Commit | Line | Data |
---|---|---|
c906108c | 1 | /* IBM RS/6000 native-dependent code for GDB, the GNU debugger. |
b6ba6518 | 2 | Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997, |
19caaa45 | 3 | 1998, 1999, 2000, 2001, 2002 |
c5aa993b | 4 | Free Software Foundation, Inc. |
c906108c | 5 | |
c5aa993b | 6 | This file is part of GDB. |
c906108c | 7 | |
c5aa993b JM |
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. | |
c906108c | 12 | |
c5aa993b JM |
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. | |
c906108c | 17 | |
c5aa993b JM |
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. */ | |
c906108c SS |
22 | |
23 | #include "defs.h" | |
24 | #include "inferior.h" | |
25 | #include "target.h" | |
26 | #include "gdbcore.h" | |
27 | #include "xcoffsolib.h" | |
28 | #include "symfile.h" | |
29 | #include "objfiles.h" | |
c5aa993b | 30 | #include "libbfd.h" /* For bfd_cache_lookup (FIXME) */ |
c906108c SS |
31 | #include "bfd.h" |
32 | #include "gdb-stabs.h" | |
4e052eda | 33 | #include "regcache.h" |
19caaa45 | 34 | #include "arch-utils.h" |
c906108c SS |
35 | |
36 | #include <sys/ptrace.h> | |
37 | #include <sys/reg.h> | |
38 | ||
39 | #include <sys/param.h> | |
40 | #include <sys/dir.h> | |
41 | #include <sys/user.h> | |
42 | #include <signal.h> | |
43 | #include <sys/ioctl.h> | |
44 | #include <fcntl.h> | |
7a78ae4e | 45 | #include <errno.h> |
c906108c SS |
46 | |
47 | #include <a.out.h> | |
48 | #include <sys/file.h> | |
49 | #include "gdb_stat.h" | |
50 | #include <sys/core.h> | |
7a78ae4e ND |
51 | #define __LDINFO_PTRACE32__ /* for __ld_info32 */ |
52 | #define __LDINFO_PTRACE64__ /* for __ld_info64 */ | |
c906108c | 53 | #include <sys/ldr.h> |
7a78ae4e | 54 | #include <sys/systemcfg.h> |
c906108c | 55 | |
7a78ae4e ND |
56 | /* On AIX4.3+, sys/ldr.h provides different versions of struct ld_info for |
57 | debugging 32-bit and 64-bit processes. Define a typedef and macros for | |
58 | accessing fields in the appropriate structures. */ | |
59 | ||
60 | /* In 32-bit compilation mode (which is the only mode from which ptrace() | |
61 | works on 4.3), __ld_info32 is #defined as equivalent to ld_info. */ | |
62 | ||
63 | #ifdef __ld_info32 | |
64 | # define ARCH3264 | |
65 | #endif | |
66 | ||
67 | /* Return whether the current architecture is 64-bit. */ | |
68 | ||
69 | #ifndef ARCH3264 | |
70 | # define ARCH64() 0 | |
71 | #else | |
72 | # define ARCH64() (REGISTER_RAW_SIZE (0) == 8) | |
73 | #endif | |
74 | ||
75 | /* Union of 32-bit and 64-bit ".reg" core file sections. */ | |
76 | ||
77 | typedef union { | |
78 | #ifdef ARCH3264 | |
79 | struct __context64 r64; | |
80 | #else | |
81 | struct mstsave r64; | |
82 | #endif | |
83 | struct mstsave r32; | |
84 | } CoreRegs; | |
85 | ||
86 | /* Union of 32-bit and 64-bit versions of ld_info. */ | |
87 | ||
88 | typedef union { | |
89 | #ifndef ARCH3264 | |
90 | struct ld_info l32; | |
91 | struct ld_info l64; | |
92 | #else | |
93 | struct __ld_info32 l32; | |
94 | struct __ld_info64 l64; | |
95 | #endif | |
96 | } LdInfo; | |
97 | ||
98 | /* If compiling with 32-bit and 64-bit debugging capability (e.g. AIX 4.x), | |
99 | declare and initialize a variable named VAR suitable for use as the arch64 | |
100 | parameter to the various LDI_*() macros. */ | |
101 | ||
102 | #ifndef ARCH3264 | |
103 | # define ARCH64_DECL(var) | |
104 | #else | |
105 | # define ARCH64_DECL(var) int var = ARCH64 () | |
106 | #endif | |
107 | ||
108 | /* Return LDI's FIELD for a 64-bit process if ARCH64 and for a 32-bit process | |
109 | otherwise. This technique only works for FIELDs with the same data type in | |
110 | 32-bit and 64-bit versions of ld_info. */ | |
111 | ||
112 | #ifndef ARCH3264 | |
113 | # define LDI_FIELD(ldi, arch64, field) (ldi)->l32.ldinfo_##field | |
114 | #else | |
115 | # define LDI_FIELD(ldi, arch64, field) \ | |
116 | (arch64 ? (ldi)->l64.ldinfo_##field : (ldi)->l32.ldinfo_##field) | |
117 | #endif | |
118 | ||
119 | /* Return various LDI fields for a 64-bit process if ARCH64 and for a 32-bit | |
120 | process otherwise. */ | |
121 | ||
122 | #define LDI_NEXT(ldi, arch64) LDI_FIELD(ldi, arch64, next) | |
123 | #define LDI_FD(ldi, arch64) LDI_FIELD(ldi, arch64, fd) | |
124 | #define LDI_FILENAME(ldi, arch64) LDI_FIELD(ldi, arch64, filename) | |
c906108c | 125 | |
a14ed312 | 126 | extern struct vmap *map_vmap (bfd * bf, bfd * arch); |
c906108c SS |
127 | |
128 | extern struct target_ops exec_ops; | |
129 | ||
a14ed312 | 130 | static void vmap_exec (void); |
c906108c | 131 | |
7a78ae4e | 132 | static void vmap_ldinfo (LdInfo *); |
c906108c | 133 | |
7a78ae4e | 134 | static struct vmap *add_vmap (LdInfo *); |
c906108c | 135 | |
7a78ae4e | 136 | static int objfile_symbol_add (void *); |
c906108c | 137 | |
a14ed312 | 138 | static void vmap_symtab (struct vmap *); |
c906108c | 139 | |
a14ed312 | 140 | static void fetch_core_registers (char *, unsigned int, int, CORE_ADDR); |
c906108c | 141 | |
a14ed312 | 142 | static void exec_one_dummy_insn (void); |
c906108c SS |
143 | |
144 | extern void | |
a14ed312 | 145 | fixup_breakpoints (CORE_ADDR low, CORE_ADDR high, CORE_ADDR delta); |
c906108c | 146 | |
7a78ae4e | 147 | /* Conversion from gdb-to-system special purpose register numbers. */ |
c906108c | 148 | |
c5aa993b JM |
149 | static int special_regs[] = |
150 | { | |
151 | IAR, /* PC_REGNUM */ | |
152 | MSR, /* PS_REGNUM */ | |
153 | CR, /* CR_REGNUM */ | |
154 | LR, /* LR_REGNUM */ | |
155 | CTR, /* CTR_REGNUM */ | |
c906108c | 156 | XER, /* XER_REGNUM */ |
c5aa993b | 157 | MQ /* MQ_REGNUM */ |
c906108c SS |
158 | }; |
159 | ||
7a78ae4e | 160 | /* Call ptrace(REQ, ID, ADDR, DATA, BUF). */ |
c906108c | 161 | |
7a78ae4e ND |
162 | static int |
163 | ptrace32 (int req, int id, int *addr, int data, int *buf) | |
164 | { | |
165 | int ret = ptrace (req, id, (int *)addr, data, buf); | |
166 | #if 0 | |
167 | printf ("ptrace32 (%d, %d, 0x%x, %08x, 0x%x) = 0x%x\n", | |
168 | req, id, (unsigned int)addr, data, (unsigned int)buf, ret); | |
169 | #endif | |
170 | return ret; | |
171 | } | |
c906108c | 172 | |
7a78ae4e | 173 | /* Call ptracex(REQ, ID, ADDR, DATA, BUF). */ |
c906108c | 174 | |
7a78ae4e ND |
175 | static int |
176 | ptrace64 (int req, int id, long long addr, int data, int *buf) | |
177 | { | |
178 | #ifdef ARCH3264 | |
179 | int ret = ptracex (req, id, addr, data, buf); | |
180 | #else | |
181 | int ret = 0; | |
182 | #endif | |
183 | #if 0 | |
184 | printf ("ptrace64 (%d, %d, 0x%llx, %08x, 0x%x) = 0x%x\n", | |
185 | req, id, addr, data, (unsigned int)buf, ret); | |
186 | #endif | |
187 | return ret; | |
188 | } | |
c906108c | 189 | |
7a78ae4e | 190 | /* Fetch register REGNO from the inferior. */ |
c906108c | 191 | |
7a78ae4e ND |
192 | static void |
193 | fetch_register (int regno) | |
194 | { | |
195 | int *addr = (int *) ®isters[REGISTER_BYTE (regno)]; | |
196 | int nr; | |
c906108c | 197 | |
7a78ae4e ND |
198 | /* Retrieved values may be -1, so infer errors from errno. */ |
199 | errno = 0; | |
c906108c | 200 | |
7a78ae4e ND |
201 | /* Floating-point registers. */ |
202 | if (regno >= FP0_REGNUM && regno <= FPLAST_REGNUM) | |
203 | { | |
204 | nr = regno - FP0_REGNUM + FPR0; | |
39f77062 | 205 | ptrace32 (PT_READ_FPR, PIDGET (inferior_ptid), addr, nr, 0); |
c5aa993b | 206 | } |
c906108c | 207 | |
7a78ae4e ND |
208 | /* Bogus register number. */ |
209 | else if (regno > LAST_UISA_SP_REGNUM) | |
2a18e3d9 EZ |
210 | { |
211 | if (regno >= NUM_REGS) | |
212 | fprintf_unfiltered (gdb_stderr, | |
213 | "gdb error: register no %d not implemented.\n", | |
214 | regno); | |
215 | } | |
c906108c | 216 | |
7a78ae4e ND |
217 | /* Fixed-point registers. */ |
218 | else | |
219 | { | |
220 | if (regno >= FIRST_UISA_SP_REGNUM) | |
221 | nr = special_regs[regno - FIRST_UISA_SP_REGNUM]; | |
222 | else | |
223 | nr = regno; | |
224 | ||
225 | if (!ARCH64 ()) | |
39f77062 | 226 | *addr = ptrace32 (PT_READ_GPR, PIDGET (inferior_ptid), (int *)nr, 0, 0); |
7a78ae4e ND |
227 | else |
228 | { | |
229 | /* PT_READ_GPR requires the buffer parameter to point to long long, | |
230 | even if the register is really only 32 bits. */ | |
231 | long long buf; | |
39f77062 | 232 | ptrace64 (PT_READ_GPR, PIDGET (inferior_ptid), nr, 0, (int *)&buf); |
7a78ae4e ND |
233 | if (REGISTER_RAW_SIZE (regno) == 8) |
234 | memcpy (addr, &buf, 8); | |
235 | else | |
236 | *addr = buf; | |
237 | } | |
238 | } | |
239 | ||
240 | if (!errno) | |
241 | register_valid[regno] = 1; | |
242 | else | |
243 | { | |
244 | #if 0 | |
245 | /* FIXME: this happens 3 times at the start of each 64-bit program. */ | |
246 | perror ("ptrace read"); | |
247 | #endif | |
248 | errno = 0; | |
249 | } | |
c906108c SS |
250 | } |
251 | ||
7a78ae4e | 252 | /* Store register REGNO back into the inferior. */ |
c906108c | 253 | |
7a78ae4e ND |
254 | static void |
255 | store_register (int regno) | |
c906108c | 256 | { |
7a78ae4e ND |
257 | int *addr = (int *) ®isters[REGISTER_BYTE (regno)]; |
258 | int nr; | |
c906108c | 259 | |
7a78ae4e | 260 | /* -1 can be a successful return value, so infer errors from errno. */ |
c906108c SS |
261 | errno = 0; |
262 | ||
7a78ae4e ND |
263 | /* Floating-point registers. */ |
264 | if (regno >= FP0_REGNUM && regno <= FPLAST_REGNUM) | |
265 | { | |
266 | nr = regno - FP0_REGNUM + FPR0; | |
39f77062 | 267 | ptrace32 (PT_WRITE_FPR, PIDGET (inferior_ptid), addr, nr, 0); |
7a78ae4e | 268 | } |
c906108c | 269 | |
7a78ae4e ND |
270 | /* Bogus register number. */ |
271 | else if (regno > LAST_UISA_SP_REGNUM) | |
272 | { | |
273 | if (regno >= NUM_REGS) | |
274 | fprintf_unfiltered (gdb_stderr, | |
275 | "gdb error: register no %d not implemented.\n", | |
276 | regno); | |
277 | } | |
c906108c | 278 | |
7a78ae4e ND |
279 | /* Fixed-point registers. */ |
280 | else | |
281 | { | |
282 | if (regno == SP_REGNUM) | |
283 | /* Execute one dummy instruction (which is a breakpoint) in inferior | |
284 | process to give kernel a chance to do internal housekeeping. | |
285 | Otherwise the following ptrace(2) calls will mess up user stack | |
286 | since kernel will get confused about the bottom of the stack | |
287 | (%sp). */ | |
288 | exec_one_dummy_insn (); | |
c906108c | 289 | |
7a78ae4e ND |
290 | if (regno >= FIRST_UISA_SP_REGNUM) |
291 | nr = special_regs[regno - FIRST_UISA_SP_REGNUM]; | |
292 | else | |
293 | nr = regno; | |
c906108c | 294 | |
7a78ae4e | 295 | if (!ARCH64 ()) |
39f77062 | 296 | ptrace32 (PT_WRITE_GPR, PIDGET (inferior_ptid), (int *)nr, *addr, 0); |
7a78ae4e | 297 | else |
c906108c | 298 | { |
7a78ae4e ND |
299 | /* PT_WRITE_GPR requires the buffer parameter to point to an 8-byte |
300 | area, even if the register is really only 32 bits. */ | |
301 | long long buf; | |
302 | if (REGISTER_RAW_SIZE (regno) == 8) | |
303 | memcpy (&buf, addr, 8); | |
304 | else | |
305 | buf = *addr; | |
39f77062 | 306 | ptrace64 (PT_WRITE_GPR, PIDGET (inferior_ptid), nr, 0, (int *)&buf); |
c906108c SS |
307 | } |
308 | } | |
309 | ||
7a78ae4e | 310 | if (errno) |
c906108c | 311 | { |
7a78ae4e ND |
312 | perror ("ptrace write"); |
313 | errno = 0; | |
c906108c | 314 | } |
7a78ae4e | 315 | } |
c906108c | 316 | |
7a78ae4e ND |
317 | /* Read from the inferior all registers if REGNO == -1 and just register |
318 | REGNO otherwise. */ | |
c906108c | 319 | |
7a78ae4e ND |
320 | void |
321 | fetch_inferior_registers (int regno) | |
322 | { | |
323 | if (regno != -1) | |
324 | fetch_register (regno); | |
325 | ||
326 | else | |
c906108c | 327 | { |
7a78ae4e ND |
328 | /* read 32 general purpose registers. */ |
329 | for (regno = 0; regno < 32; regno++) | |
330 | fetch_register (regno); | |
331 | ||
332 | /* read general purpose floating point registers. */ | |
333 | for (regno = FP0_REGNUM; regno <= FPLAST_REGNUM; regno++) | |
334 | fetch_register (regno); | |
335 | ||
336 | /* read special registers. */ | |
337 | for (regno = FIRST_UISA_SP_REGNUM; regno <= LAST_UISA_SP_REGNUM; regno++) | |
338 | fetch_register (regno); | |
c906108c | 339 | } |
7a78ae4e | 340 | } |
c906108c | 341 | |
7a78ae4e ND |
342 | /* Store our register values back into the inferior. |
343 | If REGNO is -1, do this for all registers. | |
344 | Otherwise, REGNO specifies which register (so we can save time). */ | |
345 | ||
346 | void | |
347 | store_inferior_registers (int regno) | |
348 | { | |
349 | if (regno != -1) | |
350 | store_register (regno); | |
351 | ||
352 | else | |
f6077098 | 353 | { |
7a78ae4e ND |
354 | /* write general purpose registers first! */ |
355 | for (regno = GPR0; regno <= GPR31; regno++) | |
356 | store_register (regno); | |
357 | ||
358 | /* write floating point registers now. */ | |
359 | for (regno = FP0_REGNUM; regno <= FPLAST_REGNUM; regno++) | |
360 | store_register (regno); | |
361 | ||
362 | /* write special registers. */ | |
363 | ||
364 | for (regno = FIRST_UISA_SP_REGNUM; regno <= LAST_UISA_SP_REGNUM; regno++) | |
365 | store_register (regno); | |
f6077098 | 366 | } |
7a78ae4e | 367 | } |
f6077098 | 368 | |
7a78ae4e ND |
369 | /* Store in *TO the 32-bit word at 32-bit-aligned ADDR in the child |
370 | process, which is 64-bit if ARCH64 and 32-bit otherwise. Return | |
371 | success. */ | |
372 | ||
373 | static int | |
374 | read_word (CORE_ADDR from, int *to, int arch64) | |
375 | { | |
376 | /* Retrieved values may be -1, so infer errors from errno. */ | |
377 | errno = 0; | |
378 | ||
379 | if (arch64) | |
39f77062 | 380 | *to = ptrace64 (PT_READ_I, PIDGET (inferior_ptid), from, 0, NULL); |
c906108c | 381 | else |
39f77062 KB |
382 | *to = ptrace32 (PT_READ_I, PIDGET (inferior_ptid), (int *)(long) from, |
383 | 0, NULL); | |
c906108c | 384 | |
7a78ae4e ND |
385 | return !errno; |
386 | } | |
387 | ||
388 | /* Copy LEN bytes to or from inferior's memory starting at MEMADDR | |
389 | to debugger memory starting at MYADDR. Copy to inferior if | |
390 | WRITE is nonzero. | |
391 | ||
392 | Returns the length copied, which is either the LEN argument or zero. | |
393 | This xfer function does not do partial moves, since child_ops | |
394 | doesn't allow memory operations to cross below us in the target stack | |
395 | anyway. */ | |
396 | ||
397 | int | |
398 | child_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, | |
d737ece6 PS |
399 | int write, struct mem_attrib *attrib, |
400 | struct target_ops *target) | |
7a78ae4e ND |
401 | { |
402 | /* Round starting address down to 32-bit word boundary. */ | |
403 | int mask = sizeof (int) - 1; | |
404 | CORE_ADDR addr = memaddr & ~(CORE_ADDR)mask; | |
405 | ||
406 | /* Round ending address up to 32-bit word boundary. */ | |
407 | int count = ((memaddr + len - addr + mask) & ~(CORE_ADDR)mask) | |
408 | / sizeof (int); | |
409 | ||
410 | /* Allocate word transfer buffer. */ | |
d33fc4e4 MS |
411 | /* FIXME (alloca): This code, cloned from infptrace.c, is unsafe |
412 | because it uses alloca to allocate a buffer of arbitrary size. | |
413 | For very large xfers, this could crash GDB's stack. */ | |
7a78ae4e ND |
414 | int *buf = (int *) alloca (count * sizeof (int)); |
415 | ||
416 | int arch64 = ARCH64 (); | |
417 | int i; | |
418 | ||
419 | if (!write) | |
c906108c | 420 | { |
7a78ae4e ND |
421 | /* Retrieve memory a word at a time. */ |
422 | for (i = 0; i < count; i++, addr += sizeof (int)) | |
423 | { | |
424 | if (!read_word (addr, buf + i, arch64)) | |
425 | return 0; | |
426 | QUIT; | |
427 | } | |
428 | ||
429 | /* Copy memory to supplied buffer. */ | |
430 | addr -= count * sizeof (int); | |
431 | memcpy (myaddr, (char *)buf + (memaddr - addr), len); | |
c906108c | 432 | } |
7a78ae4e ND |
433 | else |
434 | { | |
435 | /* Fetch leading memory needed for alignment. */ | |
436 | if (addr < memaddr) | |
437 | if (!read_word (addr, buf, arch64)) | |
438 | return 0; | |
439 | ||
440 | /* Fetch trailing memory needed for alignment. */ | |
441 | if (addr + count * sizeof (int) > memaddr + len) | |
442 | if (!read_word (addr, buf + count - 1, arch64)) | |
443 | return 0; | |
444 | ||
445 | /* Copy supplied data into memory buffer. */ | |
446 | memcpy ((char *)buf + (memaddr - addr), myaddr, len); | |
447 | ||
448 | /* Store memory one word at a time. */ | |
449 | for (i = 0, errno = 0; i < count; i++, addr += sizeof (int)) | |
450 | { | |
451 | if (arch64) | |
39f77062 | 452 | ptrace64 (PT_WRITE_D, PIDGET (inferior_ptid), addr, buf[i], NULL); |
7a78ae4e | 453 | else |
39f77062 | 454 | ptrace32 (PT_WRITE_D, PIDGET (inferior_ptid), (int *)(long) addr, |
7a78ae4e ND |
455 | buf[i], NULL); |
456 | ||
457 | if (errno) | |
458 | return 0; | |
459 | QUIT; | |
460 | } | |
461 | } | |
462 | ||
463 | return len; | |
c906108c SS |
464 | } |
465 | ||
466 | /* Execute one dummy breakpoint instruction. This way we give the kernel | |
467 | a chance to do some housekeeping and update inferior's internal data, | |
468 | including u_area. */ | |
469 | ||
470 | static void | |
7a78ae4e | 471 | exec_one_dummy_insn (void) |
c906108c SS |
472 | { |
473 | #define DUMMY_INSN_ADDR (TEXT_SEGMENT_BASE)+0x200 | |
474 | ||
c5aa993b | 475 | char shadow_contents[BREAKPOINT_MAX]; /* Stash old bkpt addr contents */ |
7a78ae4e | 476 | int ret, status, pid; |
c906108c SS |
477 | CORE_ADDR prev_pc; |
478 | ||
479 | /* We plant one dummy breakpoint into DUMMY_INSN_ADDR address. We | |
480 | assume that this address will never be executed again by the real | |
481 | code. */ | |
482 | ||
483 | target_insert_breakpoint (DUMMY_INSN_ADDR, shadow_contents); | |
484 | ||
c906108c SS |
485 | /* You might think this could be done with a single ptrace call, and |
486 | you'd be correct for just about every platform I've ever worked | |
487 | on. However, rs6000-ibm-aix4.1.3 seems to have screwed this up -- | |
488 | the inferior never hits the breakpoint (it's also worth noting | |
489 | powerpc-ibm-aix4.1.3 works correctly). */ | |
490 | prev_pc = read_pc (); | |
491 | write_pc (DUMMY_INSN_ADDR); | |
7a78ae4e | 492 | if (ARCH64 ()) |
39f77062 | 493 | ret = ptrace64 (PT_CONTINUE, PIDGET (inferior_ptid), 1, 0, NULL); |
7a78ae4e | 494 | else |
39f77062 | 495 | ret = ptrace32 (PT_CONTINUE, PIDGET (inferior_ptid), (int *)1, 0, NULL); |
c906108c | 496 | |
7a78ae4e | 497 | if (ret != 0) |
c906108c SS |
498 | perror ("pt_continue"); |
499 | ||
c5aa993b JM |
500 | do |
501 | { | |
502 | pid = wait (&status); | |
503 | } | |
39f77062 | 504 | while (pid != PIDGET (inferior_ptid)); |
c5aa993b | 505 | |
c906108c SS |
506 | write_pc (prev_pc); |
507 | target_remove_breakpoint (DUMMY_INSN_ADDR, shadow_contents); | |
508 | } | |
509 | ||
7a78ae4e ND |
510 | /* Fetch registers from the register section in core bfd. */ |
511 | ||
c906108c | 512 | static void |
7a78ae4e ND |
513 | fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, |
514 | int which, CORE_ADDR reg_addr) | |
c906108c | 515 | { |
7a78ae4e ND |
516 | CoreRegs *regs; |
517 | double *fprs; | |
518 | int arch64, i, size; | |
519 | void *gprs, *sprs[7]; | |
520 | ||
521 | if (which != 0) | |
c906108c | 522 | { |
7a78ae4e ND |
523 | fprintf_unfiltered |
524 | (gdb_stderr, | |
525 | "Gdb error: unknown parameter to fetch_core_registers().\n"); | |
526 | return; | |
c906108c SS |
527 | } |
528 | ||
7a78ae4e ND |
529 | arch64 = ARCH64 (); |
530 | regs = (CoreRegs *) core_reg_sect; | |
c906108c | 531 | |
7a78ae4e ND |
532 | /* Retrieve register pointers. */ |
533 | ||
534 | if (arch64) | |
535 | { | |
536 | gprs = regs->r64.gpr; | |
537 | fprs = regs->r64.fpr; | |
538 | sprs[0] = ®s->r64.iar; | |
539 | sprs[1] = ®s->r64.msr; | |
540 | sprs[2] = ®s->r64.cr; | |
541 | sprs[3] = ®s->r64.lr; | |
542 | sprs[4] = ®s->r64.ctr; | |
543 | sprs[5] = ®s->r64.xer; | |
544 | } | |
c906108c | 545 | else |
7a78ae4e ND |
546 | { |
547 | gprs = regs->r32.gpr; | |
548 | fprs = regs->r32.fpr; | |
549 | sprs[0] = ®s->r32.iar; | |
550 | sprs[1] = ®s->r32.msr; | |
551 | sprs[2] = ®s->r32.cr; | |
552 | sprs[3] = ®s->r32.lr; | |
553 | sprs[4] = ®s->r32.ctr; | |
554 | sprs[5] = ®s->r32.xer; | |
555 | sprs[6] = ®s->r32.mq; | |
556 | } | |
557 | ||
558 | /* Copy from pointers to registers[]. */ | |
559 | ||
560 | memcpy (registers, gprs, 32 * (arch64 ? 8 : 4)); | |
561 | memcpy (registers + REGISTER_BYTE (FP0_REGNUM), fprs, 32 * 8); | |
562 | for (i = FIRST_UISA_SP_REGNUM; i <= LAST_UISA_SP_REGNUM; i++) | |
563 | { | |
564 | size = REGISTER_RAW_SIZE (i); | |
565 | if (size) | |
566 | memcpy (registers + REGISTER_BYTE (i), | |
567 | sprs[i - FIRST_UISA_SP_REGNUM], size); | |
568 | } | |
c906108c SS |
569 | } |
570 | \f | |
7a78ae4e ND |
571 | |
572 | /* Copy information about text and data sections from LDI to VP for a 64-bit | |
573 | process if ARCH64 and for a 32-bit process otherwise. */ | |
574 | ||
575 | static void | |
576 | vmap_secs (struct vmap *vp, LdInfo *ldi, int arch64) | |
577 | { | |
578 | if (arch64) | |
579 | { | |
580 | vp->tstart = (CORE_ADDR) ldi->l64.ldinfo_textorg; | |
581 | vp->tend = vp->tstart + ldi->l64.ldinfo_textsize; | |
582 | vp->dstart = (CORE_ADDR) ldi->l64.ldinfo_dataorg; | |
583 | vp->dend = vp->dstart + ldi->l64.ldinfo_datasize; | |
584 | } | |
585 | else | |
586 | { | |
587 | vp->tstart = (unsigned long) ldi->l32.ldinfo_textorg; | |
588 | vp->tend = vp->tstart + ldi->l32.ldinfo_textsize; | |
589 | vp->dstart = (unsigned long) ldi->l32.ldinfo_dataorg; | |
590 | vp->dend = vp->dstart + ldi->l32.ldinfo_datasize; | |
591 | } | |
592 | ||
593 | /* The run time loader maps the file header in addition to the text | |
594 | section and returns a pointer to the header in ldinfo_textorg. | |
595 | Adjust the text start address to point to the real start address | |
596 | of the text section. */ | |
597 | vp->tstart += vp->toffs; | |
598 | } | |
599 | ||
c906108c SS |
600 | /* handle symbol translation on vmapping */ |
601 | ||
602 | static void | |
7a78ae4e | 603 | vmap_symtab (struct vmap *vp) |
c906108c SS |
604 | { |
605 | register struct objfile *objfile; | |
606 | struct section_offsets *new_offsets; | |
607 | int i; | |
c5aa993b | 608 | |
c906108c SS |
609 | objfile = vp->objfile; |
610 | if (objfile == NULL) | |
611 | { | |
612 | /* OK, it's not an objfile we opened ourselves. | |
c5aa993b JM |
613 | Currently, that can only happen with the exec file, so |
614 | relocate the symbols for the symfile. */ | |
c906108c SS |
615 | if (symfile_objfile == NULL) |
616 | return; | |
617 | objfile = symfile_objfile; | |
618 | } | |
63f58cc5 PS |
619 | else if (!vp->loaded) |
620 | /* If symbols are not yet loaded, offsets are not yet valid. */ | |
621 | return; | |
c906108c | 622 | |
d4f3574e | 623 | new_offsets = (struct section_offsets *) alloca (SIZEOF_SECTION_OFFSETS); |
c906108c SS |
624 | |
625 | for (i = 0; i < objfile->num_sections; ++i) | |
f0a58b0b | 626 | new_offsets->offsets[i] = ANOFFSET (objfile->section_offsets, i); |
c5aa993b | 627 | |
c906108c SS |
628 | /* The symbols in the object file are linked to the VMA of the section, |
629 | relocate them VMA relative. */ | |
f0a58b0b EZ |
630 | new_offsets->offsets[SECT_OFF_TEXT (objfile)] = vp->tstart - vp->tvma; |
631 | new_offsets->offsets[SECT_OFF_DATA (objfile)] = vp->dstart - vp->dvma; | |
632 | new_offsets->offsets[SECT_OFF_BSS (objfile)] = vp->dstart - vp->dvma; | |
c906108c SS |
633 | |
634 | objfile_relocate (objfile, new_offsets); | |
635 | } | |
636 | \f | |
637 | /* Add symbols for an objfile. */ | |
638 | ||
639 | static int | |
7a78ae4e | 640 | objfile_symbol_add (void *arg) |
c906108c SS |
641 | { |
642 | struct objfile *obj = (struct objfile *) arg; | |
643 | ||
2acceee2 | 644 | syms_from_objfile (obj, NULL, 0, 0); |
c906108c SS |
645 | new_symfile_objfile (obj, 0, 0); |
646 | return 1; | |
647 | } | |
648 | ||
63f58cc5 PS |
649 | /* Add symbols for a vmap. Return zero upon error. */ |
650 | ||
651 | int | |
652 | vmap_add_symbols (struct vmap *vp) | |
653 | { | |
654 | if (catch_errors (objfile_symbol_add, vp->objfile, | |
655 | "Error while reading shared library symbols:\n", | |
656 | RETURN_MASK_ALL)) | |
657 | { | |
658 | /* Note this is only done if symbol reading was successful. */ | |
659 | vp->loaded = 1; | |
660 | vmap_symtab (vp); | |
661 | return 1; | |
662 | } | |
663 | return 0; | |
664 | } | |
665 | ||
c906108c SS |
666 | /* Add a new vmap entry based on ldinfo() information. |
667 | ||
668 | If ldi->ldinfo_fd is not valid (e.g. this struct ld_info is from a | |
669 | core file), the caller should set it to -1, and we will open the file. | |
670 | ||
671 | Return the vmap new entry. */ | |
672 | ||
673 | static struct vmap * | |
7a78ae4e | 674 | add_vmap (LdInfo *ldi) |
c906108c SS |
675 | { |
676 | bfd *abfd, *last; | |
7a78ae4e | 677 | register char *mem, *objname, *filename; |
c906108c SS |
678 | struct objfile *obj; |
679 | struct vmap *vp; | |
7a78ae4e ND |
680 | int fd; |
681 | ARCH64_DECL (arch64); | |
c906108c SS |
682 | |
683 | /* This ldi structure was allocated using alloca() in | |
684 | xcoff_relocate_symtab(). Now we need to have persistent object | |
685 | and member names, so we should save them. */ | |
686 | ||
7a78ae4e ND |
687 | filename = LDI_FILENAME (ldi, arch64); |
688 | mem = filename + strlen (filename) + 1; | |
c906108c | 689 | mem = savestring (mem, strlen (mem)); |
7a78ae4e | 690 | objname = savestring (filename, strlen (filename)); |
c906108c | 691 | |
7a78ae4e ND |
692 | fd = LDI_FD (ldi, arch64); |
693 | if (fd < 0) | |
c906108c SS |
694 | /* Note that this opens it once for every member; a possible |
695 | enhancement would be to only open it once for every object. */ | |
696 | abfd = bfd_openr (objname, gnutarget); | |
697 | else | |
7a78ae4e | 698 | abfd = bfd_fdopenr (objname, gnutarget, fd); |
c906108c | 699 | if (!abfd) |
63f58cc5 PS |
700 | { |
701 | warning ("Could not open `%s' as an executable file: %s", | |
702 | objname, bfd_errmsg (bfd_get_error ())); | |
703 | return NULL; | |
704 | } | |
c906108c SS |
705 | |
706 | /* make sure we have an object file */ | |
707 | ||
708 | if (bfd_check_format (abfd, bfd_object)) | |
709 | vp = map_vmap (abfd, 0); | |
710 | ||
711 | else if (bfd_check_format (abfd, bfd_archive)) | |
712 | { | |
713 | last = 0; | |
714 | /* FIXME??? am I tossing BFDs? bfd? */ | |
715 | while ((last = bfd_openr_next_archived_file (abfd, last))) | |
716 | if (STREQ (mem, last->filename)) | |
717 | break; | |
718 | ||
719 | if (!last) | |
720 | { | |
63f58cc5 | 721 | warning ("\"%s\": member \"%s\" missing.", objname, mem); |
c906108c | 722 | bfd_close (abfd); |
63f58cc5 | 723 | return NULL; |
c906108c SS |
724 | } |
725 | ||
c5aa993b | 726 | if (!bfd_check_format (last, bfd_object)) |
c906108c | 727 | { |
63f58cc5 PS |
728 | warning ("\"%s\": member \"%s\" not in executable format: %s.", |
729 | objname, mem, bfd_errmsg (bfd_get_error ())); | |
730 | bfd_close (last); | |
731 | bfd_close (abfd); | |
732 | return NULL; | |
c906108c SS |
733 | } |
734 | ||
735 | vp = map_vmap (last, abfd); | |
736 | } | |
737 | else | |
738 | { | |
63f58cc5 PS |
739 | warning ("\"%s\": not in executable format: %s.", |
740 | objname, bfd_errmsg (bfd_get_error ())); | |
c906108c | 741 | bfd_close (abfd); |
63f58cc5 | 742 | return NULL; |
c906108c | 743 | } |
2df3850c | 744 | obj = allocate_objfile (vp->bfd, 0); |
c906108c SS |
745 | vp->objfile = obj; |
746 | ||
63f58cc5 PS |
747 | /* Always add symbols for the main objfile. */ |
748 | if (vp == vmap || auto_solib_add) | |
749 | vmap_add_symbols (vp); | |
c906108c SS |
750 | return vp; |
751 | } | |
752 | \f | |
753 | /* update VMAP info with ldinfo() information | |
754 | Input is ptr to ldinfo() results. */ | |
755 | ||
756 | static void | |
7a78ae4e | 757 | vmap_ldinfo (LdInfo *ldi) |
c906108c SS |
758 | { |
759 | struct stat ii, vi; | |
760 | register struct vmap *vp; | |
761 | int got_one, retried; | |
762 | int got_exec_file = 0; | |
7a78ae4e ND |
763 | uint next; |
764 | int arch64 = ARCH64 (); | |
c906108c SS |
765 | |
766 | /* For each *ldi, see if we have a corresponding *vp. | |
767 | If so, update the mapping, and symbol table. | |
768 | If not, add an entry and symbol table. */ | |
769 | ||
c5aa993b JM |
770 | do |
771 | { | |
7a78ae4e | 772 | char *name = LDI_FILENAME (ldi, arch64); |
c5aa993b | 773 | char *memb = name + strlen (name) + 1; |
7a78ae4e | 774 | int fd = LDI_FD (ldi, arch64); |
c5aa993b JM |
775 | |
776 | retried = 0; | |
777 | ||
7a78ae4e | 778 | if (fstat (fd, &ii) < 0) |
c5aa993b JM |
779 | { |
780 | /* The kernel sets ld_info to -1, if the process is still using the | |
781 | object, and the object is removed. Keep the symbol info for the | |
782 | removed object and issue a warning. */ | |
783 | warning ("%s (fd=%d) has disappeared, keeping its symbols", | |
7a78ae4e | 784 | name, fd); |
c906108c | 785 | continue; |
c5aa993b JM |
786 | } |
787 | retry: | |
788 | for (got_one = 0, vp = vmap; vp; vp = vp->nxt) | |
789 | { | |
790 | struct objfile *objfile; | |
c906108c | 791 | |
c5aa993b JM |
792 | /* First try to find a `vp', which is the same as in ldinfo. |
793 | If not the same, just continue and grep the next `vp'. If same, | |
794 | relocate its tstart, tend, dstart, dend values. If no such `vp' | |
795 | found, get out of this for loop, add this ldi entry as a new vmap | |
796 | (add_vmap) and come back, find its `vp' and so on... */ | |
797 | ||
798 | /* The filenames are not always sufficient to match on. */ | |
799 | ||
800 | if ((name[0] == '/' && !STREQ (name, vp->name)) | |
801 | || (memb[0] && !STREQ (memb, vp->member))) | |
c906108c | 802 | continue; |
c906108c | 803 | |
c5aa993b JM |
804 | /* See if we are referring to the same file. |
805 | We have to check objfile->obfd, symfile.c:reread_symbols might | |
806 | have updated the obfd after a change. */ | |
807 | objfile = vp->objfile == NULL ? symfile_objfile : vp->objfile; | |
808 | if (objfile == NULL | |
809 | || objfile->obfd == NULL | |
810 | || bfd_stat (objfile->obfd, &vi) < 0) | |
811 | { | |
812 | warning ("Unable to stat %s, keeping its symbols", name); | |
813 | continue; | |
814 | } | |
c906108c | 815 | |
c5aa993b JM |
816 | if (ii.st_dev != vi.st_dev || ii.st_ino != vi.st_ino) |
817 | continue; | |
c906108c | 818 | |
c5aa993b | 819 | if (!retried) |
7a78ae4e | 820 | close (fd); |
c906108c | 821 | |
c5aa993b | 822 | ++got_one; |
c906108c | 823 | |
c5aa993b | 824 | /* Found a corresponding VMAP. Remap! */ |
c906108c | 825 | |
7a78ae4e | 826 | vmap_secs (vp, ldi, arch64); |
c906108c | 827 | |
c5aa993b JM |
828 | /* The objfile is only NULL for the exec file. */ |
829 | if (vp->objfile == NULL) | |
830 | got_exec_file = 1; | |
c906108c | 831 | |
c5aa993b JM |
832 | /* relocate symbol table(s). */ |
833 | vmap_symtab (vp); | |
c906108c | 834 | |
c5aa993b JM |
835 | /* There may be more, so we don't break out of the loop. */ |
836 | } | |
837 | ||
838 | /* if there was no matching *vp, we must perforce create the sucker(s) */ | |
839 | if (!got_one && !retried) | |
840 | { | |
841 | add_vmap (ldi); | |
842 | ++retried; | |
843 | goto retry; | |
844 | } | |
845 | } | |
7a78ae4e ND |
846 | while ((next = LDI_NEXT (ldi, arch64)) |
847 | && (ldi = (void *) (next + (char *) ldi))); | |
c906108c SS |
848 | |
849 | /* If we don't find the symfile_objfile anywhere in the ldinfo, it | |
850 | is unlikely that the symbol file is relocated to the proper | |
851 | address. And we might have attached to a process which is | |
852 | running a different copy of the same executable. */ | |
853 | if (symfile_objfile != NULL && !got_exec_file) | |
854 | { | |
f5a96129 | 855 | warning ("Symbol file %s\nis not mapped; discarding it.\n\ |
c906108c SS |
856 | If in fact that file has symbols which the mapped files listed by\n\ |
857 | \"info files\" lack, you can load symbols with the \"symbol-file\" or\n\ | |
858 | \"add-symbol-file\" commands (note that you must take care of relocating\n\ | |
f5a96129 AC |
859 | symbols to the proper address).", |
860 | symfile_objfile->name); | |
c906108c SS |
861 | free_objfile (symfile_objfile); |
862 | symfile_objfile = NULL; | |
863 | } | |
864 | breakpoint_re_set (); | |
865 | } | |
866 | \f | |
867 | /* As well as symbol tables, exec_sections need relocation. After | |
868 | the inferior process' termination, there will be a relocated symbol | |
869 | table exist with no corresponding inferior process. At that time, we | |
870 | need to use `exec' bfd, rather than the inferior process's memory space | |
871 | to look up symbols. | |
872 | ||
873 | `exec_sections' need to be relocated only once, as long as the exec | |
874 | file remains unchanged. | |
c5aa993b | 875 | */ |
c906108c SS |
876 | |
877 | static void | |
7a78ae4e | 878 | vmap_exec (void) |
c906108c SS |
879 | { |
880 | static bfd *execbfd; | |
881 | int i; | |
882 | ||
883 | if (execbfd == exec_bfd) | |
884 | return; | |
885 | ||
886 | execbfd = exec_bfd; | |
887 | ||
888 | if (!vmap || !exec_ops.to_sections) | |
889 | error ("vmap_exec: vmap or exec_ops.to_sections == 0\n"); | |
890 | ||
c5aa993b | 891 | for (i = 0; &exec_ops.to_sections[i] < exec_ops.to_sections_end; i++) |
c906108c | 892 | { |
c5aa993b | 893 | if (STREQ (".text", exec_ops.to_sections[i].the_bfd_section->name)) |
c906108c SS |
894 | { |
895 | exec_ops.to_sections[i].addr += vmap->tstart - vmap->tvma; | |
896 | exec_ops.to_sections[i].endaddr += vmap->tstart - vmap->tvma; | |
897 | } | |
c5aa993b | 898 | else if (STREQ (".data", exec_ops.to_sections[i].the_bfd_section->name)) |
c906108c SS |
899 | { |
900 | exec_ops.to_sections[i].addr += vmap->dstart - vmap->dvma; | |
901 | exec_ops.to_sections[i].endaddr += vmap->dstart - vmap->dvma; | |
902 | } | |
c5aa993b | 903 | else if (STREQ (".bss", exec_ops.to_sections[i].the_bfd_section->name)) |
c906108c SS |
904 | { |
905 | exec_ops.to_sections[i].addr += vmap->dstart - vmap->dvma; | |
906 | exec_ops.to_sections[i].endaddr += vmap->dstart - vmap->dvma; | |
907 | } | |
908 | } | |
909 | } | |
7a78ae4e ND |
910 | |
911 | /* Set the current architecture from the host running GDB. Called when | |
912 | starting a child process. */ | |
913 | ||
914 | static void | |
915 | set_host_arch (int pid) | |
916 | { | |
917 | enum bfd_architecture arch; | |
918 | unsigned long mach; | |
919 | bfd abfd; | |
920 | struct gdbarch_info info; | |
921 | ||
922 | if (__power_rs ()) | |
923 | { | |
924 | arch = bfd_arch_rs6000; | |
925 | mach = bfd_mach_rs6k; | |
926 | } | |
927 | else | |
928 | { | |
929 | arch = bfd_arch_powerpc; | |
930 | mach = bfd_mach_ppc; | |
931 | } | |
19caaa45 PS |
932 | |
933 | /* FIXME: schauer/2002-02-25: | |
934 | We don't know if we are executing a 32 or 64 bit executable, | |
935 | and have no way to pass the proper word size to rs6000_gdbarch_init. | |
936 | So we have to avoid switching to a new architecture, if the architecture | |
937 | matches already. | |
938 | Blindly calling rs6000_gdbarch_init used to work in older versions of | |
939 | GDB, as rs6000_gdbarch_init incorrectly used the previous tdep to | |
940 | determine the wordsize. */ | |
941 | if (exec_bfd) | |
942 | { | |
943 | const struct bfd_arch_info *exec_bfd_arch_info; | |
944 | ||
945 | exec_bfd_arch_info = bfd_get_arch_info (exec_bfd); | |
946 | if (arch == exec_bfd_arch_info->arch) | |
947 | return; | |
948 | } | |
949 | ||
7a78ae4e ND |
950 | bfd_default_set_arch_mach (&abfd, arch, mach); |
951 | ||
fb6ecb0f | 952 | gdbarch_info_init (&info); |
7a78ae4e ND |
953 | info.bfd_arch_info = bfd_get_arch_info (&abfd); |
954 | ||
16f33e29 AC |
955 | if (!gdbarch_update_p (info)) |
956 | { | |
8e65ff28 AC |
957 | internal_error (__FILE__, __LINE__, |
958 | "set_host_arch: failed to select architecture"); | |
16f33e29 | 959 | } |
7a78ae4e ND |
960 | } |
961 | ||
c906108c | 962 | \f |
c5aa993b | 963 | /* xcoff_relocate_symtab - hook for symbol table relocation. |
c906108c SS |
964 | also reads shared libraries.. */ |
965 | ||
966 | void | |
7a78ae4e | 967 | xcoff_relocate_symtab (unsigned int pid) |
c906108c | 968 | { |
c18e0d23 | 969 | int load_segs = 64; /* number of load segments */ |
380b774b | 970 | int rc; |
7a78ae4e ND |
971 | LdInfo *ldi = NULL; |
972 | int arch64 = ARCH64 (); | |
973 | int ldisize = arch64 ? sizeof (ldi->l64) : sizeof (ldi->l32); | |
974 | int size; | |
c906108c | 975 | |
c18e0d23 GM |
976 | do |
977 | { | |
7a78ae4e | 978 | size = load_segs * ldisize; |
3a84337c | 979 | ldi = (void *) xrealloc (ldi, size); |
c906108c | 980 | |
7a78ae4e | 981 | #if 0 |
380b774b GM |
982 | /* According to my humble theory, AIX has some timing problems and |
983 | when the user stack grows, kernel doesn't update stack info in time | |
984 | and ptrace calls step on user stack. That is why we sleep here a | |
985 | little, and give kernel to update its internals. */ | |
380b774b | 986 | usleep (36000); |
7a78ae4e ND |
987 | #endif |
988 | ||
989 | if (arch64) | |
990 | rc = ptrace64 (PT_LDINFO, pid, (unsigned long) ldi, size, NULL); | |
991 | else | |
992 | rc = ptrace32 (PT_LDINFO, pid, (int *) ldi, size, NULL); | |
c906108c | 993 | |
c18e0d23 GM |
994 | if (rc == -1) |
995 | { | |
380b774b GM |
996 | if (errno == ENOMEM) |
997 | load_segs *= 2; | |
998 | else | |
999 | perror_with_name ("ptrace ldinfo"); | |
c18e0d23 GM |
1000 | } |
1001 | else | |
1002 | { | |
380b774b GM |
1003 | vmap_ldinfo (ldi); |
1004 | vmap_exec (); /* relocate the exec and core sections as well. */ | |
c18e0d23 GM |
1005 | } |
1006 | } while (rc == -1); | |
380b774b | 1007 | if (ldi) |
b8c9b27d | 1008 | xfree (ldi); |
c906108c SS |
1009 | } |
1010 | \f | |
1011 | /* Core file stuff. */ | |
1012 | ||
1013 | /* Relocate symtabs and read in shared library info, based on symbols | |
1014 | from the core file. */ | |
1015 | ||
1016 | void | |
7a78ae4e | 1017 | xcoff_relocate_core (struct target_ops *target) |
c906108c | 1018 | { |
c906108c SS |
1019 | sec_ptr ldinfo_sec; |
1020 | int offset = 0; | |
7a78ae4e | 1021 | LdInfo *ldi; |
c906108c | 1022 | struct vmap *vp; |
7a78ae4e ND |
1023 | int arch64 = ARCH64 (); |
1024 | ||
1025 | /* Size of a struct ld_info except for the variable-length filename. */ | |
1026 | int nonfilesz = (int)LDI_FILENAME ((LdInfo *)0, arch64); | |
c906108c SS |
1027 | |
1028 | /* Allocated size of buffer. */ | |
7a78ae4e | 1029 | int buffer_size = nonfilesz; |
c906108c SS |
1030 | char *buffer = xmalloc (buffer_size); |
1031 | struct cleanup *old = make_cleanup (free_current_contents, &buffer); | |
c5aa993b | 1032 | |
c906108c SS |
1033 | ldinfo_sec = bfd_get_section_by_name (core_bfd, ".ldinfo"); |
1034 | if (ldinfo_sec == NULL) | |
1035 | { | |
1036 | bfd_err: | |
1037 | fprintf_filtered (gdb_stderr, "Couldn't get ldinfo from core file: %s\n", | |
1038 | bfd_errmsg (bfd_get_error ())); | |
1039 | do_cleanups (old); | |
1040 | return; | |
1041 | } | |
1042 | do | |
1043 | { | |
1044 | int i; | |
1045 | int names_found = 0; | |
1046 | ||
1047 | /* Read in everything but the name. */ | |
1048 | if (bfd_get_section_contents (core_bfd, ldinfo_sec, buffer, | |
7a78ae4e | 1049 | offset, nonfilesz) == 0) |
c906108c SS |
1050 | goto bfd_err; |
1051 | ||
1052 | /* Now the name. */ | |
7a78ae4e | 1053 | i = nonfilesz; |
c906108c SS |
1054 | do |
1055 | { | |
1056 | if (i == buffer_size) | |
1057 | { | |
1058 | buffer_size *= 2; | |
1059 | buffer = xrealloc (buffer, buffer_size); | |
1060 | } | |
1061 | if (bfd_get_section_contents (core_bfd, ldinfo_sec, &buffer[i], | |
1062 | offset + i, 1) == 0) | |
1063 | goto bfd_err; | |
1064 | if (buffer[i++] == '\0') | |
1065 | ++names_found; | |
c5aa993b JM |
1066 | } |
1067 | while (names_found < 2); | |
c906108c | 1068 | |
7a78ae4e | 1069 | ldi = (LdInfo *) buffer; |
c906108c SS |
1070 | |
1071 | /* Can't use a file descriptor from the core file; need to open it. */ | |
7a78ae4e ND |
1072 | if (arch64) |
1073 | ldi->l64.ldinfo_fd = -1; | |
1074 | else | |
1075 | ldi->l32.ldinfo_fd = -1; | |
c5aa993b | 1076 | |
c906108c | 1077 | /* The first ldinfo is for the exec file, allocated elsewhere. */ |
63f58cc5 | 1078 | if (offset == 0 && vmap != NULL) |
c906108c SS |
1079 | vp = vmap; |
1080 | else | |
7a78ae4e | 1081 | vp = add_vmap (ldi); |
c906108c | 1082 | |
63f58cc5 | 1083 | /* Process next shared library upon error. */ |
7a78ae4e | 1084 | offset += LDI_NEXT (ldi, arch64); |
63f58cc5 PS |
1085 | if (vp == NULL) |
1086 | continue; | |
1087 | ||
7a78ae4e | 1088 | vmap_secs (vp, ldi, arch64); |
c906108c SS |
1089 | |
1090 | /* Unless this is the exec file, | |
c5aa993b | 1091 | add our sections to the section table for the core target. */ |
c906108c SS |
1092 | if (vp != vmap) |
1093 | { | |
c906108c | 1094 | struct section_table *stp; |
6426a772 JM |
1095 | |
1096 | target_resize_to_sections (target, 2); | |
c906108c SS |
1097 | stp = target->to_sections_end - 2; |
1098 | ||
1099 | stp->bfd = vp->bfd; | |
1100 | stp->the_bfd_section = bfd_get_section_by_name (stp->bfd, ".text"); | |
1101 | stp->addr = vp->tstart; | |
1102 | stp->endaddr = vp->tend; | |
1103 | stp++; | |
c5aa993b | 1104 | |
c906108c SS |
1105 | stp->bfd = vp->bfd; |
1106 | stp->the_bfd_section = bfd_get_section_by_name (stp->bfd, ".data"); | |
1107 | stp->addr = vp->dstart; | |
1108 | stp->endaddr = vp->dend; | |
1109 | } | |
1110 | ||
1111 | vmap_symtab (vp); | |
c5aa993b | 1112 | } |
7a78ae4e | 1113 | while (LDI_NEXT (ldi, arch64) != 0); |
c906108c SS |
1114 | vmap_exec (); |
1115 | breakpoint_re_set (); | |
1116 | do_cleanups (old); | |
1117 | } | |
1118 | ||
1119 | int | |
7a78ae4e | 1120 | kernel_u_size (void) |
c906108c SS |
1121 | { |
1122 | return (sizeof (struct user)); | |
1123 | } | |
1124 | \f | |
1125 | /* Under AIX, we have to pass the correct TOC pointer to a function | |
1126 | when calling functions in the inferior. | |
1127 | We try to find the relative toc offset of the objfile containing PC | |
1128 | and add the current load address of the data segment from the vmap. */ | |
1129 | ||
1130 | static CORE_ADDR | |
7a78ae4e | 1131 | find_toc_address (CORE_ADDR pc) |
c906108c SS |
1132 | { |
1133 | struct vmap *vp; | |
7a78ae4e | 1134 | extern CORE_ADDR get_toc_offset (struct objfile *); /* xcoffread.c */ |
c906108c SS |
1135 | |
1136 | for (vp = vmap; vp; vp = vp->nxt) | |
1137 | { | |
1138 | if (pc >= vp->tstart && pc < vp->tend) | |
1139 | { | |
1140 | /* vp->objfile is only NULL for the exec file. */ | |
1141 | return vp->dstart + get_toc_offset (vp->objfile == NULL | |
1142 | ? symfile_objfile | |
1143 | : vp->objfile); | |
1144 | } | |
1145 | } | |
1146 | error ("Unable to find TOC entry for pc 0x%x\n", pc); | |
1147 | } | |
1148 | \f | |
1149 | /* Register that we are able to handle rs6000 core file formats. */ | |
1150 | ||
1151 | static struct core_fns rs6000_core_fns = | |
1152 | { | |
7a78ae4e | 1153 | bfd_target_xcoff_flavour, /* core_flavour */ |
2acceee2 JM |
1154 | default_check_format, /* check_format */ |
1155 | default_core_sniffer, /* core_sniffer */ | |
1156 | fetch_core_registers, /* core_read_registers */ | |
1157 | NULL /* next */ | |
c906108c SS |
1158 | }; |
1159 | ||
1160 | void | |
7a78ae4e | 1161 | _initialize_core_rs6000 (void) |
c906108c SS |
1162 | { |
1163 | /* Initialize hook in rs6000-tdep.c for determining the TOC address when | |
1164 | calling functions in the inferior. */ | |
7a78ae4e ND |
1165 | rs6000_find_toc_address_hook = find_toc_address; |
1166 | ||
1167 | /* Initialize hook in rs6000-tdep.c to set the current architecture when | |
1168 | starting a child process. */ | |
1169 | rs6000_set_host_arch_hook = set_host_arch; | |
c906108c | 1170 | |
c906108c SS |
1171 | add_core_fns (&rs6000_core_fns); |
1172 | } |