| 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 "gdbcore.h" |
| 25 | #include "inferior.h" |
| 26 | #include "symtab.h" |
| 27 | #include "target.h" |
| 28 | #include "regcache.h" |
| 29 | |
| 30 | #include "gdb_proc_service.h" |
| 31 | #include "gdb_stdint.h" |
| 32 | |
| 33 | #include <sys/procfs.h> |
| 34 | |
| 35 | /* Prototypes for supply_gregset etc. */ |
| 36 | #include "gregset.h" |
| 37 | \f |
| 38 | |
| 39 | /* Fix-up some broken systems. */ |
| 40 | |
| 41 | /* The prototypes in <proc_service.h> are slightly different on older |
| 42 | systems. Compensate for the discrepancies. */ |
| 43 | |
| 44 | #ifdef PROC_SERVICE_IS_OLD |
| 45 | typedef const struct ps_prochandle *gdb_ps_prochandle_t; |
| 46 | typedef char *gdb_ps_read_buf_t; |
| 47 | typedef char *gdb_ps_write_buf_t; |
| 48 | typedef int gdb_ps_size_t; |
| 49 | #else |
| 50 | typedef struct ps_prochandle *gdb_ps_prochandle_t; |
| 51 | typedef void *gdb_ps_read_buf_t; |
| 52 | typedef const void *gdb_ps_write_buf_t; |
| 53 | typedef size_t gdb_ps_size_t; |
| 54 | #endif |
| 55 | \f |
| 56 | |
| 57 | /* Building process ids. */ |
| 58 | |
| 59 | #define BUILD_LWP(lwp, pid) ptid_build (pid, lwp, 0) |
| 60 | \f |
| 61 | |
| 62 | /* Helper functions. */ |
| 63 | |
| 64 | /* Convert a psaddr_t to a CORE_ADDR. */ |
| 65 | |
| 66 | static CORE_ADDR |
| 67 | ps_addr_to_core_addr (psaddr_t addr) |
| 68 | { |
| 69 | if (exec_bfd && bfd_get_sign_extend_vma (exec_bfd)) |
| 70 | return (intptr_t) addr; |
| 71 | else |
| 72 | return (uintptr_t) addr; |
| 73 | } |
| 74 | |
| 75 | /* Convert a CORE_ADDR to a psaddr_t. */ |
| 76 | |
| 77 | static psaddr_t |
| 78 | core_addr_to_ps_addr (CORE_ADDR addr) |
| 79 | { |
| 80 | if (exec_bfd && bfd_get_sign_extend_vma (exec_bfd)) |
| 81 | return (psaddr_t) (intptr_t) addr; |
| 82 | else |
| 83 | return (psaddr_t) (uintptr_t) addr; |
| 84 | } |
| 85 | |
| 86 | /* Transfer LEN bytes of memory between BUF and address ADDR in the |
| 87 | process specified by PH. If WRITE, transfer them to the process, |
| 88 | else transfer them from the process. Returns PS_OK for success, |
| 89 | PS_ERR on failure. |
| 90 | |
| 91 | This is a helper function for ps_pdread, ps_pdwrite, ps_ptread and |
| 92 | ps_ptwrite. */ |
| 93 | |
| 94 | static ps_err_e |
| 95 | ps_xfer_memory (const struct ps_prochandle *ph, psaddr_t addr, |
| 96 | gdb_byte *buf, size_t len, int write) |
| 97 | { |
| 98 | struct cleanup *old_chain = save_inferior_ptid (); |
| 99 | int ret; |
| 100 | CORE_ADDR core_addr = ps_addr_to_core_addr (addr); |
| 101 | |
| 102 | inferior_ptid = pid_to_ptid (ph->pid); |
| 103 | |
| 104 | if (write) |
| 105 | ret = target_write_memory (core_addr, buf, len); |
| 106 | else |
| 107 | ret = target_read_memory (core_addr, buf, len); |
| 108 | |
| 109 | do_cleanups (old_chain); |
| 110 | |
| 111 | return (ret == 0 ? PS_OK : PS_ERR); |
| 112 | } |
| 113 | \f |
| 114 | |
| 115 | /* Stop the target process PH. */ |
| 116 | |
| 117 | ps_err_e |
| 118 | ps_pstop (gdb_ps_prochandle_t ph) |
| 119 | { |
| 120 | /* The process is always stopped when under control of GDB. */ |
| 121 | return PS_OK; |
| 122 | } |
| 123 | |
| 124 | /* Resume the target process PH. */ |
| 125 | |
| 126 | ps_err_e |
| 127 | ps_pcontinue (gdb_ps_prochandle_t ph) |
| 128 | { |
| 129 | /* Pretend we did successfully continue the process. GDB will take |
| 130 | care of it later on. */ |
| 131 | return PS_OK; |
| 132 | } |
| 133 | |
| 134 | /* Stop the lightweight process LWPID within the target process PH. */ |
| 135 | |
| 136 | ps_err_e |
| 137 | ps_lstop (gdb_ps_prochandle_t ph, lwpid_t lwpid) |
| 138 | { |
| 139 | /* All lightweight processes are stopped when under control of GDB. */ |
| 140 | return PS_OK; |
| 141 | } |
| 142 | |
| 143 | /* Resume the lightweight process (LWP) LWPID within the target |
| 144 | process PH. */ |
| 145 | |
| 146 | ps_err_e |
| 147 | ps_lcontinue (gdb_ps_prochandle_t ph, lwpid_t lwpid) |
| 148 | { |
| 149 | /* Pretend we did successfully continue LWPID. GDB will take care |
| 150 | of it later on. */ |
| 151 | return PS_OK; |
| 152 | } |
| 153 | |
| 154 | /* Get the size of the architecture-dependent extra state registers |
| 155 | for LWP LWPID within the target process PH and return it in |
| 156 | *XREGSIZE. */ |
| 157 | |
| 158 | ps_err_e |
| 159 | ps_lgetxregsize (gdb_ps_prochandle_t ph, lwpid_t lwpid, int *xregsize) |
| 160 | { |
| 161 | /* FIXME: Not supported yet. */ |
| 162 | return PS_OK; |
| 163 | } |
| 164 | |
| 165 | /* Get the extra state registers of LWP LWPID within the target |
| 166 | process PH and store them in XREGSET. */ |
| 167 | |
| 168 | ps_err_e |
| 169 | ps_lgetxregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, caddr_t xregset) |
| 170 | { |
| 171 | /* FIXME: Not supported yet. */ |
| 172 | return PS_OK; |
| 173 | } |
| 174 | |
| 175 | /* Set the extra state registers of LWP LWPID within the target |
| 176 | process PH from XREGSET. */ |
| 177 | |
| 178 | ps_err_e |
| 179 | ps_lsetxregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, caddr_t xregset) |
| 180 | { |
| 181 | /* FIXME: Not supported yet. */ |
| 182 | return PS_OK; |
| 183 | } |
| 184 | |
| 185 | /* Log (additional) diognostic information. */ |
| 186 | |
| 187 | void |
| 188 | ps_plog (const char *fmt, ...) |
| 189 | { |
| 190 | va_list args; |
| 191 | |
| 192 | va_start (args, fmt); |
| 193 | vfprintf_filtered (gdb_stderr, fmt, args); |
| 194 | } |
| 195 | |
| 196 | /* Search for the symbol named NAME within the object named OBJ within |
| 197 | the target process PH. If the symbol is found the address of the |
| 198 | symbol is stored in SYM_ADDR. */ |
| 199 | |
| 200 | ps_err_e |
| 201 | ps_pglobal_lookup (gdb_ps_prochandle_t ph, const char *obj, |
| 202 | const char *name, psaddr_t *sym_addr) |
| 203 | { |
| 204 | struct minimal_symbol *ms; |
| 205 | |
| 206 | /* FIXME: kettenis/2000-09-03: What should we do with OBJ? */ |
| 207 | ms = lookup_minimal_symbol (name, NULL, NULL); |
| 208 | if (ms == NULL) |
| 209 | return PS_NOSYM; |
| 210 | |
| 211 | *sym_addr = core_addr_to_ps_addr (SYMBOL_VALUE_ADDRESS (ms)); |
| 212 | return PS_OK; |
| 213 | } |
| 214 | |
| 215 | /* Read SIZE bytes from the target process PH at address ADDR and copy |
| 216 | them into BUF. */ |
| 217 | |
| 218 | ps_err_e |
| 219 | ps_pdread (gdb_ps_prochandle_t ph, psaddr_t addr, |
| 220 | gdb_ps_read_buf_t buf, gdb_ps_size_t size) |
| 221 | { |
| 222 | return ps_xfer_memory (ph, addr, buf, size, 0); |
| 223 | } |
| 224 | |
| 225 | /* Write SIZE bytes from BUF into the target process PH at address ADDR. */ |
| 226 | |
| 227 | ps_err_e |
| 228 | ps_pdwrite (gdb_ps_prochandle_t ph, psaddr_t addr, |
| 229 | gdb_ps_write_buf_t buf, gdb_ps_size_t size) |
| 230 | { |
| 231 | return ps_xfer_memory (ph, addr, (gdb_byte *) buf, size, 1); |
| 232 | } |
| 233 | |
| 234 | /* Read SIZE bytes from the target process PH at address ADDR and copy |
| 235 | them into BUF. */ |
| 236 | |
| 237 | ps_err_e |
| 238 | ps_ptread (gdb_ps_prochandle_t ph, psaddr_t addr, |
| 239 | gdb_ps_read_buf_t buf, gdb_ps_size_t size) |
| 240 | { |
| 241 | return ps_xfer_memory (ph, addr, (gdb_byte *) buf, size, 0); |
| 242 | } |
| 243 | |
| 244 | /* Write SIZE bytes from BUF into the target process PH at address ADDR. */ |
| 245 | |
| 246 | ps_err_e |
| 247 | ps_ptwrite (gdb_ps_prochandle_t ph, psaddr_t addr, |
| 248 | gdb_ps_write_buf_t buf, gdb_ps_size_t size) |
| 249 | { |
| 250 | return ps_xfer_memory (ph, addr, (gdb_byte *) buf, size, 1); |
| 251 | } |
| 252 | |
| 253 | /* Get the general registers of LWP LWPID within the target process PH |
| 254 | and store them in GREGSET. */ |
| 255 | |
| 256 | ps_err_e |
| 257 | ps_lgetregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, prgregset_t gregset) |
| 258 | { |
| 259 | struct cleanup *old_chain = save_inferior_ptid (); |
| 260 | |
| 261 | inferior_ptid = BUILD_LWP (lwpid, ph->pid); |
| 262 | |
| 263 | target_fetch_registers (current_regcache, -1); |
| 264 | fill_gregset (current_regcache, (gdb_gregset_t *) gregset, -1); |
| 265 | |
| 266 | do_cleanups (old_chain); |
| 267 | return PS_OK; |
| 268 | } |
| 269 | |
| 270 | /* Set the general registers of LWP LWPID within the target process PH |
| 271 | from GREGSET. */ |
| 272 | |
| 273 | ps_err_e |
| 274 | ps_lsetregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, const prgregset_t gregset) |
| 275 | { |
| 276 | struct cleanup *old_chain = save_inferior_ptid (); |
| 277 | |
| 278 | inferior_ptid = BUILD_LWP (lwpid, ph->pid); |
| 279 | |
| 280 | supply_gregset (current_regcache, (const gdb_gregset_t *) gregset); |
| 281 | target_store_registers (current_regcache, -1); |
| 282 | |
| 283 | do_cleanups (old_chain); |
| 284 | return PS_OK; |
| 285 | } |
| 286 | |
| 287 | /* Get the floating-point registers of LWP LWPID within the target |
| 288 | process PH and store them in FPREGSET. */ |
| 289 | |
| 290 | ps_err_e |
| 291 | ps_lgetfpregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, |
| 292 | gdb_prfpregset_t *fpregset) |
| 293 | { |
| 294 | struct cleanup *old_chain = save_inferior_ptid (); |
| 295 | |
| 296 | inferior_ptid = BUILD_LWP (lwpid, ph->pid); |
| 297 | |
| 298 | target_fetch_registers (current_regcache, -1); |
| 299 | fill_fpregset (current_regcache, (gdb_fpregset_t *) fpregset, -1); |
| 300 | |
| 301 | do_cleanups (old_chain); |
| 302 | return PS_OK; |
| 303 | } |
| 304 | |
| 305 | /* Set the floating-point registers of LWP LWPID within the target |
| 306 | process PH from FPREGSET. */ |
| 307 | |
| 308 | ps_err_e |
| 309 | ps_lsetfpregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, |
| 310 | const gdb_prfpregset_t *fpregset) |
| 311 | { |
| 312 | struct cleanup *old_chain = save_inferior_ptid (); |
| 313 | |
| 314 | inferior_ptid = BUILD_LWP (lwpid, ph->pid); |
| 315 | |
| 316 | supply_fpregset (current_regcache, (const gdb_fpregset_t *) fpregset); |
| 317 | target_store_registers (current_regcache, -1); |
| 318 | |
| 319 | do_cleanups (old_chain); |
| 320 | return PS_OK; |
| 321 | } |
| 322 | |
| 323 | /* Return overall process id of the target PH. Special for GNU/Linux |
| 324 | -- not used on Solaris. */ |
| 325 | |
| 326 | pid_t |
| 327 | ps_getpid (gdb_ps_prochandle_t ph) |
| 328 | { |
| 329 | return ph->pid; |
| 330 | } |
| 331 | |
| 332 | void |
| 333 | _initialize_proc_service (void) |
| 334 | { |
| 335 | /* This function solely exists to make sure this module is linked |
| 336 | into the final binary. */ |
| 337 | } |