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fb0e1ba7 MK |
1 | /* <proc_service.h> implementation. |
2 | Copyright 1999, 2000 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of GDB. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 59 Temple Place - Suite 330, | |
19 | Boston, MA 02111-1307, USA. */ | |
20 | ||
21 | #include "defs.h" | |
22 | ||
23 | #include "gdb_proc_service.h" | |
24 | #include <sys/procfs.h> | |
25 | ||
26 | #include "inferior.h" | |
27 | #include "symtab.h" | |
28 | #include "target.h" | |
29 | ||
30 | /* Prototypes for supply_gregset etc. */ | |
31 | #include "gregset.h" | |
32 | \f | |
33 | ||
34 | /* Fix-up some broken systems. */ | |
35 | ||
36 | /* The prototypes in <proc_service.h> are slightly different on older | |
37 | systems. Compensate for the discrepancies. */ | |
38 | ||
39 | #ifdef PROC_SERVICE_IS_OLD | |
40 | typedef const struct ps_prochandle *gdb_ps_prochandle_t; | |
41 | typedef char *gdb_ps_read_buf_t; | |
42 | typedef char *gdb_ps_write_buf_t; | |
43 | typedef int gdb_ps_size_t; | |
44 | #else | |
45 | typedef struct ps_prochandle *gdb_ps_prochandle_t; | |
46 | typedef void *gdb_ps_read_buf_t; | |
47 | typedef const void *gdb_ps_write_buf_t; | |
48 | typedef size_t gdb_ps_size_t; | |
49 | #endif | |
50 | \f | |
51 | ||
52 | /* Building process ids. */ | |
53 | ||
54 | #ifndef MERGEPID | |
55 | #define MERGEPID(PID, TID) (((PID) & 0xffff) | ((TID) << 16)) | |
56 | #endif | |
57 | ||
58 | #define BUILD_LWP(tid, pid) MERGEPID (pid, tid) | |
59 | \f | |
60 | ||
61 | /* Helper functions. */ | |
62 | ||
63 | static void | |
64 | restore_inferior_pid (void *arg) | |
65 | { | |
66 | int *saved_pid_ptr = arg; | |
67 | inferior_pid = *saved_pid_ptr; | |
b8c9b27d | 68 | xfree (arg); |
fb0e1ba7 MK |
69 | } |
70 | ||
71 | static struct cleanup * | |
72 | save_inferior_pid (void) | |
73 | { | |
74 | int *saved_pid_ptr; | |
75 | ||
76 | saved_pid_ptr = xmalloc (sizeof (int)); | |
77 | *saved_pid_ptr = inferior_pid; | |
78 | return make_cleanup (restore_inferior_pid, saved_pid_ptr); | |
79 | } | |
80 | ||
81 | /* Transfer LEN bytes of memory between BUF and address ADDR in the | |
82 | process specified by PH. If WRITE, transfer them to the process, | |
83 | else transfer them from the process. Returns PS_OK for success, | |
84 | PS_ERR on failure. | |
85 | ||
86 | This is a helper function for ps_pdread, ps_pdwrite, ps_ptread and | |
87 | ps_ptwrite. */ | |
88 | ||
89 | static ps_err_e | |
90 | ps_xfer_memory (const struct ps_prochandle *ph, paddr_t addr, | |
91 | char *buf, size_t len, int write) | |
92 | { | |
93 | struct cleanup *old_chain = save_inferior_pid (); | |
94 | int ret; | |
95 | ||
96 | inferior_pid = ph->pid; | |
97 | ||
98 | if (write) | |
99 | ret = target_write_memory (addr, buf, len); | |
100 | else | |
101 | ret = target_read_memory (addr, buf, len); | |
102 | ||
103 | do_cleanups (old_chain); | |
104 | ||
105 | return (ret == 0 ? PS_OK : PS_ERR); | |
106 | } | |
107 | \f | |
108 | ||
109 | /* Stop the target process PH. */ | |
110 | ||
111 | ps_err_e | |
112 | ps_pstop (gdb_ps_prochandle_t ph) | |
113 | { | |
114 | /* The process is always stopped when under control of GDB. */ | |
115 | return PS_OK; | |
116 | } | |
117 | ||
118 | /* Resume the target process PH. */ | |
119 | ||
120 | ps_err_e | |
121 | ps_pcontinue (gdb_ps_prochandle_t ph) | |
122 | { | |
123 | /* Pretend we did successfully continue the process. GDB will take | |
124 | care of it later on. */ | |
125 | return PS_OK; | |
126 | } | |
127 | ||
128 | /* Stop the lightweight process LWPID within the target process PH. */ | |
129 | ||
130 | ps_err_e | |
131 | ps_lstop (gdb_ps_prochandle_t ph, lwpid_t lwpid) | |
132 | { | |
133 | /* All lightweight processes are stopped when under control of GDB. */ | |
134 | return PS_OK; | |
135 | } | |
136 | ||
137 | /* Resume the lightweight process (LWP) LWPID within the target | |
138 | process PH. */ | |
139 | ||
140 | ps_err_e | |
141 | ps_lcontinue (gdb_ps_prochandle_t ph, lwpid_t lwpid) | |
142 | { | |
143 | /* Pretend we did successfully continue LWPID. GDB will take care | |
144 | of it later on. */ | |
145 | return PS_OK; | |
146 | } | |
147 | ||
148 | /* Get the size of the architecture-dependent extra state registers | |
149 | for LWP LWPID within the target process PH and return it in | |
150 | *XREGSIZE. */ | |
151 | ||
152 | ps_err_e | |
153 | ps_lgetxregsize (gdb_ps_prochandle_t ph, lwpid_t lwpid, int *xregsize) | |
154 | { | |
155 | /* FIXME: Not supported yet. */ | |
156 | return PS_OK; | |
157 | } | |
158 | ||
159 | /* Get the extra state registers of LWP LWPID within the target | |
160 | process PH and store them in XREGSET. */ | |
161 | ||
162 | ps_err_e | |
163 | ps_lgetxregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, caddr_t xregset) | |
164 | { | |
165 | /* FIXME: Not supported yet. */ | |
166 | return PS_OK; | |
167 | } | |
168 | ||
169 | /* Set the extra state registers of LWP LWPID within the target | |
170 | process PH from XREGSET. */ | |
171 | ||
172 | ps_err_e | |
173 | ps_lsetxregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, caddr_t xregset) | |
174 | { | |
175 | /* FIXME: Not supported yet. */ | |
176 | return PS_OK; | |
177 | } | |
178 | ||
179 | /* Log (additional) diognostic information. */ | |
180 | ||
181 | void | |
182 | ps_plog (const char *fmt, ...) | |
183 | { | |
184 | va_list args; | |
185 | ||
186 | va_start (args, fmt); | |
187 | vfprintf_filtered (gdb_stderr, fmt, args); | |
188 | } | |
189 | ||
190 | /* Search for the symbol named NAME within the object named OBJ within | |
191 | the target process PH. If the symbol is found the address of the | |
192 | symbol is stored in SYM_ADDR. */ | |
193 | ||
194 | ps_err_e | |
195 | ps_pglobal_lookup (gdb_ps_prochandle_t ph, const char *obj, | |
196 | const char *name, paddr_t *sym_addr) | |
197 | { | |
198 | struct minimal_symbol *ms; | |
199 | ||
200 | /* FIXME: kettenis/2000-09-03: What should we do with OBJ? */ | |
201 | ms = lookup_minimal_symbol (name, NULL, NULL); | |
202 | if (ms == NULL) | |
203 | return PS_NOSYM; | |
204 | ||
205 | *sym_addr = SYMBOL_VALUE_ADDRESS (ms); | |
206 | return PS_OK; | |
207 | } | |
208 | ||
209 | /* Read SIZE bytes from the target process PH at address ADDR and copy | |
210 | them into BUF. */ | |
211 | ||
212 | ps_err_e | |
213 | ps_pdread (gdb_ps_prochandle_t ph, paddr_t addr, | |
214 | gdb_ps_read_buf_t buf, gdb_ps_size_t size) | |
215 | { | |
216 | return ps_xfer_memory (ph, addr, buf, size, 0); | |
217 | } | |
218 | ||
219 | /* Write SIZE bytes from BUF into the target process PH at address ADDR. */ | |
220 | ||
221 | ps_err_e | |
222 | ps_pdwrite (gdb_ps_prochandle_t ph, paddr_t addr, | |
223 | gdb_ps_write_buf_t buf, gdb_ps_size_t size) | |
224 | { | |
225 | return ps_xfer_memory (ph, addr, (char *) buf, size, 1); | |
226 | } | |
227 | ||
228 | /* Read SIZE bytes from the target process PH at address ADDR and copy | |
229 | them into BUF. */ | |
230 | ||
231 | ps_err_e | |
232 | ps_ptread (gdb_ps_prochandle_t ph, paddr_t addr, | |
233 | gdb_ps_read_buf_t buf, gdb_ps_size_t size) | |
234 | { | |
235 | return ps_xfer_memory (ph, addr, buf, size, 0); | |
236 | } | |
237 | ||
238 | /* Write SIZE bytes from BUF into the target process PH at address ADDR. */ | |
239 | ||
240 | ps_err_e | |
241 | ps_ptwrite (gdb_ps_prochandle_t ph, paddr_t addr, | |
242 | gdb_ps_write_buf_t buf, gdb_ps_size_t size) | |
243 | { | |
244 | return ps_xfer_memory (ph, addr, (char *) buf, size, 1); | |
245 | } | |
246 | ||
247 | /* Get the general registers of LWP LWPID within the target process PH | |
248 | and store them in GREGSET. */ | |
249 | ||
250 | ps_err_e | |
251 | ps_lgetregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, prgregset_t gregset) | |
252 | { | |
253 | struct cleanup *old_chain = save_inferior_pid (); | |
254 | ||
255 | inferior_pid = BUILD_LWP (lwpid, ph->pid); | |
256 | ||
257 | target_fetch_registers (-1); | |
258 | fill_gregset ((gdb_gregset_t *) gregset, -1); | |
259 | ||
260 | do_cleanups (old_chain); | |
261 | return PS_OK; | |
262 | } | |
263 | ||
264 | /* Set the general registers of LWP LWPID within the target process PH | |
265 | from GREGSET. */ | |
266 | ||
267 | ps_err_e | |
268 | ps_lsetregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, const prgregset_t gregset) | |
269 | { | |
270 | struct cleanup *old_chain = save_inferior_pid (); | |
271 | ||
272 | inferior_pid = BUILD_LWP (lwpid, ph->pid); | |
273 | ||
274 | /* FIXME: We should really make supply_gregset const-correct. */ | |
275 | supply_gregset ((gdb_gregset_t *) gregset); | |
276 | target_store_registers (-1); | |
277 | ||
278 | do_cleanups (old_chain); | |
279 | return PS_OK; | |
280 | } | |
281 | ||
282 | /* Get the floating-point registers of LWP LWPID within the target | |
283 | process PH and store them in FPREGSET. */ | |
284 | ||
285 | ps_err_e | |
286 | ps_lgetfpregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, | |
287 | gdb_prfpregset_t *fpregset) | |
288 | { | |
289 | struct cleanup *old_chain = save_inferior_pid (); | |
290 | ||
291 | inferior_pid = BUILD_LWP (lwpid, ph->pid); | |
292 | ||
293 | target_fetch_registers (-1); | |
294 | fill_fpregset ((gdb_fpregset_t *) fpregset, -1); | |
295 | ||
296 | do_cleanups (old_chain); | |
297 | return PS_OK; | |
298 | } | |
299 | ||
300 | /* Set the floating-point registers of LWP LWPID within the target | |
301 | process PH from FPREGSET. */ | |
302 | ||
303 | ps_err_e | |
304 | ps_lsetfpregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, | |
305 | const gdb_prfpregset_t *fpregset) | |
306 | { | |
307 | struct cleanup *old_chain = save_inferior_pid (); | |
308 | ||
309 | inferior_pid = BUILD_LWP (lwpid, ph->pid); | |
310 | ||
311 | /* FIXME: We should really make supply_fpregset const-correct. */ | |
312 | supply_fpregset ((gdb_fpregset_t *) fpregset); | |
313 | target_store_registers (-1); | |
314 | ||
315 | do_cleanups (old_chain); | |
316 | return PS_OK; | |
317 | } | |
318 | ||
319 | /* Return overall process id of the target PH. | |
320 | Special for Linux -- not used on Solaris. */ | |
321 | ||
322 | pid_t | |
323 | ps_getpid (gdb_ps_prochandle_t ph) | |
324 | { | |
325 | return ph->pid; | |
326 | } | |
327 | ||
328 | void | |
329 | _initialize_proc_service (void) | |
330 | { | |
331 | /* This function solely exists to make sure this module is linked | |
332 | into the final binary. */ | |
333 | } |