791 | selected_isa = MSP_ISA_430X; |
| 792 | else if (strcasecmp (arg, "430xv2") == 0 |
| 793 | || strcasecmp (arg, "msp430xv2") == 0) |
| 794 | selected_isa = MSP_ISA_430Xv2; |
| 795 | else |
| 796 | as_fatal (_("unrecognised argument to -mcpu option '%s'"), arg); |
| 797 | return 1; |
| 798 | |
| 799 | case OPTION_RELAX: |
| 800 | msp430_enable_relax = 1; |
| 801 | return 1; |
| 802 | |
| 803 | case OPTION_POLYMORPHS: |
| 804 | msp430_enable_polys = 1; |
| 805 | return 1; |
| 806 | |
| 807 | case OPTION_LARGE: |
| 808 | large_model = TRUE; |
| 809 | return 1; |
| 810 | |
| 811 | case OPTION_NO_INTR_NOPS: |
| 812 | gen_interrupt_nops = FALSE; |
| 813 | return 1; |
| 814 | case OPTION_INTR_NOPS: |
| 815 | gen_interrupt_nops = TRUE; |
| 816 | return 1; |
| 817 | |
| 818 | case OPTION_WARN_INTR_NOPS: |
| 819 | warn_interrupt_nops = TRUE; |
| 820 | return 1; |
| 821 | case OPTION_NO_WARN_INTR_NOPS: |
| 822 | warn_interrupt_nops = FALSE; |
| 823 | return 1; |
| 824 | |
| 825 | case OPTION_MOVE_DATA: |
| 826 | move_data = TRUE; |
| 827 | return 1; |
| 828 | } |
| 829 | |
| 830 | return 0; |
| 831 | } |
| 832 | |
| 833 | /* The intention here is to have the mere presence of these sections |
| 834 | cause the object to have a reference to a well-known symbol. This |
| 835 | reference pulls in the bits of the runtime (crt0) that initialize |
| 836 | these sections. Thus, for example, the startup code to call |
| 837 | memset() to initialize .bss will only be linked in when there is a |
| 838 | non-empty .bss section. Otherwise, the call would exist but have a |
| 839 | zero length parameter, which is a waste of memory and cycles. |
| 840 | |
| 841 | The code which initializes these sections should have a global |
| 842 | label for these symbols, and should be marked with KEEP() in the |
| 843 | linker script. |
| 844 | */ |
| 845 | static void |
| 846 | msp430_section (int arg) |
| 847 | { |
| 848 | char * saved_ilp = input_line_pointer; |
| 849 | char * name = obj_elf_section_name (); |
| 850 | |
| 851 | if (strncmp (name, ".bss", 4) == 0 |
| 852 | || strncmp (name, ".gnu.linkonce.b.", 16) == 0) |
| 853 | (void) symbol_find_or_make ("__crt0_init_bss"); |
| 854 | |
| 855 | if (strncmp (name, ".data", 5) == 0 |
| 856 | || strncmp (name, ".gnu.linkonce.d.", 16) == 0) |
| 857 | (void) symbol_find_or_make ("__crt0_movedata"); |
| 858 | |
| 859 | input_line_pointer = saved_ilp; |
| 860 | obj_elf_section (arg); |
| 861 | } |
| 862 | |
| 863 | void |
| 864 | msp430_frob_section (asection *sec) |
| 865 | { |
| 866 | const char *name = sec->name; |
| 867 | |
| 868 | if (sec->size == 0) |
| 869 | return; |
| 870 | |
| 871 | if (strncmp (name, ".bss", 4) == 0 |
| 872 | || strncmp (name, ".gnu.linkonce.b.", 16) == 0) |
| 873 | (void) symbol_find_or_make ("__crt0_init_bss"); |
| 874 | |
| 875 | if (strncmp (name, ".data", 5) == 0 |
| 876 | || strncmp (name, ".gnu.linkonce.d.", 16) == 0) |
| 877 | (void) symbol_find_or_make ("__crt0_movedata"); |
| 878 | } |
| 879 | |
| 880 | static void |
| 881 | msp430_lcomm (int ignore ATTRIBUTE_UNUSED) |
| 882 | { |
| 883 | symbolS *symbolP = s_comm_internal (0, s_lcomm_internal); |
| 884 | |
| 885 | if (symbolP) |
| 886 | symbol_get_bfdsym (symbolP)->flags |= BSF_OBJECT; |
| 887 | (void) symbol_find_or_make ("__crt0_init_bss"); |
| 888 | } |
| 889 | |
| 890 | static void |
| 891 | msp430_comm (int needs_align) |
| 892 | { |
| 893 | s_comm_internal (needs_align, elf_common_parse); |
| 894 | (void) symbol_find_or_make ("__crt0_init_bss"); |
| 895 | } |
| 896 | |
| 897 | static void |
| 898 | msp430_refsym (int arg ATTRIBUTE_UNUSED) |
| 899 | { |
| 900 | char sym_name[1024]; |
| 901 | input_line_pointer = extract_word (input_line_pointer, sym_name, 1024); |
| 902 | |
| 903 | (void) symbol_find_or_make (sym_name); |
| 904 | } |
| 905 | |
| 906 | const pseudo_typeS md_pseudo_table[] = |
| 907 | { |
| 908 | {"arch", msp430_set_arch, OPTION_MMCU}, |
| 909 | {"cpu", msp430_set_arch, OPTION_MCPU}, |
| 910 | {"profiler", msp430_profiler, 0}, |
| 911 | {"section", msp430_section, 0}, |
| 912 | {"section.s", msp430_section, 0}, |
| 913 | {"sect", msp430_section, 0}, |
| 914 | {"sect.s", msp430_section, 0}, |
| 915 | {"pushsection", msp430_section, 1}, |
| 916 | {"refsym", msp430_refsym, 0}, |
| 917 | {"comm", msp430_comm, 0}, |
| 918 | {"lcomm", msp430_lcomm, 0}, |
| 919 | {NULL, NULL, 0} |
| 920 | }; |
| 921 | |
| 922 | const char *md_shortopts = "mm:,mP,mQ,ml,mN,mn,my,mY"; |
| 923 | |
| 924 | struct option md_longopts[] = |
| 925 | { |
| 926 | {"mmcu", required_argument, NULL, OPTION_MMCU}, |
| 927 | {"mcpu", required_argument, NULL, OPTION_MCPU}, |
| 928 | {"mP", no_argument, NULL, OPTION_POLYMORPHS}, |
| 929 | {"mQ", no_argument, NULL, OPTION_RELAX}, |
| 930 | {"ml", no_argument, NULL, OPTION_LARGE}, |
| 931 | {"mN", no_argument, NULL, OPTION_NO_INTR_NOPS}, |
| 932 | {"mn", no_argument, NULL, OPTION_INTR_NOPS}, |
| 933 | {"mY", no_argument, NULL, OPTION_NO_WARN_INTR_NOPS}, |
| 934 | {"my", no_argument, NULL, OPTION_WARN_INTR_NOPS}, |
| 935 | {"md", no_argument, NULL, OPTION_MOVE_DATA}, |
| 936 | {NULL, no_argument, NULL, 0} |
| 937 | }; |
| 938 | |
| 939 | size_t md_longopts_size = sizeof (md_longopts); |
| 940 | |
| 941 | void |
| 942 | md_show_usage (FILE * stream) |
| 943 | { |
| 944 | fprintf (stream, |
| 945 | _("MSP430 options:\n" |
| 946 | " -mmcu=<msp430-name> - select microcontroller type\n" |
| 947 | " -mcpu={430|430x|430xv2} - select microcontroller architecture\n")); |
| 948 | fprintf (stream, |
| 949 | _(" -mQ - enable relaxation at assembly time. DANGEROUS!\n" |
| 950 | " -mP - enable polymorph instructions\n")); |
| 951 | fprintf (stream, |
| 952 | _(" -ml - enable large code model\n")); |
| 953 | fprintf (stream, |
| 954 | _(" -mN - do not insert NOPs after changing interrupts (default)\n")); |
| 955 | fprintf (stream, |
| 956 | _(" -mn - insert a NOP after changing interrupts\n")); |
| 957 | fprintf (stream, |
| 958 | _(" -mY - do not warn about missing NOPs after changing interrupts\n")); |
| 959 | fprintf (stream, |
| 960 | _(" -my - warn about missing NOPs after changing interrupts (default)\n")); |
| 961 | fprintf (stream, |
| 962 | _(" -md - Force copying of data from ROM to RAM at startup\n")); |
| 963 | } |
| 964 | |
| 965 | symbolS * |
| 966 | md_undefined_symbol (char * name ATTRIBUTE_UNUSED) |
| 967 | { |
| 968 | return NULL; |
| 969 | } |
| 970 | |
| 971 | static char * |
| 972 | extract_cmd (char * from, char * to, int limit) |
| 973 | { |
| 974 | int size = 0; |
| 975 | |
| 976 | while (*from && ! ISSPACE (*from) && *from != '.' && limit > size) |
| 977 | { |
| 978 | *(to + size) = *from; |
| 979 | from++; |
| 980 | size++; |
| 981 | } |
| 982 | |
| 983 | *(to + size) = 0; |
| 984 | |
| 985 | return from; |
| 986 | } |
| 987 | |
| 988 | char * |
| 989 | md_atof (int type, char * litP, int * sizeP) |
| 990 | { |
| 991 | return ieee_md_atof (type, litP, sizeP, FALSE); |
| 992 | } |
| 993 | |
| 994 | void |
| 995 | md_begin (void) |
| 996 | { |
| 997 | struct msp430_opcode_s * opcode; |
| 998 | msp430_hash = hash_new (); |
| 999 | |
| 1000 | for (opcode = msp430_opcodes; opcode->name; opcode++) |
| 1001 | hash_insert (msp430_hash, opcode->name, (char *) opcode); |
| 1002 | |
| 1003 | bfd_set_arch_mach (stdoutput, TARGET_ARCH, |
| 1004 | target_is_430x () ? bfd_mach_msp430x : bfd_mach_msp11); |
| 1005 | } |
| 1006 | |
| 1007 | /* Returns the register number equivalent to the string T. |
| 1008 | Returns -1 if there is no such register. |
| 1009 | Skips a leading 'r' or 'R' character if there is one. |
| 1010 | Handles the register aliases PC and SP. */ |
| 1011 | |
| 1012 | static signed int |
| 1013 | check_reg (char * t) |
| 1014 | { |
| 1015 | signed int val; |
| 1016 | |
| 1017 | if (t == NULL) |
| 1018 | return -1; |
| 1019 | |
| 1020 | if (*t == 'r' || *t == 'R') |
| 1021 | ++t; |
| 1022 | |
| 1023 | if (strncasecmp (t, "pc", 2) == 0) |
| 1024 | return 0; |
| 1025 | |
| 1026 | if (strncasecmp (t, "sp", 2) == 0) |
| 1027 | return 1; |
| 1028 | |
| 1029 | if (strncasecmp (t, "sr", 2) == 0) |
| 1030 | return 2; |
| 1031 | |
| 1032 | if (*t == '0') |
| 1033 | return 0; |
| 1034 | |
| 1035 | val = atoi (t); |
| 1036 | |
| 1037 | if (val < 1 || val > 15) |
| 1038 | return -1; |
| 1039 | |
| 1040 | return val; |
| 1041 | } |
| 1042 | |
| 1043 | static int |
| 1044 | msp430_srcoperand (struct msp430_operand_s * op, |
| 1045 | char * l, |
| 1046 | int bin, |
| 1047 | bfd_boolean * imm_op, |
| 1048 | bfd_boolean allow_20bit_values, |
| 1049 | bfd_boolean constants_allowed) |
| 1050 | { |
| 1051 | char *__tl = l; |
| 1052 | |
| 1053 | /* Check if an immediate #VALUE. The hash sign should be only at the beginning! */ |
| 1054 | if (*l == '#') |
| 1055 | { |
| 1056 | char *h = l; |
| 1057 | int vshift = -1; |
| 1058 | int rval = 0; |
| 1059 | |
| 1060 | /* Check if there is: |
| 1061 | llo(x) - least significant 16 bits, x &= 0xffff |
| 1062 | lhi(x) - x = (x >> 16) & 0xffff, |
| 1063 | hlo(x) - x = (x >> 32) & 0xffff, |
| 1064 | hhi(x) - x = (x >> 48) & 0xffff |
| 1065 | The value _MUST_ be constant expression: #hlo(1231231231). */ |
| 1066 | |
| 1067 | *imm_op = TRUE; |
| 1068 | |
| 1069 | if (strncasecmp (h, "#llo(", 5) == 0) |
| 1070 | { |
| 1071 | vshift = 0; |
| 1072 | rval = 3; |
| 1073 | } |
| 1074 | else if (strncasecmp (h, "#lhi(", 5) == 0) |
| 1075 | { |
| 1076 | vshift = 1; |
| 1077 | rval = 3; |
| 1078 | } |
| 1079 | else if (strncasecmp (h, "#hlo(", 5) == 0) |
| 1080 | { |
| 1081 | vshift = 2; |
| 1082 | rval = 3; |
| 1083 | } |
| 1084 | else if (strncasecmp (h, "#hhi(", 5) == 0) |
| 1085 | { |
| 1086 | vshift = 3; |
| 1087 | rval = 3; |
| 1088 | } |
| 1089 | else if (strncasecmp (h, "#lo(", 4) == 0) |
| 1090 | { |
| 1091 | vshift = 0; |
| 1092 | rval = 2; |
| 1093 | } |
| 1094 | else if (strncasecmp (h, "#hi(", 4) == 0) |
| 1095 | { |
| 1096 | vshift = 1; |
| 1097 | rval = 2; |
| 1098 | } |
| 1099 | |
| 1100 | op->reg = 0; /* Reg PC. */ |
| 1101 | op->am = 3; |
| 1102 | op->ol = 1; /* Immediate will follow an instruction. */ |
| 1103 | __tl = h + 1 + rval; |
| 1104 | op->mode = OP_EXP; |
| 1105 | op->vshift = vshift; |
| 1106 | |
| 1107 | parse_exp (__tl, &(op->exp)); |
| 1108 | if (op->exp.X_op == O_constant) |
| 1109 | { |
| 1110 | int x = op->exp.X_add_number; |
| 1111 | |
| 1112 | if (vshift == 0) |
| 1113 | { |
| 1114 | x = x & 0xffff; |
| 1115 | op->exp.X_add_number = x; |
| 1116 | } |
| 1117 | else if (vshift == 1) |
| 1118 | { |
| 1119 | x = (x >> 16) & 0xffff; |
| 1120 | op->exp.X_add_number = x; |
| 1121 | op->vshift = 0; |
| 1122 | } |
| 1123 | else if (vshift > 1) |
| 1124 | { |
| 1125 | if (x < 0) |
| 1126 | op->exp.X_add_number = -1; |
| 1127 | else |
| 1128 | op->exp.X_add_number = 0; /* Nothing left. */ |
| 1129 | x = op->exp.X_add_number; |
| 1130 | op->vshift = 0; |
| 1131 | } |
| 1132 | |
| 1133 | if (allow_20bit_values) |
| 1134 | { |
| 1135 | if (op->exp.X_add_number > 0xfffff || op->exp.X_add_number < -524288) |
| 1136 | { |
| 1137 | as_bad (_("value 0x%x out of extended range."), x); |
| 1138 | return 1; |
| 1139 | } |
| 1140 | } |
| 1141 | else if (op->exp.X_add_number > 65535 || op->exp.X_add_number < -32768) |
| 1142 | { |
| 1143 | as_bad (_("value %d out of range. Use #lo() or #hi()"), x); |
| 1144 | return 1; |
| 1145 | } |
| 1146 | |
| 1147 | /* Now check constants. */ |
| 1148 | /* Substitute register mode with a constant generator if applicable. */ |
| 1149 | |
| 1150 | if (!allow_20bit_values) |
| 1151 | x = (short) x; /* Extend sign. */ |
| 1152 | |
| 1153 | if (! constants_allowed) |
| 1154 | ; |
| 1155 | else if (x == 0) |
| 1156 | { |
| 1157 | op->reg = 3; |
| 1158 | op->am = 0; |
| 1159 | op->ol = 0; |
| 1160 | op->mode = OP_REG; |
| 1161 | } |
| 1162 | else if (x == 1) |
| 1163 | { |
| 1164 | op->reg = 3; |
| 1165 | op->am = 1; |
| 1166 | op->ol = 0; |
| 1167 | op->mode = OP_REG; |
| 1168 | } |
| 1169 | else if (x == 2) |
| 1170 | { |
| 1171 | op->reg = 3; |
| 1172 | op->am = 2; |
| 1173 | op->ol = 0; |
| 1174 | op->mode = OP_REG; |
| 1175 | } |
| 1176 | else if (x == -1) |
| 1177 | { |
| 1178 | op->reg = 3; |
| 1179 | op->am = 3; |
| 1180 | op->ol = 0; |
| 1181 | op->mode = OP_REG; |
| 1182 | } |
| 1183 | else if (x == 4) |
| 1184 | { |
| 1185 | #ifdef PUSH_1X_WORKAROUND |
| 1186 | if (bin == 0x1200) |
| 1187 | { |
| 1188 | /* Remove warning as confusing. |
| 1189 | as_warn (_("Hardware push bug workaround")); */ |
| 1190 | } |
| 1191 | else |
| 1192 | #endif |
| 1193 | { |
| 1194 | op->reg = 2; |
| 1195 | op->am = 2; |
| 1196 | op->ol = 0; |
| 1197 | op->mode = OP_REG; |
| 1198 | } |
| 1199 | } |
| 1200 | else if (x == 8) |
| 1201 | { |
| 1202 | #ifdef PUSH_1X_WORKAROUND |
| 1203 | if (bin == 0x1200) |
| 1204 | { |
| 1205 | /* Remove warning as confusing. |
| 1206 | as_warn (_("Hardware push bug workaround")); */ |
| 1207 | } |
| 1208 | else |
| 1209 | #endif |
| 1210 | { |
| 1211 | op->reg = 2; |
| 1212 | op->am = 3; |
| 1213 | op->ol = 0; |
| 1214 | op->mode = OP_REG; |
| 1215 | } |
| 1216 | } |
| 1217 | } |
| 1218 | else if (op->exp.X_op == O_symbol) |
| 1219 | { |
| 1220 | if (vshift > 1) |
| 1221 | as_bad (_("error: unsupported #foo() directive used on symbol")); |
| 1222 | op->mode = OP_EXP; |
| 1223 | } |
| 1224 | else if (op->exp.X_op == O_big) |
| 1225 | { |
| 1226 | short x; |
| 1227 | |
| 1228 | if (vshift != -1) |
| 1229 | { |
| 1230 | op->exp.X_op = O_constant; |
| 1231 | op->exp.X_add_number = 0xffff & generic_bignum[vshift]; |
| 1232 | x = op->exp.X_add_number; |
| 1233 | op->vshift = 0; |
| 1234 | } |
| 1235 | else |
| 1236 | { |
| 1237 | as_bad (_ |
| 1238 | ("unknown expression in operand %s. use #llo() #lhi() #hlo() #hhi() "), |
| 1239 | l); |
| 1240 | return 1; |
| 1241 | } |
| 1242 | |
| 1243 | if (x == 0) |
| 1244 | { |
| 1245 | op->reg = 3; |
| 1246 | op->am = 0; |
| 1247 | op->ol = 0; |
| 1248 | op->mode = OP_REG; |
| 1249 | } |
| 1250 | else if (x == 1) |
| 1251 | { |
| 1252 | op->reg = 3; |
| 1253 | op->am = 1; |
| 1254 | op->ol = 0; |
| 1255 | op->mode = OP_REG; |
| 1256 | } |
| 1257 | else if (x == 2) |
| 1258 | { |
| 1259 | op->reg = 3; |
| 1260 | op->am = 2; |
| 1261 | op->ol = 0; |
| 1262 | op->mode = OP_REG; |
| 1263 | } |
| 1264 | else if (x == -1) |
| 1265 | { |
| 1266 | op->reg = 3; |
| 1267 | op->am = 3; |
| 1268 | op->ol = 0; |
| 1269 | op->mode = OP_REG; |
| 1270 | } |
| 1271 | else if (x == 4) |
| 1272 | { |
| 1273 | op->reg = 2; |
| 1274 | op->am = 2; |
| 1275 | op->ol = 0; |
| 1276 | op->mode = OP_REG; |
| 1277 | } |
| 1278 | else if (x == 8) |
| 1279 | { |
| 1280 | op->reg = 2; |
| 1281 | op->am = 3; |
| 1282 | op->ol = 0; |
| 1283 | op->mode = OP_REG; |
| 1284 | } |
| 1285 | } |
| 1286 | /* Redundant (yet) check. */ |
| 1287 | else if (op->exp.X_op == O_register) |
| 1288 | as_bad |
| 1289 | (_("Registers cannot be used within immediate expression [%s]"), l); |
| 1290 | else |
| 1291 | as_bad (_("unknown operand %s"), l); |
| 1292 | |
| 1293 | return 0; |
| 1294 | } |
| 1295 | |
| 1296 | /* Check if absolute &VALUE (assume that we can construct something like ((a&b)<<7 + 25). */ |
| 1297 | if (*l == '&') |
| 1298 | { |
| 1299 | char *h = l; |
| 1300 | |
| 1301 | op->reg = 2; /* reg 2 in absolute addr mode. */ |
| 1302 | op->am = 1; /* mode As == 01 bin. */ |
| 1303 | op->ol = 1; /* Immediate value followed by instruction. */ |
| 1304 | __tl = h + 1; |
| 1305 | parse_exp (__tl, &(op->exp)); |
| 1306 | op->mode = OP_EXP; |
| 1307 | op->vshift = 0; |
| 1308 | if (op->exp.X_op == O_constant) |
| 1309 | { |
| 1310 | int x = op->exp.X_add_number; |
| 1311 | |
| 1312 | if (allow_20bit_values) |
| 1313 | { |
| 1314 | if (x > 0xfffff || x < -(0x7ffff)) |
| 1315 | { |
| 1316 | as_bad (_("value 0x%x out of extended range."), x); |
| 1317 | return 1; |
| 1318 | } |
| 1319 | } |
| 1320 | else if (x > 65535 || x < -32768) |
| 1321 | { |
| 1322 | as_bad (_("value out of range: 0x%x"), x); |
| 1323 | return 1; |
| 1324 | } |
| 1325 | } |
| 1326 | else if (op->exp.X_op == O_symbol) |
| 1327 | ; |
| 1328 | else |
| 1329 | { |
| 1330 | /* Redundant (yet) check. */ |
| 1331 | if (op->exp.X_op == O_register) |
| 1332 | as_bad |
| 1333 | (_("Registers cannot be used within absolute expression [%s]"), l); |
| 1334 | else |
| 1335 | as_bad (_("unknown expression in operand %s"), l); |
| 1336 | return 1; |
| 1337 | } |
| 1338 | return 0; |
| 1339 | } |
| 1340 | |
| 1341 | /* Check if indirect register mode @Rn / postincrement @Rn+. */ |
| 1342 | if (*l == '@') |
| 1343 | { |
| 1344 | char *t = l; |
| 1345 | char *m = strchr (l, '+'); |
| 1346 | |
| 1347 | if (t != l) |
| 1348 | { |
| 1349 | as_bad (_("unknown addressing mode %s"), l); |
| 1350 | return 1; |
| 1351 | } |
| 1352 | |
| 1353 | t++; |
| 1354 | |
| 1355 | if ((op->reg = check_reg (t)) == -1) |
| 1356 | { |
| 1357 | as_bad (_("Bad register name %s"), t); |
| 1358 | return 1; |
| 1359 | } |
| 1360 | |
| 1361 | op->mode = OP_REG; |
| 1362 | op->am = m ? 3 : 2; |
| 1363 | op->ol = 0; |
| 1364 | |
| 1365 | /* PC cannot be used in indirect addressing. */ |
| 1366 | if (target_is_430xv2 () && op->reg == 0) |
| 1367 | { |
| 1368 | as_bad (_("cannot use indirect addressing with the PC")); |
| 1369 | return 1; |
| 1370 | } |
| 1371 | |
| 1372 | return 0; |
| 1373 | } |
| 1374 | |
| 1375 | /* Check if register indexed X(Rn). */ |
| 1376 | do |
| 1377 | { |
| 1378 | char *h = strrchr (l, '('); |
| 1379 | char *m = strrchr (l, ')'); |
| 1380 | char *t; |
| 1381 | |
| 1382 | *imm_op = TRUE; |
| 1383 | |
| 1384 | if (!h) |
| 1385 | break; |
| 1386 | if (!m) |
| 1387 | { |
| 1388 | as_bad (_("')' required")); |
| 1389 | return 1; |
| 1390 | } |
| 1391 | |
| 1392 | t = h; |
| 1393 | op->am = 1; |
| 1394 | op->ol = 1; |
| 1395 | |
| 1396 | /* Extract a register. */ |
| 1397 | if ((op->reg = check_reg (t + 1)) == -1) |
| 1398 | { |
| 1399 | as_bad (_ |
| 1400 | ("unknown operator %s. Did you mean X(Rn) or #[hl][hl][oi](CONST) ?"), |
| 1401 | l); |
| 1402 | return 1; |
| 1403 | } |
| 1404 | |
| 1405 | if (op->reg == 2) |
| 1406 | { |
| 1407 | as_bad (_("r2 should not be used in indexed addressing mode")); |
| 1408 | return 1; |
| 1409 | } |
| 1410 | |
| 1411 | /* Extract constant. */ |
| 1412 | __tl = l; |
| 1413 | *h = 0; |
| 1414 | op->mode = OP_EXP; |
| 1415 | op->vshift = 0; |
| 1416 | parse_exp (__tl, &(op->exp)); |
| 1417 | if (op->exp.X_op == O_constant) |
| 1418 | { |
| 1419 | int x = op->exp.X_add_number; |
| 1420 | |
| 1421 | if (allow_20bit_values) |
| 1422 | { |
| 1423 | if (x > 0xfffff || x < - (0x7ffff)) |
| 1424 | { |
| 1425 | as_bad (_("value 0x%x out of extended range."), x); |
| 1426 | return 1; |
| 1427 | } |
| 1428 | } |
| 1429 | else if (x > 65535 || x < -32768) |
| 1430 | { |
| 1431 | as_bad (_("value out of range: 0x%x"), x); |
| 1432 | return 1; |
| 1433 | } |
| 1434 | |
| 1435 | if (x == 0) |
| 1436 | { |
| 1437 | op->mode = OP_REG; |
| 1438 | op->am = 2; |
| 1439 | op->ol = 0; |
| 1440 | return 0; |
| 1441 | } |
| 1442 | } |
| 1443 | else if (op->exp.X_op == O_symbol) |
| 1444 | ; |
| 1445 | else |
| 1446 | { |
| 1447 | /* Redundant (yet) check. */ |
| 1448 | if (op->exp.X_op == O_register) |
| 1449 | as_bad |
| 1450 | (_("Registers cannot be used as a prefix of indexed expression [%s]"), l); |
| 1451 | else |
| 1452 | as_bad (_("unknown expression in operand %s"), l); |
| 1453 | return 1; |
| 1454 | } |
| 1455 | |
| 1456 | return 0; |
| 1457 | } |
| 1458 | while (0); |
| 1459 | |
| 1460 | /* Possibly register mode 'mov r1,r2'. */ |
| 1461 | if ((op->reg = check_reg (l)) != -1) |
| 1462 | { |
| 1463 | op->mode = OP_REG; |
| 1464 | op->am = 0; |
| 1465 | op->ol = 0; |
| 1466 | return 0; |
| 1467 | } |
| 1468 | |
| 1469 | /* Symbolic mode 'mov a, b' == 'mov x(pc), y(pc)'. */ |
| 1470 | do |
| 1471 | { |
| 1472 | op->mode = OP_EXP; |
| 1473 | op->reg = 0; /* PC relative... be careful. */ |
| 1474 | /* An expression starting with a minus sign is a constant, not an address. */ |
| 1475 | op->am = (*l == '-' ? 3 : 1); |
| 1476 | op->ol = 1; |
| 1477 | op->vshift = 0; |
| 1478 | __tl = l; |
| 1479 | parse_exp (__tl, &(op->exp)); |
| 1480 | return 0; |
| 1481 | } |
| 1482 | while (0); |
| 1483 | |
| 1484 | /* Unreachable. */ |
| 1485 | as_bad (_("unknown addressing mode for operand %s"), l); |
| 1486 | return 1; |
| 1487 | } |
| 1488 | |
| 1489 | |
| 1490 | static int |
| 1491 | msp430_dstoperand (struct msp430_operand_s * op, |
| 1492 | char * l, |
| 1493 | int bin, |
| 1494 | bfd_boolean allow_20bit_values, |
| 1495 | bfd_boolean constants_allowed) |
| 1496 | { |
| 1497 | int dummy; |
| 1498 | int ret = msp430_srcoperand (op, l, bin, & dummy, |
| 1499 | allow_20bit_values, |
| 1500 | constants_allowed); |
| 1501 | |
| 1502 | if (ret) |
| 1503 | return ret; |
| 1504 | |
| 1505 | if (op->am == 2) |
| 1506 | { |
| 1507 | char *__tl = "0"; |
| 1508 | |
| 1509 | op->mode = OP_EXP; |
| 1510 | op->am = 1; |
| 1511 | op->ol = 1; |
| 1512 | op->vshift = 0; |
| 1513 | parse_exp (__tl, &(op->exp)); |
| 1514 | |
| 1515 | if (op->exp.X_op != O_constant || op->exp.X_add_number != 0) |
| 1516 | { |
| 1517 | as_bad (_("Internal bug. Try to use 0(r%d) instead of @r%d"), |
| 1518 | op->reg, op->reg); |
| 1519 | return 1; |
| 1520 | } |
| 1521 | return 0; |
| 1522 | } |
| 1523 | |
| 1524 | if (op->am > 1) |
| 1525 | { |
| 1526 | as_bad (_ |
| 1527 | ("this addressing mode is not applicable for destination operand")); |
| 1528 | return 1; |
| 1529 | } |
| 1530 | return 0; |
| 1531 | } |
| 1532 | |
| 1533 | /* Attempt to encode a MOVA instruction with the given operands. |
| 1534 | Returns the length of the encoded instruction if successful |
| 1535 | or 0 upon failure. If the encoding fails, an error message |
| 1536 | will be returned if a pointer is provided. */ |
| 1537 | |
| 1538 | static int |
| 1539 | try_encode_mova (bfd_boolean imm_op, |
| 1540 | int bin, |
| 1541 | struct msp430_operand_s * op1, |
| 1542 | struct msp430_operand_s * op2, |
| 1543 | const char ** error_message_return) |
| 1544 | { |
| 1545 | short ZEROS = 0; |
| 1546 | char *frag; |
| 1547 | int where; |
| 1548 | |
| 1549 | /* Only a restricted subset of the normal MSP430 addressing modes |
| 1550 | are supported here, so check for the ones that are allowed. */ |
| 1551 | if (imm_op) |
| 1552 | { |
| 1553 | if (op1->mode == OP_EXP) |
| 1554 | { |
| 1555 | if (op2->mode != OP_REG) |
| 1556 | { |
| 1557 | if (error_message_return != NULL) |
| 1558 | * error_message_return = _("expected register as second argument of %s"); |
| 1559 | return 0; |
| 1560 | } |
| 1561 | |
| 1562 | if (op1->am == 3) |
| 1563 | { |
| 1564 | /* MOVA #imm20, Rdst. */ |
| 1565 | bin |= 0x80 | op2->reg; |
| 1566 | frag = frag_more (4); |
| 1567 | where = frag - frag_now->fr_literal; |
| 1568 | if (op1->exp.X_op == O_constant) |
| 1569 | { |
| 1570 | bin |= ((op1->exp.X_add_number >> 16) & 0xf) << 8; |
| 1571 | bfd_putl16 ((bfd_vma) bin, frag); |
| 1572 | bfd_putl16 (op1->exp.X_add_number & 0xffff, frag + 2); |
| 1573 | } |
| 1574 | else |
| 1575 | { |
| 1576 | bfd_putl16 ((bfd_vma) bin, frag); |
| 1577 | fix_new_exp (frag_now, where, 4, &(op1->exp), FALSE, |
| 1578 | BFD_RELOC_MSP430X_ABS20_ADR_SRC); |
| 1579 | bfd_putl16 ((bfd_vma) ZEROS, frag + 2); |
| 1580 | } |
| 1581 | |
| 1582 | return 4; |
| 1583 | } |
| 1584 | else if (op1->am == 1) |
| 1585 | { |
| 1586 | /* MOVA z16(Rsrc), Rdst. */ |
| 1587 | bin |= 0x30 | (op1->reg << 8) | op2->reg; |
| 1588 | frag = frag_more (4); |
| 1589 | where = frag - frag_now->fr_literal; |
| 1590 | bfd_putl16 ((bfd_vma) bin, frag); |
| 1591 | if (op1->exp.X_op == O_constant) |
| 1592 | { |
| 1593 | if (op1->exp.X_add_number > 0xffff |
| 1594 | || op1->exp.X_add_number < -(0x7fff)) |
| 1595 | { |
| 1596 | if (error_message_return != NULL) |
| 1597 | * error_message_return = _("index value too big for %s"); |
| 1598 | return 0; |
| 1599 | } |
| 1600 | bfd_putl16 (op1->exp.X_add_number & 0xffff, frag + 2); |
| 1601 | } |
| 1602 | else |
| 1603 | { |
| 1604 | bfd_putl16 ((bfd_vma) ZEROS, frag + 2); |
| 1605 | fix_new_exp (frag_now, where + 2, 2, &(op1->exp), FALSE, |
| 1606 | op1->reg == 0 ? |
| 1607 | BFD_RELOC_MSP430X_PCR16 : |
| 1608 | BFD_RELOC_MSP430X_ABS16); |
| 1609 | } |
| 1610 | return 4; |
| 1611 | } |
| 1612 | |
| 1613 | if (error_message_return != NULL) |
| 1614 | * error_message_return = _("unexpected addressing mode for %s"); |
| 1615 | return 0; |
| 1616 | } |
| 1617 | else if (op1->am == 0) |
| 1618 | { |
| 1619 | /* MOVA Rsrc, ... */ |
| 1620 | if (op2->mode == OP_REG) |
| 1621 | { |
| 1622 | bin |= 0xc0 | (op1->reg << 8) | op2->reg; |
| 1623 | frag = frag_more (2); |
| 1624 | where = frag - frag_now->fr_literal; |
| 1625 | bfd_putl16 ((bfd_vma) bin, frag); |
| 1626 | return 2; |
| 1627 | } |
| 1628 | else if (op2->am == 1) |
| 1629 | { |
| 1630 | if (op2->reg == 2) |
| 1631 | { |
| 1632 | /* MOVA Rsrc, &abs20. */ |
| 1633 | bin |= 0x60 | (op1->reg << 8); |
| 1634 | frag = frag_more (4); |
| 1635 | where = frag - frag_now->fr_literal; |
| 1636 | if (op2->exp.X_op == O_constant) |
| 1637 | { |
| 1638 | bin |= (op2->exp.X_add_number >> 16) & 0xf; |
| 1639 | bfd_putl16 ((bfd_vma) bin, frag); |
| 1640 | bfd_putl16 (op2->exp.X_add_number & 0xffff, frag + 2); |
| 1641 | } |
| 1642 | else |
| 1643 | { |
| 1644 | bfd_putl16 ((bfd_vma) bin, frag); |
| 1645 | bfd_putl16 ((bfd_vma) ZEROS, frag + 2); |
| 1646 | fix_new_exp (frag_now, where, 4, &(op2->exp), FALSE, |
| 1647 | BFD_RELOC_MSP430X_ABS20_ADR_DST); |
| 1648 | } |
| 1649 | return 4; |
| 1650 | } |
| 1651 | |
| 1652 | /* MOVA Rsrc, z16(Rdst). */ |
| 1653 | bin |= 0x70 | (op1->reg << 8) | op2->reg; |
| 1654 | frag = frag_more (4); |
| 1655 | where = frag - frag_now->fr_literal; |
| 1656 | bfd_putl16 ((bfd_vma) bin, frag); |
| 1657 | if (op2->exp.X_op == O_constant) |
| 1658 | { |
| 1659 | if (op2->exp.X_add_number > 0xffff |
| 1660 | || op2->exp.X_add_number < -(0x7fff)) |
| 1661 | { |
| 1662 | if (error_message_return != NULL) |
| 1663 | * error_message_return = _("index value too big for %s"); |
| 1664 | return 0; |
| 1665 | } |
| 1666 | bfd_putl16 (op2->exp.X_add_number & 0xffff, frag + 2); |
| 1667 | } |
| 1668 | else |
| 1669 | { |
| 1670 | bfd_putl16 ((bfd_vma) ZEROS, frag + 2); |
| 1671 | fix_new_exp (frag_now, where + 2, 2, &(op2->exp), FALSE, |
| 1672 | op2->reg == 0 ? |
| 1673 | BFD_RELOC_MSP430X_PCR16 : |
| 1674 | BFD_RELOC_MSP430X_ABS16); |
| 1675 | } |
| 1676 | return 4; |
| 1677 | } |
| 1678 | |
| 1679 | if (error_message_return != NULL) |
| 1680 | * error_message_return = _("unexpected addressing mode for %s"); |
| 1681 | return 0; |
| 1682 | } |
| 1683 | } |
| 1684 | |
| 1685 | /* imm_op == FALSE. */ |
| 1686 | |
| 1687 | if (op1->reg == 2 && op1->am == 1 && op1->mode == OP_EXP) |
| 1688 | { |
| 1689 | /* MOVA &abs20, Rdst. */ |
| 1690 | if (op2->mode != OP_REG) |
| 1691 | { |
| 1692 | if (error_message_return != NULL) |
| 1693 | * error_message_return = _("expected register as second argument of %s"); |
| 1694 | return 0; |
| 1695 | } |
| 1696 | |
| 1697 | if (op2->reg == 2 || op2->reg == 3) |
| 1698 | { |
| 1699 | if (error_message_return != NULL) |
| 1700 | * error_message_return = _("constant generator destination register found in %s"); |
| 1701 | return 0; |
| 1702 | } |
| 1703 | |
| 1704 | bin |= 0x20 | op2->reg; |
| 1705 | frag = frag_more (4); |
| 1706 | where = frag - frag_now->fr_literal; |
| 1707 | if (op1->exp.X_op == O_constant) |
| 1708 | { |
| 1709 | bin |= ((op1->exp.X_add_number >> 16) & 0xf) << 8; |
| 1710 | bfd_putl16 ((bfd_vma) bin, frag); |
| 1711 | bfd_putl16 (op1->exp.X_add_number & 0xffff, frag + 2); |
| 1712 | } |
| 1713 | else |
| 1714 | { |
| 1715 | bfd_putl16 ((bfd_vma) bin, frag); |
| 1716 | bfd_putl16 ((bfd_vma) ZEROS, frag + 2); |
| 1717 | fix_new_exp (frag_now, where, 4, &(op1->exp), FALSE, |
| 1718 | BFD_RELOC_MSP430X_ABS20_ADR_SRC); |
| 1719 | } |
| 1720 | return 4; |
| 1721 | } |
| 1722 | else if (op1->mode == OP_REG) |
| 1723 | { |
| 1724 | if (op1->am == 3) |
| 1725 | { |
| 1726 | /* MOVA @Rsrc+, Rdst. */ |
| 1727 | if (op2->mode != OP_REG) |
| 1728 | { |
| 1729 | if (error_message_return != NULL) |
| 1730 | * error_message_return = _("expected register as second argument of %s"); |
| 1731 | return 0; |
| 1732 | } |
| 1733 | |
| 1734 | if (op2->reg == 2 || op2->reg == 3) |
| 1735 | { |
| 1736 | if (error_message_return != NULL) |
| 1737 | * error_message_return = _("constant generator destination register found in %s"); |
| 1738 | return 0; |
| 1739 | } |
| 1740 | |
| 1741 | if (op1->reg == 2 || op1->reg == 3) |
| 1742 | { |
| 1743 | if (error_message_return != NULL) |
| 1744 | * error_message_return = _("constant generator source register found in %s"); |
| 1745 | return 0; |
| 1746 | } |
| 1747 | |
| 1748 | bin |= 0x10 | (op1->reg << 8) | op2->reg; |
| 1749 | frag = frag_more (2); |
| 1750 | where = frag - frag_now->fr_literal; |
| 1751 | bfd_putl16 ((bfd_vma) bin, frag); |
| 1752 | return 2; |
| 1753 | } |
| 1754 | else if (op1->am == 2) |
| 1755 | { |
| 1756 | /* MOVA @Rsrc,Rdst */ |
| 1757 | if (op2->mode != OP_REG) |
| 1758 | { |
| 1759 | if (error_message_return != NULL) |
| 1760 | * error_message_return = _("expected register as second argument of %s"); |
| 1761 | return 0; |
| 1762 | } |
| 1763 | |
| 1764 | if (op2->reg == 2 || op2->reg == 3) |
| 1765 | { |
| 1766 | if (error_message_return != NULL) |
| 1767 | * error_message_return = _("constant generator destination register found in %s"); |
| 1768 | return 0; |
| 1769 | } |
| 1770 | |
| 1771 | if (op1->reg == 2 || op1->reg == 3) |
| 1772 | { |
| 1773 | if (error_message_return != NULL) |
| 1774 | * error_message_return = _("constant generator source register found in %s"); |
| 1775 | return 0; |
| 1776 | } |
| 1777 | |
| 1778 | bin |= (op1->reg << 8) | op2->reg; |
| 1779 | frag = frag_more (2); |
| 1780 | where = frag - frag_now->fr_literal; |
| 1781 | bfd_putl16 ((bfd_vma) bin, frag); |
| 1782 | return 2; |
| 1783 | } |
| 1784 | } |
| 1785 | |
| 1786 | if (error_message_return != NULL) |
| 1787 | * error_message_return = _("unexpected addressing mode for %s"); |
| 1788 | |
| 1789 | return 0; |
| 1790 | } |
| 1791 | |
| 1792 | static bfd_boolean check_for_nop = FALSE; |
| 1793 | |
| 1794 | #define is_opcode(NAME) (strcmp (opcode->name, NAME) == 0) |
| 1795 | |
| 1796 | /* Parse instruction operands. |
| 1797 | Return binary opcode. */ |
| 1798 | |
| 1799 | static unsigned int |
| 1800 | msp430_operands (struct msp430_opcode_s * opcode, char * line) |
| 1801 | { |
| 1802 | int bin = opcode->bin_opcode; /* Opcode mask. */ |
| 1803 | int insn_length = 0; |
| 1804 | char l1[MAX_OP_LEN], l2[MAX_OP_LEN]; |
| 1805 | char *frag; |
| 1806 | int where; |
| 1807 | struct msp430_operand_s op1, op2; |
| 1808 | int res = 0; |
| 1809 | static short ZEROS = 0; |
| 1810 | bfd_boolean byte_op, imm_op; |
| 1811 | int op_length = 0; |
| 1812 | int fmt; |
| 1813 | int extended = 0x1800; |
| 1814 | bfd_boolean extended_op = FALSE; |
| 1815 | bfd_boolean addr_op; |
| 1816 | const char * error_message; |
| 1817 | static signed int repeat_count = 0; |
| 1818 | bfd_boolean fix_emitted; |
| 1819 | bfd_boolean nop_check_needed = FALSE; |
| 1820 | |
| 1821 | /* Opcode is the one from opcodes table |
| 1822 | line contains something like |
| 1823 | [.w] @r2+, 5(R1) |
| 1824 | or |
| 1825 | .b @r2+, 5(R1). */ |
| 1826 | |
| 1827 | byte_op = FALSE; |
| 1828 | addr_op = FALSE; |
| 1829 | if (*line == '.') |
| 1830 | { |
| 1831 | bfd_boolean check = FALSE; |
| 1832 | ++ line; |
| 1833 | |
| 1834 | switch (TOLOWER (* line)) |
| 1835 | { |
| 1836 | case 'b': |
| 1837 | /* Byte operation. */ |
| 1838 | bin |= BYTE_OPERATION; |
| 1839 | byte_op = TRUE; |
| 1840 | check = TRUE; |
| 1841 | break; |
| 1842 | |
| 1843 | case 'a': |
| 1844 | /* "Address" ops work on 20-bit values. */ |
| 1845 | addr_op = TRUE; |
| 1846 | bin |= BYTE_OPERATION; |
| 1847 | check = TRUE; |
| 1848 | break; |
| 1849 | |
| 1850 | case 'w': |
| 1851 | /* Word operation - this is the default. */ |
| 1852 | check = TRUE; |
| 1853 | break; |
| 1854 | |
| 1855 | case 0: |
| 1856 | case ' ': |
| 1857 | case '\n': |
| 1858 | case '\r': |
| 1859 | as_warn (_("no size modifier after period, .w assumed")); |
| 1860 | break; |
| 1861 | |
| 1862 | default: |
| 1863 | as_bad (_("unrecognised instruction size modifier .%c"), |
| 1864 | * line); |
| 1865 | return 0; |
| 1866 | } |
| 1867 | |
| 1868 | if (check) |
| 1869 | { |
| 1870 | ++ line; |
| 1871 | |
| 1872 | } |
| 1873 | } |
| 1874 | |
| 1875 | if (*line && ! ISSPACE (*line)) |
| 1876 | { |
| 1877 | as_bad (_("junk found after instruction: %s.%s"), |
| 1878 | opcode->name, line); |
| 1879 | return 0; |
| 1880 | } |
| 1881 | |
| 1882 | /* Catch the case where the programmer has used a ".a" size modifier on an |
| 1883 | instruction that does not support it. Look for an alternative extended |
| 1884 | instruction that has the same name without the period. Eg: "add.a" |
| 1885 | becomes "adda". Although this not an officially supported way of |
| 1886 | specifing instruction aliases other MSP430 assemblers allow it. So we |
| 1887 | support it for compatibility purposes. */ |
| 1888 | if (addr_op && opcode->fmt >= 0) |
| 1889 | { |
| 1890 | char * old_name = opcode->name; |
| 1891 | char real_name[32]; |
| 1892 | |
| 1893 | sprintf (real_name, "%sa", old_name); |
| 1894 | opcode = hash_find (msp430_hash, real_name); |
| 1895 | if (opcode == NULL) |
| 1896 | { |
| 1897 | as_bad (_("instruction %s.a does not exist"), old_name); |
| 1898 | return 0; |
| 1899 | } |
| 1900 | #if 0 /* Enable for debugging. */ |
| 1901 | as_warn ("treating %s.a as %s", old_name, real_name); |
| 1902 | #endif |
| 1903 | addr_op = FALSE; |
| 1904 | bin = opcode->bin_opcode; |
| 1905 | } |
| 1906 | |
| 1907 | if (opcode->fmt != -1 |
| 1908 | && opcode->insn_opnumb |
| 1909 | && (!*line || *line == '\n')) |
| 1910 | { |
| 1911 | as_bad (_("instruction %s requires %d operand(s)"), |
| 1912 | opcode->name, opcode->insn_opnumb); |
| 1913 | return 0; |
| 1914 | } |
| 1915 | |
| 1916 | memset (l1, 0, sizeof (l1)); |
| 1917 | memset (l2, 0, sizeof (l2)); |
| 1918 | memset (&op1, 0, sizeof (op1)); |
| 1919 | memset (&op2, 0, sizeof (op2)); |
| 1920 | |
| 1921 | imm_op = FALSE; |
| 1922 | |
| 1923 | if ((fmt = opcode->fmt) < 0) |
| 1924 | { |
| 1925 | if (! target_is_430x ()) |
| 1926 | { |
| 1927 | as_bad (_("instruction %s requires MSP430X mcu"), |
| 1928 | opcode->name); |
| 1929 | return 0; |
| 1930 | } |
| 1931 | |
| 1932 | fmt = (-fmt) - 1; |
| 1933 | extended_op = TRUE; |
| 1934 | } |
| 1935 | |
| 1936 | if (repeat_count) |
| 1937 | { |
| 1938 | /* If requested set the extended instruction repeat count. */ |
| 1939 | if (extended_op) |
| 1940 | { |
| 1941 | if (repeat_count > 0) |
| 1942 | extended |= (repeat_count - 1); |
| 1943 | else |
| 1944 | extended |= (1 << 7) | (- repeat_count); |
| 1945 | } |
| 1946 | else |
| 1947 | as_bad (_("unable to repeat %s insn"), opcode->name); |
| 1948 | |
| 1949 | repeat_count = 0; |
| 1950 | } |
| 1951 | |
| 1952 | if (check_for_nop && is_opcode ("nop")) |
| 1953 | check_for_nop = FALSE; |
| 1954 | |
| 1955 | switch (fmt) |
| 1956 | { |
| 1957 | case 0: /* Emulated. */ |
| 1958 | switch (opcode->insn_opnumb) |
| 1959 | { |
| 1960 | case 0: |
| 1961 | if (is_opcode ("eint") || is_opcode ("dint")) |
| 1962 | { |
| 1963 | if (check_for_nop) |
| 1964 | { |
| 1965 | if (warn_interrupt_nops) |
| 1966 | { |
| 1967 | if (gen_interrupt_nops) |
| 1968 | as_warn (_("NOP inserted between two instructions that change interrupt state")); |
| 1969 | else |
| 1970 | as_warn (_("a NOP might be needed here because of successive changes in interrupt state")); |
| 1971 | } |
| 1972 | |
| 1973 | if (gen_interrupt_nops) |
| 1974 | { |
| 1975 | /* Emit a NOP between interrupt enable/disable. |
| 1976 | See 1.3.4.1 of the MSP430x5xx User Guide. */ |
| 1977 | insn_length += 2; |
| 1978 | frag = frag_more (2); |
| 1979 | bfd_putl16 ((bfd_vma) 0x4303 /* NOP */, frag); |
| 1980 | } |
| 1981 | } |
| 1982 | |
| 1983 | nop_check_needed = TRUE; |
| 1984 | } |
| 1985 | |
| 1986 | /* Set/clear bits instructions. */ |
| 1987 | if (extended_op) |
| 1988 | { |
| 1989 | if (!addr_op) |
| 1990 | extended |= BYTE_OPERATION; |
| 1991 | |
| 1992 | /* Emit the extension word. */ |
| 1993 | insn_length += 2; |
| 1994 | frag = frag_more (2); |
| 1995 | bfd_putl16 (extended, frag); |
| 1996 | } |
| 1997 | |
| 1998 | insn_length += 2; |
| 1999 | frag = frag_more (2); |
| 2000 | bfd_putl16 ((bfd_vma) bin, frag); |
| 2001 | dwarf2_emit_insn (insn_length); |
| 2002 | break; |
| 2003 | |
| 2004 | case 1: |
| 2005 | /* Something which works with destination operand. */ |
| 2006 | line = extract_operand (line, l1, sizeof (l1)); |
| 2007 | res = msp430_dstoperand (&op1, l1, opcode->bin_opcode, extended_op, TRUE); |
| 2008 | if (res) |
| 2009 | break; |
| 2010 | |
| 2011 | bin |= (op1.reg | (op1.am << 7)); |
| 2012 | |
| 2013 | if (is_opcode ("clr") && bin == 0x4302 /* CLR R2*/) |
| 2014 | { |
| 2015 | if (check_for_nop) |
| 2016 | { |
| 2017 | if (warn_interrupt_nops) |
| 2018 | { |
| 2019 | if (gen_interrupt_nops) |
| 2020 | as_warn (_("NOP inserted between two instructions that change interrupt state")); |
| 2021 | else |
| 2022 | as_warn (_("a NOP might be needed here because of successive changes in interrupt state")); |
| 2023 | } |
| 2024 | |
| 2025 | if (gen_interrupt_nops) |
| 2026 | { |
| 2027 | /* Emit a NOP between interrupt enable/disable. |
| 2028 | See 1.3.4.1 of the MSP430x5xx User Guide. */ |
| 2029 | insn_length += 2; |
| 2030 | frag = frag_more (2); |
| 2031 | bfd_putl16 ((bfd_vma) 0x4303 /* NOP */, frag); |
| 2032 | } |
| 2033 | } |
| 2034 | |
| 2035 | nop_check_needed = TRUE; |
| 2036 | } |
| 2037 | |
| 2038 | /* Compute the entire instruction length, in bytes. */ |
| 2039 | op_length = (extended_op ? 2 : 0) + 2 + (op1.ol * 2); |
| 2040 | insn_length += op_length; |
| 2041 | frag = frag_more (op_length); |
| 2042 | where = frag - frag_now->fr_literal; |
| 2043 | |
| 2044 | if (extended_op) |
| 2045 | { |
| 2046 | if (!addr_op) |
| 2047 | extended |= BYTE_OPERATION; |
| 2048 | |
| 2049 | if (op1.ol != 0 && ((extended & 0xf) != 0)) |
| 2050 | { |
| 2051 | as_bad (_("repeat instruction used with non-register mode instruction")); |
| 2052 | extended &= ~ 0xf; |
| 2053 | } |
| 2054 | |
| 2055 | if (op1.mode == OP_EXP) |
| 2056 | { |
| 2057 | if (op1.exp.X_op == O_constant) |
| 2058 | extended |= ((op1.exp.X_add_number >> 16) & 0xf) << 7; |
| 2059 | |
| 2060 | else if (op1.reg || (op1.reg == 0 && op1.am == 3)) /* Not PC relative. */ |
| 2061 | fix_new_exp (frag_now, where, 6, &(op1.exp), FALSE, |
| 2062 | BFD_RELOC_MSP430X_ABS20_EXT_SRC); |
| 2063 | else |
| 2064 | fix_new_exp (frag_now, where, 6, &(op1.exp), FALSE, |
| 2065 | BFD_RELOC_MSP430X_PCR20_EXT_SRC); |
| 2066 | } |
| 2067 | |
| 2068 | /* Emit the extension word. */ |
| 2069 | bfd_putl16 (extended, frag); |
| 2070 | frag += 2; |
| 2071 | where += 2; |
| 2072 | } |
| 2073 | |
| 2074 | bfd_putl16 ((bfd_vma) bin, frag); |
| 2075 | frag += 2; |
| 2076 | where += 2; |
| 2077 | |
| 2078 | if (op1.mode == OP_EXP) |
| 2079 | { |
| 2080 | if (op1.exp.X_op == O_constant) |
| 2081 | { |
| 2082 | bfd_putl16 (op1.exp.X_add_number & 0xffff, frag); |
| 2083 | } |
| 2084 | else |
| 2085 | { |
| 2086 | bfd_putl16 ((bfd_vma) ZEROS, frag); |
| 2087 | |
| 2088 | if (!extended_op) |
| 2089 | { |
| 2090 | if (op1.reg) |
| 2091 | fix_new_exp (frag_now, where, 2, |
| 2092 | &(op1.exp), FALSE, CHECK_RELOC_MSP430 (op1)); |
| 2093 | else |
| 2094 | fix_new_exp (frag_now, where, 2, |
| 2095 | &(op1.exp), TRUE, CHECK_RELOC_MSP430_PCREL); |
| 2096 | } |
| 2097 | } |
| 2098 | } |
| 2099 | |
| 2100 | dwarf2_emit_insn (insn_length); |
| 2101 | break; |
| 2102 | |
| 2103 | case 2: |
| 2104 | /* Shift instruction. */ |
| 2105 | line = extract_operand (line, l1, sizeof (l1)); |
| 2106 | strncpy (l2, l1, sizeof (l2)); |
| 2107 | l2[sizeof (l2) - 1] = '\0'; |
| 2108 | res = msp430_srcoperand (&op1, l1, opcode->bin_opcode, &imm_op, extended_op, TRUE); |
| 2109 | res += msp430_dstoperand (&op2, l2, opcode->bin_opcode, extended_op, TRUE); |
| 2110 | |
| 2111 | if (res) |
| 2112 | break; /* An error occurred. All warnings were done before. */ |
| 2113 | |
| 2114 | insn_length = (extended_op ? 2 : 0) + 2 + (op1.ol * 2) + (op2.ol * 2); |
| 2115 | frag = frag_more (insn_length); |
| 2116 | where = frag - frag_now->fr_literal; |
| 2117 | |
| 2118 | if (target_is_430xv2 () |
| 2119 | && op1.mode == OP_REG |
| 2120 | && op1.reg == 0 |
| 2121 | && (is_opcode ("rlax") |
| 2122 | || is_opcode ("rlcx") |
| 2123 | || is_opcode ("rla") |
| 2124 | || is_opcode ("rlc"))) |
| 2125 | { |
| 2126 | as_bad (_("%s: attempt to rotate the PC register"), opcode->name); |
| 2127 | break; |
| 2128 | } |
| 2129 | |
| 2130 | if (extended_op) |
| 2131 | { |
| 2132 | if (!addr_op) |
| 2133 | extended |= BYTE_OPERATION; |
| 2134 | |
| 2135 | if ((op1.ol != 0 || op2.ol != 0) && ((extended & 0xf) != 0)) |
| 2136 | { |
| 2137 | as_bad (_("repeat instruction used with non-register mode instruction")); |
| 2138 | extended &= ~ 0xf; |
| 2139 | } |
| 2140 | |
| 2141 | if (op1.mode == OP_EXP) |
| 2142 | { |
| 2143 | if (op1.exp.X_op == O_constant) |
| 2144 | extended |= ((op1.exp.X_add_number >> 16) & 0xf) << 7; |
| 2145 | |
| 2146 | else if (op1.reg || (op1.reg == 0 && op1.am == 3)) /* Not PC relative. */ |
| 2147 | fix_new_exp (frag_now, where, 6, &(op1.exp), FALSE, |
| 2148 | BFD_RELOC_MSP430X_ABS20_EXT_SRC); |
| 2149 | else |
| 2150 | fix_new_exp (frag_now, where, 6, &(op1.exp), FALSE, |
| 2151 | BFD_RELOC_MSP430X_PCR20_EXT_SRC); |
| 2152 | } |
| 2153 | |
| 2154 | if (op2.mode == OP_EXP) |
| 2155 | { |
| 2156 | if (op2.exp.X_op == O_constant) |
| 2157 | extended |= (op2.exp.X_add_number >> 16) & 0xf; |
| 2158 | |
| 2159 | else if (op1.mode == OP_EXP) |
| 2160 | fix_new_exp (frag_now, where, 8, &(op2.exp), FALSE, |
| 2161 | op2.reg ? BFD_RELOC_MSP430X_ABS20_EXT_ODST |
| 2162 | : BFD_RELOC_MSP430X_PCR20_EXT_ODST); |
| 2163 | else |
| 2164 | fix_new_exp (frag_now, where, 6, &(op2.exp), FALSE, |
| 2165 | op2.reg ? BFD_RELOC_MSP430X_ABS20_EXT_DST |
| 2166 | : BFD_RELOC_MSP430X_PCR20_EXT_DST); |
| 2167 | } |
| 2168 | |
| 2169 | /* Emit the extension word. */ |
| 2170 | bfd_putl16 (extended, frag); |
| 2171 | frag += 2; |
| 2172 | where += 2; |
| 2173 | } |
| 2174 | |
| 2175 | bin |= (op2.reg | (op1.reg << 8) | (op1.am << 4) | (op2.am << 7)); |
| 2176 | bfd_putl16 ((bfd_vma) bin, frag); |
| 2177 | frag += 2; |
| 2178 | where += 2; |
| 2179 | |
| 2180 | if (op1.mode == OP_EXP) |
| 2181 | { |
| 2182 | if (op1.exp.X_op == O_constant) |
| 2183 | { |
| 2184 | bfd_putl16 (op1.exp.X_add_number & 0xffff, frag); |
| 2185 | } |
| 2186 | else |
| 2187 | { |
| 2188 | bfd_putl16 ((bfd_vma) ZEROS, frag); |
| 2189 | |
| 2190 | if (!extended_op) |
| 2191 | { |
| 2192 | if (op1.reg || (op1.reg == 0 && op1.am == 3)) /* Not PC relative. */ |
| 2193 | fix_new_exp (frag_now, where, 2, |
| 2194 | &(op1.exp), FALSE, CHECK_RELOC_MSP430 (op1)); |
| 2195 | else |
| 2196 | fix_new_exp (frag_now, where, 2, |
| 2197 | &(op1.exp), TRUE, CHECK_RELOC_MSP430_PCREL); |
| 2198 | } |
| 2199 | } |
| 2200 | frag += 2; |
| 2201 | where += 2; |
| 2202 | } |
| 2203 | |
| 2204 | if (op2.mode == OP_EXP) |
| 2205 | { |
| 2206 | if (op2.exp.X_op == O_constant) |
| 2207 | { |
| 2208 | bfd_putl16 (op2.exp.X_add_number & 0xffff, frag); |
| 2209 | } |
| 2210 | else |
| 2211 | { |
| 2212 | bfd_putl16 ((bfd_vma) ZEROS, frag); |
| 2213 | |
| 2214 | if (!extended_op) |
| 2215 | { |
| 2216 | if (op2.reg) /* Not PC relative. */ |
| 2217 | fix_new_exp (frag_now, where, 2, |
| 2218 | &(op2.exp), FALSE, CHECK_RELOC_MSP430 (op2)); |
| 2219 | else |
| 2220 | fix_new_exp (frag_now, where, 2, |
| 2221 | &(op2.exp), TRUE, CHECK_RELOC_MSP430_PCREL); |
| 2222 | } |
| 2223 | } |
| 2224 | } |
| 2225 | |
| 2226 | dwarf2_emit_insn (insn_length); |
| 2227 | break; |
| 2228 | |
| 2229 | case 3: |
| 2230 | /* Branch instruction => mov dst, r0. */ |
| 2231 | if (extended_op) |
| 2232 | { |
| 2233 | as_bad ("Internal error: state 0/3 not coded for extended instructions"); |
| 2234 | break; |
| 2235 | } |
| 2236 | |
| 2237 | line = extract_operand (line, l1, sizeof (l1)); |
| 2238 | res = msp430_srcoperand (&op1, l1, opcode->bin_opcode, &imm_op, extended_op, FALSE); |
| 2239 | if (res) |
| 2240 | break; |
| 2241 | |
| 2242 | byte_op = FALSE; |
| 2243 | imm_op = FALSE; |
| 2244 | bin |= ((op1.reg << 8) | (op1.am << 4)); |
| 2245 | op_length = 2 + 2 * op1.ol; |
| 2246 | frag = frag_more (op_length); |
| 2247 | where = frag - frag_now->fr_literal; |
| 2248 | bfd_putl16 ((bfd_vma) bin, frag); |
| 2249 | |
| 2250 | if (op1.mode == OP_EXP) |
| 2251 | { |
| 2252 | if (op1.exp.X_op == O_constant) |
| 2253 | { |
| 2254 | bfd_putl16 (op1.exp.X_add_number & 0xffff, frag + 2); |
| 2255 | } |
| 2256 | else |
| 2257 | { |
| 2258 | where += 2; |
| 2259 | |
| 2260 | bfd_putl16 ((bfd_vma) ZEROS, frag + 2); |
| 2261 | |
| 2262 | if (op1.reg || (op1.reg == 0 && op1.am == 3)) |
| 2263 | fix_new_exp (frag_now, where, 2, |
| 2264 | &(op1.exp), FALSE, CHECK_RELOC_MSP430 (op1)); |
| 2265 | else |
| 2266 | fix_new_exp (frag_now, where, 2, |
| 2267 | &(op1.exp), TRUE, CHECK_RELOC_MSP430_PCREL); |
| 2268 | } |
| 2269 | } |
| 2270 | |
| 2271 | dwarf2_emit_insn (insn_length + op_length); |
| 2272 | break; |
| 2273 | |
| 2274 | case 4: |
| 2275 | /* CALLA instructions. */ |
| 2276 | fix_emitted = FALSE; |
| 2277 | |
| 2278 | line = extract_operand (line, l1, sizeof (l1)); |
| 2279 | imm_op = FALSE; |
| 2280 | |
| 2281 | res = msp430_srcoperand (&op1, l1, opcode->bin_opcode, &imm_op, |
| 2282 | extended_op, FALSE); |
| 2283 | if (res) |
| 2284 | break; |
| 2285 | |
| 2286 | byte_op = FALSE; |
| 2287 | |
| 2288 | op_length = 2 + 2 * op1.ol; |
| 2289 | frag = frag_more (op_length); |
| 2290 | where = frag - frag_now->fr_literal; |
| 2291 | |
| 2292 | if (imm_op) |
| 2293 | { |
| 2294 | if (op1.am == 3) |
| 2295 | { |
| 2296 | bin |= 0xb0; |
| 2297 | |
| 2298 | fix_new_exp (frag_now, where, 4, &(op1.exp), FALSE, |
| 2299 | BFD_RELOC_MSP430X_ABS20_ADR_DST); |
| 2300 | fix_emitted = TRUE; |
| 2301 | } |
| 2302 | else if (op1.am == 1) |
| 2303 | { |
| 2304 | if (op1.reg == 0) |
| 2305 | { |
| 2306 | bin |= 0x90; |
| 2307 | |
| 2308 | fix_new_exp (frag_now, where, 4, &(op1.exp), FALSE, |
| 2309 | BFD_RELOC_MSP430X_PCR20_CALL); |
| 2310 | fix_emitted = TRUE; |
| 2311 | } |
| 2312 | else |
| 2313 | bin |= 0x50 | op1.reg; |
| 2314 | } |
| 2315 | else if (op1.am == 0) |
| 2316 | bin |= 0x40 | op1.reg; |
| 2317 | } |
| 2318 | else if (op1.am == 1) |
| 2319 | { |
| 2320 | bin |= 0x80; |
| 2321 | |
| 2322 | fix_new_exp (frag_now, where, 4, &(op1.exp), FALSE, |
| 2323 | BFD_RELOC_MSP430X_ABS20_ADR_DST); |
| 2324 | fix_emitted = TRUE; |
| 2325 | } |
| 2326 | else if (op1.am == 2) |
| 2327 | bin |= 0x60 | op1.reg; |
| 2328 | else if (op1.am == 3) |
| 2329 | bin |= 0x70 | op1.reg; |
| 2330 | |
| 2331 | bfd_putl16 ((bfd_vma) bin, frag); |
| 2332 | |
| 2333 | if (op1.mode == OP_EXP) |
| 2334 | { |
| 2335 | if (op1.ol != 1) |
| 2336 | { |
| 2337 | as_bad ("Internal error: unexpected CALLA instruction length: %d\n", op1.ol); |
| 2338 | break; |
| 2339 | } |
| 2340 | |
| 2341 | bfd_putl16 ((bfd_vma) ZEROS, frag + 2); |
| 2342 | |
| 2343 | if (! fix_emitted) |
| 2344 | fix_new_exp (frag_now, where + 2, 2, |
| 2345 | &(op1.exp), FALSE, BFD_RELOC_16); |
| 2346 | } |
| 2347 | |
| 2348 | dwarf2_emit_insn (insn_length + op_length); |
| 2349 | break; |
| 2350 | |
| 2351 | case 5: |
| 2352 | { |
| 2353 | int n; |
| 2354 | int reg; |
| 2355 | |
| 2356 | /* [POP|PUSH]M[.A] #N, Rd */ |
| 2357 | line = extract_operand (line, l1, sizeof (l1)); |
| 2358 | line = extract_operand (line, l2, sizeof (l2)); |
| 2359 | |
| 2360 | if (*l1 != '#') |
| 2361 | { |
| 2362 | as_bad (_("expected #n as first argument of %s"), opcode->name); |
| 2363 | break; |
| 2364 | } |
| 2365 | parse_exp (l1 + 1, &(op1.exp)); |
| 2366 | if (op1.exp.X_op != O_constant) |
| 2367 | { |
| 2368 | as_bad (_("expected constant expression for first argument of %s"), |
| 2369 | opcode->name); |
| 2370 | break; |
| 2371 | } |
| 2372 | |
| 2373 | if ((reg = check_reg (l2)) == -1) |
| 2374 | { |
| 2375 | as_bad (_("expected register as second argument of %s"), |
| 2376 | opcode->name); |
| 2377 | break; |
| 2378 | } |
| 2379 | |
| 2380 | op_length = 2; |
| 2381 | frag = frag_more (op_length); |
| 2382 | where = frag - frag_now->fr_literal; |
| 2383 | bin = opcode->bin_opcode; |
| 2384 | if (! addr_op) |
| 2385 | bin |= 0x100; |
| 2386 | n = op1.exp.X_add_number; |
| 2387 | bin |= (n - 1) << 4; |
| 2388 | if (is_opcode ("pushm")) |
| 2389 | bin |= reg; |
| 2390 | else |
| 2391 | { |
| 2392 | if (reg - n + 1 < 0) |
| 2393 | { |
| 2394 | as_bad (_("Too many registers popped")); |
| 2395 | break; |
| 2396 | } |
| 2397 | |
| 2398 | /* CPU21 errata: cannot use POPM to restore the SR register. */ |
| 2399 | if (target_is_430xv2 () |
| 2400 | && (reg - n + 1 < 3) |
| 2401 | && reg >= 2 |
| 2402 | && is_opcode ("popm")) |
| 2403 | { |
| 2404 | as_bad (_("Cannot use POPM to restore the SR register")); |
| 2405 | break; |
| 2406 | } |
| 2407 | |
| 2408 | bin |= (reg - n + 1); |
| 2409 | } |
| 2410 | |
| 2411 | bfd_putl16 ((bfd_vma) bin, frag); |
| 2412 | dwarf2_emit_insn (op_length); |
| 2413 | break; |
| 2414 | } |
| 2415 | |
| 2416 | case 6: |
| 2417 | { |
| 2418 | int n; |
| 2419 | int reg; |
| 2420 | |
| 2421 | /* Bit rotation instructions. RRCM, RRAM, RRUM, RLAM. */ |
| 2422 | if (extended & 0xff) |
| 2423 | { |
| 2424 | as_bad (_("repeat count cannot be used with %s"), opcode->name); |
| 2425 | break; |
| 2426 | } |
| 2427 | |
| 2428 | line = extract_operand (line, l1, sizeof (l1)); |
| 2429 | line = extract_operand (line, l2, sizeof (l2)); |
| 2430 | |
| 2431 | if (*l1 != '#') |
| 2432 | { |
| 2433 | as_bad (_("expected #n as first argument of %s"), opcode->name); |
| 2434 | break; |
| 2435 | } |
| 2436 | parse_exp (l1 + 1, &(op1.exp)); |
| 2437 | if (op1.exp.X_op != O_constant) |
| 2438 | { |
| 2439 | as_bad (_("expected constant expression for first argument of %s"), |
| 2440 | opcode->name); |
| 2441 | break; |
| 2442 | } |
| 2443 | n = op1.exp.X_add_number; |
| 2444 | if (n > 4 || n < 1) |
| 2445 | { |
| 2446 | as_bad (_("expected first argument of %s to be in the range 1-4"), |
| 2447 | opcode->name); |
| 2448 | break; |
| 2449 | } |
| 2450 | |
| 2451 | if ((reg = check_reg (l2)) == -1) |
| 2452 | { |
| 2453 | as_bad (_("expected register as second argument of %s"), |
| 2454 | opcode->name); |
| 2455 | break; |
| 2456 | } |
| 2457 | |
| 2458 | if (target_is_430xv2 () && reg == 0) |
| 2459 | { |
| 2460 | as_bad (_("%s: attempt to rotate the PC register"), opcode->name); |
| 2461 | break; |
| 2462 | } |
| 2463 | |
| 2464 | op_length = 2; |
| 2465 | frag = frag_more (op_length); |
| 2466 | where = frag - frag_now->fr_literal; |
| 2467 | |
| 2468 | bin = opcode->bin_opcode; |
| 2469 | if (! addr_op) |
| 2470 | bin |= 0x10; |
| 2471 | bin |= (n - 1) << 10; |
| 2472 | bin |= reg; |
| 2473 | |
| 2474 | bfd_putl16 ((bfd_vma) bin, frag); |
| 2475 | dwarf2_emit_insn (op_length); |
| 2476 | break; |
| 2477 | } |
| 2478 | |
| 2479 | case 7: |
| 2480 | { |
| 2481 | int reg; |
| 2482 | |
| 2483 | /* RRUX: Synthetic unsigned right shift of a register by one bit. */ |
| 2484 | if (extended & 0xff) |
| 2485 | { |
| 2486 | as_bad (_("repeat count cannot be used with %s"), opcode->name); |
| 2487 | break; |
| 2488 | } |
| 2489 | |
| 2490 | line = extract_operand (line, l1, sizeof (l1)); |
| 2491 | if ((reg = check_reg (l1)) == -1) |
| 2492 | { |
| 2493 | as_bad (_("expected register as argument of %s"), |
| 2494 | opcode->name); |
| 2495 | break; |
| 2496 | } |
| 2497 | |
| 2498 | if (target_is_430xv2 () && reg == 0) |
| 2499 | { |
| 2500 | as_bad (_("%s: attempt to rotate the PC register"), opcode->name); |
| 2501 | break; |
| 2502 | } |
| 2503 | |
| 2504 | if (byte_op) |
| 2505 | { |
| 2506 | /* Tricky - there is no single instruction that will do this. |
| 2507 | Encode as: RRA.B rN { BIC.B #0x80, rN */ |
| 2508 | op_length = 6; |
| 2509 | frag = frag_more (op_length); |
| 2510 | where = frag - frag_now->fr_literal; |
| 2511 | bin = 0x1140 | reg; |
| 2512 | bfd_putl16 ((bfd_vma) bin, frag); |
| 2513 | dwarf2_emit_insn (2); |
| 2514 | bin = 0xc070 | reg; |
| 2515 | bfd_putl16 ((bfd_vma) bin, frag + 2); |
| 2516 | bin = 0x0080; |
| 2517 | bfd_putl16 ((bfd_vma) bin, frag + 4); |
| 2518 | dwarf2_emit_insn (4); |
| 2519 | } |
| 2520 | else |
| 2521 | { |
| 2522 | /* Encode as RRUM[.A] rN. */ |
| 2523 | bin = opcode->bin_opcode; |
| 2524 | if (! addr_op) |
| 2525 | bin |= 0x10; |
| 2526 | bin |= reg; |
| 2527 | op_length = 2; |
| 2528 | frag = frag_more (op_length); |
| 2529 | where = frag - frag_now->fr_literal; |
| 2530 | bfd_putl16 ((bfd_vma) bin, frag); |
| 2531 | dwarf2_emit_insn (op_length); |
| 2532 | } |
| 2533 | break; |
| 2534 | } |
| 2535 | |
| 2536 | case 8: |
| 2537 | { |
| 2538 | bfd_boolean need_reloc = FALSE; |
| 2539 | int n; |
| 2540 | int reg; |
| 2541 | |
| 2542 | /* ADDA, CMPA and SUBA address instructions. */ |
| 2543 | if (extended & 0xff) |
| 2544 | { |
| 2545 | as_bad (_("repeat count cannot be used with %s"), opcode->name); |
| 2546 | break; |
| 2547 | } |
| 2548 | |
| 2549 | line = extract_operand (line, l1, sizeof (l1)); |
| 2550 | line = extract_operand (line, l2, sizeof (l2)); |
| 2551 | |
| 2552 | bin = opcode->bin_opcode; |
| 2553 | |
| 2554 | if (*l1 == '#') |
| 2555 | { |
| 2556 | parse_exp (l1 + 1, &(op1.exp)); |
| 2557 | |
| 2558 | if (op1.exp.X_op == O_constant) |
| 2559 | { |
| 2560 | n = op1.exp.X_add_number; |
| 2561 | if (n > 0xfffff || n < - (0x7ffff)) |
| 2562 | { |
| 2563 | as_bad (_("expected value of first argument of %s to fit into 20-bits"), |
| 2564 | opcode->name); |
| 2565 | break; |
| 2566 | } |
| 2567 | |
| 2568 | bin |= ((n >> 16) & 0xf) << 8; |
| 2569 | } |
| 2570 | else |
| 2571 | { |
| 2572 | n = 0; |
| 2573 | need_reloc = TRUE; |
| 2574 | } |
| 2575 | |
| 2576 | op_length = 4; |
| 2577 | } |
| 2578 | else |
| 2579 | { |
| 2580 | if ((n = check_reg (l1)) == -1) |
| 2581 | { |
| 2582 | as_bad (_("expected register name or constant as first argument of %s"), |
| 2583 | opcode->name); |
| 2584 | break; |
| 2585 | } |
| 2586 | |
| 2587 | bin |= (n << 8) | (1 << 6); |
| 2588 | op_length = 2; |
| 2589 | } |
| 2590 | |
| 2591 | if ((reg = check_reg (l2)) == -1) |
| 2592 | { |
| 2593 | as_bad (_("expected register as second argument of %s"), |
| 2594 | opcode->name); |
| 2595 | break; |
| 2596 | } |
| 2597 | |
| 2598 | frag = frag_more (op_length); |
| 2599 | where = frag - frag_now->fr_literal; |
| 2600 | bin |= reg; |
| 2601 | if (need_reloc) |
| 2602 | fix_new_exp (frag_now, where, 4, &(op1.exp), FALSE, |
| 2603 | BFD_RELOC_MSP430X_ABS20_ADR_SRC); |
| 2604 | |
| 2605 | bfd_putl16 ((bfd_vma) bin, frag); |
| 2606 | if (op_length == 4) |
| 2607 | bfd_putl16 ((bfd_vma) (n & 0xffff), frag + 2); |
| 2608 | dwarf2_emit_insn (op_length); |
| 2609 | break; |
| 2610 | } |
| 2611 | |
| 2612 | case 9: /* MOVA, BRA, RETA. */ |
| 2613 | imm_op = FALSE; |
| 2614 | bin = opcode->bin_opcode; |
| 2615 | |
| 2616 | if (is_opcode ("reta")) |
| 2617 | { |
| 2618 | /* The RETA instruction does not take any arguments. |
| 2619 | The implicit first argument is @SP+. |
| 2620 | The implicit second argument is PC. */ |
| 2621 | op1.mode = OP_REG; |
| 2622 | op1.am = 3; |
| 2623 | op1.reg = 1; |
| 2624 | |
| 2625 | op2.mode = OP_REG; |
| 2626 | op2.reg = 0; |
| 2627 | } |
| 2628 | else |
| 2629 | { |
| 2630 | line = extract_operand (line, l1, sizeof (l1)); |
| 2631 | res = msp430_srcoperand (&op1, l1, opcode->bin_opcode, |
| 2632 | &imm_op, extended_op, FALSE); |
| 2633 | |
| 2634 | if (is_opcode ("bra")) |
| 2635 | { |
| 2636 | /* This is the BRA synthetic instruction. |
| 2637 | The second argument is always PC. */ |
| 2638 | op2.mode = OP_REG; |
| 2639 | op2.reg = 0; |
| 2640 | } |
| 2641 | else |
| 2642 | { |
| 2643 | line = extract_operand (line, l2, sizeof (l2)); |
| 2644 | res += msp430_dstoperand (&op2, l2, opcode->bin_opcode, |
| 2645 | extended_op, TRUE); |
| 2646 | } |
| 2647 | |
| 2648 | if (res) |
| 2649 | break; /* Error occurred. All warnings were done before. */ |
| 2650 | } |
| 2651 | |
| 2652 | /* Only a restricted subset of the normal MSP430 addressing modes |
| 2653 | are supported here, so check for the ones that are allowed. */ |
| 2654 | if ((op_length = try_encode_mova (imm_op, bin, & op1, & op2, |
| 2655 | & error_message)) == 0) |
| 2656 | { |
| 2657 | as_bad (error_message, opcode->name); |
| 2658 | break; |
| 2659 | } |
| 2660 | dwarf2_emit_insn (op_length); |
| 2661 | break; |
| 2662 | |
| 2663 | case 10: /* RPT */ |
| 2664 | line = extract_operand (line, l1, sizeof l1); |
| 2665 | /* The RPT instruction only accepted immediates and registers. */ |
| 2666 | if (*l1 == '#') |
| 2667 | { |
| 2668 | parse_exp (l1 + 1, &(op1.exp)); |
| 2669 | if (op1.exp.X_op != O_constant) |
| 2670 | { |
| 2671 | as_bad (_("expected constant value as argument to RPT")); |
| 2672 | break; |
| 2673 | } |
| 2674 | if (op1.exp.X_add_number < 1 |
| 2675 | || op1.exp.X_add_number > (1 << 4)) |
| 2676 | { |
| 2677 | as_bad (_("expected constant in the range 2..16")); |
| 2678 | break; |
| 2679 | } |
| 2680 | |
| 2681 | /* We silently accept and ignore a repeat count of 1. */ |
| 2682 | if (op1.exp.X_add_number > 1) |
| 2683 | repeat_count = op1.exp.X_add_number; |
| 2684 | } |
| 2685 | else |
| 2686 | { |
| 2687 | int reg; |
| 2688 | |
| 2689 | if ((reg = check_reg (l1)) != -1) |
| 2690 | { |
| 2691 | if (reg == 0) |
| 2692 | as_warn (_("PC used as an argument to RPT")); |
| 2693 | else |
| 2694 | repeat_count = - reg; |
| 2695 | } |
| 2696 | else |
| 2697 | { |
| 2698 | as_bad (_("expected constant or register name as argument to RPT insn")); |
| 2699 | break; |
| 2700 | } |
| 2701 | } |
| 2702 | break; |
| 2703 | |
| 2704 | default: |
| 2705 | as_bad (_("Illegal emulated instruction ")); |
| 2706 | break; |
| 2707 | } |
| 2708 | break; |
| 2709 | |
| 2710 | case 1: /* Format 1, double operand. */ |
| 2711 | line = extract_operand (line, l1, sizeof (l1)); |
| 2712 | line = extract_operand (line, l2, sizeof (l2)); |
| 2713 | res = msp430_srcoperand (&op1, l1, opcode->bin_opcode, &imm_op, extended_op, TRUE); |
| 2714 | res += msp430_dstoperand (&op2, l2, opcode->bin_opcode, extended_op, TRUE); |
| 2715 | |
| 2716 | if (res) |
| 2717 | break; /* Error occurred. All warnings were done before. */ |
| 2718 | |
| 2719 | if (extended_op |
| 2720 | && is_opcode ("movx") |
| 2721 | && addr_op |
| 2722 | && msp430_enable_relax) |
| 2723 | { |
| 2724 | /* This is the MOVX.A instruction. See if we can convert |
| 2725 | it into the MOVA instruction instead. This saves 2 bytes. */ |
| 2726 | if ((op_length = try_encode_mova (imm_op, 0x0000, & op1, & op2, |
| 2727 | NULL)) != 0) |
| 2728 | { |
| 2729 | dwarf2_emit_insn (op_length); |
| 2730 | break; |
| 2731 | } |
| 2732 | } |
| 2733 | |
| 2734 | bin |= (op2.reg | (op1.reg << 8) | (op1.am << 4) | (op2.am << 7)); |
| 2735 | |
| 2736 | if ( (is_opcode ("bic") && bin == 0xc232) |
| 2737 | || (is_opcode ("bis") && bin == 0xd232) |
| 2738 | || (is_opcode ("mov") && op2.mode == OP_REG && op2.reg == 2)) |
| 2739 | { |
| 2740 | if (check_for_nop) |
| 2741 | { |
| 2742 | if (warn_interrupt_nops) |
| 2743 | { |
| 2744 | if (gen_interrupt_nops) |
| 2745 | as_warn (_("NOP inserted between two instructions that change interrupt state")); |
| 2746 | else |
| 2747 | as_warn (_("a NOP might be needed here because of successive changes in interrupt state")); |
| 2748 | } |
| 2749 | |
| 2750 | if (gen_interrupt_nops) |
| 2751 | { |
| 2752 | /* Emit a NOP between interrupt enable/disable. |
| 2753 | See 1.3.4.1 of the MSP430x5xx User Guide. */ |
| 2754 | insn_length += 2; |
| 2755 | frag = frag_more (2); |
| 2756 | bfd_putl16 ((bfd_vma) 0x4303 /* NOP */, frag); |
| 2757 | } |
| 2758 | } |
| 2759 | |
| 2760 | nop_check_needed = TRUE; |
| 2761 | } |
| 2762 | |
| 2763 | /* Compute the entire length of the instruction in bytes. */ |
| 2764 | op_length = (extended_op ? 2 : 0) /* The extension word. */ |
| 2765 | + 2 /* The opcode */ |
| 2766 | + (2 * op1.ol) /* The first operand. */ |
| 2767 | + (2 * op2.ol); /* The second operand. */ |
| 2768 | |
| 2769 | insn_length += op_length; |
| 2770 | frag = frag_more (op_length); |
| 2771 | where = frag - frag_now->fr_literal; |
| 2772 | |
| 2773 | if (extended_op) |
| 2774 | { |
| 2775 | if (!addr_op) |
| 2776 | extended |= BYTE_OPERATION; |
| 2777 | |
| 2778 | if ((op1.ol != 0 || op2.ol != 0) && ((extended & 0xf) != 0)) |
| 2779 | { |
| 2780 | as_bad (_("repeat instruction used with non-register mode instruction")); |
| 2781 | extended &= ~ 0xf; |
| 2782 | } |
| 2783 | |
| 2784 | /* If necessary, emit a reloc to update the extension word. */ |
| 2785 | if (op1.mode == OP_EXP) |
| 2786 | { |
| 2787 | if (op1.exp.X_op == O_constant) |
| 2788 | extended |= ((op1.exp.X_add_number >> 16) & 0xf) << 7; |
| 2789 | |
| 2790 | else if (op1.reg || (op1.reg == 0 && op1.am == 3)) /* Not PC relative. */ |
| 2791 | fix_new_exp (frag_now, where, 6, &(op1.exp), FALSE, |
| 2792 | BFD_RELOC_MSP430X_ABS20_EXT_SRC); |
| 2793 | else |
| 2794 | fix_new_exp (frag_now, where, 6, &(op1.exp), FALSE, |
| 2795 | BFD_RELOC_MSP430X_PCR20_EXT_SRC); |
| 2796 | } |
| 2797 | |
| 2798 | if (op2.mode == OP_EXP) |
| 2799 | { |
| 2800 | if (op2.exp.X_op == O_constant) |
| 2801 | extended |= (op2.exp.X_add_number >> 16) & 0xf; |
| 2802 | |
| 2803 | else if (op1.mode == OP_EXP) |
| 2804 | fix_new_exp (frag_now, where, 8, &(op2.exp), FALSE, |
| 2805 | op2.reg ? BFD_RELOC_MSP430X_ABS20_EXT_ODST |
| 2806 | : BFD_RELOC_MSP430X_PCR20_EXT_ODST); |
| 2807 | |
| 2808 | else |
| 2809 | fix_new_exp (frag_now, where, 6, &(op2.exp), FALSE, |
| 2810 | op2.reg ? BFD_RELOC_MSP430X_ABS20_EXT_DST |
| 2811 | : BFD_RELOC_MSP430X_PCR20_EXT_DST); |
| 2812 | } |
| 2813 | |
| 2814 | /* Emit the extension word. */ |
| 2815 | bfd_putl16 (extended, frag); |
| 2816 | where += 2; |
| 2817 | frag += 2; |
| 2818 | } |
| 2819 | |
| 2820 | bfd_putl16 ((bfd_vma) bin, frag); |
| 2821 | where += 2; |
| 2822 | frag += 2; |
| 2823 | |
| 2824 | if (op1.mode == OP_EXP) |
| 2825 | { |
| 2826 | if (op1.exp.X_op == O_constant) |
| 2827 | { |
| 2828 | bfd_putl16 (op1.exp.X_add_number & 0xffff, frag); |
| 2829 | } |
| 2830 | else |
| 2831 | { |
| 2832 | bfd_putl16 ((bfd_vma) ZEROS, frag); |
| 2833 | |
| 2834 | if (!extended_op) |
| 2835 | { |
| 2836 | if (op1.reg || (op1.reg == 0 && op1.am == 3)) /* Not PC relative. */ |
| 2837 | fix_new_exp (frag_now, where, 2, |
| 2838 | &(op1.exp), FALSE, CHECK_RELOC_MSP430 (op1)); |
| 2839 | else |
| 2840 | fix_new_exp (frag_now, where, 2, |
| 2841 | &(op1.exp), TRUE, CHECK_RELOC_MSP430_PCREL); |
| 2842 | } |
| 2843 | } |
| 2844 | |
| 2845 | where += 2; |
| 2846 | frag += 2; |
| 2847 | } |
| 2848 | |
| 2849 | if (op2.mode == OP_EXP) |
| 2850 | { |
| 2851 | if (op2.exp.X_op == O_constant) |
| 2852 | { |
| 2853 | bfd_putl16 (op2.exp.X_add_number & 0xffff, frag); |
| 2854 | } |
| 2855 | else |
| 2856 | { |
| 2857 | bfd_putl16 ((bfd_vma) ZEROS, frag); |
| 2858 | |
| 2859 | if (!extended_op) |
| 2860 | { |
| 2861 | if (op2.reg) /* Not PC relative. */ |
| 2862 | fix_new_exp (frag_now, where, 2, |
| 2863 | &(op2.exp), FALSE, CHECK_RELOC_MSP430 (op2)); |
| 2864 | else |
| 2865 | fix_new_exp (frag_now, where, 2, |
| 2866 | &(op2.exp), TRUE, CHECK_RELOC_MSP430_PCREL); |
| 2867 | } |
| 2868 | } |
| 2869 | } |
| 2870 | |
| 2871 | dwarf2_emit_insn (insn_length); |
| 2872 | break; |
| 2873 | |
| 2874 | case 2: /* Single-operand mostly instr. */ |
| 2875 | if (opcode->insn_opnumb == 0) |
| 2876 | { |
| 2877 | /* reti instruction. */ |
| 2878 | insn_length += 2; |
| 2879 | frag = frag_more (2); |
| 2880 | bfd_putl16 ((bfd_vma) bin, frag); |
| 2881 | dwarf2_emit_insn (insn_length); |
| 2882 | break; |
| 2883 | } |
| 2884 | |
| 2885 | line = extract_operand (line, l1, sizeof (l1)); |
| 2886 | res = msp430_srcoperand (&op1, l1, opcode->bin_opcode, |
| 2887 | &imm_op, extended_op, TRUE); |
| 2888 | if (res) |
| 2889 | break; /* Error in operand. */ |
| 2890 | |
| 2891 | if (target_is_430xv2 () |
| 2892 | && op1.mode == OP_REG |
| 2893 | && op1.reg == 0 |
| 2894 | && (is_opcode ("rrax") |
| 2895 | || is_opcode ("rrcx") |
| 2896 | || is_opcode ("rra") |
| 2897 | || is_opcode ("rrc"))) |
| 2898 | { |
| 2899 | as_bad (_("%s: attempt to rotate the PC register"), opcode->name); |
| 2900 | break; |
| 2901 | } |
| 2902 | |
| 2903 | insn_length = (extended_op ? 2 : 0) + 2 + (op1.ol * 2); |
| 2904 | frag = frag_more (insn_length); |
| 2905 | where = frag - frag_now->fr_literal; |
| 2906 | |
| 2907 | if (extended_op) |
| 2908 | { |
| 2909 | if (is_opcode ("swpbx") || is_opcode ("sxtx")) |
| 2910 | { |
| 2911 | /* These two instructions use a special |
| 2912 | encoding of the A/L and B/W bits. */ |
| 2913 | bin &= ~ BYTE_OPERATION; |
| 2914 | |
| 2915 | if (byte_op) |
| 2916 | { |
| 2917 | as_bad (_("%s instruction does not accept a .b suffix"), |
| 2918 | opcode->name); |
| 2919 | break; |
| 2920 | } |
| 2921 | else if (! addr_op) |
| 2922 | extended |= BYTE_OPERATION; |
| 2923 | } |
| 2924 | else if (! addr_op) |
| 2925 | extended |= BYTE_OPERATION; |
| 2926 | |
| 2927 | if (op1.ol != 0 && ((extended & 0xf) != 0)) |
| 2928 | { |
| 2929 | as_bad (_("repeat instruction used with non-register mode instruction")); |
| 2930 | extended &= ~ 0xf; |
| 2931 | } |
| 2932 | |
| 2933 | if (op1.mode == OP_EXP) |
| 2934 | { |
| 2935 | if (op1.exp.X_op == O_constant) |
| 2936 | extended |= ((op1.exp.X_add_number >> 16) & 0xf) << 7; |
| 2937 | |
| 2938 | else if (op1.reg || (op1.reg == 0 && op1.am == 3)) /* Not PC relative. */ |
| 2939 | fix_new_exp (frag_now, where, 6, &(op1.exp), FALSE, |
| 2940 | BFD_RELOC_MSP430X_ABS20_EXT_SRC); |
| 2941 | else |
| 2942 | fix_new_exp (frag_now, where, 6, &(op1.exp), FALSE, |
| 2943 | BFD_RELOC_MSP430X_PCR20_EXT_SRC); |
| 2944 | } |
| 2945 | |
| 2946 | /* Emit the extension word. */ |
| 2947 | bfd_putl16 (extended, frag); |
| 2948 | frag += 2; |
| 2949 | where += 2; |
| 2950 | } |
| 2951 | |
| 2952 | bin |= op1.reg | (op1.am << 4); |
| 2953 | bfd_putl16 ((bfd_vma) bin, frag); |
| 2954 | frag += 2; |
| 2955 | where += 2; |
| 2956 | |
| 2957 | if (op1.mode == OP_EXP) |
| 2958 | { |
| 2959 | if (op1.exp.X_op == O_constant) |
| 2960 | { |
| 2961 | bfd_putl16 (op1.exp.X_add_number & 0xffff, frag); |
| 2962 | } |
| 2963 | else |
| 2964 | { |
| 2965 | bfd_putl16 ((bfd_vma) ZEROS, frag); |
| 2966 | |
| 2967 | if (!extended_op) |
| 2968 | { |
| 2969 | if (op1.reg || (op1.reg == 0 && op1.am == 3)) /* Not PC relative. */ |
| 2970 | fix_new_exp (frag_now, where, 2, |
| 2971 | &(op1.exp), FALSE, CHECK_RELOC_MSP430 (op1)); |
| 2972 | else |
| 2973 | fix_new_exp (frag_now, where, 2, |
| 2974 | &(op1.exp), TRUE, CHECK_RELOC_MSP430_PCREL); |
| 2975 | } |
| 2976 | } |
| 2977 | } |
| 2978 | |
| 2979 | dwarf2_emit_insn (insn_length); |
| 2980 | break; |
| 2981 | |
| 2982 | case 3: /* Conditional jumps instructions. */ |
| 2983 | line = extract_operand (line, l1, sizeof (l1)); |
| 2984 | /* l1 is a label. */ |
| 2985 | if (l1[0]) |
| 2986 | { |
| 2987 | char *m = l1; |
| 2988 | expressionS exp; |
| 2989 | |
| 2990 | if (*m == '$') |
| 2991 | m++; |
| 2992 | |
| 2993 | parse_exp (m, &exp); |
| 2994 | |
| 2995 | /* In order to handle something like: |
| 2996 | |
| 2997 | and #0x8000, r5 |
| 2998 | tst r5 |
| 2999 | jz 4 ; skip next 4 bytes |
| 3000 | inv r5 |
| 3001 | inc r5 |
| 3002 | nop ; will jump here if r5 positive or zero |
| 3003 | |
| 3004 | jCOND -n ;assumes jump n bytes backward: |
| 3005 | |
| 3006 | mov r5,r6 |
| 3007 | jmp -2 |
| 3008 | |
| 3009 | is equal to: |
| 3010 | lab: |
| 3011 | mov r5,r6 |
| 3012 | jmp lab |
| 3013 | |
| 3014 | jCOND $n ; jump from PC in either direction. */ |
| 3015 | |
| 3016 | if (exp.X_op == O_constant) |
| 3017 | { |
| 3018 | int x = exp.X_add_number; |
| 3019 | |
| 3020 | if (x & 1) |
| 3021 | { |
| 3022 | as_warn (_("Even number required. Rounded to %d"), x + 1); |
| 3023 | x++; |
| 3024 | } |
| 3025 | |
| 3026 | if ((*l1 == '$' && x > 0) || x < 0) |
| 3027 | x -= 2; |
| 3028 | |
| 3029 | x >>= 1; |
| 3030 | |
| 3031 | if (x > 512 || x < -511) |
| 3032 | { |
| 3033 | as_bad (_("Wrong displacement %d"), x << 1); |
| 3034 | break; |
| 3035 | } |
| 3036 | |
| 3037 | insn_length += 2; |
| 3038 | frag = frag_more (2); /* Instr size is 1 word. */ |
| 3039 | |
| 3040 | bin |= x & 0x3ff; |
| 3041 | bfd_putl16 ((bfd_vma) bin, frag); |
| 3042 | } |
| 3043 | else if (exp.X_op == O_symbol && *l1 != '$') |
| 3044 | { |
| 3045 | insn_length += 2; |
| 3046 | frag = frag_more (2); /* Instr size is 1 word. */ |
| 3047 | where = frag - frag_now->fr_literal; |
| 3048 | fix_new_exp (frag_now, where, 2, |
| 3049 | &exp, TRUE, BFD_RELOC_MSP430_10_PCREL); |
| 3050 | |
| 3051 | bfd_putl16 ((bfd_vma) bin, frag); |
| 3052 | } |
| 3053 | else if (*l1 == '$') |
| 3054 | { |
| 3055 | as_bad (_("instruction requires label sans '$'")); |
| 3056 | } |
| 3057 | else |
| 3058 | as_bad (_ |
| 3059 | ("instruction requires label or value in range -511:512")); |
| 3060 | dwarf2_emit_insn (insn_length); |
| 3061 | break; |
| 3062 | } |
| 3063 | else |
| 3064 | { |
| 3065 | as_bad (_("instruction requires label")); |
| 3066 | break; |
| 3067 | } |
| 3068 | break; |
| 3069 | |
| 3070 | case 4: /* Extended jumps. */ |
| 3071 | if (!msp430_enable_polys) |
| 3072 | { |
| 3073 | as_bad (_("polymorphs are not enabled. Use -mP option to enable.")); |
| 3074 | break; |
| 3075 | } |
| 3076 | |
| 3077 | line = extract_operand (line, l1, sizeof (l1)); |
| 3078 | if (l1[0]) |
| 3079 | { |
| 3080 | char *m = l1; |
| 3081 | expressionS exp; |
| 3082 | |
| 3083 | /* Ignore absolute addressing. make it PC relative anyway. */ |
| 3084 | if (*m == '#' || *m == '$') |
| 3085 | m++; |
| 3086 | |
| 3087 | parse_exp (m, & exp); |
| 3088 | if (exp.X_op == O_symbol) |
| 3089 | { |
| 3090 | /* Relaxation required. */ |
| 3091 | struct rcodes_s rc = msp430_rcodes[opcode->insn_opnumb]; |
| 3092 | |
| 3093 | if (target_is_430x ()) |
| 3094 | rc = msp430x_rcodes[opcode->insn_opnumb]; |
| 3095 | |
| 3096 | /* The parameter to dwarf2_emit_insn is actually the offset to |
| 3097 | the start of the insn from the fix piece of instruction that |
| 3098 | was emitted. Since next fragments may have variable size we |
| 3099 | tie debug info to the beginning of the instruction. */ |
| 3100 | insn_length += 8; |
| 3101 | frag = frag_more (8); |
| 3102 | dwarf2_emit_insn (0); |
| 3103 | bfd_putl16 ((bfd_vma) rc.sop, frag); |
| 3104 | frag = frag_variant (rs_machine_dependent, 8, 2, |
| 3105 | /* Wild guess. */ |
| 3106 | ENCODE_RELAX (rc.lpos, STATE_BITS10), |
| 3107 | exp.X_add_symbol, |
| 3108 | 0, /* Offset is zero if jump dist less than 1K. */ |
| 3109 | (char *) frag); |
| 3110 | break; |
| 3111 | } |
| 3112 | } |
| 3113 | |
| 3114 | as_bad (_("instruction requires label")); |
| 3115 | break; |
| 3116 | |
| 3117 | case 5: /* Emulated extended branches. */ |
| 3118 | if (!msp430_enable_polys) |
| 3119 | { |
| 3120 | as_bad (_("polymorphs are not enabled. Use -mP option to enable.")); |
| 3121 | break; |
| 3122 | } |
| 3123 | line = extract_operand (line, l1, sizeof (l1)); |
| 3124 | if (l1[0]) |
| 3125 | { |
| 3126 | char * m = l1; |
| 3127 | expressionS exp; |
| 3128 | |
| 3129 | /* Ignore absolute addressing. make it PC relative anyway. */ |
| 3130 | if (*m == '#' || *m == '$') |
| 3131 | m++; |
| 3132 | |
| 3133 | parse_exp (m, & exp); |
| 3134 | if (exp.X_op == O_symbol) |
| 3135 | { |
| 3136 | /* Relaxation required. */ |
| 3137 | struct hcodes_s hc = msp430_hcodes[opcode->insn_opnumb]; |
| 3138 | |
| 3139 | if (target_is_430x ()) |
| 3140 | hc = msp430x_hcodes[opcode->insn_opnumb]; |
| 3141 | |
| 3142 | insn_length += 8; |
| 3143 | frag = frag_more (8); |
| 3144 | dwarf2_emit_insn (0); |
| 3145 | bfd_putl16 ((bfd_vma) hc.op0, frag); |
| 3146 | bfd_putl16 ((bfd_vma) hc.op1, frag+2); |
| 3147 | |
| 3148 | frag = frag_variant (rs_machine_dependent, 8, 2, |
| 3149 | ENCODE_RELAX (STATE_EMUL_BRANCH, STATE_BITS10), /* Wild guess. */ |
| 3150 | exp.X_add_symbol, |
| 3151 | 0, /* Offset is zero if jump dist less than 1K. */ |
| 3152 | (char *) frag); |
| 3153 | break; |
| 3154 | } |
| 3155 | } |
| 3156 | |
| 3157 | as_bad (_("instruction requires label")); |
| 3158 | break; |
| 3159 | |
| 3160 | default: |
| 3161 | as_bad (_("Illegal instruction or not implemented opcode.")); |
| 3162 | } |
| 3163 | |
| 3164 | input_line_pointer = line; |
| 3165 | check_for_nop = nop_check_needed; |
| 3166 | return 0; |
| 3167 | } |
| 3168 | |
| 3169 | void |
| 3170 | md_assemble (char * str) |
| 3171 | { |
| 3172 | struct msp430_opcode_s * opcode; |
| 3173 | char cmd[32]; |
| 3174 | unsigned int i = 0; |
| 3175 | |
| 3176 | str = skip_space (str); /* Skip leading spaces. */ |
| 3177 | str = extract_cmd (str, cmd, sizeof (cmd) - 1); |
| 3178 | |
| 3179 | while (cmd[i]) |
| 3180 | { |
| 3181 | char a = TOLOWER (cmd[i]); |
| 3182 | cmd[i] = a; |
| 3183 | i++; |
| 3184 | } |
| 3185 | |
| 3186 | if (!cmd[0]) |
| 3187 | { |
| 3188 | as_bad (_("can't find opcode ")); |
| 3189 | return; |
| 3190 | } |
| 3191 | |
| 3192 | opcode = (struct msp430_opcode_s *) hash_find (msp430_hash, cmd); |
| 3193 | |
| 3194 | if (opcode == NULL) |
| 3195 | { |
| 3196 | as_bad (_("unknown opcode `%s'"), cmd); |
| 3197 | return; |
| 3198 | } |
| 3199 | |
| 3200 | { |
| 3201 | char *__t = input_line_pointer; |
| 3202 | |
| 3203 | msp430_operands (opcode, str); |
| 3204 | input_line_pointer = __t; |
| 3205 | } |
| 3206 | } |
| 3207 | |
| 3208 | /* GAS will call this function for each section at the end of the assembly, |
| 3209 | to permit the CPU backend to adjust the alignment of a section. */ |
| 3210 | |
| 3211 | valueT |
| 3212 | md_section_align (asection * seg, valueT addr) |
| 3213 | { |
| 3214 | int align = bfd_get_section_alignment (stdoutput, seg); |
| 3215 | |
| 3216 | return ((addr + (1 << align) - 1) & (-1 << align)); |
| 3217 | } |
| 3218 | |
| 3219 | /* If you define this macro, it should return the offset between the |
| 3220 | address of a PC relative fixup and the position from which the PC |
| 3221 | relative adjustment should be made. On many processors, the base |
| 3222 | of a PC relative instruction is the next instruction, so this |
| 3223 | macro would return the length of an instruction. */ |
| 3224 | |
| 3225 | long |
| 3226 | md_pcrel_from_section (fixS * fixp, segT sec) |
| 3227 | { |
| 3228 | if (fixp->fx_addsy != (symbolS *) NULL |
| 3229 | && (!S_IS_DEFINED (fixp->fx_addsy) |
| 3230 | || (S_GET_SEGMENT (fixp->fx_addsy) != sec))) |
| 3231 | return 0; |
| 3232 | |
| 3233 | return fixp->fx_frag->fr_address + fixp->fx_where; |
| 3234 | } |
| 3235 | |
| 3236 | /* Replaces standard TC_FORCE_RELOCATION_LOCAL. |
| 3237 | Now it handles the situation when relocations |
| 3238 | have to be passed to linker. */ |
| 3239 | int |
| 3240 | msp430_force_relocation_local (fixS *fixp) |
| 3241 | { |
| 3242 | if (fixp->fx_r_type == BFD_RELOC_MSP430_10_PCREL) |
| 3243 | return 1; |
| 3244 | if (fixp->fx_pcrel) |
| 3245 | return 1; |
| 3246 | if (msp430_enable_polys |
| 3247 | && !msp430_enable_relax) |
| 3248 | return 1; |
| 3249 | |
| 3250 | return (!fixp->fx_pcrel |
| 3251 | || generic_force_reloc (fixp)); |
| 3252 | } |
| 3253 | |
| 3254 | |
| 3255 | /* GAS will call this for each fixup. It should store the correct |
| 3256 | value in the object file. */ |
| 3257 | void |
| 3258 | md_apply_fix (fixS * fixp, valueT * valuep, segT seg) |
| 3259 | { |
| 3260 | unsigned char * where; |
| 3261 | unsigned long insn; |
| 3262 | long value; |
| 3263 | |
| 3264 | if (fixp->fx_addsy == (symbolS *) NULL) |
| 3265 | { |
| 3266 | value = *valuep; |
| 3267 | fixp->fx_done = 1; |
| 3268 | } |
| 3269 | else if (fixp->fx_pcrel) |
| 3270 | { |
| 3271 | segT s = S_GET_SEGMENT (fixp->fx_addsy); |
| 3272 | |
| 3273 | if (fixp->fx_addsy && (s == seg || s == absolute_section)) |
| 3274 | { |
| 3275 | /* FIXME: We can appear here only in case if we perform a pc |
| 3276 | relative jump to the label which is i) global, ii) locally |
| 3277 | defined or this is a jump to an absolute symbol. |
| 3278 | If this is an absolute symbol -- everything is OK. |
| 3279 | If this is a global label, we've got a symbol value defined |
| 3280 | twice: |
| 3281 | 1. S_GET_VALUE (fixp->fx_addsy) will contain a symbol offset |
| 3282 | from this section start |
| 3283 | 2. *valuep will contain the real offset from jump insn to the |
| 3284 | label |
| 3285 | So, the result of S_GET_VALUE (fixp->fx_addsy) + (* valuep); |
| 3286 | will be incorrect. Therefore remove s_get_value. */ |
| 3287 | value = /* S_GET_VALUE (fixp->fx_addsy) + */ * valuep; |
| 3288 | fixp->fx_done = 1; |
| 3289 | } |
| 3290 | else |
| 3291 | value = *valuep; |
| 3292 | } |
| 3293 | else |
| 3294 | { |
| 3295 | value = fixp->fx_offset; |
| 3296 | |
| 3297 | if (fixp->fx_subsy != (symbolS *) NULL) |
| 3298 | { |
| 3299 | if (S_GET_SEGMENT (fixp->fx_subsy) == absolute_section) |
| 3300 | { |
| 3301 | value -= S_GET_VALUE (fixp->fx_subsy); |
| 3302 | fixp->fx_done = 1; |
| 3303 | } |
| 3304 | } |
| 3305 | } |
| 3306 | |
| 3307 | fixp->fx_no_overflow = 1; |
| 3308 | |
| 3309 | /* If polymorphs are enabled and relax disabled. |
| 3310 | do not kill any relocs and pass them to linker. */ |
| 3311 | if (msp430_enable_polys |
| 3312 | && !msp430_enable_relax) |
| 3313 | { |
| 3314 | if (!fixp->fx_addsy || (fixp->fx_addsy |
| 3315 | && S_GET_SEGMENT (fixp->fx_addsy) == absolute_section)) |
| 3316 | fixp->fx_done = 1; /* It is ok to kill 'abs' reloc. */ |
| 3317 | else |
| 3318 | fixp->fx_done = 0; |
| 3319 | } |
| 3320 | |
| 3321 | if (fixp->fx_done) |
| 3322 | { |
| 3323 | /* Fetch the instruction, insert the fully resolved operand |
| 3324 | value, and stuff the instruction back again. */ |
| 3325 | where = (unsigned char *) fixp->fx_frag->fr_literal + fixp->fx_where; |
| 3326 | |
| 3327 | insn = bfd_getl16 (where); |
| 3328 | |
| 3329 | switch (fixp->fx_r_type) |
| 3330 | { |
| 3331 | case BFD_RELOC_MSP430_10_PCREL: |
| 3332 | if (value & 1) |
| 3333 | as_bad_where (fixp->fx_file, fixp->fx_line, |
| 3334 | _("odd address operand: %ld"), value); |
| 3335 | |
| 3336 | /* Jumps are in words. */ |
| 3337 | value >>= 1; |
| 3338 | --value; /* Correct PC. */ |
| 3339 | |
| 3340 | if (value < -512 || value > 511) |
| 3341 | as_bad_where (fixp->fx_file, fixp->fx_line, |
| 3342 | _("operand out of range: %ld"), value); |
| 3343 | |
| 3344 | value &= 0x3ff; /* get rid of extended sign */ |
| 3345 | bfd_putl16 ((bfd_vma) (value | insn), where); |
| 3346 | break; |
| 3347 | |
| 3348 | case BFD_RELOC_MSP430X_PCR16: |
| 3349 | case BFD_RELOC_MSP430_RL_PCREL: |
| 3350 | case BFD_RELOC_MSP430_16_PCREL: |
| 3351 | if (value & 1) |
| 3352 | as_bad_where (fixp->fx_file, fixp->fx_line, |
| 3353 | _("odd address operand: %ld"), value); |
| 3354 | /* Fall through. */ |
| 3355 | |
| 3356 | case BFD_RELOC_MSP430_16_PCREL_BYTE: |
| 3357 | /* Nothing to be corrected here. */ |
| 3358 | if (value < -32768 || value > 65536) |
| 3359 | as_bad_where (fixp->fx_file, fixp->fx_line, |
| 3360 | _("operand out of range: %ld"), value); |
| 3361 | /* Fall through. */ |
| 3362 | |
| 3363 | case BFD_RELOC_MSP430X_ABS16: |
| 3364 | case BFD_RELOC_MSP430_16: |
| 3365 | case BFD_RELOC_16: |
| 3366 | case BFD_RELOC_MSP430_16_BYTE: |
| 3367 | value &= 0xffff; /* Get rid of extended sign. */ |
| 3368 | bfd_putl16 ((bfd_vma) value, where); |
| 3369 | break; |
| 3370 | |
| 3371 | case BFD_RELOC_MSP430_ABS_HI16: |
| 3372 | value >>= 16; |
| 3373 | value &= 0xffff; /* Get rid of extended sign. */ |
| 3374 | bfd_putl16 ((bfd_vma) value, where); |
| 3375 | break; |
| 3376 | |
| 3377 | case BFD_RELOC_32: |
| 3378 | bfd_putl16 ((bfd_vma) value, where); |
| 3379 | break; |
| 3380 | |
| 3381 | case BFD_RELOC_MSP430_ABS8: |
| 3382 | case BFD_RELOC_8: |
| 3383 | bfd_put_8 (NULL, (bfd_vma) value, where); |
| 3384 | break; |
| 3385 | |
| 3386 | case BFD_RELOC_MSP430X_ABS20_EXT_SRC: |
| 3387 | case BFD_RELOC_MSP430X_PCR20_EXT_SRC: |
| 3388 | bfd_putl16 ((bfd_vma) (value & 0xffff), where + 4); |
| 3389 | value >>= 16; |
| 3390 | bfd_putl16 ((bfd_vma) (((value & 0xf) << 7) | insn), where); |
| 3391 | break; |
| 3392 | |
| 3393 | case BFD_RELOC_MSP430X_ABS20_ADR_SRC: |
| 3394 | bfd_putl16 ((bfd_vma) (value & 0xffff), where + 2); |
| 3395 | value >>= 16; |
| 3396 | bfd_putl16 ((bfd_vma) (((value & 0xf) << 8) | insn), where); |
| 3397 | break; |
| 3398 | |
| 3399 | case BFD_RELOC_MSP430X_ABS20_EXT_ODST: |
| 3400 | bfd_putl16 ((bfd_vma) (value & 0xffff), where + 6); |
| 3401 | value >>= 16; |
| 3402 | bfd_putl16 ((bfd_vma) ((value & 0xf) | insn), where); |
| 3403 | break; |
| 3404 | |
| 3405 | case BFD_RELOC_MSP430X_PCR20_CALL: |
| 3406 | bfd_putl16 ((bfd_vma) (value & 0xffff), where + 2); |
| 3407 | value >>= 16; |
| 3408 | bfd_putl16 ((bfd_vma) ((value & 0xf) | insn), where); |
| 3409 | break; |
| 3410 | |
| 3411 | case BFD_RELOC_MSP430X_ABS20_EXT_DST: |
| 3412 | case BFD_RELOC_MSP430X_PCR20_EXT_DST: |
| 3413 | bfd_putl16 ((bfd_vma) (value & 0xffff), where + 4); |
| 3414 | value >>= 16; |
| 3415 | bfd_putl16 ((bfd_vma) ((value & 0xf) | insn), where); |
| 3416 | break; |
| 3417 | |
| 3418 | case BFD_RELOC_MSP430X_PCR20_EXT_ODST: |
| 3419 | bfd_putl16 ((bfd_vma) (value & 0xffff), where + 6); |
| 3420 | value >>= 16; |
| 3421 | bfd_putl16 ((bfd_vma) ((value & 0xf) | insn), where); |
| 3422 | break; |
| 3423 | |
| 3424 | case BFD_RELOC_MSP430X_ABS20_ADR_DST: |
| 3425 | bfd_putl16 ((bfd_vma) (value & 0xffff), where + 2); |
| 3426 | value >>= 16; |
| 3427 | bfd_putl16 ((bfd_vma) ((value & 0xf) | insn), where); |
| 3428 | break; |
| 3429 | |
| 3430 | default: |
| 3431 | as_fatal (_("line %d: unknown relocation type: 0x%x"), |
| 3432 | fixp->fx_line, fixp->fx_r_type); |
| 3433 | break; |
| 3434 | } |
| 3435 | } |
| 3436 | else |
| 3437 | { |
| 3438 | fixp->fx_addnumber = value; |
| 3439 | } |
| 3440 | } |
| 3441 | |
| 3442 | static bfd_boolean |
| 3443 | S_IS_GAS_LOCAL (symbolS * s) |
| 3444 | { |
| 3445 | const char * name; |
| 3446 | unsigned int len; |
| 3447 | |
| 3448 | if (s == NULL) |
| 3449 | return FALSE; |
| 3450 | name = S_GET_NAME (s); |
| 3451 | len = strlen (name) - 1; |
| 3452 | |
| 3453 | return name[len] == 1 || name[len] == 2; |
| 3454 | } |
| 3455 | |
| 3456 | /* GAS will call this to generate a reloc, passing the resulting reloc |
| 3457 | to `bfd_install_relocation'. This currently works poorly, as |
| 3458 | `bfd_install_relocation' often does the wrong thing, and instances of |
| 3459 | `tc_gen_reloc' have been written to work around the problems, which |
| 3460 | in turns makes it difficult to fix `bfd_install_relocation'. */ |
| 3461 | |
| 3462 | /* If while processing a fixup, a reloc really needs to be created |
| 3463 | then it is done here. */ |
| 3464 | |
| 3465 | arelent ** |
| 3466 | tc_gen_reloc (asection * seg ATTRIBUTE_UNUSED, fixS * fixp) |
| 3467 | { |
| 3468 | static arelent * no_relocs = NULL; |
| 3469 | static arelent * relocs[MAX_RELOC_EXPANSION + 1]; |
| 3470 | arelent *reloc; |
| 3471 | |
| 3472 | reloc = xmalloc (sizeof (arelent)); |
| 3473 | reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; |
| 3474 | reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type); |
| 3475 | |
| 3476 | if (reloc->howto == (reloc_howto_type *) NULL) |
| 3477 | { |
| 3478 | as_bad_where (fixp->fx_file, fixp->fx_line, |
| 3479 | _("reloc %d not supported by object file format"), |
| 3480 | (int) fixp->fx_r_type); |
| 3481 | free (reloc); |
| 3482 | return & no_relocs; |
| 3483 | } |
| 3484 | |
| 3485 | relocs[0] = reloc; |
| 3486 | relocs[1] = NULL; |
| 3487 | |
| 3488 | if (fixp->fx_subsy |
| 3489 | && S_GET_SEGMENT (fixp->fx_subsy) == absolute_section) |
| 3490 | { |
| 3491 | fixp->fx_offset -= S_GET_VALUE (fixp->fx_subsy); |
| 3492 | fixp->fx_subsy = NULL; |
| 3493 | } |
| 3494 | |
| 3495 | if (fixp->fx_addsy && fixp->fx_subsy) |
| 3496 | { |
| 3497 | asection *asec, *ssec; |
| 3498 | |
| 3499 | asec = S_GET_SEGMENT (fixp->fx_addsy); |
| 3500 | ssec = S_GET_SEGMENT (fixp->fx_subsy); |
| 3501 | |
| 3502 | /* If we have a difference between two different, non-absolute symbols |
| 3503 | we must generate two relocs (one for each symbol) and allow the |
| 3504 | linker to resolve them - relaxation may change the distances between |
| 3505 | symbols, even local symbols defined in the same section. |
| 3506 | |
| 3507 | Unfortunately we cannot do this with assembler generated local labels |
| 3508 | because there can be multiple incarnations of the same label, with |
| 3509 | exactly the same name, in any given section and the linker will have |
| 3510 | no way to identify the correct one. Instead we just have to hope |
| 3511 | that no relaxtion will occur between the local label and the other |
| 3512 | symbol in the expression. |
| 3513 | |
| 3514 | Similarly we have to compute differences between symbols in the .eh_frame |
| 3515 | section as the linker is not smart enough to apply relocations there |
| 3516 | before attempting to process it. */ |
| 3517 | if ((ssec != absolute_section || asec != absolute_section) |
| 3518 | && (fixp->fx_addsy != fixp->fx_subsy) |
| 3519 | && strcmp (ssec->name, ".eh_frame") != 0 |
| 3520 | && ! S_IS_GAS_LOCAL (fixp->fx_addsy) |
| 3521 | && ! S_IS_GAS_LOCAL (fixp->fx_subsy)) |
| 3522 | { |
| 3523 | arelent * reloc2 = xmalloc (sizeof * reloc); |
| 3524 | |
| 3525 | relocs[0] = reloc2; |
| 3526 | relocs[1] = reloc; |
| 3527 | |
| 3528 | reloc2->address = reloc->address; |
| 3529 | reloc2->howto = bfd_reloc_type_lookup (stdoutput, |
| 3530 | BFD_RELOC_MSP430_SYM_DIFF); |
| 3531 | reloc2->addend = - S_GET_VALUE (fixp->fx_subsy); |
| 3532 | |
| 3533 | if (ssec == absolute_section) |
| 3534 | reloc2->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; |
| 3535 | else |
| 3536 | { |
| 3537 | reloc2->sym_ptr_ptr = xmalloc (sizeof (asymbol *)); |
| 3538 | *reloc2->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_subsy); |
| 3539 | } |
| 3540 | |
| 3541 | reloc->addend = fixp->fx_offset; |
| 3542 | if (asec == absolute_section) |
| 3543 | { |
| 3544 | reloc->addend += S_GET_VALUE (fixp->fx_addsy); |
| 3545 | reloc->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; |
| 3546 | } |
| 3547 | else |
| 3548 | { |
| 3549 | reloc->sym_ptr_ptr = xmalloc (sizeof (asymbol *)); |
| 3550 | *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); |
| 3551 | } |
| 3552 | |
| 3553 | fixp->fx_pcrel = 0; |
| 3554 | fixp->fx_done = 1; |
| 3555 | return relocs; |
| 3556 | } |
| 3557 | else |
| 3558 | { |
| 3559 | char *fixpos = fixp->fx_where + fixp->fx_frag->fr_literal; |
| 3560 | |
| 3561 | reloc->addend = (S_GET_VALUE (fixp->fx_addsy) |
| 3562 | - S_GET_VALUE (fixp->fx_subsy) + fixp->fx_offset); |
| 3563 | |
| 3564 | switch (fixp->fx_r_type) |
| 3565 | { |
| 3566 | case BFD_RELOC_8: |
| 3567 | md_number_to_chars (fixpos, reloc->addend, 1); |
| 3568 | break; |
| 3569 | |
| 3570 | case BFD_RELOC_16: |
| 3571 | md_number_to_chars (fixpos, reloc->addend, 2); |
| 3572 | break; |
| 3573 | |
| 3574 | case BFD_RELOC_24: |
| 3575 | md_number_to_chars (fixpos, reloc->addend, 3); |
| 3576 | break; |
| 3577 | |
| 3578 | case BFD_RELOC_32: |
| 3579 | md_number_to_chars (fixpos, reloc->addend, 4); |
| 3580 | break; |
| 3581 | |
| 3582 | default: |
| 3583 | reloc->sym_ptr_ptr |
| 3584 | = (asymbol **) bfd_abs_section_ptr->symbol_ptr_ptr; |
| 3585 | return relocs; |
| 3586 | } |
| 3587 | |
| 3588 | free (reloc); |
| 3589 | return & no_relocs; |
| 3590 | } |
| 3591 | } |
| 3592 | else |
| 3593 | { |
| 3594 | #if 0 |
| 3595 | if (fixp->fx_r_type == BFD_RELOC_MSP430X_ABS16 |
| 3596 | && S_GET_SEGMENT (fixp->fx_addsy) == absolute_section) |
| 3597 | { |
| 3598 | bfd_vma amount = S_GET_VALUE (fixp->fx_addsy); |
| 3599 | char *fixpos = fixp->fx_where + fixp->fx_frag->fr_literal; |
| 3600 | |
| 3601 | md_number_to_chars (fixpos, amount, 2); |
| 3602 | free (reloc); |
| 3603 | return & no_relocs; |
| 3604 | } |
| 3605 | #endif |
| 3606 | reloc->sym_ptr_ptr = xmalloc (sizeof (asymbol *)); |
| 3607 | *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); |
| 3608 | reloc->addend = fixp->fx_offset; |
| 3609 | |
| 3610 | if (fixp->fx_r_type == BFD_RELOC_VTABLE_INHERIT |
| 3611 | || fixp->fx_r_type == BFD_RELOC_VTABLE_ENTRY) |
| 3612 | reloc->address = fixp->fx_offset; |
| 3613 | } |
| 3614 | |
| 3615 | return relocs; |
| 3616 | } |
| 3617 | |
| 3618 | int |
| 3619 | md_estimate_size_before_relax (fragS * fragP ATTRIBUTE_UNUSED, |
| 3620 | asection * segment_type ATTRIBUTE_UNUSED) |
| 3621 | { |
| 3622 | if (fragP->fr_symbol && S_GET_SEGMENT (fragP->fr_symbol) == segment_type) |
| 3623 | { |
| 3624 | /* This is a jump -> pcrel mode. Nothing to do much here. |
| 3625 | Return value == 2. */ |
| 3626 | fragP->fr_subtype = |
| 3627 | ENCODE_RELAX (RELAX_LEN (fragP->fr_subtype), STATE_BITS10); |
| 3628 | } |
| 3629 | else if (fragP->fr_symbol) |
| 3630 | { |
| 3631 | /* Its got a segment, but its not ours. Even if fr_symbol is in |
| 3632 | an absolute segment, we don't know a displacement until we link |
| 3633 | object files. So it will always be long. This also applies to |
| 3634 | labels in a subsegment of current. Liker may relax it to short |
| 3635 | jump later. Return value == 8. */ |
| 3636 | fragP->fr_subtype = |
| 3637 | ENCODE_RELAX (RELAX_LEN (fragP->fr_subtype), STATE_WORD); |
| 3638 | } |
| 3639 | else |
| 3640 | { |
| 3641 | /* We know the abs value. may be it is a jump to fixed address. |
| 3642 | Impossible in our case, cause all constants already handled. */ |
| 3643 | fragP->fr_subtype = |
| 3644 | ENCODE_RELAX (RELAX_LEN (fragP->fr_subtype), STATE_UNDEF); |
| 3645 | } |
| 3646 | |
| 3647 | return md_relax_table[fragP->fr_subtype].rlx_length; |
| 3648 | } |
| 3649 | |
| 3650 | void |
| 3651 | md_convert_frag (bfd * abfd ATTRIBUTE_UNUSED, |
| 3652 | asection * sec ATTRIBUTE_UNUSED, |
| 3653 | fragS * fragP) |
| 3654 | { |
| 3655 | char * where = 0; |
| 3656 | int rela = -1; |
| 3657 | int i; |
| 3658 | struct rcodes_s * cc = NULL; |
| 3659 | struct hcodes_s * hc = NULL; |
| 3660 | |
| 3661 | switch (fragP->fr_subtype) |
| 3662 | { |
| 3663 | case ENCODE_RELAX (STATE_UNCOND_BRANCH, STATE_BITS10): |
| 3664 | case ENCODE_RELAX (STATE_SIMPLE_BRANCH, STATE_BITS10): |
| 3665 | case ENCODE_RELAX (STATE_NOOV_BRANCH, STATE_BITS10): |
| 3666 | /* We do not have to convert anything here. |
| 3667 | Just apply a fix. */ |
| 3668 | rela = BFD_RELOC_MSP430_10_PCREL; |
| 3669 | break; |
| 3670 | |
| 3671 | case ENCODE_RELAX (STATE_UNCOND_BRANCH, STATE_WORD): |
| 3672 | case ENCODE_RELAX (STATE_UNCOND_BRANCH, STATE_UNDEF): |
| 3673 | /* Convert uncond branch jmp lab -> br lab. */ |
| 3674 | if (target_is_430x ()) |
| 3675 | cc = msp430x_rcodes + 7; |
| 3676 | else |
| 3677 | cc = msp430_rcodes + 7; |
| 3678 | where = fragP->fr_literal + fragP->fr_fix; |
| 3679 | bfd_putl16 (cc->lop0, where); |
| 3680 | rela = BFD_RELOC_MSP430_RL_PCREL; |
| 3681 | fragP->fr_fix += 2; |
| 3682 | break; |
| 3683 | |
| 3684 | case ENCODE_RELAX (STATE_SIMPLE_BRANCH, STATE_WORD): |
| 3685 | case ENCODE_RELAX (STATE_SIMPLE_BRANCH, STATE_UNDEF): |
| 3686 | { |
| 3687 | /* Other simple branches. */ |
| 3688 | int insn = bfd_getl16 (fragP->fr_opcode); |
| 3689 | |
| 3690 | insn &= 0xffff; |
| 3691 | /* Find actual instruction. */ |
| 3692 | if (target_is_430x ()) |
| 3693 | { |
| 3694 | for (i = 0; i < 7 && !cc; i++) |
| 3695 | if (msp430x_rcodes[i].sop == insn) |
| 3696 | cc = msp430x_rcodes + i; |
| 3697 | } |
| 3698 | else |
| 3699 | { |
| 3700 | for (i = 0; i < 7 && !cc; i++) |
| 3701 | if (msp430_rcodes[i].sop == insn) |
| 3702 | cc = & msp430_rcodes[i]; |
| 3703 | } |
| 3704 | |
| 3705 | if (!cc || !cc->name) |
| 3706 | as_fatal (_("internal inconsistency problem in %s: insn %04lx"), |
| 3707 | __FUNCTION__, (long) insn); |
| 3708 | where = fragP->fr_literal + fragP->fr_fix; |
| 3709 | bfd_putl16 (cc->lop0, where); |
| 3710 | bfd_putl16 (cc->lop1, where + 2); |
| 3711 | rela = BFD_RELOC_MSP430_RL_PCREL; |
| 3712 | fragP->fr_fix += 4; |
| 3713 | } |
| 3714 | break; |
| 3715 | |
| 3716 | case ENCODE_RELAX (STATE_NOOV_BRANCH, STATE_WORD): |
| 3717 | case ENCODE_RELAX (STATE_NOOV_BRANCH, STATE_UNDEF): |
| 3718 | if (target_is_430x ()) |
| 3719 | cc = msp430x_rcodes + 6; |
| 3720 | else |
| 3721 | cc = msp430_rcodes + 6; |
| 3722 | where = fragP->fr_literal + fragP->fr_fix; |
| 3723 | bfd_putl16 (cc->lop0, where); |
| 3724 | bfd_putl16 (cc->lop1, where + 2); |
| 3725 | bfd_putl16 (cc->lop2, where + 4); |
| 3726 | rela = BFD_RELOC_MSP430_RL_PCREL; |
| 3727 | fragP->fr_fix += 6; |
| 3728 | break; |
| 3729 | |
| 3730 | case ENCODE_RELAX (STATE_EMUL_BRANCH, STATE_BITS10): |
| 3731 | { |
| 3732 | int insn = bfd_getl16 (fragP->fr_opcode + 2); |
| 3733 | |
| 3734 | insn &= 0xffff; |
| 3735 | if (target_is_430x ()) |
| 3736 | { |
| 3737 | for (i = 0; i < 4 && !hc; i++) |
| 3738 | if (msp430x_hcodes[i].op1 == insn) |
| 3739 | hc = msp430x_hcodes + i; |
| 3740 | } |
| 3741 | else |
| 3742 | { |
| 3743 | for (i = 0; i < 4 && !hc; i++) |
| 3744 | if (msp430_hcodes[i].op1 == insn) |
| 3745 | hc = &msp430_hcodes[i]; |
| 3746 | } |
| 3747 | if (!hc || !hc->name) |
| 3748 | as_fatal (_("internal inconsistency problem in %s: ext. insn %04lx"), |
| 3749 | __FUNCTION__, (long) insn); |
| 3750 | rela = BFD_RELOC_MSP430_10_PCREL; |
| 3751 | /* Apply a fix for a first label if necessary. |
| 3752 | another fix will be applied to the next word of insn anyway. */ |
| 3753 | if (hc->tlab == 2) |
| 3754 | fix_new (fragP, fragP->fr_fix, 2, fragP->fr_symbol, |
| 3755 | fragP->fr_offset, TRUE, rela); |
| 3756 | fragP->fr_fix += 2; |
| 3757 | } |
| 3758 | |
| 3759 | break; |
| 3760 | |
| 3761 | case ENCODE_RELAX (STATE_EMUL_BRANCH, STATE_WORD): |
| 3762 | case ENCODE_RELAX (STATE_EMUL_BRANCH, STATE_UNDEF): |
| 3763 | { |
| 3764 | int insn = bfd_getl16 (fragP->fr_opcode + 2); |
| 3765 | |
| 3766 | insn &= 0xffff; |
| 3767 | if (target_is_430x ()) |
| 3768 | { |
| 3769 | for (i = 0; i < 4 && !hc; i++) |
| 3770 | if (msp430x_hcodes[i].op1 == insn) |
| 3771 | hc = msp430x_hcodes + i; |
| 3772 | } |
| 3773 | else |
| 3774 | { |
| 3775 | for (i = 0; i < 4 && !hc; i++) |
| 3776 | if (msp430_hcodes[i].op1 == insn) |
| 3777 | hc = & msp430_hcodes[i]; |
| 3778 | } |
| 3779 | if (!hc || !hc->name) |
| 3780 | as_fatal (_("internal inconsistency problem in %s: ext. insn %04lx"), |
| 3781 | __FUNCTION__, (long) insn); |
| 3782 | rela = BFD_RELOC_MSP430_RL_PCREL; |
| 3783 | where = fragP->fr_literal + fragP->fr_fix; |
| 3784 | bfd_putl16 (hc->lop0, where); |
| 3785 | bfd_putl16 (hc->lop1, where + 2); |
| 3786 | bfd_putl16 (hc->lop2, where + 4); |
| 3787 | fragP->fr_fix += 6; |
| 3788 | } |
| 3789 | break; |
| 3790 | |
| 3791 | default: |
| 3792 | as_fatal (_("internal inconsistency problem in %s: %lx"), |
| 3793 | __FUNCTION__, (long) fragP->fr_subtype); |
| 3794 | break; |
| 3795 | } |
| 3796 | |
| 3797 | /* Now apply fix. */ |
| 3798 | fix_new (fragP, fragP->fr_fix, 2, fragP->fr_symbol, |
| 3799 | fragP->fr_offset, TRUE, rela); |
| 3800 | /* Just fixed 2 bytes. */ |
| 3801 | fragP->fr_fix += 2; |
| 3802 | } |
| 3803 | |
| 3804 | /* Relax fragment. Mostly stolen from hc11 and mcore |
| 3805 | which arches I think I know. */ |
| 3806 | |
| 3807 | long |
| 3808 | msp430_relax_frag (segT seg ATTRIBUTE_UNUSED, fragS * fragP, |
| 3809 | long stretch ATTRIBUTE_UNUSED) |
| 3810 | { |
| 3811 | long growth; |
| 3812 | offsetT aim = 0; |
| 3813 | symbolS *symbolP; |
| 3814 | const relax_typeS *this_type; |
| 3815 | const relax_typeS *start_type; |
| 3816 | relax_substateT next_state; |
| 3817 | relax_substateT this_state; |
| 3818 | const relax_typeS *table = md_relax_table; |
| 3819 | |
| 3820 | /* Nothing to be done if the frag has already max size. */ |
| 3821 | if (RELAX_STATE (fragP->fr_subtype) == STATE_UNDEF |
| 3822 | || RELAX_STATE (fragP->fr_subtype) == STATE_WORD) |
| 3823 | return 0; |
| 3824 | |
| 3825 | if (RELAX_STATE (fragP->fr_subtype) == STATE_BITS10) |
| 3826 | { |
| 3827 | symbolP = fragP->fr_symbol; |
| 3828 | if (symbol_resolved_p (symbolP)) |
| 3829 | as_fatal (_("internal inconsistency problem in %s: resolved symbol"), |
| 3830 | __FUNCTION__); |
| 3831 | /* We know the offset. calculate a distance. */ |
| 3832 | aim = S_GET_VALUE (symbolP) - fragP->fr_address - fragP->fr_fix; |
| 3833 | } |
| 3834 | |
| 3835 | if (!msp430_enable_relax) |
| 3836 | { |
| 3837 | /* Relaxation is not enabled. So, make all jump as long ones |
| 3838 | by setting 'aim' to quite high value. */ |
| 3839 | aim = 0x7fff; |
| 3840 | } |
| 3841 | |
| 3842 | this_state = fragP->fr_subtype; |
| 3843 | start_type = this_type = table + this_state; |
| 3844 | |
| 3845 | if (aim < 0) |
| 3846 | { |
| 3847 | /* Look backwards. */ |
| 3848 | for (next_state = this_type->rlx_more; next_state;) |
| 3849 | if (aim >= this_type->rlx_backward || !this_type->rlx_backward) |
| 3850 | next_state = 0; |
| 3851 | else |
| 3852 | { |
| 3853 | /* Grow to next state. */ |
| 3854 | this_state = next_state; |
| 3855 | this_type = table + this_state; |
| 3856 | next_state = this_type->rlx_more; |
| 3857 | } |
| 3858 | } |
| 3859 | else |
| 3860 | { |
| 3861 | /* Look forwards. */ |
| 3862 | for (next_state = this_type->rlx_more; next_state;) |
| 3863 | if (aim <= this_type->rlx_forward || !this_type->rlx_forward) |
| 3864 | next_state = 0; |
| 3865 | else |
| 3866 | { |
| 3867 | /* Grow to next state. */ |
| 3868 | this_state = next_state; |
| 3869 | this_type = table + this_state; |
| 3870 | next_state = this_type->rlx_more; |
| 3871 | } |
| 3872 | } |
| 3873 | |
| 3874 | growth = this_type->rlx_length - start_type->rlx_length; |
| 3875 | if (growth != 0) |
| 3876 | fragP->fr_subtype = this_state; |
| 3877 | return growth; |
| 3878 | } |
| 3879 | |
| 3880 | /* Return FALSE if the fixup in fixp should be left alone and not |
| 3881 | adjusted. We return FALSE here so that linker relaxation will |
| 3882 | work. */ |
| 3883 | |
| 3884 | bfd_boolean |
| 3885 | msp430_fix_adjustable (struct fix *fixp ATTRIBUTE_UNUSED) |
| 3886 | { |
| 3887 | /* If the symbol is in a non-code section then it should be OK. */ |
| 3888 | if (fixp->fx_addsy |
| 3889 | && ((S_GET_SEGMENT (fixp->fx_addsy)->flags & SEC_CODE) == 0)) |
| 3890 | return TRUE; |
| 3891 | |
| 3892 | return FALSE; |
| 3893 | } |
| 3894 | |
| 3895 | /* Set the contents of the .MSP430.attributes section. */ |
| 3896 | |
| 3897 | void |
| 3898 | msp430_md_end (void) |
| 3899 | { |
| 3900 | if (check_for_nop == TRUE && warn_interrupt_nops) |
| 3901 | as_warn ("assembly finished with the last instruction changing interrupt state - a NOP might be needed"); |
| 3902 | |
| 3903 | bfd_elf_add_proc_attr_int (stdoutput, OFBA_MSPABI_Tag_ISA, |
| 3904 | target_is_430x () ? 2 : 1); |
| 3905 | |
| 3906 | bfd_elf_add_proc_attr_int (stdoutput, OFBA_MSPABI_Tag_Code_Model, |
| 3907 | large_model ? 2 : 1); |
| 3908 | |
| 3909 | bfd_elf_add_proc_attr_int (stdoutput, OFBA_MSPABI_Tag_Data_Model, |
| 3910 | large_model ? 2 : 1); |
| 3911 | } |
| 3912 | |
| 3913 | /* Returns FALSE if there is a msp430 specific reason why the |
| 3914 | subtraction of two same-section symbols cannot be computed by |
| 3915 | the assembler. */ |
| 3916 | |
| 3917 | bfd_boolean |
| 3918 | msp430_allow_local_subtract (expressionS * left, |
| 3919 | expressionS * right, |
| 3920 | segT section) |
| 3921 | { |
| 3922 | /* If the symbols are not in a code section then they are OK. */ |
| 3923 | if ((section->flags & SEC_CODE) == 0) |
| 3924 | return TRUE; |
| 3925 | |
| 3926 | if (S_IS_GAS_LOCAL (left->X_add_symbol) || S_IS_GAS_LOCAL (right->X_add_symbol)) |
| 3927 | return TRUE; |
| 3928 | |
| 3929 | if (left->X_add_symbol == right->X_add_symbol) |
| 3930 | return TRUE; |
| 3931 | |
| 3932 | /* We have to assume that there may be instructions between the |
| 3933 | two symbols and that relaxation may increase the distance between |
| 3934 | them. */ |
| 3935 | return FALSE; |
| 3936 | } |