projects / deliverable / binutils-gdb.git / blame
| Commit | Line | Data |
|---|---|---|
| 05d57f6f AC |
1 | // OBSOLETE /* Target-dependent code for the Mitsubishi m32r for GDB, the GNU debugger. |
| 2 | // OBSOLETE | |
| 3 | // OBSOLETE Copyright 1996, 1998, 1999, 2000, 2001, 2003 Free Software | |
| 4 | // OBSOLETE Foundation, Inc. | |
| 5 | // OBSOLETE | |
| 6 | // OBSOLETE This file is part of GDB. | |
| 7 | // OBSOLETE | |
| 8 | // OBSOLETE This program is free software; you can redistribute it and/or modify | |
| 9 | // OBSOLETE it under the terms of the GNU General Public License as published by | |
| 10 | // OBSOLETE the Free Software Foundation; either version 2 of the License, or | |
| 11 | // OBSOLETE (at your option) any later version. | |
| 12 | // OBSOLETE | |
| 13 | // OBSOLETE This program is distributed in the hope that it will be useful, | |
| 14 | // OBSOLETE but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 15 | // OBSOLETE MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 16 | // OBSOLETE GNU General Public License for more details. | |
| 17 | // OBSOLETE | |
| 18 | // OBSOLETE You should have received a copy of the GNU General Public License | |
| 19 | // OBSOLETE along with this program; if not, write to the Free Software | |
| 20 | // OBSOLETE Foundation, Inc., 59 Temple Place - Suite 330, | |
| 21 | // OBSOLETE Boston, MA 02111-1307, USA. */ | |
| 22 | // OBSOLETE | |
| 23 | // OBSOLETE #include "defs.h" | |
| 24 | // OBSOLETE #include "frame.h" | |
| 25 | // OBSOLETE #include "inferior.h" | |
| 26 | // OBSOLETE #include "target.h" | |
| 27 | // OBSOLETE #include "value.h" | |
| 28 | // OBSOLETE #include "bfd.h" | |
| 29 | // OBSOLETE #include "gdb_string.h" | |
| 30 | // OBSOLETE #include "gdbcore.h" | |
| 31 | // OBSOLETE #include "symfile.h" | |
| 32 | // OBSOLETE #include "regcache.h" | |
| 33 | // OBSOLETE | |
| 34 | // OBSOLETE /* Function: m32r_use_struct_convention | |
| 35 | // OBSOLETE Return nonzero if call_function should allocate stack space for a | |
| 36 | // OBSOLETE struct return? */ | |
| 37 | // OBSOLETE int | |
| 38 | // OBSOLETE m32r_use_struct_convention (int gcc_p, struct type *type) | |
| 39 | // OBSOLETE { | |
| 40 | // OBSOLETE return (TYPE_LENGTH (type) > 8); | |
| 41 | // OBSOLETE } | |
| 42 | // OBSOLETE | |
| 43 | // OBSOLETE /* Function: frame_find_saved_regs | |
| 44 | // OBSOLETE Return the frame_saved_regs structure for the frame. | |
| 45 | // OBSOLETE Doesn't really work for dummy frames, but it does pass back | |
| 46 | // OBSOLETE an empty frame_saved_regs, so I guess that's better than total failure */ | |
| 47 | // OBSOLETE | |
| 48 | // OBSOLETE void | |
| 49 | // OBSOLETE m32r_frame_find_saved_regs (struct frame_info *fi, | |
| 50 | // OBSOLETE struct frame_saved_regs *regaddr) | |
| 51 | // OBSOLETE { | |
| 52 | // OBSOLETE memcpy (regaddr, &fi->fsr, sizeof (struct frame_saved_regs)); | |
| 53 | // OBSOLETE } | |
| 54 | // OBSOLETE | |
| 55 | // OBSOLETE /* Turn this on if you want to see just how much instruction decoding | |
| 56 | // OBSOLETE if being done, its quite a lot | |
| 57 | // OBSOLETE */ | |
| 58 | // OBSOLETE #if 0 | |
| 59 | // OBSOLETE static void | |
| 60 | // OBSOLETE dump_insn (char *commnt, CORE_ADDR pc, int insn) | |
| 61 | // OBSOLETE { | |
| 62 | // OBSOLETE printf_filtered (" %s %08x %08x ", | |
| 63 | // OBSOLETE commnt, (unsigned int) pc, (unsigned int) insn); | |
| 64 | // OBSOLETE TARGET_PRINT_INSN (pc, &tm_print_insn_info); | |
| 65 | // OBSOLETE printf_filtered ("\n"); | |
| 66 | // OBSOLETE } | |
| 67 | // OBSOLETE #define insn_debug(args) { printf_filtered args; } | |
| 68 | // OBSOLETE #else | |
| 69 | // OBSOLETE #define dump_insn(a,b,c) {} | |
| 70 | // OBSOLETE #define insn_debug(args) {} | |
| 71 | // OBSOLETE #endif | |
| 72 | // OBSOLETE | |
| 73 | // OBSOLETE #define DEFAULT_SEARCH_LIMIT 44 | |
| 74 | // OBSOLETE | |
| 75 | // OBSOLETE /* Function: scan_prologue | |
| 76 | // OBSOLETE This function decodes the target function prologue to determine | |
| 77 | // OBSOLETE 1) the size of the stack frame, and 2) which registers are saved on it. | |
| 78 | // OBSOLETE It saves the offsets of saved regs in the frame_saved_regs argument, | |
| 79 | // OBSOLETE and returns the frame size. */ | |
| 80 | // OBSOLETE | |
| 81 | // OBSOLETE /* | |
| 82 | // OBSOLETE The sequence it currently generates is: | |
| 83 | // OBSOLETE | |
| 84 | // OBSOLETE if (varargs function) { ddi sp,#n } | |
| 85 | // OBSOLETE push registers | |
| 86 | // OBSOLETE if (additional stack <= 256) { addi sp,#-stack } | |
| 87 | // OBSOLETE else if (additional stack < 65k) { add3 sp,sp,#-stack | |
| 88 | // OBSOLETE | |
| 89 | // OBSOLETE } else if (additional stack) { | |
| 90 | // OBSOLETE seth sp,#(stack & 0xffff0000) | |
| 91 | // OBSOLETE or3 sp,sp,#(stack & 0x0000ffff) | |
| 92 | // OBSOLETE sub sp,r4 | |
| 93 | // OBSOLETE } | |
| 94 | // OBSOLETE if (frame pointer) { | |
| 95 | // OBSOLETE mv sp,fp | |
| 96 | // OBSOLETE } | |
| 97 | // OBSOLETE | |
| 98 | // OBSOLETE These instructions are scheduled like everything else, so you should stop at | |
| 99 | // OBSOLETE the first branch instruction. | |
| 100 | // OBSOLETE | |
| 101 | // OBSOLETE */ | |
| 102 | // OBSOLETE | |
| 103 | // OBSOLETE /* This is required by skip prologue and by m32r_init_extra_frame_info. | |
| 104 | // OBSOLETE The results of decoding a prologue should be cached because this | |
| 105 | // OBSOLETE thrashing is getting nuts. | |
| 106 | // OBSOLETE I am thinking of making a container class with two indexes, name and | |
| 107 | // OBSOLETE address. It may be better to extend the symbol table. | |
| 108 | // OBSOLETE */ | |
| 109 | // OBSOLETE | |
| 110 | // OBSOLETE static void | |
| 111 | // OBSOLETE decode_prologue (CORE_ADDR start_pc, CORE_ADDR scan_limit, CORE_ADDR *pl_endptr, /* var parameter */ | |
| 112 | // OBSOLETE unsigned long *framelength, struct frame_info *fi, | |
| 113 | // OBSOLETE struct frame_saved_regs *fsr) | |
| 114 | // OBSOLETE { | |
| 115 | // OBSOLETE unsigned long framesize; | |
| 116 | // OBSOLETE int insn; | |
| 117 | // OBSOLETE int op1; | |
| 118 | // OBSOLETE int maybe_one_more = 0; | |
| 119 | // OBSOLETE CORE_ADDR after_prologue = 0; | |
| 120 | // OBSOLETE CORE_ADDR after_stack_adjust = 0; | |
| 121 | // OBSOLETE CORE_ADDR current_pc; | |
| 122 | // OBSOLETE | |
| 123 | // OBSOLETE | |
| 124 | // OBSOLETE framesize = 0; | |
| 125 | // OBSOLETE after_prologue = 0; | |
| 126 | // OBSOLETE insn_debug (("rd prolog l(%d)\n", scan_limit - current_pc)); | |
| 127 | // OBSOLETE | |
| 128 | // OBSOLETE for (current_pc = start_pc; current_pc < scan_limit; current_pc += 2) | |
| 129 | // OBSOLETE { | |
| 130 | // OBSOLETE | |
| 131 | // OBSOLETE insn = read_memory_unsigned_integer (current_pc, 2); | |
| 132 | // OBSOLETE dump_insn ("insn-1", current_pc, insn); /* MTZ */ | |
| 133 | // OBSOLETE | |
| 134 | // OBSOLETE /* If this is a 32 bit instruction, we dont want to examine its | |
| 135 | // OBSOLETE immediate data as though it were an instruction */ | |
| 136 | // OBSOLETE if (current_pc & 0x02) | |
| 137 | // OBSOLETE { /* Clear the parallel execution bit from 16 bit instruction */ | |
| 138 | // OBSOLETE if (maybe_one_more) | |
| 139 | // OBSOLETE { /* The last instruction was a branch, usually terminates | |
| 140 | // OBSOLETE the series, but if this is a parallel instruction, | |
| 141 | // OBSOLETE it may be a stack framing instruction */ | |
| 142 | // OBSOLETE if (!(insn & 0x8000)) | |
| 143 | // OBSOLETE { | |
| 144 | // OBSOLETE insn_debug (("Really done")); | |
| 145 | // OBSOLETE break; /* nope, we are really done */ | |
| 146 | // OBSOLETE } | |
| 147 | // OBSOLETE } | |
| 148 | // OBSOLETE insn &= 0x7fff; /* decode this instruction further */ | |
| 149 | // OBSOLETE } | |
| 150 | // OBSOLETE else | |
| 151 | // OBSOLETE { | |
| 152 | // OBSOLETE if (maybe_one_more) | |
| 153 | // OBSOLETE break; /* This isnt the one more */ | |
| 154 | // OBSOLETE if (insn & 0x8000) | |
| 155 | // OBSOLETE { | |
| 156 | // OBSOLETE insn_debug (("32 bit insn\n")); | |
| 157 | // OBSOLETE if (current_pc == scan_limit) | |
| 158 | // OBSOLETE scan_limit += 2; /* extend the search */ | |
| 159 | // OBSOLETE current_pc += 2; /* skip the immediate data */ | |
| 160 | // OBSOLETE if (insn == 0x8faf) /* add3 sp, sp, xxxx */ | |
| 161 | // OBSOLETE /* add 16 bit sign-extended offset */ | |
| 162 | // OBSOLETE { | |
| 163 | // OBSOLETE insn_debug (("stack increment\n")); | |
| 164 | // OBSOLETE framesize += -((short) read_memory_unsigned_integer (current_pc, 2)); | |
| 165 | // OBSOLETE } | |
| 166 | // OBSOLETE else | |
| 167 | // OBSOLETE { | |
| 168 | // OBSOLETE if (((insn >> 8) == 0xe4) && /* ld24 r4, xxxxxx; sub sp, r4 */ | |
| 169 | // OBSOLETE read_memory_unsigned_integer (current_pc + 2, 2) == 0x0f24) | |
| 170 | // OBSOLETE { /* subtract 24 bit sign-extended negative-offset */ | |
| 171 | // OBSOLETE dump_insn ("insn-2", current_pc + 2, insn); | |
| 172 | // OBSOLETE insn = read_memory_unsigned_integer (current_pc - 2, 4); | |
| 173 | // OBSOLETE dump_insn ("insn-3(l4)", current_pc - 2, insn); | |
| 174 | // OBSOLETE if (insn & 0x00800000) /* sign extend */ | |
| 175 | // OBSOLETE insn |= 0xff000000; /* negative */ | |
| 176 | // OBSOLETE else | |
| 177 | // OBSOLETE insn &= 0x00ffffff; /* positive */ | |
| 178 | // OBSOLETE framesize += insn; | |
| 179 | // OBSOLETE } | |
| 180 | // OBSOLETE } | |
| 181 | // OBSOLETE after_prologue = current_pc; | |
| 182 | // OBSOLETE continue; | |
| 183 | // OBSOLETE } | |
| 184 | // OBSOLETE } | |
| 185 | // OBSOLETE op1 = insn & 0xf000; /* isolate just the first nibble */ | |
| 186 | // OBSOLETE | |
| 187 | // OBSOLETE if ((insn & 0xf0ff) == 0x207f) | |
| 188 | // OBSOLETE { /* st reg, @-sp */ | |
| 189 | // OBSOLETE int regno; | |
| 190 | // OBSOLETE insn_debug (("push\n")); | |
| 191 | // OBSOLETE #if 0 /* No, PUSH FP is not an indication that we will use a frame pointer. */ | |
| 192 | // OBSOLETE if (((insn & 0xffff) == 0x2d7f) && fi) | |
| 193 | // OBSOLETE fi->using_frame_pointer = 1; | |
| 194 | // OBSOLETE #endif | |
| 195 | // OBSOLETE framesize += 4; | |
| 196 | // OBSOLETE #if 0 | |
| 197 | // OBSOLETE /* Why should we increase the scan limit, just because we did a push? | |
| 198 | // OBSOLETE And if there is a reason, surely we would only want to do it if we | |
| 199 | // OBSOLETE had already reached the scan limit... */ | |
| 200 | // OBSOLETE if (current_pc == scan_limit) | |
| 201 | // OBSOLETE scan_limit += 2; | |
| 202 | // OBSOLETE #endif | |
| 203 | // OBSOLETE regno = ((insn >> 8) & 0xf); | |
| 204 | // OBSOLETE if (fsr) /* save_regs offset */ | |
| 205 | // OBSOLETE fsr->regs[regno] = framesize; | |
| 206 | // OBSOLETE after_prologue = 0; | |
| 207 | // OBSOLETE continue; | |
| 208 | // OBSOLETE } | |
| 209 | // OBSOLETE if ((insn >> 8) == 0x4f) /* addi sp, xx */ | |
| 210 | // OBSOLETE /* add 8 bit sign-extended offset */ | |
| 211 | // OBSOLETE { | |
| 212 | // OBSOLETE int stack_adjust = (char) (insn & 0xff); | |
| 213 | // OBSOLETE | |
| 214 | // OBSOLETE /* there are probably two of these stack adjustments: | |
| 215 | // OBSOLETE 1) A negative one in the prologue, and | |
| 216 | // OBSOLETE 2) A positive one in the epilogue. | |
| 217 | // OBSOLETE We are only interested in the first one. */ | |
| 218 | // OBSOLETE | |
| 219 | // OBSOLETE if (stack_adjust < 0) | |
| 220 | // OBSOLETE { | |
| 221 | // OBSOLETE framesize -= stack_adjust; | |
| 222 | // OBSOLETE after_prologue = 0; | |
| 223 | // OBSOLETE /* A frameless function may have no "mv fp, sp". | |
| 224 | // OBSOLETE In that case, this is the end of the prologue. */ | |
| 225 | // OBSOLETE after_stack_adjust = current_pc + 2; | |
| 226 | // OBSOLETE } | |
| 227 | // OBSOLETE continue; | |
| 228 | // OBSOLETE } | |
| 229 | // OBSOLETE if (insn == 0x1d8f) | |
| 230 | // OBSOLETE { /* mv fp, sp */ | |
| 231 | // OBSOLETE if (fi) | |
| 232 | // OBSOLETE fi->using_frame_pointer = 1; /* fp is now valid */ | |
| 233 | // OBSOLETE insn_debug (("done fp found\n")); | |
| 234 | // OBSOLETE after_prologue = current_pc + 2; | |
| 235 | // OBSOLETE break; /* end of stack adjustments */ | |
| 236 | // OBSOLETE } | |
| 237 | // OBSOLETE if (insn == 0x7000) /* Nop looks like a branch, continue explicitly */ | |
| 238 | // OBSOLETE { | |
| 239 | // OBSOLETE insn_debug (("nop\n")); | |
| 240 | // OBSOLETE after_prologue = current_pc + 2; | |
| 241 | // OBSOLETE continue; /* nop occurs between pushes */ | |
| 242 | // OBSOLETE } | |
| 243 | // OBSOLETE /* End of prolog if any of these are branch instructions */ | |
| 244 | // OBSOLETE if ((op1 == 0x7000) | |
| 245 | // OBSOLETE || (op1 == 0xb000) | |
| 246 | // OBSOLETE || (op1 == 0xf000)) | |
| 247 | // OBSOLETE { | |
| 248 | // OBSOLETE after_prologue = current_pc; | |
| 249 | // OBSOLETE insn_debug (("Done: branch\n")); | |
| 250 | // OBSOLETE maybe_one_more = 1; | |
| 251 | // OBSOLETE continue; | |
| 252 | // OBSOLETE } | |
| 253 | // OBSOLETE /* Some of the branch instructions are mixed with other types */ | |
| 254 | // OBSOLETE if (op1 == 0x1000) | |
| 255 | // OBSOLETE { | |
| 256 | // OBSOLETE int subop = insn & 0x0ff0; | |
| 257 | // OBSOLETE if ((subop == 0x0ec0) || (subop == 0x0fc0)) | |
| 258 | // OBSOLETE { | |
| 259 | // OBSOLETE insn_debug (("done: jmp\n")); | |
| 260 | // OBSOLETE after_prologue = current_pc; | |
| 261 | // OBSOLETE maybe_one_more = 1; | |
| 262 | // OBSOLETE continue; /* jmp , jl */ | |
| 263 | // OBSOLETE } | |
| 264 | // OBSOLETE } | |
| 265 | // OBSOLETE } | |
| 266 | // OBSOLETE | |
| 267 | // OBSOLETE if (current_pc >= scan_limit) | |
| 268 | // OBSOLETE { | |
| 269 | // OBSOLETE if (pl_endptr) | |
| 270 | // OBSOLETE { | |
| 271 | // OBSOLETE #if 1 | |
| 272 | // OBSOLETE if (after_stack_adjust != 0) | |
| 273 | // OBSOLETE /* We did not find a "mv fp,sp", but we DID find | |
| 274 | // OBSOLETE a stack_adjust. Is it safe to use that as the | |
| 275 | // OBSOLETE end of the prologue? I just don't know. */ | |
| 276 | // OBSOLETE { | |
| 277 | // OBSOLETE *pl_endptr = after_stack_adjust; | |
| 278 | // OBSOLETE if (framelength) | |
| 279 | // OBSOLETE *framelength = framesize; | |
| 280 | // OBSOLETE } | |
| 281 | // OBSOLETE else | |
| 282 | // OBSOLETE #endif | |
| 283 | // OBSOLETE /* We reached the end of the loop without finding the end | |
| 284 | // OBSOLETE of the prologue. No way to win -- we should report failure. | |
| 285 | // OBSOLETE The way we do that is to return the original start_pc. | |
| 286 | // OBSOLETE GDB will set a breakpoint at the start of the function (etc.) */ | |
| 287 | // OBSOLETE *pl_endptr = start_pc; | |
| 288 | // OBSOLETE } | |
| 289 | // OBSOLETE return; | |
| 290 | // OBSOLETE } | |
| 291 | // OBSOLETE if (after_prologue == 0) | |
| 292 | // OBSOLETE after_prologue = current_pc; | |
| 293 | // OBSOLETE | |
| 294 | // OBSOLETE insn_debug ((" framesize %d, firstline %08x\n", framesize, after_prologue)); | |
| 295 | // OBSOLETE if (framelength) | |
| 296 | // OBSOLETE *framelength = framesize; | |
| 297 | // OBSOLETE if (pl_endptr) | |
| 298 | // OBSOLETE *pl_endptr = after_prologue; | |
| 299 | // OBSOLETE } /* decode_prologue */ | |
| 300 | // OBSOLETE | |
| 301 | // OBSOLETE /* Function: skip_prologue | |
| 302 | // OBSOLETE Find end of function prologue */ | |
| 303 | // OBSOLETE | |
| 304 | // OBSOLETE CORE_ADDR | |
| 305 | // OBSOLETE m32r_skip_prologue (CORE_ADDR pc) | |
| 306 | // OBSOLETE { | |
| 307 | // OBSOLETE CORE_ADDR func_addr, func_end; | |
| 308 | // OBSOLETE struct symtab_and_line sal; | |
| 309 | // OBSOLETE | |
| 310 | // OBSOLETE /* See what the symbol table says */ | |
| 311 | // OBSOLETE | |
| 312 | // OBSOLETE if (find_pc_partial_function (pc, NULL, &func_addr, &func_end)) | |
| 313 | // OBSOLETE { | |
| 314 | // OBSOLETE sal = find_pc_line (func_addr, 0); | |
| 315 | // OBSOLETE | |
| 316 | // OBSOLETE if (sal.line != 0 && sal.end <= func_end) | |
| 317 | // OBSOLETE { | |
| 318 | // OBSOLETE | |
| 319 | // OBSOLETE insn_debug (("BP after prologue %08x\n", sal.end)); | |
| 320 | // OBSOLETE func_end = sal.end; | |
| 321 | // OBSOLETE } | |
| 322 | // OBSOLETE else | |
| 323 | // OBSOLETE /* Either there's no line info, or the line after the prologue is after | |
| 324 | // OBSOLETE the end of the function. In this case, there probably isn't a | |
| 325 | // OBSOLETE prologue. */ | |
| 326 | // OBSOLETE { | |
| 327 | // OBSOLETE insn_debug (("No line info, line(%x) sal_end(%x) funcend(%x)\n", | |
| 328 | // OBSOLETE sal.line, sal.end, func_end)); | |
| 329 | // OBSOLETE func_end = min (func_end, func_addr + DEFAULT_SEARCH_LIMIT); | |
| 330 | // OBSOLETE } | |
| 331 | // OBSOLETE } | |
| 332 | // OBSOLETE else | |
| 333 | // OBSOLETE func_end = pc + DEFAULT_SEARCH_LIMIT; | |
| 334 | // OBSOLETE decode_prologue (pc, func_end, &sal.end, 0, 0, 0); | |
| 335 | // OBSOLETE return sal.end; | |
| 336 | // OBSOLETE } | |
| 337 | // OBSOLETE | |
| 338 | // OBSOLETE static unsigned long | |
| 339 | // OBSOLETE m32r_scan_prologue (struct frame_info *fi, struct frame_saved_regs *fsr) | |
| 340 | // OBSOLETE { | |
| 341 | // OBSOLETE struct symtab_and_line sal; | |
| 342 | // OBSOLETE CORE_ADDR prologue_start, prologue_end, current_pc; | |
| 343 | // OBSOLETE unsigned long framesize = 0; | |
| 344 | // OBSOLETE | |
| 345 | // OBSOLETE /* this code essentially duplicates skip_prologue, | |
| 346 | // OBSOLETE but we need the start address below. */ | |
| 347 | // OBSOLETE | |
| 348 | // OBSOLETE if (find_pc_partial_function (fi->pc, NULL, &prologue_start, &prologue_end)) | |
| 349 | // OBSOLETE { | |
| 350 | // OBSOLETE sal = find_pc_line (prologue_start, 0); | |
| 351 | // OBSOLETE | |
| 352 | // OBSOLETE if (sal.line == 0) /* no line info, use current PC */ | |
| 353 | // OBSOLETE if (prologue_start == entry_point_address ()) | |
| 354 | // OBSOLETE return 0; | |
| 355 | // OBSOLETE } | |
| 356 | // OBSOLETE else | |
| 357 | // OBSOLETE { | |
| 358 | // OBSOLETE prologue_start = fi->pc; | |
| 359 | // OBSOLETE prologue_end = prologue_start + 48; /* We're in the boondocks: | |
| 360 | // OBSOLETE allow for 16 pushes, an add, | |
| 361 | // OBSOLETE and "mv fp,sp" */ | |
| 362 | // OBSOLETE } | |
| 363 | // OBSOLETE #if 0 | |
| 364 | // OBSOLETE prologue_end = min (prologue_end, fi->pc); | |
| 365 | // OBSOLETE #endif | |
| 366 | // OBSOLETE insn_debug (("fipc(%08x) start(%08x) end(%08x)\n", | |
| 367 | // OBSOLETE fi->pc, prologue_start, prologue_end)); | |
| 368 | // OBSOLETE prologue_end = min (prologue_end, prologue_start + DEFAULT_SEARCH_LIMIT); | |
| 369 | // OBSOLETE decode_prologue (prologue_start, prologue_end, &prologue_end, &framesize, | |
| 370 | // OBSOLETE fi, fsr); | |
| 371 | // OBSOLETE return framesize; | |
| 372 | // OBSOLETE } | |
| 373 | // OBSOLETE | |
| 374 | // OBSOLETE /* Function: init_extra_frame_info | |
| 375 | // OBSOLETE This function actually figures out the frame address for a given pc and | |
| 376 | // OBSOLETE sp. This is tricky on the m32r because we sometimes don't use an explicit | |
| 377 | // OBSOLETE frame pointer, and the previous stack pointer isn't necessarily recorded | |
| 378 | // OBSOLETE on the stack. The only reliable way to get this info is to | |
| 379 | // OBSOLETE examine the prologue. */ | |
| 380 | // OBSOLETE | |
| 381 | // OBSOLETE void | |
| 382 | // OBSOLETE m32r_init_extra_frame_info (struct frame_info *fi) | |
| 383 | // OBSOLETE { | |
| 384 | // OBSOLETE int reg; | |
| 385 | // OBSOLETE | |
| 386 | // OBSOLETE if (fi->next) | |
| 387 | // OBSOLETE fi->pc = FRAME_SAVED_PC (fi->next); | |
| 388 | // OBSOLETE | |
| 389 | // OBSOLETE memset (fi->fsr.regs, '\000', sizeof fi->fsr.regs); | |
| 390 | // OBSOLETE | |
| 391 | // OBSOLETE if (DEPRECATED_PC_IN_CALL_DUMMY (fi->pc, fi->frame, fi->frame)) | |
| 392 | // OBSOLETE { | |
| 393 | // OBSOLETE /* We need to setup fi->frame here because run_stack_dummy gets it wrong | |
| 394 | // OBSOLETE by assuming it's always FP. */ | |
| 395 | // OBSOLETE fi->frame = deprecated_read_register_dummy (fi->pc, fi->frame, | |
| 396 | // OBSOLETE SP_REGNUM); | |
| 397 | // OBSOLETE fi->framesize = 0; | |
| 398 | // OBSOLETE return; | |
| 399 | // OBSOLETE } | |
| 400 | // OBSOLETE else | |
| 401 | // OBSOLETE { | |
| 402 | // OBSOLETE fi->using_frame_pointer = 0; | |
| 403 | // OBSOLETE fi->framesize = m32r_scan_prologue (fi, &fi->fsr); | |
| 404 | // OBSOLETE | |
| 405 | // OBSOLETE if (!fi->next) | |
| 406 | // OBSOLETE if (fi->using_frame_pointer) | |
| 407 | // OBSOLETE { | |
| 408 | // OBSOLETE fi->frame = read_register (FP_REGNUM); | |
| 409 | // OBSOLETE } | |
| 410 | // OBSOLETE else | |
| 411 | // OBSOLETE fi->frame = read_register (SP_REGNUM); | |
| 412 | // OBSOLETE else | |
| 413 | // OBSOLETE /* fi->next means this is not the innermost frame */ if (fi->using_frame_pointer) | |
| 414 | // OBSOLETE /* we have an FP */ | |
| 415 | // OBSOLETE if (fi->next->fsr.regs[FP_REGNUM] != 0) /* caller saved our FP */ | |
| 416 | // OBSOLETE fi->frame = read_memory_integer (fi->next->fsr.regs[FP_REGNUM], 4); | |
| 417 | // OBSOLETE for (reg = 0; reg < NUM_REGS; reg++) | |
| 418 | // OBSOLETE if (fi->fsr.regs[reg] != 0) | |
| 419 | // OBSOLETE fi->fsr.regs[reg] = fi->frame + fi->framesize - fi->fsr.regs[reg]; | |
| 420 | // OBSOLETE } | |
| 421 | // OBSOLETE } | |
| 422 | // OBSOLETE | |
| 423 | // OBSOLETE /* Function: m32r_virtual_frame_pointer | |
| 424 | // OBSOLETE Return the register that the function uses for a frame pointer, | |
| 425 | // OBSOLETE plus any necessary offset to be applied to the register before | |
| 426 | // OBSOLETE any frame pointer offsets. */ | |
| 427 | // OBSOLETE | |
| 428 | // OBSOLETE void | |
| 429 | // OBSOLETE m32r_virtual_frame_pointer (CORE_ADDR pc, long *reg, long *offset) | |
| 430 | // OBSOLETE { | |
| 431 | // OBSOLETE struct frame_info *fi = deprecated_frame_xmalloc (); | |
| 432 | // OBSOLETE struct cleanup *old_chain = make_cleanup (xfree, fi); | |
| 433 | // OBSOLETE | |
| 434 | // OBSOLETE /* Set up a dummy frame_info. */ | |
| 435 | // OBSOLETE fi->next = NULL; | |
| 436 | // OBSOLETE fi->prev = NULL; | |
| 437 | // OBSOLETE fi->frame = 0; | |
| 438 | // OBSOLETE fi->pc = pc; | |
| 439 | // OBSOLETE | |
| 440 | // OBSOLETE /* Analyze the prolog and fill in the extra info. */ | |
| 441 | // OBSOLETE m32r_init_extra_frame_info (fi); | |
| 442 | // OBSOLETE | |
| 443 | // OBSOLETE /* Results will tell us which type of frame it uses. */ | |
| 444 | // OBSOLETE if (fi->using_frame_pointer) | |
| 445 | // OBSOLETE { | |
| 446 | // OBSOLETE *reg = FP_REGNUM; | |
| 447 | // OBSOLETE *offset = 0; | |
| 448 | // OBSOLETE } | |
| 449 | // OBSOLETE else | |
| 450 | // OBSOLETE { | |
| 451 | // OBSOLETE *reg = SP_REGNUM; | |
| 452 | // OBSOLETE *offset = 0; | |
| 453 | // OBSOLETE } | |
| 454 | // OBSOLETE do_cleanups (old_chain); | |
| 455 | // OBSOLETE } | |
| 456 | // OBSOLETE | |
| 457 | // OBSOLETE /* Function: find_callers_reg | |
| 458 | // OBSOLETE Find REGNUM on the stack. Otherwise, it's in an active register. One thing | |
| 459 | // OBSOLETE we might want to do here is to check REGNUM against the clobber mask, and | |
| 460 | // OBSOLETE somehow flag it as invalid if it isn't saved on the stack somewhere. This | |
| 461 | // OBSOLETE would provide a graceful failure mode when trying to get the value of | |
| 462 | // OBSOLETE caller-saves registers for an inner frame. */ | |
| 463 | // OBSOLETE | |
| 464 | // OBSOLETE CORE_ADDR | |
| 465 | // OBSOLETE m32r_find_callers_reg (struct frame_info *fi, int regnum) | |
| 466 | // OBSOLETE { | |
| 467 | // OBSOLETE for (; fi; fi = fi->next) | |
| 468 | // OBSOLETE if (DEPRECATED_PC_IN_CALL_DUMMY (fi->pc, fi->frame, fi->frame)) | |
| 469 | // OBSOLETE return deprecated_read_register_dummy (fi->pc, fi->frame, regnum); | |
| 470 | // OBSOLETE else if (fi->fsr.regs[regnum] != 0) | |
| 471 | // OBSOLETE return read_memory_integer (fi->fsr.regs[regnum], | |
| 472 | // OBSOLETE REGISTER_RAW_SIZE (regnum)); | |
| 473 | // OBSOLETE return read_register (regnum); | |
| 474 | // OBSOLETE } | |
| 475 | // OBSOLETE | |
| 476 | // OBSOLETE /* Function: frame_chain Given a GDB frame, determine the address of | |
| 477 | // OBSOLETE the calling function's frame. This will be used to create a new | |
| 478 | // OBSOLETE GDB frame struct, and then INIT_EXTRA_FRAME_INFO and | |
| 479 | // OBSOLETE DEPRECATED_INIT_FRAME_PC will be called for the new frame. For | |
| 480 | // OBSOLETE m32r, we save the frame size when we initialize the frame_info. */ | |
| 481 | // OBSOLETE | |
| 482 | // OBSOLETE CORE_ADDR | |
| 483 | // OBSOLETE m32r_frame_chain (struct frame_info *fi) | |
| 484 | // OBSOLETE { | |
| 485 | // OBSOLETE CORE_ADDR fn_start, callers_pc, fp; | |
| 486 | // OBSOLETE | |
| 487 | // OBSOLETE /* is this a dummy frame? */ | |
| 488 | // OBSOLETE if (DEPRECATED_PC_IN_CALL_DUMMY (fi->pc, fi->frame, fi->frame)) | |
| 489 | // OBSOLETE return fi->frame; /* dummy frame same as caller's frame */ | |
| 490 | // OBSOLETE | |
| 491 | // OBSOLETE /* is caller-of-this a dummy frame? */ | |
| 492 | // OBSOLETE callers_pc = FRAME_SAVED_PC (fi); /* find out who called us: */ | |
| 493 | // OBSOLETE fp = m32r_find_callers_reg (fi, FP_REGNUM); | |
| 494 | // OBSOLETE if (DEPRECATED_PC_IN_CALL_DUMMY (callers_pc, fp, fp)) | |
| 495 | // OBSOLETE return fp; /* dummy frame's frame may bear no relation to ours */ | |
| 496 | // OBSOLETE | |
| 497 | // OBSOLETE if (find_pc_partial_function (fi->pc, 0, &fn_start, 0)) | |
| 498 | // OBSOLETE if (fn_start == entry_point_address ()) | |
| 499 | // OBSOLETE return 0; /* in _start fn, don't chain further */ | |
| 500 | // OBSOLETE if (fi->framesize == 0) | |
| 501 | // OBSOLETE { | |
| 502 | // OBSOLETE printf_filtered ("cannot determine frame size @ %s , pc(%s)\n", | |
| 503 | // OBSOLETE paddr (fi->frame), | |
| 504 | // OBSOLETE paddr (fi->pc)); | |
| 505 | // OBSOLETE return 0; | |
| 506 | // OBSOLETE } | |
| 507 | // OBSOLETE insn_debug (("m32rx frame %08x\n", fi->frame + fi->framesize)); | |
| 508 | // OBSOLETE return fi->frame + fi->framesize; | |
| 509 | // OBSOLETE } | |
| 510 | // OBSOLETE | |
| 511 | // OBSOLETE /* Function: push_return_address (pc) | |
| 512 | // OBSOLETE Set up the return address for the inferior function call. | |
| 513 | // OBSOLETE Necessary for targets that don't actually execute a JSR/BSR instruction | |
| 514 | // OBSOLETE (ie. when using an empty CALL_DUMMY) */ | |
| 515 | // OBSOLETE | |
| 516 | // OBSOLETE CORE_ADDR | |
| 517 | // OBSOLETE m32r_push_return_address (CORE_ADDR pc, CORE_ADDR sp) | |
| 518 | // OBSOLETE { | |
| 519 | // OBSOLETE write_register (RP_REGNUM, CALL_DUMMY_ADDRESS ()); | |
| 520 | // OBSOLETE return sp; | |
| 521 | // OBSOLETE } | |
| 522 | // OBSOLETE | |
| 523 | // OBSOLETE | |
| 524 | // OBSOLETE /* Function: pop_frame | |
| 525 | // OBSOLETE Discard from the stack the innermost frame, | |
| 526 | // OBSOLETE restoring all saved registers. */ | |
| 527 | // OBSOLETE | |
| 528 | // OBSOLETE struct frame_info * | |
| 529 | // OBSOLETE m32r_pop_frame (struct frame_info *frame) | |
| 530 | // OBSOLETE { | |
| 531 | // OBSOLETE int regnum; | |
| 532 | // OBSOLETE | |
| 533 | // OBSOLETE if (DEPRECATED_PC_IN_CALL_DUMMY (frame->pc, frame->frame, frame->frame)) | |
| 534 | // OBSOLETE generic_pop_dummy_frame (); | |
| 535 | // OBSOLETE else | |
| 536 | // OBSOLETE { | |
| 537 | // OBSOLETE for (regnum = 0; regnum < NUM_REGS; regnum++) | |
| 538 | // OBSOLETE if (frame->fsr.regs[regnum] != 0) | |
| 539 | // OBSOLETE write_register (regnum, | |
| 540 | // OBSOLETE read_memory_integer (frame->fsr.regs[regnum], 4)); | |
| 541 | // OBSOLETE | |
| 542 | // OBSOLETE write_register (PC_REGNUM, FRAME_SAVED_PC (frame)); | |
| 543 | // OBSOLETE write_register (SP_REGNUM, read_register (FP_REGNUM)); | |
| 544 | // OBSOLETE if (read_register (PSW_REGNUM) & 0x80) | |
| 545 | // OBSOLETE write_register (SPU_REGNUM, read_register (SP_REGNUM)); | |
| 546 | // OBSOLETE else | |
| 547 | // OBSOLETE write_register (SPI_REGNUM, read_register (SP_REGNUM)); | |
| 548 | // OBSOLETE } | |
| 549 | // OBSOLETE flush_cached_frames (); | |
| 550 | // OBSOLETE return NULL; | |
| 551 | // OBSOLETE } | |
| 552 | // OBSOLETE | |
| 553 | // OBSOLETE /* Function: frame_saved_pc | |
| 554 | // OBSOLETE Find the caller of this frame. We do this by seeing if RP_REGNUM is saved | |
| 555 | // OBSOLETE in the stack anywhere, otherwise we get it from the registers. */ | |
| 556 | // OBSOLETE | |
| 557 | // OBSOLETE CORE_ADDR | |
| 558 | // OBSOLETE m32r_frame_saved_pc (struct frame_info *fi) | |
| 559 | // OBSOLETE { | |
| 560 | // OBSOLETE if (DEPRECATED_PC_IN_CALL_DUMMY (fi->pc, fi->frame, fi->frame)) | |
| 561 | // OBSOLETE return deprecated_read_register_dummy (fi->pc, fi->frame, PC_REGNUM); | |
| 562 | // OBSOLETE else | |
| 563 | // OBSOLETE return m32r_find_callers_reg (fi, RP_REGNUM); | |
| 564 | // OBSOLETE } | |
| 565 | // OBSOLETE | |
| 566 | // OBSOLETE /* Function: push_arguments | |
| 567 | // OBSOLETE Setup the function arguments for calling a function in the inferior. | |
| 568 | // OBSOLETE | |
| 569 | // OBSOLETE On the Mitsubishi M32R architecture, there are four registers (R0 to R3) | |
| 570 | // OBSOLETE which are dedicated for passing function arguments. Up to the first | |
| 571 | // OBSOLETE four arguments (depending on size) may go into these registers. | |
| 572 | // OBSOLETE The rest go on the stack. | |
| 573 | // OBSOLETE | |
| 574 | // OBSOLETE Arguments that are smaller than 4 bytes will still take up a whole | |
| 575 | // OBSOLETE register or a whole 32-bit word on the stack, and will be | |
| 576 | // OBSOLETE right-justified in the register or the stack word. This includes | |
| 577 | // OBSOLETE chars, shorts, and small aggregate types. | |
| 578 | // OBSOLETE | |
| 579 | // OBSOLETE Arguments of 8 bytes size are split between two registers, if | |
| 580 | // OBSOLETE available. If only one register is available, the argument will | |
| 581 | // OBSOLETE be split between the register and the stack. Otherwise it is | |
| 582 | // OBSOLETE passed entirely on the stack. Aggregate types with sizes between | |
| 583 | // OBSOLETE 4 and 8 bytes are passed entirely on the stack, and are left-justified | |
| 584 | // OBSOLETE within the double-word (as opposed to aggregates smaller than 4 bytes | |
| 585 | // OBSOLETE which are right-justified). | |
| 586 | // OBSOLETE | |
| 587 | // OBSOLETE Aggregates of greater than 8 bytes are first copied onto the stack, | |
| 588 | // OBSOLETE and then a pointer to the copy is passed in the place of the normal | |
| 589 | // OBSOLETE argument (either in a register if available, or on the stack). | |
| 590 | // OBSOLETE | |
| 591 | // OBSOLETE Functions that must return an aggregate type can return it in the | |
| 592 | // OBSOLETE normal return value registers (R0 and R1) if its size is 8 bytes or | |
| 593 | // OBSOLETE less. For larger return values, the caller must allocate space for | |
| 594 | // OBSOLETE the callee to copy the return value to. A pointer to this space is | |
| 595 | // OBSOLETE passed as an implicit first argument, always in R0. */ | |
| 596 | // OBSOLETE | |
| 597 | // OBSOLETE CORE_ADDR | |
| 598 | // OBSOLETE m32r_push_arguments (int nargs, struct value **args, CORE_ADDR sp, | |
| 599 | // OBSOLETE unsigned char struct_return, CORE_ADDR struct_addr) | |
| 600 | // OBSOLETE { | |
| 601 | // OBSOLETE int stack_offset, stack_alloc; | |
| 602 | // OBSOLETE int argreg; | |
| 603 | // OBSOLETE int argnum; | |
| 604 | // OBSOLETE struct type *type; | |
| 605 | // OBSOLETE CORE_ADDR regval; | |
| 606 | // OBSOLETE char *val; | |
| 607 | // OBSOLETE char valbuf[4]; | |
| 608 | // OBSOLETE int len; | |
| 609 | // OBSOLETE int odd_sized_struct; | |
| 610 | // OBSOLETE | |
| 611 | // OBSOLETE /* first force sp to a 4-byte alignment */ | |
| 612 | // OBSOLETE sp = sp & ~3; | |
| 613 | // OBSOLETE | |
| 614 | // OBSOLETE argreg = ARG0_REGNUM; | |
| 615 | // OBSOLETE /* The "struct return pointer" pseudo-argument goes in R0 */ | |
| 616 | // OBSOLETE if (struct_return) | |
| 617 | // OBSOLETE write_register (argreg++, struct_addr); | |
| 618 | // OBSOLETE | |
| 619 | // OBSOLETE /* Now make sure there's space on the stack */ | |
| 620 | // OBSOLETE for (argnum = 0, stack_alloc = 0; | |
| 621 | // OBSOLETE argnum < nargs; argnum++) | |
| 622 | // OBSOLETE stack_alloc += ((TYPE_LENGTH (VALUE_TYPE (args[argnum])) + 3) & ~3); | |
| 623 | // OBSOLETE sp -= stack_alloc; /* make room on stack for args */ | |
| 624 | // OBSOLETE | |
| 625 | // OBSOLETE | |
| 626 | // OBSOLETE /* Now load as many as possible of the first arguments into | |
| 627 | // OBSOLETE registers, and push the rest onto the stack. There are 16 bytes | |
| 628 | // OBSOLETE in four registers available. Loop thru args from first to last. */ | |
| 629 | // OBSOLETE | |
| 630 | // OBSOLETE argreg = ARG0_REGNUM; | |
| 631 | // OBSOLETE for (argnum = 0, stack_offset = 0; argnum < nargs; argnum++) | |
| 632 | // OBSOLETE { | |
| 633 | // OBSOLETE type = VALUE_TYPE (args[argnum]); | |
| 634 | // OBSOLETE len = TYPE_LENGTH (type); | |
| 635 | // OBSOLETE memset (valbuf, 0, sizeof (valbuf)); | |
| 636 | // OBSOLETE if (len < 4) | |
| 637 | // OBSOLETE { /* value gets right-justified in the register or stack word */ | |
| 638 | // OBSOLETE memcpy (valbuf + (4 - len), | |
| 639 | // OBSOLETE (char *) VALUE_CONTENTS (args[argnum]), len); | |
| 640 | // OBSOLETE val = valbuf; | |
| 641 | // OBSOLETE } | |
| 642 | // OBSOLETE else | |
| 643 | // OBSOLETE val = (char *) VALUE_CONTENTS (args[argnum]); | |
| 644 | // OBSOLETE | |
| 645 | // OBSOLETE if (len > 4 && (len & 3) != 0) | |
| 646 | // OBSOLETE odd_sized_struct = 1; /* such structs go entirely on stack */ | |
| 647 | // OBSOLETE else | |
| 648 | // OBSOLETE odd_sized_struct = 0; | |
| 649 | // OBSOLETE while (len > 0) | |
| 650 | // OBSOLETE { | |
| 651 | // OBSOLETE if (argreg > ARGLAST_REGNUM || odd_sized_struct) | |
| 652 | // OBSOLETE { /* must go on the stack */ | |
| 653 | // OBSOLETE write_memory (sp + stack_offset, val, 4); | |
| 654 | // OBSOLETE stack_offset += 4; | |
| 655 | // OBSOLETE } | |
| 656 | // OBSOLETE /* NOTE WELL!!!!! This is not an "else if" clause!!! | |
| 657 | // OBSOLETE That's because some *&^%$ things get passed on the stack | |
| 658 | // OBSOLETE AND in the registers! */ | |
| 659 | // OBSOLETE if (argreg <= ARGLAST_REGNUM) | |
| 660 | // OBSOLETE { /* there's room in a register */ | |
| 661 | // OBSOLETE regval = extract_address (val, REGISTER_RAW_SIZE (argreg)); | |
| 662 | // OBSOLETE write_register (argreg++, regval); | |
| 663 | // OBSOLETE } | |
| 664 | // OBSOLETE /* Store the value 4 bytes at a time. This means that things | |
| 665 | // OBSOLETE larger than 4 bytes may go partly in registers and partly | |
| 666 | // OBSOLETE on the stack. */ | |
| 667 | // OBSOLETE len -= REGISTER_RAW_SIZE (argreg); | |
| 668 | // OBSOLETE val += REGISTER_RAW_SIZE (argreg); | |
| 669 | // OBSOLETE } | |
| 670 | // OBSOLETE } | |
| 671 | // OBSOLETE return sp; | |
| 672 | // OBSOLETE } | |
| 673 | // OBSOLETE | |
| 674 | // OBSOLETE /* Function: fix_call_dummy | |
| 675 | // OBSOLETE If there is real CALL_DUMMY code (eg. on the stack), this function | |
| 676 | // OBSOLETE has the responsability to insert the address of the actual code that | |
| 677 | // OBSOLETE is the target of the target function call. */ | |
| 678 | // OBSOLETE | |
| 679 | // OBSOLETE void | |
| 680 | // OBSOLETE m32r_fix_call_dummy (char *dummy, CORE_ADDR pc, CORE_ADDR fun, int nargs, | |
| 681 | // OBSOLETE struct value **args, struct type *type, int gcc_p) | |
| 682 | // OBSOLETE { | |
| 683 | // OBSOLETE /* ld24 r8, <(imm24) fun> */ | |
| 684 | // OBSOLETE *(unsigned long *) (dummy) = (fun & 0x00ffffff) | 0xe8000000; | |
| 685 | // OBSOLETE } | |
| 686 | // OBSOLETE | |
| 687 | // OBSOLETE | |
| 688 | // OBSOLETE /* Function: m32r_write_sp | |
| 689 | // OBSOLETE Because SP is really a read-only register that mirrors either SPU or SPI, | |
| 690 | // OBSOLETE we must actually write one of those two as well, depending on PSW. */ | |
| 691 | // OBSOLETE | |
| 692 | // OBSOLETE void | |
| 693 | // OBSOLETE m32r_write_sp (CORE_ADDR val) | |
| 694 | // OBSOLETE { | |
| 695 | // OBSOLETE unsigned long psw = read_register (PSW_REGNUM); | |
| 696 | // OBSOLETE | |
| 697 | // OBSOLETE if (psw & 0x80) /* stack mode: user or interrupt */ | |
| 698 | // OBSOLETE write_register (SPU_REGNUM, val); | |
| 699 | // OBSOLETE else | |
| 700 | // OBSOLETE write_register (SPI_REGNUM, val); | |
| 701 | // OBSOLETE write_register (SP_REGNUM, val); | |
| 702 | // OBSOLETE } | |
| 703 | // OBSOLETE | |
| 704 | // OBSOLETE void | |
| 705 | // OBSOLETE _initialize_m32r_tdep (void) | |
| 706 | // OBSOLETE { | |
| 707 | // OBSOLETE tm_print_insn = print_insn_m32r; | |
| 708 | // OBSOLETE } |