Commit | Line | Data |
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c906108c | 1 | /* IBM RS/6000 native-dependent code for GDB, the GNU debugger. |
4646aa9d | 2 | |
6aba47ca | 3 | Copyright (C) 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997, |
9b254dd1 | 4 | 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2007, 2008 |
6aba47ca | 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 | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 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 | 19 | You should have received a copy of the GNU General Public License |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
21 | |
22 | #include "defs.h" | |
23 | #include "inferior.h" | |
24 | #include "target.h" | |
25 | #include "gdbcore.h" | |
26 | #include "xcoffsolib.h" | |
27 | #include "symfile.h" | |
28 | #include "objfiles.h" | |
42203e46 | 29 | #include "libbfd.h" /* For bfd_default_set_arch_mach (FIXME) */ |
c906108c | 30 | #include "bfd.h" |
60250e8b | 31 | #include "exceptions.h" |
c906108c | 32 | #include "gdb-stabs.h" |
4e052eda | 33 | #include "regcache.h" |
19caaa45 | 34 | #include "arch-utils.h" |
037a727e | 35 | #include "inf-ptrace.h" |
11bf77db | 36 | #include "ppc-tdep.h" |
6f7f3f0d | 37 | #include "rs6000-tdep.h" |
4646aa9d | 38 | #include "exec.h" |
06d3b283 | 39 | #include "observer.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 | ||
7a78ae4e ND |
80 | /* Union of 32-bit and 64-bit versions of ld_info. */ |
81 | ||
82 | typedef union { | |
83 | #ifndef ARCH3264 | |
84 | struct ld_info l32; | |
85 | struct ld_info l64; | |
86 | #else | |
87 | struct __ld_info32 l32; | |
88 | struct __ld_info64 l64; | |
89 | #endif | |
90 | } LdInfo; | |
91 | ||
92 | /* If compiling with 32-bit and 64-bit debugging capability (e.g. AIX 4.x), | |
93 | declare and initialize a variable named VAR suitable for use as the arch64 | |
94 | parameter to the various LDI_*() macros. */ | |
95 | ||
96 | #ifndef ARCH3264 | |
97 | # define ARCH64_DECL(var) | |
98 | #else | |
99 | # define ARCH64_DECL(var) int var = ARCH64 () | |
100 | #endif | |
101 | ||
102 | /* Return LDI's FIELD for a 64-bit process if ARCH64 and for a 32-bit process | |
103 | otherwise. This technique only works for FIELDs with the same data type in | |
104 | 32-bit and 64-bit versions of ld_info. */ | |
105 | ||
106 | #ifndef ARCH3264 | |
107 | # define LDI_FIELD(ldi, arch64, field) (ldi)->l32.ldinfo_##field | |
108 | #else | |
109 | # define LDI_FIELD(ldi, arch64, field) \ | |
110 | (arch64 ? (ldi)->l64.ldinfo_##field : (ldi)->l32.ldinfo_##field) | |
111 | #endif | |
112 | ||
113 | /* Return various LDI fields for a 64-bit process if ARCH64 and for a 32-bit | |
114 | process otherwise. */ | |
115 | ||
116 | #define LDI_NEXT(ldi, arch64) LDI_FIELD(ldi, arch64, next) | |
117 | #define LDI_FD(ldi, arch64) LDI_FIELD(ldi, arch64, fd) | |
118 | #define LDI_FILENAME(ldi, arch64) LDI_FIELD(ldi, arch64, filename) | |
c906108c | 119 | |
a14ed312 | 120 | extern struct vmap *map_vmap (bfd * bf, bfd * arch); |
c906108c | 121 | |
a14ed312 | 122 | static void vmap_exec (void); |
c906108c | 123 | |
7a78ae4e | 124 | static void vmap_ldinfo (LdInfo *); |
c906108c | 125 | |
7a78ae4e | 126 | static struct vmap *add_vmap (LdInfo *); |
c906108c | 127 | |
7a78ae4e | 128 | static int objfile_symbol_add (void *); |
c906108c | 129 | |
a14ed312 | 130 | static void vmap_symtab (struct vmap *); |
c906108c | 131 | |
206988c4 | 132 | static void exec_one_dummy_insn (struct gdbarch *); |
c906108c | 133 | |
570b8f7c | 134 | extern void fixup_breakpoints (CORE_ADDR low, CORE_ADDR high, CORE_ADDR delta); |
c906108c | 135 | |
dd7be90a KB |
136 | /* Given REGNO, a gdb register number, return the corresponding |
137 | number suitable for use as a ptrace() parameter. Return -1 if | |
138 | there's no suitable mapping. Also, set the int pointed to by | |
139 | ISFLOAT to indicate whether REGNO is a floating point register. */ | |
c906108c | 140 | |
dd7be90a | 141 | static int |
206988c4 | 142 | regmap (struct gdbarch *gdbarch, int regno, int *isfloat) |
c5aa993b | 143 | { |
206988c4 | 144 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
dd7be90a KB |
145 | |
146 | *isfloat = 0; | |
8bf659e8 JB |
147 | if (tdep->ppc_gp0_regnum <= regno |
148 | && regno < tdep->ppc_gp0_regnum + ppc_num_gprs) | |
dd7be90a | 149 | return regno; |
383f0f5b JB |
150 | else if (tdep->ppc_fp0_regnum >= 0 |
151 | && tdep->ppc_fp0_regnum <= regno | |
366f009f | 152 | && regno < tdep->ppc_fp0_regnum + ppc_num_fprs) |
dd7be90a KB |
153 | { |
154 | *isfloat = 1; | |
366f009f | 155 | return regno - tdep->ppc_fp0_regnum + FPR0; |
dd7be90a | 156 | } |
206988c4 | 157 | else if (regno == gdbarch_pc_regnum (gdbarch)) |
dd7be90a KB |
158 | return IAR; |
159 | else if (regno == tdep->ppc_ps_regnum) | |
160 | return MSR; | |
161 | else if (regno == tdep->ppc_cr_regnum) | |
162 | return CR; | |
163 | else if (regno == tdep->ppc_lr_regnum) | |
164 | return LR; | |
165 | else if (regno == tdep->ppc_ctr_regnum) | |
166 | return CTR; | |
167 | else if (regno == tdep->ppc_xer_regnum) | |
168 | return XER; | |
383f0f5b JB |
169 | else if (tdep->ppc_fpscr_regnum >= 0 |
170 | && regno == tdep->ppc_fpscr_regnum) | |
0e061eef | 171 | return FPSCR; |
dd7be90a KB |
172 | else if (tdep->ppc_mq_regnum >= 0 && regno == tdep->ppc_mq_regnum) |
173 | return MQ; | |
174 | else | |
175 | return -1; | |
176 | } | |
c906108c | 177 | |
7a78ae4e | 178 | /* Call ptrace(REQ, ID, ADDR, DATA, BUF). */ |
c906108c | 179 | |
7a78ae4e | 180 | static int |
8b5790f2 | 181 | rs6000_ptrace32 (int req, int id, int *addr, int data, int *buf) |
7a78ae4e ND |
182 | { |
183 | int ret = ptrace (req, id, (int *)addr, data, buf); | |
184 | #if 0 | |
8b5790f2 | 185 | printf ("rs6000_ptrace32 (%d, %d, 0x%x, %08x, 0x%x) = 0x%x\n", |
7a78ae4e ND |
186 | req, id, (unsigned int)addr, data, (unsigned int)buf, ret); |
187 | #endif | |
188 | return ret; | |
189 | } | |
c906108c | 190 | |
7a78ae4e | 191 | /* Call ptracex(REQ, ID, ADDR, DATA, BUF). */ |
c906108c | 192 | |
7a78ae4e | 193 | static int |
0d16ee5d | 194 | rs6000_ptrace64 (int req, int id, long long addr, int data, void *buf) |
7a78ae4e ND |
195 | { |
196 | #ifdef ARCH3264 | |
197 | int ret = ptracex (req, id, addr, data, buf); | |
198 | #else | |
199 | int ret = 0; | |
200 | #endif | |
201 | #if 0 | |
8b5790f2 | 202 | printf ("rs6000_ptrace64 (%d, %d, 0x%llx, %08x, 0x%x) = 0x%x\n", |
7a78ae4e ND |
203 | req, id, addr, data, (unsigned int)buf, ret); |
204 | #endif | |
205 | return ret; | |
206 | } | |
c906108c | 207 | |
7a78ae4e | 208 | /* Fetch register REGNO from the inferior. */ |
c906108c | 209 | |
7a78ae4e | 210 | static void |
56be3814 | 211 | fetch_register (struct regcache *regcache, int regno) |
7a78ae4e | 212 | { |
8b164abb | 213 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
d9d9c31f | 214 | int addr[MAX_REGISTER_SIZE]; |
dd7be90a | 215 | int nr, isfloat; |
c906108c | 216 | |
7a78ae4e ND |
217 | /* Retrieved values may be -1, so infer errors from errno. */ |
218 | errno = 0; | |
c906108c | 219 | |
206988c4 | 220 | nr = regmap (gdbarch, regno, &isfloat); |
dd7be90a | 221 | |
7a78ae4e | 222 | /* Floating-point registers. */ |
dd7be90a KB |
223 | if (isfloat) |
224 | rs6000_ptrace32 (PT_READ_FPR, PIDGET (inferior_ptid), addr, nr, 0); | |
c906108c | 225 | |
7a78ae4e | 226 | /* Bogus register number. */ |
dd7be90a | 227 | else if (nr < 0) |
2a18e3d9 | 228 | { |
8b164abb | 229 | if (regno >= gdbarch_num_regs (gdbarch)) |
2a18e3d9 EZ |
230 | fprintf_unfiltered (gdb_stderr, |
231 | "gdb error: register no %d not implemented.\n", | |
232 | regno); | |
dd7be90a | 233 | return; |
2a18e3d9 | 234 | } |
c906108c | 235 | |
7a78ae4e ND |
236 | /* Fixed-point registers. */ |
237 | else | |
238 | { | |
7a78ae4e | 239 | if (!ARCH64 ()) |
8b5790f2 | 240 | *addr = rs6000_ptrace32 (PT_READ_GPR, PIDGET (inferior_ptid), (int *)nr, 0, 0); |
7a78ae4e ND |
241 | else |
242 | { | |
243 | /* PT_READ_GPR requires the buffer parameter to point to long long, | |
244 | even if the register is really only 32 bits. */ | |
245 | long long buf; | |
0d16ee5d | 246 | rs6000_ptrace64 (PT_READ_GPR, PIDGET (inferior_ptid), nr, 0, &buf); |
8b164abb | 247 | if (register_size (gdbarch, regno) == 8) |
7a78ae4e ND |
248 | memcpy (addr, &buf, 8); |
249 | else | |
250 | *addr = buf; | |
251 | } | |
252 | } | |
253 | ||
254 | if (!errno) | |
56be3814 | 255 | regcache_raw_supply (regcache, regno, (char *) addr); |
7a78ae4e ND |
256 | else |
257 | { | |
258 | #if 0 | |
259 | /* FIXME: this happens 3 times at the start of each 64-bit program. */ | |
260 | perror ("ptrace read"); | |
261 | #endif | |
262 | errno = 0; | |
263 | } | |
c906108c SS |
264 | } |
265 | ||
7a78ae4e | 266 | /* Store register REGNO back into the inferior. */ |
c906108c | 267 | |
7a78ae4e | 268 | static void |
56be3814 | 269 | store_register (const struct regcache *regcache, int regno) |
c906108c | 270 | { |
8b164abb | 271 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
d9d9c31f | 272 | int addr[MAX_REGISTER_SIZE]; |
dd7be90a | 273 | int nr, isfloat; |
c906108c | 274 | |
11bf77db | 275 | /* Fetch the register's value from the register cache. */ |
56be3814 | 276 | regcache_raw_collect (regcache, regno, addr); |
11bf77db | 277 | |
7a78ae4e | 278 | /* -1 can be a successful return value, so infer errors from errno. */ |
c906108c SS |
279 | errno = 0; |
280 | ||
206988c4 | 281 | nr = regmap (gdbarch, regno, &isfloat); |
dd7be90a | 282 | |
7a78ae4e | 283 | /* Floating-point registers. */ |
dd7be90a KB |
284 | if (isfloat) |
285 | rs6000_ptrace32 (PT_WRITE_FPR, PIDGET (inferior_ptid), addr, nr, 0); | |
c906108c | 286 | |
7a78ae4e | 287 | /* Bogus register number. */ |
dd7be90a | 288 | else if (nr < 0) |
7a78ae4e | 289 | { |
8b164abb | 290 | if (regno >= gdbarch_num_regs (gdbarch)) |
7a78ae4e ND |
291 | fprintf_unfiltered (gdb_stderr, |
292 | "gdb error: register no %d not implemented.\n", | |
293 | regno); | |
294 | } | |
c906108c | 295 | |
7a78ae4e ND |
296 | /* Fixed-point registers. */ |
297 | else | |
298 | { | |
8b164abb | 299 | if (regno == gdbarch_sp_regnum (gdbarch)) |
7a78ae4e ND |
300 | /* Execute one dummy instruction (which is a breakpoint) in inferior |
301 | process to give kernel a chance to do internal housekeeping. | |
302 | Otherwise the following ptrace(2) calls will mess up user stack | |
303 | since kernel will get confused about the bottom of the stack | |
304 | (%sp). */ | |
206988c4 | 305 | exec_one_dummy_insn (gdbarch); |
c906108c | 306 | |
11bf77db KB |
307 | /* The PT_WRITE_GPR operation is rather odd. For 32-bit inferiors, |
308 | the register's value is passed by value, but for 64-bit inferiors, | |
309 | the address of a buffer containing the value is passed. */ | |
7a78ae4e | 310 | if (!ARCH64 ()) |
8b5790f2 | 311 | rs6000_ptrace32 (PT_WRITE_GPR, PIDGET (inferior_ptid), (int *)nr, *addr, 0); |
7a78ae4e | 312 | else |
c906108c | 313 | { |
7a78ae4e ND |
314 | /* PT_WRITE_GPR requires the buffer parameter to point to an 8-byte |
315 | area, even if the register is really only 32 bits. */ | |
316 | long long buf; | |
8b164abb | 317 | if (register_size (gdbarch, regno) == 8) |
7a78ae4e ND |
318 | memcpy (&buf, addr, 8); |
319 | else | |
320 | buf = *addr; | |
0d16ee5d | 321 | rs6000_ptrace64 (PT_WRITE_GPR, PIDGET (inferior_ptid), nr, 0, &buf); |
c906108c SS |
322 | } |
323 | } | |
324 | ||
7a78ae4e | 325 | if (errno) |
c906108c | 326 | { |
7a78ae4e ND |
327 | perror ("ptrace write"); |
328 | errno = 0; | |
c906108c | 329 | } |
7a78ae4e | 330 | } |
c906108c | 331 | |
7a78ae4e ND |
332 | /* Read from the inferior all registers if REGNO == -1 and just register |
333 | REGNO otherwise. */ | |
c906108c | 334 | |
037a727e | 335 | static void |
56be3814 | 336 | rs6000_fetch_inferior_registers (struct regcache *regcache, int regno) |
7a78ae4e | 337 | { |
8b164abb | 338 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
7a78ae4e | 339 | if (regno != -1) |
56be3814 | 340 | fetch_register (regcache, regno); |
7a78ae4e ND |
341 | |
342 | else | |
c906108c | 343 | { |
8b164abb | 344 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
7a78ae4e | 345 | |
dd7be90a KB |
346 | /* Read 32 general purpose registers. */ |
347 | for (regno = tdep->ppc_gp0_regnum; | |
8bf659e8 | 348 | regno < tdep->ppc_gp0_regnum + ppc_num_gprs; |
dd7be90a KB |
349 | regno++) |
350 | { | |
56be3814 | 351 | fetch_register (regcache, regno); |
dd7be90a KB |
352 | } |
353 | ||
354 | /* Read general purpose floating point registers. */ | |
383f0f5b JB |
355 | if (tdep->ppc_fp0_regnum >= 0) |
356 | for (regno = 0; regno < ppc_num_fprs; regno++) | |
56be3814 | 357 | fetch_register (regcache, tdep->ppc_fp0_regnum + regno); |
7a78ae4e | 358 | |
dd7be90a | 359 | /* Read special registers. */ |
8b164abb | 360 | fetch_register (regcache, gdbarch_pc_regnum (gdbarch)); |
56be3814 UW |
361 | fetch_register (regcache, tdep->ppc_ps_regnum); |
362 | fetch_register (regcache, tdep->ppc_cr_regnum); | |
363 | fetch_register (regcache, tdep->ppc_lr_regnum); | |
364 | fetch_register (regcache, tdep->ppc_ctr_regnum); | |
365 | fetch_register (regcache, tdep->ppc_xer_regnum); | |
383f0f5b | 366 | if (tdep->ppc_fpscr_regnum >= 0) |
56be3814 | 367 | fetch_register (regcache, tdep->ppc_fpscr_regnum); |
dd7be90a | 368 | if (tdep->ppc_mq_regnum >= 0) |
56be3814 | 369 | fetch_register (regcache, tdep->ppc_mq_regnum); |
c906108c | 370 | } |
7a78ae4e | 371 | } |
c906108c | 372 | |
7a78ae4e ND |
373 | /* Store our register values back into the inferior. |
374 | If REGNO is -1, do this for all registers. | |
375 | Otherwise, REGNO specifies which register (so we can save time). */ | |
376 | ||
037a727e | 377 | static void |
56be3814 | 378 | rs6000_store_inferior_registers (struct regcache *regcache, int regno) |
7a78ae4e | 379 | { |
8b164abb | 380 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
7a78ae4e | 381 | if (regno != -1) |
56be3814 | 382 | store_register (regcache, regno); |
7a78ae4e ND |
383 | |
384 | else | |
f6077098 | 385 | { |
8b164abb | 386 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
dd7be90a KB |
387 | |
388 | /* Write general purpose registers first. */ | |
389 | for (regno = tdep->ppc_gp0_regnum; | |
8bf659e8 | 390 | regno < tdep->ppc_gp0_regnum + ppc_num_gprs; |
dd7be90a KB |
391 | regno++) |
392 | { | |
56be3814 | 393 | store_register (regcache, regno); |
dd7be90a | 394 | } |
7a78ae4e | 395 | |
dd7be90a | 396 | /* Write floating point registers. */ |
383f0f5b JB |
397 | if (tdep->ppc_fp0_regnum >= 0) |
398 | for (regno = 0; regno < ppc_num_fprs; regno++) | |
56be3814 | 399 | store_register (regcache, tdep->ppc_fp0_regnum + regno); |
7a78ae4e | 400 | |
dd7be90a | 401 | /* Write special registers. */ |
8b164abb | 402 | store_register (regcache, gdbarch_pc_regnum (gdbarch)); |
56be3814 UW |
403 | store_register (regcache, tdep->ppc_ps_regnum); |
404 | store_register (regcache, tdep->ppc_cr_regnum); | |
405 | store_register (regcache, tdep->ppc_lr_regnum); | |
406 | store_register (regcache, tdep->ppc_ctr_regnum); | |
407 | store_register (regcache, tdep->ppc_xer_regnum); | |
383f0f5b | 408 | if (tdep->ppc_fpscr_regnum >= 0) |
56be3814 | 409 | store_register (regcache, tdep->ppc_fpscr_regnum); |
dd7be90a | 410 | if (tdep->ppc_mq_regnum >= 0) |
56be3814 | 411 | store_register (regcache, tdep->ppc_mq_regnum); |
f6077098 | 412 | } |
7a78ae4e | 413 | } |
f6077098 | 414 | |
7a78ae4e | 415 | |
037a727e UW |
416 | /* Attempt a transfer all LEN bytes starting at OFFSET between the |
417 | inferior's OBJECT:ANNEX space and GDB's READBUF/WRITEBUF buffer. | |
418 | Return the number of bytes actually transferred. */ | |
7a78ae4e | 419 | |
037a727e UW |
420 | static LONGEST |
421 | rs6000_xfer_partial (struct target_ops *ops, enum target_object object, | |
422 | const char *annex, gdb_byte *readbuf, | |
423 | const gdb_byte *writebuf, | |
424 | ULONGEST offset, LONGEST len) | |
7a78ae4e | 425 | { |
037a727e | 426 | pid_t pid = ptid_get_pid (inferior_ptid); |
7a78ae4e | 427 | int arch64 = ARCH64 (); |
7a78ae4e | 428 | |
037a727e | 429 | switch (object) |
c906108c | 430 | { |
037a727e UW |
431 | case TARGET_OBJECT_MEMORY: |
432 | { | |
433 | union | |
7a78ae4e | 434 | { |
037a727e UW |
435 | PTRACE_TYPE_RET word; |
436 | gdb_byte byte[sizeof (PTRACE_TYPE_RET)]; | |
437 | } buffer; | |
438 | ULONGEST rounded_offset; | |
439 | LONGEST partial_len; | |
440 | ||
441 | /* Round the start offset down to the next long word | |
442 | boundary. */ | |
443 | rounded_offset = offset & -(ULONGEST) sizeof (PTRACE_TYPE_RET); | |
444 | ||
445 | /* Since ptrace will transfer a single word starting at that | |
446 | rounded_offset the partial_len needs to be adjusted down to | |
447 | that (remember this function only does a single transfer). | |
448 | Should the required length be even less, adjust it down | |
449 | again. */ | |
450 | partial_len = (rounded_offset + sizeof (PTRACE_TYPE_RET)) - offset; | |
451 | if (partial_len > len) | |
452 | partial_len = len; | |
453 | ||
454 | if (writebuf) | |
455 | { | |
456 | /* If OFFSET:PARTIAL_LEN is smaller than | |
457 | ROUNDED_OFFSET:WORDSIZE then a read/modify write will | |
458 | be needed. Read in the entire word. */ | |
459 | if (rounded_offset < offset | |
460 | || (offset + partial_len | |
461 | < rounded_offset + sizeof (PTRACE_TYPE_RET))) | |
462 | { | |
463 | /* Need part of initial word -- fetch it. */ | |
464 | if (arch64) | |
465 | buffer.word = rs6000_ptrace64 (PT_READ_I, pid, | |
466 | rounded_offset, 0, NULL); | |
467 | else | |
468 | buffer.word = rs6000_ptrace32 (PT_READ_I, pid, | |
469 | (int *)(uintptr_t)rounded_offset, | |
470 | 0, NULL); | |
471 | } | |
472 | ||
473 | /* Copy data to be written over corresponding part of | |
474 | buffer. */ | |
475 | memcpy (buffer.byte + (offset - rounded_offset), | |
476 | writebuf, partial_len); | |
477 | ||
478 | errno = 0; | |
479 | if (arch64) | |
480 | rs6000_ptrace64 (PT_WRITE_D, pid, | |
481 | rounded_offset, buffer.word, NULL); | |
482 | else | |
483 | rs6000_ptrace32 (PT_WRITE_D, pid, | |
484 | (int *)(uintptr_t)rounded_offset, buffer.word, NULL); | |
485 | if (errno) | |
486 | return 0; | |
487 | } | |
488 | ||
489 | if (readbuf) | |
490 | { | |
491 | errno = 0; | |
492 | if (arch64) | |
493 | buffer.word = rs6000_ptrace64 (PT_READ_I, pid, | |
494 | rounded_offset, 0, NULL); | |
495 | else | |
496 | buffer.word = rs6000_ptrace32 (PT_READ_I, pid, | |
497 | (int *)(uintptr_t)rounded_offset, | |
498 | 0, NULL); | |
499 | if (errno) | |
500 | return 0; | |
501 | ||
502 | /* Copy appropriate bytes out of the buffer. */ | |
503 | memcpy (readbuf, buffer.byte + (offset - rounded_offset), | |
504 | partial_len); | |
505 | } | |
506 | ||
507 | return partial_len; | |
508 | } | |
509 | ||
510 | default: | |
511 | return -1; | |
7a78ae4e | 512 | } |
c906108c SS |
513 | } |
514 | ||
482f7fee UW |
515 | /* Wait for the child specified by PTID to do something. Return the |
516 | process ID of the child, or MINUS_ONE_PTID in case of error; store | |
517 | the status in *OURSTATUS. */ | |
518 | ||
519 | static ptid_t | |
520 | rs6000_wait (ptid_t ptid, struct target_waitstatus *ourstatus) | |
521 | { | |
522 | pid_t pid; | |
523 | int status, save_errno; | |
524 | ||
525 | do | |
526 | { | |
527 | set_sigint_trap (); | |
528 | set_sigio_trap (); | |
529 | ||
530 | do | |
531 | { | |
532 | pid = waitpid (ptid_get_pid (ptid), &status, 0); | |
533 | save_errno = errno; | |
534 | } | |
535 | while (pid == -1 && errno == EINTR); | |
536 | ||
537 | clear_sigio_trap (); | |
538 | clear_sigint_trap (); | |
539 | ||
540 | if (pid == -1) | |
541 | { | |
542 | fprintf_unfiltered (gdb_stderr, | |
543 | _("Child process unexpectedly missing: %s.\n"), | |
544 | safe_strerror (save_errno)); | |
545 | ||
546 | /* Claim it exited with unknown signal. */ | |
547 | ourstatus->kind = TARGET_WAITKIND_SIGNALLED; | |
548 | ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN; | |
549 | return minus_one_ptid; | |
550 | } | |
551 | ||
552 | /* Ignore terminated detached child processes. */ | |
553 | if (!WIFSTOPPED (status) && pid != ptid_get_pid (inferior_ptid)) | |
554 | pid = -1; | |
555 | } | |
556 | while (pid == -1); | |
557 | ||
558 | /* AIX has a couple of strange returns from wait(). */ | |
559 | ||
560 | /* stop after load" status. */ | |
561 | if (status == 0x57c) | |
562 | ourstatus->kind = TARGET_WAITKIND_LOADED; | |
563 | /* signal 0. I have no idea why wait(2) returns with this status word. */ | |
564 | else if (status == 0x7f) | |
565 | ourstatus->kind = TARGET_WAITKIND_SPURIOUS; | |
566 | /* A normal waitstatus. Let the usual macros deal with it. */ | |
567 | else | |
568 | store_waitstatus (ourstatus, status); | |
569 | ||
570 | return pid_to_ptid (pid); | |
571 | } | |
037a727e | 572 | |
c906108c SS |
573 | /* Execute one dummy breakpoint instruction. This way we give the kernel |
574 | a chance to do some housekeeping and update inferior's internal data, | |
575 | including u_area. */ | |
576 | ||
577 | static void | |
206988c4 | 578 | exec_one_dummy_insn (struct gdbarch *gdbarch) |
c906108c | 579 | { |
4a7622d1 | 580 | #define DUMMY_INSN_ADDR AIX_TEXT_SEGMENT_BASE+0x200 |
c906108c | 581 | |
7a78ae4e | 582 | int ret, status, pid; |
c906108c | 583 | CORE_ADDR prev_pc; |
8181d85f | 584 | void *bp; |
c906108c SS |
585 | |
586 | /* We plant one dummy breakpoint into DUMMY_INSN_ADDR address. We | |
587 | assume that this address will never be executed again by the real | |
588 | code. */ | |
589 | ||
8181d85f | 590 | bp = deprecated_insert_raw_breakpoint (DUMMY_INSN_ADDR); |
c906108c | 591 | |
c906108c SS |
592 | /* You might think this could be done with a single ptrace call, and |
593 | you'd be correct for just about every platform I've ever worked | |
594 | on. However, rs6000-ibm-aix4.1.3 seems to have screwed this up -- | |
595 | the inferior never hits the breakpoint (it's also worth noting | |
596 | powerpc-ibm-aix4.1.3 works correctly). */ | |
597 | prev_pc = read_pc (); | |
598 | write_pc (DUMMY_INSN_ADDR); | |
7a78ae4e | 599 | if (ARCH64 ()) |
8b5790f2 | 600 | ret = rs6000_ptrace64 (PT_CONTINUE, PIDGET (inferior_ptid), 1, 0, NULL); |
7a78ae4e | 601 | else |
8b5790f2 | 602 | ret = rs6000_ptrace32 (PT_CONTINUE, PIDGET (inferior_ptid), (int *)1, 0, NULL); |
c906108c | 603 | |
7a78ae4e | 604 | if (ret != 0) |
c906108c SS |
605 | perror ("pt_continue"); |
606 | ||
c5aa993b JM |
607 | do |
608 | { | |
609 | pid = wait (&status); | |
610 | } | |
39f77062 | 611 | while (pid != PIDGET (inferior_ptid)); |
c5aa993b | 612 | |
c906108c | 613 | write_pc (prev_pc); |
8181d85f | 614 | deprecated_remove_raw_breakpoint (bp); |
c906108c | 615 | } |
c906108c | 616 | \f |
7a78ae4e ND |
617 | |
618 | /* Copy information about text and data sections from LDI to VP for a 64-bit | |
619 | process if ARCH64 and for a 32-bit process otherwise. */ | |
620 | ||
621 | static void | |
622 | vmap_secs (struct vmap *vp, LdInfo *ldi, int arch64) | |
623 | { | |
624 | if (arch64) | |
625 | { | |
626 | vp->tstart = (CORE_ADDR) ldi->l64.ldinfo_textorg; | |
627 | vp->tend = vp->tstart + ldi->l64.ldinfo_textsize; | |
628 | vp->dstart = (CORE_ADDR) ldi->l64.ldinfo_dataorg; | |
629 | vp->dend = vp->dstart + ldi->l64.ldinfo_datasize; | |
630 | } | |
631 | else | |
632 | { | |
633 | vp->tstart = (unsigned long) ldi->l32.ldinfo_textorg; | |
634 | vp->tend = vp->tstart + ldi->l32.ldinfo_textsize; | |
635 | vp->dstart = (unsigned long) ldi->l32.ldinfo_dataorg; | |
636 | vp->dend = vp->dstart + ldi->l32.ldinfo_datasize; | |
637 | } | |
638 | ||
639 | /* The run time loader maps the file header in addition to the text | |
640 | section and returns a pointer to the header in ldinfo_textorg. | |
641 | Adjust the text start address to point to the real start address | |
642 | of the text section. */ | |
643 | vp->tstart += vp->toffs; | |
644 | } | |
645 | ||
c906108c SS |
646 | /* handle symbol translation on vmapping */ |
647 | ||
648 | static void | |
7a78ae4e | 649 | vmap_symtab (struct vmap *vp) |
c906108c | 650 | { |
52f0bd74 | 651 | struct objfile *objfile; |
c906108c SS |
652 | struct section_offsets *new_offsets; |
653 | int i; | |
c5aa993b | 654 | |
c906108c SS |
655 | objfile = vp->objfile; |
656 | if (objfile == NULL) | |
657 | { | |
658 | /* OK, it's not an objfile we opened ourselves. | |
c5aa993b JM |
659 | Currently, that can only happen with the exec file, so |
660 | relocate the symbols for the symfile. */ | |
c906108c SS |
661 | if (symfile_objfile == NULL) |
662 | return; | |
663 | objfile = symfile_objfile; | |
664 | } | |
63f58cc5 PS |
665 | else if (!vp->loaded) |
666 | /* If symbols are not yet loaded, offsets are not yet valid. */ | |
667 | return; | |
c906108c | 668 | |
9f83329d JB |
669 | new_offsets = |
670 | (struct section_offsets *) | |
671 | alloca (SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); | |
c906108c SS |
672 | |
673 | for (i = 0; i < objfile->num_sections; ++i) | |
f0a58b0b | 674 | new_offsets->offsets[i] = ANOFFSET (objfile->section_offsets, i); |
c5aa993b | 675 | |
c906108c SS |
676 | /* The symbols in the object file are linked to the VMA of the section, |
677 | relocate them VMA relative. */ | |
f0a58b0b EZ |
678 | new_offsets->offsets[SECT_OFF_TEXT (objfile)] = vp->tstart - vp->tvma; |
679 | new_offsets->offsets[SECT_OFF_DATA (objfile)] = vp->dstart - vp->dvma; | |
680 | new_offsets->offsets[SECT_OFF_BSS (objfile)] = vp->dstart - vp->dvma; | |
c906108c SS |
681 | |
682 | objfile_relocate (objfile, new_offsets); | |
683 | } | |
684 | \f | |
685 | /* Add symbols for an objfile. */ | |
686 | ||
687 | static int | |
7a78ae4e | 688 | objfile_symbol_add (void *arg) |
c906108c SS |
689 | { |
690 | struct objfile *obj = (struct objfile *) arg; | |
691 | ||
7e8580c1 | 692 | syms_from_objfile (obj, NULL, 0, 0, 0, 0); |
c906108c SS |
693 | new_symfile_objfile (obj, 0, 0); |
694 | return 1; | |
695 | } | |
696 | ||
63f58cc5 PS |
697 | /* Add symbols for a vmap. Return zero upon error. */ |
698 | ||
699 | int | |
700 | vmap_add_symbols (struct vmap *vp) | |
701 | { | |
702 | if (catch_errors (objfile_symbol_add, vp->objfile, | |
703 | "Error while reading shared library symbols:\n", | |
704 | RETURN_MASK_ALL)) | |
705 | { | |
706 | /* Note this is only done if symbol reading was successful. */ | |
707 | vp->loaded = 1; | |
708 | vmap_symtab (vp); | |
709 | return 1; | |
710 | } | |
711 | return 0; | |
712 | } | |
713 | ||
c906108c SS |
714 | /* Add a new vmap entry based on ldinfo() information. |
715 | ||
716 | If ldi->ldinfo_fd is not valid (e.g. this struct ld_info is from a | |
717 | core file), the caller should set it to -1, and we will open the file. | |
718 | ||
719 | Return the vmap new entry. */ | |
720 | ||
721 | static struct vmap * | |
7a78ae4e | 722 | add_vmap (LdInfo *ldi) |
c906108c SS |
723 | { |
724 | bfd *abfd, *last; | |
52f0bd74 | 725 | char *mem, *objname, *filename; |
c906108c SS |
726 | struct objfile *obj; |
727 | struct vmap *vp; | |
7a78ae4e ND |
728 | int fd; |
729 | ARCH64_DECL (arch64); | |
c906108c SS |
730 | |
731 | /* This ldi structure was allocated using alloca() in | |
732 | xcoff_relocate_symtab(). Now we need to have persistent object | |
733 | and member names, so we should save them. */ | |
734 | ||
7a78ae4e ND |
735 | filename = LDI_FILENAME (ldi, arch64); |
736 | mem = filename + strlen (filename) + 1; | |
c906108c | 737 | mem = savestring (mem, strlen (mem)); |
7a78ae4e | 738 | objname = savestring (filename, strlen (filename)); |
c906108c | 739 | |
7a78ae4e ND |
740 | fd = LDI_FD (ldi, arch64); |
741 | if (fd < 0) | |
c906108c SS |
742 | /* Note that this opens it once for every member; a possible |
743 | enhancement would be to only open it once for every object. */ | |
744 | abfd = bfd_openr (objname, gnutarget); | |
745 | else | |
7a78ae4e | 746 | abfd = bfd_fdopenr (objname, gnutarget, fd); |
c906108c | 747 | if (!abfd) |
63f58cc5 | 748 | { |
8a3fe4f8 | 749 | warning (_("Could not open `%s' as an executable file: %s"), |
63f58cc5 PS |
750 | objname, bfd_errmsg (bfd_get_error ())); |
751 | return NULL; | |
752 | } | |
c906108c SS |
753 | |
754 | /* make sure we have an object file */ | |
755 | ||
756 | if (bfd_check_format (abfd, bfd_object)) | |
757 | vp = map_vmap (abfd, 0); | |
758 | ||
759 | else if (bfd_check_format (abfd, bfd_archive)) | |
760 | { | |
761 | last = 0; | |
762 | /* FIXME??? am I tossing BFDs? bfd? */ | |
763 | while ((last = bfd_openr_next_archived_file (abfd, last))) | |
7ecb6532 | 764 | if (strcmp (mem, last->filename) == 0) |
c906108c SS |
765 | break; |
766 | ||
767 | if (!last) | |
768 | { | |
8a3fe4f8 | 769 | warning (_("\"%s\": member \"%s\" missing."), objname, mem); |
c906108c | 770 | bfd_close (abfd); |
63f58cc5 | 771 | return NULL; |
c906108c SS |
772 | } |
773 | ||
c5aa993b | 774 | if (!bfd_check_format (last, bfd_object)) |
c906108c | 775 | { |
8a3fe4f8 | 776 | warning (_("\"%s\": member \"%s\" not in executable format: %s."), |
63f58cc5 PS |
777 | objname, mem, bfd_errmsg (bfd_get_error ())); |
778 | bfd_close (last); | |
779 | bfd_close (abfd); | |
780 | return NULL; | |
c906108c SS |
781 | } |
782 | ||
783 | vp = map_vmap (last, abfd); | |
784 | } | |
785 | else | |
786 | { | |
8a3fe4f8 | 787 | warning (_("\"%s\": not in executable format: %s."), |
63f58cc5 | 788 | objname, bfd_errmsg (bfd_get_error ())); |
c906108c | 789 | bfd_close (abfd); |
63f58cc5 | 790 | return NULL; |
c906108c | 791 | } |
2df3850c | 792 | obj = allocate_objfile (vp->bfd, 0); |
c906108c SS |
793 | vp->objfile = obj; |
794 | ||
63f58cc5 PS |
795 | /* Always add symbols for the main objfile. */ |
796 | if (vp == vmap || auto_solib_add) | |
797 | vmap_add_symbols (vp); | |
c906108c SS |
798 | return vp; |
799 | } | |
800 | \f | |
801 | /* update VMAP info with ldinfo() information | |
802 | Input is ptr to ldinfo() results. */ | |
803 | ||
804 | static void | |
7a78ae4e | 805 | vmap_ldinfo (LdInfo *ldi) |
c906108c SS |
806 | { |
807 | struct stat ii, vi; | |
52f0bd74 | 808 | struct vmap *vp; |
c906108c SS |
809 | int got_one, retried; |
810 | int got_exec_file = 0; | |
7a78ae4e ND |
811 | uint next; |
812 | int arch64 = ARCH64 (); | |
c906108c SS |
813 | |
814 | /* For each *ldi, see if we have a corresponding *vp. | |
815 | If so, update the mapping, and symbol table. | |
816 | If not, add an entry and symbol table. */ | |
817 | ||
c5aa993b JM |
818 | do |
819 | { | |
7a78ae4e | 820 | char *name = LDI_FILENAME (ldi, arch64); |
c5aa993b | 821 | char *memb = name + strlen (name) + 1; |
7a78ae4e | 822 | int fd = LDI_FD (ldi, arch64); |
c5aa993b JM |
823 | |
824 | retried = 0; | |
825 | ||
7a78ae4e | 826 | if (fstat (fd, &ii) < 0) |
c5aa993b JM |
827 | { |
828 | /* The kernel sets ld_info to -1, if the process is still using the | |
829 | object, and the object is removed. Keep the symbol info for the | |
830 | removed object and issue a warning. */ | |
8a3fe4f8 | 831 | warning (_("%s (fd=%d) has disappeared, keeping its symbols"), |
7a78ae4e | 832 | name, fd); |
c906108c | 833 | continue; |
c5aa993b JM |
834 | } |
835 | retry: | |
836 | for (got_one = 0, vp = vmap; vp; vp = vp->nxt) | |
837 | { | |
838 | struct objfile *objfile; | |
c906108c | 839 | |
c5aa993b JM |
840 | /* First try to find a `vp', which is the same as in ldinfo. |
841 | If not the same, just continue and grep the next `vp'. If same, | |
842 | relocate its tstart, tend, dstart, dend values. If no such `vp' | |
843 | found, get out of this for loop, add this ldi entry as a new vmap | |
844 | (add_vmap) and come back, find its `vp' and so on... */ | |
845 | ||
846 | /* The filenames are not always sufficient to match on. */ | |
847 | ||
7ecb6532 MD |
848 | if ((name[0] == '/' && strcmp (name, vp->name) != 0) |
849 | || (memb[0] && strcmp (memb, vp->member) != 0)) | |
c906108c | 850 | continue; |
c906108c | 851 | |
c5aa993b JM |
852 | /* See if we are referring to the same file. |
853 | We have to check objfile->obfd, symfile.c:reread_symbols might | |
854 | have updated the obfd after a change. */ | |
855 | objfile = vp->objfile == NULL ? symfile_objfile : vp->objfile; | |
856 | if (objfile == NULL | |
857 | || objfile->obfd == NULL | |
858 | || bfd_stat (objfile->obfd, &vi) < 0) | |
859 | { | |
8a3fe4f8 | 860 | warning (_("Unable to stat %s, keeping its symbols"), name); |
c5aa993b JM |
861 | continue; |
862 | } | |
c906108c | 863 | |
c5aa993b JM |
864 | if (ii.st_dev != vi.st_dev || ii.st_ino != vi.st_ino) |
865 | continue; | |
c906108c | 866 | |
c5aa993b | 867 | if (!retried) |
7a78ae4e | 868 | close (fd); |
c906108c | 869 | |
c5aa993b | 870 | ++got_one; |
c906108c | 871 | |
c5aa993b | 872 | /* Found a corresponding VMAP. Remap! */ |
c906108c | 873 | |
7a78ae4e | 874 | vmap_secs (vp, ldi, arch64); |
c906108c | 875 | |
c5aa993b JM |
876 | /* The objfile is only NULL for the exec file. */ |
877 | if (vp->objfile == NULL) | |
878 | got_exec_file = 1; | |
c906108c | 879 | |
c5aa993b JM |
880 | /* relocate symbol table(s). */ |
881 | vmap_symtab (vp); | |
c906108c | 882 | |
e42dc924 | 883 | /* Announce new object files. Doing this after symbol relocation |
2ec664f5 | 884 | makes aix-thread.c's job easier. */ |
06d3b283 UW |
885 | if (vp->objfile) |
886 | observer_notify_new_objfile (vp->objfile); | |
e42dc924 | 887 | |
c5aa993b JM |
888 | /* There may be more, so we don't break out of the loop. */ |
889 | } | |
890 | ||
891 | /* if there was no matching *vp, we must perforce create the sucker(s) */ | |
892 | if (!got_one && !retried) | |
893 | { | |
894 | add_vmap (ldi); | |
895 | ++retried; | |
896 | goto retry; | |
897 | } | |
898 | } | |
7a78ae4e ND |
899 | while ((next = LDI_NEXT (ldi, arch64)) |
900 | && (ldi = (void *) (next + (char *) ldi))); | |
c906108c SS |
901 | |
902 | /* If we don't find the symfile_objfile anywhere in the ldinfo, it | |
903 | is unlikely that the symbol file is relocated to the proper | |
904 | address. And we might have attached to a process which is | |
905 | running a different copy of the same executable. */ | |
906 | if (symfile_objfile != NULL && !got_exec_file) | |
907 | { | |
8a3fe4f8 | 908 | warning (_("Symbol file %s\nis not mapped; discarding it.\n\ |
c906108c SS |
909 | If in fact that file has symbols which the mapped files listed by\n\ |
910 | \"info files\" lack, you can load symbols with the \"symbol-file\" or\n\ | |
911 | \"add-symbol-file\" commands (note that you must take care of relocating\n\ | |
8a3fe4f8 | 912 | symbols to the proper address)."), |
f5a96129 | 913 | symfile_objfile->name); |
c906108c SS |
914 | free_objfile (symfile_objfile); |
915 | symfile_objfile = NULL; | |
916 | } | |
917 | breakpoint_re_set (); | |
918 | } | |
919 | \f | |
920 | /* As well as symbol tables, exec_sections need relocation. After | |
921 | the inferior process' termination, there will be a relocated symbol | |
922 | table exist with no corresponding inferior process. At that time, we | |
923 | need to use `exec' bfd, rather than the inferior process's memory space | |
924 | to look up symbols. | |
925 | ||
926 | `exec_sections' need to be relocated only once, as long as the exec | |
927 | file remains unchanged. | |
c5aa993b | 928 | */ |
c906108c SS |
929 | |
930 | static void | |
7a78ae4e | 931 | vmap_exec (void) |
c906108c SS |
932 | { |
933 | static bfd *execbfd; | |
934 | int i; | |
935 | ||
936 | if (execbfd == exec_bfd) | |
937 | return; | |
938 | ||
939 | execbfd = exec_bfd; | |
940 | ||
941 | if (!vmap || !exec_ops.to_sections) | |
8a3fe4f8 | 942 | error (_("vmap_exec: vmap or exec_ops.to_sections == 0.")); |
c906108c | 943 | |
c5aa993b | 944 | for (i = 0; &exec_ops.to_sections[i] < exec_ops.to_sections_end; i++) |
c906108c | 945 | { |
7ecb6532 | 946 | if (strcmp (".text", exec_ops.to_sections[i].the_bfd_section->name) == 0) |
c906108c SS |
947 | { |
948 | exec_ops.to_sections[i].addr += vmap->tstart - vmap->tvma; | |
949 | exec_ops.to_sections[i].endaddr += vmap->tstart - vmap->tvma; | |
950 | } | |
7ecb6532 MD |
951 | else if (strcmp (".data", |
952 | exec_ops.to_sections[i].the_bfd_section->name) == 0) | |
c906108c SS |
953 | { |
954 | exec_ops.to_sections[i].addr += vmap->dstart - vmap->dvma; | |
955 | exec_ops.to_sections[i].endaddr += vmap->dstart - vmap->dvma; | |
956 | } | |
7ecb6532 MD |
957 | else if (strcmp (".bss", |
958 | exec_ops.to_sections[i].the_bfd_section->name) == 0) | |
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 | ||
136d6dae VP |
969 | static void (*super_create_inferior) (struct target_ops *,char *exec_file, |
970 | char *allargs, char **env, int from_tty); | |
1f480a5e | 971 | static void |
136d6dae VP |
972 | rs6000_create_inferior (struct target_ops * ops, char *exec_file, |
973 | char *allargs, char **env, int from_tty) | |
7a78ae4e ND |
974 | { |
975 | enum bfd_architecture arch; | |
976 | unsigned long mach; | |
977 | bfd abfd; | |
978 | struct gdbarch_info info; | |
979 | ||
136d6dae | 980 | super_create_inferior (ops, exec_file, allargs, env, from_tty); |
1f480a5e | 981 | |
7a78ae4e ND |
982 | if (__power_rs ()) |
983 | { | |
984 | arch = bfd_arch_rs6000; | |
985 | mach = bfd_mach_rs6k; | |
986 | } | |
987 | else | |
988 | { | |
989 | arch = bfd_arch_powerpc; | |
990 | mach = bfd_mach_ppc; | |
991 | } | |
19caaa45 PS |
992 | |
993 | /* FIXME: schauer/2002-02-25: | |
994 | We don't know if we are executing a 32 or 64 bit executable, | |
995 | and have no way to pass the proper word size to rs6000_gdbarch_init. | |
996 | So we have to avoid switching to a new architecture, if the architecture | |
997 | matches already. | |
998 | Blindly calling rs6000_gdbarch_init used to work in older versions of | |
999 | GDB, as rs6000_gdbarch_init incorrectly used the previous tdep to | |
1000 | determine the wordsize. */ | |
1001 | if (exec_bfd) | |
1002 | { | |
1003 | const struct bfd_arch_info *exec_bfd_arch_info; | |
1004 | ||
1005 | exec_bfd_arch_info = bfd_get_arch_info (exec_bfd); | |
1006 | if (arch == exec_bfd_arch_info->arch) | |
1007 | return; | |
1008 | } | |
1009 | ||
7a78ae4e ND |
1010 | bfd_default_set_arch_mach (&abfd, arch, mach); |
1011 | ||
fb6ecb0f | 1012 | gdbarch_info_init (&info); |
7a78ae4e | 1013 | info.bfd_arch_info = bfd_get_arch_info (&abfd); |
7aea86e6 | 1014 | info.abfd = exec_bfd; |
7a78ae4e | 1015 | |
16f33e29 | 1016 | if (!gdbarch_update_p (info)) |
e2e0b3e5 | 1017 | internal_error (__FILE__, __LINE__, |
6f7f3f0d | 1018 | _("rs6000_create_inferior: failed to select architecture")); |
7a78ae4e ND |
1019 | } |
1020 | ||
c906108c | 1021 | \f |
c5aa993b | 1022 | /* xcoff_relocate_symtab - hook for symbol table relocation. |
8d08c9ce JB |
1023 | |
1024 | This is only applicable to live processes, and is a no-op when | |
1025 | debugging a core file. */ | |
c906108c SS |
1026 | |
1027 | void | |
7a78ae4e | 1028 | xcoff_relocate_symtab (unsigned int pid) |
c906108c | 1029 | { |
c18e0d23 | 1030 | int load_segs = 64; /* number of load segments */ |
380b774b | 1031 | int rc; |
7a78ae4e ND |
1032 | LdInfo *ldi = NULL; |
1033 | int arch64 = ARCH64 (); | |
1034 | int ldisize = arch64 ? sizeof (ldi->l64) : sizeof (ldi->l32); | |
1035 | int size; | |
c906108c | 1036 | |
8d08c9ce JB |
1037 | if (ptid_equal (inferior_ptid, null_ptid)) |
1038 | return; | |
1039 | ||
c18e0d23 GM |
1040 | do |
1041 | { | |
7a78ae4e | 1042 | size = load_segs * ldisize; |
3a84337c | 1043 | ldi = (void *) xrealloc (ldi, size); |
c906108c | 1044 | |
7a78ae4e | 1045 | #if 0 |
380b774b GM |
1046 | /* According to my humble theory, AIX has some timing problems and |
1047 | when the user stack grows, kernel doesn't update stack info in time | |
1048 | and ptrace calls step on user stack. That is why we sleep here a | |
1049 | little, and give kernel to update its internals. */ | |
380b774b | 1050 | usleep (36000); |
7a78ae4e ND |
1051 | #endif |
1052 | ||
1053 | if (arch64) | |
8b5790f2 | 1054 | rc = rs6000_ptrace64 (PT_LDINFO, pid, (unsigned long) ldi, size, NULL); |
7a78ae4e | 1055 | else |
8b5790f2 | 1056 | rc = rs6000_ptrace32 (PT_LDINFO, pid, (int *) ldi, size, NULL); |
c906108c | 1057 | |
c18e0d23 GM |
1058 | if (rc == -1) |
1059 | { | |
380b774b GM |
1060 | if (errno == ENOMEM) |
1061 | load_segs *= 2; | |
1062 | else | |
e2e0b3e5 | 1063 | perror_with_name (_("ptrace ldinfo")); |
c18e0d23 GM |
1064 | } |
1065 | else | |
1066 | { | |
380b774b GM |
1067 | vmap_ldinfo (ldi); |
1068 | vmap_exec (); /* relocate the exec and core sections as well. */ | |
c18e0d23 GM |
1069 | } |
1070 | } while (rc == -1); | |
380b774b | 1071 | if (ldi) |
b8c9b27d | 1072 | xfree (ldi); |
c906108c SS |
1073 | } |
1074 | \f | |
1075 | /* Core file stuff. */ | |
1076 | ||
1077 | /* Relocate symtabs and read in shared library info, based on symbols | |
1078 | from the core file. */ | |
1079 | ||
1080 | void | |
7a78ae4e | 1081 | xcoff_relocate_core (struct target_ops *target) |
c906108c | 1082 | { |
7be0c536 | 1083 | struct bfd_section *ldinfo_sec; |
c906108c | 1084 | int offset = 0; |
7a78ae4e | 1085 | LdInfo *ldi; |
c906108c | 1086 | struct vmap *vp; |
7a78ae4e ND |
1087 | int arch64 = ARCH64 (); |
1088 | ||
1089 | /* Size of a struct ld_info except for the variable-length filename. */ | |
1090 | int nonfilesz = (int)LDI_FILENAME ((LdInfo *)0, arch64); | |
c906108c SS |
1091 | |
1092 | /* Allocated size of buffer. */ | |
7a78ae4e | 1093 | int buffer_size = nonfilesz; |
c906108c SS |
1094 | char *buffer = xmalloc (buffer_size); |
1095 | struct cleanup *old = make_cleanup (free_current_contents, &buffer); | |
c5aa993b | 1096 | |
c906108c SS |
1097 | ldinfo_sec = bfd_get_section_by_name (core_bfd, ".ldinfo"); |
1098 | if (ldinfo_sec == NULL) | |
1099 | { | |
1100 | bfd_err: | |
1101 | fprintf_filtered (gdb_stderr, "Couldn't get ldinfo from core file: %s\n", | |
1102 | bfd_errmsg (bfd_get_error ())); | |
1103 | do_cleanups (old); | |
1104 | return; | |
1105 | } | |
1106 | do | |
1107 | { | |
1108 | int i; | |
1109 | int names_found = 0; | |
1110 | ||
1111 | /* Read in everything but the name. */ | |
1112 | if (bfd_get_section_contents (core_bfd, ldinfo_sec, buffer, | |
7a78ae4e | 1113 | offset, nonfilesz) == 0) |
c906108c SS |
1114 | goto bfd_err; |
1115 | ||
1116 | /* Now the name. */ | |
7a78ae4e | 1117 | i = nonfilesz; |
c906108c SS |
1118 | do |
1119 | { | |
1120 | if (i == buffer_size) | |
1121 | { | |
1122 | buffer_size *= 2; | |
1123 | buffer = xrealloc (buffer, buffer_size); | |
1124 | } | |
1125 | if (bfd_get_section_contents (core_bfd, ldinfo_sec, &buffer[i], | |
1126 | offset + i, 1) == 0) | |
1127 | goto bfd_err; | |
1128 | if (buffer[i++] == '\0') | |
1129 | ++names_found; | |
c5aa993b JM |
1130 | } |
1131 | while (names_found < 2); | |
c906108c | 1132 | |
7a78ae4e | 1133 | ldi = (LdInfo *) buffer; |
c906108c SS |
1134 | |
1135 | /* Can't use a file descriptor from the core file; need to open it. */ | |
7a78ae4e ND |
1136 | if (arch64) |
1137 | ldi->l64.ldinfo_fd = -1; | |
1138 | else | |
1139 | ldi->l32.ldinfo_fd = -1; | |
c5aa993b | 1140 | |
c906108c | 1141 | /* The first ldinfo is for the exec file, allocated elsewhere. */ |
63f58cc5 | 1142 | if (offset == 0 && vmap != NULL) |
c906108c SS |
1143 | vp = vmap; |
1144 | else | |
7a78ae4e | 1145 | vp = add_vmap (ldi); |
c906108c | 1146 | |
63f58cc5 | 1147 | /* Process next shared library upon error. */ |
7a78ae4e | 1148 | offset += LDI_NEXT (ldi, arch64); |
63f58cc5 PS |
1149 | if (vp == NULL) |
1150 | continue; | |
1151 | ||
7a78ae4e | 1152 | vmap_secs (vp, ldi, arch64); |
c906108c SS |
1153 | |
1154 | /* Unless this is the exec file, | |
c5aa993b | 1155 | add our sections to the section table for the core target. */ |
c906108c SS |
1156 | if (vp != vmap) |
1157 | { | |
c906108c | 1158 | struct section_table *stp; |
6426a772 JM |
1159 | |
1160 | target_resize_to_sections (target, 2); | |
c906108c SS |
1161 | stp = target->to_sections_end - 2; |
1162 | ||
1163 | stp->bfd = vp->bfd; | |
1164 | stp->the_bfd_section = bfd_get_section_by_name (stp->bfd, ".text"); | |
1165 | stp->addr = vp->tstart; | |
1166 | stp->endaddr = vp->tend; | |
1167 | stp++; | |
c5aa993b | 1168 | |
c906108c SS |
1169 | stp->bfd = vp->bfd; |
1170 | stp->the_bfd_section = bfd_get_section_by_name (stp->bfd, ".data"); | |
1171 | stp->addr = vp->dstart; | |
1172 | stp->endaddr = vp->dend; | |
1173 | } | |
1174 | ||
1175 | vmap_symtab (vp); | |
e42dc924 | 1176 | |
06d3b283 UW |
1177 | if (vp != vmap && vp->objfile) |
1178 | observer_notify_new_objfile (vp->objfile); | |
c5aa993b | 1179 | } |
7a78ae4e | 1180 | while (LDI_NEXT (ldi, arch64) != 0); |
c906108c SS |
1181 | vmap_exec (); |
1182 | breakpoint_re_set (); | |
1183 | do_cleanups (old); | |
1184 | } | |
c906108c SS |
1185 | \f |
1186 | /* Under AIX, we have to pass the correct TOC pointer to a function | |
1187 | when calling functions in the inferior. | |
1188 | We try to find the relative toc offset of the objfile containing PC | |
1189 | and add the current load address of the data segment from the vmap. */ | |
1190 | ||
1191 | static CORE_ADDR | |
7a78ae4e | 1192 | find_toc_address (CORE_ADDR pc) |
c906108c SS |
1193 | { |
1194 | struct vmap *vp; | |
7a78ae4e | 1195 | extern CORE_ADDR get_toc_offset (struct objfile *); /* xcoffread.c */ |
c906108c SS |
1196 | |
1197 | for (vp = vmap; vp; vp = vp->nxt) | |
1198 | { | |
1199 | if (pc >= vp->tstart && pc < vp->tend) | |
1200 | { | |
1201 | /* vp->objfile is only NULL for the exec file. */ | |
1202 | return vp->dstart + get_toc_offset (vp->objfile == NULL | |
1203 | ? symfile_objfile | |
1204 | : vp->objfile); | |
1205 | } | |
1206 | } | |
8a3fe4f8 | 1207 | error (_("Unable to find TOC entry for pc %s."), hex_string (pc)); |
c906108c SS |
1208 | } |
1209 | \f | |
c906108c SS |
1210 | |
1211 | void | |
7a61a01c | 1212 | _initialize_rs6000_nat (void) |
c906108c | 1213 | { |
037a727e UW |
1214 | struct target_ops *t; |
1215 | ||
1216 | t = inf_ptrace_target (); | |
1217 | t->to_fetch_registers = rs6000_fetch_inferior_registers; | |
1218 | t->to_store_registers = rs6000_store_inferior_registers; | |
1219 | t->to_xfer_partial = rs6000_xfer_partial; | |
1f480a5e UW |
1220 | |
1221 | super_create_inferior = t->to_create_inferior; | |
1222 | t->to_create_inferior = rs6000_create_inferior; | |
1223 | ||
482f7fee UW |
1224 | t->to_wait = rs6000_wait; |
1225 | ||
037a727e UW |
1226 | add_target (t); |
1227 | ||
2ec664f5 MS |
1228 | /* Initialize hook in rs6000-tdep.c for determining the TOC address |
1229 | when calling functions in the inferior. */ | |
7a78ae4e | 1230 | rs6000_find_toc_address_hook = find_toc_address; |
c906108c | 1231 | } |