| 1 | /* ns32k.c -- Assemble on the National Semiconductor 32k series |
| 2 | Copyright 1987, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, |
| 3 | 2001, 2002, 2003, 2005, 2006, 2007, 2008, 2009 |
| 4 | Free Software Foundation, Inc. |
| 5 | |
| 6 | This file is part of GAS, the GNU Assembler. |
| 7 | |
| 8 | GAS is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 3, or (at your option) |
| 11 | any later version. |
| 12 | |
| 13 | GAS is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with GAS; see the file COPYING. If not, write to the Free |
| 20 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA |
| 21 | 02110-1301, USA. */ |
| 22 | |
| 23 | /*#define SHOW_NUM 1*//* Uncomment for debugging. */ |
| 24 | |
| 25 | #include "as.h" |
| 26 | #include "opcode/ns32k.h" |
| 27 | |
| 28 | #include "obstack.h" |
| 29 | |
| 30 | /* Macros. */ |
| 31 | #define IIF_ENTRIES 13 /* Number of entries in iif. */ |
| 32 | #define PRIVATE_SIZE 256 /* Size of my garbage memory. */ |
| 33 | #define MAX_ARGS 4 |
| 34 | #define DEFAULT -1 /* addr_mode returns this value when |
| 35 | plain constant or label is |
| 36 | encountered. */ |
| 37 | |
| 38 | #define IIF(ptr,a1,c1,e1,g1,i1,k1,m1,o1,q1,s1,u1) \ |
| 39 | iif.iifP[ptr].type = a1; \ |
| 40 | iif.iifP[ptr].size = c1; \ |
| 41 | iif.iifP[ptr].object = e1; \ |
| 42 | iif.iifP[ptr].object_adjust = g1; \ |
| 43 | iif.iifP[ptr].pcrel = i1; \ |
| 44 | iif.iifP[ptr].pcrel_adjust = k1; \ |
| 45 | iif.iifP[ptr].im_disp = m1; \ |
| 46 | iif.iifP[ptr].relax_substate = o1; \ |
| 47 | iif.iifP[ptr].bit_fixP = q1; \ |
| 48 | iif.iifP[ptr].addr_mode = s1; \ |
| 49 | iif.iifP[ptr].bsr = u1; |
| 50 | |
| 51 | #ifdef SEQUENT_COMPATABILITY |
| 52 | #define LINE_COMMENT_CHARS "|" |
| 53 | #define ABSOLUTE_PREFIX '@' |
| 54 | #define IMMEDIATE_PREFIX '#' |
| 55 | #endif |
| 56 | |
| 57 | #ifndef LINE_COMMENT_CHARS |
| 58 | #define LINE_COMMENT_CHARS "#" |
| 59 | #endif |
| 60 | |
| 61 | const char comment_chars[] = "#"; |
| 62 | const char line_comment_chars[] = LINE_COMMENT_CHARS; |
| 63 | const char line_separator_chars[] = ";"; |
| 64 | static int default_disp_size = 4; /* Displacement size for external refs. */ |
| 65 | |
| 66 | #if !defined(ABSOLUTE_PREFIX) && !defined(IMMEDIATE_PREFIX) |
| 67 | #define ABSOLUTE_PREFIX '@' /* One or the other MUST be defined. */ |
| 68 | #endif |
| 69 | |
| 70 | struct addr_mode |
| 71 | { |
| 72 | signed char mode; /* Addressing mode of operand (0-31). */ |
| 73 | signed char scaled_mode; /* Mode combined with scaled mode. */ |
| 74 | char scaled_reg; /* Register used in scaled+1 (1-8). */ |
| 75 | char float_flag; /* Set if R0..R7 was F0..F7 ie a |
| 76 | floating-point-register. */ |
| 77 | char am_size; /* Estimated max size of general addr-mode |
| 78 | parts. */ |
| 79 | char im_disp; /* If im_disp==1 we have a displacement. */ |
| 80 | char pcrel; /* 1 if pcrel, this is really redundant info. */ |
| 81 | char disp_suffix[2]; /* Length of displacement(s), 0=undefined. */ |
| 82 | char *disp[2]; /* Pointer(s) at displacement(s) |
| 83 | or immediates(s) (ascii). */ |
| 84 | char index_byte; /* Index byte. */ |
| 85 | }; |
| 86 | typedef struct addr_mode addr_modeS; |
| 87 | |
| 88 | char *freeptr, *freeptr_static; /* Points at some number of free bytes. */ |
| 89 | struct hash_control *inst_hash_handle; |
| 90 | |
| 91 | struct ns32k_opcode *desc; /* Pointer at description of instruction. */ |
| 92 | addr_modeS addr_modeP; |
| 93 | const char EXP_CHARS[] = "eE"; |
| 94 | const char FLT_CHARS[] = "fd"; /* We don't want to support lowercase, |
| 95 | do we? */ |
| 96 | |
| 97 | /* UPPERCASE denotes live names when an instruction is built, IIF is |
| 98 | used as an intermediate form to store the actual parts of the |
| 99 | instruction. A ns32k machine instruction can be divided into a |
| 100 | couple of sub PARTs. When an instruction is assembled the |
| 101 | appropriate PART get an assignment. When an IIF has been completed |
| 102 | it is converted to a FRAGment as specified in AS.H. */ |
| 103 | |
| 104 | /* Internal structs. */ |
| 105 | struct ns32k_option |
| 106 | { |
| 107 | char *pattern; |
| 108 | unsigned long or; |
| 109 | unsigned long and; |
| 110 | }; |
| 111 | |
| 112 | typedef struct |
| 113 | { |
| 114 | int type; /* How to interpret object. */ |
| 115 | int size; /* Estimated max size of object. */ |
| 116 | unsigned long object; /* Binary data. */ |
| 117 | int object_adjust; /* Number added to object. */ |
| 118 | int pcrel; /* True if object is pcrel. */ |
| 119 | int pcrel_adjust; /* Length in bytes from the instruction |
| 120 | start to the displacement. */ |
| 121 | int im_disp; /* True if the object is a displacement. */ |
| 122 | relax_substateT relax_substate;/*Initial relaxsubstate. */ |
| 123 | bit_fixS *bit_fixP; /* Pointer at bit_fix struct. */ |
| 124 | int addr_mode; /* What addrmode do we associate with this |
| 125 | iif-entry. */ |
| 126 | char bsr; /* Sequent hack. */ |
| 127 | } iif_entryT; /* Internal Instruction Format. */ |
| 128 | |
| 129 | struct int_ins_form |
| 130 | { |
| 131 | int instr_size; /* Max size of instruction in bytes. */ |
| 132 | iif_entryT iifP[IIF_ENTRIES + 1]; |
| 133 | }; |
| 134 | |
| 135 | struct int_ins_form iif; |
| 136 | expressionS exprP; |
| 137 | char *input_line_pointer; |
| 138 | |
| 139 | /* Description of the PARTs in IIF |
| 140 | object[n]: |
| 141 | 0 total length in bytes of entries in iif |
| 142 | 1 opcode |
| 143 | 2 index_byte_a |
| 144 | 3 index_byte_b |
| 145 | 4 disp_a_1 |
| 146 | 5 disp_a_2 |
| 147 | 6 disp_b_1 |
| 148 | 7 disp_b_2 |
| 149 | 8 imm_a |
| 150 | 9 imm_b |
| 151 | 10 implied1 |
| 152 | 11 implied2 |
| 153 | |
| 154 | For every entry there is a datalength in bytes. This is stored in size[n]. |
| 155 | 0, the objectlength is not explicitly given by the instruction |
| 156 | and the operand is undefined. This is a case for relaxation. |
| 157 | Reserve 4 bytes for the final object. |
| 158 | |
| 159 | 1, the entry contains one byte |
| 160 | 2, the entry contains two bytes |
| 161 | 3, the entry contains three bytes |
| 162 | 4, the entry contains four bytes |
| 163 | etc |
| 164 | |
| 165 | Furthermore, every entry has a data type identifier in type[n]. |
| 166 | |
| 167 | 0, the entry is void, ignore it. |
| 168 | 1, the entry is a binary number. |
| 169 | 2, the entry is a pointer at an expression. |
| 170 | Where expression may be as simple as a single '1', |
| 171 | and as complicated as foo-bar+12, |
| 172 | foo and bar may be undefined but suffixed by :{b|w|d} to |
| 173 | control the length of the object. |
| 174 | |
| 175 | 3, the entry is a pointer at a bignum struct |
| 176 | |
| 177 | The low-order-byte corresponds to low physical memory. |
| 178 | Obviously a FRAGment must be created for each valid disp in PART whose |
| 179 | datalength is undefined (to bad) . |
| 180 | The case where just the expression is undefined is less severe and is |
| 181 | handled by fix. Here the number of bytes in the objectfile is known. |
| 182 | With this representation we simplify the assembly and separates the |
| 183 | machine dependent/independent parts in a more clean way (said OE). */ |
| 184 | \f |
| 185 | struct ns32k_option opt1[] = /* restore, exit. */ |
| 186 | { |
| 187 | {"r0", 0x80, 0xff}, |
| 188 | {"r1", 0x40, 0xff}, |
| 189 | {"r2", 0x20, 0xff}, |
| 190 | {"r3", 0x10, 0xff}, |
| 191 | {"r4", 0x08, 0xff}, |
| 192 | {"r5", 0x04, 0xff}, |
| 193 | {"r6", 0x02, 0xff}, |
| 194 | {"r7", 0x01, 0xff}, |
| 195 | {0, 0x00, 0xff} |
| 196 | }; |
| 197 | struct ns32k_option opt2[] = /* save, enter. */ |
| 198 | { |
| 199 | {"r0", 0x01, 0xff}, |
| 200 | {"r1", 0x02, 0xff}, |
| 201 | {"r2", 0x04, 0xff}, |
| 202 | {"r3", 0x08, 0xff}, |
| 203 | {"r4", 0x10, 0xff}, |
| 204 | {"r5", 0x20, 0xff}, |
| 205 | {"r6", 0x40, 0xff}, |
| 206 | {"r7", 0x80, 0xff}, |
| 207 | {0, 0x00, 0xff} |
| 208 | }; |
| 209 | struct ns32k_option opt3[] = /* setcfg. */ |
| 210 | { |
| 211 | {"c", 0x8, 0xff}, |
| 212 | {"m", 0x4, 0xff}, |
| 213 | {"f", 0x2, 0xff}, |
| 214 | {"i", 0x1, 0xff}, |
| 215 | {0, 0x0, 0xff} |
| 216 | }; |
| 217 | struct ns32k_option opt4[] = /* cinv. */ |
| 218 | { |
| 219 | {"a", 0x4, 0xff}, |
| 220 | {"i", 0x2, 0xff}, |
| 221 | {"d", 0x1, 0xff}, |
| 222 | {0, 0x0, 0xff} |
| 223 | }; |
| 224 | struct ns32k_option opt5[] = /* String inst. */ |
| 225 | { |
| 226 | {"b", 0x2, 0xff}, |
| 227 | {"u", 0xc, 0xff}, |
| 228 | {"w", 0x4, 0xff}, |
| 229 | {0, 0x0, 0xff} |
| 230 | }; |
| 231 | struct ns32k_option opt6[] = /* Plain reg ext,cvtp etc. */ |
| 232 | { |
| 233 | {"r0", 0x00, 0xff}, |
| 234 | {"r1", 0x01, 0xff}, |
| 235 | {"r2", 0x02, 0xff}, |
| 236 | {"r3", 0x03, 0xff}, |
| 237 | {"r4", 0x04, 0xff}, |
| 238 | {"r5", 0x05, 0xff}, |
| 239 | {"r6", 0x06, 0xff}, |
| 240 | {"r7", 0x07, 0xff}, |
| 241 | {0, 0x00, 0xff} |
| 242 | }; |
| 243 | |
| 244 | #if !defined(NS32032) && !defined(NS32532) |
| 245 | #define NS32532 |
| 246 | #endif |
| 247 | |
| 248 | struct ns32k_option cpureg_532[] = /* lpr spr. */ |
| 249 | { |
| 250 | {"us", 0x0, 0xff}, |
| 251 | {"dcr", 0x1, 0xff}, |
| 252 | {"bpc", 0x2, 0xff}, |
| 253 | {"dsr", 0x3, 0xff}, |
| 254 | {"car", 0x4, 0xff}, |
| 255 | {"fp", 0x8, 0xff}, |
| 256 | {"sp", 0x9, 0xff}, |
| 257 | {"sb", 0xa, 0xff}, |
| 258 | {"usp", 0xb, 0xff}, |
| 259 | {"cfg", 0xc, 0xff}, |
| 260 | {"psr", 0xd, 0xff}, |
| 261 | {"intbase", 0xe, 0xff}, |
| 262 | {"mod", 0xf, 0xff}, |
| 263 | {0, 0x00, 0xff} |
| 264 | }; |
| 265 | struct ns32k_option mmureg_532[] = /* lmr smr. */ |
| 266 | { |
| 267 | {"mcr", 0x9, 0xff}, |
| 268 | {"msr", 0xa, 0xff}, |
| 269 | {"tear", 0xb, 0xff}, |
| 270 | {"ptb0", 0xc, 0xff}, |
| 271 | {"ptb1", 0xd, 0xff}, |
| 272 | {"ivar0", 0xe, 0xff}, |
| 273 | {"ivar1", 0xf, 0xff}, |
| 274 | {0, 0x0, 0xff} |
| 275 | }; |
| 276 | |
| 277 | struct ns32k_option cpureg_032[] = /* lpr spr. */ |
| 278 | { |
| 279 | {"upsr", 0x0, 0xff}, |
| 280 | {"fp", 0x8, 0xff}, |
| 281 | {"sp", 0x9, 0xff}, |
| 282 | {"sb", 0xa, 0xff}, |
| 283 | {"psr", 0xd, 0xff}, |
| 284 | {"intbase", 0xe, 0xff}, |
| 285 | {"mod", 0xf, 0xff}, |
| 286 | {0, 0x0, 0xff} |
| 287 | }; |
| 288 | struct ns32k_option mmureg_032[] = /* lmr smr. */ |
| 289 | { |
| 290 | {"bpr0", 0x0, 0xff}, |
| 291 | {"bpr1", 0x1, 0xff}, |
| 292 | {"pf0", 0x4, 0xff}, |
| 293 | {"pf1", 0x5, 0xff}, |
| 294 | {"sc", 0x8, 0xff}, |
| 295 | {"msr", 0xa, 0xff}, |
| 296 | {"bcnt", 0xb, 0xff}, |
| 297 | {"ptb0", 0xc, 0xff}, |
| 298 | {"ptb1", 0xd, 0xff}, |
| 299 | {"eia", 0xf, 0xff}, |
| 300 | {0, 0x0, 0xff} |
| 301 | }; |
| 302 | |
| 303 | #if defined(NS32532) |
| 304 | struct ns32k_option *cpureg = cpureg_532; |
| 305 | struct ns32k_option *mmureg = mmureg_532; |
| 306 | #else |
| 307 | struct ns32k_option *cpureg = cpureg_032; |
| 308 | struct ns32k_option *mmureg = mmureg_032; |
| 309 | #endif |
| 310 | \f |
| 311 | |
| 312 | const pseudo_typeS md_pseudo_table[] = |
| 313 | { /* So far empty. */ |
| 314 | {0, 0, 0} |
| 315 | }; |
| 316 | |
| 317 | #define IND(x,y) (((x)<<2)+(y)) |
| 318 | |
| 319 | /* Those are index's to relax groups in md_relax_table ie it must be |
| 320 | multiplied by 4 to point at a group start. Viz IND(x,y) Se function |
| 321 | relax_segment in write.c for more info. */ |
| 322 | |
| 323 | #define BRANCH 1 |
| 324 | #define PCREL 2 |
| 325 | |
| 326 | /* Those are index's to entries in a relax group. */ |
| 327 | |
| 328 | #define BYTE 0 |
| 329 | #define WORD 1 |
| 330 | #define DOUBLE 2 |
| 331 | #define UNDEF 3 |
| 332 | /* Those limits are calculated from the displacement start in memory. |
| 333 | The ns32k uses the beginning of the instruction as displacement |
| 334 | base. This type of displacements could be handled here by moving |
| 335 | the limit window up or down. I choose to use an internal |
| 336 | displacement base-adjust as there are other routines that must |
| 337 | consider this. Also, as we have two various offset-adjusts in the |
| 338 | ns32k (acb versus br/brs/jsr/bcond), two set of limits would have |
| 339 | had to be used. Now we dont have to think about that. */ |
| 340 | |
| 341 | const relax_typeS md_relax_table[] = |
| 342 | { |
| 343 | {1, 1, 0, 0}, |
| 344 | {1, 1, 0, 0}, |
| 345 | {1, 1, 0, 0}, |
| 346 | {1, 1, 0, 0}, |
| 347 | |
| 348 | {(63), (-64), 1, IND (BRANCH, WORD)}, |
| 349 | {(8192), (-8192), 2, IND (BRANCH, DOUBLE)}, |
| 350 | {0, 0, 4, 0}, |
| 351 | {1, 1, 0, 0} |
| 352 | }; |
| 353 | |
| 354 | /* Array used to test if mode contains displacements. |
| 355 | Value is true if mode contains displacement. */ |
| 356 | |
| 357 | char disp_test[] = |
| 358 | {0, 0, 0, 0, 0, 0, 0, 0, |
| 359 | 1, 1, 1, 1, 1, 1, 1, 1, |
| 360 | 1, 1, 1, 0, 0, 1, 1, 0, |
| 361 | 1, 1, 1, 1, 1, 1, 1, 1}; |
| 362 | |
| 363 | /* Array used to calculate max size of displacements. */ |
| 364 | |
| 365 | char disp_size[] = |
| 366 | {4, 1, 2, 0, 4}; |
| 367 | \f |
| 368 | /* Parse a general operand into an addressingmode struct |
| 369 | |
| 370 | In: pointer at operand in ascii form |
| 371 | pointer at addr_mode struct for result |
| 372 | the level of recursion. (always 0 or 1) |
| 373 | |
| 374 | Out: data in addr_mode struct. */ |
| 375 | |
| 376 | static int |
| 377 | addr_mode (char *operand, |
| 378 | addr_modeS *addrmodeP, |
| 379 | int recursive_level) |
| 380 | { |
| 381 | char *str; |
| 382 | int i; |
| 383 | int strl; |
| 384 | int mode; |
| 385 | int j; |
| 386 | |
| 387 | mode = DEFAULT; /* Default. */ |
| 388 | addrmodeP->scaled_mode = 0; /* Why not. */ |
| 389 | addrmodeP->scaled_reg = 0; /* If 0, not scaled index. */ |
| 390 | addrmodeP->float_flag = 0; |
| 391 | addrmodeP->am_size = 0; |
| 392 | addrmodeP->im_disp = 0; |
| 393 | addrmodeP->pcrel = 0; /* Not set in this function. */ |
| 394 | addrmodeP->disp_suffix[0] = 0; |
| 395 | addrmodeP->disp_suffix[1] = 0; |
| 396 | addrmodeP->disp[0] = NULL; |
| 397 | addrmodeP->disp[1] = NULL; |
| 398 | str = operand; |
| 399 | |
| 400 | if (str[0] == 0) |
| 401 | return 0; |
| 402 | |
| 403 | strl = strlen (str); |
| 404 | |
| 405 | switch (str[0]) |
| 406 | { |
| 407 | /* The following three case statements controls the mode-chars |
| 408 | this is the place to ed if you want to change them. */ |
| 409 | #ifdef ABSOLUTE_PREFIX |
| 410 | case ABSOLUTE_PREFIX: |
| 411 | if (str[strl - 1] == ']') |
| 412 | break; |
| 413 | addrmodeP->mode = 21; /* absolute */ |
| 414 | addrmodeP->disp[0] = str + 1; |
| 415 | return -1; |
| 416 | #endif |
| 417 | #ifdef IMMEDIATE_PREFIX |
| 418 | case IMMEDIATE_PREFIX: |
| 419 | if (str[strl - 1] == ']') |
| 420 | break; |
| 421 | addrmodeP->mode = 20; /* immediate */ |
| 422 | addrmodeP->disp[0] = str + 1; |
| 423 | return -1; |
| 424 | #endif |
| 425 | case '.': |
| 426 | if (str[strl - 1] != ']') |
| 427 | { |
| 428 | switch (str[1]) |
| 429 | { |
| 430 | case '-': |
| 431 | case '+': |
| 432 | if (str[2] != '\000') |
| 433 | { |
| 434 | addrmodeP->mode = 27; /* pc-relative */ |
| 435 | addrmodeP->disp[0] = str + 2; |
| 436 | return -1; |
| 437 | } |
| 438 | default: |
| 439 | as_bad (_("Invalid syntax in PC-relative addressing mode")); |
| 440 | return 0; |
| 441 | } |
| 442 | } |
| 443 | break; |
| 444 | case 'e': |
| 445 | if (str[strl - 1] != ']') |
| 446 | { |
| 447 | if ((!strncmp (str, "ext(", 4)) && strl > 7) |
| 448 | { /* external */ |
| 449 | addrmodeP->disp[0] = str + 4; |
| 450 | i = 0; |
| 451 | j = 2; |
| 452 | do |
| 453 | { /* disp[0]'s termination point. */ |
| 454 | j += 1; |
| 455 | if (str[j] == '(') |
| 456 | i++; |
| 457 | if (str[j] == ')') |
| 458 | i--; |
| 459 | } |
| 460 | while (j < strl && i != 0); |
| 461 | if (i != 0 || !(str[j + 1] == '-' || str[j + 1] == '+')) |
| 462 | { |
| 463 | as_bad (_("Invalid syntax in External addressing mode")); |
| 464 | return (0); |
| 465 | } |
| 466 | str[j] = '\000'; /* null terminate disp[0] */ |
| 467 | addrmodeP->disp[1] = str + j + 2; |
| 468 | addrmodeP->mode = 22; |
| 469 | return -1; |
| 470 | } |
| 471 | } |
| 472 | break; |
| 473 | |
| 474 | default: |
| 475 | ; |
| 476 | } |
| 477 | |
| 478 | strl = strlen (str); |
| 479 | |
| 480 | switch (strl) |
| 481 | { |
| 482 | case 2: |
| 483 | switch (str[0]) |
| 484 | { |
| 485 | case 'f': |
| 486 | addrmodeP->float_flag = 1; |
| 487 | /* Drop through. */ |
| 488 | case 'r': |
| 489 | if (str[1] >= '0' && str[1] < '8') |
| 490 | { |
| 491 | addrmodeP->mode = str[1] - '0'; |
| 492 | return -1; |
| 493 | } |
| 494 | break; |
| 495 | default: |
| 496 | break; |
| 497 | } |
| 498 | /* Drop through. */ |
| 499 | |
| 500 | case 3: |
| 501 | if (!strncmp (str, "tos", 3)) |
| 502 | { |
| 503 | addrmodeP->mode = 23; /* TopOfStack */ |
| 504 | return -1; |
| 505 | } |
| 506 | break; |
| 507 | |
| 508 | default: |
| 509 | break; |
| 510 | } |
| 511 | |
| 512 | if (strl > 4) |
| 513 | { |
| 514 | if (str[strl - 1] == ')') |
| 515 | { |
| 516 | if (str[strl - 2] == ')') |
| 517 | { |
| 518 | if (!strncmp (&str[strl - 5], "(fp", 3)) |
| 519 | mode = 16; /* Memory Relative. */ |
| 520 | else if (!strncmp (&str[strl - 5], "(sp", 3)) |
| 521 | mode = 17; |
| 522 | else if (!strncmp (&str[strl - 5], "(sb", 3)) |
| 523 | mode = 18; |
| 524 | |
| 525 | if (mode != DEFAULT) |
| 526 | { |
| 527 | /* Memory relative. */ |
| 528 | addrmodeP->mode = mode; |
| 529 | j = strl - 5; /* Temp for end of disp[0]. */ |
| 530 | i = 0; |
| 531 | |
| 532 | do |
| 533 | { |
| 534 | strl -= 1; |
| 535 | if (str[strl] == ')') |
| 536 | i++; |
| 537 | if (str[strl] == '(') |
| 538 | i--; |
| 539 | } |
| 540 | while (strl > -1 && i != 0); |
| 541 | |
| 542 | if (i != 0) |
| 543 | { |
| 544 | as_bad (_("Invalid syntax in Memory Relative addressing mode")); |
| 545 | return (0); |
| 546 | } |
| 547 | |
| 548 | addrmodeP->disp[1] = str; |
| 549 | addrmodeP->disp[0] = str + strl + 1; |
| 550 | str[j] = '\000'; /* Null terminate disp[0] . */ |
| 551 | str[strl] = '\000'; /* Null terminate disp[1]. */ |
| 552 | |
| 553 | return -1; |
| 554 | } |
| 555 | } |
| 556 | |
| 557 | switch (str[strl - 3]) |
| 558 | { |
| 559 | case 'r': |
| 560 | case 'R': |
| 561 | if (str[strl - 2] >= '0' |
| 562 | && str[strl - 2] < '8' |
| 563 | && str[strl - 4] == '(') |
| 564 | { |
| 565 | addrmodeP->mode = str[strl - 2] - '0' + 8; |
| 566 | addrmodeP->disp[0] = str; |
| 567 | str[strl - 4] = 0; |
| 568 | return -1; /* reg rel */ |
| 569 | } |
| 570 | /* Drop through. */ |
| 571 | |
| 572 | default: |
| 573 | if (!strncmp (&str[strl - 4], "(fp", 3)) |
| 574 | mode = 24; |
| 575 | else if (!strncmp (&str[strl - 4], "(sp", 3)) |
| 576 | mode = 25; |
| 577 | else if (!strncmp (&str[strl - 4], "(sb", 3)) |
| 578 | mode = 26; |
| 579 | else if (!strncmp (&str[strl - 4], "(pc", 3)) |
| 580 | mode = 27; |
| 581 | |
| 582 | if (mode != DEFAULT) |
| 583 | { |
| 584 | addrmodeP->mode = mode; |
| 585 | addrmodeP->disp[0] = str; |
| 586 | str[strl - 4] = '\0'; |
| 587 | |
| 588 | return -1; /* Memory space. */ |
| 589 | } |
| 590 | } |
| 591 | } |
| 592 | |
| 593 | /* No trailing ')' do we have a ']' ? */ |
| 594 | if (str[strl - 1] == ']') |
| 595 | { |
| 596 | switch (str[strl - 2]) |
| 597 | { |
| 598 | case 'b': |
| 599 | mode = 28; |
| 600 | break; |
| 601 | case 'w': |
| 602 | mode = 29; |
| 603 | break; |
| 604 | case 'd': |
| 605 | mode = 30; |
| 606 | break; |
| 607 | case 'q': |
| 608 | mode = 31; |
| 609 | break; |
| 610 | default: |
| 611 | as_bad (_("Invalid scaled-indexed mode, use (b,w,d,q)")); |
| 612 | |
| 613 | if (str[strl - 3] != ':' || str[strl - 6] != '[' |
| 614 | || str[strl - 5] == 'r' || str[strl - 4] < '0' |
| 615 | || str[strl - 4] > '7') |
| 616 | as_bad (_("Syntax in scaled-indexed mode, use [Rn:m] where n=[0..7] m={b,w,d,q}")); |
| 617 | } /* Scaled index. */ |
| 618 | |
| 619 | if (recursive_level > 0) |
| 620 | { |
| 621 | as_bad (_("Scaled-indexed addressing mode combined with scaled-index")); |
| 622 | return 0; |
| 623 | } |
| 624 | |
| 625 | addrmodeP->am_size += 1; /* scaled index byte. */ |
| 626 | j = str[strl - 4] - '0'; /* store temporary. */ |
| 627 | str[strl - 6] = '\000'; /* nullterminate for recursive call. */ |
| 628 | i = addr_mode (str, addrmodeP, 1); |
| 629 | |
| 630 | if (!i || addrmodeP->mode == 20) |
| 631 | { |
| 632 | as_bad (_("Invalid or illegal addressing mode combined with scaled-index")); |
| 633 | return 0; |
| 634 | } |
| 635 | |
| 636 | addrmodeP->scaled_mode = addrmodeP->mode; /* Store the inferior mode. */ |
| 637 | addrmodeP->mode = mode; |
| 638 | addrmodeP->scaled_reg = j + 1; |
| 639 | |
| 640 | return -1; |
| 641 | } |
| 642 | } |
| 643 | |
| 644 | addrmodeP->mode = DEFAULT; /* Default to whatever. */ |
| 645 | addrmodeP->disp[0] = str; |
| 646 | |
| 647 | return -1; |
| 648 | } |
| 649 | \f |
| 650 | static void |
| 651 | evaluate_expr (expressionS *resultP, char *ptr) |
| 652 | { |
| 653 | char *tmp_line; |
| 654 | |
| 655 | tmp_line = input_line_pointer; |
| 656 | input_line_pointer = ptr; |
| 657 | expression (resultP); |
| 658 | input_line_pointer = tmp_line; |
| 659 | } |
| 660 | |
| 661 | /* ptr points at string addr_modeP points at struct with result This |
| 662 | routine calls addr_mode to determine the general addr.mode of the |
| 663 | operand. When this is ready it parses the displacements for size |
| 664 | specifying suffixes and determines size of immediate mode via |
| 665 | ns32k-opcode. Also builds index bytes if needed. */ |
| 666 | |
| 667 | static int |
| 668 | get_addr_mode (char *ptr, addr_modeS *addrmodeP) |
| 669 | { |
| 670 | int tmp; |
| 671 | |
| 672 | addr_mode (ptr, addrmodeP, 0); |
| 673 | |
| 674 | if (addrmodeP->mode == DEFAULT || addrmodeP->scaled_mode == -1) |
| 675 | { |
| 676 | /* Resolve ambiguous operands, this shouldn't be necessary if |
| 677 | one uses standard NSC operand syntax. But the sequent |
| 678 | compiler doesn't!!! This finds a proper addressing mode |
| 679 | if it is implicitly stated. See ns32k-opcode.h. */ |
| 680 | (void) evaluate_expr (&exprP, ptr); /* This call takes time Sigh! */ |
| 681 | |
| 682 | if (addrmodeP->mode == DEFAULT) |
| 683 | { |
| 684 | if (exprP.X_add_symbol || exprP.X_op_symbol) |
| 685 | addrmodeP->mode = desc->default_model; /* We have a label. */ |
| 686 | else |
| 687 | addrmodeP->mode = desc->default_modec; /* We have a constant. */ |
| 688 | } |
| 689 | else |
| 690 | { |
| 691 | if (exprP.X_add_symbol || exprP.X_op_symbol) |
| 692 | addrmodeP->scaled_mode = desc->default_model; |
| 693 | else |
| 694 | addrmodeP->scaled_mode = desc->default_modec; |
| 695 | } |
| 696 | |
| 697 | /* Must put this mess down in addr_mode to handle the scaled |
| 698 | case better. */ |
| 699 | } |
| 700 | |
| 701 | /* It appears as the sequent compiler wants an absolute when we have |
| 702 | a label without @. Constants becomes immediates besides the addr |
| 703 | case. Think it does so with local labels too, not optimum, pcrel |
| 704 | is better. When I have time I will make gas check this and |
| 705 | select pcrel when possible Actually that is trivial. */ |
| 706 | if ((tmp = addrmodeP->scaled_reg)) |
| 707 | { /* Build indexbyte. */ |
| 708 | tmp--; /* Remember regnumber comes incremented for |
| 709 | flagpurpose. */ |
| 710 | tmp |= addrmodeP->scaled_mode << 3; |
| 711 | addrmodeP->index_byte = (char) tmp; |
| 712 | addrmodeP->am_size += 1; |
| 713 | } |
| 714 | |
| 715 | gas_assert (addrmodeP->mode >= 0); |
| 716 | if (disp_test[(unsigned int) addrmodeP->mode]) |
| 717 | { |
| 718 | char c; |
| 719 | char suffix; |
| 720 | char suffix_sub; |
| 721 | int i; |
| 722 | char *toP; |
| 723 | char *fromP; |
| 724 | |
| 725 | /* There was a displacement, probe for length specifying suffix. */ |
| 726 | addrmodeP->pcrel = 0; |
| 727 | |
| 728 | gas_assert (addrmodeP->mode >= 0); |
| 729 | if (disp_test[(unsigned int) addrmodeP->mode]) |
| 730 | { |
| 731 | /* There is a displacement. */ |
| 732 | if (addrmodeP->mode == 27 || addrmodeP->scaled_mode == 27) |
| 733 | /* Do we have pcrel. mode. */ |
| 734 | addrmodeP->pcrel = 1; |
| 735 | |
| 736 | addrmodeP->im_disp = 1; |
| 737 | |
| 738 | for (i = 0; i < 2; i++) |
| 739 | { |
| 740 | suffix_sub = suffix = 0; |
| 741 | |
| 742 | if ((toP = addrmodeP->disp[i])) |
| 743 | { |
| 744 | /* Suffix of expression, the largest size rules. */ |
| 745 | fromP = toP; |
| 746 | |
| 747 | while ((c = *fromP++)) |
| 748 | { |
| 749 | *toP++ = c; |
| 750 | if (c == ':') |
| 751 | { |
| 752 | switch (*fromP) |
| 753 | { |
| 754 | case '\0': |
| 755 | as_warn (_("Premature end of suffix -- Defaulting to d")); |
| 756 | suffix = 4; |
| 757 | continue; |
| 758 | case 'b': |
| 759 | suffix_sub = 1; |
| 760 | break; |
| 761 | case 'w': |
| 762 | suffix_sub = 2; |
| 763 | break; |
| 764 | case 'd': |
| 765 | suffix_sub = 4; |
| 766 | break; |
| 767 | default: |
| 768 | as_warn (_("Bad suffix after ':' use {b|w|d} Defaulting to d")); |
| 769 | suffix = 4; |
| 770 | } |
| 771 | |
| 772 | fromP ++; |
| 773 | toP --; /* So we write over the ':' */ |
| 774 | |
| 775 | if (suffix < suffix_sub) |
| 776 | suffix = suffix_sub; |
| 777 | } |
| 778 | } |
| 779 | |
| 780 | *toP = '\0'; /* Terminate properly. */ |
| 781 | addrmodeP->disp_suffix[i] = suffix; |
| 782 | addrmodeP->am_size += suffix ? suffix : 4; |
| 783 | } |
| 784 | } |
| 785 | } |
| 786 | } |
| 787 | else |
| 788 | { |
| 789 | if (addrmodeP->mode == 20) |
| 790 | { |
| 791 | /* Look in ns32k_opcode for size. */ |
| 792 | addrmodeP->disp_suffix[0] = addrmodeP->am_size = desc->im_size; |
| 793 | addrmodeP->im_disp = 0; |
| 794 | } |
| 795 | } |
| 796 | |
| 797 | return addrmodeP->mode; |
| 798 | } |
| 799 | |
| 800 | /* Read an optionlist. */ |
| 801 | |
| 802 | static void |
| 803 | optlist (char *str, /* The string to extract options from. */ |
| 804 | struct ns32k_option *optionP, /* How to search the string. */ |
| 805 | unsigned long *default_map) /* Default pattern and output. */ |
| 806 | { |
| 807 | int i, j, k, strlen1, strlen2; |
| 808 | char *patternP, *strP; |
| 809 | |
| 810 | strlen1 = strlen (str); |
| 811 | |
| 812 | if (strlen1 < 1) |
| 813 | as_fatal (_("Very short instr to option, ie you can't do it on a NULLstr")); |
| 814 | |
| 815 | for (i = 0; optionP[i].pattern != 0; i++) |
| 816 | { |
| 817 | strlen2 = strlen (optionP[i].pattern); |
| 818 | |
| 819 | for (j = 0; j < strlen1; j++) |
| 820 | { |
| 821 | patternP = optionP[i].pattern; |
| 822 | strP = &str[j]; |
| 823 | |
| 824 | for (k = 0; k < strlen2; k++) |
| 825 | { |
| 826 | if (*(strP++) != *(patternP++)) |
| 827 | break; |
| 828 | } |
| 829 | |
| 830 | if (k == strlen2) |
| 831 | { /* match */ |
| 832 | *default_map |= optionP[i].or; |
| 833 | *default_map &= optionP[i].and; |
| 834 | } |
| 835 | } |
| 836 | } |
| 837 | } |
| 838 | |
| 839 | /* Search struct for symbols. |
| 840 | This function is used to get the short integer form of reg names in |
| 841 | the instructions lmr, smr, lpr, spr return true if str is found in |
| 842 | list. */ |
| 843 | |
| 844 | static int |
| 845 | list_search (char *str, /* The string to match. */ |
| 846 | struct ns32k_option *optionP, /* List to search. */ |
| 847 | unsigned long *default_map) /* Default pattern and output. */ |
| 848 | { |
| 849 | int i; |
| 850 | |
| 851 | for (i = 0; optionP[i].pattern != 0; i++) |
| 852 | { |
| 853 | if (!strncmp (optionP[i].pattern, str, 20)) |
| 854 | { |
| 855 | /* Use strncmp to be safe. */ |
| 856 | *default_map |= optionP[i].or; |
| 857 | *default_map &= optionP[i].and; |
| 858 | |
| 859 | return -1; |
| 860 | } |
| 861 | } |
| 862 | |
| 863 | as_bad (_("No such entry in list. (cpu/mmu register)")); |
| 864 | return 0; |
| 865 | } |
| 866 | \f |
| 867 | /* Create a bit_fixS in obstack 'notes'. |
| 868 | This struct is used to profile the normal fix. If the bit_fixP is a |
| 869 | valid pointer (not NULL) the bit_fix data will be used to format |
| 870 | the fix. */ |
| 871 | |
| 872 | static bit_fixS * |
| 873 | bit_fix_new (int size, /* Length of bitfield. */ |
| 874 | int offset, /* Bit offset to bitfield. */ |
| 875 | long min, /* Signextended min for bitfield. */ |
| 876 | long max, /* Signextended max for bitfield. */ |
| 877 | long add, /* Add mask, used for huffman prefix. */ |
| 878 | long base_type, /* 0 or 1, if 1 it's exploded to opcode ptr. */ |
| 879 | long base_adj) |
| 880 | { |
| 881 | bit_fixS *bit_fixP; |
| 882 | |
| 883 | bit_fixP = obstack_alloc (¬es, sizeof (bit_fixS)); |
| 884 | |
| 885 | bit_fixP->fx_bit_size = size; |
| 886 | bit_fixP->fx_bit_offset = offset; |
| 887 | bit_fixP->fx_bit_base = base_type; |
| 888 | bit_fixP->fx_bit_base_adj = base_adj; |
| 889 | bit_fixP->fx_bit_max = max; |
| 890 | bit_fixP->fx_bit_min = min; |
| 891 | bit_fixP->fx_bit_add = add; |
| 892 | |
| 893 | return bit_fixP; |
| 894 | } |
| 895 | |
| 896 | /* Convert operands to iif-format and adds bitfields to the opcode. |
| 897 | Operands are parsed in such an order that the opcode is updated from |
| 898 | its most significant bit, that is when the operand need to alter the |
| 899 | opcode. |
| 900 | Be careful not to put to objects in the same iif-slot. */ |
| 901 | |
| 902 | static void |
| 903 | encode_operand (int argc, |
| 904 | char **argv, |
| 905 | const char *operandsP, |
| 906 | const char *suffixP, |
| 907 | char im_size ATTRIBUTE_UNUSED, |
| 908 | char opcode_bit_ptr) |
| 909 | { |
| 910 | int i, j; |
| 911 | char d; |
| 912 | int pcrel, b, loop, pcrel_adjust; |
| 913 | unsigned long tmp; |
| 914 | |
| 915 | for (loop = 0; loop < argc; loop++) |
| 916 | { |
| 917 | /* What operand are we supposed to work on. */ |
| 918 | i = operandsP[loop << 1] - '1'; |
| 919 | if (i > 3) |
| 920 | as_fatal (_("Internal consistency error. check ns32k-opcode.h")); |
| 921 | |
| 922 | pcrel = 0; |
| 923 | pcrel_adjust = 0; |
| 924 | tmp = 0; |
| 925 | |
| 926 | switch ((d = operandsP[(loop << 1) + 1])) |
| 927 | { |
| 928 | case 'f': /* Operand of sfsr turns out to be a nasty |
| 929 | specialcase. */ |
| 930 | opcode_bit_ptr -= 5; |
| 931 | case 'Z': /* Float not immediate. */ |
| 932 | case 'F': /* 32 bit float general form. */ |
| 933 | case 'L': /* 64 bit float. */ |
| 934 | case 'I': /* Integer not immediate. */ |
| 935 | case 'B': /* Byte */ |
| 936 | case 'W': /* Word */ |
| 937 | case 'D': /* Double-word. */ |
| 938 | case 'A': /* Double-word gen-address-form ie no regs |
| 939 | allowed. */ |
| 940 | get_addr_mode (argv[i], &addr_modeP); |
| 941 | |
| 942 | if ((addr_modeP.mode == 20) && |
| 943 | (d == 'I' || d == 'Z' || d == 'A')) |
| 944 | as_fatal (d == 'A'? _("Address of immediate operand"): |
| 945 | _("Invalid immediate write operand.")); |
| 946 | |
| 947 | if (opcode_bit_ptr == desc->opcode_size) |
| 948 | b = 4; |
| 949 | else |
| 950 | b = 6; |
| 951 | |
| 952 | for (j = b; j < (b + 2); j++) |
| 953 | { |
| 954 | if (addr_modeP.disp[j - b]) |
| 955 | { |
| 956 | IIF (j, |
| 957 | 2, |
| 958 | addr_modeP.disp_suffix[j - b], |
| 959 | (unsigned long) addr_modeP.disp[j - b], |
| 960 | 0, |
| 961 | addr_modeP.pcrel, |
| 962 | iif.instr_size, |
| 963 | addr_modeP.im_disp, |
| 964 | IND (BRANCH, BYTE), |
| 965 | NULL, |
| 966 | (addr_modeP.scaled_reg ? addr_modeP.scaled_mode |
| 967 | : addr_modeP.mode), |
| 968 | 0); |
| 969 | } |
| 970 | } |
| 971 | |
| 972 | opcode_bit_ptr -= 5; |
| 973 | iif.iifP[1].object |= ((long) addr_modeP.mode) << opcode_bit_ptr; |
| 974 | |
| 975 | if (addr_modeP.scaled_reg) |
| 976 | { |
| 977 | j = b / 2; |
| 978 | IIF (j, 1, 1, (unsigned long) addr_modeP.index_byte, |
| 979 | 0, 0, 0, 0, 0, NULL, -1, 0); |
| 980 | } |
| 981 | break; |
| 982 | |
| 983 | case 'b': /* Multiple instruction disp. */ |
| 984 | freeptr++; /* OVE:this is an useful hack. */ |
| 985 | sprintf (freeptr, "((%s-1)*%d)", argv[i], desc->im_size); |
| 986 | argv[i] = freeptr; |
| 987 | pcrel -= 1; /* Make pcrel 0 in spite of what case 'p': |
| 988 | wants. */ |
| 989 | /* fall thru */ |
| 990 | case 'p': /* Displacement - pc relative addressing. */ |
| 991 | pcrel += 1; |
| 992 | /* fall thru */ |
| 993 | case 'd': /* Displacement. */ |
| 994 | iif.instr_size += suffixP[i] ? suffixP[i] : 4; |
| 995 | IIF (12, 2, suffixP[i], (unsigned long) argv[i], 0, |
| 996 | pcrel, pcrel_adjust, 1, IND (BRANCH, BYTE), NULL, -1, 0); |
| 997 | break; |
| 998 | case 'H': /* Sequent-hack: the linker wants a bit set |
| 999 | when bsr. */ |
| 1000 | pcrel = 1; |
| 1001 | iif.instr_size += suffixP[i] ? suffixP[i] : 4; |
| 1002 | IIF (12, 2, suffixP[i], (unsigned long) argv[i], 0, |
| 1003 | pcrel, pcrel_adjust, 1, IND (BRANCH, BYTE), NULL, -1, 1); |
| 1004 | break; |
| 1005 | case 'q': /* quick */ |
| 1006 | opcode_bit_ptr -= 4; |
| 1007 | IIF (11, 2, 42, (unsigned long) argv[i], 0, 0, 0, 0, 0, |
| 1008 | bit_fix_new (4, opcode_bit_ptr, -8, 7, 0, 1, 0), -1, 0); |
| 1009 | break; |
| 1010 | case 'r': /* Register number (3 bits). */ |
| 1011 | list_search (argv[i], opt6, &tmp); |
| 1012 | opcode_bit_ptr -= 3; |
| 1013 | iif.iifP[1].object |= tmp << opcode_bit_ptr; |
| 1014 | break; |
| 1015 | case 'O': /* Setcfg instruction optionslist. */ |
| 1016 | optlist (argv[i], opt3, &tmp); |
| 1017 | opcode_bit_ptr -= 4; |
| 1018 | iif.iifP[1].object |= tmp << 15; |
| 1019 | break; |
| 1020 | case 'C': /* Cinv instruction optionslist. */ |
| 1021 | optlist (argv[i], opt4, &tmp); |
| 1022 | opcode_bit_ptr -= 4; |
| 1023 | iif.iifP[1].object |= tmp << 15; /* Insert the regtype in opcode. */ |
| 1024 | break; |
| 1025 | case 'S': /* String instruction options list. */ |
| 1026 | optlist (argv[i], opt5, &tmp); |
| 1027 | opcode_bit_ptr -= 4; |
| 1028 | iif.iifP[1].object |= tmp << 15; |
| 1029 | break; |
| 1030 | case 'u': |
| 1031 | case 'U': /* Register list. */ |
| 1032 | IIF (10, 1, 1, 0, 0, 0, 0, 0, 0, NULL, -1, 0); |
| 1033 | switch (operandsP[(i << 1) + 1]) |
| 1034 | { |
| 1035 | case 'u': /* Restore, exit. */ |
| 1036 | optlist (argv[i], opt1, &iif.iifP[10].object); |
| 1037 | break; |
| 1038 | case 'U': /* Save, enter. */ |
| 1039 | optlist (argv[i], opt2, &iif.iifP[10].object); |
| 1040 | break; |
| 1041 | } |
| 1042 | iif.instr_size += 1; |
| 1043 | break; |
| 1044 | case 'M': /* MMU register. */ |
| 1045 | list_search (argv[i], mmureg, &tmp); |
| 1046 | opcode_bit_ptr -= 4; |
| 1047 | iif.iifP[1].object |= tmp << opcode_bit_ptr; |
| 1048 | break; |
| 1049 | case 'P': /* CPU register. */ |
| 1050 | list_search (argv[i], cpureg, &tmp); |
| 1051 | opcode_bit_ptr -= 4; |
| 1052 | iif.iifP[1].object |= tmp << opcode_bit_ptr; |
| 1053 | break; |
| 1054 | case 'g': /* Inss exts. */ |
| 1055 | iif.instr_size += 1; /* 1 byte is allocated after the opcode. */ |
| 1056 | IIF (10, 2, 1, |
| 1057 | (unsigned long) argv[i], /* i always 2 here. */ |
| 1058 | 0, 0, 0, 0, 0, |
| 1059 | bit_fix_new (3, 5, 0, 7, 0, 0, 0), /* A bit_fix is targeted to |
| 1060 | the byte. */ |
| 1061 | -1, 0); |
| 1062 | break; |
| 1063 | case 'G': |
| 1064 | IIF (11, 2, 42, |
| 1065 | (unsigned long) argv[i], /* i always 3 here. */ |
| 1066 | 0, 0, 0, 0, 0, |
| 1067 | bit_fix_new (5, 0, 1, 32, -1, 0, -1), -1, 0); |
| 1068 | break; |
| 1069 | case 'i': |
| 1070 | iif.instr_size += 1; |
| 1071 | b = 2 + i; /* Put the extension byte after opcode. */ |
| 1072 | IIF (b, 2, 1, 0, 0, 0, 0, 0, 0, 0, -1, 0); |
| 1073 | break; |
| 1074 | default: |
| 1075 | as_fatal (_("Bad opcode-table-option, check in file ns32k-opcode.h")); |
| 1076 | } |
| 1077 | } |
| 1078 | } |
| 1079 | \f |
| 1080 | /* in: instruction line |
| 1081 | out: internal structure of instruction |
| 1082 | that has been prepared for direct conversion to fragment(s) and |
| 1083 | fixes in a systematical fashion |
| 1084 | Return-value = recursive_level. */ |
| 1085 | /* Build iif of one assembly text line. */ |
| 1086 | |
| 1087 | static int |
| 1088 | parse (const char *line, int recursive_level) |
| 1089 | { |
| 1090 | const char *lineptr; |
| 1091 | char c, suffix_separator; |
| 1092 | int i; |
| 1093 | unsigned int argc; |
| 1094 | int arg_type; |
| 1095 | char sqr, sep; |
| 1096 | char suffix[MAX_ARGS], *argv[MAX_ARGS]; /* No more than 4 operands. */ |
| 1097 | |
| 1098 | if (recursive_level <= 0) |
| 1099 | { |
| 1100 | /* Called from md_assemble. */ |
| 1101 | for (lineptr = line; (*lineptr) != '\0' && (*lineptr) != ' '; lineptr++) |
| 1102 | continue; |
| 1103 | |
| 1104 | c = *lineptr; |
| 1105 | *(char *) lineptr = '\0'; |
| 1106 | |
| 1107 | if (!(desc = (struct ns32k_opcode *) hash_find (inst_hash_handle, line))) |
| 1108 | as_fatal (_("No such opcode")); |
| 1109 | |
| 1110 | *(char *) lineptr = c; |
| 1111 | } |
| 1112 | else |
| 1113 | lineptr = line; |
| 1114 | |
| 1115 | argc = 0; |
| 1116 | |
| 1117 | if (*desc->operands) |
| 1118 | { |
| 1119 | if (*lineptr++ != '\0') |
| 1120 | { |
| 1121 | sqr = '['; |
| 1122 | sep = ','; |
| 1123 | |
| 1124 | while (*lineptr != '\0') |
| 1125 | { |
| 1126 | if (desc->operands[argc << 1]) |
| 1127 | { |
| 1128 | suffix[argc] = 0; |
| 1129 | arg_type = desc->operands[(argc << 1) + 1]; |
| 1130 | |
| 1131 | switch (arg_type) |
| 1132 | { |
| 1133 | case 'd': |
| 1134 | case 'b': |
| 1135 | case 'p': |
| 1136 | case 'H': |
| 1137 | /* The operand is supposed to be a displacement. */ |
| 1138 | /* Hackwarning: do not forget to update the 4 |
| 1139 | cases above when editing ns32k-opcode.h. */ |
| 1140 | suffix_separator = ':'; |
| 1141 | break; |
| 1142 | default: |
| 1143 | /* If this char occurs we loose. */ |
| 1144 | suffix_separator = '\255'; |
| 1145 | break; |
| 1146 | } |
| 1147 | |
| 1148 | suffix[argc] = 0; /* 0 when no ':' is encountered. */ |
| 1149 | argv[argc] = freeptr; |
| 1150 | *freeptr = '\0'; |
| 1151 | |
| 1152 | while ((c = *lineptr) != '\0' && c != sep) |
| 1153 | { |
| 1154 | if (c == sqr) |
| 1155 | { |
| 1156 | if (sqr == '[') |
| 1157 | { |
| 1158 | sqr = ']'; |
| 1159 | sep = '\0'; |
| 1160 | } |
| 1161 | else |
| 1162 | { |
| 1163 | sqr = '['; |
| 1164 | sep = ','; |
| 1165 | } |
| 1166 | } |
| 1167 | |
| 1168 | if (c == suffix_separator) |
| 1169 | { |
| 1170 | /* ':' - label/suffix separator. */ |
| 1171 | switch (lineptr[1]) |
| 1172 | { |
| 1173 | case 'b': |
| 1174 | suffix[argc] = 1; |
| 1175 | break; |
| 1176 | case 'w': |
| 1177 | suffix[argc] = 2; |
| 1178 | break; |
| 1179 | case 'd': |
| 1180 | suffix[argc] = 4; |
| 1181 | break; |
| 1182 | default: |
| 1183 | as_warn (_("Bad suffix, defaulting to d")); |
| 1184 | suffix[argc] = 4; |
| 1185 | if (lineptr[1] == '\0' || lineptr[1] == sep) |
| 1186 | { |
| 1187 | lineptr += 1; |
| 1188 | continue; |
| 1189 | } |
| 1190 | break; |
| 1191 | } |
| 1192 | |
| 1193 | lineptr += 2; |
| 1194 | continue; |
| 1195 | } |
| 1196 | |
| 1197 | *freeptr++ = c; |
| 1198 | lineptr++; |
| 1199 | } |
| 1200 | |
| 1201 | *freeptr++ = '\0'; |
| 1202 | argc += 1; |
| 1203 | |
| 1204 | if (*lineptr == '\0') |
| 1205 | continue; |
| 1206 | |
| 1207 | lineptr += 1; |
| 1208 | } |
| 1209 | else |
| 1210 | as_fatal (_("Too many operands passed to instruction")); |
| 1211 | } |
| 1212 | } |
| 1213 | } |
| 1214 | |
| 1215 | if (argc != strlen (desc->operands) / 2) |
| 1216 | { |
| 1217 | if (strlen (desc->default_args)) |
| 1218 | { |
| 1219 | /* We can apply default, don't goof. */ |
| 1220 | if (parse (desc->default_args, 1) != 1) |
| 1221 | /* Check error in default. */ |
| 1222 | as_fatal (_("Wrong numbers of operands in default, check ns32k-opcodes.h")); |
| 1223 | } |
| 1224 | else |
| 1225 | as_fatal (_("Wrong number of operands")); |
| 1226 | } |
| 1227 | |
| 1228 | for (i = 0; i < IIF_ENTRIES; i++) |
| 1229 | /* Mark all entries as void. */ |
| 1230 | iif.iifP[i].type = 0; |
| 1231 | |
| 1232 | /* Build opcode iif-entry. */ |
| 1233 | iif.instr_size = desc->opcode_size / 8; |
| 1234 | IIF (1, 1, iif.instr_size, desc->opcode_seed, 0, 0, 0, 0, 0, 0, -1, 0); |
| 1235 | |
| 1236 | /* This call encodes operands to iif format. */ |
| 1237 | if (argc) |
| 1238 | encode_operand (argc, argv, &desc->operands[0], |
| 1239 | &suffix[0], desc->im_size, desc->opcode_size); |
| 1240 | |
| 1241 | return recursive_level; |
| 1242 | } |
| 1243 | \f |
| 1244 | /* This functionality should really be in the bfd library. */ |
| 1245 | |
| 1246 | static bfd_reloc_code_real_type |
| 1247 | reloc (int size, int pcrel, int type) |
| 1248 | { |
| 1249 | int length, rel_index; |
| 1250 | bfd_reloc_code_real_type relocs[] = |
| 1251 | { |
| 1252 | BFD_RELOC_NS32K_IMM_8, |
| 1253 | BFD_RELOC_NS32K_IMM_16, |
| 1254 | BFD_RELOC_NS32K_IMM_32, |
| 1255 | BFD_RELOC_NS32K_IMM_8_PCREL, |
| 1256 | BFD_RELOC_NS32K_IMM_16_PCREL, |
| 1257 | BFD_RELOC_NS32K_IMM_32_PCREL, |
| 1258 | |
| 1259 | /* ns32k displacements. */ |
| 1260 | BFD_RELOC_NS32K_DISP_8, |
| 1261 | BFD_RELOC_NS32K_DISP_16, |
| 1262 | BFD_RELOC_NS32K_DISP_32, |
| 1263 | BFD_RELOC_NS32K_DISP_8_PCREL, |
| 1264 | BFD_RELOC_NS32K_DISP_16_PCREL, |
| 1265 | BFD_RELOC_NS32K_DISP_32_PCREL, |
| 1266 | |
| 1267 | /* Normal 2's complement. */ |
| 1268 | BFD_RELOC_8, |
| 1269 | BFD_RELOC_16, |
| 1270 | BFD_RELOC_32, |
| 1271 | BFD_RELOC_8_PCREL, |
| 1272 | BFD_RELOC_16_PCREL, |
| 1273 | BFD_RELOC_32_PCREL |
| 1274 | }; |
| 1275 | |
| 1276 | switch (size) |
| 1277 | { |
| 1278 | case 1: |
| 1279 | length = 0; |
| 1280 | break; |
| 1281 | case 2: |
| 1282 | length = 1; |
| 1283 | break; |
| 1284 | case 4: |
| 1285 | length = 2; |
| 1286 | break; |
| 1287 | default: |
| 1288 | length = -1; |
| 1289 | break; |
| 1290 | } |
| 1291 | |
| 1292 | rel_index = length + 3 * pcrel + 6 * type; |
| 1293 | |
| 1294 | if (rel_index >= 0 && (unsigned int) rel_index < sizeof (relocs) / sizeof (relocs[0])) |
| 1295 | return relocs[rel_index]; |
| 1296 | |
| 1297 | if (pcrel) |
| 1298 | as_bad (_("Can not do %d byte pc-relative relocation for storage type %d"), |
| 1299 | size, type); |
| 1300 | else |
| 1301 | as_bad (_("Can not do %d byte relocation for storage type %d"), |
| 1302 | size, type); |
| 1303 | |
| 1304 | return BFD_RELOC_NONE; |
| 1305 | |
| 1306 | } |
| 1307 | |
| 1308 | static void |
| 1309 | fix_new_ns32k (fragS *frag, /* Which frag? */ |
| 1310 | int where, /* Where in that frag? */ |
| 1311 | int size, /* 1, 2 or 4 usually. */ |
| 1312 | symbolS *add_symbol, /* X_add_symbol. */ |
| 1313 | long offset, /* X_add_number. */ |
| 1314 | int pcrel, /* True if PC-relative relocation. */ |
| 1315 | char im_disp, /* True if the value to write is a |
| 1316 | displacement. */ |
| 1317 | bit_fixS *bit_fixP, /* Pointer at struct of bit_fix's, ignored if |
| 1318 | NULL. */ |
| 1319 | char bsr, /* Sequent-linker-hack: 1 when relocobject is |
| 1320 | a bsr. */ |
| 1321 | fragS *opcode_frag, |
| 1322 | unsigned int opcode_offset) |
| 1323 | { |
| 1324 | fixS *fixP = fix_new (frag, where, size, add_symbol, |
| 1325 | offset, pcrel, |
| 1326 | bit_fixP ? NO_RELOC : reloc (size, pcrel, im_disp) |
| 1327 | ); |
| 1328 | |
| 1329 | fix_opcode_frag (fixP) = opcode_frag; |
| 1330 | fix_opcode_offset (fixP) = opcode_offset; |
| 1331 | fix_im_disp (fixP) = im_disp; |
| 1332 | fix_bsr (fixP) = bsr; |
| 1333 | fix_bit_fixP (fixP) = bit_fixP; |
| 1334 | /* We have a MD overflow check for displacements. */ |
| 1335 | fixP->fx_no_overflow = (im_disp != 0); |
| 1336 | } |
| 1337 | |
| 1338 | static void |
| 1339 | fix_new_ns32k_exp (fragS *frag, /* Which frag? */ |
| 1340 | int where, /* Where in that frag? */ |
| 1341 | int size, /* 1, 2 or 4 usually. */ |
| 1342 | expressionS *exp, /* Expression. */ |
| 1343 | int pcrel, /* True if PC-relative relocation. */ |
| 1344 | char im_disp, /* True if the value to write is a |
| 1345 | displacement. */ |
| 1346 | bit_fixS *bit_fixP, /* Pointer at struct of bit_fix's, ignored if |
| 1347 | NULL. */ |
| 1348 | char bsr, /* Sequent-linker-hack: 1 when relocobject is |
| 1349 | a bsr. */ |
| 1350 | fragS *opcode_frag, |
| 1351 | unsigned int opcode_offset) |
| 1352 | { |
| 1353 | fixS *fixP = fix_new_exp (frag, where, size, exp, pcrel, |
| 1354 | bit_fixP ? NO_RELOC : reloc (size, pcrel, im_disp) |
| 1355 | ); |
| 1356 | |
| 1357 | fix_opcode_frag (fixP) = opcode_frag; |
| 1358 | fix_opcode_offset (fixP) = opcode_offset; |
| 1359 | fix_im_disp (fixP) = im_disp; |
| 1360 | fix_bsr (fixP) = bsr; |
| 1361 | fix_bit_fixP (fixP) = bit_fixP; |
| 1362 | /* We have a MD overflow check for displacements. */ |
| 1363 | fixP->fx_no_overflow = (im_disp != 0); |
| 1364 | } |
| 1365 | |
| 1366 | /* Convert number to chars in correct order. */ |
| 1367 | |
| 1368 | void |
| 1369 | md_number_to_chars (char *buf, valueT value, int nbytes) |
| 1370 | { |
| 1371 | number_to_chars_littleendian (buf, value, nbytes); |
| 1372 | } |
| 1373 | |
| 1374 | /* This is a variant of md_numbers_to_chars. The reason for its' |
| 1375 | existence is the fact that ns32k uses Huffman coded |
| 1376 | displacements. This implies that the bit order is reversed in |
| 1377 | displacements and that they are prefixed with a size-tag. |
| 1378 | |
| 1379 | binary: msb -> lsb |
| 1380 | 0xxxxxxx byte |
| 1381 | 10xxxxxx xxxxxxxx word |
| 1382 | 11xxxxxx xxxxxxxx xxxxxxxx xxxxxxxx double word |
| 1383 | |
| 1384 | This must be taken care of and we do it here! */ |
| 1385 | |
| 1386 | static void |
| 1387 | md_number_to_disp (char *buf, long val, int n) |
| 1388 | { |
| 1389 | switch (n) |
| 1390 | { |
| 1391 | case 1: |
| 1392 | if (val < -64 || val > 63) |
| 1393 | as_bad (_("value of %ld out of byte displacement range."), val); |
| 1394 | val &= 0x7f; |
| 1395 | #ifdef SHOW_NUM |
| 1396 | printf ("%x ", val & 0xff); |
| 1397 | #endif |
| 1398 | *buf++ = val; |
| 1399 | break; |
| 1400 | |
| 1401 | case 2: |
| 1402 | if (val < -8192 || val > 8191) |
| 1403 | as_bad (_("value of %ld out of word displacement range."), val); |
| 1404 | val &= 0x3fff; |
| 1405 | val |= 0x8000; |
| 1406 | #ifdef SHOW_NUM |
| 1407 | printf ("%x ", val >> 8 & 0xff); |
| 1408 | #endif |
| 1409 | *buf++ = (val >> 8); |
| 1410 | #ifdef SHOW_NUM |
| 1411 | printf ("%x ", val & 0xff); |
| 1412 | #endif |
| 1413 | *buf++ = val; |
| 1414 | break; |
| 1415 | |
| 1416 | case 4: |
| 1417 | if (val < -0x20000000 || val >= 0x20000000) |
| 1418 | as_bad (_("value of %ld out of double word displacement range."), val); |
| 1419 | val |= 0xc0000000; |
| 1420 | #ifdef SHOW_NUM |
| 1421 | printf ("%x ", val >> 24 & 0xff); |
| 1422 | #endif |
| 1423 | *buf++ = (val >> 24); |
| 1424 | #ifdef SHOW_NUM |
| 1425 | printf ("%x ", val >> 16 & 0xff); |
| 1426 | #endif |
| 1427 | *buf++ = (val >> 16); |
| 1428 | #ifdef SHOW_NUM |
| 1429 | printf ("%x ", val >> 8 & 0xff); |
| 1430 | #endif |
| 1431 | *buf++ = (val >> 8); |
| 1432 | #ifdef SHOW_NUM |
| 1433 | printf ("%x ", val & 0xff); |
| 1434 | #endif |
| 1435 | *buf++ = val; |
| 1436 | break; |
| 1437 | |
| 1438 | default: |
| 1439 | as_fatal (_("Internal logic error. line %d, file \"%s\""), |
| 1440 | __LINE__, __FILE__); |
| 1441 | } |
| 1442 | } |
| 1443 | |
| 1444 | static void |
| 1445 | md_number_to_imm (char *buf, long val, int n) |
| 1446 | { |
| 1447 | switch (n) |
| 1448 | { |
| 1449 | case 1: |
| 1450 | #ifdef SHOW_NUM |
| 1451 | printf ("%x ", val & 0xff); |
| 1452 | #endif |
| 1453 | *buf++ = val; |
| 1454 | break; |
| 1455 | |
| 1456 | case 2: |
| 1457 | #ifdef SHOW_NUM |
| 1458 | printf ("%x ", val >> 8 & 0xff); |
| 1459 | #endif |
| 1460 | *buf++ = (val >> 8); |
| 1461 | #ifdef SHOW_NUM |
| 1462 | printf ("%x ", val & 0xff); |
| 1463 | #endif |
| 1464 | *buf++ = val; |
| 1465 | break; |
| 1466 | |
| 1467 | case 4: |
| 1468 | #ifdef SHOW_NUM |
| 1469 | printf ("%x ", val >> 24 & 0xff); |
| 1470 | #endif |
| 1471 | *buf++ = (val >> 24); |
| 1472 | #ifdef SHOW_NUM |
| 1473 | printf ("%x ", val >> 16 & 0xff); |
| 1474 | #endif |
| 1475 | *buf++ = (val >> 16); |
| 1476 | #ifdef SHOW_NUM |
| 1477 | printf ("%x ", val >> 8 & 0xff); |
| 1478 | #endif |
| 1479 | *buf++ = (val >> 8); |
| 1480 | #ifdef SHOW_NUM |
| 1481 | printf ("%x ", val & 0xff); |
| 1482 | #endif |
| 1483 | *buf++ = val; |
| 1484 | break; |
| 1485 | |
| 1486 | default: |
| 1487 | as_fatal (_("Internal logic error. line %d, file \"%s\""), |
| 1488 | __LINE__, __FILE__); |
| 1489 | } |
| 1490 | } |
| 1491 | |
| 1492 | /* Fast bitfiddling support. */ |
| 1493 | /* Mask used to zero bitfield before oring in the true field. */ |
| 1494 | |
| 1495 | static unsigned long l_mask[] = |
| 1496 | { |
| 1497 | 0xffffffff, 0xfffffffe, 0xfffffffc, 0xfffffff8, |
| 1498 | 0xfffffff0, 0xffffffe0, 0xffffffc0, 0xffffff80, |
| 1499 | 0xffffff00, 0xfffffe00, 0xfffffc00, 0xfffff800, |
| 1500 | 0xfffff000, 0xffffe000, 0xffffc000, 0xffff8000, |
| 1501 | 0xffff0000, 0xfffe0000, 0xfffc0000, 0xfff80000, |
| 1502 | 0xfff00000, 0xffe00000, 0xffc00000, 0xff800000, |
| 1503 | 0xff000000, 0xfe000000, 0xfc000000, 0xf8000000, |
| 1504 | 0xf0000000, 0xe0000000, 0xc0000000, 0x80000000, |
| 1505 | }; |
| 1506 | static unsigned long r_mask[] = |
| 1507 | { |
| 1508 | 0x00000000, 0x00000001, 0x00000003, 0x00000007, |
| 1509 | 0x0000000f, 0x0000001f, 0x0000003f, 0x0000007f, |
| 1510 | 0x000000ff, 0x000001ff, 0x000003ff, 0x000007ff, |
| 1511 | 0x00000fff, 0x00001fff, 0x00003fff, 0x00007fff, |
| 1512 | 0x0000ffff, 0x0001ffff, 0x0003ffff, 0x0007ffff, |
| 1513 | 0x000fffff, 0x001fffff, 0x003fffff, 0x007fffff, |
| 1514 | 0x00ffffff, 0x01ffffff, 0x03ffffff, 0x07ffffff, |
| 1515 | 0x0fffffff, 0x1fffffff, 0x3fffffff, 0x7fffffff, |
| 1516 | }; |
| 1517 | #define MASK_BITS 31 |
| 1518 | /* Insert bitfield described by field_ptr and val at buf |
| 1519 | This routine is written for modification of the first 4 bytes pointed |
| 1520 | to by buf, to yield speed. |
| 1521 | The ifdef stuff is for selection between a ns32k-dependent routine |
| 1522 | and a general version. (My advice: use the general version!). */ |
| 1523 | |
| 1524 | static void |
| 1525 | md_number_to_field (char *buf, long val, bit_fixS *field_ptr) |
| 1526 | { |
| 1527 | unsigned long object; |
| 1528 | unsigned long mask; |
| 1529 | /* Define ENDIAN on a ns32k machine. */ |
| 1530 | #ifdef ENDIAN |
| 1531 | unsigned long *mem_ptr; |
| 1532 | #else |
| 1533 | char *mem_ptr; |
| 1534 | #endif |
| 1535 | |
| 1536 | if (field_ptr->fx_bit_min <= val && val <= field_ptr->fx_bit_max) |
| 1537 | { |
| 1538 | #ifdef ENDIAN |
| 1539 | if (field_ptr->fx_bit_base) |
| 1540 | /* Override buf. */ |
| 1541 | mem_ptr = (unsigned long *) field_ptr->fx_bit_base; |
| 1542 | else |
| 1543 | mem_ptr = (unsigned long *) buf; |
| 1544 | |
| 1545 | mem_ptr = ((unsigned long *) |
| 1546 | ((char *) mem_ptr + field_ptr->fx_bit_base_adj)); |
| 1547 | #else |
| 1548 | if (field_ptr->fx_bit_base) |
| 1549 | mem_ptr = (char *) field_ptr->fx_bit_base; |
| 1550 | else |
| 1551 | mem_ptr = buf; |
| 1552 | |
| 1553 | mem_ptr += field_ptr->fx_bit_base_adj; |
| 1554 | #endif |
| 1555 | #ifdef ENDIAN |
| 1556 | /* We have a nice ns32k machine with lowbyte at low-physical mem. */ |
| 1557 | object = *mem_ptr; /* get some bytes */ |
| 1558 | #else /* OVE Goof! the machine is a m68k or dito. */ |
| 1559 | /* That takes more byte fiddling. */ |
| 1560 | object = 0; |
| 1561 | object |= mem_ptr[3] & 0xff; |
| 1562 | object <<= 8; |
| 1563 | object |= mem_ptr[2] & 0xff; |
| 1564 | object <<= 8; |
| 1565 | object |= mem_ptr[1] & 0xff; |
| 1566 | object <<= 8; |
| 1567 | object |= mem_ptr[0] & 0xff; |
| 1568 | #endif |
| 1569 | mask = 0; |
| 1570 | mask |= (r_mask[field_ptr->fx_bit_offset]); |
| 1571 | mask |= (l_mask[field_ptr->fx_bit_offset + field_ptr->fx_bit_size]); |
| 1572 | object &= mask; |
| 1573 | val += field_ptr->fx_bit_add; |
| 1574 | object |= ((val << field_ptr->fx_bit_offset) & (mask ^ 0xffffffff)); |
| 1575 | #ifdef ENDIAN |
| 1576 | *mem_ptr = object; |
| 1577 | #else |
| 1578 | mem_ptr[0] = (char) object; |
| 1579 | object >>= 8; |
| 1580 | mem_ptr[1] = (char) object; |
| 1581 | object >>= 8; |
| 1582 | mem_ptr[2] = (char) object; |
| 1583 | object >>= 8; |
| 1584 | mem_ptr[3] = (char) object; |
| 1585 | #endif |
| 1586 | } |
| 1587 | else |
| 1588 | as_bad (_("Bit field out of range")); |
| 1589 | } |
| 1590 | |
| 1591 | /* Convert iif to fragments. From this point we start to dribble with |
| 1592 | functions in other files than this one.(Except hash.c) So, if it's |
| 1593 | possible to make an iif for an other CPU, you don't need to know |
| 1594 | what frags, relax, obstacks, etc is in order to port this |
| 1595 | assembler. You only need to know if it's possible to reduce your |
| 1596 | cpu-instruction to iif-format (takes some work) and adopt the other |
| 1597 | md_? parts according to given instructions Note that iif was |
| 1598 | invented for the clean ns32k`s architecture. */ |
| 1599 | |
| 1600 | /* GAS for the ns32k has a problem. PC relative displacements are |
| 1601 | relative to the address of the opcode, not the address of the |
| 1602 | operand. We used to keep track of the offset between the operand |
| 1603 | and the opcode in pcrel_adjust for each frag and each fix. However, |
| 1604 | we get into trouble where there are two or more pc-relative |
| 1605 | operands and the size of the first one can't be determined. Then in |
| 1606 | the relax phase, the size of the first operand will change and |
| 1607 | pcrel_adjust will no longer be correct. The current solution is |
| 1608 | keep a pointer to the frag with the opcode in it and the offset in |
| 1609 | that frag for each frag and each fix. Then, when needed, we can |
| 1610 | always figure out how far it is between the opcode and the pcrel |
| 1611 | object. See also md_pcrel_adjust and md_fix_pcrel_adjust. For |
| 1612 | objects not part of an instruction, the pointer to the opcode frag |
| 1613 | is always zero. */ |
| 1614 | |
| 1615 | static void |
| 1616 | convert_iif (void) |
| 1617 | { |
| 1618 | int i; |
| 1619 | bit_fixS *j; |
| 1620 | fragS *inst_frag; |
| 1621 | unsigned int inst_offset; |
| 1622 | char *inst_opcode; |
| 1623 | char *memP; |
| 1624 | int l; |
| 1625 | int k; |
| 1626 | char type; |
| 1627 | char size = 0; |
| 1628 | |
| 1629 | frag_grow (iif.instr_size); /* This is important. */ |
| 1630 | memP = frag_more (0); |
| 1631 | inst_opcode = memP; |
| 1632 | inst_offset = (memP - frag_now->fr_literal); |
| 1633 | inst_frag = frag_now; |
| 1634 | |
| 1635 | for (i = 0; i < IIF_ENTRIES; i++) |
| 1636 | { |
| 1637 | if ((type = iif.iifP[i].type)) |
| 1638 | { |
| 1639 | /* The object exist, so handle it. */ |
| 1640 | switch (size = iif.iifP[i].size) |
| 1641 | { |
| 1642 | case 42: |
| 1643 | size = 0; |
| 1644 | /* It's a bitfix that operates on an existing object. */ |
| 1645 | if (iif.iifP[i].bit_fixP->fx_bit_base) |
| 1646 | /* Expand fx_bit_base to point at opcode. */ |
| 1647 | iif.iifP[i].bit_fixP->fx_bit_base = (long) inst_opcode; |
| 1648 | /* Fall through. */ |
| 1649 | |
| 1650 | case 8: /* bignum or doublefloat. */ |
| 1651 | case 1: |
| 1652 | case 2: |
| 1653 | case 3: |
| 1654 | case 4: |
| 1655 | /* The final size in objectmemory is known. */ |
| 1656 | memP = frag_more (size); |
| 1657 | j = iif.iifP[i].bit_fixP; |
| 1658 | |
| 1659 | switch (type) |
| 1660 | { |
| 1661 | case 1: /* The object is pure binary. */ |
| 1662 | if (j) |
| 1663 | md_number_to_field (memP, exprP.X_add_number, j); |
| 1664 | |
| 1665 | else if (iif.iifP[i].pcrel) |
| 1666 | fix_new_ns32k (frag_now, |
| 1667 | (long) (memP - frag_now->fr_literal), |
| 1668 | size, |
| 1669 | 0, |
| 1670 | iif.iifP[i].object, |
| 1671 | iif.iifP[i].pcrel, |
| 1672 | iif.iifP[i].im_disp, |
| 1673 | 0, |
| 1674 | iif.iifP[i].bsr, /* Sequent hack. */ |
| 1675 | inst_frag, inst_offset); |
| 1676 | else |
| 1677 | { |
| 1678 | /* Good, just put them bytes out. */ |
| 1679 | switch (iif.iifP[i].im_disp) |
| 1680 | { |
| 1681 | case 0: |
| 1682 | md_number_to_chars (memP, iif.iifP[i].object, size); |
| 1683 | break; |
| 1684 | case 1: |
| 1685 | md_number_to_disp (memP, iif.iifP[i].object, size); |
| 1686 | break; |
| 1687 | default: |
| 1688 | as_fatal (_("iif convert internal pcrel/binary")); |
| 1689 | } |
| 1690 | } |
| 1691 | break; |
| 1692 | |
| 1693 | case 2: |
| 1694 | /* The object is a pointer at an expression, so |
| 1695 | unpack it, note that bignums may result from the |
| 1696 | expression. */ |
| 1697 | evaluate_expr (&exprP, (char *) iif.iifP[i].object); |
| 1698 | if (exprP.X_op == O_big || size == 8) |
| 1699 | { |
| 1700 | if ((k = exprP.X_add_number) > 0) |
| 1701 | { |
| 1702 | /* We have a bignum ie a quad. This can only |
| 1703 | happens in a long suffixed instruction. */ |
| 1704 | if (k * 2 > size) |
| 1705 | as_bad (_("Bignum too big for long")); |
| 1706 | |
| 1707 | if (k == 3) |
| 1708 | memP += 2; |
| 1709 | |
| 1710 | for (l = 0; k > 0; k--, l += 2) |
| 1711 | md_number_to_chars (memP + l, |
| 1712 | generic_bignum[l >> 1], |
| 1713 | sizeof (LITTLENUM_TYPE)); |
| 1714 | } |
| 1715 | else |
| 1716 | { |
| 1717 | /* flonum. */ |
| 1718 | LITTLENUM_TYPE words[4]; |
| 1719 | |
| 1720 | switch (size) |
| 1721 | { |
| 1722 | case 4: |
| 1723 | gen_to_words (words, 2, 8); |
| 1724 | md_number_to_imm (memP, (long) words[0], |
| 1725 | sizeof (LITTLENUM_TYPE)); |
| 1726 | md_number_to_imm (memP + sizeof (LITTLENUM_TYPE), |
| 1727 | (long) words[1], |
| 1728 | sizeof (LITTLENUM_TYPE)); |
| 1729 | break; |
| 1730 | case 8: |
| 1731 | gen_to_words (words, 4, 11); |
| 1732 | md_number_to_imm (memP, (long) words[0], |
| 1733 | sizeof (LITTLENUM_TYPE)); |
| 1734 | md_number_to_imm (memP + sizeof (LITTLENUM_TYPE), |
| 1735 | (long) words[1], |
| 1736 | sizeof (LITTLENUM_TYPE)); |
| 1737 | md_number_to_imm ((memP + 2 |
| 1738 | * sizeof (LITTLENUM_TYPE)), |
| 1739 | (long) words[2], |
| 1740 | sizeof (LITTLENUM_TYPE)); |
| 1741 | md_number_to_imm ((memP + 3 |
| 1742 | * sizeof (LITTLENUM_TYPE)), |
| 1743 | (long) words[3], |
| 1744 | sizeof (LITTLENUM_TYPE)); |
| 1745 | break; |
| 1746 | } |
| 1747 | } |
| 1748 | break; |
| 1749 | } |
| 1750 | if (exprP.X_add_symbol || |
| 1751 | exprP.X_op_symbol || |
| 1752 | iif.iifP[i].pcrel) |
| 1753 | { |
| 1754 | /* The expression was undefined due to an |
| 1755 | undefined label. Create a fix so we can fix |
| 1756 | the object later. */ |
| 1757 | exprP.X_add_number += iif.iifP[i].object_adjust; |
| 1758 | fix_new_ns32k_exp (frag_now, |
| 1759 | (long) (memP - frag_now->fr_literal), |
| 1760 | size, |
| 1761 | &exprP, |
| 1762 | iif.iifP[i].pcrel, |
| 1763 | iif.iifP[i].im_disp, |
| 1764 | j, |
| 1765 | iif.iifP[i].bsr, |
| 1766 | inst_frag, inst_offset); |
| 1767 | } |
| 1768 | else if (j) |
| 1769 | md_number_to_field (memP, exprP.X_add_number, j); |
| 1770 | else |
| 1771 | { |
| 1772 | /* Good, just put them bytes out. */ |
| 1773 | switch (iif.iifP[i].im_disp) |
| 1774 | { |
| 1775 | case 0: |
| 1776 | md_number_to_imm (memP, exprP.X_add_number, size); |
| 1777 | break; |
| 1778 | case 1: |
| 1779 | md_number_to_disp (memP, exprP.X_add_number, size); |
| 1780 | break; |
| 1781 | default: |
| 1782 | as_fatal (_("iif convert internal pcrel/pointer")); |
| 1783 | } |
| 1784 | } |
| 1785 | break; |
| 1786 | default: |
| 1787 | as_fatal (_("Internal logic error in iif.iifP[n].type")); |
| 1788 | } |
| 1789 | break; |
| 1790 | |
| 1791 | case 0: |
| 1792 | /* Too bad, the object may be undefined as far as its |
| 1793 | final nsize in object memory is concerned. The size |
| 1794 | of the object in objectmemory is not explicitly |
| 1795 | given. If the object is defined its length can be |
| 1796 | determined and a fix can replace the frag. */ |
| 1797 | { |
| 1798 | evaluate_expr (&exprP, (char *) iif.iifP[i].object); |
| 1799 | |
| 1800 | if ((exprP.X_add_symbol || exprP.X_op_symbol) && |
| 1801 | !iif.iifP[i].pcrel) |
| 1802 | { |
| 1803 | /* Size is unknown until link time so have to default. */ |
| 1804 | size = default_disp_size; /* Normally 4 bytes. */ |
| 1805 | memP = frag_more (size); |
| 1806 | fix_new_ns32k_exp (frag_now, |
| 1807 | (long) (memP - frag_now->fr_literal), |
| 1808 | size, |
| 1809 | &exprP, |
| 1810 | 0, /* never iif.iifP[i].pcrel, */ |
| 1811 | 1, /* always iif.iifP[i].im_disp */ |
| 1812 | (bit_fixS *) 0, 0, |
| 1813 | inst_frag, |
| 1814 | inst_offset); |
| 1815 | break; /* Exit this absolute hack. */ |
| 1816 | } |
| 1817 | |
| 1818 | if (exprP.X_add_symbol || exprP.X_op_symbol) |
| 1819 | { |
| 1820 | /* Frag it. */ |
| 1821 | if (exprP.X_op_symbol) |
| 1822 | /* We cant relax this case. */ |
| 1823 | as_fatal (_("Can't relax difference")); |
| 1824 | else |
| 1825 | { |
| 1826 | /* Size is not important. This gets fixed by |
| 1827 | relax, but we assume 0 in what follows. */ |
| 1828 | memP = frag_more (4); /* Max size. */ |
| 1829 | size = 0; |
| 1830 | |
| 1831 | { |
| 1832 | fragS *old_frag = frag_now; |
| 1833 | frag_variant (rs_machine_dependent, |
| 1834 | 4, /* Max size. */ |
| 1835 | 0, /* Size. */ |
| 1836 | IND (BRANCH, UNDEF), /* Expecting |
| 1837 | the worst. */ |
| 1838 | exprP.X_add_symbol, |
| 1839 | exprP.X_add_number, |
| 1840 | inst_opcode); |
| 1841 | frag_opcode_frag (old_frag) = inst_frag; |
| 1842 | frag_opcode_offset (old_frag) = inst_offset; |
| 1843 | frag_bsr (old_frag) = iif.iifP[i].bsr; |
| 1844 | } |
| 1845 | } |
| 1846 | } |
| 1847 | else |
| 1848 | { |
| 1849 | /* This duplicates code in md_number_to_disp. */ |
| 1850 | if (-64 <= exprP.X_add_number && exprP.X_add_number <= 63) |
| 1851 | size = 1; |
| 1852 | else |
| 1853 | { |
| 1854 | if (-8192 <= exprP.X_add_number |
| 1855 | && exprP.X_add_number <= 8191) |
| 1856 | size = 2; |
| 1857 | else |
| 1858 | { |
| 1859 | if (-0x20000000 <= exprP.X_add_number |
| 1860 | && exprP.X_add_number<=0x1fffffff) |
| 1861 | size = 4; |
| 1862 | else |
| 1863 | { |
| 1864 | as_bad (_("Displacement too large for :d")); |
| 1865 | size = 4; |
| 1866 | } |
| 1867 | } |
| 1868 | } |
| 1869 | |
| 1870 | memP = frag_more (size); |
| 1871 | md_number_to_disp (memP, exprP.X_add_number, size); |
| 1872 | } |
| 1873 | } |
| 1874 | break; |
| 1875 | |
| 1876 | default: |
| 1877 | as_fatal (_("Internal logic error in iif.iifP[].type")); |
| 1878 | } |
| 1879 | } |
| 1880 | } |
| 1881 | } |
| 1882 | \f |
| 1883 | void |
| 1884 | md_assemble (char *line) |
| 1885 | { |
| 1886 | freeptr = freeptr_static; |
| 1887 | parse (line, 0); /* Explode line to more fix form in iif. */ |
| 1888 | convert_iif (); /* Convert iif to frags, fix's etc. */ |
| 1889 | #ifdef SHOW_NUM |
| 1890 | printf (" \t\t\t%s\n", line); |
| 1891 | #endif |
| 1892 | } |
| 1893 | |
| 1894 | void |
| 1895 | md_begin (void) |
| 1896 | { |
| 1897 | /* Build a hashtable of the instructions. */ |
| 1898 | const struct ns32k_opcode *ptr; |
| 1899 | const char *stat; |
| 1900 | const struct ns32k_opcode *endop; |
| 1901 | |
| 1902 | inst_hash_handle = hash_new (); |
| 1903 | |
| 1904 | endop = ns32k_opcodes + sizeof (ns32k_opcodes) / sizeof (ns32k_opcodes[0]); |
| 1905 | for (ptr = ns32k_opcodes; ptr < endop; ptr++) |
| 1906 | { |
| 1907 | if ((stat = hash_insert (inst_hash_handle, ptr->name, (char *) ptr))) |
| 1908 | /* Fatal. */ |
| 1909 | as_fatal (_("Can't hash %s: %s"), ptr->name, stat); |
| 1910 | } |
| 1911 | |
| 1912 | /* Some private space please! */ |
| 1913 | freeptr_static = (char *) malloc (PRIVATE_SIZE); |
| 1914 | } |
| 1915 | |
| 1916 | /* Turn the string pointed to by litP into a floating point constant |
| 1917 | of type TYPE, and emit the appropriate bytes. The number of |
| 1918 | LITTLENUMS emitted is stored in *SIZEP. An error message is |
| 1919 | returned, or NULL on OK. */ |
| 1920 | |
| 1921 | char * |
| 1922 | md_atof (int type, char *litP, int *sizeP) |
| 1923 | { |
| 1924 | return ieee_md_atof (type, litP, sizeP, FALSE); |
| 1925 | } |
| 1926 | \f |
| 1927 | int |
| 1928 | md_pcrel_adjust (fragS *fragP) |
| 1929 | { |
| 1930 | fragS *opcode_frag; |
| 1931 | addressT opcode_address; |
| 1932 | unsigned int offset; |
| 1933 | |
| 1934 | opcode_frag = frag_opcode_frag (fragP); |
| 1935 | if (opcode_frag == 0) |
| 1936 | return 0; |
| 1937 | |
| 1938 | offset = frag_opcode_offset (fragP); |
| 1939 | opcode_address = offset + opcode_frag->fr_address; |
| 1940 | |
| 1941 | return fragP->fr_address + fragP->fr_fix - opcode_address; |
| 1942 | } |
| 1943 | |
| 1944 | static int |
| 1945 | md_fix_pcrel_adjust (fixS *fixP) |
| 1946 | { |
| 1947 | fragS *opcode_frag; |
| 1948 | addressT opcode_address; |
| 1949 | unsigned int offset; |
| 1950 | |
| 1951 | opcode_frag = fix_opcode_frag (fixP); |
| 1952 | if (opcode_frag == 0) |
| 1953 | return 0; |
| 1954 | |
| 1955 | offset = fix_opcode_offset (fixP); |
| 1956 | opcode_address = offset + opcode_frag->fr_address; |
| 1957 | |
| 1958 | return fixP->fx_where + fixP->fx_frag->fr_address - opcode_address; |
| 1959 | } |
| 1960 | |
| 1961 | /* Apply a fixS (fixup of an instruction or data that we didn't have |
| 1962 | enough info to complete immediately) to the data in a frag. |
| 1963 | |
| 1964 | On the ns32k, everything is in a different format, so we have broken |
| 1965 | out separate functions for each kind of thing we could be fixing. |
| 1966 | They all get called from here. */ |
| 1967 | |
| 1968 | void |
| 1969 | md_apply_fix (fixS *fixP, valueT * valP, segT seg ATTRIBUTE_UNUSED) |
| 1970 | { |
| 1971 | long val = * (long *) valP; |
| 1972 | char *buf = fixP->fx_where + fixP->fx_frag->fr_literal; |
| 1973 | |
| 1974 | if (fix_bit_fixP (fixP)) |
| 1975 | /* Bitfields to fix, sigh. */ |
| 1976 | md_number_to_field (buf, val, fix_bit_fixP (fixP)); |
| 1977 | else switch (fix_im_disp (fixP)) |
| 1978 | { |
| 1979 | case 0: |
| 1980 | /* Immediate field. */ |
| 1981 | md_number_to_imm (buf, val, fixP->fx_size); |
| 1982 | break; |
| 1983 | |
| 1984 | case 1: |
| 1985 | /* Displacement field. */ |
| 1986 | /* Calculate offset. */ |
| 1987 | md_number_to_disp (buf, |
| 1988 | (fixP->fx_pcrel ? val + md_fix_pcrel_adjust (fixP) |
| 1989 | : val), fixP->fx_size); |
| 1990 | break; |
| 1991 | |
| 1992 | case 2: |
| 1993 | /* Pointer in a data object. */ |
| 1994 | md_number_to_chars (buf, val, fixP->fx_size); |
| 1995 | break; |
| 1996 | } |
| 1997 | |
| 1998 | if (fixP->fx_addsy == NULL && fixP->fx_pcrel == 0) |
| 1999 | fixP->fx_done = 1; |
| 2000 | } |
| 2001 | \f |
| 2002 | /* Convert a relaxed displacement to ditto in final output. */ |
| 2003 | |
| 2004 | void |
| 2005 | md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED, |
| 2006 | segT sec ATTRIBUTE_UNUSED, |
| 2007 | fragS *fragP) |
| 2008 | { |
| 2009 | long disp; |
| 2010 | long ext = 0; |
| 2011 | /* Address in gas core of the place to store the displacement. */ |
| 2012 | char *buffer_address = fragP->fr_fix + fragP->fr_literal; |
| 2013 | /* Address in object code of the displacement. */ |
| 2014 | int object_address; |
| 2015 | |
| 2016 | switch (fragP->fr_subtype) |
| 2017 | { |
| 2018 | case IND (BRANCH, BYTE): |
| 2019 | ext = 1; |
| 2020 | break; |
| 2021 | case IND (BRANCH, WORD): |
| 2022 | ext = 2; |
| 2023 | break; |
| 2024 | case IND (BRANCH, DOUBLE): |
| 2025 | ext = 4; |
| 2026 | break; |
| 2027 | } |
| 2028 | |
| 2029 | if (ext == 0) |
| 2030 | return; |
| 2031 | |
| 2032 | know (fragP->fr_symbol); |
| 2033 | |
| 2034 | object_address = fragP->fr_fix + fragP->fr_address; |
| 2035 | |
| 2036 | /* The displacement of the address, from current location. */ |
| 2037 | disp = (S_GET_VALUE (fragP->fr_symbol) + fragP->fr_offset) - object_address; |
| 2038 | disp += md_pcrel_adjust (fragP); |
| 2039 | |
| 2040 | md_number_to_disp (buffer_address, (long) disp, (int) ext); |
| 2041 | fragP->fr_fix += ext; |
| 2042 | } |
| 2043 | |
| 2044 | /* This function returns the estimated size a variable object will occupy, |
| 2045 | one can say that we tries to guess the size of the objects before we |
| 2046 | actually know it. */ |
| 2047 | |
| 2048 | int |
| 2049 | md_estimate_size_before_relax (fragS *fragP, segT segment) |
| 2050 | { |
| 2051 | if (fragP->fr_subtype == IND (BRANCH, UNDEF)) |
| 2052 | { |
| 2053 | if (S_GET_SEGMENT (fragP->fr_symbol) != segment) |
| 2054 | { |
| 2055 | /* We don't relax symbols defined in another segment. The |
| 2056 | thing to do is to assume the object will occupy 4 bytes. */ |
| 2057 | fix_new_ns32k (fragP, |
| 2058 | (int) (fragP->fr_fix), |
| 2059 | 4, |
| 2060 | fragP->fr_symbol, |
| 2061 | fragP->fr_offset, |
| 2062 | 1, |
| 2063 | 1, |
| 2064 | 0, |
| 2065 | frag_bsr(fragP), /* Sequent hack. */ |
| 2066 | frag_opcode_frag (fragP), |
| 2067 | frag_opcode_offset (fragP)); |
| 2068 | fragP->fr_fix += 4; |
| 2069 | frag_wane (fragP); |
| 2070 | return 4; |
| 2071 | } |
| 2072 | |
| 2073 | /* Relaxable case. Set up the initial guess for the variable |
| 2074 | part of the frag. */ |
| 2075 | fragP->fr_subtype = IND (BRANCH, BYTE); |
| 2076 | } |
| 2077 | |
| 2078 | if (fragP->fr_subtype >= sizeof (md_relax_table) / sizeof (md_relax_table[0])) |
| 2079 | abort (); |
| 2080 | |
| 2081 | /* Return the size of the variable part of the frag. */ |
| 2082 | return md_relax_table[fragP->fr_subtype].rlx_length; |
| 2083 | } |
| 2084 | |
| 2085 | int md_short_jump_size = 3; |
| 2086 | int md_long_jump_size = 5; |
| 2087 | |
| 2088 | void |
| 2089 | md_create_short_jump (char *ptr, |
| 2090 | addressT from_addr, |
| 2091 | addressT to_addr, |
| 2092 | fragS *frag ATTRIBUTE_UNUSED, |
| 2093 | symbolS *to_symbol ATTRIBUTE_UNUSED) |
| 2094 | { |
| 2095 | valueT offset; |
| 2096 | |
| 2097 | offset = to_addr - from_addr; |
| 2098 | md_number_to_chars (ptr, (valueT) 0xEA, 1); |
| 2099 | md_number_to_disp (ptr + 1, (valueT) offset, 2); |
| 2100 | } |
| 2101 | |
| 2102 | void |
| 2103 | md_create_long_jump (char *ptr, |
| 2104 | addressT from_addr, |
| 2105 | addressT to_addr, |
| 2106 | fragS *frag ATTRIBUTE_UNUSED, |
| 2107 | symbolS *to_symbol ATTRIBUTE_UNUSED) |
| 2108 | { |
| 2109 | valueT offset; |
| 2110 | |
| 2111 | offset = to_addr - from_addr; |
| 2112 | md_number_to_chars (ptr, (valueT) 0xEA, 1); |
| 2113 | md_number_to_disp (ptr + 1, (valueT) offset, 4); |
| 2114 | } |
| 2115 | \f |
| 2116 | const char *md_shortopts = "m:"; |
| 2117 | |
| 2118 | struct option md_longopts[] = |
| 2119 | { |
| 2120 | #define OPTION_DISP_SIZE (OPTION_MD_BASE) |
| 2121 | {"disp-size-default", required_argument , NULL, OPTION_DISP_SIZE}, |
| 2122 | {NULL, no_argument, NULL, 0} |
| 2123 | }; |
| 2124 | |
| 2125 | size_t md_longopts_size = sizeof (md_longopts); |
| 2126 | |
| 2127 | int |
| 2128 | md_parse_option (int c, char *arg) |
| 2129 | { |
| 2130 | switch (c) |
| 2131 | { |
| 2132 | case 'm': |
| 2133 | if (!strcmp (arg, "32032")) |
| 2134 | { |
| 2135 | cpureg = cpureg_032; |
| 2136 | mmureg = mmureg_032; |
| 2137 | } |
| 2138 | else if (!strcmp (arg, "32532")) |
| 2139 | { |
| 2140 | cpureg = cpureg_532; |
| 2141 | mmureg = mmureg_532; |
| 2142 | } |
| 2143 | else |
| 2144 | { |
| 2145 | as_warn (_("invalid architecture option -m%s, ignored"), arg); |
| 2146 | return 0; |
| 2147 | } |
| 2148 | break; |
| 2149 | case OPTION_DISP_SIZE: |
| 2150 | { |
| 2151 | int size = atoi(arg); |
| 2152 | switch (size) |
| 2153 | { |
| 2154 | case 1: case 2: case 4: |
| 2155 | default_disp_size = size; |
| 2156 | break; |
| 2157 | default: |
| 2158 | as_warn (_("invalid default displacement size \"%s\". Defaulting to %d."), |
| 2159 | arg, default_disp_size); |
| 2160 | } |
| 2161 | break; |
| 2162 | } |
| 2163 | |
| 2164 | default: |
| 2165 | return 0; |
| 2166 | } |
| 2167 | |
| 2168 | return 1; |
| 2169 | } |
| 2170 | |
| 2171 | void |
| 2172 | md_show_usage (FILE *stream) |
| 2173 | { |
| 2174 | fprintf (stream, _("\ |
| 2175 | NS32K options:\n\ |
| 2176 | -m32032 | -m32532 select variant of NS32K architecture\n\ |
| 2177 | --disp-size-default=<1|2|4>\n")); |
| 2178 | } |
| 2179 | \f |
| 2180 | /* This is TC_CONS_FIX_NEW, called by emit_expr in read.c. */ |
| 2181 | |
| 2182 | void |
| 2183 | cons_fix_new_ns32k (fragS *frag, /* Which frag? */ |
| 2184 | int where, /* Where in that frag? */ |
| 2185 | int size, /* 1, 2 or 4 usually. */ |
| 2186 | expressionS *exp) /* Expression. */ |
| 2187 | { |
| 2188 | fix_new_ns32k_exp (frag, where, size, exp, |
| 2189 | 0, 2, 0, 0, 0, 0); |
| 2190 | } |
| 2191 | |
| 2192 | /* We have no need to default values of symbols. */ |
| 2193 | |
| 2194 | symbolS * |
| 2195 | md_undefined_symbol (char *name ATTRIBUTE_UNUSED) |
| 2196 | { |
| 2197 | return 0; |
| 2198 | } |
| 2199 | |
| 2200 | /* Round up a section size to the appropriate boundary. */ |
| 2201 | |
| 2202 | valueT |
| 2203 | md_section_align (segT segment ATTRIBUTE_UNUSED, valueT size) |
| 2204 | { |
| 2205 | return size; /* Byte alignment is fine. */ |
| 2206 | } |
| 2207 | |
| 2208 | /* Exactly what point is a PC-relative offset relative TO? On the |
| 2209 | ns32k, they're relative to the start of the instruction. */ |
| 2210 | |
| 2211 | long |
| 2212 | md_pcrel_from (fixS *fixP) |
| 2213 | { |
| 2214 | long res; |
| 2215 | |
| 2216 | res = fixP->fx_where + fixP->fx_frag->fr_address; |
| 2217 | #ifdef SEQUENT_COMPATABILITY |
| 2218 | if (frag_bsr (fixP->fx_frag)) |
| 2219 | res += 0x12 /* FOO Kludge alert! */ |
| 2220 | #endif |
| 2221 | return res; |
| 2222 | } |
| 2223 | |
| 2224 | arelent * |
| 2225 | tc_gen_reloc (asection *section ATTRIBUTE_UNUSED, fixS *fixp) |
| 2226 | { |
| 2227 | arelent *rel; |
| 2228 | bfd_reloc_code_real_type code; |
| 2229 | |
| 2230 | code = reloc (fixp->fx_size, fixp->fx_pcrel, fix_im_disp (fixp)); |
| 2231 | |
| 2232 | rel = xmalloc (sizeof (arelent)); |
| 2233 | rel->sym_ptr_ptr = xmalloc (sizeof (asymbol *)); |
| 2234 | *rel->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); |
| 2235 | rel->address = fixp->fx_frag->fr_address + fixp->fx_where; |
| 2236 | if (fixp->fx_pcrel) |
| 2237 | rel->addend = fixp->fx_addnumber; |
| 2238 | else |
| 2239 | rel->addend = 0; |
| 2240 | |
| 2241 | rel->howto = bfd_reloc_type_lookup (stdoutput, code); |
| 2242 | if (!rel->howto) |
| 2243 | { |
| 2244 | const char *name; |
| 2245 | |
| 2246 | name = S_GET_NAME (fixp->fx_addsy); |
| 2247 | if (name == NULL) |
| 2248 | name = _("<unknown>"); |
| 2249 | as_fatal (_("Cannot find relocation type for symbol %s, code %d"), |
| 2250 | name, (int) code); |
| 2251 | } |
| 2252 | |
| 2253 | return rel; |
| 2254 | } |