projects / deliverable / binutils-gdb.git / blame
| Commit | Line | Data |
|---|---|---|
| 7a3085c1 AC |
1 | // OBSOLETE /* Target-dependent code for the Fujitsu FR30. |
| 2 | // OBSOLETE Copyright 1999, 2000, 2001 Free Software Foundation, Inc. | |
| 3 | // OBSOLETE | |
| 4 | // OBSOLETE This file is part of GDB. | |
| 5 | // OBSOLETE | |
| 6 | // OBSOLETE This program is free software; you can redistribute it and/or modify | |
| 7 | // OBSOLETE it under the terms of the GNU General Public License as published by | |
| 8 | // OBSOLETE the Free Software Foundation; either version 2 of the License, or | |
| 9 | // OBSOLETE (at your option) any later version. | |
| 10 | // OBSOLETE | |
| 11 | // OBSOLETE This program is distributed in the hope that it will be useful, | |
| 12 | // OBSOLETE but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | // OBSOLETE MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 14 | // OBSOLETE GNU General Public License for more details. | |
| 15 | // OBSOLETE | |
| 16 | // OBSOLETE You should have received a copy of the GNU General Public License | |
| 17 | // OBSOLETE along with this program; if not, write to the Free Software | |
| 18 | // OBSOLETE Foundation, Inc., 59 Temple Place - Suite 330, | |
| 19 | // OBSOLETE Boston, MA 02111-1307, USA. */ | |
| 20 | // OBSOLETE | |
| 21 | // OBSOLETE #include "defs.h" | |
| 22 | // OBSOLETE #include "frame.h" | |
| 23 | // OBSOLETE #include "inferior.h" | |
| 24 | // OBSOLETE #include "obstack.h" | |
| 25 | // OBSOLETE #include "target.h" | |
| 26 | // OBSOLETE #include "value.h" | |
| 27 | // OBSOLETE #include "bfd.h" | |
| 28 | // OBSOLETE #include "gdb_string.h" | |
| 29 | // OBSOLETE #include "gdbcore.h" | |
| 30 | // OBSOLETE #include "symfile.h" | |
| 31 | // OBSOLETE #include "regcache.h" | |
| 32 | // OBSOLETE | |
| 33 | // OBSOLETE /* An expression that tells us whether the function invocation represented | |
| 34 | // OBSOLETE by FI does not have a frame on the stack associated with it. */ | |
| 35 | // OBSOLETE int | |
| 36 | // OBSOLETE fr30_frameless_function_invocation (struct frame_info *fi) | |
| 37 | // OBSOLETE { | |
| 38 | // OBSOLETE int frameless; | |
| 39 | // OBSOLETE CORE_ADDR func_start, after_prologue; | |
| 40 | // OBSOLETE func_start = (get_pc_function_start ((fi)->pc) + | |
| 41 | // OBSOLETE FUNCTION_START_OFFSET); | |
| 42 | // OBSOLETE after_prologue = func_start; | |
| 43 | // OBSOLETE after_prologue = SKIP_PROLOGUE (after_prologue); | |
| 44 | // OBSOLETE frameless = (after_prologue == func_start); | |
| 45 | // OBSOLETE return frameless; | |
| 46 | // OBSOLETE } | |
| 47 | // OBSOLETE | |
| 48 | // OBSOLETE /* Function: pop_frame | |
| 49 | // OBSOLETE This routine gets called when either the user uses the `return' | |
| 50 | // OBSOLETE command, or the call dummy breakpoint gets hit. */ | |
| 51 | // OBSOLETE | |
| 52 | // OBSOLETE void | |
| 53 | // OBSOLETE fr30_pop_frame (void) | |
| 54 | // OBSOLETE { | |
| 55 | // OBSOLETE struct frame_info *frame = get_current_frame (); | |
| 56 | // OBSOLETE int regnum; | |
| 57 | // OBSOLETE CORE_ADDR sp = read_register (SP_REGNUM); | |
| 58 | // OBSOLETE | |
| 59 | // OBSOLETE if (PC_IN_CALL_DUMMY (frame->pc, frame->frame, frame->frame)) | |
| 60 | // OBSOLETE generic_pop_dummy_frame (); | |
| 61 | // OBSOLETE else | |
| 62 | // OBSOLETE { | |
| 63 | // OBSOLETE write_register (PC_REGNUM, FRAME_SAVED_PC (frame)); | |
| 64 | // OBSOLETE | |
| 65 | // OBSOLETE for (regnum = 0; regnum < NUM_REGS; regnum++) | |
| 66 | // OBSOLETE if (frame->fsr.regs[regnum] != 0) | |
| 67 | // OBSOLETE { | |
| 68 | // OBSOLETE write_register (regnum, | |
| 69 | // OBSOLETE read_memory_unsigned_integer (frame->fsr.regs[regnum], | |
| 70 | // OBSOLETE REGISTER_RAW_SIZE (regnum))); | |
| 71 | // OBSOLETE } | |
| 72 | // OBSOLETE write_register (SP_REGNUM, sp + frame->framesize); | |
| 73 | // OBSOLETE } | |
| 74 | // OBSOLETE flush_cached_frames (); | |
| 75 | // OBSOLETE } | |
| 76 | // OBSOLETE | |
| 77 | // OBSOLETE | |
| 78 | // OBSOLETE /* Function: fr30_store_return_value | |
| 79 | // OBSOLETE Put a value where a caller expects to see it. Used by the 'return' | |
| 80 | // OBSOLETE command. */ | |
| 81 | // OBSOLETE void | |
| 82 | // OBSOLETE fr30_store_return_value (struct type *type, | |
| 83 | // OBSOLETE char *valbuf) | |
| 84 | // OBSOLETE { | |
| 85 | // OBSOLETE /* Here's how the FR30 returns values (gleaned from gcc/config/ | |
| 86 | // OBSOLETE fr30/fr30.h): | |
| 87 | // OBSOLETE | |
| 88 | // OBSOLETE If the return value is 32 bits long or less, it goes in r4. | |
| 89 | // OBSOLETE | |
| 90 | // OBSOLETE If the return value is 64 bits long or less, it goes in r4 (most | |
| 91 | // OBSOLETE significant word) and r5 (least significant word. | |
| 92 | // OBSOLETE | |
| 93 | // OBSOLETE If the function returns a structure, of any size, the caller | |
| 94 | // OBSOLETE passes the function an invisible first argument where the callee | |
| 95 | // OBSOLETE should store the value. But GDB doesn't let you do that anyway. | |
| 96 | // OBSOLETE | |
| 97 | // OBSOLETE If you're returning a value smaller than a word, it's not really | |
| 98 | // OBSOLETE necessary to zero the upper bytes of the register; the caller is | |
| 99 | // OBSOLETE supposed to ignore them. However, the FR30 typically keeps its | |
| 100 | // OBSOLETE values extended to the full register width, so we should emulate | |
| 101 | // OBSOLETE that. */ | |
| 102 | // OBSOLETE | |
| 103 | // OBSOLETE /* The FR30 is big-endian, so if we return a small value (like a | |
| 104 | // OBSOLETE short or a char), we need to position it correctly within the | |
| 105 | // OBSOLETE register. We round the size up to a register boundary, and then | |
| 106 | // OBSOLETE adjust the offset so as to place the value at the right end. */ | |
| 107 | // OBSOLETE int value_size = TYPE_LENGTH (type); | |
| 108 | // OBSOLETE int returned_size = (value_size + FR30_REGSIZE - 1) & ~(FR30_REGSIZE - 1); | |
| 109 | // OBSOLETE int offset = (REGISTER_BYTE (RETVAL_REG) | |
| 110 | // OBSOLETE + (returned_size - value_size)); | |
| 111 | // OBSOLETE char *zeros = alloca (returned_size); | |
| 112 | // OBSOLETE memset (zeros, 0, returned_size); | |
| 113 | // OBSOLETE | |
| 114 | // OBSOLETE write_register_bytes (REGISTER_BYTE (RETVAL_REG), zeros, returned_size); | |
| 115 | // OBSOLETE write_register_bytes (offset, valbuf, value_size); | |
| 116 | // OBSOLETE } | |
| 117 | // OBSOLETE | |
| 118 | // OBSOLETE | |
| 119 | // OBSOLETE /* Function: skip_prologue | |
| 120 | // OBSOLETE Return the address of the first code past the prologue of the function. */ | |
| 121 | // OBSOLETE | |
| 122 | // OBSOLETE CORE_ADDR | |
| 123 | // OBSOLETE fr30_skip_prologue (CORE_ADDR pc) | |
| 124 | // OBSOLETE { | |
| 125 | // OBSOLETE CORE_ADDR func_addr, func_end; | |
| 126 | // OBSOLETE | |
| 127 | // OBSOLETE /* See what the symbol table says */ | |
| 128 | // OBSOLETE | |
| 129 | // OBSOLETE if (find_pc_partial_function (pc, NULL, &func_addr, &func_end)) | |
| 130 | // OBSOLETE { | |
| 131 | // OBSOLETE struct symtab_and_line sal; | |
| 132 | // OBSOLETE | |
| 133 | // OBSOLETE sal = find_pc_line (func_addr, 0); | |
| 134 | // OBSOLETE | |
| 135 | // OBSOLETE if (sal.line != 0 && sal.end < func_end) | |
| 136 | // OBSOLETE { | |
| 137 | // OBSOLETE return sal.end; | |
| 138 | // OBSOLETE } | |
| 139 | // OBSOLETE } | |
| 140 | // OBSOLETE | |
| 141 | // OBSOLETE /* Either we didn't find the start of this function (nothing we can do), | |
| 142 | // OBSOLETE or there's no line info, or the line after the prologue is after | |
| 143 | // OBSOLETE the end of the function (there probably isn't a prologue). */ | |
| 144 | // OBSOLETE | |
| 145 | // OBSOLETE return pc; | |
| 146 | // OBSOLETE } | |
| 147 | // OBSOLETE | |
| 148 | // OBSOLETE | |
| 149 | // OBSOLETE /* Function: push_arguments | |
| 150 | // OBSOLETE Setup arguments and RP for a call to the target. First four args | |
| 151 | // OBSOLETE go in FIRST_ARGREG -> LAST_ARGREG, subsequent args go on stack... | |
| 152 | // OBSOLETE Structs are passed by reference. XXX not right now Z.R. | |
| 153 | // OBSOLETE 64 bit quantities (doubles and long longs) may be split between | |
| 154 | // OBSOLETE the regs and the stack. | |
| 155 | // OBSOLETE When calling a function that returns a struct, a pointer to the struct | |
| 156 | // OBSOLETE is passed in as a secret first argument (always in FIRST_ARGREG). | |
| 157 | // OBSOLETE | |
| 158 | // OBSOLETE Stack space for the args has NOT been allocated: that job is up to us. | |
| 159 | // OBSOLETE */ | |
| 160 | // OBSOLETE | |
| 161 | // OBSOLETE CORE_ADDR | |
| 162 | // OBSOLETE fr30_push_arguments (int nargs, struct value **args, CORE_ADDR sp, | |
| 163 | // OBSOLETE int struct_return, CORE_ADDR struct_addr) | |
| 164 | // OBSOLETE { | |
| 165 | // OBSOLETE int argreg; | |
| 166 | // OBSOLETE int argnum; | |
| 167 | // OBSOLETE int stack_offset; | |
| 168 | // OBSOLETE struct stack_arg | |
| 169 | // OBSOLETE { | |
| 170 | // OBSOLETE char *val; | |
| 171 | // OBSOLETE int len; | |
| 172 | // OBSOLETE int offset; | |
| 173 | // OBSOLETE }; | |
| 174 | // OBSOLETE struct stack_arg *stack_args = | |
| 175 | // OBSOLETE (struct stack_arg *) alloca (nargs * sizeof (struct stack_arg)); | |
| 176 | // OBSOLETE int nstack_args = 0; | |
| 177 | // OBSOLETE | |
| 178 | // OBSOLETE argreg = FIRST_ARGREG; | |
| 179 | // OBSOLETE | |
| 180 | // OBSOLETE /* the struct_return pointer occupies the first parameter-passing reg */ | |
| 181 | // OBSOLETE if (struct_return) | |
| 182 | // OBSOLETE write_register (argreg++, struct_addr); | |
| 183 | // OBSOLETE | |
| 184 | // OBSOLETE stack_offset = 0; | |
| 185 | // OBSOLETE | |
| 186 | // OBSOLETE /* Process args from left to right. Store as many as allowed in | |
| 187 | // OBSOLETE registers, save the rest to be pushed on the stack */ | |
| 188 | // OBSOLETE for (argnum = 0; argnum < nargs; argnum++) | |
| 189 | // OBSOLETE { | |
| 190 | // OBSOLETE char *val; | |
| 191 | // OBSOLETE struct value *arg = args[argnum]; | |
| 192 | // OBSOLETE struct type *arg_type = check_typedef (VALUE_TYPE (arg)); | |
| 193 | // OBSOLETE struct type *target_type = TYPE_TARGET_TYPE (arg_type); | |
| 194 | // OBSOLETE int len = TYPE_LENGTH (arg_type); | |
| 195 | // OBSOLETE enum type_code typecode = TYPE_CODE (arg_type); | |
| 196 | // OBSOLETE CORE_ADDR regval; | |
| 197 | // OBSOLETE int newarg; | |
| 198 | // OBSOLETE | |
| 199 | // OBSOLETE val = (char *) VALUE_CONTENTS (arg); | |
| 200 | // OBSOLETE | |
| 201 | // OBSOLETE { | |
| 202 | // OBSOLETE /* Copy the argument to general registers or the stack in | |
| 203 | // OBSOLETE register-sized pieces. Large arguments are split between | |
| 204 | // OBSOLETE registers and stack. */ | |
| 205 | // OBSOLETE while (len > 0) | |
| 206 | // OBSOLETE { | |
| 207 | // OBSOLETE if (argreg <= LAST_ARGREG) | |
| 208 | // OBSOLETE { | |
| 209 | // OBSOLETE int partial_len = len < REGISTER_SIZE ? len : REGISTER_SIZE; | |
| 210 | // OBSOLETE regval = extract_address (val, partial_len); | |
| 211 | // OBSOLETE | |
| 212 | // OBSOLETE /* It's a simple argument being passed in a general | |
| 213 | // OBSOLETE register. */ | |
| 214 | // OBSOLETE write_register (argreg, regval); | |
| 215 | // OBSOLETE argreg++; | |
| 216 | // OBSOLETE len -= partial_len; | |
| 217 | // OBSOLETE val += partial_len; | |
| 218 | // OBSOLETE } | |
| 219 | // OBSOLETE else | |
| 220 | // OBSOLETE { | |
| 221 | // OBSOLETE /* keep for later pushing */ | |
| 222 | // OBSOLETE stack_args[nstack_args].val = val; | |
| 223 | // OBSOLETE stack_args[nstack_args++].len = len; | |
| 224 | // OBSOLETE break; | |
| 225 | // OBSOLETE } | |
| 226 | // OBSOLETE } | |
| 227 | // OBSOLETE } | |
| 228 | // OBSOLETE } | |
| 229 | // OBSOLETE /* now do the real stack pushing, process args right to left */ | |
| 230 | // OBSOLETE while (nstack_args--) | |
| 231 | // OBSOLETE { | |
| 232 | // OBSOLETE sp -= stack_args[nstack_args].len; | |
| 233 | // OBSOLETE write_memory (sp, stack_args[nstack_args].val, | |
| 234 | // OBSOLETE stack_args[nstack_args].len); | |
| 235 | // OBSOLETE } | |
| 236 | // OBSOLETE | |
| 237 | // OBSOLETE /* Return adjusted stack pointer. */ | |
| 238 | // OBSOLETE return sp; | |
| 239 | // OBSOLETE } | |
| 240 | // OBSOLETE | |
| 241 | // OBSOLETE void _initialize_fr30_tdep (void); | |
| 242 | // OBSOLETE | |
| 243 | // OBSOLETE void | |
| 244 | // OBSOLETE _initialize_fr30_tdep (void) | |
| 245 | // OBSOLETE { | |
| 246 | // OBSOLETE extern int print_insn_fr30 (bfd_vma, disassemble_info *); | |
| 247 | // OBSOLETE tm_print_insn = print_insn_fr30; | |
| 248 | // OBSOLETE } | |
| 249 | // OBSOLETE | |
| 250 | // OBSOLETE /* Function: check_prologue_cache | |
| 251 | // OBSOLETE Check if prologue for this frame's PC has already been scanned. | |
| 252 | // OBSOLETE If it has, copy the relevant information about that prologue and | |
| 253 | // OBSOLETE return non-zero. Otherwise do not copy anything and return zero. | |
| 254 | // OBSOLETE | |
| 255 | // OBSOLETE The information saved in the cache includes: | |
| 256 | // OBSOLETE * the frame register number; | |
| 257 | // OBSOLETE * the size of the stack frame; | |
| 258 | // OBSOLETE * the offsets of saved regs (relative to the old SP); and | |
| 259 | // OBSOLETE * the offset from the stack pointer to the frame pointer | |
| 260 | // OBSOLETE | |
| 261 | // OBSOLETE The cache contains only one entry, since this is adequate | |
| 262 | // OBSOLETE for the typical sequence of prologue scan requests we get. | |
| 263 | // OBSOLETE When performing a backtrace, GDB will usually ask to scan | |
| 264 | // OBSOLETE the same function twice in a row (once to get the frame chain, | |
| 265 | // OBSOLETE and once to fill in the extra frame information). | |
| 266 | // OBSOLETE */ | |
| 267 | // OBSOLETE | |
| 268 | // OBSOLETE static struct frame_info prologue_cache; | |
| 269 | // OBSOLETE | |
| 270 | // OBSOLETE static int | |
| 271 | // OBSOLETE check_prologue_cache (struct frame_info *fi) | |
| 272 | // OBSOLETE { | |
| 273 | // OBSOLETE int i; | |
| 274 | // OBSOLETE | |
| 275 | // OBSOLETE if (fi->pc == prologue_cache.pc) | |
| 276 | // OBSOLETE { | |
| 277 | // OBSOLETE fi->framereg = prologue_cache.framereg; | |
| 278 | // OBSOLETE fi->framesize = prologue_cache.framesize; | |
| 279 | // OBSOLETE fi->frameoffset = prologue_cache.frameoffset; | |
| 280 | // OBSOLETE for (i = 0; i <= NUM_REGS; i++) | |
| 281 | // OBSOLETE fi->fsr.regs[i] = prologue_cache.fsr.regs[i]; | |
| 282 | // OBSOLETE return 1; | |
| 283 | // OBSOLETE } | |
| 284 | // OBSOLETE else | |
| 285 | // OBSOLETE return 0; | |
| 286 | // OBSOLETE } | |
| 287 | // OBSOLETE | |
| 288 | // OBSOLETE | |
| 289 | // OBSOLETE /* Function: save_prologue_cache | |
| 290 | // OBSOLETE Copy the prologue information from fi to the prologue cache. | |
| 291 | // OBSOLETE */ | |
| 292 | // OBSOLETE | |
| 293 | // OBSOLETE static void | |
| 294 | // OBSOLETE save_prologue_cache (struct frame_info *fi) | |
| 295 | // OBSOLETE { | |
| 296 | // OBSOLETE int i; | |
| 297 | // OBSOLETE | |
| 298 | // OBSOLETE prologue_cache.pc = fi->pc; | |
| 299 | // OBSOLETE prologue_cache.framereg = fi->framereg; | |
| 300 | // OBSOLETE prologue_cache.framesize = fi->framesize; | |
| 301 | // OBSOLETE prologue_cache.frameoffset = fi->frameoffset; | |
| 302 | // OBSOLETE | |
| 303 | // OBSOLETE for (i = 0; i <= NUM_REGS; i++) | |
| 304 | // OBSOLETE { | |
| 305 | // OBSOLETE prologue_cache.fsr.regs[i] = fi->fsr.regs[i]; | |
| 306 | // OBSOLETE } | |
| 307 | // OBSOLETE } | |
| 308 | // OBSOLETE | |
| 309 | // OBSOLETE | |
| 310 | // OBSOLETE /* Function: scan_prologue | |
| 311 | // OBSOLETE Scan the prologue of the function that contains PC, and record what | |
| 312 | // OBSOLETE we find in PI. PI->fsr must be zeroed by the called. Returns the | |
| 313 | // OBSOLETE pc after the prologue. Note that the addresses saved in pi->fsr | |
| 314 | // OBSOLETE are actually just frame relative (negative offsets from the frame | |
| 315 | // OBSOLETE pointer). This is because we don't know the actual value of the | |
| 316 | // OBSOLETE frame pointer yet. In some circumstances, the frame pointer can't | |
| 317 | // OBSOLETE be determined till after we have scanned the prologue. */ | |
| 318 | // OBSOLETE | |
| 319 | // OBSOLETE static void | |
| 320 | // OBSOLETE fr30_scan_prologue (struct frame_info *fi) | |
| 321 | // OBSOLETE { | |
| 322 | // OBSOLETE int sp_offset, fp_offset; | |
| 323 | // OBSOLETE CORE_ADDR prologue_start, prologue_end, current_pc; | |
| 324 | // OBSOLETE | |
| 325 | // OBSOLETE /* Check if this function is already in the cache of frame information. */ | |
| 326 | // OBSOLETE if (check_prologue_cache (fi)) | |
| 327 | // OBSOLETE return; | |
| 328 | // OBSOLETE | |
| 329 | // OBSOLETE /* Assume there is no frame until proven otherwise. */ | |
| 330 | // OBSOLETE fi->framereg = SP_REGNUM; | |
| 331 | // OBSOLETE fi->framesize = 0; | |
| 332 | // OBSOLETE fi->frameoffset = 0; | |
| 333 | // OBSOLETE | |
| 334 | // OBSOLETE /* Find the function prologue. If we can't find the function in | |
| 335 | // OBSOLETE the symbol table, peek in the stack frame to find the PC. */ | |
| 336 | // OBSOLETE if (find_pc_partial_function (fi->pc, NULL, &prologue_start, &prologue_end)) | |
| 337 | // OBSOLETE { | |
| 338 | // OBSOLETE /* Assume the prologue is everything between the first instruction | |
| 339 | // OBSOLETE in the function and the first source line. */ | |
| 340 | // OBSOLETE struct symtab_and_line sal = find_pc_line (prologue_start, 0); | |
| 341 | // OBSOLETE | |
| 342 | // OBSOLETE if (sal.line == 0) /* no line info, use current PC */ | |
| 343 | // OBSOLETE prologue_end = fi->pc; | |
| 344 | // OBSOLETE else if (sal.end < prologue_end) /* next line begins after fn end */ | |
| 345 | // OBSOLETE prologue_end = sal.end; /* (probably means no prologue) */ | |
| 346 | // OBSOLETE } | |
| 347 | // OBSOLETE else | |
| 348 | // OBSOLETE { | |
| 349 | // OBSOLETE /* XXX Z.R. What now??? The following is entirely bogus */ | |
| 350 | // OBSOLETE prologue_start = (read_memory_integer (fi->frame, 4) & 0x03fffffc) - 12; | |
| 351 | // OBSOLETE prologue_end = prologue_start + 40; | |
| 352 | // OBSOLETE } | |
| 353 | // OBSOLETE | |
| 354 | // OBSOLETE /* Now search the prologue looking for instructions that set up the | |
| 355 | // OBSOLETE frame pointer, adjust the stack pointer, and save registers. */ | |
| 356 | // OBSOLETE | |
| 357 | // OBSOLETE sp_offset = fp_offset = 0; | |
| 358 | // OBSOLETE for (current_pc = prologue_start; current_pc < prologue_end; current_pc += 2) | |
| 359 | // OBSOLETE { | |
| 360 | // OBSOLETE unsigned int insn; | |
| 361 | // OBSOLETE | |
| 362 | // OBSOLETE insn = read_memory_unsigned_integer (current_pc, 2); | |
| 363 | // OBSOLETE | |
| 364 | // OBSOLETE if ((insn & 0xfe00) == 0x8e00) /* stm0 or stm1 */ | |
| 365 | // OBSOLETE { | |
| 366 | // OBSOLETE int reg, mask = insn & 0xff; | |
| 367 | // OBSOLETE | |
| 368 | // OBSOLETE /* scan in one sweep - create virtual 16-bit mask from either insn's mask */ | |
| 369 | // OBSOLETE if ((insn & 0x0100) == 0) | |
| 370 | // OBSOLETE { | |
| 371 | // OBSOLETE mask <<= 8; /* stm0 - move to upper byte in virtual mask */ | |
| 372 | // OBSOLETE } | |
| 373 | // OBSOLETE | |
| 374 | // OBSOLETE /* Calculate offsets of saved registers (to be turned later into addresses). */ | |
| 375 | // OBSOLETE for (reg = R4_REGNUM; reg <= R11_REGNUM; reg++) | |
| 376 | // OBSOLETE if (mask & (1 << (15 - reg))) | |
| 377 | // OBSOLETE { | |
| 378 | // OBSOLETE sp_offset -= 4; | |
| 379 | // OBSOLETE fi->fsr.regs[reg] = sp_offset; | |
| 380 | // OBSOLETE } | |
| 381 | // OBSOLETE } | |
| 382 | // OBSOLETE else if ((insn & 0xfff0) == 0x1700) /* st rx,@-r15 */ | |
| 383 | // OBSOLETE { | |
| 384 | // OBSOLETE int reg = insn & 0xf; | |
| 385 | // OBSOLETE | |
| 386 | // OBSOLETE sp_offset -= 4; | |
| 387 | // OBSOLETE fi->fsr.regs[reg] = sp_offset; | |
| 388 | // OBSOLETE } | |
| 389 | // OBSOLETE else if ((insn & 0xff00) == 0x0f00) /* enter */ | |
| 390 | // OBSOLETE { | |
| 391 | // OBSOLETE fp_offset = fi->fsr.regs[FP_REGNUM] = sp_offset - 4; | |
| 392 | // OBSOLETE sp_offset -= 4 * (insn & 0xff); | |
| 393 | // OBSOLETE fi->framereg = FP_REGNUM; | |
| 394 | // OBSOLETE } | |
| 395 | // OBSOLETE else if (insn == 0x1781) /* st rp,@-sp */ | |
| 396 | // OBSOLETE { | |
| 397 | // OBSOLETE sp_offset -= 4; | |
| 398 | // OBSOLETE fi->fsr.regs[RP_REGNUM] = sp_offset; | |
| 399 | // OBSOLETE } | |
| 400 | // OBSOLETE else if (insn == 0x170e) /* st fp,@-sp */ | |
| 401 | // OBSOLETE { | |
| 402 | // OBSOLETE sp_offset -= 4; | |
| 403 | // OBSOLETE fi->fsr.regs[FP_REGNUM] = sp_offset; | |
| 404 | // OBSOLETE } | |
| 405 | // OBSOLETE else if (insn == 0x8bfe) /* mov sp,fp */ | |
| 406 | // OBSOLETE { | |
| 407 | // OBSOLETE fi->framereg = FP_REGNUM; | |
| 408 | // OBSOLETE } | |
| 409 | // OBSOLETE else if ((insn & 0xff00) == 0xa300) /* addsp xx */ | |
| 410 | // OBSOLETE { | |
| 411 | // OBSOLETE sp_offset += 4 * (signed char) (insn & 0xff); | |
| 412 | // OBSOLETE } | |
| 413 | // OBSOLETE else if ((insn & 0xff0f) == 0x9b00 && /* ldi:20 xx,r0 */ | |
| 414 | // OBSOLETE read_memory_unsigned_integer (current_pc + 4, 2) | |
| 415 | // OBSOLETE == 0xac0f) /* sub r0,sp */ | |
| 416 | // OBSOLETE { | |
| 417 | // OBSOLETE /* large stack adjustment */ | |
| 418 | // OBSOLETE sp_offset -= (((insn & 0xf0) << 12) | read_memory_unsigned_integer (current_pc + 2, 2)); | |
| 419 | // OBSOLETE current_pc += 4; | |
| 420 | // OBSOLETE } | |
| 421 | // OBSOLETE else if (insn == 0x9f80 && /* ldi:32 xx,r0 */ | |
| 422 | // OBSOLETE read_memory_unsigned_integer (current_pc + 6, 2) | |
| 423 | // OBSOLETE == 0xac0f) /* sub r0,sp */ | |
| 424 | // OBSOLETE { | |
| 425 | // OBSOLETE /* large stack adjustment */ | |
| 426 | // OBSOLETE sp_offset -= | |
| 427 | // OBSOLETE (read_memory_unsigned_integer (current_pc + 2, 2) << 16 | | |
| 428 | // OBSOLETE read_memory_unsigned_integer (current_pc + 4, 2)); | |
| 429 | // OBSOLETE current_pc += 6; | |
| 430 | // OBSOLETE } | |
| 431 | // OBSOLETE } | |
| 432 | // OBSOLETE | |
| 433 | // OBSOLETE /* The frame size is just the negative of the offset (from the original SP) | |
| 434 | // OBSOLETE of the last thing thing we pushed on the stack. The frame offset is | |
| 435 | // OBSOLETE [new FP] - [new SP]. */ | |
| 436 | // OBSOLETE fi->framesize = -sp_offset; | |
| 437 | // OBSOLETE fi->frameoffset = fp_offset - sp_offset; | |
| 438 | // OBSOLETE | |
| 439 | // OBSOLETE save_prologue_cache (fi); | |
| 440 | // OBSOLETE } | |
| 441 | // OBSOLETE | |
| 442 | // OBSOLETE /* Function: init_extra_frame_info | |
| 443 | // OBSOLETE Setup the frame's frame pointer, pc, and frame addresses for saved | |
| 444 | // OBSOLETE registers. Most of the work is done in scan_prologue(). | |
| 445 | // OBSOLETE | |
| 446 | // OBSOLETE Note that when we are called for the last frame (currently active frame), | |
| 447 | // OBSOLETE that fi->pc and fi->frame will already be setup. However, fi->frame will | |
| 448 | // OBSOLETE be valid only if this routine uses FP. For previous frames, fi-frame will | |
| 449 | // OBSOLETE always be correct (since that is derived from fr30_frame_chain ()). | |
| 450 | // OBSOLETE | |
| 451 | // OBSOLETE We can be called with the PC in the call dummy under two circumstances. | |
| 452 | // OBSOLETE First, during normal backtracing, second, while figuring out the frame | |
| 453 | // OBSOLETE pointer just prior to calling the target function (see run_stack_dummy). */ | |
| 454 | // OBSOLETE | |
| 455 | // OBSOLETE void | |
| 456 | // OBSOLETE fr30_init_extra_frame_info (struct frame_info *fi) | |
| 457 | // OBSOLETE { | |
| 458 | // OBSOLETE int reg; | |
| 459 | // OBSOLETE | |
| 460 | // OBSOLETE if (fi->next) | |
| 461 | // OBSOLETE fi->pc = FRAME_SAVED_PC (fi->next); | |
| 462 | // OBSOLETE | |
| 463 | // OBSOLETE memset (fi->fsr.regs, '\000', sizeof fi->fsr.regs); | |
| 464 | // OBSOLETE | |
| 465 | // OBSOLETE if (PC_IN_CALL_DUMMY (fi->pc, fi->frame, fi->frame)) | |
| 466 | // OBSOLETE { | |
| 467 | // OBSOLETE /* We need to setup fi->frame here because run_stack_dummy gets it wrong | |
| 468 | // OBSOLETE by assuming it's always FP. */ | |
| 469 | // OBSOLETE fi->frame = generic_read_register_dummy (fi->pc, fi->frame, SP_REGNUM); | |
| 470 | // OBSOLETE fi->framesize = 0; | |
| 471 | // OBSOLETE fi->frameoffset = 0; | |
| 472 | // OBSOLETE return; | |
| 473 | // OBSOLETE } | |
| 474 | // OBSOLETE fr30_scan_prologue (fi); | |
| 475 | // OBSOLETE | |
| 476 | // OBSOLETE if (!fi->next) /* this is the innermost frame? */ | |
| 477 | // OBSOLETE fi->frame = read_register (fi->framereg); | |
| 478 | // OBSOLETE else | |
| 479 | // OBSOLETE /* not the innermost frame */ | |
| 480 | // OBSOLETE /* If we have an FP, the callee saved it. */ | |
| 481 | // OBSOLETE if (fi->framereg == FP_REGNUM) | |
| 482 | // OBSOLETE if (fi->next->fsr.regs[fi->framereg] != 0) | |
| 483 | // OBSOLETE fi->frame = read_memory_integer (fi->next->fsr.regs[fi->framereg], 4); | |
| 484 | // OBSOLETE | |
| 485 | // OBSOLETE /* Calculate actual addresses of saved registers using offsets determined | |
| 486 | // OBSOLETE by fr30_scan_prologue. */ | |
| 487 | // OBSOLETE for (reg = 0; reg < NUM_REGS; reg++) | |
| 488 | // OBSOLETE if (fi->fsr.regs[reg] != 0) | |
| 489 | // OBSOLETE { | |
| 490 | // OBSOLETE fi->fsr.regs[reg] += fi->frame + fi->framesize - fi->frameoffset; | |
| 491 | // OBSOLETE } | |
| 492 | // OBSOLETE } | |
| 493 | // OBSOLETE | |
| 494 | // OBSOLETE /* Function: find_callers_reg | |
| 495 | // OBSOLETE Find REGNUM on the stack. Otherwise, it's in an active register. | |
| 496 | // OBSOLETE One thing we might want to do here is to check REGNUM against the | |
| 497 | // OBSOLETE clobber mask, and somehow flag it as invalid if it isn't saved on | |
| 498 | // OBSOLETE the stack somewhere. This would provide a graceful failure mode | |
| 499 | // OBSOLETE when trying to get the value of caller-saves registers for an inner | |
| 500 | // OBSOLETE frame. */ | |
| 501 | // OBSOLETE | |
| 502 | // OBSOLETE CORE_ADDR | |
| 503 | // OBSOLETE fr30_find_callers_reg (struct frame_info *fi, int regnum) | |
| 504 | // OBSOLETE { | |
| 505 | // OBSOLETE for (; fi; fi = fi->next) | |
| 506 | // OBSOLETE if (PC_IN_CALL_DUMMY (fi->pc, fi->frame, fi->frame)) | |
| 507 | // OBSOLETE return generic_read_register_dummy (fi->pc, fi->frame, regnum); | |
| 508 | // OBSOLETE else if (fi->fsr.regs[regnum] != 0) | |
| 509 | // OBSOLETE return read_memory_unsigned_integer (fi->fsr.regs[regnum], | |
| 510 | // OBSOLETE REGISTER_RAW_SIZE (regnum)); | |
| 511 | // OBSOLETE | |
| 512 | // OBSOLETE return read_register (regnum); | |
| 513 | // OBSOLETE } | |
| 514 | // OBSOLETE | |
| 515 | // OBSOLETE | |
| 516 | // OBSOLETE /* Function: frame_chain | |
| 517 | // OBSOLETE Figure out the frame prior to FI. Unfortunately, this involves | |
| 518 | // OBSOLETE scanning the prologue of the caller, which will also be done | |
| 519 | // OBSOLETE shortly by fr30_init_extra_frame_info. For the dummy frame, we | |
| 520 | // OBSOLETE just return the stack pointer that was in use at the time the | |
| 521 | // OBSOLETE function call was made. */ | |
| 522 | // OBSOLETE | |
| 523 | // OBSOLETE | |
| 524 | // OBSOLETE CORE_ADDR | |
| 525 | // OBSOLETE fr30_frame_chain (struct frame_info *fi) | |
| 526 | // OBSOLETE { | |
| 527 | // OBSOLETE CORE_ADDR fn_start, callers_pc, fp; | |
| 528 | // OBSOLETE struct frame_info caller_fi; | |
| 529 | // OBSOLETE int framereg; | |
| 530 | // OBSOLETE | |
| 531 | // OBSOLETE /* is this a dummy frame? */ | |
| 532 | // OBSOLETE if (PC_IN_CALL_DUMMY (fi->pc, fi->frame, fi->frame)) | |
| 533 | // OBSOLETE return fi->frame; /* dummy frame same as caller's frame */ | |
| 534 | // OBSOLETE | |
| 535 | // OBSOLETE /* is caller-of-this a dummy frame? */ | |
| 536 | // OBSOLETE callers_pc = FRAME_SAVED_PC (fi); /* find out who called us: */ | |
| 537 | // OBSOLETE fp = fr30_find_callers_reg (fi, FP_REGNUM); | |
| 538 | // OBSOLETE if (PC_IN_CALL_DUMMY (callers_pc, fp, fp)) | |
| 539 | // OBSOLETE return fp; /* dummy frame's frame may bear no relation to ours */ | |
| 540 | // OBSOLETE | |
| 541 | // OBSOLETE if (find_pc_partial_function (fi->pc, 0, &fn_start, 0)) | |
| 542 | // OBSOLETE if (fn_start == entry_point_address ()) | |
| 543 | // OBSOLETE return 0; /* in _start fn, don't chain further */ | |
| 544 | // OBSOLETE | |
| 545 | // OBSOLETE framereg = fi->framereg; | |
| 546 | // OBSOLETE | |
| 547 | // OBSOLETE /* If the caller is the startup code, we're at the end of the chain. */ | |
| 548 | // OBSOLETE if (find_pc_partial_function (callers_pc, 0, &fn_start, 0)) | |
| 549 | // OBSOLETE if (fn_start == entry_point_address ()) | |
| 550 | // OBSOLETE return 0; | |
| 551 | // OBSOLETE | |
| 552 | // OBSOLETE memset (&caller_fi, 0, sizeof (caller_fi)); | |
| 553 | // OBSOLETE caller_fi.pc = callers_pc; | |
| 554 | // OBSOLETE fr30_scan_prologue (&caller_fi); | |
| 555 | // OBSOLETE framereg = caller_fi.framereg; | |
| 556 | // OBSOLETE | |
| 557 | // OBSOLETE /* If the caller used a frame register, return its value. | |
| 558 | // OBSOLETE Otherwise, return the caller's stack pointer. */ | |
| 559 | // OBSOLETE if (framereg == FP_REGNUM) | |
| 560 | // OBSOLETE return fr30_find_callers_reg (fi, framereg); | |
| 561 | // OBSOLETE else | |
| 562 | // OBSOLETE return fi->frame + fi->framesize; | |
| 563 | // OBSOLETE } | |
| 564 | // OBSOLETE | |
| 565 | // OBSOLETE /* Function: frame_saved_pc | |
| 566 | // OBSOLETE Find the caller of this frame. We do this by seeing if RP_REGNUM | |
| 567 | // OBSOLETE is saved in the stack anywhere, otherwise we get it from the | |
| 568 | // OBSOLETE registers. If the inner frame is a dummy frame, return its PC | |
| 569 | // OBSOLETE instead of RP, because that's where "caller" of the dummy-frame | |
| 570 | // OBSOLETE will be found. */ | |
| 571 | // OBSOLETE | |
| 572 | // OBSOLETE CORE_ADDR | |
| 573 | // OBSOLETE fr30_frame_saved_pc (struct frame_info *fi) | |
| 574 | // OBSOLETE { | |
| 575 | // OBSOLETE if (PC_IN_CALL_DUMMY (fi->pc, fi->frame, fi->frame)) | |
| 576 | // OBSOLETE return generic_read_register_dummy (fi->pc, fi->frame, PC_REGNUM); | |
| 577 | // OBSOLETE else | |
| 578 | // OBSOLETE return fr30_find_callers_reg (fi, RP_REGNUM); | |
| 579 | // OBSOLETE } | |
| 580 | // OBSOLETE | |
| 581 | // OBSOLETE /* Function: fix_call_dummy | |
| 582 | // OBSOLETE Pokes the callee function's address into the CALL_DUMMY assembly stub. | |
| 583 | // OBSOLETE Assumes that the CALL_DUMMY looks like this: | |
| 584 | // OBSOLETE jarl <offset24>, r31 | |
| 585 | // OBSOLETE trap | |
| 586 | // OBSOLETE */ | |
| 587 | // OBSOLETE | |
| 588 | // OBSOLETE int | |
| 589 | // OBSOLETE fr30_fix_call_dummy (char *dummy, CORE_ADDR sp, CORE_ADDR fun, int nargs, | |
| 590 | // OBSOLETE struct value **args, struct type *type, int gcc_p) | |
| 591 | // OBSOLETE { | |
| 592 | // OBSOLETE long offset24; | |
| 593 | // OBSOLETE | |
| 594 | // OBSOLETE offset24 = (long) fun - (long) entry_point_address (); | |
| 595 | // OBSOLETE offset24 &= 0x3fffff; | |
| 596 | // OBSOLETE offset24 |= 0xff800000; /* jarl <offset24>, r31 */ | |
| 597 | // OBSOLETE | |
| 598 | // OBSOLETE store_unsigned_integer ((unsigned int *) &dummy[2], 2, offset24 & 0xffff); | |
| 599 | // OBSOLETE store_unsigned_integer ((unsigned int *) &dummy[0], 2, offset24 >> 16); | |
| 600 | // OBSOLETE return 0; | |
| 601 | // OBSOLETE } |