Commit | Line | Data |
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c906108c | 1 | /* IBM RS/6000 native-dependent code for GDB, the GNU debugger. |
4646aa9d AC |
2 | |
3 | Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995, 1996, | |
7aea86e6 AC |
4 | 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free Software |
5 | Foundation, Inc. | |
c906108c | 6 | |
c5aa993b | 7 | This file is part of GDB. |
c906108c | 8 | |
c5aa993b JM |
9 | This program is free software; you can redistribute it and/or modify |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 2 of the License, or | |
12 | (at your option) any later version. | |
c906108c | 13 | |
c5aa993b JM |
14 | This program is distributed in the hope that it will be useful, |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
c906108c | 18 | |
c5aa993b JM |
19 | You should have received a copy of the GNU General Public License |
20 | along with this program; if not, write to the Free Software | |
21 | Foundation, Inc., 59 Temple Place - Suite 330, | |
22 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
23 | |
24 | #include "defs.h" | |
25 | #include "inferior.h" | |
26 | #include "target.h" | |
27 | #include "gdbcore.h" | |
28 | #include "xcoffsolib.h" | |
29 | #include "symfile.h" | |
30 | #include "objfiles.h" | |
c5aa993b | 31 | #include "libbfd.h" /* For bfd_cache_lookup (FIXME) */ |
c906108c SS |
32 | #include "bfd.h" |
33 | #include "gdb-stabs.h" | |
4e052eda | 34 | #include "regcache.h" |
19caaa45 | 35 | #include "arch-utils.h" |
dd7be90a | 36 | #include "language.h" /* for local_hex_string(). */ |
11bf77db | 37 | #include "ppc-tdep.h" |
4646aa9d | 38 | #include "exec.h" |
c906108c SS |
39 | |
40 | #include <sys/ptrace.h> | |
41 | #include <sys/reg.h> | |
42 | ||
43 | #include <sys/param.h> | |
44 | #include <sys/dir.h> | |
45 | #include <sys/user.h> | |
46 | #include <signal.h> | |
47 | #include <sys/ioctl.h> | |
48 | #include <fcntl.h> | |
7a78ae4e | 49 | #include <errno.h> |
c906108c SS |
50 | |
51 | #include <a.out.h> | |
52 | #include <sys/file.h> | |
53 | #include "gdb_stat.h" | |
54 | #include <sys/core.h> | |
7a78ae4e ND |
55 | #define __LDINFO_PTRACE32__ /* for __ld_info32 */ |
56 | #define __LDINFO_PTRACE64__ /* for __ld_info64 */ | |
c906108c | 57 | #include <sys/ldr.h> |
7a78ae4e | 58 | #include <sys/systemcfg.h> |
c906108c | 59 | |
7a78ae4e ND |
60 | /* On AIX4.3+, sys/ldr.h provides different versions of struct ld_info for |
61 | debugging 32-bit and 64-bit processes. Define a typedef and macros for | |
62 | accessing fields in the appropriate structures. */ | |
63 | ||
64 | /* In 32-bit compilation mode (which is the only mode from which ptrace() | |
65 | works on 4.3), __ld_info32 is #defined as equivalent to ld_info. */ | |
66 | ||
67 | #ifdef __ld_info32 | |
68 | # define ARCH3264 | |
69 | #endif | |
70 | ||
71 | /* Return whether the current architecture is 64-bit. */ | |
72 | ||
73 | #ifndef ARCH3264 | |
74 | # define ARCH64() 0 | |
75 | #else | |
12c266ea | 76 | # define ARCH64() (DEPRECATED_REGISTER_RAW_SIZE (0) == 8) |
7a78ae4e ND |
77 | #endif |
78 | ||
79 | /* Union of 32-bit and 64-bit ".reg" core file sections. */ | |
80 | ||
81 | typedef union { | |
82 | #ifdef ARCH3264 | |
83 | struct __context64 r64; | |
84 | #else | |
85 | struct mstsave r64; | |
86 | #endif | |
87 | struct mstsave r32; | |
88 | } CoreRegs; | |
89 | ||
90 | /* Union of 32-bit and 64-bit versions of ld_info. */ | |
91 | ||
92 | typedef union { | |
93 | #ifndef ARCH3264 | |
94 | struct ld_info l32; | |
95 | struct ld_info l64; | |
96 | #else | |
97 | struct __ld_info32 l32; | |
98 | struct __ld_info64 l64; | |
99 | #endif | |
100 | } LdInfo; | |
101 | ||
102 | /* If compiling with 32-bit and 64-bit debugging capability (e.g. AIX 4.x), | |
103 | declare and initialize a variable named VAR suitable for use as the arch64 | |
104 | parameter to the various LDI_*() macros. */ | |
105 | ||
106 | #ifndef ARCH3264 | |
107 | # define ARCH64_DECL(var) | |
108 | #else | |
109 | # define ARCH64_DECL(var) int var = ARCH64 () | |
110 | #endif | |
111 | ||
112 | /* Return LDI's FIELD for a 64-bit process if ARCH64 and for a 32-bit process | |
113 | otherwise. This technique only works for FIELDs with the same data type in | |
114 | 32-bit and 64-bit versions of ld_info. */ | |
115 | ||
116 | #ifndef ARCH3264 | |
117 | # define LDI_FIELD(ldi, arch64, field) (ldi)->l32.ldinfo_##field | |
118 | #else | |
119 | # define LDI_FIELD(ldi, arch64, field) \ | |
120 | (arch64 ? (ldi)->l64.ldinfo_##field : (ldi)->l32.ldinfo_##field) | |
121 | #endif | |
122 | ||
123 | /* Return various LDI fields for a 64-bit process if ARCH64 and for a 32-bit | |
124 | process otherwise. */ | |
125 | ||
126 | #define LDI_NEXT(ldi, arch64) LDI_FIELD(ldi, arch64, next) | |
127 | #define LDI_FD(ldi, arch64) LDI_FIELD(ldi, arch64, fd) | |
128 | #define LDI_FILENAME(ldi, arch64) LDI_FIELD(ldi, arch64, filename) | |
c906108c | 129 | |
a14ed312 | 130 | extern struct vmap *map_vmap (bfd * bf, bfd * arch); |
c906108c | 131 | |
a14ed312 | 132 | static void vmap_exec (void); |
c906108c | 133 | |
7a78ae4e | 134 | static void vmap_ldinfo (LdInfo *); |
c906108c | 135 | |
7a78ae4e | 136 | static struct vmap *add_vmap (LdInfo *); |
c906108c | 137 | |
7a78ae4e | 138 | static int objfile_symbol_add (void *); |
c906108c | 139 | |
a14ed312 | 140 | static void vmap_symtab (struct vmap *); |
c906108c | 141 | |
a14ed312 | 142 | static void fetch_core_registers (char *, unsigned int, int, CORE_ADDR); |
c906108c | 143 | |
a14ed312 | 144 | static void exec_one_dummy_insn (void); |
c906108c | 145 | |
570b8f7c | 146 | extern void fixup_breakpoints (CORE_ADDR low, CORE_ADDR high, CORE_ADDR delta); |
c906108c | 147 | |
dd7be90a KB |
148 | /* Given REGNO, a gdb register number, return the corresponding |
149 | number suitable for use as a ptrace() parameter. Return -1 if | |
150 | there's no suitable mapping. Also, set the int pointed to by | |
151 | ISFLOAT to indicate whether REGNO is a floating point register. */ | |
c906108c | 152 | |
dd7be90a KB |
153 | static int |
154 | regmap (int regno, int *isfloat) | |
c5aa993b | 155 | { |
dd7be90a KB |
156 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); |
157 | ||
158 | *isfloat = 0; | |
8bf659e8 JB |
159 | if (tdep->ppc_gp0_regnum <= regno |
160 | && regno < tdep->ppc_gp0_regnum + ppc_num_gprs) | |
dd7be90a | 161 | return regno; |
7bcda025 | 162 | else if (tdep->ppc_fp0_regnum <= regno |
366f009f | 163 | && regno < tdep->ppc_fp0_regnum + ppc_num_fprs) |
dd7be90a KB |
164 | { |
165 | *isfloat = 1; | |
366f009f | 166 | return regno - tdep->ppc_fp0_regnum + FPR0; |
dd7be90a KB |
167 | } |
168 | else if (regno == PC_REGNUM) | |
169 | return IAR; | |
170 | else if (regno == tdep->ppc_ps_regnum) | |
171 | return MSR; | |
172 | else if (regno == tdep->ppc_cr_regnum) | |
173 | return CR; | |
174 | else if (regno == tdep->ppc_lr_regnum) | |
175 | return LR; | |
176 | else if (regno == tdep->ppc_ctr_regnum) | |
177 | return CTR; | |
178 | else if (regno == tdep->ppc_xer_regnum) | |
179 | return XER; | |
7bcda025 | 180 | else if (regno == tdep->ppc_fpscr_regnum) |
0e061eef | 181 | return FPSCR; |
dd7be90a KB |
182 | else if (tdep->ppc_mq_regnum >= 0 && regno == tdep->ppc_mq_regnum) |
183 | return MQ; | |
184 | else | |
185 | return -1; | |
186 | } | |
c906108c | 187 | |
7a78ae4e | 188 | /* Call ptrace(REQ, ID, ADDR, DATA, BUF). */ |
c906108c | 189 | |
7a78ae4e | 190 | static int |
8b5790f2 | 191 | rs6000_ptrace32 (int req, int id, int *addr, int data, int *buf) |
7a78ae4e ND |
192 | { |
193 | int ret = ptrace (req, id, (int *)addr, data, buf); | |
194 | #if 0 | |
8b5790f2 | 195 | printf ("rs6000_ptrace32 (%d, %d, 0x%x, %08x, 0x%x) = 0x%x\n", |
7a78ae4e ND |
196 | req, id, (unsigned int)addr, data, (unsigned int)buf, ret); |
197 | #endif | |
198 | return ret; | |
199 | } | |
c906108c | 200 | |
7a78ae4e | 201 | /* Call ptracex(REQ, ID, ADDR, DATA, BUF). */ |
c906108c | 202 | |
7a78ae4e | 203 | static int |
8b5790f2 | 204 | rs6000_ptrace64 (int req, int id, long long addr, int data, int *buf) |
7a78ae4e ND |
205 | { |
206 | #ifdef ARCH3264 | |
207 | int ret = ptracex (req, id, addr, data, buf); | |
208 | #else | |
209 | int ret = 0; | |
210 | #endif | |
211 | #if 0 | |
8b5790f2 | 212 | printf ("rs6000_ptrace64 (%d, %d, 0x%llx, %08x, 0x%x) = 0x%x\n", |
7a78ae4e ND |
213 | req, id, addr, data, (unsigned int)buf, ret); |
214 | #endif | |
215 | return ret; | |
216 | } | |
c906108c | 217 | |
7a78ae4e | 218 | /* Fetch register REGNO from the inferior. */ |
c906108c | 219 | |
7a78ae4e ND |
220 | static void |
221 | fetch_register (int regno) | |
222 | { | |
d9d9c31f | 223 | int addr[MAX_REGISTER_SIZE]; |
dd7be90a | 224 | int nr, isfloat; |
c906108c | 225 | |
7a78ae4e ND |
226 | /* Retrieved values may be -1, so infer errors from errno. */ |
227 | errno = 0; | |
c906108c | 228 | |
dd7be90a KB |
229 | nr = regmap (regno, &isfloat); |
230 | ||
7a78ae4e | 231 | /* Floating-point registers. */ |
dd7be90a KB |
232 | if (isfloat) |
233 | rs6000_ptrace32 (PT_READ_FPR, PIDGET (inferior_ptid), addr, nr, 0); | |
c906108c | 234 | |
7a78ae4e | 235 | /* Bogus register number. */ |
dd7be90a | 236 | else if (nr < 0) |
2a18e3d9 EZ |
237 | { |
238 | if (regno >= NUM_REGS) | |
239 | fprintf_unfiltered (gdb_stderr, | |
240 | "gdb error: register no %d not implemented.\n", | |
241 | regno); | |
dd7be90a | 242 | return; |
2a18e3d9 | 243 | } |
c906108c | 244 | |
7a78ae4e ND |
245 | /* Fixed-point registers. */ |
246 | else | |
247 | { | |
7a78ae4e | 248 | if (!ARCH64 ()) |
8b5790f2 | 249 | *addr = rs6000_ptrace32 (PT_READ_GPR, PIDGET (inferior_ptid), (int *)nr, 0, 0); |
7a78ae4e ND |
250 | else |
251 | { | |
252 | /* PT_READ_GPR requires the buffer parameter to point to long long, | |
253 | even if the register is really only 32 bits. */ | |
254 | long long buf; | |
8b5790f2 | 255 | rs6000_ptrace64 (PT_READ_GPR, PIDGET (inferior_ptid), nr, 0, (int *)&buf); |
12c266ea | 256 | if (DEPRECATED_REGISTER_RAW_SIZE (regno) == 8) |
7a78ae4e ND |
257 | memcpy (addr, &buf, 8); |
258 | else | |
259 | *addr = buf; | |
260 | } | |
261 | } | |
262 | ||
263 | if (!errno) | |
11bf77db | 264 | supply_register (regno, (char *) addr); |
7a78ae4e ND |
265 | else |
266 | { | |
267 | #if 0 | |
268 | /* FIXME: this happens 3 times at the start of each 64-bit program. */ | |
269 | perror ("ptrace read"); | |
270 | #endif | |
271 | errno = 0; | |
272 | } | |
c906108c SS |
273 | } |
274 | ||
7a78ae4e | 275 | /* Store register REGNO back into the inferior. */ |
c906108c | 276 | |
7a78ae4e ND |
277 | static void |
278 | store_register (int regno) | |
c906108c | 279 | { |
d9d9c31f | 280 | int addr[MAX_REGISTER_SIZE]; |
dd7be90a | 281 | int nr, isfloat; |
c906108c | 282 | |
11bf77db KB |
283 | /* Fetch the register's value from the register cache. */ |
284 | regcache_collect (regno, addr); | |
285 | ||
7a78ae4e | 286 | /* -1 can be a successful return value, so infer errors from errno. */ |
c906108c SS |
287 | errno = 0; |
288 | ||
dd7be90a KB |
289 | nr = regmap (regno, &isfloat); |
290 | ||
7a78ae4e | 291 | /* Floating-point registers. */ |
dd7be90a KB |
292 | if (isfloat) |
293 | rs6000_ptrace32 (PT_WRITE_FPR, PIDGET (inferior_ptid), addr, nr, 0); | |
c906108c | 294 | |
7a78ae4e | 295 | /* Bogus register number. */ |
dd7be90a | 296 | else if (nr < 0) |
7a78ae4e ND |
297 | { |
298 | if (regno >= NUM_REGS) | |
299 | fprintf_unfiltered (gdb_stderr, | |
300 | "gdb error: register no %d not implemented.\n", | |
301 | regno); | |
302 | } | |
c906108c | 303 | |
7a78ae4e ND |
304 | /* Fixed-point registers. */ |
305 | else | |
306 | { | |
307 | if (regno == SP_REGNUM) | |
308 | /* Execute one dummy instruction (which is a breakpoint) in inferior | |
309 | process to give kernel a chance to do internal housekeeping. | |
310 | Otherwise the following ptrace(2) calls will mess up user stack | |
311 | since kernel will get confused about the bottom of the stack | |
312 | (%sp). */ | |
313 | exec_one_dummy_insn (); | |
c906108c | 314 | |
11bf77db KB |
315 | /* The PT_WRITE_GPR operation is rather odd. For 32-bit inferiors, |
316 | the register's value is passed by value, but for 64-bit inferiors, | |
317 | the address of a buffer containing the value is passed. */ | |
7a78ae4e | 318 | if (!ARCH64 ()) |
8b5790f2 | 319 | rs6000_ptrace32 (PT_WRITE_GPR, PIDGET (inferior_ptid), (int *)nr, *addr, 0); |
7a78ae4e | 320 | else |
c906108c | 321 | { |
7a78ae4e ND |
322 | /* PT_WRITE_GPR requires the buffer parameter to point to an 8-byte |
323 | area, even if the register is really only 32 bits. */ | |
324 | long long buf; | |
12c266ea | 325 | if (DEPRECATED_REGISTER_RAW_SIZE (regno) == 8) |
7a78ae4e ND |
326 | memcpy (&buf, addr, 8); |
327 | else | |
328 | buf = *addr; | |
8b5790f2 | 329 | rs6000_ptrace64 (PT_WRITE_GPR, PIDGET (inferior_ptid), nr, 0, (int *)&buf); |
c906108c SS |
330 | } |
331 | } | |
332 | ||
7a78ae4e | 333 | if (errno) |
c906108c | 334 | { |
7a78ae4e ND |
335 | perror ("ptrace write"); |
336 | errno = 0; | |
c906108c | 337 | } |
7a78ae4e | 338 | } |
c906108c | 339 | |
7a78ae4e ND |
340 | /* Read from the inferior all registers if REGNO == -1 and just register |
341 | REGNO otherwise. */ | |
c906108c | 342 | |
7a78ae4e ND |
343 | void |
344 | fetch_inferior_registers (int regno) | |
345 | { | |
346 | if (regno != -1) | |
347 | fetch_register (regno); | |
348 | ||
349 | else | |
c906108c | 350 | { |
dd7be90a | 351 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); |
7a78ae4e | 352 | |
dd7be90a KB |
353 | /* Read 32 general purpose registers. */ |
354 | for (regno = tdep->ppc_gp0_regnum; | |
8bf659e8 | 355 | regno < tdep->ppc_gp0_regnum + ppc_num_gprs; |
dd7be90a KB |
356 | regno++) |
357 | { | |
358 | fetch_register (regno); | |
359 | } | |
360 | ||
361 | /* Read general purpose floating point registers. */ | |
7bcda025 JB |
362 | for (regno = 0; regno < ppc_num_fprs; regno++) |
363 | fetch_register (tdep->ppc_fp0_regnum + regno); | |
7a78ae4e | 364 | |
dd7be90a KB |
365 | /* Read special registers. */ |
366 | fetch_register (PC_REGNUM); | |
367 | fetch_register (tdep->ppc_ps_regnum); | |
368 | fetch_register (tdep->ppc_cr_regnum); | |
369 | fetch_register (tdep->ppc_lr_regnum); | |
370 | fetch_register (tdep->ppc_ctr_regnum); | |
371 | fetch_register (tdep->ppc_xer_regnum); | |
7bcda025 | 372 | fetch_register (tdep->ppc_fpscr_regnum); |
dd7be90a KB |
373 | if (tdep->ppc_mq_regnum >= 0) |
374 | fetch_register (tdep->ppc_mq_regnum); | |
c906108c | 375 | } |
7a78ae4e | 376 | } |
c906108c | 377 | |
7a78ae4e ND |
378 | /* Store our register values back into the inferior. |
379 | If REGNO is -1, do this for all registers. | |
380 | Otherwise, REGNO specifies which register (so we can save time). */ | |
381 | ||
382 | void | |
383 | store_inferior_registers (int regno) | |
384 | { | |
385 | if (regno != -1) | |
386 | store_register (regno); | |
387 | ||
388 | else | |
f6077098 | 389 | { |
dd7be90a KB |
390 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); |
391 | ||
392 | /* Write general purpose registers first. */ | |
393 | for (regno = tdep->ppc_gp0_regnum; | |
8bf659e8 | 394 | regno < tdep->ppc_gp0_regnum + ppc_num_gprs; |
dd7be90a KB |
395 | regno++) |
396 | { | |
397 | store_register (regno); | |
398 | } | |
7a78ae4e | 399 | |
dd7be90a | 400 | /* Write floating point registers. */ |
7bcda025 JB |
401 | for (regno = 0; regno < ppc_num_fprs; regno++) |
402 | store_register (tdep->ppc_fp0_regnum + regno); | |
7a78ae4e | 403 | |
dd7be90a KB |
404 | /* Write special registers. */ |
405 | store_register (PC_REGNUM); | |
406 | store_register (tdep->ppc_ps_regnum); | |
407 | store_register (tdep->ppc_cr_regnum); | |
408 | store_register (tdep->ppc_lr_regnum); | |
409 | store_register (tdep->ppc_ctr_regnum); | |
410 | store_register (tdep->ppc_xer_regnum); | |
7bcda025 | 411 | store_register (tdep->ppc_fpscr_regnum); |
dd7be90a KB |
412 | if (tdep->ppc_mq_regnum >= 0) |
413 | store_register (tdep->ppc_mq_regnum); | |
f6077098 | 414 | } |
7a78ae4e | 415 | } |
f6077098 | 416 | |
7a78ae4e ND |
417 | /* Store in *TO the 32-bit word at 32-bit-aligned ADDR in the child |
418 | process, which is 64-bit if ARCH64 and 32-bit otherwise. Return | |
419 | success. */ | |
420 | ||
421 | static int | |
422 | read_word (CORE_ADDR from, int *to, int arch64) | |
423 | { | |
424 | /* Retrieved values may be -1, so infer errors from errno. */ | |
425 | errno = 0; | |
426 | ||
427 | if (arch64) | |
8b5790f2 | 428 | *to = rs6000_ptrace64 (PT_READ_I, PIDGET (inferior_ptid), from, 0, NULL); |
c906108c | 429 | else |
8b5790f2 | 430 | *to = rs6000_ptrace32 (PT_READ_I, PIDGET (inferior_ptid), (int *)(long) from, |
39f77062 | 431 | 0, NULL); |
c906108c | 432 | |
7a78ae4e ND |
433 | return !errno; |
434 | } | |
435 | ||
436 | /* Copy LEN bytes to or from inferior's memory starting at MEMADDR | |
437 | to debugger memory starting at MYADDR. Copy to inferior if | |
438 | WRITE is nonzero. | |
439 | ||
440 | Returns the length copied, which is either the LEN argument or zero. | |
441 | This xfer function does not do partial moves, since child_ops | |
442 | doesn't allow memory operations to cross below us in the target stack | |
443 | anyway. */ | |
444 | ||
445 | int | |
446 | child_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, | |
d737ece6 PS |
447 | int write, struct mem_attrib *attrib, |
448 | struct target_ops *target) | |
7a78ae4e ND |
449 | { |
450 | /* Round starting address down to 32-bit word boundary. */ | |
451 | int mask = sizeof (int) - 1; | |
452 | CORE_ADDR addr = memaddr & ~(CORE_ADDR)mask; | |
453 | ||
454 | /* Round ending address up to 32-bit word boundary. */ | |
455 | int count = ((memaddr + len - addr + mask) & ~(CORE_ADDR)mask) | |
456 | / sizeof (int); | |
457 | ||
458 | /* Allocate word transfer buffer. */ | |
d33fc4e4 MS |
459 | /* FIXME (alloca): This code, cloned from infptrace.c, is unsafe |
460 | because it uses alloca to allocate a buffer of arbitrary size. | |
461 | For very large xfers, this could crash GDB's stack. */ | |
7a78ae4e ND |
462 | int *buf = (int *) alloca (count * sizeof (int)); |
463 | ||
464 | int arch64 = ARCH64 (); | |
465 | int i; | |
466 | ||
467 | if (!write) | |
c906108c | 468 | { |
7a78ae4e ND |
469 | /* Retrieve memory a word at a time. */ |
470 | for (i = 0; i < count; i++, addr += sizeof (int)) | |
471 | { | |
472 | if (!read_word (addr, buf + i, arch64)) | |
473 | return 0; | |
474 | QUIT; | |
475 | } | |
476 | ||
477 | /* Copy memory to supplied buffer. */ | |
478 | addr -= count * sizeof (int); | |
479 | memcpy (myaddr, (char *)buf + (memaddr - addr), len); | |
c906108c | 480 | } |
7a78ae4e ND |
481 | else |
482 | { | |
483 | /* Fetch leading memory needed for alignment. */ | |
484 | if (addr < memaddr) | |
485 | if (!read_word (addr, buf, arch64)) | |
486 | return 0; | |
487 | ||
488 | /* Fetch trailing memory needed for alignment. */ | |
489 | if (addr + count * sizeof (int) > memaddr + len) | |
a191ea8d JB |
490 | if (!read_word (addr + (count - 1) * sizeof (int), |
491 | buf + count - 1, arch64)) | |
7a78ae4e ND |
492 | return 0; |
493 | ||
494 | /* Copy supplied data into memory buffer. */ | |
495 | memcpy ((char *)buf + (memaddr - addr), myaddr, len); | |
496 | ||
497 | /* Store memory one word at a time. */ | |
498 | for (i = 0, errno = 0; i < count; i++, addr += sizeof (int)) | |
499 | { | |
500 | if (arch64) | |
8b5790f2 | 501 | rs6000_ptrace64 (PT_WRITE_D, PIDGET (inferior_ptid), addr, buf[i], NULL); |
7a78ae4e | 502 | else |
8b5790f2 | 503 | rs6000_ptrace32 (PT_WRITE_D, PIDGET (inferior_ptid), (int *)(long) addr, |
7a78ae4e ND |
504 | buf[i], NULL); |
505 | ||
506 | if (errno) | |
507 | return 0; | |
508 | QUIT; | |
509 | } | |
510 | } | |
511 | ||
512 | return len; | |
c906108c SS |
513 | } |
514 | ||
515 | /* Execute one dummy breakpoint instruction. This way we give the kernel | |
516 | a chance to do some housekeeping and update inferior's internal data, | |
517 | including u_area. */ | |
518 | ||
519 | static void | |
7a78ae4e | 520 | exec_one_dummy_insn (void) |
c906108c SS |
521 | { |
522 | #define DUMMY_INSN_ADDR (TEXT_SEGMENT_BASE)+0x200 | |
523 | ||
c5aa993b | 524 | char shadow_contents[BREAKPOINT_MAX]; /* Stash old bkpt addr contents */ |
7a78ae4e | 525 | int ret, status, pid; |
c906108c SS |
526 | CORE_ADDR prev_pc; |
527 | ||
528 | /* We plant one dummy breakpoint into DUMMY_INSN_ADDR address. We | |
529 | assume that this address will never be executed again by the real | |
530 | code. */ | |
531 | ||
532 | target_insert_breakpoint (DUMMY_INSN_ADDR, shadow_contents); | |
533 | ||
c906108c SS |
534 | /* You might think this could be done with a single ptrace call, and |
535 | you'd be correct for just about every platform I've ever worked | |
536 | on. However, rs6000-ibm-aix4.1.3 seems to have screwed this up -- | |
537 | the inferior never hits the breakpoint (it's also worth noting | |
538 | powerpc-ibm-aix4.1.3 works correctly). */ | |
539 | prev_pc = read_pc (); | |
540 | write_pc (DUMMY_INSN_ADDR); | |
7a78ae4e | 541 | if (ARCH64 ()) |
8b5790f2 | 542 | ret = rs6000_ptrace64 (PT_CONTINUE, PIDGET (inferior_ptid), 1, 0, NULL); |
7a78ae4e | 543 | else |
8b5790f2 | 544 | ret = rs6000_ptrace32 (PT_CONTINUE, PIDGET (inferior_ptid), (int *)1, 0, NULL); |
c906108c | 545 | |
7a78ae4e | 546 | if (ret != 0) |
c906108c SS |
547 | perror ("pt_continue"); |
548 | ||
c5aa993b JM |
549 | do |
550 | { | |
551 | pid = wait (&status); | |
552 | } | |
39f77062 | 553 | while (pid != PIDGET (inferior_ptid)); |
c5aa993b | 554 | |
c906108c SS |
555 | write_pc (prev_pc); |
556 | target_remove_breakpoint (DUMMY_INSN_ADDR, shadow_contents); | |
557 | } | |
558 | ||
7a78ae4e ND |
559 | /* Fetch registers from the register section in core bfd. */ |
560 | ||
c906108c | 561 | static void |
7a78ae4e ND |
562 | fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, |
563 | int which, CORE_ADDR reg_addr) | |
c906108c | 564 | { |
7a78ae4e | 565 | CoreRegs *regs; |
11bf77db KB |
566 | int regi; |
567 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); | |
7a78ae4e ND |
568 | |
569 | if (which != 0) | |
c906108c | 570 | { |
7a78ae4e ND |
571 | fprintf_unfiltered |
572 | (gdb_stderr, | |
573 | "Gdb error: unknown parameter to fetch_core_registers().\n"); | |
574 | return; | |
c906108c SS |
575 | } |
576 | ||
7a78ae4e | 577 | regs = (CoreRegs *) core_reg_sect; |
c906108c | 578 | |
11bf77db | 579 | /* Put the register values from the core file section in the regcache. */ |
7a78ae4e | 580 | |
11bf77db | 581 | if (ARCH64 ()) |
7a78ae4e | 582 | { |
11bf77db KB |
583 | for (regi = 0; regi < 32; regi++) |
584 | supply_register (regi, (char *) ®s->r64.gpr[regi]); | |
585 | ||
7bcda025 JB |
586 | for (regi = 0; regi < 32; regi++) |
587 | supply_register (tdep->ppc_fp0_regnum + regi, | |
588 | (char *) ®s->r64.fpr[regi]); | |
11bf77db KB |
589 | |
590 | supply_register (PC_REGNUM, (char *) ®s->r64.iar); | |
591 | supply_register (tdep->ppc_ps_regnum, (char *) ®s->r64.msr); | |
592 | supply_register (tdep->ppc_cr_regnum, (char *) ®s->r64.cr); | |
593 | supply_register (tdep->ppc_lr_regnum, (char *) ®s->r64.lr); | |
594 | supply_register (tdep->ppc_ctr_regnum, (char *) ®s->r64.ctr); | |
595 | supply_register (tdep->ppc_xer_regnum, (char *) ®s->r64.xer); | |
7bcda025 | 596 | supply_register (tdep->ppc_fpscr_regnum, (char *) ®s->r64.fpscr); |
7a78ae4e | 597 | } |
c906108c | 598 | else |
7a78ae4e | 599 | { |
11bf77db KB |
600 | for (regi = 0; regi < 32; regi++) |
601 | supply_register (regi, (char *) ®s->r32.gpr[regi]); | |
602 | ||
7bcda025 JB |
603 | for (regi = 0; regi < 32; regi++) |
604 | supply_register (tdep->ppc_fp0_regnum + regi, | |
605 | (char *) ®s->r32.fpr[regi]); | |
11bf77db KB |
606 | |
607 | supply_register (PC_REGNUM, (char *) ®s->r32.iar); | |
608 | supply_register (tdep->ppc_ps_regnum, (char *) ®s->r32.msr); | |
609 | supply_register (tdep->ppc_cr_regnum, (char *) ®s->r32.cr); | |
610 | supply_register (tdep->ppc_lr_regnum, (char *) ®s->r32.lr); | |
611 | supply_register (tdep->ppc_ctr_regnum, (char *) ®s->r32.ctr); | |
612 | supply_register (tdep->ppc_xer_regnum, (char *) ®s->r32.xer); | |
7bcda025 | 613 | supply_register (tdep->ppc_fpscr_regnum, (char *) ®s->r32.fpscr); |
11bf77db KB |
614 | if (tdep->ppc_mq_regnum >= 0) |
615 | supply_register (tdep->ppc_mq_regnum, (char *) ®s->r32.mq); | |
7a78ae4e | 616 | } |
c906108c SS |
617 | } |
618 | \f | |
7a78ae4e ND |
619 | |
620 | /* Copy information about text and data sections from LDI to VP for a 64-bit | |
621 | process if ARCH64 and for a 32-bit process otherwise. */ | |
622 | ||
623 | static void | |
624 | vmap_secs (struct vmap *vp, LdInfo *ldi, int arch64) | |
625 | { | |
626 | if (arch64) | |
627 | { | |
628 | vp->tstart = (CORE_ADDR) ldi->l64.ldinfo_textorg; | |
629 | vp->tend = vp->tstart + ldi->l64.ldinfo_textsize; | |
630 | vp->dstart = (CORE_ADDR) ldi->l64.ldinfo_dataorg; | |
631 | vp->dend = vp->dstart + ldi->l64.ldinfo_datasize; | |
632 | } | |
633 | else | |
634 | { | |
635 | vp->tstart = (unsigned long) ldi->l32.ldinfo_textorg; | |
636 | vp->tend = vp->tstart + ldi->l32.ldinfo_textsize; | |
637 | vp->dstart = (unsigned long) ldi->l32.ldinfo_dataorg; | |
638 | vp->dend = vp->dstart + ldi->l32.ldinfo_datasize; | |
639 | } | |
640 | ||
641 | /* The run time loader maps the file header in addition to the text | |
642 | section and returns a pointer to the header in ldinfo_textorg. | |
643 | Adjust the text start address to point to the real start address | |
644 | of the text section. */ | |
645 | vp->tstart += vp->toffs; | |
646 | } | |
647 | ||
c906108c SS |
648 | /* handle symbol translation on vmapping */ |
649 | ||
650 | static void | |
7a78ae4e | 651 | vmap_symtab (struct vmap *vp) |
c906108c | 652 | { |
52f0bd74 | 653 | struct objfile *objfile; |
c906108c SS |
654 | struct section_offsets *new_offsets; |
655 | int i; | |
c5aa993b | 656 | |
c906108c SS |
657 | objfile = vp->objfile; |
658 | if (objfile == NULL) | |
659 | { | |
660 | /* OK, it's not an objfile we opened ourselves. | |
c5aa993b JM |
661 | Currently, that can only happen with the exec file, so |
662 | relocate the symbols for the symfile. */ | |
c906108c SS |
663 | if (symfile_objfile == NULL) |
664 | return; | |
665 | objfile = symfile_objfile; | |
666 | } | |
63f58cc5 PS |
667 | else if (!vp->loaded) |
668 | /* If symbols are not yet loaded, offsets are not yet valid. */ | |
669 | return; | |
c906108c | 670 | |
9f83329d JB |
671 | new_offsets = |
672 | (struct section_offsets *) | |
673 | alloca (SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); | |
c906108c SS |
674 | |
675 | for (i = 0; i < objfile->num_sections; ++i) | |
f0a58b0b | 676 | new_offsets->offsets[i] = ANOFFSET (objfile->section_offsets, i); |
c5aa993b | 677 | |
c906108c SS |
678 | /* The symbols in the object file are linked to the VMA of the section, |
679 | relocate them VMA relative. */ | |
f0a58b0b EZ |
680 | new_offsets->offsets[SECT_OFF_TEXT (objfile)] = vp->tstart - vp->tvma; |
681 | new_offsets->offsets[SECT_OFF_DATA (objfile)] = vp->dstart - vp->dvma; | |
682 | new_offsets->offsets[SECT_OFF_BSS (objfile)] = vp->dstart - vp->dvma; | |
c906108c SS |
683 | |
684 | objfile_relocate (objfile, new_offsets); | |
685 | } | |
686 | \f | |
687 | /* Add symbols for an objfile. */ | |
688 | ||
689 | static int | |
7a78ae4e | 690 | objfile_symbol_add (void *arg) |
c906108c SS |
691 | { |
692 | struct objfile *obj = (struct objfile *) arg; | |
693 | ||
7e8580c1 | 694 | syms_from_objfile (obj, NULL, 0, 0, 0, 0); |
c906108c SS |
695 | new_symfile_objfile (obj, 0, 0); |
696 | return 1; | |
697 | } | |
698 | ||
63f58cc5 PS |
699 | /* Add symbols for a vmap. Return zero upon error. */ |
700 | ||
701 | int | |
702 | vmap_add_symbols (struct vmap *vp) | |
703 | { | |
704 | if (catch_errors (objfile_symbol_add, vp->objfile, | |
705 | "Error while reading shared library symbols:\n", | |
706 | RETURN_MASK_ALL)) | |
707 | { | |
708 | /* Note this is only done if symbol reading was successful. */ | |
709 | vp->loaded = 1; | |
710 | vmap_symtab (vp); | |
711 | return 1; | |
712 | } | |
713 | return 0; | |
714 | } | |
715 | ||
c906108c SS |
716 | /* Add a new vmap entry based on ldinfo() information. |
717 | ||
718 | If ldi->ldinfo_fd is not valid (e.g. this struct ld_info is from a | |
719 | core file), the caller should set it to -1, and we will open the file. | |
720 | ||
721 | Return the vmap new entry. */ | |
722 | ||
723 | static struct vmap * | |
7a78ae4e | 724 | add_vmap (LdInfo *ldi) |
c906108c SS |
725 | { |
726 | bfd *abfd, *last; | |
52f0bd74 | 727 | char *mem, *objname, *filename; |
c906108c SS |
728 | struct objfile *obj; |
729 | struct vmap *vp; | |
7a78ae4e ND |
730 | int fd; |
731 | ARCH64_DECL (arch64); | |
c906108c SS |
732 | |
733 | /* This ldi structure was allocated using alloca() in | |
734 | xcoff_relocate_symtab(). Now we need to have persistent object | |
735 | and member names, so we should save them. */ | |
736 | ||
7a78ae4e ND |
737 | filename = LDI_FILENAME (ldi, arch64); |
738 | mem = filename + strlen (filename) + 1; | |
c906108c | 739 | mem = savestring (mem, strlen (mem)); |
7a78ae4e | 740 | objname = savestring (filename, strlen (filename)); |
c906108c | 741 | |
7a78ae4e ND |
742 | fd = LDI_FD (ldi, arch64); |
743 | if (fd < 0) | |
c906108c SS |
744 | /* Note that this opens it once for every member; a possible |
745 | enhancement would be to only open it once for every object. */ | |
746 | abfd = bfd_openr (objname, gnutarget); | |
747 | else | |
7a78ae4e | 748 | abfd = bfd_fdopenr (objname, gnutarget, fd); |
c906108c | 749 | if (!abfd) |
63f58cc5 PS |
750 | { |
751 | warning ("Could not open `%s' as an executable file: %s", | |
752 | objname, bfd_errmsg (bfd_get_error ())); | |
753 | return NULL; | |
754 | } | |
c906108c SS |
755 | |
756 | /* make sure we have an object file */ | |
757 | ||
758 | if (bfd_check_format (abfd, bfd_object)) | |
759 | vp = map_vmap (abfd, 0); | |
760 | ||
761 | else if (bfd_check_format (abfd, bfd_archive)) | |
762 | { | |
763 | last = 0; | |
764 | /* FIXME??? am I tossing BFDs? bfd? */ | |
765 | while ((last = bfd_openr_next_archived_file (abfd, last))) | |
cb137aa5 | 766 | if (DEPRECATED_STREQ (mem, last->filename)) |
c906108c SS |
767 | break; |
768 | ||
769 | if (!last) | |
770 | { | |
63f58cc5 | 771 | warning ("\"%s\": member \"%s\" missing.", objname, mem); |
c906108c | 772 | bfd_close (abfd); |
63f58cc5 | 773 | return NULL; |
c906108c SS |
774 | } |
775 | ||
c5aa993b | 776 | if (!bfd_check_format (last, bfd_object)) |
c906108c | 777 | { |
63f58cc5 PS |
778 | warning ("\"%s\": member \"%s\" not in executable format: %s.", |
779 | objname, mem, bfd_errmsg (bfd_get_error ())); | |
780 | bfd_close (last); | |
781 | bfd_close (abfd); | |
782 | return NULL; | |
c906108c SS |
783 | } |
784 | ||
785 | vp = map_vmap (last, abfd); | |
786 | } | |
787 | else | |
788 | { | |
63f58cc5 PS |
789 | warning ("\"%s\": not in executable format: %s.", |
790 | objname, bfd_errmsg (bfd_get_error ())); | |
c906108c | 791 | bfd_close (abfd); |
63f58cc5 | 792 | return NULL; |
c906108c | 793 | } |
2df3850c | 794 | obj = allocate_objfile (vp->bfd, 0); |
c906108c SS |
795 | vp->objfile = obj; |
796 | ||
63f58cc5 PS |
797 | /* Always add symbols for the main objfile. */ |
798 | if (vp == vmap || auto_solib_add) | |
799 | vmap_add_symbols (vp); | |
c906108c SS |
800 | return vp; |
801 | } | |
802 | \f | |
803 | /* update VMAP info with ldinfo() information | |
804 | Input is ptr to ldinfo() results. */ | |
805 | ||
806 | static void | |
7a78ae4e | 807 | vmap_ldinfo (LdInfo *ldi) |
c906108c SS |
808 | { |
809 | struct stat ii, vi; | |
52f0bd74 | 810 | struct vmap *vp; |
c906108c SS |
811 | int got_one, retried; |
812 | int got_exec_file = 0; | |
7a78ae4e ND |
813 | uint next; |
814 | int arch64 = ARCH64 (); | |
c906108c SS |
815 | |
816 | /* For each *ldi, see if we have a corresponding *vp. | |
817 | If so, update the mapping, and symbol table. | |
818 | If not, add an entry and symbol table. */ | |
819 | ||
c5aa993b JM |
820 | do |
821 | { | |
7a78ae4e | 822 | char *name = LDI_FILENAME (ldi, arch64); |
c5aa993b | 823 | char *memb = name + strlen (name) + 1; |
7a78ae4e | 824 | int fd = LDI_FD (ldi, arch64); |
c5aa993b JM |
825 | |
826 | retried = 0; | |
827 | ||
7a78ae4e | 828 | if (fstat (fd, &ii) < 0) |
c5aa993b JM |
829 | { |
830 | /* The kernel sets ld_info to -1, if the process is still using the | |
831 | object, and the object is removed. Keep the symbol info for the | |
832 | removed object and issue a warning. */ | |
833 | warning ("%s (fd=%d) has disappeared, keeping its symbols", | |
7a78ae4e | 834 | name, fd); |
c906108c | 835 | continue; |
c5aa993b JM |
836 | } |
837 | retry: | |
838 | for (got_one = 0, vp = vmap; vp; vp = vp->nxt) | |
839 | { | |
840 | struct objfile *objfile; | |
c906108c | 841 | |
c5aa993b JM |
842 | /* First try to find a `vp', which is the same as in ldinfo. |
843 | If not the same, just continue and grep the next `vp'. If same, | |
844 | relocate its tstart, tend, dstart, dend values. If no such `vp' | |
845 | found, get out of this for loop, add this ldi entry as a new vmap | |
846 | (add_vmap) and come back, find its `vp' and so on... */ | |
847 | ||
848 | /* The filenames are not always sufficient to match on. */ | |
849 | ||
cb137aa5 AC |
850 | if ((name[0] == '/' && !DEPRECATED_STREQ (name, vp->name)) |
851 | || (memb[0] && !DEPRECATED_STREQ (memb, vp->member))) | |
c906108c | 852 | continue; |
c906108c | 853 | |
c5aa993b JM |
854 | /* See if we are referring to the same file. |
855 | We have to check objfile->obfd, symfile.c:reread_symbols might | |
856 | have updated the obfd after a change. */ | |
857 | objfile = vp->objfile == NULL ? symfile_objfile : vp->objfile; | |
858 | if (objfile == NULL | |
859 | || objfile->obfd == NULL | |
860 | || bfd_stat (objfile->obfd, &vi) < 0) | |
861 | { | |
862 | warning ("Unable to stat %s, keeping its symbols", name); | |
863 | continue; | |
864 | } | |
c906108c | 865 | |
c5aa993b JM |
866 | if (ii.st_dev != vi.st_dev || ii.st_ino != vi.st_ino) |
867 | continue; | |
c906108c | 868 | |
c5aa993b | 869 | if (!retried) |
7a78ae4e | 870 | close (fd); |
c906108c | 871 | |
c5aa993b | 872 | ++got_one; |
c906108c | 873 | |
c5aa993b | 874 | /* Found a corresponding VMAP. Remap! */ |
c906108c | 875 | |
7a78ae4e | 876 | vmap_secs (vp, ldi, arch64); |
c906108c | 877 | |
c5aa993b JM |
878 | /* The objfile is only NULL for the exec file. */ |
879 | if (vp->objfile == NULL) | |
880 | got_exec_file = 1; | |
c906108c | 881 | |
c5aa993b JM |
882 | /* relocate symbol table(s). */ |
883 | vmap_symtab (vp); | |
c906108c | 884 | |
e42dc924 KB |
885 | /* Announce new object files. Doing this after symbol relocation |
886 | makes aix-thread.c's job easier. */ | |
9a4105ab AC |
887 | if (deprecated_target_new_objfile_hook && vp->objfile) |
888 | deprecated_target_new_objfile_hook (vp->objfile); | |
e42dc924 | 889 | |
c5aa993b JM |
890 | /* There may be more, so we don't break out of the loop. */ |
891 | } | |
892 | ||
893 | /* if there was no matching *vp, we must perforce create the sucker(s) */ | |
894 | if (!got_one && !retried) | |
895 | { | |
896 | add_vmap (ldi); | |
897 | ++retried; | |
898 | goto retry; | |
899 | } | |
900 | } | |
7a78ae4e ND |
901 | while ((next = LDI_NEXT (ldi, arch64)) |
902 | && (ldi = (void *) (next + (char *) ldi))); | |
c906108c SS |
903 | |
904 | /* If we don't find the symfile_objfile anywhere in the ldinfo, it | |
905 | is unlikely that the symbol file is relocated to the proper | |
906 | address. And we might have attached to a process which is | |
907 | running a different copy of the same executable. */ | |
908 | if (symfile_objfile != NULL && !got_exec_file) | |
909 | { | |
f5a96129 | 910 | warning ("Symbol file %s\nis not mapped; discarding it.\n\ |
c906108c SS |
911 | If in fact that file has symbols which the mapped files listed by\n\ |
912 | \"info files\" lack, you can load symbols with the \"symbol-file\" or\n\ | |
913 | \"add-symbol-file\" commands (note that you must take care of relocating\n\ | |
f5a96129 AC |
914 | symbols to the proper address).", |
915 | symfile_objfile->name); | |
c906108c SS |
916 | free_objfile (symfile_objfile); |
917 | symfile_objfile = NULL; | |
918 | } | |
919 | breakpoint_re_set (); | |
920 | } | |
921 | \f | |
922 | /* As well as symbol tables, exec_sections need relocation. After | |
923 | the inferior process' termination, there will be a relocated symbol | |
924 | table exist with no corresponding inferior process. At that time, we | |
925 | need to use `exec' bfd, rather than the inferior process's memory space | |
926 | to look up symbols. | |
927 | ||
928 | `exec_sections' need to be relocated only once, as long as the exec | |
929 | file remains unchanged. | |
c5aa993b | 930 | */ |
c906108c SS |
931 | |
932 | static void | |
7a78ae4e | 933 | vmap_exec (void) |
c906108c SS |
934 | { |
935 | static bfd *execbfd; | |
936 | int i; | |
937 | ||
938 | if (execbfd == exec_bfd) | |
939 | return; | |
940 | ||
941 | execbfd = exec_bfd; | |
942 | ||
943 | if (!vmap || !exec_ops.to_sections) | |
944 | error ("vmap_exec: vmap or exec_ops.to_sections == 0\n"); | |
945 | ||
c5aa993b | 946 | for (i = 0; &exec_ops.to_sections[i] < exec_ops.to_sections_end; i++) |
c906108c | 947 | { |
cb137aa5 | 948 | if (DEPRECATED_STREQ (".text", exec_ops.to_sections[i].the_bfd_section->name)) |
c906108c SS |
949 | { |
950 | exec_ops.to_sections[i].addr += vmap->tstart - vmap->tvma; | |
951 | exec_ops.to_sections[i].endaddr += vmap->tstart - vmap->tvma; | |
952 | } | |
cb137aa5 | 953 | else if (DEPRECATED_STREQ (".data", exec_ops.to_sections[i].the_bfd_section->name)) |
c906108c SS |
954 | { |
955 | exec_ops.to_sections[i].addr += vmap->dstart - vmap->dvma; | |
956 | exec_ops.to_sections[i].endaddr += vmap->dstart - vmap->dvma; | |
957 | } | |
cb137aa5 | 958 | else if (DEPRECATED_STREQ (".bss", exec_ops.to_sections[i].the_bfd_section->name)) |
c906108c SS |
959 | { |
960 | exec_ops.to_sections[i].addr += vmap->dstart - vmap->dvma; | |
961 | exec_ops.to_sections[i].endaddr += vmap->dstart - vmap->dvma; | |
962 | } | |
963 | } | |
964 | } | |
7a78ae4e ND |
965 | |
966 | /* Set the current architecture from the host running GDB. Called when | |
967 | starting a child process. */ | |
968 | ||
969 | static void | |
970 | set_host_arch (int pid) | |
971 | { | |
972 | enum bfd_architecture arch; | |
973 | unsigned long mach; | |
974 | bfd abfd; | |
975 | struct gdbarch_info info; | |
976 | ||
977 | if (__power_rs ()) | |
978 | { | |
979 | arch = bfd_arch_rs6000; | |
980 | mach = bfd_mach_rs6k; | |
981 | } | |
982 | else | |
983 | { | |
984 | arch = bfd_arch_powerpc; | |
985 | mach = bfd_mach_ppc; | |
986 | } | |
19caaa45 PS |
987 | |
988 | /* FIXME: schauer/2002-02-25: | |
989 | We don't know if we are executing a 32 or 64 bit executable, | |
990 | and have no way to pass the proper word size to rs6000_gdbarch_init. | |
991 | So we have to avoid switching to a new architecture, if the architecture | |
992 | matches already. | |
993 | Blindly calling rs6000_gdbarch_init used to work in older versions of | |
994 | GDB, as rs6000_gdbarch_init incorrectly used the previous tdep to | |
995 | determine the wordsize. */ | |
996 | if (exec_bfd) | |
997 | { | |
998 | const struct bfd_arch_info *exec_bfd_arch_info; | |
999 | ||
1000 | exec_bfd_arch_info = bfd_get_arch_info (exec_bfd); | |
1001 | if (arch == exec_bfd_arch_info->arch) | |
1002 | return; | |
1003 | } | |
1004 | ||
7a78ae4e ND |
1005 | bfd_default_set_arch_mach (&abfd, arch, mach); |
1006 | ||
fb6ecb0f | 1007 | gdbarch_info_init (&info); |
7a78ae4e | 1008 | info.bfd_arch_info = bfd_get_arch_info (&abfd); |
7aea86e6 | 1009 | info.abfd = exec_bfd; |
7a78ae4e | 1010 | |
16f33e29 AC |
1011 | if (!gdbarch_update_p (info)) |
1012 | { | |
8e65ff28 AC |
1013 | internal_error (__FILE__, __LINE__, |
1014 | "set_host_arch: failed to select architecture"); | |
16f33e29 | 1015 | } |
7a78ae4e ND |
1016 | } |
1017 | ||
c906108c | 1018 | \f |
c5aa993b | 1019 | /* xcoff_relocate_symtab - hook for symbol table relocation. |
c906108c SS |
1020 | also reads shared libraries.. */ |
1021 | ||
1022 | void | |
7a78ae4e | 1023 | xcoff_relocate_symtab (unsigned int pid) |
c906108c | 1024 | { |
c18e0d23 | 1025 | int load_segs = 64; /* number of load segments */ |
380b774b | 1026 | int rc; |
7a78ae4e ND |
1027 | LdInfo *ldi = NULL; |
1028 | int arch64 = ARCH64 (); | |
1029 | int ldisize = arch64 ? sizeof (ldi->l64) : sizeof (ldi->l32); | |
1030 | int size; | |
c906108c | 1031 | |
c18e0d23 GM |
1032 | do |
1033 | { | |
7a78ae4e | 1034 | size = load_segs * ldisize; |
3a84337c | 1035 | ldi = (void *) xrealloc (ldi, size); |
c906108c | 1036 | |
7a78ae4e | 1037 | #if 0 |
380b774b GM |
1038 | /* According to my humble theory, AIX has some timing problems and |
1039 | when the user stack grows, kernel doesn't update stack info in time | |
1040 | and ptrace calls step on user stack. That is why we sleep here a | |
1041 | little, and give kernel to update its internals. */ | |
380b774b | 1042 | usleep (36000); |
7a78ae4e ND |
1043 | #endif |
1044 | ||
1045 | if (arch64) | |
8b5790f2 | 1046 | rc = rs6000_ptrace64 (PT_LDINFO, pid, (unsigned long) ldi, size, NULL); |
7a78ae4e | 1047 | else |
8b5790f2 | 1048 | rc = rs6000_ptrace32 (PT_LDINFO, pid, (int *) ldi, size, NULL); |
c906108c | 1049 | |
c18e0d23 GM |
1050 | if (rc == -1) |
1051 | { | |
380b774b GM |
1052 | if (errno == ENOMEM) |
1053 | load_segs *= 2; | |
1054 | else | |
1055 | perror_with_name ("ptrace ldinfo"); | |
c18e0d23 GM |
1056 | } |
1057 | else | |
1058 | { | |
380b774b GM |
1059 | vmap_ldinfo (ldi); |
1060 | vmap_exec (); /* relocate the exec and core sections as well. */ | |
c18e0d23 GM |
1061 | } |
1062 | } while (rc == -1); | |
380b774b | 1063 | if (ldi) |
b8c9b27d | 1064 | xfree (ldi); |
c906108c SS |
1065 | } |
1066 | \f | |
1067 | /* Core file stuff. */ | |
1068 | ||
1069 | /* Relocate symtabs and read in shared library info, based on symbols | |
1070 | from the core file. */ | |
1071 | ||
1072 | void | |
7a78ae4e | 1073 | xcoff_relocate_core (struct target_ops *target) |
c906108c | 1074 | { |
7be0c536 | 1075 | struct bfd_section *ldinfo_sec; |
c906108c | 1076 | int offset = 0; |
7a78ae4e | 1077 | LdInfo *ldi; |
c906108c | 1078 | struct vmap *vp; |
7a78ae4e ND |
1079 | int arch64 = ARCH64 (); |
1080 | ||
1081 | /* Size of a struct ld_info except for the variable-length filename. */ | |
1082 | int nonfilesz = (int)LDI_FILENAME ((LdInfo *)0, arch64); | |
c906108c SS |
1083 | |
1084 | /* Allocated size of buffer. */ | |
7a78ae4e | 1085 | int buffer_size = nonfilesz; |
c906108c SS |
1086 | char *buffer = xmalloc (buffer_size); |
1087 | struct cleanup *old = make_cleanup (free_current_contents, &buffer); | |
c5aa993b | 1088 | |
c906108c SS |
1089 | ldinfo_sec = bfd_get_section_by_name (core_bfd, ".ldinfo"); |
1090 | if (ldinfo_sec == NULL) | |
1091 | { | |
1092 | bfd_err: | |
1093 | fprintf_filtered (gdb_stderr, "Couldn't get ldinfo from core file: %s\n", | |
1094 | bfd_errmsg (bfd_get_error ())); | |
1095 | do_cleanups (old); | |
1096 | return; | |
1097 | } | |
1098 | do | |
1099 | { | |
1100 | int i; | |
1101 | int names_found = 0; | |
1102 | ||
1103 | /* Read in everything but the name. */ | |
1104 | if (bfd_get_section_contents (core_bfd, ldinfo_sec, buffer, | |
7a78ae4e | 1105 | offset, nonfilesz) == 0) |
c906108c SS |
1106 | goto bfd_err; |
1107 | ||
1108 | /* Now the name. */ | |
7a78ae4e | 1109 | i = nonfilesz; |
c906108c SS |
1110 | do |
1111 | { | |
1112 | if (i == buffer_size) | |
1113 | { | |
1114 | buffer_size *= 2; | |
1115 | buffer = xrealloc (buffer, buffer_size); | |
1116 | } | |
1117 | if (bfd_get_section_contents (core_bfd, ldinfo_sec, &buffer[i], | |
1118 | offset + i, 1) == 0) | |
1119 | goto bfd_err; | |
1120 | if (buffer[i++] == '\0') | |
1121 | ++names_found; | |
c5aa993b JM |
1122 | } |
1123 | while (names_found < 2); | |
c906108c | 1124 | |
7a78ae4e | 1125 | ldi = (LdInfo *) buffer; |
c906108c SS |
1126 | |
1127 | /* Can't use a file descriptor from the core file; need to open it. */ | |
7a78ae4e ND |
1128 | if (arch64) |
1129 | ldi->l64.ldinfo_fd = -1; | |
1130 | else | |
1131 | ldi->l32.ldinfo_fd = -1; | |
c5aa993b | 1132 | |
c906108c | 1133 | /* The first ldinfo is for the exec file, allocated elsewhere. */ |
63f58cc5 | 1134 | if (offset == 0 && vmap != NULL) |
c906108c SS |
1135 | vp = vmap; |
1136 | else | |
7a78ae4e | 1137 | vp = add_vmap (ldi); |
c906108c | 1138 | |
63f58cc5 | 1139 | /* Process next shared library upon error. */ |
7a78ae4e | 1140 | offset += LDI_NEXT (ldi, arch64); |
63f58cc5 PS |
1141 | if (vp == NULL) |
1142 | continue; | |
1143 | ||
7a78ae4e | 1144 | vmap_secs (vp, ldi, arch64); |
c906108c SS |
1145 | |
1146 | /* Unless this is the exec file, | |
c5aa993b | 1147 | add our sections to the section table for the core target. */ |
c906108c SS |
1148 | if (vp != vmap) |
1149 | { | |
c906108c | 1150 | struct section_table *stp; |
6426a772 JM |
1151 | |
1152 | target_resize_to_sections (target, 2); | |
c906108c SS |
1153 | stp = target->to_sections_end - 2; |
1154 | ||
1155 | stp->bfd = vp->bfd; | |
1156 | stp->the_bfd_section = bfd_get_section_by_name (stp->bfd, ".text"); | |
1157 | stp->addr = vp->tstart; | |
1158 | stp->endaddr = vp->tend; | |
1159 | stp++; | |
c5aa993b | 1160 | |
c906108c SS |
1161 | stp->bfd = vp->bfd; |
1162 | stp->the_bfd_section = bfd_get_section_by_name (stp->bfd, ".data"); | |
1163 | stp->addr = vp->dstart; | |
1164 | stp->endaddr = vp->dend; | |
1165 | } | |
1166 | ||
1167 | vmap_symtab (vp); | |
e42dc924 | 1168 | |
9a4105ab AC |
1169 | if (deprecated_target_new_objfile_hook && vp != vmap && vp->objfile) |
1170 | deprecated_target_new_objfile_hook (vp->objfile); | |
c5aa993b | 1171 | } |
7a78ae4e | 1172 | while (LDI_NEXT (ldi, arch64) != 0); |
c906108c SS |
1173 | vmap_exec (); |
1174 | breakpoint_re_set (); | |
1175 | do_cleanups (old); | |
1176 | } | |
1177 | ||
1178 | int | |
7a78ae4e | 1179 | kernel_u_size (void) |
c906108c SS |
1180 | { |
1181 | return (sizeof (struct user)); | |
1182 | } | |
1183 | \f | |
1184 | /* Under AIX, we have to pass the correct TOC pointer to a function | |
1185 | when calling functions in the inferior. | |
1186 | We try to find the relative toc offset of the objfile containing PC | |
1187 | and add the current load address of the data segment from the vmap. */ | |
1188 | ||
1189 | static CORE_ADDR | |
7a78ae4e | 1190 | find_toc_address (CORE_ADDR pc) |
c906108c SS |
1191 | { |
1192 | struct vmap *vp; | |
7a78ae4e | 1193 | extern CORE_ADDR get_toc_offset (struct objfile *); /* xcoffread.c */ |
c906108c SS |
1194 | |
1195 | for (vp = vmap; vp; vp = vp->nxt) | |
1196 | { | |
1197 | if (pc >= vp->tstart && pc < vp->tend) | |
1198 | { | |
1199 | /* vp->objfile is only NULL for the exec file. */ | |
1200 | return vp->dstart + get_toc_offset (vp->objfile == NULL | |
1201 | ? symfile_objfile | |
1202 | : vp->objfile); | |
1203 | } | |
1204 | } | |
11bf77db | 1205 | error ("Unable to find TOC entry for pc %s\n", local_hex_string (pc)); |
c906108c SS |
1206 | } |
1207 | \f | |
1208 | /* Register that we are able to handle rs6000 core file formats. */ | |
1209 | ||
1210 | static struct core_fns rs6000_core_fns = | |
1211 | { | |
7a78ae4e | 1212 | bfd_target_xcoff_flavour, /* core_flavour */ |
2acceee2 JM |
1213 | default_check_format, /* check_format */ |
1214 | default_core_sniffer, /* core_sniffer */ | |
1215 | fetch_core_registers, /* core_read_registers */ | |
1216 | NULL /* next */ | |
c906108c SS |
1217 | }; |
1218 | ||
1219 | void | |
7a78ae4e | 1220 | _initialize_core_rs6000 (void) |
c906108c SS |
1221 | { |
1222 | /* Initialize hook in rs6000-tdep.c for determining the TOC address when | |
1223 | calling functions in the inferior. */ | |
7a78ae4e ND |
1224 | rs6000_find_toc_address_hook = find_toc_address; |
1225 | ||
1226 | /* Initialize hook in rs6000-tdep.c to set the current architecture when | |
1227 | starting a child process. */ | |
1228 | rs6000_set_host_arch_hook = set_host_arch; | |
c906108c | 1229 | |
00e32a35 | 1230 | deprecated_add_core_fns (&rs6000_core_fns); |
c906108c | 1231 | } |