| 1 | /* OBSOLETE /* Target-machine dependent code for the AMD 29000 */ |
| 2 | /* OBSOLETE Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, */ |
| 3 | /* OBSOLETE 2001 */ |
| 4 | /* OBSOLETE Free Software Foundation, Inc. */ |
| 5 | /* OBSOLETE Contributed by Cygnus Support. Written by Jim Kingdon. */ |
| 6 | /* OBSOLETE */ |
| 7 | /* OBSOLETE This file is part of GDB. */ |
| 8 | /* OBSOLETE */ |
| 9 | /* OBSOLETE This program is free software; you can redistribute it and/or modify */ |
| 10 | /* OBSOLETE it under the terms of the GNU General Public License as published by */ |
| 11 | /* OBSOLETE the Free Software Foundation; either version 2 of the License, or */ |
| 12 | /* OBSOLETE (at your option) any later version. */ |
| 13 | /* OBSOLETE */ |
| 14 | /* OBSOLETE This program is distributed in the hope that it will be useful, */ |
| 15 | /* OBSOLETE but WITHOUT ANY WARRANTY; without even the implied warranty of */ |
| 16 | /* OBSOLETE MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ |
| 17 | /* OBSOLETE GNU General Public License for more details. */ |
| 18 | /* OBSOLETE */ |
| 19 | /* OBSOLETE You should have received a copy of the GNU General Public License */ |
| 20 | /* OBSOLETE along with this program; if not, write to the Free Software */ |
| 21 | /* OBSOLETE Foundation, Inc., 59 Temple Place - Suite 330, */ |
| 22 | /* OBSOLETE Boston, MA 02111-1307, USA. */ */ |
| 23 | /* OBSOLETE */ |
| 24 | /* OBSOLETE #include "defs.h" */ |
| 25 | /* OBSOLETE #include "gdbcore.h" */ |
| 26 | /* OBSOLETE #include "frame.h" */ |
| 27 | /* OBSOLETE #include "value.h" */ |
| 28 | /* OBSOLETE #include "symtab.h" */ |
| 29 | /* OBSOLETE #include "inferior.h" */ |
| 30 | /* OBSOLETE #include "gdbcmd.h" */ |
| 31 | /* OBSOLETE #include "regcache.h" */ |
| 32 | /* OBSOLETE */ |
| 33 | /* OBSOLETE /* If all these bits in an instruction word are zero, it is a "tag word" */ |
| 34 | /* OBSOLETE which precedes a function entry point and gives stack traceback info. */ |
| 35 | /* OBSOLETE This used to be defined as 0xff000000, but that treated 0x00000deb as */ |
| 36 | /* OBSOLETE a tag word, while it is really used as a breakpoint. */ */ |
| 37 | /* OBSOLETE #define TAGWORD_ZERO_MASK 0xff00f800 */ |
| 38 | /* OBSOLETE */ |
| 39 | /* OBSOLETE extern CORE_ADDR text_start; /* FIXME, kludge... */ */ |
| 40 | /* OBSOLETE */ |
| 41 | /* OBSOLETE /* The user-settable top of the register stack in virtual memory. We */ |
| 42 | /* OBSOLETE won't attempt to access any stored registers above this address, if set */ |
| 43 | /* OBSOLETE nonzero. */ */ |
| 44 | /* OBSOLETE */ |
| 45 | /* OBSOLETE static CORE_ADDR rstack_high_address = UINT_MAX; */ |
| 46 | /* OBSOLETE */ |
| 47 | /* OBSOLETE */ |
| 48 | /* OBSOLETE /* Should call_function allocate stack space for a struct return? */ */ |
| 49 | /* OBSOLETE /* On the a29k objects over 16 words require the caller to allocate space. */ */ |
| 50 | /* OBSOLETE int */ |
| 51 | /* OBSOLETE a29k_use_struct_convention (int gcc_p, struct type *type) */ |
| 52 | /* OBSOLETE { */ |
| 53 | /* OBSOLETE return (TYPE_LENGTH (type) > 16 * 4); */ |
| 54 | /* OBSOLETE } */ |
| 55 | /* OBSOLETE */ |
| 56 | /* OBSOLETE */ |
| 57 | /* OBSOLETE /* Structure to hold cached info about function prologues. */ */ |
| 58 | /* OBSOLETE */ |
| 59 | /* OBSOLETE struct prologue_info */ |
| 60 | /* OBSOLETE { */ |
| 61 | /* OBSOLETE CORE_ADDR pc; /* First addr after fn prologue */ */ |
| 62 | /* OBSOLETE unsigned rsize, msize; /* register stack frame size, mem stack ditto */ */ |
| 63 | /* OBSOLETE unsigned mfp_used:1; /* memory frame pointer used */ */ |
| 64 | /* OBSOLETE unsigned rsize_valid:1; /* Validity bits for the above */ */ |
| 65 | /* OBSOLETE unsigned msize_valid:1; */ |
| 66 | /* OBSOLETE unsigned mfp_valid:1; */ |
| 67 | /* OBSOLETE }; */ |
| 68 | /* OBSOLETE */ |
| 69 | /* OBSOLETE /* Examine the prologue of a function which starts at PC. Return */ |
| 70 | /* OBSOLETE the first addess past the prologue. If MSIZE is non-NULL, then */ |
| 71 | /* OBSOLETE set *MSIZE to the memory stack frame size. If RSIZE is non-NULL, */ |
| 72 | /* OBSOLETE then set *RSIZE to the register stack frame size (not including */ |
| 73 | /* OBSOLETE incoming arguments and the return address & frame pointer stored */ |
| 74 | /* OBSOLETE with them). If no prologue is found, *RSIZE is set to zero. */ |
| 75 | /* OBSOLETE If no prologue is found, or a prologue which doesn't involve */ |
| 76 | /* OBSOLETE allocating a memory stack frame, then set *MSIZE to zero. */ |
| 77 | /* OBSOLETE */ |
| 78 | /* OBSOLETE Note that both msize and rsize are in bytes. This is not consistent */ |
| 79 | /* OBSOLETE with the _User's Manual_ with respect to rsize, but it is much more */ |
| 80 | /* OBSOLETE convenient. */ |
| 81 | /* OBSOLETE */ |
| 82 | /* OBSOLETE If MFP_USED is non-NULL, *MFP_USED is set to nonzero if a memory */ |
| 83 | /* OBSOLETE frame pointer is being used. */ */ |
| 84 | /* OBSOLETE */ |
| 85 | /* OBSOLETE CORE_ADDR */ |
| 86 | /* OBSOLETE examine_prologue (CORE_ADDR pc, unsigned *rsize, unsigned *msize, int *mfp_used) */ |
| 87 | /* OBSOLETE { */ |
| 88 | /* OBSOLETE long insn; */ |
| 89 | /* OBSOLETE CORE_ADDR p = pc; */ |
| 90 | /* OBSOLETE struct minimal_symbol *msymbol = lookup_minimal_symbol_by_pc (pc); */ |
| 91 | /* OBSOLETE struct prologue_info *mi = 0; */ |
| 92 | /* OBSOLETE */ |
| 93 | /* OBSOLETE if (msymbol != NULL) */ |
| 94 | /* OBSOLETE mi = (struct prologue_info *) msymbol->info; */ |
| 95 | /* OBSOLETE */ |
| 96 | /* OBSOLETE if (mi != 0) */ |
| 97 | /* OBSOLETE { */ |
| 98 | /* OBSOLETE int valid = 1; */ |
| 99 | /* OBSOLETE if (rsize != NULL) */ |
| 100 | /* OBSOLETE { */ |
| 101 | /* OBSOLETE *rsize = mi->rsize; */ |
| 102 | /* OBSOLETE valid &= mi->rsize_valid; */ |
| 103 | /* OBSOLETE } */ |
| 104 | /* OBSOLETE if (msize != NULL) */ |
| 105 | /* OBSOLETE { */ |
| 106 | /* OBSOLETE *msize = mi->msize; */ |
| 107 | /* OBSOLETE valid &= mi->msize_valid; */ |
| 108 | /* OBSOLETE } */ |
| 109 | /* OBSOLETE if (mfp_used != NULL) */ |
| 110 | /* OBSOLETE { */ |
| 111 | /* OBSOLETE *mfp_used = mi->mfp_used; */ |
| 112 | /* OBSOLETE valid &= mi->mfp_valid; */ |
| 113 | /* OBSOLETE } */ |
| 114 | /* OBSOLETE if (valid) */ |
| 115 | /* OBSOLETE return mi->pc; */ |
| 116 | /* OBSOLETE } */ |
| 117 | /* OBSOLETE */ |
| 118 | /* OBSOLETE if (rsize != NULL) */ |
| 119 | /* OBSOLETE *rsize = 0; */ |
| 120 | /* OBSOLETE if (msize != NULL) */ |
| 121 | /* OBSOLETE *msize = 0; */ |
| 122 | /* OBSOLETE if (mfp_used != NULL) */ |
| 123 | /* OBSOLETE *mfp_used = 0; */ |
| 124 | /* OBSOLETE */ |
| 125 | /* OBSOLETE /* Prologue must start with subtracting a constant from gr1. */ |
| 126 | /* OBSOLETE Normally this is sub gr1,gr1,<rsize * 4>. */ */ |
| 127 | /* OBSOLETE insn = read_memory_integer (p, 4); */ |
| 128 | /* OBSOLETE if ((insn & 0xffffff00) != 0x25010100) */ |
| 129 | /* OBSOLETE { */ |
| 130 | /* OBSOLETE /* If the frame is large, instead of a single instruction it */ |
| 131 | /* OBSOLETE might be a pair of instructions: */ |
| 132 | /* OBSOLETE const <reg>, <rsize * 4> */ |
| 133 | /* OBSOLETE sub gr1,gr1,<reg> */ |
| 134 | /* OBSOLETE */ */ |
| 135 | /* OBSOLETE int reg; */ |
| 136 | /* OBSOLETE /* Possible value for rsize. */ */ |
| 137 | /* OBSOLETE unsigned int rsize0; */ |
| 138 | /* OBSOLETE */ |
| 139 | /* OBSOLETE if ((insn & 0xff000000) != 0x03000000) */ |
| 140 | /* OBSOLETE { */ |
| 141 | /* OBSOLETE p = pc; */ |
| 142 | /* OBSOLETE goto done; */ |
| 143 | /* OBSOLETE } */ |
| 144 | /* OBSOLETE reg = (insn >> 8) & 0xff; */ |
| 145 | /* OBSOLETE rsize0 = (((insn >> 8) & 0xff00) | (insn & 0xff)); */ |
| 146 | /* OBSOLETE p += 4; */ |
| 147 | /* OBSOLETE insn = read_memory_integer (p, 4); */ |
| 148 | /* OBSOLETE if ((insn & 0xffffff00) != 0x24010100 */ |
| 149 | /* OBSOLETE || (insn & 0xff) != reg) */ |
| 150 | /* OBSOLETE { */ |
| 151 | /* OBSOLETE p = pc; */ |
| 152 | /* OBSOLETE goto done; */ |
| 153 | /* OBSOLETE } */ |
| 154 | /* OBSOLETE if (rsize != NULL) */ |
| 155 | /* OBSOLETE *rsize = rsize0; */ |
| 156 | /* OBSOLETE } */ |
| 157 | /* OBSOLETE else */ |
| 158 | /* OBSOLETE { */ |
| 159 | /* OBSOLETE if (rsize != NULL) */ |
| 160 | /* OBSOLETE *rsize = (insn & 0xff); */ |
| 161 | /* OBSOLETE } */ |
| 162 | /* OBSOLETE p += 4; */ |
| 163 | /* OBSOLETE */ |
| 164 | /* OBSOLETE /* Next instruction ought to be asgeu V_SPILL,gr1,rab. */ |
| 165 | /* OBSOLETE * We don't check the vector number to allow for kernel debugging. The */ |
| 166 | /* OBSOLETE * kernel will use a different trap number. */ |
| 167 | /* OBSOLETE * If this insn is missing, we just keep going; Metaware R2.3u compiler */ |
| 168 | /* OBSOLETE * generates prologue that intermixes initializations and puts the asgeu */ |
| 169 | /* OBSOLETE * way down. */ |
| 170 | /* OBSOLETE */ */ |
| 171 | /* OBSOLETE insn = read_memory_integer (p, 4); */ |
| 172 | /* OBSOLETE if ((insn & 0xff00ffff) == (0x5e000100 | RAB_HW_REGNUM)) */ |
| 173 | /* OBSOLETE { */ |
| 174 | /* OBSOLETE p += 4; */ |
| 175 | /* OBSOLETE } */ |
| 176 | /* OBSOLETE */ |
| 177 | /* OBSOLETE /* Next instruction usually sets the frame pointer (lr1) by adding */ |
| 178 | /* OBSOLETE <size * 4> from gr1. However, this can (and high C does) be */ |
| 179 | /* OBSOLETE deferred until anytime before the first function call. So it is */ |
| 180 | /* OBSOLETE OK if we don't see anything which sets lr1. */ |
| 181 | /* OBSOLETE To allow for alternate register sets (gcc -mkernel-registers) the msp */ |
| 182 | /* OBSOLETE register number is a compile time constant. */ */ |
| 183 | /* OBSOLETE */ |
| 184 | /* OBSOLETE /* Normally this is just add lr1,gr1,<size * 4>. */ */ |
| 185 | /* OBSOLETE insn = read_memory_integer (p, 4); */ |
| 186 | /* OBSOLETE if ((insn & 0xffffff00) == 0x15810100) */ |
| 187 | /* OBSOLETE p += 4; */ |
| 188 | /* OBSOLETE else */ |
| 189 | /* OBSOLETE { */ |
| 190 | /* OBSOLETE /* However, for large frames it can be */ |
| 191 | /* OBSOLETE const <reg>, <size *4> */ |
| 192 | /* OBSOLETE add lr1,gr1,<reg> */ |
| 193 | /* OBSOLETE */ */ |
| 194 | /* OBSOLETE int reg; */ |
| 195 | /* OBSOLETE CORE_ADDR q; */ |
| 196 | /* OBSOLETE */ |
| 197 | /* OBSOLETE if ((insn & 0xff000000) == 0x03000000) */ |
| 198 | /* OBSOLETE { */ |
| 199 | /* OBSOLETE reg = (insn >> 8) & 0xff; */ |
| 200 | /* OBSOLETE q = p + 4; */ |
| 201 | /* OBSOLETE insn = read_memory_integer (q, 4); */ |
| 202 | /* OBSOLETE if ((insn & 0xffffff00) == 0x14810100 */ |
| 203 | /* OBSOLETE && (insn & 0xff) == reg) */ |
| 204 | /* OBSOLETE p = q; */ |
| 205 | /* OBSOLETE } */ |
| 206 | /* OBSOLETE } */ |
| 207 | /* OBSOLETE */ |
| 208 | /* OBSOLETE /* Next comes "add lr{<rsize-1>},msp,0", but only if a memory */ |
| 209 | /* OBSOLETE frame pointer is in use. We just check for add lr<anything>,msp,0; */ |
| 210 | /* OBSOLETE we don't check this rsize against the first instruction, and */ |
| 211 | /* OBSOLETE we don't check that the trace-back tag indicates a memory frame pointer */ |
| 212 | /* OBSOLETE is in use. */ |
| 213 | /* OBSOLETE To allow for alternate register sets (gcc -mkernel-registers) the msp */ |
| 214 | /* OBSOLETE register number is a compile time constant. */ |
| 215 | /* OBSOLETE */ |
| 216 | /* OBSOLETE The recommended instruction is actually "sll lr<whatever>,msp,0". */ |
| 217 | /* OBSOLETE We check for that, too. Originally Jim Kingdon's code seemed */ |
| 218 | /* OBSOLETE to be looking for a "sub" instruction here, but the mask was set */ |
| 219 | /* OBSOLETE up to lose all the time. */ */ |
| 220 | /* OBSOLETE insn = read_memory_integer (p, 4); */ |
| 221 | /* OBSOLETE if (((insn & 0xff80ffff) == (0x15800000 | (MSP_HW_REGNUM << 8))) /* add */ */ |
| 222 | /* OBSOLETE || ((insn & 0xff80ffff) == (0x81800000 | (MSP_HW_REGNUM << 8)))) /* sll */ */ |
| 223 | /* OBSOLETE { */ |
| 224 | /* OBSOLETE p += 4; */ |
| 225 | /* OBSOLETE if (mfp_used != NULL) */ |
| 226 | /* OBSOLETE *mfp_used = 1; */ |
| 227 | /* OBSOLETE } */ |
| 228 | /* OBSOLETE */ |
| 229 | /* OBSOLETE /* Next comes a subtraction from msp to allocate a memory frame, */ |
| 230 | /* OBSOLETE but only if a memory frame is */ |
| 231 | /* OBSOLETE being used. We don't check msize against the trace-back tag. */ |
| 232 | /* OBSOLETE */ |
| 233 | /* OBSOLETE To allow for alternate register sets (gcc -mkernel-registers) the msp */ |
| 234 | /* OBSOLETE register number is a compile time constant. */ |
| 235 | /* OBSOLETE */ |
| 236 | /* OBSOLETE Normally this is just */ |
| 237 | /* OBSOLETE sub msp,msp,<msize> */ |
| 238 | /* OBSOLETE */ */ |
| 239 | /* OBSOLETE insn = read_memory_integer (p, 4); */ |
| 240 | /* OBSOLETE if ((insn & 0xffffff00) == */ |
| 241 | /* OBSOLETE (0x25000000 | (MSP_HW_REGNUM << 16) | (MSP_HW_REGNUM << 8))) */ |
| 242 | /* OBSOLETE { */ |
| 243 | /* OBSOLETE p += 4; */ |
| 244 | /* OBSOLETE if (msize != NULL) */ |
| 245 | /* OBSOLETE *msize = insn & 0xff; */ |
| 246 | /* OBSOLETE } */ |
| 247 | /* OBSOLETE else */ |
| 248 | /* OBSOLETE { */ |
| 249 | /* OBSOLETE /* For large frames, instead of a single instruction it might */ |
| 250 | /* OBSOLETE be */ |
| 251 | /* OBSOLETE */ |
| 252 | /* OBSOLETE const <reg>, <msize> */ |
| 253 | /* OBSOLETE consth <reg>, <msize> ; optional */ |
| 254 | /* OBSOLETE sub msp,msp,<reg> */ |
| 255 | /* OBSOLETE */ */ |
| 256 | /* OBSOLETE int reg; */ |
| 257 | /* OBSOLETE unsigned msize0; */ |
| 258 | /* OBSOLETE CORE_ADDR q = p; */ |
| 259 | /* OBSOLETE */ |
| 260 | /* OBSOLETE if ((insn & 0xff000000) == 0x03000000) */ |
| 261 | /* OBSOLETE { */ |
| 262 | /* OBSOLETE reg = (insn >> 8) & 0xff; */ |
| 263 | /* OBSOLETE msize0 = ((insn >> 8) & 0xff00) | (insn & 0xff); */ |
| 264 | /* OBSOLETE q += 4; */ |
| 265 | /* OBSOLETE insn = read_memory_integer (q, 4); */ |
| 266 | /* OBSOLETE /* Check for consth. */ */ |
| 267 | /* OBSOLETE if ((insn & 0xff000000) == 0x02000000 */ |
| 268 | /* OBSOLETE && (insn & 0x0000ff00) == reg) */ |
| 269 | /* OBSOLETE { */ |
| 270 | /* OBSOLETE msize0 |= (insn << 8) & 0xff000000; */ |
| 271 | /* OBSOLETE msize0 |= (insn << 16) & 0x00ff0000; */ |
| 272 | /* OBSOLETE q += 4; */ |
| 273 | /* OBSOLETE insn = read_memory_integer (q, 4); */ |
| 274 | /* OBSOLETE } */ |
| 275 | /* OBSOLETE /* Check for sub msp,msp,<reg>. */ */ |
| 276 | /* OBSOLETE if ((insn & 0xffffff00) == */ |
| 277 | /* OBSOLETE (0x24000000 | (MSP_HW_REGNUM << 16) | (MSP_HW_REGNUM << 8)) */ |
| 278 | /* OBSOLETE && (insn & 0xff) == reg) */ |
| 279 | /* OBSOLETE { */ |
| 280 | /* OBSOLETE p = q + 4; */ |
| 281 | /* OBSOLETE if (msize != NULL) */ |
| 282 | /* OBSOLETE *msize = msize0; */ |
| 283 | /* OBSOLETE } */ |
| 284 | /* OBSOLETE } */ |
| 285 | /* OBSOLETE } */ |
| 286 | /* OBSOLETE */ |
| 287 | /* OBSOLETE /* Next instruction might be asgeu V_SPILL,gr1,rab. */ |
| 288 | /* OBSOLETE * We don't check the vector number to allow for kernel debugging. The */ |
| 289 | /* OBSOLETE * kernel will use a different trap number. */ |
| 290 | /* OBSOLETE * Metaware R2.3u compiler */ |
| 291 | /* OBSOLETE * generates prologue that intermixes initializations and puts the asgeu */ |
| 292 | /* OBSOLETE * way down after everything else. */ |
| 293 | /* OBSOLETE */ */ |
| 294 | /* OBSOLETE insn = read_memory_integer (p, 4); */ |
| 295 | /* OBSOLETE if ((insn & 0xff00ffff) == (0x5e000100 | RAB_HW_REGNUM)) */ |
| 296 | /* OBSOLETE { */ |
| 297 | /* OBSOLETE p += 4; */ |
| 298 | /* OBSOLETE } */ |
| 299 | /* OBSOLETE */ |
| 300 | /* OBSOLETE done: */ |
| 301 | /* OBSOLETE if (msymbol != NULL) */ |
| 302 | /* OBSOLETE { */ |
| 303 | /* OBSOLETE if (mi == 0) */ |
| 304 | /* OBSOLETE { */ |
| 305 | /* OBSOLETE /* Add a new cache entry. */ */ |
| 306 | /* OBSOLETE mi = (struct prologue_info *) xmalloc (sizeof (struct prologue_info)); */ |
| 307 | /* OBSOLETE msymbol->info = (char *) mi; */ |
| 308 | /* OBSOLETE mi->rsize_valid = 0; */ |
| 309 | /* OBSOLETE mi->msize_valid = 0; */ |
| 310 | /* OBSOLETE mi->mfp_valid = 0; */ |
| 311 | /* OBSOLETE } */ |
| 312 | /* OBSOLETE /* else, cache entry exists, but info is incomplete. */ */ |
| 313 | /* OBSOLETE mi->pc = p; */ |
| 314 | /* OBSOLETE if (rsize != NULL) */ |
| 315 | /* OBSOLETE { */ |
| 316 | /* OBSOLETE mi->rsize = *rsize; */ |
| 317 | /* OBSOLETE mi->rsize_valid = 1; */ |
| 318 | /* OBSOLETE } */ |
| 319 | /* OBSOLETE if (msize != NULL) */ |
| 320 | /* OBSOLETE { */ |
| 321 | /* OBSOLETE mi->msize = *msize; */ |
| 322 | /* OBSOLETE mi->msize_valid = 1; */ |
| 323 | /* OBSOLETE } */ |
| 324 | /* OBSOLETE if (mfp_used != NULL) */ |
| 325 | /* OBSOLETE { */ |
| 326 | /* OBSOLETE mi->mfp_used = *mfp_used; */ |
| 327 | /* OBSOLETE mi->mfp_valid = 1; */ |
| 328 | /* OBSOLETE } */ |
| 329 | /* OBSOLETE } */ |
| 330 | /* OBSOLETE return p; */ |
| 331 | /* OBSOLETE } */ |
| 332 | /* OBSOLETE */ |
| 333 | /* OBSOLETE /* Advance PC across any function entry prologue instructions */ |
| 334 | /* OBSOLETE to reach some "real" code. */ */ |
| 335 | /* OBSOLETE */ |
| 336 | /* OBSOLETE CORE_ADDR */ |
| 337 | /* OBSOLETE a29k_skip_prologue (CORE_ADDR pc) */ |
| 338 | /* OBSOLETE { */ |
| 339 | /* OBSOLETE return examine_prologue (pc, NULL, NULL, NULL); */ |
| 340 | /* OBSOLETE } */ |
| 341 | /* OBSOLETE */ |
| 342 | /* OBSOLETE /* */ |
| 343 | /* OBSOLETE * Examine the one or two word tag at the beginning of a function. */ |
| 344 | /* OBSOLETE * The tag word is expect to be at 'p', if it is not there, we fail */ |
| 345 | /* OBSOLETE * by returning 0. The documentation for the tag word was taken from */ |
| 346 | /* OBSOLETE * page 7-15 of the 29050 User's Manual. We are assuming that the */ |
| 347 | /* OBSOLETE * m bit is in bit 22 of the tag word, which seems to be the agreed upon */ |
| 348 | /* OBSOLETE * convention today (1/15/92). */ |
| 349 | /* OBSOLETE * msize is return in bytes. */ |
| 350 | /* OBSOLETE */ */ |
| 351 | /* OBSOLETE */ |
| 352 | /* OBSOLETE static int /* 0/1 - failure/success of finding the tag word */ */ |
| 353 | /* OBSOLETE examine_tag (CORE_ADDR p, int *is_trans, int *argcount, unsigned *msize, */ |
| 354 | /* OBSOLETE int *mfp_used) */ |
| 355 | /* OBSOLETE { */ |
| 356 | /* OBSOLETE unsigned int tag1, tag2; */ |
| 357 | /* OBSOLETE */ |
| 358 | /* OBSOLETE tag1 = read_memory_integer (p, 4); */ |
| 359 | /* OBSOLETE if ((tag1 & TAGWORD_ZERO_MASK) != 0) /* Not a tag word */ */ |
| 360 | /* OBSOLETE return 0; */ |
| 361 | /* OBSOLETE if (tag1 & (1 << 23)) /* A two word tag */ */ |
| 362 | /* OBSOLETE { */ |
| 363 | /* OBSOLETE tag2 = read_memory_integer (p - 4, 4); */ |
| 364 | /* OBSOLETE if (msize) */ |
| 365 | /* OBSOLETE *msize = tag2 * 2; */ |
| 366 | /* OBSOLETE } */ |
| 367 | /* OBSOLETE else */ |
| 368 | /* OBSOLETE /* A one word tag */ */ |
| 369 | /* OBSOLETE { */ |
| 370 | /* OBSOLETE if (msize) */ |
| 371 | /* OBSOLETE *msize = tag1 & 0x7ff; */ |
| 372 | /* OBSOLETE } */ |
| 373 | /* OBSOLETE if (is_trans) */ |
| 374 | /* OBSOLETE *is_trans = ((tag1 & (1 << 21)) ? 1 : 0); */ |
| 375 | /* OBSOLETE /* Note that this includes the frame pointer and the return address */ |
| 376 | /* OBSOLETE register, so the actual number of registers of arguments is two less. */ |
| 377 | /* OBSOLETE argcount can be zero, however, sometimes, for strange assembler */ |
| 378 | /* OBSOLETE routines. */ */ |
| 379 | /* OBSOLETE if (argcount) */ |
| 380 | /* OBSOLETE *argcount = (tag1 >> 16) & 0x1f; */ |
| 381 | /* OBSOLETE if (mfp_used) */ |
| 382 | /* OBSOLETE *mfp_used = ((tag1 & (1 << 22)) ? 1 : 0); */ |
| 383 | /* OBSOLETE return 1; */ |
| 384 | /* OBSOLETE } */ |
| 385 | /* OBSOLETE */ |
| 386 | /* OBSOLETE /* Initialize the frame. In addition to setting "extra" frame info, */ |
| 387 | /* OBSOLETE we also set ->frame because we use it in a nonstandard way, and ->pc */ |
| 388 | /* OBSOLETE because we need to know it to get the other stuff. See the diagram */ |
| 389 | /* OBSOLETE of stacks and the frame cache in tm-a29k.h for more detail. */ */ |
| 390 | /* OBSOLETE */ |
| 391 | /* OBSOLETE static void */ |
| 392 | /* OBSOLETE init_frame_info (int innermost_frame, struct frame_info *frame) */ |
| 393 | /* OBSOLETE { */ |
| 394 | /* OBSOLETE CORE_ADDR p; */ |
| 395 | /* OBSOLETE long insn; */ |
| 396 | /* OBSOLETE unsigned rsize; */ |
| 397 | /* OBSOLETE unsigned msize; */ |
| 398 | /* OBSOLETE int mfp_used, trans; */ |
| 399 | /* OBSOLETE struct symbol *func; */ |
| 400 | /* OBSOLETE */ |
| 401 | /* OBSOLETE p = frame->pc; */ |
| 402 | /* OBSOLETE */ |
| 403 | /* OBSOLETE if (innermost_frame) */ |
| 404 | /* OBSOLETE frame->frame = read_register (GR1_REGNUM); */ |
| 405 | /* OBSOLETE else */ |
| 406 | /* OBSOLETE frame->frame = frame->next->frame + frame->next->rsize; */ |
| 407 | /* OBSOLETE */ |
| 408 | /* OBSOLETE #if 0 /* CALL_DUMMY_LOCATION == ON_STACK */ */ |
| 409 | /* OBSOLETE This wont work; */ |
| 410 | /* OBSOLETE #else */ |
| 411 | /* OBSOLETE if (PC_IN_CALL_DUMMY (p, 0, 0)) */ |
| 412 | /* OBSOLETE #endif */ |
| 413 | /* OBSOLETE { */ |
| 414 | /* OBSOLETE frame->rsize = DUMMY_FRAME_RSIZE; */ |
| 415 | /* OBSOLETE /* This doesn't matter since we never try to get locals or args */ |
| 416 | /* OBSOLETE from a dummy frame. */ */ |
| 417 | /* OBSOLETE frame->msize = 0; */ |
| 418 | /* OBSOLETE /* Dummy frames always use a memory frame pointer. */ */ |
| 419 | /* OBSOLETE frame->saved_msp = */ |
| 420 | /* OBSOLETE read_register_stack_integer (frame->frame + DUMMY_FRAME_RSIZE - 4, 4); */ |
| 421 | /* OBSOLETE frame->flags |= (TRANSPARENT_FRAME | MFP_USED); */ |
| 422 | /* OBSOLETE return; */ |
| 423 | /* OBSOLETE } */ |
| 424 | /* OBSOLETE */ |
| 425 | /* OBSOLETE func = find_pc_function (p); */ |
| 426 | /* OBSOLETE if (func != NULL) */ |
| 427 | /* OBSOLETE p = BLOCK_START (SYMBOL_BLOCK_VALUE (func)); */ |
| 428 | /* OBSOLETE else */ |
| 429 | /* OBSOLETE { */ |
| 430 | /* OBSOLETE /* Search backward to find the trace-back tag. However, */ |
| 431 | /* OBSOLETE do not trace back beyond the start of the text segment */ |
| 432 | /* OBSOLETE (just as a sanity check to avoid going into never-never land). */ */ |
| 433 | /* OBSOLETE #if 1 */ |
| 434 | /* OBSOLETE while (p >= text_start */ |
| 435 | /* OBSOLETE && ((insn = read_memory_integer (p, 4)) & TAGWORD_ZERO_MASK) != 0) */ |
| 436 | /* OBSOLETE p -= 4; */ |
| 437 | /* OBSOLETE #else /* 0 */ */ |
| 438 | /* OBSOLETE char pat[4] = */ |
| 439 | /* OBSOLETE {0, 0, 0, 0}; */ |
| 440 | /* OBSOLETE char mask[4]; */ |
| 441 | /* OBSOLETE char insn_raw[4]; */ |
| 442 | /* OBSOLETE store_unsigned_integer (mask, 4, TAGWORD_ZERO_MASK); */ |
| 443 | /* OBSOLETE /* Enable this once target_search is enabled and tested. */ */ |
| 444 | /* OBSOLETE target_search (4, pat, mask, p, -4, text_start, p + 1, &p, &insn_raw); */ |
| 445 | /* OBSOLETE insn = extract_unsigned_integer (insn_raw, 4); */ |
| 446 | /* OBSOLETE #endif /* 0 */ */ |
| 447 | /* OBSOLETE */ |
| 448 | /* OBSOLETE if (p < text_start) */ |
| 449 | /* OBSOLETE { */ |
| 450 | /* OBSOLETE /* Couldn't find the trace-back tag. */ |
| 451 | /* OBSOLETE Something strange is going on. */ */ |
| 452 | /* OBSOLETE frame->saved_msp = 0; */ |
| 453 | /* OBSOLETE frame->rsize = 0; */ |
| 454 | /* OBSOLETE frame->msize = 0; */ |
| 455 | /* OBSOLETE frame->flags = TRANSPARENT_FRAME; */ |
| 456 | /* OBSOLETE return; */ |
| 457 | /* OBSOLETE } */ |
| 458 | /* OBSOLETE else */ |
| 459 | /* OBSOLETE /* Advance to the first word of the function, i.e. the word */ |
| 460 | /* OBSOLETE after the trace-back tag. */ */ |
| 461 | /* OBSOLETE p += 4; */ |
| 462 | /* OBSOLETE } */ |
| 463 | /* OBSOLETE */ |
| 464 | /* OBSOLETE /* We've found the start of the function. */ |
| 465 | /* OBSOLETE Try looking for a tag word that indicates whether there is a */ |
| 466 | /* OBSOLETE memory frame pointer and what the memory stack allocation is. */ |
| 467 | /* OBSOLETE If one doesn't exist, try using a more exhaustive search of */ |
| 468 | /* OBSOLETE the prologue. */ */ |
| 469 | /* OBSOLETE */ |
| 470 | /* OBSOLETE if (examine_tag (p - 4, &trans, (int *) NULL, &msize, &mfp_used)) /* Found good tag */ */ |
| 471 | /* OBSOLETE examine_prologue (p, &rsize, 0, 0); */ |
| 472 | /* OBSOLETE else /* No tag try prologue */ */ |
| 473 | /* OBSOLETE examine_prologue (p, &rsize, &msize, &mfp_used); */ |
| 474 | /* OBSOLETE */ |
| 475 | /* OBSOLETE frame->rsize = rsize; */ |
| 476 | /* OBSOLETE frame->msize = msize; */ |
| 477 | /* OBSOLETE frame->flags = 0; */ |
| 478 | /* OBSOLETE if (mfp_used) */ |
| 479 | /* OBSOLETE frame->flags |= MFP_USED; */ |
| 480 | /* OBSOLETE if (trans) */ |
| 481 | /* OBSOLETE frame->flags |= TRANSPARENT_FRAME; */ |
| 482 | /* OBSOLETE if (innermost_frame) */ |
| 483 | /* OBSOLETE { */ |
| 484 | /* OBSOLETE frame->saved_msp = read_register (MSP_REGNUM) + msize; */ |
| 485 | /* OBSOLETE } */ |
| 486 | /* OBSOLETE else */ |
| 487 | /* OBSOLETE { */ |
| 488 | /* OBSOLETE if (mfp_used) */ |
| 489 | /* OBSOLETE frame->saved_msp = */ |
| 490 | /* OBSOLETE read_register_stack_integer (frame->frame + rsize - 4, 4); */ |
| 491 | /* OBSOLETE else */ |
| 492 | /* OBSOLETE frame->saved_msp = frame->next->saved_msp + msize; */ |
| 493 | /* OBSOLETE } */ |
| 494 | /* OBSOLETE } */ |
| 495 | /* OBSOLETE */ |
| 496 | /* OBSOLETE void */ |
| 497 | /* OBSOLETE init_extra_frame_info (struct frame_info *frame) */ |
| 498 | /* OBSOLETE { */ |
| 499 | /* OBSOLETE if (frame->next == 0) */ |
| 500 | /* OBSOLETE /* Assume innermost frame. May produce strange results for "info frame" */ |
| 501 | /* OBSOLETE but there isn't any way to tell the difference. */ */ |
| 502 | /* OBSOLETE init_frame_info (1, frame); */ |
| 503 | /* OBSOLETE else */ |
| 504 | /* OBSOLETE { */ |
| 505 | /* OBSOLETE /* We're in get_prev_frame. */ |
| 506 | /* OBSOLETE Take care of everything in init_frame_pc. */ */ |
| 507 | /* OBSOLETE ; */ |
| 508 | /* OBSOLETE } */ |
| 509 | /* OBSOLETE } */ |
| 510 | /* OBSOLETE */ |
| 511 | /* OBSOLETE void */ |
| 512 | /* OBSOLETE init_frame_pc (int fromleaf, struct frame_info *frame) */ |
| 513 | /* OBSOLETE { */ |
| 514 | /* OBSOLETE frame->pc = (fromleaf ? SAVED_PC_AFTER_CALL (frame->next) : */ |
| 515 | /* OBSOLETE frame->next ? FRAME_SAVED_PC (frame->next) : read_pc ()); */ |
| 516 | /* OBSOLETE init_frame_info (fromleaf, frame); */ |
| 517 | /* OBSOLETE } */ |
| 518 | /* OBSOLETE \f */ |
| 519 | /* OBSOLETE /* Local variables (i.e. LOC_LOCAL) are on the memory stack, with their */ |
| 520 | /* OBSOLETE offsets being relative to the memory stack pointer (high C) or */ |
| 521 | /* OBSOLETE saved_msp (gcc). */ */ |
| 522 | /* OBSOLETE */ |
| 523 | /* OBSOLETE CORE_ADDR */ |
| 524 | /* OBSOLETE frame_locals_address (struct frame_info *fi) */ |
| 525 | /* OBSOLETE { */ |
| 526 | /* OBSOLETE if (fi->flags & MFP_USED) */ |
| 527 | /* OBSOLETE return fi->saved_msp; */ |
| 528 | /* OBSOLETE else */ |
| 529 | /* OBSOLETE return fi->saved_msp - fi->msize; */ |
| 530 | /* OBSOLETE } */ |
| 531 | /* OBSOLETE \f */ |
| 532 | /* OBSOLETE /* Routines for reading the register stack. The caller gets to treat */ |
| 533 | /* OBSOLETE the register stack as a uniform stack in memory, from address $gr1 */ |
| 534 | /* OBSOLETE straight through $rfb and beyond. */ */ |
| 535 | /* OBSOLETE */ |
| 536 | /* OBSOLETE /* Analogous to read_memory except the length is understood to be 4. */ |
| 537 | /* OBSOLETE Also, myaddr can be NULL (meaning don't bother to read), and */ |
| 538 | /* OBSOLETE if actual_mem_addr is non-NULL, store there the address that it */ |
| 539 | /* OBSOLETE was fetched from (or if from a register the offset within */ |
| 540 | /* OBSOLETE registers). Set *LVAL to lval_memory or lval_register, depending */ |
| 541 | /* OBSOLETE on where it came from. The contents written into MYADDR are in */ |
| 542 | /* OBSOLETE target format. */ */ |
| 543 | /* OBSOLETE void */ |
| 544 | /* OBSOLETE read_register_stack (CORE_ADDR memaddr, char *myaddr, */ |
| 545 | /* OBSOLETE CORE_ADDR *actual_mem_addr, enum lval_type *lval) */ |
| 546 | /* OBSOLETE { */ |
| 547 | /* OBSOLETE long rfb = read_register (RFB_REGNUM); */ |
| 548 | /* OBSOLETE long rsp = read_register (RSP_REGNUM); */ |
| 549 | /* OBSOLETE */ |
| 550 | /* OBSOLETE /* If we don't do this 'info register' stops in the middle. */ */ |
| 551 | /* OBSOLETE if (memaddr >= rstack_high_address) */ |
| 552 | /* OBSOLETE { */ |
| 553 | /* OBSOLETE /* a bogus value */ */ |
| 554 | /* OBSOLETE static char val[] = */ |
| 555 | /* OBSOLETE {~0, ~0, ~0, ~0}; */ |
| 556 | /* OBSOLETE /* It's in a local register, but off the end of the stack. */ */ |
| 557 | /* OBSOLETE int regnum = (memaddr - rsp) / 4 + LR0_REGNUM; */ |
| 558 | /* OBSOLETE if (myaddr != NULL) */ |
| 559 | /* OBSOLETE { */ |
| 560 | /* OBSOLETE /* Provide bogusness */ */ |
| 561 | /* OBSOLETE memcpy (myaddr, val, 4); */ |
| 562 | /* OBSOLETE } */ |
| 563 | /* OBSOLETE supply_register (regnum, val); /* More bogusness */ */ |
| 564 | /* OBSOLETE if (lval != NULL) */ |
| 565 | /* OBSOLETE *lval = lval_register; */ |
| 566 | /* OBSOLETE if (actual_mem_addr != NULL) */ |
| 567 | /* OBSOLETE *actual_mem_addr = REGISTER_BYTE (regnum); */ |
| 568 | /* OBSOLETE } */ |
| 569 | /* OBSOLETE /* If it's in the part of the register stack that's in real registers, */ |
| 570 | /* OBSOLETE get the value from the registers. If it's anywhere else in memory */ |
| 571 | /* OBSOLETE (e.g. in another thread's saved stack), skip this part and get */ |
| 572 | /* OBSOLETE it from real live memory. */ */ |
| 573 | /* OBSOLETE else if (memaddr < rfb && memaddr >= rsp) */ |
| 574 | /* OBSOLETE { */ |
| 575 | /* OBSOLETE /* It's in a register. */ */ |
| 576 | /* OBSOLETE int regnum = (memaddr - rsp) / 4 + LR0_REGNUM; */ |
| 577 | /* OBSOLETE if (regnum > LR0_REGNUM + 127) */ |
| 578 | /* OBSOLETE error ("Attempt to read register stack out of range."); */ |
| 579 | /* OBSOLETE if (myaddr != NULL) */ |
| 580 | /* OBSOLETE read_register_gen (regnum, myaddr); */ |
| 581 | /* OBSOLETE if (lval != NULL) */ |
| 582 | /* OBSOLETE *lval = lval_register; */ |
| 583 | /* OBSOLETE if (actual_mem_addr != NULL) */ |
| 584 | /* OBSOLETE *actual_mem_addr = REGISTER_BYTE (regnum); */ |
| 585 | /* OBSOLETE } */ |
| 586 | /* OBSOLETE else */ |
| 587 | /* OBSOLETE { */ |
| 588 | /* OBSOLETE /* It's in the memory portion of the register stack. */ */ |
| 589 | /* OBSOLETE if (myaddr != NULL) */ |
| 590 | /* OBSOLETE read_memory (memaddr, myaddr, 4); */ |
| 591 | /* OBSOLETE if (lval != NULL) */ |
| 592 | /* OBSOLETE *lval = lval_memory; */ |
| 593 | /* OBSOLETE if (actual_mem_addr != NULL) */ |
| 594 | /* OBSOLETE *actual_mem_addr = memaddr; */ |
| 595 | /* OBSOLETE } */ |
| 596 | /* OBSOLETE } */ |
| 597 | /* OBSOLETE */ |
| 598 | /* OBSOLETE /* Analogous to read_memory_integer */ |
| 599 | /* OBSOLETE except the length is understood to be 4. */ */ |
| 600 | /* OBSOLETE long */ |
| 601 | /* OBSOLETE read_register_stack_integer (CORE_ADDR memaddr, int len) */ |
| 602 | /* OBSOLETE { */ |
| 603 | /* OBSOLETE char buf[4]; */ |
| 604 | /* OBSOLETE read_register_stack (memaddr, buf, NULL, NULL); */ |
| 605 | /* OBSOLETE return extract_signed_integer (buf, 4); */ |
| 606 | /* OBSOLETE } */ |
| 607 | /* OBSOLETE */ |
| 608 | /* OBSOLETE /* Copy 4 bytes from GDB memory at MYADDR into inferior memory */ |
| 609 | /* OBSOLETE at MEMADDR and put the actual address written into in */ |
| 610 | /* OBSOLETE *ACTUAL_MEM_ADDR. */ */ |
| 611 | /* OBSOLETE static void */ |
| 612 | /* OBSOLETE write_register_stack (CORE_ADDR memaddr, char *myaddr, */ |
| 613 | /* OBSOLETE CORE_ADDR *actual_mem_addr) */ |
| 614 | /* OBSOLETE { */ |
| 615 | /* OBSOLETE long rfb = read_register (RFB_REGNUM); */ |
| 616 | /* OBSOLETE long rsp = read_register (RSP_REGNUM); */ |
| 617 | /* OBSOLETE /* If we don't do this 'info register' stops in the middle. */ */ |
| 618 | /* OBSOLETE if (memaddr >= rstack_high_address) */ |
| 619 | /* OBSOLETE { */ |
| 620 | /* OBSOLETE /* It's in a register, but off the end of the stack. */ */ |
| 621 | /* OBSOLETE if (actual_mem_addr != NULL) */ |
| 622 | /* OBSOLETE *actual_mem_addr = 0; */ |
| 623 | /* OBSOLETE } */ |
| 624 | /* OBSOLETE else if (memaddr < rfb) */ |
| 625 | /* OBSOLETE { */ |
| 626 | /* OBSOLETE /* It's in a register. */ */ |
| 627 | /* OBSOLETE int regnum = (memaddr - rsp) / 4 + LR0_REGNUM; */ |
| 628 | /* OBSOLETE if (regnum < LR0_REGNUM || regnum > LR0_REGNUM + 127) */ |
| 629 | /* OBSOLETE error ("Attempt to read register stack out of range."); */ |
| 630 | /* OBSOLETE if (myaddr != NULL) */ |
| 631 | /* OBSOLETE write_register (regnum, *(long *) myaddr); */ |
| 632 | /* OBSOLETE if (actual_mem_addr != NULL) */ |
| 633 | /* OBSOLETE *actual_mem_addr = 0; */ |
| 634 | /* OBSOLETE } */ |
| 635 | /* OBSOLETE else */ |
| 636 | /* OBSOLETE { */ |
| 637 | /* OBSOLETE /* It's in the memory portion of the register stack. */ */ |
| 638 | /* OBSOLETE if (myaddr != NULL) */ |
| 639 | /* OBSOLETE write_memory (memaddr, myaddr, 4); */ |
| 640 | /* OBSOLETE if (actual_mem_addr != NULL) */ |
| 641 | /* OBSOLETE *actual_mem_addr = memaddr; */ |
| 642 | /* OBSOLETE } */ |
| 643 | /* OBSOLETE } */ |
| 644 | /* OBSOLETE \f */ |
| 645 | /* OBSOLETE /* Find register number REGNUM relative to FRAME and put its */ |
| 646 | /* OBSOLETE (raw) contents in *RAW_BUFFER. Set *OPTIMIZED if the variable */ |
| 647 | /* OBSOLETE was optimized out (and thus can't be fetched). If the variable */ |
| 648 | /* OBSOLETE was fetched from memory, set *ADDRP to where it was fetched from, */ |
| 649 | /* OBSOLETE otherwise it was fetched from a register. */ |
| 650 | /* OBSOLETE */ |
| 651 | /* OBSOLETE The argument RAW_BUFFER must point to aligned memory. */ */ |
| 652 | /* OBSOLETE */ |
| 653 | /* OBSOLETE void */ |
| 654 | /* OBSOLETE a29k_get_saved_register (char *raw_buffer, int *optimized, CORE_ADDR *addrp, */ |
| 655 | /* OBSOLETE struct frame_info *frame, int regnum, */ |
| 656 | /* OBSOLETE enum lval_type *lvalp) */ |
| 657 | /* OBSOLETE { */ |
| 658 | /* OBSOLETE struct frame_info *fi; */ |
| 659 | /* OBSOLETE CORE_ADDR addr; */ |
| 660 | /* OBSOLETE enum lval_type lval; */ |
| 661 | /* OBSOLETE */ |
| 662 | /* OBSOLETE if (!target_has_registers) */ |
| 663 | /* OBSOLETE error ("No registers."); */ |
| 664 | /* OBSOLETE */ |
| 665 | /* OBSOLETE /* Probably now redundant with the target_has_registers check. */ */ |
| 666 | /* OBSOLETE if (frame == 0) */ |
| 667 | /* OBSOLETE return; */ |
| 668 | /* OBSOLETE */ |
| 669 | /* OBSOLETE /* Once something has a register number, it doesn't get optimized out. */ */ |
| 670 | /* OBSOLETE if (optimized != NULL) */ |
| 671 | /* OBSOLETE *optimized = 0; */ |
| 672 | /* OBSOLETE if (regnum == RSP_REGNUM) */ |
| 673 | /* OBSOLETE { */ |
| 674 | /* OBSOLETE if (raw_buffer != NULL) */ |
| 675 | /* OBSOLETE { */ |
| 676 | /* OBSOLETE store_address (raw_buffer, REGISTER_RAW_SIZE (regnum), frame->frame); */ |
| 677 | /* OBSOLETE } */ |
| 678 | /* OBSOLETE if (lvalp != NULL) */ |
| 679 | /* OBSOLETE *lvalp = not_lval; */ |
| 680 | /* OBSOLETE return; */ |
| 681 | /* OBSOLETE } */ |
| 682 | /* OBSOLETE else if (regnum == PC_REGNUM && frame->next != NULL) */ |
| 683 | /* OBSOLETE { */ |
| 684 | /* OBSOLETE if (raw_buffer != NULL) */ |
| 685 | /* OBSOLETE { */ |
| 686 | /* OBSOLETE store_address (raw_buffer, REGISTER_RAW_SIZE (regnum), frame->pc); */ |
| 687 | /* OBSOLETE } */ |
| 688 | /* OBSOLETE */ |
| 689 | /* OBSOLETE /* Not sure we have to do this. */ */ |
| 690 | /* OBSOLETE if (lvalp != NULL) */ |
| 691 | /* OBSOLETE *lvalp = not_lval; */ |
| 692 | /* OBSOLETE */ |
| 693 | /* OBSOLETE return; */ |
| 694 | /* OBSOLETE } */ |
| 695 | /* OBSOLETE else if (regnum == MSP_REGNUM) */ |
| 696 | /* OBSOLETE { */ |
| 697 | /* OBSOLETE if (raw_buffer != NULL) */ |
| 698 | /* OBSOLETE { */ |
| 699 | /* OBSOLETE if (frame->next != NULL) */ |
| 700 | /* OBSOLETE { */ |
| 701 | /* OBSOLETE store_address (raw_buffer, REGISTER_RAW_SIZE (regnum), */ |
| 702 | /* OBSOLETE frame->next->saved_msp); */ |
| 703 | /* OBSOLETE } */ |
| 704 | /* OBSOLETE else */ |
| 705 | /* OBSOLETE read_register_gen (MSP_REGNUM, raw_buffer); */ |
| 706 | /* OBSOLETE } */ |
| 707 | /* OBSOLETE /* The value may have been computed, not fetched. */ */ |
| 708 | /* OBSOLETE if (lvalp != NULL) */ |
| 709 | /* OBSOLETE *lvalp = not_lval; */ |
| 710 | /* OBSOLETE return; */ |
| 711 | /* OBSOLETE } */ |
| 712 | /* OBSOLETE else if (regnum < LR0_REGNUM || regnum >= LR0_REGNUM + 128) */ |
| 713 | /* OBSOLETE { */ |
| 714 | /* OBSOLETE /* These registers are not saved over procedure calls, */ |
| 715 | /* OBSOLETE so just print out the current values. */ */ |
| 716 | /* OBSOLETE if (raw_buffer != NULL) */ |
| 717 | /* OBSOLETE read_register_gen (regnum, raw_buffer); */ |
| 718 | /* OBSOLETE if (lvalp != NULL) */ |
| 719 | /* OBSOLETE *lvalp = lval_register; */ |
| 720 | /* OBSOLETE if (addrp != NULL) */ |
| 721 | /* OBSOLETE *addrp = REGISTER_BYTE (regnum); */ |
| 722 | /* OBSOLETE return; */ |
| 723 | /* OBSOLETE } */ |
| 724 | /* OBSOLETE */ |
| 725 | /* OBSOLETE addr = frame->frame + (regnum - LR0_REGNUM) * 4; */ |
| 726 | /* OBSOLETE if (raw_buffer != NULL) */ |
| 727 | /* OBSOLETE read_register_stack (addr, raw_buffer, &addr, &lval); */ |
| 728 | /* OBSOLETE if (lvalp != NULL) */ |
| 729 | /* OBSOLETE *lvalp = lval; */ |
| 730 | /* OBSOLETE if (addrp != NULL) */ |
| 731 | /* OBSOLETE *addrp = addr; */ |
| 732 | /* OBSOLETE } */ |
| 733 | /* OBSOLETE \f */ |
| 734 | /* OBSOLETE */ |
| 735 | /* OBSOLETE /* Discard from the stack the innermost frame, */ |
| 736 | /* OBSOLETE restoring all saved registers. */ */ |
| 737 | /* OBSOLETE */ |
| 738 | /* OBSOLETE void */ |
| 739 | /* OBSOLETE pop_frame (void) */ |
| 740 | /* OBSOLETE { */ |
| 741 | /* OBSOLETE struct frame_info *frame = get_current_frame (); */ |
| 742 | /* OBSOLETE CORE_ADDR rfb = read_register (RFB_REGNUM); */ |
| 743 | /* OBSOLETE CORE_ADDR gr1 = frame->frame + frame->rsize; */ |
| 744 | /* OBSOLETE CORE_ADDR lr1; */ |
| 745 | /* OBSOLETE CORE_ADDR original_lr0; */ |
| 746 | /* OBSOLETE int must_fix_lr0 = 0; */ |
| 747 | /* OBSOLETE int i; */ |
| 748 | /* OBSOLETE */ |
| 749 | /* OBSOLETE /* If popping a dummy frame, need to restore registers. */ */ |
| 750 | /* OBSOLETE if (PC_IN_CALL_DUMMY (read_register (PC_REGNUM), */ |
| 751 | /* OBSOLETE read_register (SP_REGNUM), */ |
| 752 | /* OBSOLETE FRAME_FP (frame))) */ |
| 753 | /* OBSOLETE { */ |
| 754 | /* OBSOLETE int lrnum = LR0_REGNUM + DUMMY_ARG / 4; */ |
| 755 | /* OBSOLETE for (i = 0; i < DUMMY_SAVE_SR128; ++i) */ |
| 756 | /* OBSOLETE write_register (SR_REGNUM (i + 128), read_register (lrnum++)); */ |
| 757 | /* OBSOLETE for (i = 0; i < DUMMY_SAVE_SR160; ++i) */ |
| 758 | /* OBSOLETE write_register (SR_REGNUM (i + 160), read_register (lrnum++)); */ |
| 759 | /* OBSOLETE for (i = 0; i < DUMMY_SAVE_GREGS; ++i) */ |
| 760 | /* OBSOLETE write_register (RETURN_REGNUM + i, read_register (lrnum++)); */ |
| 761 | /* OBSOLETE /* Restore the PCs and prepare to restore LR0. */ */ |
| 762 | /* OBSOLETE write_register (PC_REGNUM, read_register (lrnum++)); */ |
| 763 | /* OBSOLETE write_register (NPC_REGNUM, read_register (lrnum++)); */ |
| 764 | /* OBSOLETE write_register (PC2_REGNUM, read_register (lrnum++)); */ |
| 765 | /* OBSOLETE original_lr0 = read_register (lrnum++); */ |
| 766 | /* OBSOLETE must_fix_lr0 = 1; */ |
| 767 | /* OBSOLETE } */ |
| 768 | /* OBSOLETE */ |
| 769 | /* OBSOLETE /* Restore the memory stack pointer. */ */ |
| 770 | /* OBSOLETE write_register (MSP_REGNUM, frame->saved_msp); */ |
| 771 | /* OBSOLETE /* Restore the register stack pointer. */ */ |
| 772 | /* OBSOLETE write_register (GR1_REGNUM, gr1); */ |
| 773 | /* OBSOLETE */ |
| 774 | /* OBSOLETE /* If we popped a dummy frame, restore lr0 now that gr1 has been restored. */ */ |
| 775 | /* OBSOLETE if (must_fix_lr0) */ |
| 776 | /* OBSOLETE write_register (LR0_REGNUM, original_lr0); */ |
| 777 | /* OBSOLETE */ |
| 778 | /* OBSOLETE /* Check whether we need to fill registers. */ */ |
| 779 | /* OBSOLETE lr1 = read_register (LR0_REGNUM + 1); */ |
| 780 | /* OBSOLETE if (lr1 > rfb) */ |
| 781 | /* OBSOLETE { */ |
| 782 | /* OBSOLETE /* Fill. */ */ |
| 783 | /* OBSOLETE int num_bytes = lr1 - rfb; */ |
| 784 | /* OBSOLETE int i; */ |
| 785 | /* OBSOLETE long word; */ |
| 786 | /* OBSOLETE */ |
| 787 | /* OBSOLETE write_register (RAB_REGNUM, read_register (RAB_REGNUM) + num_bytes); */ |
| 788 | /* OBSOLETE write_register (RFB_REGNUM, lr1); */ |
| 789 | /* OBSOLETE for (i = 0; i < num_bytes; i += 4) */ |
| 790 | /* OBSOLETE { */ |
| 791 | /* OBSOLETE /* Note: word is in host byte order. */ */ |
| 792 | /* OBSOLETE word = read_memory_integer (rfb + i, 4); */ |
| 793 | /* OBSOLETE write_register (LR0_REGNUM + ((rfb - gr1) % 0x80) + i / 4, word); */ |
| 794 | /* OBSOLETE } */ |
| 795 | /* OBSOLETE } */ |
| 796 | /* OBSOLETE flush_cached_frames (); */ |
| 797 | /* OBSOLETE } */ |
| 798 | /* OBSOLETE */ |
| 799 | /* OBSOLETE /* Push an empty stack frame, to record the current PC, etc. */ */ |
| 800 | /* OBSOLETE */ |
| 801 | /* OBSOLETE void */ |
| 802 | /* OBSOLETE push_dummy_frame (void) */ |
| 803 | /* OBSOLETE { */ |
| 804 | /* OBSOLETE long w; */ |
| 805 | /* OBSOLETE CORE_ADDR rab, gr1; */ |
| 806 | /* OBSOLETE CORE_ADDR msp = read_register (MSP_REGNUM); */ |
| 807 | /* OBSOLETE int lrnum, i; */ |
| 808 | /* OBSOLETE CORE_ADDR original_lr0; */ |
| 809 | /* OBSOLETE */ |
| 810 | /* OBSOLETE /* Read original lr0 before changing gr1. This order isn't really needed */ |
| 811 | /* OBSOLETE since GDB happens to have a snapshot of all the regs and doesn't toss */ |
| 812 | /* OBSOLETE it when gr1 is changed. But it's The Right Thing To Do. */ */ |
| 813 | /* OBSOLETE original_lr0 = read_register (LR0_REGNUM); */ |
| 814 | /* OBSOLETE */ |
| 815 | /* OBSOLETE /* Allocate the new frame. */ */ |
| 816 | /* OBSOLETE gr1 = read_register (GR1_REGNUM) - DUMMY_FRAME_RSIZE; */ |
| 817 | /* OBSOLETE write_register (GR1_REGNUM, gr1); */ |
| 818 | /* OBSOLETE */ |
| 819 | /* OBSOLETE #ifdef VXWORKS_TARGET */ |
| 820 | /* OBSOLETE /* We force re-reading all registers to get the new local registers set */ |
| 821 | /* OBSOLETE after gr1 has been modified. This fix is due to the lack of single */ |
| 822 | /* OBSOLETE register read/write operation in the RPC interface between VxGDB and */ |
| 823 | /* OBSOLETE VxWorks. This really must be changed ! */ */ |
| 824 | /* OBSOLETE */ |
| 825 | /* OBSOLETE vx_read_register (-1); */ |
| 826 | /* OBSOLETE */ |
| 827 | /* OBSOLETE #endif /* VXWORK_TARGET */ */ |
| 828 | /* OBSOLETE */ |
| 829 | /* OBSOLETE rab = read_register (RAB_REGNUM); */ |
| 830 | /* OBSOLETE if (gr1 < rab) */ |
| 831 | /* OBSOLETE { */ |
| 832 | /* OBSOLETE /* We need to spill registers. */ */ |
| 833 | /* OBSOLETE int num_bytes = rab - gr1; */ |
| 834 | /* OBSOLETE CORE_ADDR rfb = read_register (RFB_REGNUM); */ |
| 835 | /* OBSOLETE int i; */ |
| 836 | /* OBSOLETE long word; */ |
| 837 | /* OBSOLETE */ |
| 838 | /* OBSOLETE write_register (RFB_REGNUM, rfb - num_bytes); */ |
| 839 | /* OBSOLETE write_register (RAB_REGNUM, gr1); */ |
| 840 | /* OBSOLETE for (i = 0; i < num_bytes; i += 4) */ |
| 841 | /* OBSOLETE { */ |
| 842 | /* OBSOLETE /* Note: word is in target byte order. */ */ |
| 843 | /* OBSOLETE read_register_gen (LR0_REGNUM + i / 4, (char *) &word); */ |
| 844 | /* OBSOLETE write_memory (rfb - num_bytes + i, (char *) &word, 4); */ |
| 845 | /* OBSOLETE } */ |
| 846 | /* OBSOLETE } */ |
| 847 | /* OBSOLETE */ |
| 848 | /* OBSOLETE /* There are no arguments in to the dummy frame, so we don't need */ |
| 849 | /* OBSOLETE more than rsize plus the return address and lr1. */ */ |
| 850 | /* OBSOLETE write_register (LR0_REGNUM + 1, gr1 + DUMMY_FRAME_RSIZE + 2 * 4); */ |
| 851 | /* OBSOLETE */ |
| 852 | /* OBSOLETE /* Set the memory frame pointer. */ */ |
| 853 | /* OBSOLETE write_register (LR0_REGNUM + DUMMY_FRAME_RSIZE / 4 - 1, msp); */ |
| 854 | /* OBSOLETE */ |
| 855 | /* OBSOLETE /* Allocate arg_slop. */ */ |
| 856 | /* OBSOLETE write_register (MSP_REGNUM, msp - 16 * 4); */ |
| 857 | /* OBSOLETE */ |
| 858 | /* OBSOLETE /* Save registers. */ */ |
| 859 | /* OBSOLETE lrnum = LR0_REGNUM + DUMMY_ARG / 4; */ |
| 860 | /* OBSOLETE for (i = 0; i < DUMMY_SAVE_SR128; ++i) */ |
| 861 | /* OBSOLETE write_register (lrnum++, read_register (SR_REGNUM (i + 128))); */ |
| 862 | /* OBSOLETE for (i = 0; i < DUMMY_SAVE_SR160; ++i) */ |
| 863 | /* OBSOLETE write_register (lrnum++, read_register (SR_REGNUM (i + 160))); */ |
| 864 | /* OBSOLETE for (i = 0; i < DUMMY_SAVE_GREGS; ++i) */ |
| 865 | /* OBSOLETE write_register (lrnum++, read_register (RETURN_REGNUM + i)); */ |
| 866 | /* OBSOLETE /* Save the PCs and LR0. */ */ |
| 867 | /* OBSOLETE write_register (lrnum++, read_register (PC_REGNUM)); */ |
| 868 | /* OBSOLETE write_register (lrnum++, read_register (NPC_REGNUM)); */ |
| 869 | /* OBSOLETE write_register (lrnum++, read_register (PC2_REGNUM)); */ |
| 870 | /* OBSOLETE */ |
| 871 | /* OBSOLETE /* Why are we saving LR0? What would clobber it? (the dummy frame should */ |
| 872 | /* OBSOLETE be below it on the register stack, no?). */ */ |
| 873 | /* OBSOLETE write_register (lrnum++, original_lr0); */ |
| 874 | /* OBSOLETE } */ |
| 875 | /* OBSOLETE */ |
| 876 | /* OBSOLETE */ |
| 877 | /* OBSOLETE */ |
| 878 | /* OBSOLETE /* */ |
| 879 | /* OBSOLETE This routine takes three arguments and makes the cached frames look */ |
| 880 | /* OBSOLETE as if these arguments defined a frame on the cache. This allows the */ |
| 881 | /* OBSOLETE rest of `info frame' to extract the important arguments without much */ |
| 882 | /* OBSOLETE difficulty. Since an individual frame on the 29K is determined by */ |
| 883 | /* OBSOLETE three values (FP, PC, and MSP), we really need all three to do a */ |
| 884 | /* OBSOLETE good job. */ */ |
| 885 | /* OBSOLETE */ |
| 886 | /* OBSOLETE struct frame_info * */ |
| 887 | /* OBSOLETE setup_arbitrary_frame (int argc, CORE_ADDR *argv) */ |
| 888 | /* OBSOLETE { */ |
| 889 | /* OBSOLETE struct frame_info *frame; */ |
| 890 | /* OBSOLETE */ |
| 891 | /* OBSOLETE if (argc != 3) */ |
| 892 | /* OBSOLETE error ("AMD 29k frame specifications require three arguments: rsp pc msp"); */ |
| 893 | /* OBSOLETE */ |
| 894 | /* OBSOLETE frame = create_new_frame (argv[0], argv[1]); */ |
| 895 | /* OBSOLETE */ |
| 896 | /* OBSOLETE if (!frame) */ |
| 897 | /* OBSOLETE internal_error (__FILE__, __LINE__, */ |
| 898 | /* OBSOLETE "create_new_frame returned invalid frame id"); */ |
| 899 | /* OBSOLETE */ |
| 900 | /* OBSOLETE /* Creating a new frame munges the `frame' value from the current */ |
| 901 | /* OBSOLETE GR1, so we restore it again here. FIXME, untangle all this */ |
| 902 | /* OBSOLETE 29K frame stuff... */ */ |
| 903 | /* OBSOLETE frame->frame = argv[0]; */ |
| 904 | /* OBSOLETE */ |
| 905 | /* OBSOLETE /* Our MSP is in argv[2]. It'd be intelligent if we could just */ |
| 906 | /* OBSOLETE save this value in the FRAME. But the way it's set up (FIXME), */ |
| 907 | /* OBSOLETE we must save our caller's MSP. We compute that by adding our */ |
| 908 | /* OBSOLETE memory stack frame size to our MSP. */ */ |
| 909 | /* OBSOLETE frame->saved_msp = argv[2] + frame->msize; */ |
| 910 | /* OBSOLETE */ |
| 911 | /* OBSOLETE return frame; */ |
| 912 | /* OBSOLETE } */ |
| 913 | /* OBSOLETE */ |
| 914 | /* OBSOLETE int */ |
| 915 | /* OBSOLETE gdb_print_insn_a29k (bfd_vma memaddr, disassemble_info *info) */ |
| 916 | /* OBSOLETE { */ |
| 917 | /* OBSOLETE if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG) */ |
| 918 | /* OBSOLETE return print_insn_big_a29k (memaddr, info); */ |
| 919 | /* OBSOLETE else */ |
| 920 | /* OBSOLETE return print_insn_little_a29k (memaddr, info); */ |
| 921 | /* OBSOLETE } */ |
| 922 | /* OBSOLETE */ |
| 923 | /* OBSOLETE enum a29k_processor_types processor_type = a29k_unknown; */ |
| 924 | /* OBSOLETE */ |
| 925 | /* OBSOLETE void */ |
| 926 | /* OBSOLETE a29k_get_processor_type (void) */ |
| 927 | /* OBSOLETE { */ |
| 928 | /* OBSOLETE unsigned int cfg_reg = (unsigned int) read_register (CFG_REGNUM); */ |
| 929 | /* OBSOLETE */ |
| 930 | /* OBSOLETE /* Most of these don't have freeze mode. */ */ |
| 931 | /* OBSOLETE processor_type = a29k_no_freeze_mode; */ |
| 932 | /* OBSOLETE */ |
| 933 | /* OBSOLETE switch ((cfg_reg >> 28) & 0xf) */ |
| 934 | /* OBSOLETE { */ |
| 935 | /* OBSOLETE case 0: */ |
| 936 | /* OBSOLETE fprintf_filtered (gdb_stderr, "Remote debugging an Am29000"); */ |
| 937 | /* OBSOLETE break; */ |
| 938 | /* OBSOLETE case 1: */ |
| 939 | /* OBSOLETE fprintf_filtered (gdb_stderr, "Remote debugging an Am29005"); */ |
| 940 | /* OBSOLETE break; */ |
| 941 | /* OBSOLETE case 2: */ |
| 942 | /* OBSOLETE fprintf_filtered (gdb_stderr, "Remote debugging an Am29050"); */ |
| 943 | /* OBSOLETE processor_type = a29k_freeze_mode; */ |
| 944 | /* OBSOLETE break; */ |
| 945 | /* OBSOLETE case 3: */ |
| 946 | /* OBSOLETE fprintf_filtered (gdb_stderr, "Remote debugging an Am29035"); */ |
| 947 | /* OBSOLETE break; */ |
| 948 | /* OBSOLETE case 4: */ |
| 949 | /* OBSOLETE fprintf_filtered (gdb_stderr, "Remote debugging an Am29030"); */ |
| 950 | /* OBSOLETE break; */ |
| 951 | /* OBSOLETE case 5: */ |
| 952 | /* OBSOLETE fprintf_filtered (gdb_stderr, "Remote debugging an Am2920*"); */ |
| 953 | /* OBSOLETE break; */ |
| 954 | /* OBSOLETE case 6: */ |
| 955 | /* OBSOLETE fprintf_filtered (gdb_stderr, "Remote debugging an Am2924*"); */ |
| 956 | /* OBSOLETE break; */ |
| 957 | /* OBSOLETE case 7: */ |
| 958 | /* OBSOLETE fprintf_filtered (gdb_stderr, "Remote debugging an Am29040"); */ |
| 959 | /* OBSOLETE break; */ |
| 960 | /* OBSOLETE default: */ |
| 961 | /* OBSOLETE fprintf_filtered (gdb_stderr, "Remote debugging an unknown Am29k\n"); */ |
| 962 | /* OBSOLETE /* Don't bother to print the revision. */ */ |
| 963 | /* OBSOLETE return; */ |
| 964 | /* OBSOLETE } */ |
| 965 | /* OBSOLETE fprintf_filtered (gdb_stderr, " revision %c\n", 'A' + ((cfg_reg >> 24) & 0x0f)); */ |
| 966 | /* OBSOLETE } */ |
| 967 | /* OBSOLETE */ |
| 968 | /* OBSOLETE #ifdef GET_LONGJMP_TARGET */ |
| 969 | /* OBSOLETE /* Figure out where the longjmp will land. We expect that we have just entered */ |
| 970 | /* OBSOLETE longjmp and haven't yet setup the stack frame, so the args are still in the */ |
| 971 | /* OBSOLETE output regs. lr2 (LR2_REGNUM) points at the jmp_buf structure from which we */ |
| 972 | /* OBSOLETE extract the pc (JB_PC) that we will land at. The pc is copied into ADDR. */ |
| 973 | /* OBSOLETE This routine returns true on success */ */ |
| 974 | /* OBSOLETE */ |
| 975 | /* OBSOLETE int */ |
| 976 | /* OBSOLETE get_longjmp_target (CORE_ADDR *pc) */ |
| 977 | /* OBSOLETE { */ |
| 978 | /* OBSOLETE CORE_ADDR jb_addr; */ |
| 979 | /* OBSOLETE char buf[sizeof (CORE_ADDR)]; */ |
| 980 | /* OBSOLETE */ |
| 981 | /* OBSOLETE jb_addr = read_register (LR2_REGNUM); */ |
| 982 | /* OBSOLETE */ |
| 983 | /* OBSOLETE if (target_read_memory (jb_addr + JB_PC * JB_ELEMENT_SIZE, (char *) buf, */ |
| 984 | /* OBSOLETE sizeof (CORE_ADDR))) */ |
| 985 | /* OBSOLETE return 0; */ |
| 986 | /* OBSOLETE */ |
| 987 | /* OBSOLETE *pc = extract_address ((PTR) buf, sizeof (CORE_ADDR)); */ |
| 988 | /* OBSOLETE return 1; */ |
| 989 | /* OBSOLETE } */ |
| 990 | /* OBSOLETE #endif /* GET_LONGJMP_TARGET */ */ |
| 991 | /* OBSOLETE */ |
| 992 | /* OBSOLETE void */ |
| 993 | /* OBSOLETE _initialize_a29k_tdep (void) */ |
| 994 | /* OBSOLETE { */ |
| 995 | /* OBSOLETE extern CORE_ADDR text_end; */ |
| 996 | /* OBSOLETE */ |
| 997 | /* OBSOLETE tm_print_insn = gdb_print_insn_a29k; */ |
| 998 | /* OBSOLETE */ |
| 999 | /* OBSOLETE /* FIXME, there should be a way to make a CORE_ADDR variable settable. */ */ |
| 1000 | /* OBSOLETE add_show_from_set */ |
| 1001 | /* OBSOLETE (add_set_cmd ("rstack_high_address", class_support, var_uinteger, */ |
| 1002 | /* OBSOLETE (char *) &rstack_high_address, */ |
| 1003 | /* OBSOLETE "Set top address in memory of the register stack.\n\ */ |
| 1004 | /* OBSOLETE Attempts to access registers saved above this address will be ignored\n\ */ |
| 1005 | /* OBSOLETE or will produce the value -1.", &setlist), */ |
| 1006 | /* OBSOLETE &showlist); */ |
| 1007 | /* OBSOLETE */ |
| 1008 | /* OBSOLETE /* FIXME, there should be a way to make a CORE_ADDR variable settable. */ */ |
| 1009 | /* OBSOLETE add_show_from_set */ |
| 1010 | /* OBSOLETE (add_set_cmd ("call_scratch_address", class_support, var_uinteger, */ |
| 1011 | /* OBSOLETE (char *) &text_end, */ |
| 1012 | /* OBSOLETE "Set address in memory where small amounts of RAM can be used\n\ */ |
| 1013 | /* OBSOLETE when making function calls into the inferior.", &setlist), */ |
| 1014 | /* OBSOLETE &showlist); */ |
| 1015 | /* OBSOLETE } */ |