Commit | Line | Data |
---|---|---|
c906108c | 1 | /* IBM RS/6000 native-dependent code for GDB, the GNU debugger. |
4646aa9d | 2 | |
6aba47ca DJ |
3 | Copyright (C) 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997, |
4 | 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2007 | |
5 | Free Software 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 | |
197e01b6 EZ |
21 | Foundation, Inc., 51 Franklin Street, Fifth Floor, |
22 | Boston, MA 02110-1301, 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" | |
42203e46 | 31 | #include "libbfd.h" /* For bfd_default_set_arch_mach (FIXME) */ |
c906108c | 32 | #include "bfd.h" |
60250e8b | 33 | #include "exceptions.h" |
c906108c | 34 | #include "gdb-stabs.h" |
4e052eda | 35 | #include "regcache.h" |
19caaa45 | 36 | #include "arch-utils.h" |
11bf77db | 37 | #include "ppc-tdep.h" |
6f7f3f0d | 38 | #include "rs6000-tdep.h" |
4646aa9d | 39 | #include "exec.h" |
c906108c SS |
40 | |
41 | #include <sys/ptrace.h> | |
42 | #include <sys/reg.h> | |
43 | ||
44 | #include <sys/param.h> | |
45 | #include <sys/dir.h> | |
46 | #include <sys/user.h> | |
47 | #include <signal.h> | |
48 | #include <sys/ioctl.h> | |
49 | #include <fcntl.h> | |
7a78ae4e | 50 | #include <errno.h> |
c906108c SS |
51 | |
52 | #include <a.out.h> | |
53 | #include <sys/file.h> | |
54 | #include "gdb_stat.h" | |
55 | #include <sys/core.h> | |
7a78ae4e ND |
56 | #define __LDINFO_PTRACE32__ /* for __ld_info32 */ |
57 | #define __LDINFO_PTRACE64__ /* for __ld_info64 */ | |
c906108c | 58 | #include <sys/ldr.h> |
7a78ae4e | 59 | #include <sys/systemcfg.h> |
c906108c | 60 | |
7a78ae4e ND |
61 | /* On AIX4.3+, sys/ldr.h provides different versions of struct ld_info for |
62 | debugging 32-bit and 64-bit processes. Define a typedef and macros for | |
63 | accessing fields in the appropriate structures. */ | |
64 | ||
65 | /* In 32-bit compilation mode (which is the only mode from which ptrace() | |
66 | works on 4.3), __ld_info32 is #defined as equivalent to ld_info. */ | |
67 | ||
68 | #ifdef __ld_info32 | |
69 | # define ARCH3264 | |
70 | #endif | |
71 | ||
72 | /* Return whether the current architecture is 64-bit. */ | |
73 | ||
74 | #ifndef ARCH3264 | |
75 | # define ARCH64() 0 | |
76 | #else | |
3acba339 | 77 | # define ARCH64() (register_size (current_gdbarch, 0) == 8) |
7a78ae4e ND |
78 | #endif |
79 | ||
80 | /* Union of 32-bit and 64-bit ".reg" core file sections. */ | |
81 | ||
82 | typedef union { | |
83 | #ifdef ARCH3264 | |
84 | struct __context64 r64; | |
85 | #else | |
86 | struct mstsave r64; | |
87 | #endif | |
88 | struct mstsave r32; | |
89 | } CoreRegs; | |
90 | ||
91 | /* Union of 32-bit and 64-bit versions of ld_info. */ | |
92 | ||
93 | typedef union { | |
94 | #ifndef ARCH3264 | |
95 | struct ld_info l32; | |
96 | struct ld_info l64; | |
97 | #else | |
98 | struct __ld_info32 l32; | |
99 | struct __ld_info64 l64; | |
100 | #endif | |
101 | } LdInfo; | |
102 | ||
103 | /* If compiling with 32-bit and 64-bit debugging capability (e.g. AIX 4.x), | |
104 | declare and initialize a variable named VAR suitable for use as the arch64 | |
105 | parameter to the various LDI_*() macros. */ | |
106 | ||
107 | #ifndef ARCH3264 | |
108 | # define ARCH64_DECL(var) | |
109 | #else | |
110 | # define ARCH64_DECL(var) int var = ARCH64 () | |
111 | #endif | |
112 | ||
113 | /* Return LDI's FIELD for a 64-bit process if ARCH64 and for a 32-bit process | |
114 | otherwise. This technique only works for FIELDs with the same data type in | |
115 | 32-bit and 64-bit versions of ld_info. */ | |
116 | ||
117 | #ifndef ARCH3264 | |
118 | # define LDI_FIELD(ldi, arch64, field) (ldi)->l32.ldinfo_##field | |
119 | #else | |
120 | # define LDI_FIELD(ldi, arch64, field) \ | |
121 | (arch64 ? (ldi)->l64.ldinfo_##field : (ldi)->l32.ldinfo_##field) | |
122 | #endif | |
123 | ||
124 | /* Return various LDI fields for a 64-bit process if ARCH64 and for a 32-bit | |
125 | process otherwise. */ | |
126 | ||
127 | #define LDI_NEXT(ldi, arch64) LDI_FIELD(ldi, arch64, next) | |
128 | #define LDI_FD(ldi, arch64) LDI_FIELD(ldi, arch64, fd) | |
129 | #define LDI_FILENAME(ldi, arch64) LDI_FIELD(ldi, arch64, filename) | |
c906108c | 130 | |
a14ed312 | 131 | extern struct vmap *map_vmap (bfd * bf, bfd * arch); |
c906108c | 132 | |
a14ed312 | 133 | static void vmap_exec (void); |
c906108c | 134 | |
7a78ae4e | 135 | static void vmap_ldinfo (LdInfo *); |
c906108c | 136 | |
7a78ae4e | 137 | static struct vmap *add_vmap (LdInfo *); |
c906108c | 138 | |
7a78ae4e | 139 | static int objfile_symbol_add (void *); |
c906108c | 140 | |
a14ed312 | 141 | static void vmap_symtab (struct vmap *); |
c906108c | 142 | |
a14ed312 | 143 | static void fetch_core_registers (char *, unsigned int, int, CORE_ADDR); |
c906108c | 144 | |
a14ed312 | 145 | static void exec_one_dummy_insn (void); |
c906108c | 146 | |
570b8f7c | 147 | extern void fixup_breakpoints (CORE_ADDR low, CORE_ADDR high, CORE_ADDR delta); |
c906108c | 148 | |
dd7be90a KB |
149 | /* Given REGNO, a gdb register number, return the corresponding |
150 | number suitable for use as a ptrace() parameter. Return -1 if | |
151 | there's no suitable mapping. Also, set the int pointed to by | |
152 | ISFLOAT to indicate whether REGNO is a floating point register. */ | |
c906108c | 153 | |
dd7be90a KB |
154 | static int |
155 | regmap (int regno, int *isfloat) | |
c5aa993b | 156 | { |
dd7be90a KB |
157 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); |
158 | ||
159 | *isfloat = 0; | |
8bf659e8 JB |
160 | if (tdep->ppc_gp0_regnum <= regno |
161 | && regno < tdep->ppc_gp0_regnum + ppc_num_gprs) | |
dd7be90a | 162 | return regno; |
383f0f5b JB |
163 | else if (tdep->ppc_fp0_regnum >= 0 |
164 | && tdep->ppc_fp0_regnum <= regno | |
366f009f | 165 | && regno < tdep->ppc_fp0_regnum + ppc_num_fprs) |
dd7be90a KB |
166 | { |
167 | *isfloat = 1; | |
366f009f | 168 | return regno - tdep->ppc_fp0_regnum + FPR0; |
dd7be90a KB |
169 | } |
170 | else if (regno == PC_REGNUM) | |
171 | return IAR; | |
172 | else if (regno == tdep->ppc_ps_regnum) | |
173 | return MSR; | |
174 | else if (regno == tdep->ppc_cr_regnum) | |
175 | return CR; | |
176 | else if (regno == tdep->ppc_lr_regnum) | |
177 | return LR; | |
178 | else if (regno == tdep->ppc_ctr_regnum) | |
179 | return CTR; | |
180 | else if (regno == tdep->ppc_xer_regnum) | |
181 | return XER; | |
383f0f5b JB |
182 | else if (tdep->ppc_fpscr_regnum >= 0 |
183 | && regno == tdep->ppc_fpscr_regnum) | |
0e061eef | 184 | return FPSCR; |
dd7be90a KB |
185 | else if (tdep->ppc_mq_regnum >= 0 && regno == tdep->ppc_mq_regnum) |
186 | return MQ; | |
187 | else | |
188 | return -1; | |
189 | } | |
c906108c | 190 | |
7a78ae4e | 191 | /* Call ptrace(REQ, ID, ADDR, DATA, BUF). */ |
c906108c | 192 | |
7a78ae4e | 193 | static int |
8b5790f2 | 194 | rs6000_ptrace32 (int req, int id, int *addr, int data, int *buf) |
7a78ae4e ND |
195 | { |
196 | int ret = ptrace (req, id, (int *)addr, data, buf); | |
197 | #if 0 | |
8b5790f2 | 198 | printf ("rs6000_ptrace32 (%d, %d, 0x%x, %08x, 0x%x) = 0x%x\n", |
7a78ae4e ND |
199 | req, id, (unsigned int)addr, data, (unsigned int)buf, ret); |
200 | #endif | |
201 | return ret; | |
202 | } | |
c906108c | 203 | |
7a78ae4e | 204 | /* Call ptracex(REQ, ID, ADDR, DATA, BUF). */ |
c906108c | 205 | |
7a78ae4e | 206 | static int |
8b5790f2 | 207 | rs6000_ptrace64 (int req, int id, long long addr, int data, int *buf) |
7a78ae4e ND |
208 | { |
209 | #ifdef ARCH3264 | |
210 | int ret = ptracex (req, id, addr, data, buf); | |
211 | #else | |
212 | int ret = 0; | |
213 | #endif | |
214 | #if 0 | |
8b5790f2 | 215 | printf ("rs6000_ptrace64 (%d, %d, 0x%llx, %08x, 0x%x) = 0x%x\n", |
7a78ae4e ND |
216 | req, id, addr, data, (unsigned int)buf, ret); |
217 | #endif | |
218 | return ret; | |
219 | } | |
c906108c | 220 | |
7a78ae4e | 221 | /* Fetch register REGNO from the inferior. */ |
c906108c | 222 | |
7a78ae4e ND |
223 | static void |
224 | fetch_register (int regno) | |
225 | { | |
d9d9c31f | 226 | int addr[MAX_REGISTER_SIZE]; |
dd7be90a | 227 | int nr, isfloat; |
c906108c | 228 | |
7a78ae4e ND |
229 | /* Retrieved values may be -1, so infer errors from errno. */ |
230 | errno = 0; | |
c906108c | 231 | |
dd7be90a KB |
232 | nr = regmap (regno, &isfloat); |
233 | ||
7a78ae4e | 234 | /* Floating-point registers. */ |
dd7be90a KB |
235 | if (isfloat) |
236 | rs6000_ptrace32 (PT_READ_FPR, PIDGET (inferior_ptid), addr, nr, 0); | |
c906108c | 237 | |
7a78ae4e | 238 | /* Bogus register number. */ |
dd7be90a | 239 | else if (nr < 0) |
2a18e3d9 EZ |
240 | { |
241 | if (regno >= NUM_REGS) | |
242 | fprintf_unfiltered (gdb_stderr, | |
243 | "gdb error: register no %d not implemented.\n", | |
244 | regno); | |
dd7be90a | 245 | return; |
2a18e3d9 | 246 | } |
c906108c | 247 | |
7a78ae4e ND |
248 | /* Fixed-point registers. */ |
249 | else | |
250 | { | |
7a78ae4e | 251 | if (!ARCH64 ()) |
8b5790f2 | 252 | *addr = rs6000_ptrace32 (PT_READ_GPR, PIDGET (inferior_ptid), (int *)nr, 0, 0); |
7a78ae4e ND |
253 | else |
254 | { | |
255 | /* PT_READ_GPR requires the buffer parameter to point to long long, | |
256 | even if the register is really only 32 bits. */ | |
257 | long long buf; | |
8b5790f2 | 258 | rs6000_ptrace64 (PT_READ_GPR, PIDGET (inferior_ptid), nr, 0, (int *)&buf); |
3acba339 | 259 | if (register_size (current_gdbarch, regno) == 8) |
7a78ae4e ND |
260 | memcpy (addr, &buf, 8); |
261 | else | |
262 | *addr = buf; | |
263 | } | |
264 | } | |
265 | ||
266 | if (!errno) | |
23a6d369 | 267 | regcache_raw_supply (current_regcache, regno, (char *) addr); |
7a78ae4e ND |
268 | else |
269 | { | |
270 | #if 0 | |
271 | /* FIXME: this happens 3 times at the start of each 64-bit program. */ | |
272 | perror ("ptrace read"); | |
273 | #endif | |
274 | errno = 0; | |
275 | } | |
c906108c SS |
276 | } |
277 | ||
7a78ae4e | 278 | /* Store register REGNO back into the inferior. */ |
c906108c | 279 | |
7a78ae4e ND |
280 | static void |
281 | store_register (int regno) | |
c906108c | 282 | { |
d9d9c31f | 283 | int addr[MAX_REGISTER_SIZE]; |
dd7be90a | 284 | int nr, isfloat; |
c906108c | 285 | |
11bf77db | 286 | /* Fetch the register's value from the register cache. */ |
822c9732 | 287 | regcache_raw_collect (current_regcache, regno, addr); |
11bf77db | 288 | |
7a78ae4e | 289 | /* -1 can be a successful return value, so infer errors from errno. */ |
c906108c SS |
290 | errno = 0; |
291 | ||
dd7be90a KB |
292 | nr = regmap (regno, &isfloat); |
293 | ||
7a78ae4e | 294 | /* Floating-point registers. */ |
dd7be90a KB |
295 | if (isfloat) |
296 | rs6000_ptrace32 (PT_WRITE_FPR, PIDGET (inferior_ptid), addr, nr, 0); | |
c906108c | 297 | |
7a78ae4e | 298 | /* Bogus register number. */ |
dd7be90a | 299 | else if (nr < 0) |
7a78ae4e ND |
300 | { |
301 | if (regno >= NUM_REGS) | |
302 | fprintf_unfiltered (gdb_stderr, | |
303 | "gdb error: register no %d not implemented.\n", | |
304 | regno); | |
305 | } | |
c906108c | 306 | |
7a78ae4e ND |
307 | /* Fixed-point registers. */ |
308 | else | |
309 | { | |
310 | if (regno == SP_REGNUM) | |
311 | /* Execute one dummy instruction (which is a breakpoint) in inferior | |
312 | process to give kernel a chance to do internal housekeeping. | |
313 | Otherwise the following ptrace(2) calls will mess up user stack | |
314 | since kernel will get confused about the bottom of the stack | |
315 | (%sp). */ | |
316 | exec_one_dummy_insn (); | |
c906108c | 317 | |
11bf77db KB |
318 | /* The PT_WRITE_GPR operation is rather odd. For 32-bit inferiors, |
319 | the register's value is passed by value, but for 64-bit inferiors, | |
320 | the address of a buffer containing the value is passed. */ | |
7a78ae4e | 321 | if (!ARCH64 ()) |
8b5790f2 | 322 | rs6000_ptrace32 (PT_WRITE_GPR, PIDGET (inferior_ptid), (int *)nr, *addr, 0); |
7a78ae4e | 323 | else |
c906108c | 324 | { |
7a78ae4e ND |
325 | /* PT_WRITE_GPR requires the buffer parameter to point to an 8-byte |
326 | area, even if the register is really only 32 bits. */ | |
327 | long long buf; | |
3acba339 | 328 | if (register_size (current_gdbarch, regno) == 8) |
7a78ae4e ND |
329 | memcpy (&buf, addr, 8); |
330 | else | |
331 | buf = *addr; | |
8b5790f2 | 332 | rs6000_ptrace64 (PT_WRITE_GPR, PIDGET (inferior_ptid), nr, 0, (int *)&buf); |
c906108c SS |
333 | } |
334 | } | |
335 | ||
7a78ae4e | 336 | if (errno) |
c906108c | 337 | { |
7a78ae4e ND |
338 | perror ("ptrace write"); |
339 | errno = 0; | |
c906108c | 340 | } |
7a78ae4e | 341 | } |
c906108c | 342 | |
7a78ae4e ND |
343 | /* Read from the inferior all registers if REGNO == -1 and just register |
344 | REGNO otherwise. */ | |
c906108c | 345 | |
7a78ae4e ND |
346 | void |
347 | fetch_inferior_registers (int regno) | |
348 | { | |
349 | if (regno != -1) | |
350 | fetch_register (regno); | |
351 | ||
352 | else | |
c906108c | 353 | { |
dd7be90a | 354 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); |
7a78ae4e | 355 | |
dd7be90a KB |
356 | /* Read 32 general purpose registers. */ |
357 | for (regno = tdep->ppc_gp0_regnum; | |
8bf659e8 | 358 | regno < tdep->ppc_gp0_regnum + ppc_num_gprs; |
dd7be90a KB |
359 | regno++) |
360 | { | |
361 | fetch_register (regno); | |
362 | } | |
363 | ||
364 | /* Read general purpose floating point registers. */ | |
383f0f5b JB |
365 | if (tdep->ppc_fp0_regnum >= 0) |
366 | for (regno = 0; regno < ppc_num_fprs; regno++) | |
367 | fetch_register (tdep->ppc_fp0_regnum + regno); | |
7a78ae4e | 368 | |
dd7be90a KB |
369 | /* Read special registers. */ |
370 | fetch_register (PC_REGNUM); | |
371 | fetch_register (tdep->ppc_ps_regnum); | |
372 | fetch_register (tdep->ppc_cr_regnum); | |
373 | fetch_register (tdep->ppc_lr_regnum); | |
374 | fetch_register (tdep->ppc_ctr_regnum); | |
375 | fetch_register (tdep->ppc_xer_regnum); | |
383f0f5b JB |
376 | if (tdep->ppc_fpscr_regnum >= 0) |
377 | fetch_register (tdep->ppc_fpscr_regnum); | |
dd7be90a KB |
378 | if (tdep->ppc_mq_regnum >= 0) |
379 | fetch_register (tdep->ppc_mq_regnum); | |
c906108c | 380 | } |
7a78ae4e | 381 | } |
c906108c | 382 | |
7a78ae4e ND |
383 | /* Store our register values back into the inferior. |
384 | If REGNO is -1, do this for all registers. | |
385 | Otherwise, REGNO specifies which register (so we can save time). */ | |
386 | ||
387 | void | |
388 | store_inferior_registers (int regno) | |
389 | { | |
390 | if (regno != -1) | |
391 | store_register (regno); | |
392 | ||
393 | else | |
f6077098 | 394 | { |
dd7be90a KB |
395 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); |
396 | ||
397 | /* Write general purpose registers first. */ | |
398 | for (regno = tdep->ppc_gp0_regnum; | |
8bf659e8 | 399 | regno < tdep->ppc_gp0_regnum + ppc_num_gprs; |
dd7be90a KB |
400 | regno++) |
401 | { | |
402 | store_register (regno); | |
403 | } | |
7a78ae4e | 404 | |
dd7be90a | 405 | /* Write floating point registers. */ |
383f0f5b JB |
406 | if (tdep->ppc_fp0_regnum >= 0) |
407 | for (regno = 0; regno < ppc_num_fprs; regno++) | |
408 | store_register (tdep->ppc_fp0_regnum + regno); | |
7a78ae4e | 409 | |
dd7be90a KB |
410 | /* Write special registers. */ |
411 | store_register (PC_REGNUM); | |
412 | store_register (tdep->ppc_ps_regnum); | |
413 | store_register (tdep->ppc_cr_regnum); | |
414 | store_register (tdep->ppc_lr_regnum); | |
415 | store_register (tdep->ppc_ctr_regnum); | |
416 | store_register (tdep->ppc_xer_regnum); | |
383f0f5b JB |
417 | if (tdep->ppc_fpscr_regnum >= 0) |
418 | store_register (tdep->ppc_fpscr_regnum); | |
dd7be90a KB |
419 | if (tdep->ppc_mq_regnum >= 0) |
420 | store_register (tdep->ppc_mq_regnum); | |
f6077098 | 421 | } |
7a78ae4e | 422 | } |
f6077098 | 423 | |
7a78ae4e ND |
424 | /* Store in *TO the 32-bit word at 32-bit-aligned ADDR in the child |
425 | process, which is 64-bit if ARCH64 and 32-bit otherwise. Return | |
426 | success. */ | |
427 | ||
428 | static int | |
429 | read_word (CORE_ADDR from, int *to, int arch64) | |
430 | { | |
431 | /* Retrieved values may be -1, so infer errors from errno. */ | |
432 | errno = 0; | |
433 | ||
434 | if (arch64) | |
8b5790f2 | 435 | *to = rs6000_ptrace64 (PT_READ_I, PIDGET (inferior_ptid), from, 0, NULL); |
c906108c | 436 | else |
8b5790f2 | 437 | *to = rs6000_ptrace32 (PT_READ_I, PIDGET (inferior_ptid), (int *)(long) from, |
39f77062 | 438 | 0, NULL); |
c906108c | 439 | |
7a78ae4e ND |
440 | return !errno; |
441 | } | |
442 | ||
443 | /* Copy LEN bytes to or from inferior's memory starting at MEMADDR | |
444 | to debugger memory starting at MYADDR. Copy to inferior if | |
445 | WRITE is nonzero. | |
446 | ||
1df84f13 AC |
447 | Returns the length copied, which is either the LEN argument or |
448 | zero. This xfer function does not do partial moves, since | |
449 | deprecated_child_ops doesn't allow memory operations to cross below | |
450 | us in the target stack anyway. */ | |
7a78ae4e ND |
451 | |
452 | int | |
6c932e54 | 453 | child_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, |
d737ece6 PS |
454 | int write, struct mem_attrib *attrib, |
455 | struct target_ops *target) | |
7a78ae4e ND |
456 | { |
457 | /* Round starting address down to 32-bit word boundary. */ | |
458 | int mask = sizeof (int) - 1; | |
459 | CORE_ADDR addr = memaddr & ~(CORE_ADDR)mask; | |
460 | ||
461 | /* Round ending address up to 32-bit word boundary. */ | |
462 | int count = ((memaddr + len - addr + mask) & ~(CORE_ADDR)mask) | |
463 | / sizeof (int); | |
464 | ||
465 | /* Allocate word transfer buffer. */ | |
d33fc4e4 MS |
466 | /* FIXME (alloca): This code, cloned from infptrace.c, is unsafe |
467 | because it uses alloca to allocate a buffer of arbitrary size. | |
468 | For very large xfers, this could crash GDB's stack. */ | |
7a78ae4e ND |
469 | int *buf = (int *) alloca (count * sizeof (int)); |
470 | ||
471 | int arch64 = ARCH64 (); | |
472 | int i; | |
473 | ||
474 | if (!write) | |
c906108c | 475 | { |
7a78ae4e ND |
476 | /* Retrieve memory a word at a time. */ |
477 | for (i = 0; i < count; i++, addr += sizeof (int)) | |
478 | { | |
479 | if (!read_word (addr, buf + i, arch64)) | |
480 | return 0; | |
481 | QUIT; | |
482 | } | |
483 | ||
484 | /* Copy memory to supplied buffer. */ | |
485 | addr -= count * sizeof (int); | |
486 | memcpy (myaddr, (char *)buf + (memaddr - addr), len); | |
c906108c | 487 | } |
7a78ae4e ND |
488 | else |
489 | { | |
490 | /* Fetch leading memory needed for alignment. */ | |
491 | if (addr < memaddr) | |
492 | if (!read_word (addr, buf, arch64)) | |
493 | return 0; | |
494 | ||
495 | /* Fetch trailing memory needed for alignment. */ | |
496 | if (addr + count * sizeof (int) > memaddr + len) | |
a191ea8d JB |
497 | if (!read_word (addr + (count - 1) * sizeof (int), |
498 | buf + count - 1, arch64)) | |
7a78ae4e ND |
499 | return 0; |
500 | ||
501 | /* Copy supplied data into memory buffer. */ | |
502 | memcpy ((char *)buf + (memaddr - addr), myaddr, len); | |
503 | ||
504 | /* Store memory one word at a time. */ | |
505 | for (i = 0, errno = 0; i < count; i++, addr += sizeof (int)) | |
506 | { | |
507 | if (arch64) | |
8b5790f2 | 508 | rs6000_ptrace64 (PT_WRITE_D, PIDGET (inferior_ptid), addr, buf[i], NULL); |
7a78ae4e | 509 | else |
8b5790f2 | 510 | rs6000_ptrace32 (PT_WRITE_D, PIDGET (inferior_ptid), (int *)(long) addr, |
7a78ae4e ND |
511 | buf[i], NULL); |
512 | ||
513 | if (errno) | |
514 | return 0; | |
515 | QUIT; | |
516 | } | |
517 | } | |
518 | ||
519 | return len; | |
c906108c SS |
520 | } |
521 | ||
522 | /* Execute one dummy breakpoint instruction. This way we give the kernel | |
523 | a chance to do some housekeeping and update inferior's internal data, | |
524 | including u_area. */ | |
525 | ||
526 | static void | |
7a78ae4e | 527 | exec_one_dummy_insn (void) |
c906108c | 528 | { |
6f7f3f0d | 529 | #define DUMMY_INSN_ADDR gdbarch_tdep (current_gdbarch)->text_segment_base+0x200 |
c906108c | 530 | |
7a78ae4e | 531 | int ret, status, pid; |
c906108c | 532 | CORE_ADDR prev_pc; |
8181d85f | 533 | void *bp; |
c906108c SS |
534 | |
535 | /* We plant one dummy breakpoint into DUMMY_INSN_ADDR address. We | |
536 | assume that this address will never be executed again by the real | |
537 | code. */ | |
538 | ||
8181d85f | 539 | bp = deprecated_insert_raw_breakpoint (DUMMY_INSN_ADDR); |
c906108c | 540 | |
c906108c SS |
541 | /* You might think this could be done with a single ptrace call, and |
542 | you'd be correct for just about every platform I've ever worked | |
543 | on. However, rs6000-ibm-aix4.1.3 seems to have screwed this up -- | |
544 | the inferior never hits the breakpoint (it's also worth noting | |
545 | powerpc-ibm-aix4.1.3 works correctly). */ | |
546 | prev_pc = read_pc (); | |
547 | write_pc (DUMMY_INSN_ADDR); | |
7a78ae4e | 548 | if (ARCH64 ()) |
8b5790f2 | 549 | ret = rs6000_ptrace64 (PT_CONTINUE, PIDGET (inferior_ptid), 1, 0, NULL); |
7a78ae4e | 550 | else |
8b5790f2 | 551 | ret = rs6000_ptrace32 (PT_CONTINUE, PIDGET (inferior_ptid), (int *)1, 0, NULL); |
c906108c | 552 | |
7a78ae4e | 553 | if (ret != 0) |
c906108c SS |
554 | perror ("pt_continue"); |
555 | ||
c5aa993b JM |
556 | do |
557 | { | |
558 | pid = wait (&status); | |
559 | } | |
39f77062 | 560 | while (pid != PIDGET (inferior_ptid)); |
c5aa993b | 561 | |
c906108c | 562 | write_pc (prev_pc); |
8181d85f | 563 | deprecated_remove_raw_breakpoint (bp); |
c906108c SS |
564 | } |
565 | ||
7a78ae4e ND |
566 | /* Fetch registers from the register section in core bfd. */ |
567 | ||
c906108c | 568 | static void |
7a78ae4e ND |
569 | fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, |
570 | int which, CORE_ADDR reg_addr) | |
c906108c | 571 | { |
7a78ae4e | 572 | CoreRegs *regs; |
11bf77db KB |
573 | int regi; |
574 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); | |
7a78ae4e ND |
575 | |
576 | if (which != 0) | |
c906108c | 577 | { |
7a78ae4e ND |
578 | fprintf_unfiltered |
579 | (gdb_stderr, | |
580 | "Gdb error: unknown parameter to fetch_core_registers().\n"); | |
581 | return; | |
c906108c SS |
582 | } |
583 | ||
7a78ae4e | 584 | regs = (CoreRegs *) core_reg_sect; |
c906108c | 585 | |
11bf77db | 586 | /* Put the register values from the core file section in the regcache. */ |
7a78ae4e | 587 | |
11bf77db | 588 | if (ARCH64 ()) |
7a78ae4e | 589 | { |
063715bf | 590 | for (regi = 0; regi < ppc_num_gprs; regi++) |
23a6d369 AC |
591 | regcache_raw_supply (current_regcache, tdep->ppc_gp0_regnum + regi, |
592 | (char *) ®s->r64.gpr[regi]); | |
11bf77db | 593 | |
383f0f5b | 594 | if (tdep->ppc_fp0_regnum >= 0) |
063715bf | 595 | for (regi = 0; regi < ppc_num_fprs; regi++) |
23a6d369 AC |
596 | regcache_raw_supply (current_regcache, tdep->ppc_fp0_regnum + regi, |
597 | (char *) ®s->r64.fpr[regi]); | |
598 | ||
599 | regcache_raw_supply (current_regcache, PC_REGNUM, | |
600 | (char *) ®s->r64.iar); | |
601 | regcache_raw_supply (current_regcache, tdep->ppc_ps_regnum, | |
602 | (char *) ®s->r64.msr); | |
603 | regcache_raw_supply (current_regcache, tdep->ppc_cr_regnum, | |
604 | (char *) ®s->r64.cr); | |
605 | regcache_raw_supply (current_regcache, tdep->ppc_lr_regnum, | |
606 | (char *) ®s->r64.lr); | |
607 | regcache_raw_supply (current_regcache, tdep->ppc_ctr_regnum, | |
608 | (char *) ®s->r64.ctr); | |
609 | regcache_raw_supply (current_regcache, tdep->ppc_xer_regnum, | |
610 | (char *) ®s->r64.xer); | |
383f0f5b | 611 | if (tdep->ppc_fpscr_regnum >= 0) |
23a6d369 AC |
612 | regcache_raw_supply (current_regcache, tdep->ppc_fpscr_regnum, |
613 | (char *) ®s->r64.fpscr); | |
7a78ae4e | 614 | } |
c906108c | 615 | else |
7a78ae4e | 616 | { |
063715bf | 617 | for (regi = 0; regi < ppc_num_gprs; regi++) |
23a6d369 AC |
618 | regcache_raw_supply (current_regcache, tdep->ppc_gp0_regnum + regi, |
619 | (char *) ®s->r32.gpr[regi]); | |
11bf77db | 620 | |
383f0f5b | 621 | if (tdep->ppc_fp0_regnum >= 0) |
063715bf | 622 | for (regi = 0; regi < ppc_num_fprs; regi++) |
23a6d369 AC |
623 | regcache_raw_supply (current_regcache, tdep->ppc_fp0_regnum + regi, |
624 | (char *) ®s->r32.fpr[regi]); | |
625 | ||
626 | regcache_raw_supply (current_regcache, PC_REGNUM, | |
627 | (char *) ®s->r32.iar); | |
628 | regcache_raw_supply (current_regcache, tdep->ppc_ps_regnum, | |
629 | (char *) ®s->r32.msr); | |
630 | regcache_raw_supply (current_regcache, tdep->ppc_cr_regnum, | |
631 | (char *) ®s->r32.cr); | |
632 | regcache_raw_supply (current_regcache, tdep->ppc_lr_regnum, | |
633 | (char *) ®s->r32.lr); | |
634 | regcache_raw_supply (current_regcache, tdep->ppc_ctr_regnum, | |
635 | (char *) ®s->r32.ctr); | |
636 | regcache_raw_supply (current_regcache, tdep->ppc_xer_regnum, | |
637 | (char *) ®s->r32.xer); | |
383f0f5b | 638 | if (tdep->ppc_fpscr_regnum >= 0) |
23a6d369 AC |
639 | regcache_raw_supply (current_regcache, tdep->ppc_fpscr_regnum, |
640 | (char *) ®s->r32.fpscr); | |
11bf77db | 641 | if (tdep->ppc_mq_regnum >= 0) |
23a6d369 AC |
642 | regcache_raw_supply (current_regcache, tdep->ppc_mq_regnum, |
643 | (char *) ®s->r32.mq); | |
7a78ae4e | 644 | } |
c906108c SS |
645 | } |
646 | \f | |
7a78ae4e ND |
647 | |
648 | /* Copy information about text and data sections from LDI to VP for a 64-bit | |
649 | process if ARCH64 and for a 32-bit process otherwise. */ | |
650 | ||
651 | static void | |
652 | vmap_secs (struct vmap *vp, LdInfo *ldi, int arch64) | |
653 | { | |
654 | if (arch64) | |
655 | { | |
656 | vp->tstart = (CORE_ADDR) ldi->l64.ldinfo_textorg; | |
657 | vp->tend = vp->tstart + ldi->l64.ldinfo_textsize; | |
658 | vp->dstart = (CORE_ADDR) ldi->l64.ldinfo_dataorg; | |
659 | vp->dend = vp->dstart + ldi->l64.ldinfo_datasize; | |
660 | } | |
661 | else | |
662 | { | |
663 | vp->tstart = (unsigned long) ldi->l32.ldinfo_textorg; | |
664 | vp->tend = vp->tstart + ldi->l32.ldinfo_textsize; | |
665 | vp->dstart = (unsigned long) ldi->l32.ldinfo_dataorg; | |
666 | vp->dend = vp->dstart + ldi->l32.ldinfo_datasize; | |
667 | } | |
668 | ||
669 | /* The run time loader maps the file header in addition to the text | |
670 | section and returns a pointer to the header in ldinfo_textorg. | |
671 | Adjust the text start address to point to the real start address | |
672 | of the text section. */ | |
673 | vp->tstart += vp->toffs; | |
674 | } | |
675 | ||
c906108c SS |
676 | /* handle symbol translation on vmapping */ |
677 | ||
678 | static void | |
7a78ae4e | 679 | vmap_symtab (struct vmap *vp) |
c906108c | 680 | { |
52f0bd74 | 681 | struct objfile *objfile; |
c906108c SS |
682 | struct section_offsets *new_offsets; |
683 | int i; | |
c5aa993b | 684 | |
c906108c SS |
685 | objfile = vp->objfile; |
686 | if (objfile == NULL) | |
687 | { | |
688 | /* OK, it's not an objfile we opened ourselves. | |
c5aa993b JM |
689 | Currently, that can only happen with the exec file, so |
690 | relocate the symbols for the symfile. */ | |
c906108c SS |
691 | if (symfile_objfile == NULL) |
692 | return; | |
693 | objfile = symfile_objfile; | |
694 | } | |
63f58cc5 PS |
695 | else if (!vp->loaded) |
696 | /* If symbols are not yet loaded, offsets are not yet valid. */ | |
697 | return; | |
c906108c | 698 | |
9f83329d JB |
699 | new_offsets = |
700 | (struct section_offsets *) | |
701 | alloca (SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); | |
c906108c SS |
702 | |
703 | for (i = 0; i < objfile->num_sections; ++i) | |
f0a58b0b | 704 | new_offsets->offsets[i] = ANOFFSET (objfile->section_offsets, i); |
c5aa993b | 705 | |
c906108c SS |
706 | /* The symbols in the object file are linked to the VMA of the section, |
707 | relocate them VMA relative. */ | |
f0a58b0b EZ |
708 | new_offsets->offsets[SECT_OFF_TEXT (objfile)] = vp->tstart - vp->tvma; |
709 | new_offsets->offsets[SECT_OFF_DATA (objfile)] = vp->dstart - vp->dvma; | |
710 | new_offsets->offsets[SECT_OFF_BSS (objfile)] = vp->dstart - vp->dvma; | |
c906108c SS |
711 | |
712 | objfile_relocate (objfile, new_offsets); | |
713 | } | |
714 | \f | |
715 | /* Add symbols for an objfile. */ | |
716 | ||
717 | static int | |
7a78ae4e | 718 | objfile_symbol_add (void *arg) |
c906108c SS |
719 | { |
720 | struct objfile *obj = (struct objfile *) arg; | |
721 | ||
7e8580c1 | 722 | syms_from_objfile (obj, NULL, 0, 0, 0, 0); |
c906108c SS |
723 | new_symfile_objfile (obj, 0, 0); |
724 | return 1; | |
725 | } | |
726 | ||
63f58cc5 PS |
727 | /* Add symbols for a vmap. Return zero upon error. */ |
728 | ||
729 | int | |
730 | vmap_add_symbols (struct vmap *vp) | |
731 | { | |
732 | if (catch_errors (objfile_symbol_add, vp->objfile, | |
733 | "Error while reading shared library symbols:\n", | |
734 | RETURN_MASK_ALL)) | |
735 | { | |
736 | /* Note this is only done if symbol reading was successful. */ | |
737 | vp->loaded = 1; | |
738 | vmap_symtab (vp); | |
739 | return 1; | |
740 | } | |
741 | return 0; | |
742 | } | |
743 | ||
c906108c SS |
744 | /* Add a new vmap entry based on ldinfo() information. |
745 | ||
746 | If ldi->ldinfo_fd is not valid (e.g. this struct ld_info is from a | |
747 | core file), the caller should set it to -1, and we will open the file. | |
748 | ||
749 | Return the vmap new entry. */ | |
750 | ||
751 | static struct vmap * | |
7a78ae4e | 752 | add_vmap (LdInfo *ldi) |
c906108c SS |
753 | { |
754 | bfd *abfd, *last; | |
52f0bd74 | 755 | char *mem, *objname, *filename; |
c906108c SS |
756 | struct objfile *obj; |
757 | struct vmap *vp; | |
7a78ae4e ND |
758 | int fd; |
759 | ARCH64_DECL (arch64); | |
c906108c SS |
760 | |
761 | /* This ldi structure was allocated using alloca() in | |
762 | xcoff_relocate_symtab(). Now we need to have persistent object | |
763 | and member names, so we should save them. */ | |
764 | ||
7a78ae4e ND |
765 | filename = LDI_FILENAME (ldi, arch64); |
766 | mem = filename + strlen (filename) + 1; | |
c906108c | 767 | mem = savestring (mem, strlen (mem)); |
7a78ae4e | 768 | objname = savestring (filename, strlen (filename)); |
c906108c | 769 | |
7a78ae4e ND |
770 | fd = LDI_FD (ldi, arch64); |
771 | if (fd < 0) | |
c906108c SS |
772 | /* Note that this opens it once for every member; a possible |
773 | enhancement would be to only open it once for every object. */ | |
774 | abfd = bfd_openr (objname, gnutarget); | |
775 | else | |
7a78ae4e | 776 | abfd = bfd_fdopenr (objname, gnutarget, fd); |
c906108c | 777 | if (!abfd) |
63f58cc5 | 778 | { |
8a3fe4f8 | 779 | warning (_("Could not open `%s' as an executable file: %s"), |
63f58cc5 PS |
780 | objname, bfd_errmsg (bfd_get_error ())); |
781 | return NULL; | |
782 | } | |
c906108c SS |
783 | |
784 | /* make sure we have an object file */ | |
785 | ||
786 | if (bfd_check_format (abfd, bfd_object)) | |
787 | vp = map_vmap (abfd, 0); | |
788 | ||
789 | else if (bfd_check_format (abfd, bfd_archive)) | |
790 | { | |
791 | last = 0; | |
792 | /* FIXME??? am I tossing BFDs? bfd? */ | |
793 | while ((last = bfd_openr_next_archived_file (abfd, last))) | |
cb137aa5 | 794 | if (DEPRECATED_STREQ (mem, last->filename)) |
c906108c SS |
795 | break; |
796 | ||
797 | if (!last) | |
798 | { | |
8a3fe4f8 | 799 | warning (_("\"%s\": member \"%s\" missing."), objname, mem); |
c906108c | 800 | bfd_close (abfd); |
63f58cc5 | 801 | return NULL; |
c906108c SS |
802 | } |
803 | ||
c5aa993b | 804 | if (!bfd_check_format (last, bfd_object)) |
c906108c | 805 | { |
8a3fe4f8 | 806 | warning (_("\"%s\": member \"%s\" not in executable format: %s."), |
63f58cc5 PS |
807 | objname, mem, bfd_errmsg (bfd_get_error ())); |
808 | bfd_close (last); | |
809 | bfd_close (abfd); | |
810 | return NULL; | |
c906108c SS |
811 | } |
812 | ||
813 | vp = map_vmap (last, abfd); | |
814 | } | |
815 | else | |
816 | { | |
8a3fe4f8 | 817 | warning (_("\"%s\": not in executable format: %s."), |
63f58cc5 | 818 | objname, bfd_errmsg (bfd_get_error ())); |
c906108c | 819 | bfd_close (abfd); |
63f58cc5 | 820 | return NULL; |
c906108c | 821 | } |
2df3850c | 822 | obj = allocate_objfile (vp->bfd, 0); |
c906108c SS |
823 | vp->objfile = obj; |
824 | ||
63f58cc5 PS |
825 | /* Always add symbols for the main objfile. */ |
826 | if (vp == vmap || auto_solib_add) | |
827 | vmap_add_symbols (vp); | |
c906108c SS |
828 | return vp; |
829 | } | |
830 | \f | |
831 | /* update VMAP info with ldinfo() information | |
832 | Input is ptr to ldinfo() results. */ | |
833 | ||
834 | static void | |
7a78ae4e | 835 | vmap_ldinfo (LdInfo *ldi) |
c906108c SS |
836 | { |
837 | struct stat ii, vi; | |
52f0bd74 | 838 | struct vmap *vp; |
c906108c SS |
839 | int got_one, retried; |
840 | int got_exec_file = 0; | |
7a78ae4e ND |
841 | uint next; |
842 | int arch64 = ARCH64 (); | |
c906108c SS |
843 | |
844 | /* For each *ldi, see if we have a corresponding *vp. | |
845 | If so, update the mapping, and symbol table. | |
846 | If not, add an entry and symbol table. */ | |
847 | ||
c5aa993b JM |
848 | do |
849 | { | |
7a78ae4e | 850 | char *name = LDI_FILENAME (ldi, arch64); |
c5aa993b | 851 | char *memb = name + strlen (name) + 1; |
7a78ae4e | 852 | int fd = LDI_FD (ldi, arch64); |
c5aa993b JM |
853 | |
854 | retried = 0; | |
855 | ||
7a78ae4e | 856 | if (fstat (fd, &ii) < 0) |
c5aa993b JM |
857 | { |
858 | /* The kernel sets ld_info to -1, if the process is still using the | |
859 | object, and the object is removed. Keep the symbol info for the | |
860 | removed object and issue a warning. */ | |
8a3fe4f8 | 861 | warning (_("%s (fd=%d) has disappeared, keeping its symbols"), |
7a78ae4e | 862 | name, fd); |
c906108c | 863 | continue; |
c5aa993b JM |
864 | } |
865 | retry: | |
866 | for (got_one = 0, vp = vmap; vp; vp = vp->nxt) | |
867 | { | |
868 | struct objfile *objfile; | |
c906108c | 869 | |
c5aa993b JM |
870 | /* First try to find a `vp', which is the same as in ldinfo. |
871 | If not the same, just continue and grep the next `vp'. If same, | |
872 | relocate its tstart, tend, dstart, dend values. If no such `vp' | |
873 | found, get out of this for loop, add this ldi entry as a new vmap | |
874 | (add_vmap) and come back, find its `vp' and so on... */ | |
875 | ||
876 | /* The filenames are not always sufficient to match on. */ | |
877 | ||
cb137aa5 AC |
878 | if ((name[0] == '/' && !DEPRECATED_STREQ (name, vp->name)) |
879 | || (memb[0] && !DEPRECATED_STREQ (memb, vp->member))) | |
c906108c | 880 | continue; |
c906108c | 881 | |
c5aa993b JM |
882 | /* See if we are referring to the same file. |
883 | We have to check objfile->obfd, symfile.c:reread_symbols might | |
884 | have updated the obfd after a change. */ | |
885 | objfile = vp->objfile == NULL ? symfile_objfile : vp->objfile; | |
886 | if (objfile == NULL | |
887 | || objfile->obfd == NULL | |
888 | || bfd_stat (objfile->obfd, &vi) < 0) | |
889 | { | |
8a3fe4f8 | 890 | warning (_("Unable to stat %s, keeping its symbols"), name); |
c5aa993b JM |
891 | continue; |
892 | } | |
c906108c | 893 | |
c5aa993b JM |
894 | if (ii.st_dev != vi.st_dev || ii.st_ino != vi.st_ino) |
895 | continue; | |
c906108c | 896 | |
c5aa993b | 897 | if (!retried) |
7a78ae4e | 898 | close (fd); |
c906108c | 899 | |
c5aa993b | 900 | ++got_one; |
c906108c | 901 | |
c5aa993b | 902 | /* Found a corresponding VMAP. Remap! */ |
c906108c | 903 | |
7a78ae4e | 904 | vmap_secs (vp, ldi, arch64); |
c906108c | 905 | |
c5aa993b JM |
906 | /* The objfile is only NULL for the exec file. */ |
907 | if (vp->objfile == NULL) | |
908 | got_exec_file = 1; | |
c906108c | 909 | |
c5aa993b JM |
910 | /* relocate symbol table(s). */ |
911 | vmap_symtab (vp); | |
c906108c | 912 | |
e42dc924 | 913 | /* Announce new object files. Doing this after symbol relocation |
2ec664f5 | 914 | makes aix-thread.c's job easier. */ |
9a4105ab AC |
915 | if (deprecated_target_new_objfile_hook && vp->objfile) |
916 | deprecated_target_new_objfile_hook (vp->objfile); | |
e42dc924 | 917 | |
c5aa993b JM |
918 | /* There may be more, so we don't break out of the loop. */ |
919 | } | |
920 | ||
921 | /* if there was no matching *vp, we must perforce create the sucker(s) */ | |
922 | if (!got_one && !retried) | |
923 | { | |
924 | add_vmap (ldi); | |
925 | ++retried; | |
926 | goto retry; | |
927 | } | |
928 | } | |
7a78ae4e ND |
929 | while ((next = LDI_NEXT (ldi, arch64)) |
930 | && (ldi = (void *) (next + (char *) ldi))); | |
c906108c SS |
931 | |
932 | /* If we don't find the symfile_objfile anywhere in the ldinfo, it | |
933 | is unlikely that the symbol file is relocated to the proper | |
934 | address. And we might have attached to a process which is | |
935 | running a different copy of the same executable. */ | |
936 | if (symfile_objfile != NULL && !got_exec_file) | |
937 | { | |
8a3fe4f8 | 938 | warning (_("Symbol file %s\nis not mapped; discarding it.\n\ |
c906108c SS |
939 | If in fact that file has symbols which the mapped files listed by\n\ |
940 | \"info files\" lack, you can load symbols with the \"symbol-file\" or\n\ | |
941 | \"add-symbol-file\" commands (note that you must take care of relocating\n\ | |
8a3fe4f8 | 942 | symbols to the proper address)."), |
f5a96129 | 943 | symfile_objfile->name); |
c906108c SS |
944 | free_objfile (symfile_objfile); |
945 | symfile_objfile = NULL; | |
946 | } | |
947 | breakpoint_re_set (); | |
948 | } | |
949 | \f | |
950 | /* As well as symbol tables, exec_sections need relocation. After | |
951 | the inferior process' termination, there will be a relocated symbol | |
952 | table exist with no corresponding inferior process. At that time, we | |
953 | need to use `exec' bfd, rather than the inferior process's memory space | |
954 | to look up symbols. | |
955 | ||
956 | `exec_sections' need to be relocated only once, as long as the exec | |
957 | file remains unchanged. | |
c5aa993b | 958 | */ |
c906108c SS |
959 | |
960 | static void | |
7a78ae4e | 961 | vmap_exec (void) |
c906108c SS |
962 | { |
963 | static bfd *execbfd; | |
964 | int i; | |
965 | ||
966 | if (execbfd == exec_bfd) | |
967 | return; | |
968 | ||
969 | execbfd = exec_bfd; | |
970 | ||
971 | if (!vmap || !exec_ops.to_sections) | |
8a3fe4f8 | 972 | error (_("vmap_exec: vmap or exec_ops.to_sections == 0.")); |
c906108c | 973 | |
c5aa993b | 974 | for (i = 0; &exec_ops.to_sections[i] < exec_ops.to_sections_end; i++) |
c906108c | 975 | { |
cb137aa5 | 976 | if (DEPRECATED_STREQ (".text", exec_ops.to_sections[i].the_bfd_section->name)) |
c906108c SS |
977 | { |
978 | exec_ops.to_sections[i].addr += vmap->tstart - vmap->tvma; | |
979 | exec_ops.to_sections[i].endaddr += vmap->tstart - vmap->tvma; | |
980 | } | |
cb137aa5 | 981 | else if (DEPRECATED_STREQ (".data", exec_ops.to_sections[i].the_bfd_section->name)) |
c906108c SS |
982 | { |
983 | exec_ops.to_sections[i].addr += vmap->dstart - vmap->dvma; | |
984 | exec_ops.to_sections[i].endaddr += vmap->dstart - vmap->dvma; | |
985 | } | |
cb137aa5 | 986 | else if (DEPRECATED_STREQ (".bss", exec_ops.to_sections[i].the_bfd_section->name)) |
c906108c SS |
987 | { |
988 | exec_ops.to_sections[i].addr += vmap->dstart - vmap->dvma; | |
989 | exec_ops.to_sections[i].endaddr += vmap->dstart - vmap->dvma; | |
990 | } | |
991 | } | |
992 | } | |
7a78ae4e ND |
993 | |
994 | /* Set the current architecture from the host running GDB. Called when | |
995 | starting a child process. */ | |
996 | ||
6f7f3f0d UW |
997 | void |
998 | rs6000_create_inferior (int pid) | |
7a78ae4e ND |
999 | { |
1000 | enum bfd_architecture arch; | |
1001 | unsigned long mach; | |
1002 | bfd abfd; | |
1003 | struct gdbarch_info info; | |
1004 | ||
1005 | if (__power_rs ()) | |
1006 | { | |
1007 | arch = bfd_arch_rs6000; | |
1008 | mach = bfd_mach_rs6k; | |
1009 | } | |
1010 | else | |
1011 | { | |
1012 | arch = bfd_arch_powerpc; | |
1013 | mach = bfd_mach_ppc; | |
1014 | } | |
19caaa45 PS |
1015 | |
1016 | /* FIXME: schauer/2002-02-25: | |
1017 | We don't know if we are executing a 32 or 64 bit executable, | |
1018 | and have no way to pass the proper word size to rs6000_gdbarch_init. | |
1019 | So we have to avoid switching to a new architecture, if the architecture | |
1020 | matches already. | |
1021 | Blindly calling rs6000_gdbarch_init used to work in older versions of | |
1022 | GDB, as rs6000_gdbarch_init incorrectly used the previous tdep to | |
1023 | determine the wordsize. */ | |
1024 | if (exec_bfd) | |
1025 | { | |
1026 | const struct bfd_arch_info *exec_bfd_arch_info; | |
1027 | ||
1028 | exec_bfd_arch_info = bfd_get_arch_info (exec_bfd); | |
1029 | if (arch == exec_bfd_arch_info->arch) | |
1030 | return; | |
1031 | } | |
1032 | ||
7a78ae4e ND |
1033 | bfd_default_set_arch_mach (&abfd, arch, mach); |
1034 | ||
fb6ecb0f | 1035 | gdbarch_info_init (&info); |
7a78ae4e | 1036 | info.bfd_arch_info = bfd_get_arch_info (&abfd); |
7aea86e6 | 1037 | info.abfd = exec_bfd; |
7a78ae4e | 1038 | |
16f33e29 | 1039 | if (!gdbarch_update_p (info)) |
e2e0b3e5 | 1040 | internal_error (__FILE__, __LINE__, |
6f7f3f0d | 1041 | _("rs6000_create_inferior: failed to select architecture")); |
7a78ae4e ND |
1042 | } |
1043 | ||
c906108c | 1044 | \f |
c5aa993b | 1045 | /* xcoff_relocate_symtab - hook for symbol table relocation. |
2ec664f5 | 1046 | also reads shared libraries. */ |
c906108c SS |
1047 | |
1048 | void | |
7a78ae4e | 1049 | xcoff_relocate_symtab (unsigned int pid) |
c906108c | 1050 | { |
c18e0d23 | 1051 | int load_segs = 64; /* number of load segments */ |
380b774b | 1052 | int rc; |
7a78ae4e ND |
1053 | LdInfo *ldi = NULL; |
1054 | int arch64 = ARCH64 (); | |
1055 | int ldisize = arch64 ? sizeof (ldi->l64) : sizeof (ldi->l32); | |
1056 | int size; | |
c906108c | 1057 | |
c18e0d23 GM |
1058 | do |
1059 | { | |
7a78ae4e | 1060 | size = load_segs * ldisize; |
3a84337c | 1061 | ldi = (void *) xrealloc (ldi, size); |
c906108c | 1062 | |
7a78ae4e | 1063 | #if 0 |
380b774b GM |
1064 | /* According to my humble theory, AIX has some timing problems and |
1065 | when the user stack grows, kernel doesn't update stack info in time | |
1066 | and ptrace calls step on user stack. That is why we sleep here a | |
1067 | little, and give kernel to update its internals. */ | |
380b774b | 1068 | usleep (36000); |
7a78ae4e ND |
1069 | #endif |
1070 | ||
1071 | if (arch64) | |
8b5790f2 | 1072 | rc = rs6000_ptrace64 (PT_LDINFO, pid, (unsigned long) ldi, size, NULL); |
7a78ae4e | 1073 | else |
8b5790f2 | 1074 | rc = rs6000_ptrace32 (PT_LDINFO, pid, (int *) ldi, size, NULL); |
c906108c | 1075 | |
c18e0d23 GM |
1076 | if (rc == -1) |
1077 | { | |
380b774b GM |
1078 | if (errno == ENOMEM) |
1079 | load_segs *= 2; | |
1080 | else | |
e2e0b3e5 | 1081 | perror_with_name (_("ptrace ldinfo")); |
c18e0d23 GM |
1082 | } |
1083 | else | |
1084 | { | |
380b774b GM |
1085 | vmap_ldinfo (ldi); |
1086 | vmap_exec (); /* relocate the exec and core sections as well. */ | |
c18e0d23 GM |
1087 | } |
1088 | } while (rc == -1); | |
380b774b | 1089 | if (ldi) |
b8c9b27d | 1090 | xfree (ldi); |
c906108c SS |
1091 | } |
1092 | \f | |
1093 | /* Core file stuff. */ | |
1094 | ||
1095 | /* Relocate symtabs and read in shared library info, based on symbols | |
1096 | from the core file. */ | |
1097 | ||
1098 | void | |
7a78ae4e | 1099 | xcoff_relocate_core (struct target_ops *target) |
c906108c | 1100 | { |
7be0c536 | 1101 | struct bfd_section *ldinfo_sec; |
c906108c | 1102 | int offset = 0; |
7a78ae4e | 1103 | LdInfo *ldi; |
c906108c | 1104 | struct vmap *vp; |
7a78ae4e ND |
1105 | int arch64 = ARCH64 (); |
1106 | ||
1107 | /* Size of a struct ld_info except for the variable-length filename. */ | |
1108 | int nonfilesz = (int)LDI_FILENAME ((LdInfo *)0, arch64); | |
c906108c SS |
1109 | |
1110 | /* Allocated size of buffer. */ | |
7a78ae4e | 1111 | int buffer_size = nonfilesz; |
c906108c SS |
1112 | char *buffer = xmalloc (buffer_size); |
1113 | struct cleanup *old = make_cleanup (free_current_contents, &buffer); | |
c5aa993b | 1114 | |
c906108c SS |
1115 | ldinfo_sec = bfd_get_section_by_name (core_bfd, ".ldinfo"); |
1116 | if (ldinfo_sec == NULL) | |
1117 | { | |
1118 | bfd_err: | |
1119 | fprintf_filtered (gdb_stderr, "Couldn't get ldinfo from core file: %s\n", | |
1120 | bfd_errmsg (bfd_get_error ())); | |
1121 | do_cleanups (old); | |
1122 | return; | |
1123 | } | |
1124 | do | |
1125 | { | |
1126 | int i; | |
1127 | int names_found = 0; | |
1128 | ||
1129 | /* Read in everything but the name. */ | |
1130 | if (bfd_get_section_contents (core_bfd, ldinfo_sec, buffer, | |
7a78ae4e | 1131 | offset, nonfilesz) == 0) |
c906108c SS |
1132 | goto bfd_err; |
1133 | ||
1134 | /* Now the name. */ | |
7a78ae4e | 1135 | i = nonfilesz; |
c906108c SS |
1136 | do |
1137 | { | |
1138 | if (i == buffer_size) | |
1139 | { | |
1140 | buffer_size *= 2; | |
1141 | buffer = xrealloc (buffer, buffer_size); | |
1142 | } | |
1143 | if (bfd_get_section_contents (core_bfd, ldinfo_sec, &buffer[i], | |
1144 | offset + i, 1) == 0) | |
1145 | goto bfd_err; | |
1146 | if (buffer[i++] == '\0') | |
1147 | ++names_found; | |
c5aa993b JM |
1148 | } |
1149 | while (names_found < 2); | |
c906108c | 1150 | |
7a78ae4e | 1151 | ldi = (LdInfo *) buffer; |
c906108c SS |
1152 | |
1153 | /* Can't use a file descriptor from the core file; need to open it. */ | |
7a78ae4e ND |
1154 | if (arch64) |
1155 | ldi->l64.ldinfo_fd = -1; | |
1156 | else | |
1157 | ldi->l32.ldinfo_fd = -1; | |
c5aa993b | 1158 | |
c906108c | 1159 | /* The first ldinfo is for the exec file, allocated elsewhere. */ |
63f58cc5 | 1160 | if (offset == 0 && vmap != NULL) |
c906108c SS |
1161 | vp = vmap; |
1162 | else | |
7a78ae4e | 1163 | vp = add_vmap (ldi); |
c906108c | 1164 | |
63f58cc5 | 1165 | /* Process next shared library upon error. */ |
7a78ae4e | 1166 | offset += LDI_NEXT (ldi, arch64); |
63f58cc5 PS |
1167 | if (vp == NULL) |
1168 | continue; | |
1169 | ||
7a78ae4e | 1170 | vmap_secs (vp, ldi, arch64); |
c906108c SS |
1171 | |
1172 | /* Unless this is the exec file, | |
c5aa993b | 1173 | add our sections to the section table for the core target. */ |
c906108c SS |
1174 | if (vp != vmap) |
1175 | { | |
c906108c | 1176 | struct section_table *stp; |
6426a772 JM |
1177 | |
1178 | target_resize_to_sections (target, 2); | |
c906108c SS |
1179 | stp = target->to_sections_end - 2; |
1180 | ||
1181 | stp->bfd = vp->bfd; | |
1182 | stp->the_bfd_section = bfd_get_section_by_name (stp->bfd, ".text"); | |
1183 | stp->addr = vp->tstart; | |
1184 | stp->endaddr = vp->tend; | |
1185 | stp++; | |
c5aa993b | 1186 | |
c906108c SS |
1187 | stp->bfd = vp->bfd; |
1188 | stp->the_bfd_section = bfd_get_section_by_name (stp->bfd, ".data"); | |
1189 | stp->addr = vp->dstart; | |
1190 | stp->endaddr = vp->dend; | |
1191 | } | |
1192 | ||
1193 | vmap_symtab (vp); | |
e42dc924 | 1194 | |
9a4105ab AC |
1195 | if (deprecated_target_new_objfile_hook && vp != vmap && vp->objfile) |
1196 | deprecated_target_new_objfile_hook (vp->objfile); | |
c5aa993b | 1197 | } |
7a78ae4e | 1198 | while (LDI_NEXT (ldi, arch64) != 0); |
c906108c SS |
1199 | vmap_exec (); |
1200 | breakpoint_re_set (); | |
1201 | do_cleanups (old); | |
1202 | } | |
1203 | ||
1204 | int | |
7a78ae4e | 1205 | kernel_u_size (void) |
c906108c SS |
1206 | { |
1207 | return (sizeof (struct user)); | |
1208 | } | |
1209 | \f | |
1210 | /* Under AIX, we have to pass the correct TOC pointer to a function | |
1211 | when calling functions in the inferior. | |
1212 | We try to find the relative toc offset of the objfile containing PC | |
1213 | and add the current load address of the data segment from the vmap. */ | |
1214 | ||
1215 | static CORE_ADDR | |
7a78ae4e | 1216 | find_toc_address (CORE_ADDR pc) |
c906108c SS |
1217 | { |
1218 | struct vmap *vp; | |
7a78ae4e | 1219 | extern CORE_ADDR get_toc_offset (struct objfile *); /* xcoffread.c */ |
c906108c SS |
1220 | |
1221 | for (vp = vmap; vp; vp = vp->nxt) | |
1222 | { | |
1223 | if (pc >= vp->tstart && pc < vp->tend) | |
1224 | { | |
1225 | /* vp->objfile is only NULL for the exec file. */ | |
1226 | return vp->dstart + get_toc_offset (vp->objfile == NULL | |
1227 | ? symfile_objfile | |
1228 | : vp->objfile); | |
1229 | } | |
1230 | } | |
8a3fe4f8 | 1231 | error (_("Unable to find TOC entry for pc %s."), hex_string (pc)); |
c906108c SS |
1232 | } |
1233 | \f | |
1234 | /* Register that we are able to handle rs6000 core file formats. */ | |
1235 | ||
1236 | static struct core_fns rs6000_core_fns = | |
1237 | { | |
7a78ae4e | 1238 | bfd_target_xcoff_flavour, /* core_flavour */ |
2acceee2 JM |
1239 | default_check_format, /* check_format */ |
1240 | default_core_sniffer, /* core_sniffer */ | |
1241 | fetch_core_registers, /* core_read_registers */ | |
1242 | NULL /* next */ | |
c906108c SS |
1243 | }; |
1244 | ||
1245 | void | |
7a78ae4e | 1246 | _initialize_core_rs6000 (void) |
c906108c | 1247 | { |
2ec664f5 MS |
1248 | /* Initialize hook in rs6000-tdep.c for determining the TOC address |
1249 | when calling functions in the inferior. */ | |
7a78ae4e ND |
1250 | rs6000_find_toc_address_hook = find_toc_address; |
1251 | ||
00e32a35 | 1252 | deprecated_add_core_fns (&rs6000_core_fns); |
c906108c | 1253 | } |