Commit | Line | Data |
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5bf970f9 AC |
1 | /* Default child (native) target interface, for GDB when running under |
2 | Unix. | |
3 | ||
0b302171 JB |
4 | Copyright (C) 1988-1996, 1998-2002, 2004-2005, 2007-2012 Free |
5 | Software Foundation, Inc. | |
5bf970f9 AC |
6 | |
7 | This file is part of GDB. | |
8 | ||
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 |
5bf970f9 AC |
12 | (at your option) any later version. |
13 | ||
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. | |
18 | ||
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/>. */ |
5bf970f9 AC |
21 | |
22 | #include "defs.h" | |
23 | #include "regcache.h" | |
24 | #include "memattr.h" | |
25 | #include "symtab.h" | |
26 | #include "target.h" | |
27 | #include "inferior.h" | |
7681f339 | 28 | #include "gdb_string.h" |
a71b5a38 | 29 | #include "gdb_stat.h" |
2c0b251b | 30 | #include "inf-child.h" |
7313baad | 31 | #include "gdb/fileio.h" |
5808517f | 32 | #include "agent.h" |
7313baad | 33 | |
b9e7b9c3 UW |
34 | #ifdef HAVE_SYS_PARAM_H |
35 | #include <sys/param.h> /* for MAXPATHLEN */ | |
36 | #endif | |
7313baad | 37 | #include <sys/types.h> |
7313baad UW |
38 | #include <fcntl.h> |
39 | #include <unistd.h> | |
5bf970f9 AC |
40 | |
41 | /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this | |
42 | for all registers. */ | |
43 | ||
44 | static void | |
28439f5e PA |
45 | inf_child_fetch_inferior_registers (struct target_ops *ops, |
46 | struct regcache *regcache, int regnum) | |
5bf970f9 AC |
47 | { |
48 | if (regnum == -1) | |
49 | { | |
b1a653ae UW |
50 | for (regnum = 0; |
51 | regnum < gdbarch_num_regs (get_regcache_arch (regcache)); | |
52 | regnum++) | |
56be3814 | 53 | regcache_raw_supply (regcache, regnum, NULL); |
5bf970f9 AC |
54 | } |
55 | else | |
56be3814 | 56 | regcache_raw_supply (regcache, regnum, NULL); |
5bf970f9 AC |
57 | } |
58 | ||
59 | /* Store register REGNUM back into the inferior. If REGNUM is -1, do | |
60 | this for all registers (including the floating point registers). */ | |
61 | ||
62 | static void | |
28439f5e PA |
63 | inf_child_store_inferior_registers (struct target_ops *ops, |
64 | struct regcache *regcache, int regnum) | |
5bf970f9 AC |
65 | { |
66 | } | |
67 | ||
5bf970f9 AC |
68 | static void |
69 | inf_child_post_attach (int pid) | |
70 | { | |
71 | /* This version of Unix doesn't require a meaningful "post attach" | |
72 | operation by a debugger. */ | |
73 | } | |
74 | ||
75 | /* Get ready to modify the registers array. On machines which store | |
76 | individual registers, this doesn't need to do anything. On | |
77 | machines which store all the registers in one fell swoop, this | |
78 | makes sure that registers contains all the registers from the | |
79 | program being debugged. */ | |
80 | ||
81 | static void | |
316f2060 | 82 | inf_child_prepare_to_store (struct regcache *regcache) |
5bf970f9 AC |
83 | { |
84 | } | |
85 | ||
86 | static void | |
87 | inf_child_open (char *arg, int from_tty) | |
88 | { | |
8a3fe4f8 | 89 | error (_("Use the \"run\" command to start a Unix child process.")); |
5bf970f9 AC |
90 | } |
91 | ||
92 | static void | |
93 | inf_child_post_startup_inferior (ptid_t ptid) | |
94 | { | |
95 | /* This version of Unix doesn't require a meaningful "post startup | |
96 | inferior" operation by a debugger. */ | |
97 | } | |
98 | ||
5bf970f9 | 99 | static int |
ee057212 | 100 | inf_child_follow_fork (struct target_ops *ops, int follow_child) |
5bf970f9 AC |
101 | { |
102 | /* This version of Unix doesn't support following fork or vfork | |
103 | events. */ | |
104 | return 0; | |
105 | } | |
106 | ||
5bf970f9 AC |
107 | static int |
108 | inf_child_can_run (void) | |
109 | { | |
110 | return 1; | |
111 | } | |
112 | ||
5bf970f9 AC |
113 | static char * |
114 | inf_child_pid_to_exec_file (int pid) | |
115 | { | |
116 | /* This version of Unix doesn't support translation of a process ID | |
117 | to the filename of the executable file. */ | |
118 | return NULL; | |
119 | } | |
120 | ||
7313baad UW |
121 | |
122 | /* Target file operations. */ | |
123 | ||
124 | static int | |
125 | inf_child_fileio_open_flags_to_host (int fileio_open_flags, int *open_flags_p) | |
126 | { | |
127 | int open_flags = 0; | |
128 | ||
129 | if (fileio_open_flags & ~FILEIO_O_SUPPORTED) | |
130 | return -1; | |
131 | ||
132 | if (fileio_open_flags & FILEIO_O_CREAT) | |
133 | open_flags |= O_CREAT; | |
134 | if (fileio_open_flags & FILEIO_O_EXCL) | |
135 | open_flags |= O_EXCL; | |
136 | if (fileio_open_flags & FILEIO_O_TRUNC) | |
137 | open_flags |= O_TRUNC; | |
138 | if (fileio_open_flags & FILEIO_O_APPEND) | |
139 | open_flags |= O_APPEND; | |
140 | if (fileio_open_flags & FILEIO_O_RDONLY) | |
141 | open_flags |= O_RDONLY; | |
142 | if (fileio_open_flags & FILEIO_O_WRONLY) | |
143 | open_flags |= O_WRONLY; | |
144 | if (fileio_open_flags & FILEIO_O_RDWR) | |
145 | open_flags |= O_RDWR; | |
146 | /* On systems supporting binary and text mode, always open files in | |
147 | binary mode. */ | |
148 | #ifdef O_BINARY | |
149 | open_flags |= O_BINARY; | |
150 | #endif | |
151 | ||
152 | *open_flags_p = open_flags; | |
153 | return 0; | |
154 | } | |
155 | ||
156 | static int | |
157 | inf_child_errno_to_fileio_error (int errnum) | |
158 | { | |
159 | switch (errnum) | |
160 | { | |
161 | case EPERM: | |
162 | return FILEIO_EPERM; | |
163 | case ENOENT: | |
164 | return FILEIO_ENOENT; | |
165 | case EINTR: | |
166 | return FILEIO_EINTR; | |
167 | case EIO: | |
168 | return FILEIO_EIO; | |
169 | case EBADF: | |
170 | return FILEIO_EBADF; | |
171 | case EACCES: | |
172 | return FILEIO_EACCES; | |
173 | case EFAULT: | |
174 | return FILEIO_EFAULT; | |
175 | case EBUSY: | |
176 | return FILEIO_EBUSY; | |
177 | case EEXIST: | |
178 | return FILEIO_EEXIST; | |
179 | case ENODEV: | |
180 | return FILEIO_ENODEV; | |
181 | case ENOTDIR: | |
182 | return FILEIO_ENOTDIR; | |
183 | case EISDIR: | |
184 | return FILEIO_EISDIR; | |
185 | case EINVAL: | |
186 | return FILEIO_EINVAL; | |
187 | case ENFILE: | |
188 | return FILEIO_ENFILE; | |
189 | case EMFILE: | |
190 | return FILEIO_EMFILE; | |
191 | case EFBIG: | |
192 | return FILEIO_EFBIG; | |
193 | case ENOSPC: | |
194 | return FILEIO_ENOSPC; | |
195 | case ESPIPE: | |
196 | return FILEIO_ESPIPE; | |
197 | case EROFS: | |
198 | return FILEIO_EROFS; | |
199 | case ENOSYS: | |
200 | return FILEIO_ENOSYS; | |
201 | case ENAMETOOLONG: | |
202 | return FILEIO_ENAMETOOLONG; | |
203 | } | |
204 | return FILEIO_EUNKNOWN; | |
205 | } | |
206 | ||
207 | /* Open FILENAME on the target, using FLAGS and MODE. Return a | |
208 | target file descriptor, or -1 if an error occurs (and set | |
209 | *TARGET_ERRNO). */ | |
210 | static int | |
211 | inf_child_fileio_open (const char *filename, int flags, int mode, | |
212 | int *target_errno) | |
213 | { | |
214 | int nat_flags; | |
215 | int fd; | |
216 | ||
217 | if (inf_child_fileio_open_flags_to_host (flags, &nat_flags) == -1) | |
218 | { | |
219 | *target_errno = FILEIO_EINVAL; | |
220 | return -1; | |
221 | } | |
222 | ||
223 | /* We do not need to convert MODE, since the fileio protocol uses | |
224 | the standard values. */ | |
225 | fd = open (filename, nat_flags, mode); | |
226 | if (fd == -1) | |
227 | *target_errno = inf_child_errno_to_fileio_error (errno); | |
228 | ||
229 | return fd; | |
230 | } | |
231 | ||
232 | /* Write up to LEN bytes from WRITE_BUF to FD on the target. | |
233 | Return the number of bytes written, or -1 if an error occurs | |
234 | (and set *TARGET_ERRNO). */ | |
235 | static int | |
236 | inf_child_fileio_pwrite (int fd, const gdb_byte *write_buf, int len, | |
237 | ULONGEST offset, int *target_errno) | |
238 | { | |
239 | int ret; | |
240 | ||
241 | #ifdef HAVE_PWRITE | |
242 | ret = pwrite (fd, write_buf, len, (long) offset); | |
243 | #else | |
244 | ret = lseek (fd, (long) offset, SEEK_SET); | |
245 | if (ret != -1) | |
246 | ret = write (fd, write_buf, len); | |
247 | #endif | |
248 | ||
249 | if (ret == -1) | |
250 | *target_errno = inf_child_errno_to_fileio_error (errno); | |
251 | ||
252 | return ret; | |
253 | } | |
254 | ||
255 | /* Read up to LEN bytes FD on the target into READ_BUF. | |
256 | Return the number of bytes read, or -1 if an error occurs | |
257 | (and set *TARGET_ERRNO). */ | |
258 | static int | |
259 | inf_child_fileio_pread (int fd, gdb_byte *read_buf, int len, | |
260 | ULONGEST offset, int *target_errno) | |
261 | { | |
262 | int ret; | |
263 | ||
264 | #ifdef HAVE_PREAD | |
265 | ret = pread (fd, read_buf, len, (long) offset); | |
266 | #else | |
267 | ret = lseek (fd, (long) offset, SEEK_SET); | |
268 | if (ret != -1) | |
269 | ret = read (fd, read_buf, len); | |
270 | #endif | |
271 | ||
272 | if (ret == -1) | |
273 | *target_errno = inf_child_errno_to_fileio_error (errno); | |
274 | ||
275 | return ret; | |
276 | } | |
277 | ||
278 | /* Close FD on the target. Return 0, or -1 if an error occurs | |
279 | (and set *TARGET_ERRNO). */ | |
280 | static int | |
281 | inf_child_fileio_close (int fd, int *target_errno) | |
282 | { | |
283 | int ret; | |
284 | ||
285 | ret = close (fd); | |
286 | if (ret == -1) | |
287 | *target_errno = inf_child_errno_to_fileio_error (errno); | |
288 | ||
289 | return ret; | |
290 | } | |
291 | ||
292 | /* Unlink FILENAME on the target. Return 0, or -1 if an error | |
293 | occurs (and set *TARGET_ERRNO). */ | |
294 | static int | |
295 | inf_child_fileio_unlink (const char *filename, int *target_errno) | |
296 | { | |
297 | int ret; | |
298 | ||
299 | ret = unlink (filename); | |
300 | if (ret == -1) | |
301 | *target_errno = inf_child_errno_to_fileio_error (errno); | |
302 | ||
303 | return ret; | |
304 | } | |
305 | ||
b9e7b9c3 UW |
306 | /* Read value of symbolic link FILENAME on the target. Return a |
307 | null-terminated string allocated via xmalloc, or NULL if an error | |
308 | occurs (and set *TARGET_ERRNO). */ | |
309 | static char * | |
310 | inf_child_fileio_readlink (const char *filename, int *target_errno) | |
311 | { | |
312 | /* We support readlink only on systems that also provide a compile-time | |
313 | maximum path length (MAXPATHLEN), at least for now. */ | |
314 | #if defined (HAVE_READLINK) && defined (MAXPATHLEN) | |
315 | char buf[MAXPATHLEN]; | |
316 | int len; | |
317 | char *ret; | |
318 | ||
319 | len = readlink (filename, buf, sizeof buf); | |
320 | if (len < 0) | |
321 | { | |
322 | *target_errno = inf_child_errno_to_fileio_error (errno); | |
323 | return NULL; | |
324 | } | |
325 | ||
326 | ret = xmalloc (len + 1); | |
327 | memcpy (ret, buf, len); | |
328 | ret[len] = '\0'; | |
329 | return ret; | |
330 | #else | |
331 | *target_errno = FILEIO_ENOSYS; | |
332 | return NULL; | |
333 | #endif | |
334 | } | |
335 | ||
5808517f YQ |
336 | static int |
337 | inf_child_use_agent (int use) | |
338 | { | |
339 | if (agent_loaded_p ()) | |
340 | { | |
341 | use_agent = use; | |
342 | return 1; | |
343 | } | |
344 | else | |
345 | return 0; | |
346 | } | |
347 | ||
348 | static int | |
349 | inf_child_can_use_agent (void) | |
350 | { | |
351 | return agent_loaded_p (); | |
352 | } | |
7313baad | 353 | |
5bf970f9 AC |
354 | struct target_ops * |
355 | inf_child_target (void) | |
356 | { | |
357 | struct target_ops *t = XZALLOC (struct target_ops); | |
abbb1732 | 358 | |
5bf970f9 AC |
359 | t->to_shortname = "child"; |
360 | t->to_longname = "Unix child process"; | |
361 | t->to_doc = "Unix child process (started by the \"run\" command)."; | |
362 | t->to_open = inf_child_open; | |
363 | t->to_post_attach = inf_child_post_attach; | |
7681f339 AC |
364 | t->to_fetch_registers = inf_child_fetch_inferior_registers; |
365 | t->to_store_registers = inf_child_store_inferior_registers; | |
5bf970f9 AC |
366 | t->to_prepare_to_store = inf_child_prepare_to_store; |
367 | t->to_insert_breakpoint = memory_insert_breakpoint; | |
368 | t->to_remove_breakpoint = memory_remove_breakpoint; | |
369 | t->to_terminal_init = terminal_init_inferior; | |
370 | t->to_terminal_inferior = terminal_inferior; | |
371 | t->to_terminal_ours_for_output = terminal_ours_for_output; | |
372 | t->to_terminal_save_ours = terminal_save_ours; | |
373 | t->to_terminal_ours = terminal_ours; | |
374 | t->to_terminal_info = child_terminal_info; | |
375 | t->to_post_startup_inferior = inf_child_post_startup_inferior; | |
5bf970f9 | 376 | t->to_follow_fork = inf_child_follow_fork; |
5bf970f9 | 377 | t->to_can_run = inf_child_can_run; |
5bf970f9 AC |
378 | t->to_pid_to_exec_file = inf_child_pid_to_exec_file; |
379 | t->to_stratum = process_stratum; | |
c35b1492 PA |
380 | t->to_has_all_memory = default_child_has_all_memory; |
381 | t->to_has_memory = default_child_has_memory; | |
382 | t->to_has_stack = default_child_has_stack; | |
383 | t->to_has_registers = default_child_has_registers; | |
384 | t->to_has_execution = default_child_has_execution; | |
7313baad UW |
385 | t->to_fileio_open = inf_child_fileio_open; |
386 | t->to_fileio_pwrite = inf_child_fileio_pwrite; | |
387 | t->to_fileio_pread = inf_child_fileio_pread; | |
388 | t->to_fileio_close = inf_child_fileio_close; | |
389 | t->to_fileio_unlink = inf_child_fileio_unlink; | |
b9e7b9c3 | 390 | t->to_fileio_readlink = inf_child_fileio_readlink; |
5bf970f9 | 391 | t->to_magic = OPS_MAGIC; |
5808517f YQ |
392 | t->to_use_agent = inf_child_use_agent; |
393 | t->to_can_use_agent = inf_child_can_use_agent; | |
5bf970f9 AC |
394 | return t; |
395 | } |