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1 /* <proc_service.h> implementation.
2
3 Copyright (C) 1999, 2000, 2002, 2007 Free Software Foundation, Inc.
4
5 This file is part of GDB.
6
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
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
11
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.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street, Fifth Floor,
20 Boston, MA 02110-1301, USA. */
21
22 #include "defs.h"
23
24 #include "gdb_proc_service.h"
25 #include <sys/procfs.h>
26
27 #include "inferior.h"
28 #include "symtab.h"
29 #include "target.h"
30
31 /* Prototypes for supply_gregset etc. */
32 #include "gregset.h"
33 \f
34
35 /* Fix-up some broken systems. */
36
37 /* The prototypes in <proc_service.h> are slightly different on older
38 systems. Compensate for the discrepancies. */
39
40 #ifdef PROC_SERVICE_IS_OLD
41 typedef const struct ps_prochandle *gdb_ps_prochandle_t;
42 typedef char *gdb_ps_read_buf_t;
43 typedef char *gdb_ps_write_buf_t;
44 typedef int gdb_ps_size_t;
45 #else
46 typedef struct ps_prochandle *gdb_ps_prochandle_t;
47 typedef void *gdb_ps_read_buf_t;
48 typedef const void *gdb_ps_write_buf_t;
49 typedef size_t gdb_ps_size_t;
50 #endif
51 \f
52
53 /* Building process ids. */
54
55 #define BUILD_LWP(lwp, pid) ptid_build (pid, lwp, 0)
56 \f
57
58 /* Helper functions. */
59
60 /* Transfer LEN bytes of memory between BUF and address ADDR in the
61 process specified by PH. If WRITE, transfer them to the process,
62 else transfer them from the process. Returns PS_OK for success,
63 PS_ERR on failure.
64
65 This is a helper function for ps_pdread, ps_pdwrite, ps_ptread and
66 ps_ptwrite. */
67
68 static ps_err_e
69 ps_xfer_memory (const struct ps_prochandle *ph, paddr_t addr,
70 gdb_byte *buf, size_t len, int write)
71 {
72 struct cleanup *old_chain = save_inferior_ptid ();
73 int ret;
74
75 inferior_ptid = pid_to_ptid (ph->pid);
76
77 if (write)
78 ret = target_write_memory (addr, buf, len);
79 else
80 ret = target_read_memory (addr, buf, len);
81
82 do_cleanups (old_chain);
83
84 return (ret == 0 ? PS_OK : PS_ERR);
85 }
86 \f
87
88 /* Stop the target process PH. */
89
90 ps_err_e
91 ps_pstop (gdb_ps_prochandle_t ph)
92 {
93 /* The process is always stopped when under control of GDB. */
94 return PS_OK;
95 }
96
97 /* Resume the target process PH. */
98
99 ps_err_e
100 ps_pcontinue (gdb_ps_prochandle_t ph)
101 {
102 /* Pretend we did successfully continue the process. GDB will take
103 care of it later on. */
104 return PS_OK;
105 }
106
107 /* Stop the lightweight process LWPID within the target process PH. */
108
109 ps_err_e
110 ps_lstop (gdb_ps_prochandle_t ph, lwpid_t lwpid)
111 {
112 /* All lightweight processes are stopped when under control of GDB. */
113 return PS_OK;
114 }
115
116 /* Resume the lightweight process (LWP) LWPID within the target
117 process PH. */
118
119 ps_err_e
120 ps_lcontinue (gdb_ps_prochandle_t ph, lwpid_t lwpid)
121 {
122 /* Pretend we did successfully continue LWPID. GDB will take care
123 of it later on. */
124 return PS_OK;
125 }
126
127 /* Get the size of the architecture-dependent extra state registers
128 for LWP LWPID within the target process PH and return it in
129 *XREGSIZE. */
130
131 ps_err_e
132 ps_lgetxregsize (gdb_ps_prochandle_t ph, lwpid_t lwpid, int *xregsize)
133 {
134 /* FIXME: Not supported yet. */
135 return PS_OK;
136 }
137
138 /* Get the extra state registers of LWP LWPID within the target
139 process PH and store them in XREGSET. */
140
141 ps_err_e
142 ps_lgetxregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, caddr_t xregset)
143 {
144 /* FIXME: Not supported yet. */
145 return PS_OK;
146 }
147
148 /* Set the extra state registers of LWP LWPID within the target
149 process PH from XREGSET. */
150
151 ps_err_e
152 ps_lsetxregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, caddr_t xregset)
153 {
154 /* FIXME: Not supported yet. */
155 return PS_OK;
156 }
157
158 /* Log (additional) diognostic information. */
159
160 void
161 ps_plog (const char *fmt, ...)
162 {
163 va_list args;
164
165 va_start (args, fmt);
166 vfprintf_filtered (gdb_stderr, fmt, args);
167 }
168
169 /* Search for the symbol named NAME within the object named OBJ within
170 the target process PH. If the symbol is found the address of the
171 symbol is stored in SYM_ADDR. */
172
173 ps_err_e
174 ps_pglobal_lookup (gdb_ps_prochandle_t ph, const char *obj,
175 const char *name, paddr_t *sym_addr)
176 {
177 struct minimal_symbol *ms;
178
179 /* FIXME: kettenis/2000-09-03: What should we do with OBJ? */
180 ms = lookup_minimal_symbol (name, NULL, NULL);
181 if (ms == NULL)
182 return PS_NOSYM;
183
184 *sym_addr = SYMBOL_VALUE_ADDRESS (ms);
185 return PS_OK;
186 }
187
188 /* Read SIZE bytes from the target process PH at address ADDR and copy
189 them into BUF. */
190
191 ps_err_e
192 ps_pdread (gdb_ps_prochandle_t ph, paddr_t addr,
193 gdb_ps_read_buf_t buf, gdb_ps_size_t size)
194 {
195 return ps_xfer_memory (ph, addr, buf, size, 0);
196 }
197
198 /* Write SIZE bytes from BUF into the target process PH at address ADDR. */
199
200 ps_err_e
201 ps_pdwrite (gdb_ps_prochandle_t ph, paddr_t addr,
202 gdb_ps_write_buf_t buf, gdb_ps_size_t size)
203 {
204 return ps_xfer_memory (ph, addr, (gdb_byte *) buf, size, 1);
205 }
206
207 /* Read SIZE bytes from the target process PH at address ADDR and copy
208 them into BUF. */
209
210 ps_err_e
211 ps_ptread (gdb_ps_prochandle_t ph, paddr_t addr,
212 gdb_ps_read_buf_t buf, gdb_ps_size_t size)
213 {
214 return ps_xfer_memory (ph, addr, (gdb_byte *) buf, size, 0);
215 }
216
217 /* Write SIZE bytes from BUF into the target process PH at address ADDR. */
218
219 ps_err_e
220 ps_ptwrite (gdb_ps_prochandle_t ph, paddr_t addr,
221 gdb_ps_write_buf_t buf, gdb_ps_size_t size)
222 {
223 return ps_xfer_memory (ph, addr, (gdb_byte *) buf, size, 1);
224 }
225
226 /* Get the general registers of LWP LWPID within the target process PH
227 and store them in GREGSET. */
228
229 ps_err_e
230 ps_lgetregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, prgregset_t gregset)
231 {
232 struct cleanup *old_chain = save_inferior_ptid ();
233
234 inferior_ptid = BUILD_LWP (lwpid, ph->pid);
235
236 target_fetch_registers (-1);
237 fill_gregset ((gdb_gregset_t *) gregset, -1);
238
239 do_cleanups (old_chain);
240 return PS_OK;
241 }
242
243 /* Set the general registers of LWP LWPID within the target process PH
244 from GREGSET. */
245
246 ps_err_e
247 ps_lsetregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, const prgregset_t gregset)
248 {
249 struct cleanup *old_chain = save_inferior_ptid ();
250
251 inferior_ptid = BUILD_LWP (lwpid, ph->pid);
252
253 /* FIXME: We should really make supply_gregset const-correct. */
254 supply_gregset ((gdb_gregset_t *) gregset);
255 target_store_registers (-1);
256
257 do_cleanups (old_chain);
258 return PS_OK;
259 }
260
261 /* Get the floating-point registers of LWP LWPID within the target
262 process PH and store them in FPREGSET. */
263
264 ps_err_e
265 ps_lgetfpregs (gdb_ps_prochandle_t ph, lwpid_t lwpid,
266 gdb_prfpregset_t *fpregset)
267 {
268 struct cleanup *old_chain = save_inferior_ptid ();
269
270 inferior_ptid = BUILD_LWP (lwpid, ph->pid);
271
272 target_fetch_registers (-1);
273 fill_fpregset ((gdb_fpregset_t *) fpregset, -1);
274
275 do_cleanups (old_chain);
276 return PS_OK;
277 }
278
279 /* Set the floating-point registers of LWP LWPID within the target
280 process PH from FPREGSET. */
281
282 ps_err_e
283 ps_lsetfpregs (gdb_ps_prochandle_t ph, lwpid_t lwpid,
284 const gdb_prfpregset_t *fpregset)
285 {
286 struct cleanup *old_chain = save_inferior_ptid ();
287
288 inferior_ptid = BUILD_LWP (lwpid, ph->pid);
289
290 /* FIXME: We should really make supply_fpregset const-correct. */
291 supply_fpregset ((gdb_fpregset_t *) fpregset);
292 target_store_registers (-1);
293
294 do_cleanups (old_chain);
295 return PS_OK;
296 }
297
298 /* Return overall process id of the target PH. Special for GNU/Linux
299 -- not used on Solaris. */
300
301 pid_t
302 ps_getpid (gdb_ps_prochandle_t ph)
303 {
304 return ph->pid;
305 }
306
307 void
308 _initialize_proc_service (void)
309 {
310 /* This function solely exists to make sure this module is linked
311 into the final binary. */
312 }