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