| 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; |
| 68 | xfree (arg); |
| 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 | } |