Commit | Line | Data |
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c906108c | 1 | /* IBM RS/6000 native-dependent code for GDB, the GNU debugger. |
4646aa9d | 2 | |
28e7fd62 | 3 | Copyright (C) 1986-2013 Free Software Foundation, Inc. |
c906108c | 4 | |
c5aa993b | 5 | This file is part of GDB. |
c906108c | 6 | |
c5aa993b JM |
7 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 10 | (at your option) any later version. |
c906108c | 11 | |
c5aa993b JM |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
c906108c | 16 | |
c5aa993b | 17 | You should have received a copy of the GNU General Public License |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
19 | |
20 | #include "defs.h" | |
21 | #include "inferior.h" | |
22 | #include "target.h" | |
23 | #include "gdbcore.h" | |
c906108c SS |
24 | #include "symfile.h" |
25 | #include "objfiles.h" | |
42203e46 | 26 | #include "libbfd.h" /* For bfd_default_set_arch_mach (FIXME) */ |
c906108c | 27 | #include "bfd.h" |
60250e8b | 28 | #include "exceptions.h" |
c906108c | 29 | #include "gdb-stabs.h" |
4e052eda | 30 | #include "regcache.h" |
19caaa45 | 31 | #include "arch-utils.h" |
dab06dbe | 32 | #include "inf-child.h" |
037a727e | 33 | #include "inf-ptrace.h" |
11bf77db | 34 | #include "ppc-tdep.h" |
6f7f3f0d | 35 | #include "rs6000-tdep.h" |
4646aa9d | 36 | #include "exec.h" |
06d3b283 | 37 | #include "observer.h" |
63807e1d | 38 | #include "xcoffread.h" |
c906108c SS |
39 | |
40 | #include <sys/ptrace.h> | |
41 | #include <sys/reg.h> | |
42 | ||
43 | #include <sys/param.h> | |
44 | #include <sys/dir.h> | |
45 | #include <sys/user.h> | |
46 | #include <signal.h> | |
47 | #include <sys/ioctl.h> | |
48 | #include <fcntl.h> | |
7a78ae4e | 49 | #include <errno.h> |
c906108c SS |
50 | |
51 | #include <a.out.h> | |
52 | #include <sys/file.h> | |
53 | #include "gdb_stat.h" | |
92107356 | 54 | #include "gdb_bfd.h" |
c906108c | 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> |
4d1eb6b4 | 60 | #include "xml-utils.h" |
c906108c | 61 | |
7a78ae4e ND |
62 | /* On AIX4.3+, sys/ldr.h provides different versions of struct ld_info for |
63 | debugging 32-bit and 64-bit processes. Define a typedef and macros for | |
0df8b418 | 64 | accessing fields in the appropriate structures. */ |
7a78ae4e ND |
65 | |
66 | /* In 32-bit compilation mode (which is the only mode from which ptrace() | |
0df8b418 | 67 | works on 4.3), __ld_info32 is #defined as equivalent to ld_info. */ |
7a78ae4e ND |
68 | |
69 | #ifdef __ld_info32 | |
70 | # define ARCH3264 | |
71 | #endif | |
72 | ||
0df8b418 | 73 | /* Return whether the current architecture is 64-bit. */ |
7a78ae4e ND |
74 | |
75 | #ifndef ARCH3264 | |
76 | # define ARCH64() 0 | |
77 | #else | |
f5656ead | 78 | # define ARCH64() (register_size (target_gdbarch (), 0) == 8) |
7a78ae4e ND |
79 | #endif |
80 | ||
0df8b418 | 81 | /* Union of 32-bit and 64-bit versions of ld_info. */ |
7a78ae4e ND |
82 | |
83 | typedef union { | |
84 | #ifndef ARCH3264 | |
85 | struct ld_info l32; | |
86 | struct ld_info l64; | |
87 | #else | |
88 | struct __ld_info32 l32; | |
89 | struct __ld_info64 l64; | |
90 | #endif | |
91 | } LdInfo; | |
92 | ||
93 | /* If compiling with 32-bit and 64-bit debugging capability (e.g. AIX 4.x), | |
94 | declare and initialize a variable named VAR suitable for use as the arch64 | |
0df8b418 | 95 | parameter to the various LDI_*() macros. */ |
7a78ae4e ND |
96 | |
97 | #ifndef ARCH3264 | |
98 | # define ARCH64_DECL(var) | |
99 | #else | |
100 | # define ARCH64_DECL(var) int var = ARCH64 () | |
101 | #endif | |
102 | ||
103 | /* Return LDI's FIELD for a 64-bit process if ARCH64 and for a 32-bit process | |
104 | otherwise. This technique only works for FIELDs with the same data type in | |
0df8b418 | 105 | 32-bit and 64-bit versions of ld_info. */ |
7a78ae4e ND |
106 | |
107 | #ifndef ARCH3264 | |
108 | # define LDI_FIELD(ldi, arch64, field) (ldi)->l32.ldinfo_##field | |
109 | #else | |
110 | # define LDI_FIELD(ldi, arch64, field) \ | |
111 | (arch64 ? (ldi)->l64.ldinfo_##field : (ldi)->l32.ldinfo_##field) | |
112 | #endif | |
113 | ||
114 | /* Return various LDI fields for a 64-bit process if ARCH64 and for a 32-bit | |
0df8b418 | 115 | process otherwise. */ |
7a78ae4e ND |
116 | |
117 | #define LDI_NEXT(ldi, arch64) LDI_FIELD(ldi, arch64, next) | |
118 | #define LDI_FD(ldi, arch64) LDI_FIELD(ldi, arch64, fd) | |
119 | #define LDI_FILENAME(ldi, arch64) LDI_FIELD(ldi, arch64, filename) | |
c906108c | 120 | |
fb14de7b | 121 | static void exec_one_dummy_insn (struct regcache *); |
c906108c | 122 | |
4d1eb6b4 JB |
123 | static LONGEST rs6000_xfer_shared_libraries |
124 | (struct target_ops *ops, enum target_object object, | |
125 | const char *annex, gdb_byte *readbuf, const gdb_byte *writebuf, | |
126 | ULONGEST offset, LONGEST len); | |
127 | ||
dd7be90a KB |
128 | /* Given REGNO, a gdb register number, return the corresponding |
129 | number suitable for use as a ptrace() parameter. Return -1 if | |
130 | there's no suitable mapping. Also, set the int pointed to by | |
131 | ISFLOAT to indicate whether REGNO is a floating point register. */ | |
c906108c | 132 | |
dd7be90a | 133 | static int |
206988c4 | 134 | regmap (struct gdbarch *gdbarch, int regno, int *isfloat) |
c5aa993b | 135 | { |
206988c4 | 136 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
dd7be90a KB |
137 | |
138 | *isfloat = 0; | |
8bf659e8 JB |
139 | if (tdep->ppc_gp0_regnum <= regno |
140 | && regno < tdep->ppc_gp0_regnum + ppc_num_gprs) | |
dd7be90a | 141 | return regno; |
383f0f5b JB |
142 | else if (tdep->ppc_fp0_regnum >= 0 |
143 | && tdep->ppc_fp0_regnum <= regno | |
366f009f | 144 | && regno < tdep->ppc_fp0_regnum + ppc_num_fprs) |
dd7be90a KB |
145 | { |
146 | *isfloat = 1; | |
366f009f | 147 | return regno - tdep->ppc_fp0_regnum + FPR0; |
dd7be90a | 148 | } |
206988c4 | 149 | else if (regno == gdbarch_pc_regnum (gdbarch)) |
dd7be90a KB |
150 | return IAR; |
151 | else if (regno == tdep->ppc_ps_regnum) | |
152 | return MSR; | |
153 | else if (regno == tdep->ppc_cr_regnum) | |
154 | return CR; | |
155 | else if (regno == tdep->ppc_lr_regnum) | |
156 | return LR; | |
157 | else if (regno == tdep->ppc_ctr_regnum) | |
158 | return CTR; | |
159 | else if (regno == tdep->ppc_xer_regnum) | |
160 | return XER; | |
383f0f5b JB |
161 | else if (tdep->ppc_fpscr_regnum >= 0 |
162 | && regno == tdep->ppc_fpscr_regnum) | |
0e061eef | 163 | return FPSCR; |
dd7be90a KB |
164 | else if (tdep->ppc_mq_regnum >= 0 && regno == tdep->ppc_mq_regnum) |
165 | return MQ; | |
166 | else | |
167 | return -1; | |
168 | } | |
c906108c | 169 | |
0df8b418 | 170 | /* Call ptrace(REQ, ID, ADDR, DATA, BUF). */ |
c906108c | 171 | |
7a78ae4e | 172 | static int |
8b5790f2 | 173 | rs6000_ptrace32 (int req, int id, int *addr, int data, int *buf) |
7a78ae4e ND |
174 | { |
175 | int ret = ptrace (req, id, (int *)addr, data, buf); | |
176 | #if 0 | |
8b5790f2 | 177 | printf ("rs6000_ptrace32 (%d, %d, 0x%x, %08x, 0x%x) = 0x%x\n", |
7a78ae4e ND |
178 | req, id, (unsigned int)addr, data, (unsigned int)buf, ret); |
179 | #endif | |
180 | return ret; | |
181 | } | |
c906108c | 182 | |
0df8b418 | 183 | /* Call ptracex(REQ, ID, ADDR, DATA, BUF). */ |
c906108c | 184 | |
7a78ae4e | 185 | static int |
0d16ee5d | 186 | rs6000_ptrace64 (int req, int id, long long addr, int data, void *buf) |
7a78ae4e ND |
187 | { |
188 | #ifdef ARCH3264 | |
189 | int ret = ptracex (req, id, addr, data, buf); | |
190 | #else | |
191 | int ret = 0; | |
192 | #endif | |
193 | #if 0 | |
2244ba2e PM |
194 | printf ("rs6000_ptrace64 (%d, %d, %s, %08x, 0x%x) = 0x%x\n", |
195 | req, id, hex_string (addr), data, (unsigned int)buf, ret); | |
7a78ae4e ND |
196 | #endif |
197 | return ret; | |
198 | } | |
c906108c | 199 | |
0df8b418 | 200 | /* Fetch register REGNO from the inferior. */ |
c906108c | 201 | |
7a78ae4e | 202 | static void |
56be3814 | 203 | fetch_register (struct regcache *regcache, int regno) |
7a78ae4e | 204 | { |
8b164abb | 205 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
d9d9c31f | 206 | int addr[MAX_REGISTER_SIZE]; |
dd7be90a | 207 | int nr, isfloat; |
c906108c | 208 | |
0df8b418 | 209 | /* Retrieved values may be -1, so infer errors from errno. */ |
7a78ae4e | 210 | errno = 0; |
c906108c | 211 | |
206988c4 | 212 | nr = regmap (gdbarch, regno, &isfloat); |
dd7be90a | 213 | |
0df8b418 | 214 | /* Floating-point registers. */ |
dd7be90a KB |
215 | if (isfloat) |
216 | rs6000_ptrace32 (PT_READ_FPR, PIDGET (inferior_ptid), addr, nr, 0); | |
c906108c | 217 | |
0df8b418 | 218 | /* Bogus register number. */ |
dd7be90a | 219 | else if (nr < 0) |
2a18e3d9 | 220 | { |
8b164abb | 221 | if (regno >= gdbarch_num_regs (gdbarch)) |
2a18e3d9 EZ |
222 | fprintf_unfiltered (gdb_stderr, |
223 | "gdb error: register no %d not implemented.\n", | |
224 | regno); | |
dd7be90a | 225 | return; |
2a18e3d9 | 226 | } |
c906108c | 227 | |
0df8b418 | 228 | /* Fixed-point registers. */ |
7a78ae4e ND |
229 | else |
230 | { | |
7a78ae4e | 231 | if (!ARCH64 ()) |
0df8b418 MS |
232 | *addr = rs6000_ptrace32 (PT_READ_GPR, PIDGET (inferior_ptid), |
233 | (int *) nr, 0, 0); | |
7a78ae4e ND |
234 | else |
235 | { | |
236 | /* PT_READ_GPR requires the buffer parameter to point to long long, | |
0df8b418 | 237 | even if the register is really only 32 bits. */ |
7a78ae4e | 238 | long long buf; |
0d16ee5d | 239 | rs6000_ptrace64 (PT_READ_GPR, PIDGET (inferior_ptid), nr, 0, &buf); |
8b164abb | 240 | if (register_size (gdbarch, regno) == 8) |
7a78ae4e ND |
241 | memcpy (addr, &buf, 8); |
242 | else | |
243 | *addr = buf; | |
244 | } | |
245 | } | |
246 | ||
247 | if (!errno) | |
56be3814 | 248 | regcache_raw_supply (regcache, regno, (char *) addr); |
7a78ae4e ND |
249 | else |
250 | { | |
251 | #if 0 | |
0df8b418 | 252 | /* FIXME: this happens 3 times at the start of each 64-bit program. */ |
9b20d036 | 253 | perror (_("ptrace read")); |
7a78ae4e ND |
254 | #endif |
255 | errno = 0; | |
256 | } | |
c906108c SS |
257 | } |
258 | ||
0df8b418 | 259 | /* Store register REGNO back into the inferior. */ |
c906108c | 260 | |
7a78ae4e | 261 | static void |
fb14de7b | 262 | store_register (struct regcache *regcache, int regno) |
c906108c | 263 | { |
8b164abb | 264 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
d9d9c31f | 265 | int addr[MAX_REGISTER_SIZE]; |
dd7be90a | 266 | int nr, isfloat; |
c906108c | 267 | |
11bf77db | 268 | /* Fetch the register's value from the register cache. */ |
56be3814 | 269 | regcache_raw_collect (regcache, regno, addr); |
11bf77db | 270 | |
0df8b418 | 271 | /* -1 can be a successful return value, so infer errors from errno. */ |
c906108c SS |
272 | errno = 0; |
273 | ||
206988c4 | 274 | nr = regmap (gdbarch, regno, &isfloat); |
dd7be90a | 275 | |
0df8b418 | 276 | /* Floating-point registers. */ |
dd7be90a KB |
277 | if (isfloat) |
278 | rs6000_ptrace32 (PT_WRITE_FPR, PIDGET (inferior_ptid), addr, nr, 0); | |
c906108c | 279 | |
0df8b418 | 280 | /* Bogus register number. */ |
dd7be90a | 281 | else if (nr < 0) |
7a78ae4e | 282 | { |
8b164abb | 283 | if (regno >= gdbarch_num_regs (gdbarch)) |
7a78ae4e ND |
284 | fprintf_unfiltered (gdb_stderr, |
285 | "gdb error: register no %d not implemented.\n", | |
286 | regno); | |
287 | } | |
c906108c | 288 | |
0df8b418 | 289 | /* Fixed-point registers. */ |
7a78ae4e ND |
290 | else |
291 | { | |
8b164abb | 292 | if (regno == gdbarch_sp_regnum (gdbarch)) |
7a78ae4e ND |
293 | /* Execute one dummy instruction (which is a breakpoint) in inferior |
294 | process to give kernel a chance to do internal housekeeping. | |
295 | Otherwise the following ptrace(2) calls will mess up user stack | |
296 | since kernel will get confused about the bottom of the stack | |
0df8b418 | 297 | (%sp). */ |
fb14de7b | 298 | exec_one_dummy_insn (regcache); |
c906108c | 299 | |
11bf77db KB |
300 | /* The PT_WRITE_GPR operation is rather odd. For 32-bit inferiors, |
301 | the register's value is passed by value, but for 64-bit inferiors, | |
302 | the address of a buffer containing the value is passed. */ | |
7a78ae4e | 303 | if (!ARCH64 ()) |
0df8b418 MS |
304 | rs6000_ptrace32 (PT_WRITE_GPR, PIDGET (inferior_ptid), |
305 | (int *) nr, *addr, 0); | |
7a78ae4e | 306 | else |
c906108c | 307 | { |
7a78ae4e | 308 | /* PT_WRITE_GPR requires the buffer parameter to point to an 8-byte |
0df8b418 | 309 | area, even if the register is really only 32 bits. */ |
7a78ae4e | 310 | long long buf; |
8b164abb | 311 | if (register_size (gdbarch, regno) == 8) |
7a78ae4e ND |
312 | memcpy (&buf, addr, 8); |
313 | else | |
314 | buf = *addr; | |
0d16ee5d | 315 | rs6000_ptrace64 (PT_WRITE_GPR, PIDGET (inferior_ptid), nr, 0, &buf); |
c906108c SS |
316 | } |
317 | } | |
318 | ||
7a78ae4e | 319 | if (errno) |
c906108c | 320 | { |
9b20d036 | 321 | perror (_("ptrace write")); |
7a78ae4e | 322 | errno = 0; |
c906108c | 323 | } |
7a78ae4e | 324 | } |
c906108c | 325 | |
7a78ae4e | 326 | /* Read from the inferior all registers if REGNO == -1 and just register |
0df8b418 | 327 | REGNO otherwise. */ |
c906108c | 328 | |
037a727e | 329 | static void |
28439f5e PA |
330 | rs6000_fetch_inferior_registers (struct target_ops *ops, |
331 | struct regcache *regcache, int regno) | |
7a78ae4e | 332 | { |
8b164abb | 333 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
7a78ae4e | 334 | if (regno != -1) |
56be3814 | 335 | fetch_register (regcache, regno); |
7a78ae4e ND |
336 | |
337 | else | |
c906108c | 338 | { |
8b164abb | 339 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
7a78ae4e | 340 | |
dd7be90a KB |
341 | /* Read 32 general purpose registers. */ |
342 | for (regno = tdep->ppc_gp0_regnum; | |
8bf659e8 | 343 | regno < tdep->ppc_gp0_regnum + ppc_num_gprs; |
dd7be90a KB |
344 | regno++) |
345 | { | |
56be3814 | 346 | fetch_register (regcache, regno); |
dd7be90a KB |
347 | } |
348 | ||
349 | /* Read general purpose floating point registers. */ | |
383f0f5b JB |
350 | if (tdep->ppc_fp0_regnum >= 0) |
351 | for (regno = 0; regno < ppc_num_fprs; regno++) | |
56be3814 | 352 | fetch_register (regcache, tdep->ppc_fp0_regnum + regno); |
7a78ae4e | 353 | |
dd7be90a | 354 | /* Read special registers. */ |
8b164abb | 355 | fetch_register (regcache, gdbarch_pc_regnum (gdbarch)); |
56be3814 UW |
356 | fetch_register (regcache, tdep->ppc_ps_regnum); |
357 | fetch_register (regcache, tdep->ppc_cr_regnum); | |
358 | fetch_register (regcache, tdep->ppc_lr_regnum); | |
359 | fetch_register (regcache, tdep->ppc_ctr_regnum); | |
360 | fetch_register (regcache, tdep->ppc_xer_regnum); | |
383f0f5b | 361 | if (tdep->ppc_fpscr_regnum >= 0) |
56be3814 | 362 | fetch_register (regcache, tdep->ppc_fpscr_regnum); |
dd7be90a | 363 | if (tdep->ppc_mq_regnum >= 0) |
56be3814 | 364 | fetch_register (regcache, tdep->ppc_mq_regnum); |
c906108c | 365 | } |
7a78ae4e | 366 | } |
c906108c | 367 | |
7a78ae4e ND |
368 | /* Store our register values back into the inferior. |
369 | If REGNO is -1, do this for all registers. | |
370 | Otherwise, REGNO specifies which register (so we can save time). */ | |
371 | ||
037a727e | 372 | static void |
28439f5e PA |
373 | rs6000_store_inferior_registers (struct target_ops *ops, |
374 | struct regcache *regcache, int regno) | |
7a78ae4e | 375 | { |
8b164abb | 376 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
7a78ae4e | 377 | if (regno != -1) |
56be3814 | 378 | store_register (regcache, regno); |
7a78ae4e ND |
379 | |
380 | else | |
f6077098 | 381 | { |
8b164abb | 382 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
dd7be90a KB |
383 | |
384 | /* Write general purpose registers first. */ | |
385 | for (regno = tdep->ppc_gp0_regnum; | |
8bf659e8 | 386 | regno < tdep->ppc_gp0_regnum + ppc_num_gprs; |
dd7be90a KB |
387 | regno++) |
388 | { | |
56be3814 | 389 | store_register (regcache, regno); |
dd7be90a | 390 | } |
7a78ae4e | 391 | |
dd7be90a | 392 | /* Write floating point registers. */ |
383f0f5b JB |
393 | if (tdep->ppc_fp0_regnum >= 0) |
394 | for (regno = 0; regno < ppc_num_fprs; regno++) | |
56be3814 | 395 | store_register (regcache, tdep->ppc_fp0_regnum + regno); |
7a78ae4e | 396 | |
dd7be90a | 397 | /* Write special registers. */ |
8b164abb | 398 | store_register (regcache, gdbarch_pc_regnum (gdbarch)); |
56be3814 UW |
399 | store_register (regcache, tdep->ppc_ps_regnum); |
400 | store_register (regcache, tdep->ppc_cr_regnum); | |
401 | store_register (regcache, tdep->ppc_lr_regnum); | |
402 | store_register (regcache, tdep->ppc_ctr_regnum); | |
403 | store_register (regcache, tdep->ppc_xer_regnum); | |
383f0f5b | 404 | if (tdep->ppc_fpscr_regnum >= 0) |
56be3814 | 405 | store_register (regcache, tdep->ppc_fpscr_regnum); |
dd7be90a | 406 | if (tdep->ppc_mq_regnum >= 0) |
56be3814 | 407 | store_register (regcache, tdep->ppc_mq_regnum); |
f6077098 | 408 | } |
7a78ae4e | 409 | } |
f6077098 | 410 | |
7a78ae4e | 411 | |
037a727e UW |
412 | /* Attempt a transfer all LEN bytes starting at OFFSET between the |
413 | inferior's OBJECT:ANNEX space and GDB's READBUF/WRITEBUF buffer. | |
414 | Return the number of bytes actually transferred. */ | |
7a78ae4e | 415 | |
037a727e UW |
416 | static LONGEST |
417 | rs6000_xfer_partial (struct target_ops *ops, enum target_object object, | |
418 | const char *annex, gdb_byte *readbuf, | |
419 | const gdb_byte *writebuf, | |
420 | ULONGEST offset, LONGEST len) | |
7a78ae4e | 421 | { |
037a727e | 422 | pid_t pid = ptid_get_pid (inferior_ptid); |
7a78ae4e | 423 | int arch64 = ARCH64 (); |
7a78ae4e | 424 | |
037a727e | 425 | switch (object) |
c906108c | 426 | { |
ff99b71b | 427 | case TARGET_OBJECT_LIBRARIES_AIX: |
4d1eb6b4 JB |
428 | return rs6000_xfer_shared_libraries (ops, object, annex, |
429 | readbuf, writebuf, | |
430 | offset, len); | |
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, | |
0df8b418 MS |
469 | (int *) (uintptr_t) |
470 | rounded_offset, | |
037a727e UW |
471 | 0, NULL); |
472 | } | |
473 | ||
474 | /* Copy data to be written over corresponding part of | |
475 | buffer. */ | |
476 | memcpy (buffer.byte + (offset - rounded_offset), | |
477 | writebuf, partial_len); | |
478 | ||
479 | errno = 0; | |
480 | if (arch64) | |
481 | rs6000_ptrace64 (PT_WRITE_D, pid, | |
482 | rounded_offset, buffer.word, NULL); | |
483 | else | |
484 | rs6000_ptrace32 (PT_WRITE_D, pid, | |
0df8b418 MS |
485 | (int *) (uintptr_t) rounded_offset, |
486 | buffer.word, NULL); | |
037a727e UW |
487 | if (errno) |
488 | return 0; | |
489 | } | |
490 | ||
491 | if (readbuf) | |
492 | { | |
493 | errno = 0; | |
494 | if (arch64) | |
495 | buffer.word = rs6000_ptrace64 (PT_READ_I, pid, | |
496 | rounded_offset, 0, NULL); | |
497 | else | |
498 | buffer.word = rs6000_ptrace32 (PT_READ_I, pid, | |
499 | (int *)(uintptr_t)rounded_offset, | |
500 | 0, NULL); | |
501 | if (errno) | |
502 | return 0; | |
503 | ||
504 | /* Copy appropriate bytes out of the buffer. */ | |
505 | memcpy (readbuf, buffer.byte + (offset - rounded_offset), | |
506 | partial_len); | |
507 | } | |
508 | ||
509 | return partial_len; | |
510 | } | |
511 | ||
512 | default: | |
513 | return -1; | |
7a78ae4e | 514 | } |
c906108c SS |
515 | } |
516 | ||
482f7fee UW |
517 | /* Wait for the child specified by PTID to do something. Return the |
518 | process ID of the child, or MINUS_ONE_PTID in case of error; store | |
519 | the status in *OURSTATUS. */ | |
520 | ||
521 | static ptid_t | |
117de6a9 | 522 | rs6000_wait (struct target_ops *ops, |
47608cb1 | 523 | ptid_t ptid, struct target_waitstatus *ourstatus, int options) |
482f7fee UW |
524 | { |
525 | pid_t pid; | |
526 | int status, save_errno; | |
527 | ||
528 | do | |
529 | { | |
530 | set_sigint_trap (); | |
482f7fee UW |
531 | |
532 | do | |
533 | { | |
534 | pid = waitpid (ptid_get_pid (ptid), &status, 0); | |
535 | save_errno = errno; | |
536 | } | |
537 | while (pid == -1 && errno == EINTR); | |
538 | ||
482f7fee UW |
539 | clear_sigint_trap (); |
540 | ||
541 | if (pid == -1) | |
542 | { | |
543 | fprintf_unfiltered (gdb_stderr, | |
544 | _("Child process unexpectedly missing: %s.\n"), | |
545 | safe_strerror (save_errno)); | |
546 | ||
547 | /* Claim it exited with unknown signal. */ | |
548 | ourstatus->kind = TARGET_WAITKIND_SIGNALLED; | |
a493e3e2 | 549 | ourstatus->value.sig = GDB_SIGNAL_UNKNOWN; |
fb66883a | 550 | return inferior_ptid; |
482f7fee UW |
551 | } |
552 | ||
553 | /* Ignore terminated detached child processes. */ | |
554 | if (!WIFSTOPPED (status) && pid != ptid_get_pid (inferior_ptid)) | |
555 | pid = -1; | |
556 | } | |
557 | while (pid == -1); | |
558 | ||
559 | /* AIX has a couple of strange returns from wait(). */ | |
560 | ||
561 | /* stop after load" status. */ | |
562 | if (status == 0x57c) | |
563 | ourstatus->kind = TARGET_WAITKIND_LOADED; | |
0df8b418 | 564 | /* signal 0. I have no idea why wait(2) returns with this status word. */ |
482f7fee UW |
565 | else if (status == 0x7f) |
566 | ourstatus->kind = TARGET_WAITKIND_SPURIOUS; | |
567 | /* A normal waitstatus. Let the usual macros deal with it. */ | |
568 | else | |
569 | store_waitstatus (ourstatus, status); | |
570 | ||
571 | return pid_to_ptid (pid); | |
572 | } | |
037a727e | 573 | |
c906108c SS |
574 | /* Execute one dummy breakpoint instruction. This way we give the kernel |
575 | a chance to do some housekeeping and update inferior's internal data, | |
0df8b418 | 576 | including u_area. */ |
c906108c SS |
577 | |
578 | static void | |
fb14de7b | 579 | exec_one_dummy_insn (struct regcache *regcache) |
c906108c | 580 | { |
4a7622d1 | 581 | #define DUMMY_INSN_ADDR AIX_TEXT_SEGMENT_BASE+0x200 |
c906108c | 582 | |
a6d9a66e | 583 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
7a78ae4e | 584 | int ret, status, pid; |
c906108c | 585 | CORE_ADDR prev_pc; |
8181d85f | 586 | void *bp; |
c906108c | 587 | |
0df8b418 | 588 | /* We plant one dummy breakpoint into DUMMY_INSN_ADDR address. We |
c906108c | 589 | assume that this address will never be executed again by the real |
0df8b418 | 590 | code. */ |
c906108c | 591 | |
47607d6f | 592 | bp = deprecated_insert_raw_breakpoint (gdbarch, NULL, DUMMY_INSN_ADDR); |
c906108c | 593 | |
c906108c SS |
594 | /* You might think this could be done with a single ptrace call, and |
595 | you'd be correct for just about every platform I've ever worked | |
596 | on. However, rs6000-ibm-aix4.1.3 seems to have screwed this up -- | |
597 | the inferior never hits the breakpoint (it's also worth noting | |
598 | powerpc-ibm-aix4.1.3 works correctly). */ | |
fb14de7b UW |
599 | prev_pc = regcache_read_pc (regcache); |
600 | regcache_write_pc (regcache, DUMMY_INSN_ADDR); | |
7a78ae4e | 601 | if (ARCH64 ()) |
8b5790f2 | 602 | ret = rs6000_ptrace64 (PT_CONTINUE, PIDGET (inferior_ptid), 1, 0, NULL); |
7a78ae4e | 603 | else |
0df8b418 MS |
604 | ret = rs6000_ptrace32 (PT_CONTINUE, PIDGET (inferior_ptid), |
605 | (int *) 1, 0, NULL); | |
c906108c | 606 | |
7a78ae4e | 607 | if (ret != 0) |
9b20d036 | 608 | perror (_("pt_continue")); |
c906108c | 609 | |
c5aa993b JM |
610 | do |
611 | { | |
5be4dfca | 612 | pid = waitpid (PIDGET (inferior_ptid), &status, 0); |
c5aa993b | 613 | } |
39f77062 | 614 | while (pid != PIDGET (inferior_ptid)); |
c5aa993b | 615 | |
fb14de7b | 616 | regcache_write_pc (regcache, prev_pc); |
a6d9a66e | 617 | deprecated_remove_raw_breakpoint (gdbarch, bp); |
c906108c | 618 | } |
c906108c | 619 | \f |
7a78ae4e | 620 | |
7a78ae4e | 621 | /* Set the current architecture from the host running GDB. Called when |
0df8b418 | 622 | starting a child process. */ |
7a78ae4e | 623 | |
136d6dae VP |
624 | static void (*super_create_inferior) (struct target_ops *,char *exec_file, |
625 | char *allargs, char **env, int from_tty); | |
1f480a5e | 626 | static void |
136d6dae VP |
627 | rs6000_create_inferior (struct target_ops * ops, char *exec_file, |
628 | char *allargs, char **env, int from_tty) | |
7a78ae4e ND |
629 | { |
630 | enum bfd_architecture arch; | |
631 | unsigned long mach; | |
632 | bfd abfd; | |
633 | struct gdbarch_info info; | |
634 | ||
136d6dae | 635 | super_create_inferior (ops, exec_file, allargs, env, from_tty); |
1f480a5e | 636 | |
7a78ae4e ND |
637 | if (__power_rs ()) |
638 | { | |
639 | arch = bfd_arch_rs6000; | |
640 | mach = bfd_mach_rs6k; | |
641 | } | |
642 | else | |
643 | { | |
644 | arch = bfd_arch_powerpc; | |
645 | mach = bfd_mach_ppc; | |
646 | } | |
19caaa45 PS |
647 | |
648 | /* FIXME: schauer/2002-02-25: | |
649 | We don't know if we are executing a 32 or 64 bit executable, | |
650 | and have no way to pass the proper word size to rs6000_gdbarch_init. | |
651 | So we have to avoid switching to a new architecture, if the architecture | |
652 | matches already. | |
653 | Blindly calling rs6000_gdbarch_init used to work in older versions of | |
654 | GDB, as rs6000_gdbarch_init incorrectly used the previous tdep to | |
655 | determine the wordsize. */ | |
656 | if (exec_bfd) | |
657 | { | |
658 | const struct bfd_arch_info *exec_bfd_arch_info; | |
659 | ||
660 | exec_bfd_arch_info = bfd_get_arch_info (exec_bfd); | |
661 | if (arch == exec_bfd_arch_info->arch) | |
662 | return; | |
663 | } | |
664 | ||
7a78ae4e ND |
665 | bfd_default_set_arch_mach (&abfd, arch, mach); |
666 | ||
fb6ecb0f | 667 | gdbarch_info_init (&info); |
7a78ae4e | 668 | info.bfd_arch_info = bfd_get_arch_info (&abfd); |
7aea86e6 | 669 | info.abfd = exec_bfd; |
7a78ae4e | 670 | |
16f33e29 | 671 | if (!gdbarch_update_p (info)) |
e2e0b3e5 | 672 | internal_error (__FILE__, __LINE__, |
0df8b418 MS |
673 | _("rs6000_create_inferior: failed " |
674 | "to select architecture")); | |
7a78ae4e | 675 | } |
c906108c | 676 | \f |
c906108c | 677 | |
4d1eb6b4 | 678 | /* Shared Object support. */ |
c906108c | 679 | |
4d1eb6b4 JB |
680 | /* Return the LdInfo data for the given process. Raises an error |
681 | if the data could not be obtained. | |
8d08c9ce | 682 | |
4d1eb6b4 | 683 | The returned value must be deallocated after use. */ |
c906108c | 684 | |
4d1eb6b4 JB |
685 | static LdInfo * |
686 | rs6000_ptrace_ldinfo (ptid_t ptid) | |
687 | { | |
688 | const int pid = ptid_get_pid (ptid); | |
689 | int ldi_size = 1024; | |
690 | LdInfo *ldi = xmalloc (ldi_size); | |
691 | int rc = -1; | |
7a78ae4e | 692 | |
4d1eb6b4 JB |
693 | while (1) |
694 | { | |
695 | if (ARCH64 ()) | |
696 | rc = rs6000_ptrace64 (PT_LDINFO, pid, (unsigned long) ldi, ldi_size, | |
697 | NULL); | |
c18e0d23 | 698 | else |
4d1eb6b4 JB |
699 | rc = rs6000_ptrace32 (PT_LDINFO, pid, (int *) ldi, ldi_size, NULL); |
700 | ||
701 | if (rc != -1) | |
702 | break; /* Success, we got the entire ld_info data. */ | |
703 | ||
704 | if (errno != ENOMEM) | |
705 | perror_with_name (_("ptrace ldinfo")); | |
706 | ||
707 | /* ldi is not big enough. Double it and try again. */ | |
708 | ldi_size *= 2; | |
709 | ldi = xrealloc (ldi, ldi_size); | |
710 | } | |
711 | ||
712 | return ldi; | |
c906108c | 713 | } |
c906108c | 714 | |
4d1eb6b4 JB |
715 | /* Assuming ABFD refers to a core file, return the LdInfo data |
716 | stored in that core file. Raises an error if the data could | |
717 | not be read or extracted. | |
c906108c | 718 | |
4d1eb6b4 JB |
719 | The returned value much be deallocated after use. */ |
720 | ||
721 | static LdInfo * | |
722 | rs6000_core_ldinfo (bfd *abfd) | |
c906108c | 723 | { |
7be0c536 | 724 | struct bfd_section *ldinfo_sec; |
4d1eb6b4 JB |
725 | int ldinfo_size; |
726 | gdb_byte *ldinfo_buf; | |
727 | struct cleanup *cleanup; | |
7a78ae4e | 728 | |
4d1eb6b4 JB |
729 | ldinfo_sec = bfd_get_section_by_name (abfd, ".ldinfo"); |
730 | if (ldinfo_sec == NULL) | |
2f565103 | 731 | error (_("cannot find .ldinfo section from core file: %s"), |
4d1eb6b4 JB |
732 | bfd_errmsg (bfd_get_error ())); |
733 | ldinfo_size = bfd_get_section_size (ldinfo_sec); | |
c906108c | 734 | |
4d1eb6b4 JB |
735 | ldinfo_buf = xmalloc (ldinfo_size); |
736 | cleanup = make_cleanup (xfree, ldinfo_buf); | |
c5aa993b | 737 | |
4d1eb6b4 JB |
738 | if (! bfd_get_section_contents (abfd, ldinfo_sec, |
739 | ldinfo_buf, 0, ldinfo_size)) | |
2f565103 | 740 | error (_("unable to read .ldinfo section from core file: %s"), |
4d1eb6b4 JB |
741 | bfd_errmsg (bfd_get_error ())); |
742 | ||
743 | discard_cleanups (cleanup); | |
744 | return (LdInfo *) ldinfo_buf; | |
745 | } | |
746 | ||
747 | /* Append to OBJSTACK an XML string description of the shared library | |
ff99b71b | 748 | corresponding to LDI, following the TARGET_OBJECT_LIBRARIES_AIX |
4d1eb6b4 JB |
749 | format. */ |
750 | ||
751 | static void | |
752 | rs6000_xfer_shared_library (LdInfo *ldi, struct obstack *obstack) | |
753 | { | |
754 | const int arch64 = ARCH64 (); | |
755 | const char *archive_name = LDI_FILENAME (ldi, arch64); | |
756 | const char *member_name = archive_name + strlen (archive_name) + 1; | |
757 | CORE_ADDR text_addr, data_addr; | |
758 | ULONGEST text_size, data_size; | |
759 | char *p; | |
760 | ||
761 | if (arch64) | |
c906108c | 762 | { |
4d1eb6b4 JB |
763 | text_addr = ldi->l64.ldinfo_textorg; |
764 | text_size = ldi->l64.ldinfo_textsize; | |
765 | data_addr = ldi->l64.ldinfo_dataorg; | |
766 | data_size = ldi->l64.ldinfo_datasize; | |
c906108c | 767 | } |
4d1eb6b4 | 768 | else |
c906108c | 769 | { |
4d1eb6b4 JB |
770 | /* The text and data addresses are defined as pointers. |
771 | To avoid sign-extending their value in the assignments | |
772 | below, we cast their value to unsigned long first. */ | |
773 | text_addr = (unsigned long) ldi->l32.ldinfo_textorg; | |
774 | text_size = ldi->l32.ldinfo_textsize; | |
775 | data_addr = (unsigned long) ldi->l32.ldinfo_dataorg; | |
776 | data_size = ldi->l32.ldinfo_datasize; | |
777 | } | |
c906108c | 778 | |
4d1eb6b4 JB |
779 | obstack_grow_str (obstack, "<library name=\""); |
780 | p = xml_escape_text (archive_name); | |
781 | obstack_grow_str (obstack, p); | |
782 | xfree (p); | |
783 | obstack_grow_str (obstack, "\""); | |
c906108c | 784 | |
4d1eb6b4 JB |
785 | if (member_name[0] != '\0') |
786 | { | |
787 | obstack_grow_str (obstack, " member=\""); | |
788 | p = xml_escape_text (member_name); | |
789 | obstack_grow_str (obstack, p); | |
790 | xfree (p); | |
791 | obstack_grow_str (obstack, "\""); | |
792 | } | |
c906108c | 793 | |
4d1eb6b4 JB |
794 | obstack_grow_str (obstack, " text_addr=\""); |
795 | obstack_grow_str (obstack, core_addr_to_string (text_addr)); | |
796 | obstack_grow_str (obstack, "\""); | |
c906108c | 797 | |
4d1eb6b4 JB |
798 | obstack_grow_str (obstack, " text_size=\""); |
799 | obstack_grow_str (obstack, pulongest (text_size)); | |
800 | obstack_grow_str (obstack, "\""); | |
c5aa993b | 801 | |
4d1eb6b4 JB |
802 | obstack_grow_str (obstack, " data_addr=\""); |
803 | obstack_grow_str (obstack, core_addr_to_string (data_addr)); | |
804 | obstack_grow_str (obstack, "\""); | |
c906108c | 805 | |
4d1eb6b4 JB |
806 | obstack_grow_str (obstack, " data_size=\""); |
807 | obstack_grow_str (obstack, pulongest (data_size)); | |
808 | obstack_grow_str (obstack, "\""); | |
63f58cc5 | 809 | |
4d1eb6b4 JB |
810 | obstack_grow_str (obstack, "></library>"); |
811 | } | |
c906108c | 812 | |
4d1eb6b4 | 813 | /* Implement the to_xfer_partial target_ops method for |
ff99b71b | 814 | TARGET_OBJECT_LIBRARIES_AIX objects. */ |
6426a772 | 815 | |
4d1eb6b4 JB |
816 | static LONGEST |
817 | rs6000_xfer_shared_libraries | |
818 | (struct target_ops *ops, enum target_object object, | |
819 | const char *annex, gdb_byte *readbuf, const gdb_byte *writebuf, | |
820 | ULONGEST offset, LONGEST len) | |
821 | { | |
822 | const int arch64 = ARCH64 (); | |
823 | LdInfo *ldi_data; | |
824 | LdInfo *ldi; | |
825 | struct obstack obstack; | |
826 | const char *buf; | |
827 | LONGEST len_avail; | |
c906108c | 828 | |
4d1eb6b4 JB |
829 | if (writebuf) |
830 | return -1; | |
c5aa993b | 831 | |
4d1eb6b4 JB |
832 | /* Get the ldinfo raw data: If debugging a live process, we get it |
833 | using ptrace. Otherwise, the info is stored in the .ldinfo | |
834 | section of the core file. */ | |
835 | ||
836 | if (target_has_execution) | |
837 | ldi_data = rs6000_ptrace_ldinfo (inferior_ptid); | |
838 | else | |
839 | ldi_data = rs6000_core_ldinfo (core_bfd); | |
840 | ||
841 | /* Convert the raw data into an XML representation. */ | |
c906108c | 842 | |
4d1eb6b4 | 843 | obstack_init (&obstack); |
8c56e112 | 844 | obstack_grow_str (&obstack, "<library-list-aix version=\"1.0\">\n"); |
e42dc924 | 845 | |
4d1eb6b4 JB |
846 | ldi = ldi_data; |
847 | while (1) | |
848 | { | |
849 | /* Close the fd. We cannot use it, because we cannot assume | |
850 | that the user of this descriptor will be in the same | |
851 | process. */ | |
852 | close (LDI_FD (ldi, arch64)); | |
853 | ||
854 | rs6000_xfer_shared_library (ldi, &obstack); | |
855 | ||
856 | if (!LDI_NEXT (ldi, arch64)) | |
857 | break; | |
858 | ldi = (LdInfo *) ((char *) ldi + LDI_NEXT (ldi, arch64)); | |
c5aa993b | 859 | } |
c906108c | 860 | |
4d1eb6b4 JB |
861 | xfree (ldi_data); |
862 | ||
8c56e112 | 863 | obstack_grow_str0 (&obstack, "</library-list-aix>\n"); |
c906108c | 864 | |
4d1eb6b4 JB |
865 | buf = obstack_finish (&obstack); |
866 | len_avail = strlen (buf); | |
867 | if (offset >= len_avail) | |
868 | len= 0; | |
869 | else | |
c906108c | 870 | { |
4d1eb6b4 JB |
871 | if (len > len_avail - offset) |
872 | len = len_avail - offset; | |
873 | memcpy (readbuf, buf + offset, len); | |
c906108c | 874 | } |
4d1eb6b4 JB |
875 | |
876 | obstack_free (&obstack, NULL); | |
877 | return len; | |
c906108c | 878 | } |
c906108c | 879 | |
e1aca11e JB |
880 | void _initialize_rs6000_nat (void); |
881 | ||
c906108c | 882 | void |
7a61a01c | 883 | _initialize_rs6000_nat (void) |
c906108c | 884 | { |
037a727e UW |
885 | struct target_ops *t; |
886 | ||
887 | t = inf_ptrace_target (); | |
888 | t->to_fetch_registers = rs6000_fetch_inferior_registers; | |
889 | t->to_store_registers = rs6000_store_inferior_registers; | |
890 | t->to_xfer_partial = rs6000_xfer_partial; | |
1f480a5e UW |
891 | |
892 | super_create_inferior = t->to_create_inferior; | |
893 | t->to_create_inferior = rs6000_create_inferior; | |
894 | ||
482f7fee UW |
895 | t->to_wait = rs6000_wait; |
896 | ||
037a727e | 897 | add_target (t); |
c906108c | 898 | } |