| 1 | /* Motorola m68k native support for GNU/Linux. |
| 2 | |
| 3 | Copyright 1996, 1998, 2000, 2001, 2002 Free Software Foundation, |
| 4 | Inc. |
| 5 | |
| 6 | This file is part of GDB. |
| 7 | |
| 8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 2 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program; if not, write to the Free Software |
| 20 | Foundation, Inc., 59 Temple Place - Suite 330, |
| 21 | Boston, MA 02111-1307, USA. */ |
| 22 | |
| 23 | #include "defs.h" |
| 24 | #include "frame.h" |
| 25 | #include "inferior.h" |
| 26 | #include "language.h" |
| 27 | #include "gdbcore.h" |
| 28 | #include "gdb_string.h" |
| 29 | #include "regcache.h" |
| 30 | |
| 31 | #include "m68k-tdep.h" |
| 32 | |
| 33 | #ifdef USG |
| 34 | #include <sys/types.h> |
| 35 | #endif |
| 36 | |
| 37 | #include <sys/param.h> |
| 38 | #include <sys/dir.h> |
| 39 | #include <signal.h> |
| 40 | #include <sys/ptrace.h> |
| 41 | #include <sys/user.h> |
| 42 | #include <sys/ioctl.h> |
| 43 | #include <fcntl.h> |
| 44 | #include <sys/procfs.h> |
| 45 | |
| 46 | #ifdef HAVE_SYS_REG_H |
| 47 | #include <sys/reg.h> |
| 48 | #endif |
| 49 | |
| 50 | #include <sys/file.h> |
| 51 | #include "gdb_stat.h" |
| 52 | |
| 53 | #include "floatformat.h" |
| 54 | |
| 55 | #include "target.h" |
| 56 | \f |
| 57 | /* This table must line up with REGISTER_NAMES in tm-m68k.h */ |
| 58 | static const int regmap[] = |
| 59 | { |
| 60 | PT_D0, PT_D1, PT_D2, PT_D3, PT_D4, PT_D5, PT_D6, PT_D7, |
| 61 | PT_A0, PT_A1, PT_A2, PT_A3, PT_A4, PT_A5, PT_A6, PT_USP, |
| 62 | PT_SR, PT_PC, |
| 63 | /* PT_FP0, ..., PT_FP7 */ |
| 64 | 21, 24, 27, 30, 33, 36, 39, 42, |
| 65 | /* PT_FPCR, PT_FPSR, PT_FPIAR */ |
| 66 | 45, 46, 47 |
| 67 | }; |
| 68 | |
| 69 | /* Which ptrace request retrieves which registers? |
| 70 | These apply to the corresponding SET requests as well. */ |
| 71 | #define NUM_GREGS (18) |
| 72 | #define MAX_NUM_REGS (NUM_GREGS + 11) |
| 73 | |
| 74 | int |
| 75 | getregs_supplies (int regno) |
| 76 | { |
| 77 | return 0 <= regno && regno < NUM_GREGS; |
| 78 | } |
| 79 | |
| 80 | int |
| 81 | getfpregs_supplies (int regno) |
| 82 | { |
| 83 | return FP0_REGNUM <= regno && regno <= M68K_FPI_REGNUM; |
| 84 | } |
| 85 | |
| 86 | /* Does the current host support the GETREGS request? */ |
| 87 | int have_ptrace_getregs = |
| 88 | #ifdef HAVE_PTRACE_GETREGS |
| 89 | 1 |
| 90 | #else |
| 91 | 0 |
| 92 | #endif |
| 93 | ; |
| 94 | |
| 95 | \f |
| 96 | |
| 97 | /* BLOCKEND is the value of u.u_ar0, and points to the place where GS |
| 98 | is stored. */ |
| 99 | |
| 100 | int |
| 101 | m68k_linux_register_u_addr (int blockend, int regnum) |
| 102 | { |
| 103 | return (blockend + 4 * regmap[regnum]); |
| 104 | } |
| 105 | \f |
| 106 | |
| 107 | /* Fetching registers directly from the U area, one at a time. */ |
| 108 | |
| 109 | /* FIXME: This duplicates code from `inptrace.c'. The problem is that we |
| 110 | define FETCH_INFERIOR_REGISTERS since we want to use our own versions |
| 111 | of {fetch,store}_inferior_registers that use the GETREGS request. This |
| 112 | means that the code in `infptrace.c' is #ifdef'd out. But we need to |
| 113 | fall back on that code when GDB is running on top of a kernel that |
| 114 | doesn't support the GETREGS request. */ |
| 115 | |
| 116 | #ifndef PT_READ_U |
| 117 | #define PT_READ_U PTRACE_PEEKUSR |
| 118 | #endif |
| 119 | #ifndef PT_WRITE_U |
| 120 | #define PT_WRITE_U PTRACE_POKEUSR |
| 121 | #endif |
| 122 | |
| 123 | /* Default the type of the ptrace transfer to int. */ |
| 124 | #ifndef PTRACE_XFER_TYPE |
| 125 | #define PTRACE_XFER_TYPE int |
| 126 | #endif |
| 127 | |
| 128 | /* Fetch one register. */ |
| 129 | |
| 130 | static void |
| 131 | fetch_register (int regno) |
| 132 | { |
| 133 | /* This isn't really an address. But ptrace thinks of it as one. */ |
| 134 | CORE_ADDR regaddr; |
| 135 | char mess[128]; /* For messages */ |
| 136 | register int i; |
| 137 | unsigned int offset; /* Offset of registers within the u area. */ |
| 138 | char buf[MAX_REGISTER_SIZE]; |
| 139 | int tid; |
| 140 | |
| 141 | if (CANNOT_FETCH_REGISTER (regno)) |
| 142 | { |
| 143 | memset (buf, '\0', REGISTER_RAW_SIZE (regno)); /* Supply zeroes */ |
| 144 | supply_register (regno, buf); |
| 145 | return; |
| 146 | } |
| 147 | |
| 148 | /* Overload thread id onto process id */ |
| 149 | if ((tid = TIDGET (inferior_ptid)) == 0) |
| 150 | tid = PIDGET (inferior_ptid); /* no thread id, just use process id */ |
| 151 | |
| 152 | offset = U_REGS_OFFSET; |
| 153 | |
| 154 | regaddr = register_addr (regno, offset); |
| 155 | for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (PTRACE_XFER_TYPE)) |
| 156 | { |
| 157 | errno = 0; |
| 158 | *(PTRACE_XFER_TYPE *) & buf[i] = ptrace (PT_READ_U, tid, |
| 159 | (PTRACE_ARG3_TYPE) regaddr, 0); |
| 160 | regaddr += sizeof (PTRACE_XFER_TYPE); |
| 161 | if (errno != 0) |
| 162 | { |
| 163 | sprintf (mess, "reading register %s (#%d)", |
| 164 | REGISTER_NAME (regno), regno); |
| 165 | perror_with_name (mess); |
| 166 | } |
| 167 | } |
| 168 | supply_register (regno, buf); |
| 169 | } |
| 170 | |
| 171 | /* Fetch register values from the inferior. |
| 172 | If REGNO is negative, do this for all registers. |
| 173 | Otherwise, REGNO specifies which register (so we can save time). */ |
| 174 | |
| 175 | void |
| 176 | old_fetch_inferior_registers (int regno) |
| 177 | { |
| 178 | if (regno >= 0) |
| 179 | { |
| 180 | fetch_register (regno); |
| 181 | } |
| 182 | else |
| 183 | { |
| 184 | for (regno = 0; regno < NUM_REGS; regno++) |
| 185 | { |
| 186 | fetch_register (regno); |
| 187 | } |
| 188 | } |
| 189 | } |
| 190 | |
| 191 | /* Store one register. */ |
| 192 | |
| 193 | static void |
| 194 | store_register (int regno) |
| 195 | { |
| 196 | /* This isn't really an address. But ptrace thinks of it as one. */ |
| 197 | CORE_ADDR regaddr; |
| 198 | char mess[128]; /* For messages */ |
| 199 | register int i; |
| 200 | unsigned int offset; /* Offset of registers within the u area. */ |
| 201 | int tid; |
| 202 | char buf[MAX_REGISTER_SIZE]; |
| 203 | |
| 204 | if (CANNOT_STORE_REGISTER (regno)) |
| 205 | { |
| 206 | return; |
| 207 | } |
| 208 | |
| 209 | /* Overload thread id onto process id */ |
| 210 | if ((tid = TIDGET (inferior_ptid)) == 0) |
| 211 | tid = PIDGET (inferior_ptid); /* no thread id, just use process id */ |
| 212 | |
| 213 | offset = U_REGS_OFFSET; |
| 214 | |
| 215 | regaddr = register_addr (regno, offset); |
| 216 | |
| 217 | /* Put the contents of regno into a local buffer */ |
| 218 | regcache_collect (regno, buf); |
| 219 | |
| 220 | /* Store the local buffer into the inferior a chunk at the time. */ |
| 221 | for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (PTRACE_XFER_TYPE)) |
| 222 | { |
| 223 | errno = 0; |
| 224 | ptrace (PT_WRITE_U, tid, (PTRACE_ARG3_TYPE) regaddr, |
| 225 | *(PTRACE_XFER_TYPE *) (buf + i)); |
| 226 | regaddr += sizeof (PTRACE_XFER_TYPE); |
| 227 | if (errno != 0) |
| 228 | { |
| 229 | sprintf (mess, "writing register %s (#%d)", |
| 230 | REGISTER_NAME (regno), regno); |
| 231 | perror_with_name (mess); |
| 232 | } |
| 233 | } |
| 234 | } |
| 235 | |
| 236 | /* Store our register values back into the inferior. |
| 237 | If REGNO is negative, do this for all registers. |
| 238 | Otherwise, REGNO specifies which register (so we can save time). */ |
| 239 | |
| 240 | void |
| 241 | old_store_inferior_registers (int regno) |
| 242 | { |
| 243 | if (regno >= 0) |
| 244 | { |
| 245 | store_register (regno); |
| 246 | } |
| 247 | else |
| 248 | { |
| 249 | for (regno = 0; regno < NUM_REGS; regno++) |
| 250 | { |
| 251 | store_register (regno); |
| 252 | } |
| 253 | } |
| 254 | } |
| 255 | \f |
| 256 | /* Given a pointer to a general register set in /proc format |
| 257 | (elf_gregset_t *), unpack the register contents and supply |
| 258 | them as gdb's idea of the current register values. */ |
| 259 | |
| 260 | |
| 261 | /* Note both m68k-tdep.c and m68klinux-nat.c contain definitions |
| 262 | for supply_gregset and supply_fpregset. The definitions |
| 263 | in m68k-tdep.c are valid if USE_PROC_FS is defined. Otherwise, |
| 264 | the definitions in m68klinux-nat.c will be used. This is a |
| 265 | bit of a hack. The supply_* routines do not belong in |
| 266 | *_tdep.c files. But, there are several lynx ports that currently |
| 267 | depend on these definitions. */ |
| 268 | |
| 269 | #ifndef USE_PROC_FS |
| 270 | |
| 271 | /* Prototypes for supply_gregset etc. */ |
| 272 | #include "gregset.h" |
| 273 | |
| 274 | void |
| 275 | supply_gregset (elf_gregset_t *gregsetp) |
| 276 | { |
| 277 | elf_greg_t *regp = (elf_greg_t *) gregsetp; |
| 278 | int regi; |
| 279 | |
| 280 | for (regi = M68K_D0_REGNUM; regi <= SP_REGNUM; regi++) |
| 281 | supply_register (regi, (char *) ®p[regmap[regi]]); |
| 282 | supply_register (PS_REGNUM, (char *) ®p[PT_SR]); |
| 283 | supply_register (PC_REGNUM, (char *) ®p[PT_PC]); |
| 284 | } |
| 285 | |
| 286 | /* Fill register REGNO (if it is a general-purpose register) in |
| 287 | *GREGSETPS with the value in GDB's register array. If REGNO is -1, |
| 288 | do this for all registers. */ |
| 289 | void |
| 290 | fill_gregset (elf_gregset_t *gregsetp, int regno) |
| 291 | { |
| 292 | elf_greg_t *regp = (elf_greg_t *) gregsetp; |
| 293 | int i; |
| 294 | |
| 295 | for (i = 0; i < NUM_GREGS; i++) |
| 296 | if ((regno == -1 || regno == i)) |
| 297 | regcache_collect (i, regp + regmap[i]); |
| 298 | } |
| 299 | |
| 300 | #ifdef HAVE_PTRACE_GETREGS |
| 301 | |
| 302 | /* Fetch all general-purpose registers from process/thread TID and |
| 303 | store their values in GDB's register array. */ |
| 304 | |
| 305 | static void |
| 306 | fetch_regs (int tid) |
| 307 | { |
| 308 | elf_gregset_t regs; |
| 309 | |
| 310 | if (ptrace (PTRACE_GETREGS, tid, 0, (int) ®s) < 0) |
| 311 | { |
| 312 | if (errno == EIO) |
| 313 | { |
| 314 | /* The kernel we're running on doesn't support the GETREGS |
| 315 | request. Reset `have_ptrace_getregs'. */ |
| 316 | have_ptrace_getregs = 0; |
| 317 | return; |
| 318 | } |
| 319 | |
| 320 | perror_with_name ("Couldn't get registers"); |
| 321 | } |
| 322 | |
| 323 | supply_gregset (®s); |
| 324 | } |
| 325 | |
| 326 | /* Store all valid general-purpose registers in GDB's register array |
| 327 | into the process/thread specified by TID. */ |
| 328 | |
| 329 | static void |
| 330 | store_regs (int tid, int regno) |
| 331 | { |
| 332 | elf_gregset_t regs; |
| 333 | |
| 334 | if (ptrace (PTRACE_GETREGS, tid, 0, (int) ®s) < 0) |
| 335 | perror_with_name ("Couldn't get registers"); |
| 336 | |
| 337 | fill_gregset (®s, regno); |
| 338 | |
| 339 | if (ptrace (PTRACE_SETREGS, tid, 0, (int) ®s) < 0) |
| 340 | perror_with_name ("Couldn't write registers"); |
| 341 | } |
| 342 | |
| 343 | #else |
| 344 | |
| 345 | static void fetch_regs (int tid) {} |
| 346 | static void store_regs (int tid, int regno) {} |
| 347 | |
| 348 | #endif |
| 349 | |
| 350 | \f |
| 351 | /* Transfering floating-point registers between GDB, inferiors and cores. */ |
| 352 | |
| 353 | /* What is the address of fpN within the floating-point register set F? */ |
| 354 | #define FPREG_ADDR(f, n) ((char *) &(f)->fpregs[(n) * 3]) |
| 355 | |
| 356 | /* Fill GDB's register array with the floating-point register values in |
| 357 | *FPREGSETP. */ |
| 358 | |
| 359 | void |
| 360 | supply_fpregset (elf_fpregset_t *fpregsetp) |
| 361 | { |
| 362 | int regi; |
| 363 | |
| 364 | for (regi = FP0_REGNUM; regi < FP0_REGNUM + 8; regi++) |
| 365 | supply_register (regi, FPREG_ADDR (fpregsetp, regi - FP0_REGNUM)); |
| 366 | supply_register (M68K_FPC_REGNUM, (char *) &fpregsetp->fpcntl[0]); |
| 367 | supply_register (M68K_FPS_REGNUM, (char *) &fpregsetp->fpcntl[1]); |
| 368 | supply_register (M68K_FPI_REGNUM, (char *) &fpregsetp->fpcntl[2]); |
| 369 | } |
| 370 | |
| 371 | /* Fill register REGNO (if it is a floating-point register) in |
| 372 | *FPREGSETP with the value in GDB's register array. If REGNO is -1, |
| 373 | do this for all registers. */ |
| 374 | |
| 375 | void |
| 376 | fill_fpregset (elf_fpregset_t *fpregsetp, int regno) |
| 377 | { |
| 378 | int i; |
| 379 | |
| 380 | /* Fill in the floating-point registers. */ |
| 381 | for (i = FP0_REGNUM; i < FP0_REGNUM + 8; i++) |
| 382 | if (regno == -1 || regno == i) |
| 383 | regcache_collect (regno, FPREG_ADDR (fpregsetp, regno - FP0_REGNUM)); |
| 384 | |
| 385 | /* Fill in the floating-point control registers. */ |
| 386 | for (i = M68K_FPC_REGNUM; i <= M68K_FPI_REGNUM; i++) |
| 387 | if (regno == -1 || regno == i) |
| 388 | regcache_collect (regno, (char *) &fpregsetp->fpcntl[regno - M68K_FPC_REGNUM]); |
| 389 | } |
| 390 | |
| 391 | #ifdef HAVE_PTRACE_GETREGS |
| 392 | |
| 393 | /* Fetch all floating-point registers from process/thread TID and store |
| 394 | thier values in GDB's register array. */ |
| 395 | |
| 396 | static void |
| 397 | fetch_fpregs (int tid) |
| 398 | { |
| 399 | elf_fpregset_t fpregs; |
| 400 | |
| 401 | if (ptrace (PTRACE_GETFPREGS, tid, 0, (int) &fpregs) < 0) |
| 402 | perror_with_name ("Couldn't get floating point status"); |
| 403 | |
| 404 | supply_fpregset (&fpregs); |
| 405 | } |
| 406 | |
| 407 | /* Store all valid floating-point registers in GDB's register array |
| 408 | into the process/thread specified by TID. */ |
| 409 | |
| 410 | static void |
| 411 | store_fpregs (int tid, int regno) |
| 412 | { |
| 413 | elf_fpregset_t fpregs; |
| 414 | |
| 415 | if (ptrace (PTRACE_GETFPREGS, tid, 0, (int) &fpregs) < 0) |
| 416 | perror_with_name ("Couldn't get floating point status"); |
| 417 | |
| 418 | fill_fpregset (&fpregs, regno); |
| 419 | |
| 420 | if (ptrace (PTRACE_SETFPREGS, tid, 0, (int) &fpregs) < 0) |
| 421 | perror_with_name ("Couldn't write floating point status"); |
| 422 | } |
| 423 | |
| 424 | #else |
| 425 | |
| 426 | static void fetch_fpregs (int tid) {} |
| 427 | static void store_fpregs (int tid, int regno) {} |
| 428 | |
| 429 | #endif |
| 430 | |
| 431 | #endif |
| 432 | \f |
| 433 | /* Transferring arbitrary registers between GDB and inferior. */ |
| 434 | |
| 435 | /* Fetch register REGNO from the child process. If REGNO is -1, do |
| 436 | this for all registers (including the floating point and SSE |
| 437 | registers). */ |
| 438 | |
| 439 | void |
| 440 | fetch_inferior_registers (int regno) |
| 441 | { |
| 442 | int tid; |
| 443 | |
| 444 | /* Use the old method of peeking around in `struct user' if the |
| 445 | GETREGS request isn't available. */ |
| 446 | if (! have_ptrace_getregs) |
| 447 | { |
| 448 | old_fetch_inferior_registers (regno); |
| 449 | return; |
| 450 | } |
| 451 | |
| 452 | /* GNU/Linux LWP ID's are process ID's. */ |
| 453 | if ((tid = TIDGET (inferior_ptid)) == 0) |
| 454 | tid = PIDGET (inferior_ptid); /* Not a threaded program. */ |
| 455 | |
| 456 | /* Use the PTRACE_GETFPXREGS request whenever possible, since it |
| 457 | transfers more registers in one system call, and we'll cache the |
| 458 | results. But remember that fetch_fpxregs can fail, and return |
| 459 | zero. */ |
| 460 | if (regno == -1) |
| 461 | { |
| 462 | fetch_regs (tid); |
| 463 | |
| 464 | /* The call above might reset `have_ptrace_getregs'. */ |
| 465 | if (! have_ptrace_getregs) |
| 466 | { |
| 467 | old_fetch_inferior_registers (-1); |
| 468 | return; |
| 469 | } |
| 470 | |
| 471 | fetch_fpregs (tid); |
| 472 | return; |
| 473 | } |
| 474 | |
| 475 | if (getregs_supplies (regno)) |
| 476 | { |
| 477 | fetch_regs (tid); |
| 478 | return; |
| 479 | } |
| 480 | |
| 481 | if (getfpregs_supplies (regno)) |
| 482 | { |
| 483 | fetch_fpregs (tid); |
| 484 | return; |
| 485 | } |
| 486 | |
| 487 | internal_error (__FILE__, __LINE__, |
| 488 | "Got request for bad register number %d.", regno); |
| 489 | } |
| 490 | |
| 491 | /* Store register REGNO back into the child process. If REGNO is -1, |
| 492 | do this for all registers (including the floating point and SSE |
| 493 | registers). */ |
| 494 | void |
| 495 | store_inferior_registers (int regno) |
| 496 | { |
| 497 | int tid; |
| 498 | |
| 499 | /* Use the old method of poking around in `struct user' if the |
| 500 | SETREGS request isn't available. */ |
| 501 | if (! have_ptrace_getregs) |
| 502 | { |
| 503 | old_store_inferior_registers (regno); |
| 504 | return; |
| 505 | } |
| 506 | |
| 507 | /* GNU/Linux LWP ID's are process ID's. */ |
| 508 | if ((tid = TIDGET (inferior_ptid)) == 0) |
| 509 | tid = PIDGET (inferior_ptid); /* Not a threaded program. */ |
| 510 | |
| 511 | /* Use the PTRACE_SETFPREGS requests whenever possible, since it |
| 512 | transfers more registers in one system call. But remember that |
| 513 | store_fpregs can fail, and return zero. */ |
| 514 | if (regno == -1) |
| 515 | { |
| 516 | store_regs (tid, regno); |
| 517 | store_fpregs (tid, regno); |
| 518 | return; |
| 519 | } |
| 520 | |
| 521 | if (getregs_supplies (regno)) |
| 522 | { |
| 523 | store_regs (tid, regno); |
| 524 | return; |
| 525 | } |
| 526 | |
| 527 | if (getfpregs_supplies (regno)) |
| 528 | { |
| 529 | store_fpregs (tid, regno); |
| 530 | return; |
| 531 | } |
| 532 | |
| 533 | internal_error (__FILE__, __LINE__, |
| 534 | "Got request to store bad register number %d.", regno); |
| 535 | } |
| 536 | \f |
| 537 | /* Interpreting register set info found in core files. */ |
| 538 | |
| 539 | /* Provide registers to GDB from a core file. |
| 540 | |
| 541 | (We can't use the generic version of this function in |
| 542 | core-regset.c, because we need to use elf_gregset_t instead of |
| 543 | gregset_t.) |
| 544 | |
| 545 | CORE_REG_SECT points to an array of bytes, which are the contents |
| 546 | of a `note' from a core file which BFD thinks might contain |
| 547 | register contents. CORE_REG_SIZE is its size. |
| 548 | |
| 549 | WHICH says which register set corelow suspects this is: |
| 550 | 0 --- the general-purpose register set, in elf_gregset_t format |
| 551 | 2 --- the floating-point register set, in elf_fpregset_t format |
| 552 | |
| 553 | REG_ADDR isn't used on GNU/Linux. */ |
| 554 | |
| 555 | static void |
| 556 | fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, |
| 557 | int which, CORE_ADDR reg_addr) |
| 558 | { |
| 559 | elf_gregset_t gregset; |
| 560 | elf_fpregset_t fpregset; |
| 561 | |
| 562 | switch (which) |
| 563 | { |
| 564 | case 0: |
| 565 | if (core_reg_size != sizeof (gregset)) |
| 566 | warning ("Wrong size gregset in core file."); |
| 567 | else |
| 568 | { |
| 569 | memcpy (&gregset, core_reg_sect, sizeof (gregset)); |
| 570 | supply_gregset (&gregset); |
| 571 | } |
| 572 | break; |
| 573 | |
| 574 | case 2: |
| 575 | if (core_reg_size != sizeof (fpregset)) |
| 576 | warning ("Wrong size fpregset in core file."); |
| 577 | else |
| 578 | { |
| 579 | memcpy (&fpregset, core_reg_sect, sizeof (fpregset)); |
| 580 | supply_fpregset (&fpregset); |
| 581 | } |
| 582 | break; |
| 583 | |
| 584 | default: |
| 585 | /* We've covered all the kinds of registers we know about here, |
| 586 | so this must be something we wouldn't know what to do with |
| 587 | anyway. Just ignore it. */ |
| 588 | break; |
| 589 | } |
| 590 | } |
| 591 | \f |
| 592 | |
| 593 | int |
| 594 | kernel_u_size (void) |
| 595 | { |
| 596 | return (sizeof (struct user)); |
| 597 | } |
| 598 | \f |
| 599 | /* Register that we are able to handle GNU/Linux ELF core file |
| 600 | formats. */ |
| 601 | |
| 602 | static struct core_fns linux_elf_core_fns = |
| 603 | { |
| 604 | bfd_target_elf_flavour, /* core_flavour */ |
| 605 | default_check_format, /* check_format */ |
| 606 | default_core_sniffer, /* core_sniffer */ |
| 607 | fetch_core_registers, /* core_read_registers */ |
| 608 | NULL /* next */ |
| 609 | }; |
| 610 | |
| 611 | void |
| 612 | _initialize_m68k_linux_nat (void) |
| 613 | { |
| 614 | add_core_fns (&linux_elf_core_fns); |
| 615 | } |