| 1 | // OBSOLETE /* Target-dependent code for the Matsushita MN10200 for GDB, the GNU debugger. |
| 2 | // OBSOLETE |
| 3 | // OBSOLETE Copyright 1997, 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 |
| 35 | // OBSOLETE /* Should call_function allocate stack space for a struct return? */ |
| 36 | // OBSOLETE int |
| 37 | // OBSOLETE mn10200_use_struct_convention (int gcc_p, struct type *type) |
| 38 | // OBSOLETE { |
| 39 | // OBSOLETE return (TYPE_NFIELDS (type) > 1 || TYPE_LENGTH (type) > 8); |
| 40 | // OBSOLETE } |
| 41 | // OBSOLETE /* *INDENT-OFF* */ |
| 42 | // OBSOLETE /* The main purpose of this file is dealing with prologues to extract |
| 43 | // OBSOLETE information about stack frames and saved registers. |
| 44 | // OBSOLETE |
| 45 | // OBSOLETE For reference here's how prologues look on the mn10200: |
| 46 | // OBSOLETE |
| 47 | // OBSOLETE With frame pointer: |
| 48 | // OBSOLETE mov fp,a0 |
| 49 | // OBSOLETE mov sp,fp |
| 50 | // OBSOLETE add <size>,sp |
| 51 | // OBSOLETE Register saves for d2, d3, a1, a2 as needed. Saves start |
| 52 | // OBSOLETE at fp - <size> + <outgoing_args_size> and work towards higher |
| 53 | // OBSOLETE addresses. Note that the saves are actually done off the stack |
| 54 | // OBSOLETE pointer in the prologue! This makes for smaller code and easier |
| 55 | // OBSOLETE prologue scanning as the displacement fields will unlikely |
| 56 | // OBSOLETE be more than 8 bits! |
| 57 | // OBSOLETE |
| 58 | // OBSOLETE Without frame pointer: |
| 59 | // OBSOLETE add <size>,sp |
| 60 | // OBSOLETE Register saves for d2, d3, a1, a2 as needed. Saves start |
| 61 | // OBSOLETE at sp + <outgoing_args_size> and work towards higher addresses. |
| 62 | // OBSOLETE |
| 63 | // OBSOLETE Out of line prologue: |
| 64 | // OBSOLETE add <local size>,sp -- optional |
| 65 | // OBSOLETE jsr __prologue |
| 66 | // OBSOLETE add <outgoing_size>,sp -- optional |
| 67 | // OBSOLETE |
| 68 | // OBSOLETE The stack pointer remains constant throughout the life of most |
| 69 | // OBSOLETE functions. As a result the compiler will usually omit the |
| 70 | // OBSOLETE frame pointer, so we must handle frame pointerless functions. */ |
| 71 | // OBSOLETE |
| 72 | // OBSOLETE /* Analyze the prologue to determine where registers are saved, |
| 73 | // OBSOLETE the end of the prologue, etc etc. Return the end of the prologue |
| 74 | // OBSOLETE scanned. |
| 75 | // OBSOLETE |
| 76 | // OBSOLETE We store into FI (if non-null) several tidbits of information: |
| 77 | // OBSOLETE |
| 78 | // OBSOLETE * stack_size -- size of this stack frame. Note that if we stop in |
| 79 | // OBSOLETE certain parts of the prologue/epilogue we may claim the size of the |
| 80 | // OBSOLETE current frame is zero. This happens when the current frame has |
| 81 | // OBSOLETE not been allocated yet or has already been deallocated. |
| 82 | // OBSOLETE |
| 83 | // OBSOLETE * fsr -- Addresses of registers saved in the stack by this frame. |
| 84 | // OBSOLETE |
| 85 | // OBSOLETE * status -- A (relatively) generic status indicator. It's a bitmask |
| 86 | // OBSOLETE with the following bits: |
| 87 | // OBSOLETE |
| 88 | // OBSOLETE MY_FRAME_IN_SP: The base of the current frame is actually in |
| 89 | // OBSOLETE the stack pointer. This can happen for frame pointerless |
| 90 | // OBSOLETE functions, or cases where we're stopped in the prologue/epilogue |
| 91 | // OBSOLETE itself. For these cases mn10200_analyze_prologue will need up |
| 92 | // OBSOLETE update fi->frame before returning or analyzing the register |
| 93 | // OBSOLETE save instructions. |
| 94 | // OBSOLETE |
| 95 | // OBSOLETE MY_FRAME_IN_FP: The base of the current frame is in the |
| 96 | // OBSOLETE frame pointer register ($a2). |
| 97 | // OBSOLETE |
| 98 | // OBSOLETE CALLER_A2_IN_A0: $a2 from the caller's frame is temporarily |
| 99 | // OBSOLETE in $a0. This can happen if we're stopped in the prologue. |
| 100 | // OBSOLETE |
| 101 | // OBSOLETE NO_MORE_FRAMES: Set this if the current frame is "start" or |
| 102 | // OBSOLETE if the first instruction looks like mov <imm>,sp. This tells |
| 103 | // OBSOLETE frame chain to not bother trying to unwind past this frame. */ |
| 104 | // OBSOLETE /* *INDENT-ON* */ |
| 105 | // OBSOLETE |
| 106 | // OBSOLETE |
| 107 | // OBSOLETE |
| 108 | // OBSOLETE |
| 109 | // OBSOLETE #define MY_FRAME_IN_SP 0x1 |
| 110 | // OBSOLETE #define MY_FRAME_IN_FP 0x2 |
| 111 | // OBSOLETE #define CALLER_A2_IN_A0 0x4 |
| 112 | // OBSOLETE #define NO_MORE_FRAMES 0x8 |
| 113 | // OBSOLETE |
| 114 | // OBSOLETE static CORE_ADDR |
| 115 | // OBSOLETE mn10200_analyze_prologue (struct frame_info *fi, CORE_ADDR pc) |
| 116 | // OBSOLETE { |
| 117 | // OBSOLETE CORE_ADDR func_addr, func_end, addr, stop; |
| 118 | // OBSOLETE CORE_ADDR stack_size = 0; |
| 119 | // OBSOLETE unsigned char buf[4]; |
| 120 | // OBSOLETE int status; |
| 121 | // OBSOLETE char *name; |
| 122 | // OBSOLETE int out_of_line_prologue = 0; |
| 123 | // OBSOLETE |
| 124 | // OBSOLETE /* Use the PC in the frame if it's provided to look up the |
| 125 | // OBSOLETE start of this function. */ |
| 126 | // OBSOLETE pc = (fi ? get_frame_pc (fi) : pc); |
| 127 | // OBSOLETE |
| 128 | // OBSOLETE /* Find the start of this function. */ |
| 129 | // OBSOLETE status = find_pc_partial_function (pc, &name, &func_addr, &func_end); |
| 130 | // OBSOLETE |
| 131 | // OBSOLETE /* Do nothing if we couldn't find the start of this function or if we're |
| 132 | // OBSOLETE stopped at the first instruction in the prologue. */ |
| 133 | // OBSOLETE if (status == 0) |
| 134 | // OBSOLETE return pc; |
| 135 | // OBSOLETE |
| 136 | // OBSOLETE /* If we're in start, then give up. */ |
| 137 | // OBSOLETE if (strcmp (name, "start") == 0) |
| 138 | // OBSOLETE { |
| 139 | // OBSOLETE if (fi) |
| 140 | // OBSOLETE fi->status = NO_MORE_FRAMES; |
| 141 | // OBSOLETE return pc; |
| 142 | // OBSOLETE } |
| 143 | // OBSOLETE |
| 144 | // OBSOLETE /* At the start of a function our frame is in the stack pointer. */ |
| 145 | // OBSOLETE if (fi) |
| 146 | // OBSOLETE fi->status = MY_FRAME_IN_SP; |
| 147 | // OBSOLETE |
| 148 | // OBSOLETE /* If we're physically on an RTS instruction, then our frame has already |
| 149 | // OBSOLETE been deallocated. |
| 150 | // OBSOLETE |
| 151 | // OBSOLETE fi->frame is bogus, we need to fix it. */ |
| 152 | // OBSOLETE if (fi && get_frame_pc (fi) + 1 == func_end) |
| 153 | // OBSOLETE { |
| 154 | // OBSOLETE status = target_read_memory (get_frame_pc (fi), buf, 1); |
| 155 | // OBSOLETE if (status != 0) |
| 156 | // OBSOLETE { |
| 157 | // OBSOLETE if (get_next_frame (fi) == NULL) |
| 158 | // OBSOLETE deprecated_update_frame_base_hack (fi, read_sp ()); |
| 159 | // OBSOLETE return get_frame_pc (fi); |
| 160 | // OBSOLETE } |
| 161 | // OBSOLETE |
| 162 | // OBSOLETE if (buf[0] == 0xfe) |
| 163 | // OBSOLETE { |
| 164 | // OBSOLETE if (get_next_frame (fi) == NULL) |
| 165 | // OBSOLETE deprecated_update_frame_base_hack (fi, read_sp ()); |
| 166 | // OBSOLETE return get_frame_pc (fi); |
| 167 | // OBSOLETE } |
| 168 | // OBSOLETE } |
| 169 | // OBSOLETE |
| 170 | // OBSOLETE /* Similarly if we're stopped on the first insn of a prologue as our |
| 171 | // OBSOLETE frame hasn't been allocated yet. */ |
| 172 | // OBSOLETE if (fi && get_frame_pc (fi) == func_addr) |
| 173 | // OBSOLETE { |
| 174 | // OBSOLETE if (get_next_frame (fi) == NULL) |
| 175 | // OBSOLETE deprecated_update_frame_base_hack (fi, read_sp ()); |
| 176 | // OBSOLETE return get_frame_pc (fi); |
| 177 | // OBSOLETE } |
| 178 | // OBSOLETE |
| 179 | // OBSOLETE /* Figure out where to stop scanning. */ |
| 180 | // OBSOLETE stop = fi ? get_frame_pc (fi) : func_end; |
| 181 | // OBSOLETE |
| 182 | // OBSOLETE /* Don't walk off the end of the function. */ |
| 183 | // OBSOLETE stop = stop > func_end ? func_end : stop; |
| 184 | // OBSOLETE |
| 185 | // OBSOLETE /* Start scanning on the first instruction of this function. */ |
| 186 | // OBSOLETE addr = func_addr; |
| 187 | // OBSOLETE |
| 188 | // OBSOLETE status = target_read_memory (addr, buf, 2); |
| 189 | // OBSOLETE if (status != 0) |
| 190 | // OBSOLETE { |
| 191 | // OBSOLETE if (fi && get_next_frame (fi) == NULL && fi->status & MY_FRAME_IN_SP) |
| 192 | // OBSOLETE deprecated_update_frame_base_hack (fi, read_sp ()); |
| 193 | // OBSOLETE return addr; |
| 194 | // OBSOLETE } |
| 195 | // OBSOLETE |
| 196 | // OBSOLETE /* First see if this insn sets the stack pointer; if so, it's something |
| 197 | // OBSOLETE we won't understand, so quit now. */ |
| 198 | // OBSOLETE if (buf[0] == 0xdf |
| 199 | // OBSOLETE || (buf[0] == 0xf4 && buf[1] == 0x77)) |
| 200 | // OBSOLETE { |
| 201 | // OBSOLETE if (fi) |
| 202 | // OBSOLETE fi->status = NO_MORE_FRAMES; |
| 203 | // OBSOLETE return addr; |
| 204 | // OBSOLETE } |
| 205 | // OBSOLETE |
| 206 | // OBSOLETE /* Now see if we have a frame pointer. |
| 207 | // OBSOLETE |
| 208 | // OBSOLETE Search for mov a2,a0 (0xf278) |
| 209 | // OBSOLETE then mov a3,a2 (0xf27e). */ |
| 210 | // OBSOLETE |
| 211 | // OBSOLETE if (buf[0] == 0xf2 && buf[1] == 0x78) |
| 212 | // OBSOLETE { |
| 213 | // OBSOLETE /* Our caller's $a2 will be found in $a0 now. Note it for |
| 214 | // OBSOLETE our callers. */ |
| 215 | // OBSOLETE if (fi) |
| 216 | // OBSOLETE fi->status |= CALLER_A2_IN_A0; |
| 217 | // OBSOLETE addr += 2; |
| 218 | // OBSOLETE if (addr >= stop) |
| 219 | // OBSOLETE { |
| 220 | // OBSOLETE /* We still haven't allocated our local stack. Handle this |
| 221 | // OBSOLETE as if we stopped on the first or last insn of a function. */ |
| 222 | // OBSOLETE if (fi && get_next_frame (fi) == NULL) |
| 223 | // OBSOLETE deprecated_update_frame_base_hack (fi, read_sp ()); |
| 224 | // OBSOLETE return addr; |
| 225 | // OBSOLETE } |
| 226 | // OBSOLETE |
| 227 | // OBSOLETE status = target_read_memory (addr, buf, 2); |
| 228 | // OBSOLETE if (status != 0) |
| 229 | // OBSOLETE { |
| 230 | // OBSOLETE if (fi && get_next_frame (fi) == NULL) |
| 231 | // OBSOLETE deprecated_update_frame_base_hack (fi, read_sp ()); |
| 232 | // OBSOLETE return addr; |
| 233 | // OBSOLETE } |
| 234 | // OBSOLETE if (buf[0] == 0xf2 && buf[1] == 0x7e) |
| 235 | // OBSOLETE { |
| 236 | // OBSOLETE addr += 2; |
| 237 | // OBSOLETE |
| 238 | // OBSOLETE /* Our frame pointer is valid now. */ |
| 239 | // OBSOLETE if (fi) |
| 240 | // OBSOLETE { |
| 241 | // OBSOLETE fi->status |= MY_FRAME_IN_FP; |
| 242 | // OBSOLETE fi->status &= ~MY_FRAME_IN_SP; |
| 243 | // OBSOLETE } |
| 244 | // OBSOLETE if (addr >= stop) |
| 245 | // OBSOLETE return addr; |
| 246 | // OBSOLETE } |
| 247 | // OBSOLETE else |
| 248 | // OBSOLETE { |
| 249 | // OBSOLETE if (fi && get_next_frame (fi) == NULL) |
| 250 | // OBSOLETE deprecated_update_frame_base_hack (fi, read_sp ()); |
| 251 | // OBSOLETE return addr; |
| 252 | // OBSOLETE } |
| 253 | // OBSOLETE } |
| 254 | // OBSOLETE |
| 255 | // OBSOLETE /* Next we should allocate the local frame. |
| 256 | // OBSOLETE |
| 257 | // OBSOLETE Search for add imm8,a3 (0xd3XX) |
| 258 | // OBSOLETE or add imm16,a3 (0xf70bXXXX) |
| 259 | // OBSOLETE or add imm24,a3 (0xf467XXXXXX). |
| 260 | // OBSOLETE |
| 261 | // OBSOLETE If none of the above was found, then this prologue has |
| 262 | // OBSOLETE no stack, and therefore can't have any register saves, |
| 263 | // OBSOLETE so quit now. */ |
| 264 | // OBSOLETE status = target_read_memory (addr, buf, 2); |
| 265 | // OBSOLETE if (status != 0) |
| 266 | // OBSOLETE { |
| 267 | // OBSOLETE if (fi && get_next_frame (fi) == NULL && (fi->status & MY_FRAME_IN_SP)) |
| 268 | // OBSOLETE deprecated_update_frame_base_hack (fi, read_sp ()); |
| 269 | // OBSOLETE return addr; |
| 270 | // OBSOLETE } |
| 271 | // OBSOLETE if (buf[0] == 0xd3) |
| 272 | // OBSOLETE { |
| 273 | // OBSOLETE stack_size = extract_signed_integer (&buf[1], 1); |
| 274 | // OBSOLETE if (fi) |
| 275 | // OBSOLETE fi->stack_size = stack_size; |
| 276 | // OBSOLETE addr += 2; |
| 277 | // OBSOLETE if (addr >= stop) |
| 278 | // OBSOLETE { |
| 279 | // OBSOLETE if (fi && get_next_frame (fi) == NULL && (fi->status & MY_FRAME_IN_SP)) |
| 280 | // OBSOLETE deprecated_update_frame_base_hack (fi, read_sp () - stack_size); |
| 281 | // OBSOLETE return addr; |
| 282 | // OBSOLETE } |
| 283 | // OBSOLETE } |
| 284 | // OBSOLETE else if (buf[0] == 0xf7 && buf[1] == 0x0b) |
| 285 | // OBSOLETE { |
| 286 | // OBSOLETE status = target_read_memory (addr + 2, buf, 2); |
| 287 | // OBSOLETE if (status != 0) |
| 288 | // OBSOLETE { |
| 289 | // OBSOLETE if (fi && get_next_frame (fi) == NULL && (fi->status & MY_FRAME_IN_SP)) |
| 290 | // OBSOLETE deprecated_update_frame_base_hack (fi, read_sp ()); |
| 291 | // OBSOLETE return addr; |
| 292 | // OBSOLETE } |
| 293 | // OBSOLETE stack_size = extract_signed_integer (buf, 2); |
| 294 | // OBSOLETE if (fi) |
| 295 | // OBSOLETE fi->stack_size = stack_size; |
| 296 | // OBSOLETE addr += 4; |
| 297 | // OBSOLETE if (addr >= stop) |
| 298 | // OBSOLETE { |
| 299 | // OBSOLETE if (fi && get_next_frame (fi) == NULL && (fi->status & MY_FRAME_IN_SP)) |
| 300 | // OBSOLETE deprecated_update_frame_base_hack (fi, read_sp () - stack_size); |
| 301 | // OBSOLETE return addr; |
| 302 | // OBSOLETE } |
| 303 | // OBSOLETE } |
| 304 | // OBSOLETE else if (buf[0] == 0xf4 && buf[1] == 0x67) |
| 305 | // OBSOLETE { |
| 306 | // OBSOLETE status = target_read_memory (addr + 2, buf, 3); |
| 307 | // OBSOLETE if (status != 0) |
| 308 | // OBSOLETE { |
| 309 | // OBSOLETE if (fi && get_next_frame (fi) == NULL && (fi->status & MY_FRAME_IN_SP)) |
| 310 | // OBSOLETE deprecated_update_frame_base_hack (fi, read_sp ()); |
| 311 | // OBSOLETE return addr; |
| 312 | // OBSOLETE } |
| 313 | // OBSOLETE stack_size = extract_signed_integer (buf, 3); |
| 314 | // OBSOLETE if (fi) |
| 315 | // OBSOLETE fi->stack_size = stack_size; |
| 316 | // OBSOLETE addr += 5; |
| 317 | // OBSOLETE if (addr >= stop) |
| 318 | // OBSOLETE { |
| 319 | // OBSOLETE if (fi && get_next_frame (fi) == NULL && (fi->status & MY_FRAME_IN_SP)) |
| 320 | // OBSOLETE deprecated_update_frame_base_hack (fi, read_sp () - stack_size); |
| 321 | // OBSOLETE return addr; |
| 322 | // OBSOLETE } |
| 323 | // OBSOLETE } |
| 324 | // OBSOLETE |
| 325 | // OBSOLETE /* Now see if we have a call to __prologue for an out of line |
| 326 | // OBSOLETE prologue. */ |
| 327 | // OBSOLETE status = target_read_memory (addr, buf, 2); |
| 328 | // OBSOLETE if (status != 0) |
| 329 | // OBSOLETE return addr; |
| 330 | // OBSOLETE |
| 331 | // OBSOLETE /* First check for 16bit pc-relative call to __prologue. */ |
| 332 | // OBSOLETE if (buf[0] == 0xfd) |
| 333 | // OBSOLETE { |
| 334 | // OBSOLETE CORE_ADDR temp; |
| 335 | // OBSOLETE status = target_read_memory (addr + 1, buf, 2); |
| 336 | // OBSOLETE if (status != 0) |
| 337 | // OBSOLETE { |
| 338 | // OBSOLETE if (fi && get_next_frame (fi) == NULL && (fi->status & MY_FRAME_IN_SP)) |
| 339 | // OBSOLETE deprecated_update_frame_base_hack (fi, read_sp ()); |
| 340 | // OBSOLETE return addr; |
| 341 | // OBSOLETE } |
| 342 | // OBSOLETE |
| 343 | // OBSOLETE /* Get the PC this instruction will branch to. */ |
| 344 | // OBSOLETE temp = (extract_signed_integer (buf, 2) + addr + 3) & 0xffffff; |
| 345 | // OBSOLETE |
| 346 | // OBSOLETE /* Get the name of the function at the target address. */ |
| 347 | // OBSOLETE status = find_pc_partial_function (temp, &name, NULL, NULL); |
| 348 | // OBSOLETE if (status == 0) |
| 349 | // OBSOLETE { |
| 350 | // OBSOLETE if (fi && get_next_frame (fi) == NULL && (fi->status & MY_FRAME_IN_SP)) |
| 351 | // OBSOLETE deprecated_update_frame_base_hack (fi, read_sp ()); |
| 352 | // OBSOLETE return addr; |
| 353 | // OBSOLETE } |
| 354 | // OBSOLETE |
| 355 | // OBSOLETE /* Note if it is an out of line prologue. */ |
| 356 | // OBSOLETE out_of_line_prologue = (strcmp (name, "__prologue") == 0); |
| 357 | // OBSOLETE |
| 358 | // OBSOLETE /* This sucks up 3 bytes of instruction space. */ |
| 359 | // OBSOLETE if (out_of_line_prologue) |
| 360 | // OBSOLETE addr += 3; |
| 361 | // OBSOLETE |
| 362 | // OBSOLETE if (addr >= stop) |
| 363 | // OBSOLETE { |
| 364 | // OBSOLETE if (fi && get_next_frame (fi) == NULL) |
| 365 | // OBSOLETE { |
| 366 | // OBSOLETE fi->stack_size -= 16; |
| 367 | // OBSOLETE deprecated_update_frame_base_hack (fi, read_sp () - fi->stack_size); |
| 368 | // OBSOLETE } |
| 369 | // OBSOLETE return addr; |
| 370 | // OBSOLETE } |
| 371 | // OBSOLETE } |
| 372 | // OBSOLETE /* Now check for the 24bit pc-relative call to __prologue. */ |
| 373 | // OBSOLETE else if (buf[0] == 0xf4 && buf[1] == 0xe1) |
| 374 | // OBSOLETE { |
| 375 | // OBSOLETE CORE_ADDR temp; |
| 376 | // OBSOLETE status = target_read_memory (addr + 2, buf, 3); |
| 377 | // OBSOLETE if (status != 0) |
| 378 | // OBSOLETE { |
| 379 | // OBSOLETE if (fi && get_next_frame (fi) == NULL && (fi->status & MY_FRAME_IN_SP)) |
| 380 | // OBSOLETE deprecated_update_frame_base_hack (fi, read_sp ()); |
| 381 | // OBSOLETE return addr; |
| 382 | // OBSOLETE } |
| 383 | // OBSOLETE |
| 384 | // OBSOLETE /* Get the PC this instruction will branch to. */ |
| 385 | // OBSOLETE temp = (extract_signed_integer (buf, 3) + addr + 5) & 0xffffff; |
| 386 | // OBSOLETE |
| 387 | // OBSOLETE /* Get the name of the function at the target address. */ |
| 388 | // OBSOLETE status = find_pc_partial_function (temp, &name, NULL, NULL); |
| 389 | // OBSOLETE if (status == 0) |
| 390 | // OBSOLETE { |
| 391 | // OBSOLETE if (fi && get_next_frame (fi) == NULL && (fi->status & MY_FRAME_IN_SP)) |
| 392 | // OBSOLETE deprecated_update_frame_base_hack (fi, read_sp ()); |
| 393 | // OBSOLETE return addr; |
| 394 | // OBSOLETE } |
| 395 | // OBSOLETE |
| 396 | // OBSOLETE /* Note if it is an out of line prologue. */ |
| 397 | // OBSOLETE out_of_line_prologue = (strcmp (name, "__prologue") == 0); |
| 398 | // OBSOLETE |
| 399 | // OBSOLETE /* This sucks up 5 bytes of instruction space. */ |
| 400 | // OBSOLETE if (out_of_line_prologue) |
| 401 | // OBSOLETE addr += 5; |
| 402 | // OBSOLETE |
| 403 | // OBSOLETE if (addr >= stop) |
| 404 | // OBSOLETE { |
| 405 | // OBSOLETE if (fi && get_next_frame (fi) == NULL && (fi->status & MY_FRAME_IN_SP)) |
| 406 | // OBSOLETE { |
| 407 | // OBSOLETE fi->stack_size -= 16; |
| 408 | // OBSOLETE deprecated_update_frame_base_hack (fi, read_sp () - fi->stack_size); |
| 409 | // OBSOLETE } |
| 410 | // OBSOLETE return addr; |
| 411 | // OBSOLETE } |
| 412 | // OBSOLETE } |
| 413 | // OBSOLETE |
| 414 | // OBSOLETE /* Now actually handle the out of line prologue. */ |
| 415 | // OBSOLETE if (out_of_line_prologue) |
| 416 | // OBSOLETE { |
| 417 | // OBSOLETE int outgoing_args_size = 0; |
| 418 | // OBSOLETE |
| 419 | // OBSOLETE /* First adjust the stack size for this function. The out of |
| 420 | // OBSOLETE line prologue saves 4 registers (16bytes of data). */ |
| 421 | // OBSOLETE if (fi) |
| 422 | // OBSOLETE fi->stack_size -= 16; |
| 423 | // OBSOLETE |
| 424 | // OBSOLETE /* Update fi->frame if necessary. */ |
| 425 | // OBSOLETE if (fi && get_next_frame (fi) == NULL) |
| 426 | // OBSOLETE deprecated_update_frame_base_hack (fi, read_sp () - fi->stack_size); |
| 427 | // OBSOLETE |
| 428 | // OBSOLETE /* After the out of line prologue, there may be another |
| 429 | // OBSOLETE stack adjustment for the outgoing arguments. |
| 430 | // OBSOLETE |
| 431 | // OBSOLETE Search for add imm8,a3 (0xd3XX) |
| 432 | // OBSOLETE or add imm16,a3 (0xf70bXXXX) |
| 433 | // OBSOLETE or add imm24,a3 (0xf467XXXXXX). */ |
| 434 | // OBSOLETE |
| 435 | // OBSOLETE status = target_read_memory (addr, buf, 2); |
| 436 | // OBSOLETE if (status != 0) |
| 437 | // OBSOLETE { |
| 438 | // OBSOLETE if (fi) |
| 439 | // OBSOLETE { |
| 440 | // OBSOLETE fi->fsr.regs[2] = get_frame_base (fi) + fi->stack_size + 4; |
| 441 | // OBSOLETE fi->fsr.regs[3] = get_frame_base (fi) + fi->stack_size + 8; |
| 442 | // OBSOLETE fi->fsr.regs[5] = get_frame_base (fi) + fi->stack_size + 12; |
| 443 | // OBSOLETE fi->fsr.regs[6] = get_frame_base (fi) + fi->stack_size + 16; |
| 444 | // OBSOLETE } |
| 445 | // OBSOLETE return addr; |
| 446 | // OBSOLETE } |
| 447 | // OBSOLETE |
| 448 | // OBSOLETE if (buf[0] == 0xd3) |
| 449 | // OBSOLETE { |
| 450 | // OBSOLETE outgoing_args_size = extract_signed_integer (&buf[1], 1); |
| 451 | // OBSOLETE addr += 2; |
| 452 | // OBSOLETE } |
| 453 | // OBSOLETE else if (buf[0] == 0xf7 && buf[1] == 0x0b) |
| 454 | // OBSOLETE { |
| 455 | // OBSOLETE status = target_read_memory (addr + 2, buf, 2); |
| 456 | // OBSOLETE if (status != 0) |
| 457 | // OBSOLETE { |
| 458 | // OBSOLETE if (fi) |
| 459 | // OBSOLETE { |
| 460 | // OBSOLETE fi->fsr.regs[2] = get_frame_base (fi) + fi->stack_size + 4; |
| 461 | // OBSOLETE fi->fsr.regs[3] = get_frame_base (fi) + fi->stack_size + 8; |
| 462 | // OBSOLETE fi->fsr.regs[5] = get_frame_base (fi) + fi->stack_size + 12; |
| 463 | // OBSOLETE fi->fsr.regs[6] = get_frame_base (fi) + fi->stack_size + 16; |
| 464 | // OBSOLETE } |
| 465 | // OBSOLETE return addr; |
| 466 | // OBSOLETE } |
| 467 | // OBSOLETE outgoing_args_size = extract_signed_integer (buf, 2); |
| 468 | // OBSOLETE addr += 4; |
| 469 | // OBSOLETE } |
| 470 | // OBSOLETE else if (buf[0] == 0xf4 && buf[1] == 0x67) |
| 471 | // OBSOLETE { |
| 472 | // OBSOLETE status = target_read_memory (addr + 2, buf, 3); |
| 473 | // OBSOLETE if (status != 0) |
| 474 | // OBSOLETE { |
| 475 | // OBSOLETE if (fi && get_next_frame (fi) == NULL) |
| 476 | // OBSOLETE { |
| 477 | // OBSOLETE fi->fsr.regs[2] = get_frame_base (fi) + fi->stack_size + 4; |
| 478 | // OBSOLETE fi->fsr.regs[3] = get_frame_base (fi) + fi->stack_size + 8; |
| 479 | // OBSOLETE fi->fsr.regs[5] = get_frame_base (fi) + fi->stack_size + 12; |
| 480 | // OBSOLETE fi->fsr.regs[6] = get_frame_base (fi) + fi->stack_size + 16; |
| 481 | // OBSOLETE } |
| 482 | // OBSOLETE return addr; |
| 483 | // OBSOLETE } |
| 484 | // OBSOLETE outgoing_args_size = extract_signed_integer (buf, 3); |
| 485 | // OBSOLETE addr += 5; |
| 486 | // OBSOLETE } |
| 487 | // OBSOLETE else |
| 488 | // OBSOLETE outgoing_args_size = 0; |
| 489 | // OBSOLETE |
| 490 | // OBSOLETE /* Now that we know the size of the outgoing arguments, fix |
| 491 | // OBSOLETE fi->frame again if this is the innermost frame. */ |
| 492 | // OBSOLETE if (fi && get_next_frame (fi) == NULL) |
| 493 | // OBSOLETE deprecated_update_frame_base_hack (fi, get_frame_base (fi) - outgoing_args_size); |
| 494 | // OBSOLETE |
| 495 | // OBSOLETE /* Note the register save information and update the stack |
| 496 | // OBSOLETE size for this frame too. */ |
| 497 | // OBSOLETE if (fi) |
| 498 | // OBSOLETE { |
| 499 | // OBSOLETE fi->fsr.regs[2] = get_frame_base (fi) + fi->stack_size + 4; |
| 500 | // OBSOLETE fi->fsr.regs[3] = get_frame_base (fi) + fi->stack_size + 8; |
| 501 | // OBSOLETE fi->fsr.regs[5] = get_frame_base (fi) + fi->stack_size + 12; |
| 502 | // OBSOLETE fi->fsr.regs[6] = get_frame_base (fi) + fi->stack_size + 16; |
| 503 | // OBSOLETE fi->stack_size += outgoing_args_size; |
| 504 | // OBSOLETE } |
| 505 | // OBSOLETE /* There can be no more prologue insns, so return now. */ |
| 506 | // OBSOLETE return addr; |
| 507 | // OBSOLETE } |
| 508 | // OBSOLETE |
| 509 | // OBSOLETE /* At this point fi->frame needs to be correct. |
| 510 | // OBSOLETE |
| 511 | // OBSOLETE If MY_FRAME_IN_SP is set and we're the innermost frame, then we |
| 512 | // OBSOLETE need to fix fi->frame so that backtracing, find_frame_saved_regs, |
| 513 | // OBSOLETE etc work correctly. */ |
| 514 | // OBSOLETE if (fi && get_next_frame (fi) == NULL && (fi->status & MY_FRAME_IN_SP) != 0) |
| 515 | // OBSOLETE deprecated_update_frame_base_hack (fi, read_sp () - fi->stack_size); |
| 516 | // OBSOLETE |
| 517 | // OBSOLETE /* And last we have the register saves. These are relatively |
| 518 | // OBSOLETE simple because they're physically done off the stack pointer, |
| 519 | // OBSOLETE and thus the number of different instructions we need to |
| 520 | // OBSOLETE check is greatly reduced because we know the displacements |
| 521 | // OBSOLETE will be small. |
| 522 | // OBSOLETE |
| 523 | // OBSOLETE Search for movx d2,(X,a3) (0xf55eXX) |
| 524 | // OBSOLETE then movx d3,(X,a3) (0xf55fXX) |
| 525 | // OBSOLETE then mov a1,(X,a3) (0x5dXX) No frame pointer case |
| 526 | // OBSOLETE then mov a2,(X,a3) (0x5eXX) No frame pointer case |
| 527 | // OBSOLETE or mov a0,(X,a3) (0x5cXX) Frame pointer case. */ |
| 528 | // OBSOLETE |
| 529 | // OBSOLETE status = target_read_memory (addr, buf, 2); |
| 530 | // OBSOLETE if (status != 0) |
| 531 | // OBSOLETE return addr; |
| 532 | // OBSOLETE if (buf[0] == 0xf5 && buf[1] == 0x5e) |
| 533 | // OBSOLETE { |
| 534 | // OBSOLETE if (fi) |
| 535 | // OBSOLETE { |
| 536 | // OBSOLETE status = target_read_memory (addr + 2, buf, 1); |
| 537 | // OBSOLETE if (status != 0) |
| 538 | // OBSOLETE return addr; |
| 539 | // OBSOLETE fi->fsr.regs[2] = (get_frame_base (fi) + stack_size |
| 540 | // OBSOLETE + extract_signed_integer (buf, 1)); |
| 541 | // OBSOLETE } |
| 542 | // OBSOLETE addr += 3; |
| 543 | // OBSOLETE if (addr >= stop) |
| 544 | // OBSOLETE return addr; |
| 545 | // OBSOLETE status = target_read_memory (addr, buf, 2); |
| 546 | // OBSOLETE if (status != 0) |
| 547 | // OBSOLETE return addr; |
| 548 | // OBSOLETE } |
| 549 | // OBSOLETE if (buf[0] == 0xf5 && buf[1] == 0x5f) |
| 550 | // OBSOLETE { |
| 551 | // OBSOLETE if (fi) |
| 552 | // OBSOLETE { |
| 553 | // OBSOLETE status = target_read_memory (addr + 2, buf, 1); |
| 554 | // OBSOLETE if (status != 0) |
| 555 | // OBSOLETE return addr; |
| 556 | // OBSOLETE fi->fsr.regs[3] = (get_frame_base (fi) + stack_size |
| 557 | // OBSOLETE + extract_signed_integer (buf, 1)); |
| 558 | // OBSOLETE } |
| 559 | // OBSOLETE addr += 3; |
| 560 | // OBSOLETE if (addr >= stop) |
| 561 | // OBSOLETE return addr; |
| 562 | // OBSOLETE status = target_read_memory (addr, buf, 2); |
| 563 | // OBSOLETE if (status != 0) |
| 564 | // OBSOLETE return addr; |
| 565 | // OBSOLETE } |
| 566 | // OBSOLETE if (buf[0] == 0x5d) |
| 567 | // OBSOLETE { |
| 568 | // OBSOLETE if (fi) |
| 569 | // OBSOLETE { |
| 570 | // OBSOLETE status = target_read_memory (addr + 1, buf, 1); |
| 571 | // OBSOLETE if (status != 0) |
| 572 | // OBSOLETE return addr; |
| 573 | // OBSOLETE fi->fsr.regs[5] = (get_frame_base (fi) + stack_size |
| 574 | // OBSOLETE + extract_signed_integer (buf, 1)); |
| 575 | // OBSOLETE } |
| 576 | // OBSOLETE addr += 2; |
| 577 | // OBSOLETE if (addr >= stop) |
| 578 | // OBSOLETE return addr; |
| 579 | // OBSOLETE status = target_read_memory (addr, buf, 2); |
| 580 | // OBSOLETE if (status != 0) |
| 581 | // OBSOLETE return addr; |
| 582 | // OBSOLETE } |
| 583 | // OBSOLETE if (buf[0] == 0x5e || buf[0] == 0x5c) |
| 584 | // OBSOLETE { |
| 585 | // OBSOLETE if (fi) |
| 586 | // OBSOLETE { |
| 587 | // OBSOLETE status = target_read_memory (addr + 1, buf, 1); |
| 588 | // OBSOLETE if (status != 0) |
| 589 | // OBSOLETE return addr; |
| 590 | // OBSOLETE fi->fsr.regs[6] = (get_frame_base (fi) + stack_size |
| 591 | // OBSOLETE + extract_signed_integer (buf, 1)); |
| 592 | // OBSOLETE fi->status &= ~CALLER_A2_IN_A0; |
| 593 | // OBSOLETE } |
| 594 | // OBSOLETE addr += 2; |
| 595 | // OBSOLETE if (addr >= stop) |
| 596 | // OBSOLETE return addr; |
| 597 | // OBSOLETE return addr; |
| 598 | // OBSOLETE } |
| 599 | // OBSOLETE return addr; |
| 600 | // OBSOLETE } |
| 601 | // OBSOLETE |
| 602 | // OBSOLETE /* Function: frame_chain |
| 603 | // OBSOLETE Figure out and return the caller's frame pointer given current |
| 604 | // OBSOLETE frame_info struct. |
| 605 | // OBSOLETE |
| 606 | // OBSOLETE We don't handle dummy frames yet but we would probably just return the |
| 607 | // OBSOLETE stack pointer that was in use at the time the function call was made? */ |
| 608 | // OBSOLETE |
| 609 | // OBSOLETE CORE_ADDR |
| 610 | // OBSOLETE mn10200_frame_chain (struct frame_info *fi) |
| 611 | // OBSOLETE { |
| 612 | // OBSOLETE struct frame_info *dummy_frame = deprecated_frame_xmalloc (); |
| 613 | // OBSOLETE struct cleanup *old_chain = make_cleanup (xfree, dummy_frame); |
| 614 | // OBSOLETE CORE_ADDR ret; |
| 615 | // OBSOLETE |
| 616 | // OBSOLETE /* Walk through the prologue to determine the stack size, |
| 617 | // OBSOLETE location of saved registers, end of the prologue, etc. */ |
| 618 | // OBSOLETE if (fi->status == 0) |
| 619 | // OBSOLETE mn10200_analyze_prologue (fi, (CORE_ADDR) 0); |
| 620 | // OBSOLETE |
| 621 | // OBSOLETE /* Quit now if mn10200_analyze_prologue set NO_MORE_FRAMES. */ |
| 622 | // OBSOLETE if (fi->status & NO_MORE_FRAMES) |
| 623 | // OBSOLETE return 0; |
| 624 | // OBSOLETE |
| 625 | // OBSOLETE /* Now that we've analyzed our prologue, determine the frame |
| 626 | // OBSOLETE pointer for our caller. |
| 627 | // OBSOLETE |
| 628 | // OBSOLETE If our caller has a frame pointer, then we need to |
| 629 | // OBSOLETE find the entry value of $a2 to our function. |
| 630 | // OBSOLETE |
| 631 | // OBSOLETE If CALLER_A2_IN_A0, then the chain is in $a0. |
| 632 | // OBSOLETE |
| 633 | // OBSOLETE If fsr.regs[6] is nonzero, then it's at the memory |
| 634 | // OBSOLETE location pointed to by fsr.regs[6]. |
| 635 | // OBSOLETE |
| 636 | // OBSOLETE Else it's still in $a2. |
| 637 | // OBSOLETE |
| 638 | // OBSOLETE If our caller does not have a frame pointer, then his |
| 639 | // OBSOLETE frame base is fi->frame + -caller's stack size + 4. */ |
| 640 | // OBSOLETE |
| 641 | // OBSOLETE /* The easiest way to get that info is to analyze our caller's frame. |
| 642 | // OBSOLETE |
| 643 | // OBSOLETE So we set up a dummy frame and call mn10200_analyze_prologue to |
| 644 | // OBSOLETE find stuff for us. */ |
| 645 | // OBSOLETE deprecated_update_frame_pc_hack (dummy_frame, FRAME_SAVED_PC (fi)); |
| 646 | // OBSOLETE deprecated_update_frame_base_hack (dummy_frame, get_frame_base (fi)); |
| 647 | // OBSOLETE memset (dummy_frame->fsr.regs, '\000', sizeof dummy_frame->fsr.regs); |
| 648 | // OBSOLETE dummy_frame->status = 0; |
| 649 | // OBSOLETE dummy_frame->stack_size = 0; |
| 650 | // OBSOLETE mn10200_analyze_prologue (dummy_frame, 0); |
| 651 | // OBSOLETE |
| 652 | // OBSOLETE if (dummy_frame->status & MY_FRAME_IN_FP) |
| 653 | // OBSOLETE { |
| 654 | // OBSOLETE /* Our caller has a frame pointer. So find the frame in $a2, $a0, |
| 655 | // OBSOLETE or in the stack. */ |
| 656 | // OBSOLETE if (fi->fsr.regs[6]) |
| 657 | // OBSOLETE ret = (read_memory_integer (fi->fsr.regs[FP_REGNUM], REGISTER_SIZE) |
| 658 | // OBSOLETE & 0xffffff); |
| 659 | // OBSOLETE else if (fi->status & CALLER_A2_IN_A0) |
| 660 | // OBSOLETE ret = read_register (4); |
| 661 | // OBSOLETE else |
| 662 | // OBSOLETE ret = read_register (FP_REGNUM); |
| 663 | // OBSOLETE } |
| 664 | // OBSOLETE else |
| 665 | // OBSOLETE { |
| 666 | // OBSOLETE /* Our caller does not have a frame pointer. So his frame starts |
| 667 | // OBSOLETE at the base of our frame (fi->frame) + <his size> + 4 (saved pc). */ |
| 668 | // OBSOLETE ret = get_frame_base (fi) + -dummy_frame->stack_size + 4; |
| 669 | // OBSOLETE } |
| 670 | // OBSOLETE do_cleanups (old_chain); |
| 671 | // OBSOLETE return ret; |
| 672 | // OBSOLETE } |
| 673 | // OBSOLETE |
| 674 | // OBSOLETE /* Function: skip_prologue |
| 675 | // OBSOLETE Return the address of the first inst past the prologue of the function. */ |
| 676 | // OBSOLETE |
| 677 | // OBSOLETE CORE_ADDR |
| 678 | // OBSOLETE mn10200_skip_prologue (CORE_ADDR pc) |
| 679 | // OBSOLETE { |
| 680 | // OBSOLETE /* We used to check the debug symbols, but that can lose if |
| 681 | // OBSOLETE we have a null prologue. */ |
| 682 | // OBSOLETE return mn10200_analyze_prologue (NULL, pc); |
| 683 | // OBSOLETE } |
| 684 | // OBSOLETE |
| 685 | // OBSOLETE /* Function: pop_frame |
| 686 | // OBSOLETE This routine gets called when either the user uses the `return' |
| 687 | // OBSOLETE command, or the call dummy breakpoint gets hit. */ |
| 688 | // OBSOLETE |
| 689 | // OBSOLETE void |
| 690 | // OBSOLETE mn10200_pop_frame (struct frame_info *frame) |
| 691 | // OBSOLETE { |
| 692 | // OBSOLETE int regnum; |
| 693 | // OBSOLETE |
| 694 | // OBSOLETE if (DEPRECATED_PC_IN_CALL_DUMMY (get_frame_pc (frame), |
| 695 | // OBSOLETE get_frame_base (frame), |
| 696 | // OBSOLETE get_frame_base (frame))) |
| 697 | // OBSOLETE generic_pop_dummy_frame (); |
| 698 | // OBSOLETE else |
| 699 | // OBSOLETE { |
| 700 | // OBSOLETE write_register (PC_REGNUM, FRAME_SAVED_PC (frame)); |
| 701 | // OBSOLETE |
| 702 | // OBSOLETE /* Restore any saved registers. */ |
| 703 | // OBSOLETE for (regnum = 0; regnum < NUM_REGS; regnum++) |
| 704 | // OBSOLETE if (frame->fsr.regs[regnum] != 0) |
| 705 | // OBSOLETE { |
| 706 | // OBSOLETE ULONGEST value; |
| 707 | // OBSOLETE |
| 708 | // OBSOLETE value = read_memory_unsigned_integer (frame->fsr.regs[regnum], |
| 709 | // OBSOLETE REGISTER_RAW_SIZE (regnum)); |
| 710 | // OBSOLETE write_register (regnum, value); |
| 711 | // OBSOLETE } |
| 712 | // OBSOLETE |
| 713 | // OBSOLETE /* Actually cut back the stack. */ |
| 714 | // OBSOLETE write_register (SP_REGNUM, get_frame_base (frame)); |
| 715 | // OBSOLETE |
| 716 | // OBSOLETE /* Don't we need to set the PC?!? XXX FIXME. */ |
| 717 | // OBSOLETE } |
| 718 | // OBSOLETE |
| 719 | // OBSOLETE /* Throw away any cached frame information. */ |
| 720 | // OBSOLETE flush_cached_frames (); |
| 721 | // OBSOLETE } |
| 722 | // OBSOLETE |
| 723 | // OBSOLETE /* Function: push_arguments |
| 724 | // OBSOLETE Setup arguments for a call to the target. Arguments go in |
| 725 | // OBSOLETE order on the stack. */ |
| 726 | // OBSOLETE |
| 727 | // OBSOLETE CORE_ADDR |
| 728 | // OBSOLETE mn10200_push_arguments (int nargs, struct value **args, CORE_ADDR sp, |
| 729 | // OBSOLETE unsigned char struct_return, CORE_ADDR struct_addr) |
| 730 | // OBSOLETE { |
| 731 | // OBSOLETE int argnum = 0; |
| 732 | // OBSOLETE int len = 0; |
| 733 | // OBSOLETE int stack_offset = 0; |
| 734 | // OBSOLETE int regsused = struct_return ? 1 : 0; |
| 735 | // OBSOLETE |
| 736 | // OBSOLETE /* This should be a nop, but align the stack just in case something |
| 737 | // OBSOLETE went wrong. Stacks are two byte aligned on the mn10200. */ |
| 738 | // OBSOLETE sp &= ~1; |
| 739 | // OBSOLETE |
| 740 | // OBSOLETE /* Now make space on the stack for the args. |
| 741 | // OBSOLETE |
| 742 | // OBSOLETE XXX This doesn't appear to handle pass-by-invisible reference |
| 743 | // OBSOLETE arguments. */ |
| 744 | // OBSOLETE for (argnum = 0; argnum < nargs; argnum++) |
| 745 | // OBSOLETE { |
| 746 | // OBSOLETE int arg_length = (TYPE_LENGTH (VALUE_TYPE (args[argnum])) + 1) & ~1; |
| 747 | // OBSOLETE |
| 748 | // OBSOLETE /* If we've used all argument registers, then this argument is |
| 749 | // OBSOLETE pushed. */ |
| 750 | // OBSOLETE if (regsused >= 2 || arg_length > 4) |
| 751 | // OBSOLETE { |
| 752 | // OBSOLETE regsused = 2; |
| 753 | // OBSOLETE len += arg_length; |
| 754 | // OBSOLETE } |
| 755 | // OBSOLETE /* We know we've got some arg register space left. If this argument |
| 756 | // OBSOLETE will fit entirely in regs, then put it there. */ |
| 757 | // OBSOLETE else if (arg_length <= 2 |
| 758 | // OBSOLETE || TYPE_CODE (VALUE_TYPE (args[argnum])) == TYPE_CODE_PTR) |
| 759 | // OBSOLETE { |
| 760 | // OBSOLETE regsused++; |
| 761 | // OBSOLETE } |
| 762 | // OBSOLETE else if (regsused == 0) |
| 763 | // OBSOLETE { |
| 764 | // OBSOLETE regsused = 2; |
| 765 | // OBSOLETE } |
| 766 | // OBSOLETE else |
| 767 | // OBSOLETE { |
| 768 | // OBSOLETE regsused = 2; |
| 769 | // OBSOLETE len += arg_length; |
| 770 | // OBSOLETE } |
| 771 | // OBSOLETE } |
| 772 | // OBSOLETE |
| 773 | // OBSOLETE /* Allocate stack space. */ |
| 774 | // OBSOLETE sp -= len; |
| 775 | // OBSOLETE |
| 776 | // OBSOLETE regsused = struct_return ? 1 : 0; |
| 777 | // OBSOLETE /* Push all arguments onto the stack. */ |
| 778 | // OBSOLETE for (argnum = 0; argnum < nargs; argnum++) |
| 779 | // OBSOLETE { |
| 780 | // OBSOLETE int len; |
| 781 | // OBSOLETE char *val; |
| 782 | // OBSOLETE |
| 783 | // OBSOLETE /* XXX Check this. What about UNIONS? */ |
| 784 | // OBSOLETE if (TYPE_CODE (VALUE_TYPE (*args)) == TYPE_CODE_STRUCT |
| 785 | // OBSOLETE && TYPE_LENGTH (VALUE_TYPE (*args)) > 8) |
| 786 | // OBSOLETE { |
| 787 | // OBSOLETE /* XXX Wrong, we want a pointer to this argument. */ |
| 788 | // OBSOLETE len = TYPE_LENGTH (VALUE_TYPE (*args)); |
| 789 | // OBSOLETE val = (char *) VALUE_CONTENTS (*args); |
| 790 | // OBSOLETE } |
| 791 | // OBSOLETE else |
| 792 | // OBSOLETE { |
| 793 | // OBSOLETE len = TYPE_LENGTH (VALUE_TYPE (*args)); |
| 794 | // OBSOLETE val = (char *) VALUE_CONTENTS (*args); |
| 795 | // OBSOLETE } |
| 796 | // OBSOLETE |
| 797 | // OBSOLETE if (regsused < 2 |
| 798 | // OBSOLETE && (len <= 2 |
| 799 | // OBSOLETE || TYPE_CODE (VALUE_TYPE (*args)) == TYPE_CODE_PTR)) |
| 800 | // OBSOLETE { |
| 801 | // OBSOLETE write_register (regsused, extract_unsigned_integer (val, 4)); |
| 802 | // OBSOLETE regsused++; |
| 803 | // OBSOLETE } |
| 804 | // OBSOLETE else if (regsused == 0 && len == 4) |
| 805 | // OBSOLETE { |
| 806 | // OBSOLETE write_register (regsused, extract_unsigned_integer (val, 2)); |
| 807 | // OBSOLETE write_register (regsused + 1, extract_unsigned_integer (val + 2, 2)); |
| 808 | // OBSOLETE regsused = 2; |
| 809 | // OBSOLETE } |
| 810 | // OBSOLETE else |
| 811 | // OBSOLETE { |
| 812 | // OBSOLETE regsused = 2; |
| 813 | // OBSOLETE while (len > 0) |
| 814 | // OBSOLETE { |
| 815 | // OBSOLETE write_memory (sp + stack_offset, val, 2); |
| 816 | // OBSOLETE |
| 817 | // OBSOLETE len -= 2; |
| 818 | // OBSOLETE val += 2; |
| 819 | // OBSOLETE stack_offset += 2; |
| 820 | // OBSOLETE } |
| 821 | // OBSOLETE } |
| 822 | // OBSOLETE args++; |
| 823 | // OBSOLETE } |
| 824 | // OBSOLETE |
| 825 | // OBSOLETE return sp; |
| 826 | // OBSOLETE } |
| 827 | // OBSOLETE |
| 828 | // OBSOLETE /* Function: push_return_address (pc) |
| 829 | // OBSOLETE Set up the return address for the inferior function call. |
| 830 | // OBSOLETE Needed for targets where we don't actually execute a JSR/BSR instruction */ |
| 831 | // OBSOLETE |
| 832 | // OBSOLETE CORE_ADDR |
| 833 | // OBSOLETE mn10200_push_return_address (CORE_ADDR pc, CORE_ADDR sp) |
| 834 | // OBSOLETE { |
| 835 | // OBSOLETE unsigned char buf[4]; |
| 836 | // OBSOLETE |
| 837 | // OBSOLETE store_unsigned_integer (buf, 4, CALL_DUMMY_ADDRESS ()); |
| 838 | // OBSOLETE write_memory (sp - 4, buf, 4); |
| 839 | // OBSOLETE return sp - 4; |
| 840 | // OBSOLETE } |
| 841 | // OBSOLETE |
| 842 | // OBSOLETE /* Function: store_struct_return (addr,sp) |
| 843 | // OBSOLETE Store the structure value return address for an inferior function |
| 844 | // OBSOLETE call. */ |
| 845 | // OBSOLETE |
| 846 | // OBSOLETE CORE_ADDR |
| 847 | // OBSOLETE mn10200_store_struct_return (CORE_ADDR addr, CORE_ADDR sp) |
| 848 | // OBSOLETE { |
| 849 | // OBSOLETE /* The structure return address is passed as the first argument. */ |
| 850 | // OBSOLETE write_register (0, addr); |
| 851 | // OBSOLETE return sp; |
| 852 | // OBSOLETE } |
| 853 | // OBSOLETE |
| 854 | // OBSOLETE /* Function: frame_saved_pc |
| 855 | // OBSOLETE Find the caller of this frame. We do this by seeing if RP_REGNUM |
| 856 | // OBSOLETE is saved in the stack anywhere, otherwise we get it from the |
| 857 | // OBSOLETE registers. If the inner frame is a dummy frame, return its PC |
| 858 | // OBSOLETE instead of RP, because that's where "caller" of the dummy-frame |
| 859 | // OBSOLETE will be found. */ |
| 860 | // OBSOLETE |
| 861 | // OBSOLETE CORE_ADDR |
| 862 | // OBSOLETE mn10200_frame_saved_pc (struct frame_info *fi) |
| 863 | // OBSOLETE { |
| 864 | // OBSOLETE /* The saved PC will always be at the base of the current frame. */ |
| 865 | // OBSOLETE return (read_memory_integer (get_frame_base (fi), REGISTER_SIZE) & 0xffffff); |
| 866 | // OBSOLETE } |
| 867 | // OBSOLETE |
| 868 | // OBSOLETE /* Function: init_extra_frame_info |
| 869 | // OBSOLETE Setup the frame's frame pointer, pc, and frame addresses for saved |
| 870 | // OBSOLETE registers. Most of the work is done in mn10200_analyze_prologue(). |
| 871 | // OBSOLETE |
| 872 | // OBSOLETE Note that when we are called for the last frame (currently active frame), |
| 873 | // OBSOLETE that get_frame_pc (fi) and fi->frame will already be setup. However, fi->frame will |
| 874 | // OBSOLETE be valid only if this routine uses FP. For previous frames, fi-frame will |
| 875 | // OBSOLETE always be correct. mn10200_analyze_prologue will fix fi->frame if |
| 876 | // OBSOLETE it's not valid. |
| 877 | // OBSOLETE |
| 878 | // OBSOLETE We can be called with the PC in the call dummy under two circumstances. |
| 879 | // OBSOLETE First, during normal backtracing, second, while figuring out the frame |
| 880 | // OBSOLETE pointer just prior to calling the target function (see run_stack_dummy). */ |
| 881 | // OBSOLETE |
| 882 | // OBSOLETE void |
| 883 | // OBSOLETE mn10200_init_extra_frame_info (struct frame_info *fi) |
| 884 | // OBSOLETE { |
| 885 | // OBSOLETE if (get_next_frame (fi)) |
| 886 | // OBSOLETE deprecated_update_frame_pc_hack (fi, FRAME_SAVED_PC (get_next_frame (fi))); |
| 887 | // OBSOLETE |
| 888 | // OBSOLETE memset (fi->fsr.regs, '\000', sizeof fi->fsr.regs); |
| 889 | // OBSOLETE fi->status = 0; |
| 890 | // OBSOLETE fi->stack_size = 0; |
| 891 | // OBSOLETE |
| 892 | // OBSOLETE mn10200_analyze_prologue (fi, 0); |
| 893 | // OBSOLETE } |
| 894 | // OBSOLETE |
| 895 | // OBSOLETE void |
| 896 | // OBSOLETE _initialize_mn10200_tdep (void) |
| 897 | // OBSOLETE { |
| 898 | // OBSOLETE tm_print_insn = print_insn_mn10200; |
| 899 | // OBSOLETE } |