gdb/proc-service.c

   1 /* <proc_service.h> implementation.
   2
   3    Copyright (C) 1999-2014 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 3 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, see <http://www.gnu.org/licenses/>.  */
  19
  20 #include "defs.h"
  21
  22 #include "gdbcore.h"
  23 #include "inferior.h"
  24 #include "symtab.h"
  25 #include "target.h"
  26 #include "regcache.h"
  27 #include "objfiles.h"
  28
  29 #include "gdb_proc_service.h"
  30
  31 #include <sys/procfs.h>
  32
  33 /* Prototypes for supply_gregset etc.  */
  34 #include "gregset.h"
  35 \f
  36
  37 /* Fix-up some broken systems.  */
  38
  39 /* The prototypes in <proc_service.h> are slightly different on older
  40    systems.  Compensate for the discrepancies.  */
  41
  42 #ifdef PROC_SERVICE_IS_OLD
  43 typedef const struct ps_prochandle *gdb_ps_prochandle_t;
  44 typedef char *gdb_ps_read_buf_t;
  45 typedef char *gdb_ps_write_buf_t;
  46 typedef int gdb_ps_size_t;
  47 #else
  48 typedef struct ps_prochandle *gdb_ps_prochandle_t;
  49 typedef void *gdb_ps_read_buf_t;
  50 typedef const void *gdb_ps_write_buf_t;
  51 typedef size_t gdb_ps_size_t;
  52 #endif
  53 \f
  54
  55 /* Helper functions.  */
  56
  57 /* Convert a psaddr_t to a CORE_ADDR.  */
  58
  59 static CORE_ADDR
  60 ps_addr_to_core_addr (psaddr_t addr)
  61 {
  62   if (exec_bfd && bfd_get_sign_extend_vma (exec_bfd))
  63     return (intptr_t) addr;
  64   else
  65     return (uintptr_t) addr;
  66 }
  67
  68 /* Convert a CORE_ADDR to a psaddr_t.  */
  69
  70 static psaddr_t
  71 core_addr_to_ps_addr (CORE_ADDR addr)
  72 {
  73   if (exec_bfd && bfd_get_sign_extend_vma (exec_bfd))
  74     return (psaddr_t) (intptr_t) addr;
  75   else
  76     return (psaddr_t) (uintptr_t) addr;
  77 }
  78
  79 /* Transfer LEN bytes of memory between BUF and address ADDR in the
  80    process specified by PH.  If WRITE, transfer them to the process,
  81    else transfer them from the process.  Returns PS_OK for success,
  82    PS_ERR on failure.
  83
  84    This is a helper function for ps_pdread, ps_pdwrite, ps_ptread and
  85    ps_ptwrite.  */
  86
  87 static ps_err_e
  88 ps_xfer_memory (const struct ps_prochandle *ph, psaddr_t addr,
  89                 gdb_byte *buf, size_t len, int write)
  90 {
  91   struct cleanup *old_chain = save_inferior_ptid ();
  92   int ret;
  93   CORE_ADDR core_addr = ps_addr_to_core_addr (addr);
  94
  95   inferior_ptid = ph->ptid;
  96
  97   if (write)
  98     ret = target_write_memory (core_addr, buf, len);
  99   else
 100     ret = target_read_memory (core_addr, buf, len);
 101
 102   do_cleanups (old_chain);
 103
 104   return (ret == 0 ? PS_OK : PS_ERR);
 105 }
 106 \f
 107
 108 /* Stop the target process PH.  */
 109
 110 ps_err_e
 111 ps_pstop (gdb_ps_prochandle_t ph)
 112 {
 113   /* The process is always stopped when under control of GDB.  */
 114   return PS_OK;
 115 }
 116
 117 /* Resume the target process PH.  */
 118
 119 ps_err_e
 120 ps_pcontinue (gdb_ps_prochandle_t ph)
 121 {
 122   /* Pretend we did successfully continue the process.  GDB will take
 123      care of it later on.  */
 124   return PS_OK;
 125 }
 126
 127 /* Stop the lightweight process LWPID within the target process PH.  */
 128
 129 ps_err_e
 130 ps_lstop (gdb_ps_prochandle_t ph, lwpid_t lwpid)
 131 {
 132   /* All lightweight processes are stopped when under control of GDB.  */
 133   return PS_OK;
 134 }
 135
 136 /* Resume the lightweight process (LWP) LWPID within the target
 137    process PH.  */
 138
 139 ps_err_e
 140 ps_lcontinue (gdb_ps_prochandle_t ph, lwpid_t lwpid)
 141 {
 142   /* Pretend we did successfully continue LWPID.  GDB will take care
 143      of it later on.  */
 144   return PS_OK;
 145 }
 146
 147 /* Get the size of the architecture-dependent extra state registers
 148    for LWP LWPID within the target process PH and return it in
 149    *XREGSIZE.  */
 150
 151 ps_err_e
 152 ps_lgetxregsize (gdb_ps_prochandle_t ph, lwpid_t lwpid, int *xregsize)
 153 {
 154   /* FIXME: Not supported yet.  */
 155   return PS_OK;
 156 }
 157
 158 /* Get the extra state registers of LWP LWPID within the target
 159    process PH and store them in XREGSET.  */
 160
 161 ps_err_e
 162 ps_lgetxregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, caddr_t xregset)
 163 {
 164   /* FIXME: Not supported yet.  */
 165   return PS_OK;
 166 }
 167
 168 /* Set the extra state registers of LWP LWPID within the target
 169    process PH from XREGSET.  */
 170
 171 ps_err_e
 172 ps_lsetxregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, caddr_t xregset)
 173 {
 174   /* FIXME: Not supported yet.  */
 175   return PS_OK;
 176 }
 177
 178 /* Log (additional) diognostic information.  */
 179
 180 void
 181 ps_plog (const char *fmt, ...)
 182 {
 183   va_list args;
 184
 185   va_start (args, fmt);
 186   vfprintf_filtered (gdb_stderr, fmt, args);
 187   va_end (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, psaddr_t *sym_addr)
 197 {
 198   struct bound_minimal_symbol ms;
 199   struct cleanup *old_chain = save_current_program_space ();
 200   struct inferior *inf = find_inferior_pid (ptid_get_pid (ph->ptid));
 201   ps_err_e result;
 202
 203   set_current_program_space (inf->pspace);
 204
 205   /* FIXME: kettenis/2000-09-03: What should we do with OBJ?  */
 206   ms = lookup_minimal_symbol (name, NULL, NULL);
 207   if (ms.minsym == NULL)
 208     result = PS_NOSYM;
 209   else
 210     {
 211       *sym_addr = core_addr_to_ps_addr (BMSYMBOL_VALUE_ADDRESS (ms));
 212       result = PS_OK;
 213     }
 214
 215   do_cleanups (old_chain);
 216   return result;
 217 }
 218
 219 /* Read SIZE bytes from the target process PH at address ADDR and copy
 220    them into BUF.  */
 221
 222 ps_err_e
 223 ps_pdread (gdb_ps_prochandle_t ph, psaddr_t addr,
 224            gdb_ps_read_buf_t buf, gdb_ps_size_t size)
 225 {
 226   return ps_xfer_memory (ph, addr, buf, size, 0);
 227 }
 228
 229 /* Write SIZE bytes from BUF into the target process PH at address ADDR.  */
 230
 231 ps_err_e
 232 ps_pdwrite (gdb_ps_prochandle_t ph, psaddr_t addr,
 233             gdb_ps_write_buf_t buf, gdb_ps_size_t size)
 234 {
 235   return ps_xfer_memory (ph, addr, (gdb_byte *) buf, size, 1);
 236 }
 237
 238 /* Read SIZE bytes from the target process PH at address ADDR and copy
 239    them into BUF.  */
 240
 241 ps_err_e
 242 ps_ptread (gdb_ps_prochandle_t ph, psaddr_t addr,
 243            gdb_ps_read_buf_t buf, gdb_ps_size_t size)
 244 {
 245   return ps_xfer_memory (ph, addr, (gdb_byte *) buf, size, 0);
 246 }
 247
 248 /* Write SIZE bytes from BUF into the target process PH at address ADDR.  */
 249
 250 ps_err_e
 251 ps_ptwrite (gdb_ps_prochandle_t ph, psaddr_t addr,
 252             gdb_ps_write_buf_t buf, gdb_ps_size_t size)
 253 {
 254   return ps_xfer_memory (ph, addr, (gdb_byte *) buf, size, 1);
 255 }
 256
 257 /* Get the general registers of LWP LWPID within the target process PH
 258    and store them in GREGSET.  */
 259
 260 ps_err_e
 261 ps_lgetregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, prgregset_t gregset)
 262 {
 263   struct cleanup *old_chain = save_inferior_ptid ();
 264   struct regcache *regcache;
 265
 266   inferior_ptid = ptid_build (ptid_get_pid (ph->ptid), lwpid, 0);
 267   regcache = get_thread_arch_regcache (inferior_ptid, target_gdbarch ());
 268
 269   target_fetch_registers (regcache, -1);
 270   fill_gregset (regcache, (gdb_gregset_t *) gregset, -1);
 271
 272   do_cleanups (old_chain);
 273   return PS_OK;
 274 }
 275
 276 /* Set the general registers of LWP LWPID within the target process PH
 277    from GREGSET.  */
 278
 279 ps_err_e
 280 ps_lsetregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, const prgregset_t gregset)
 281 {
 282   struct cleanup *old_chain = save_inferior_ptid ();
 283   struct regcache *regcache;
 284
 285   inferior_ptid = ptid_build (ptid_get_pid (ph->ptid), lwpid, 0);
 286   regcache = get_thread_arch_regcache (inferior_ptid, target_gdbarch ());
 287
 288   supply_gregset (regcache, (const gdb_gregset_t *) gregset);
 289   target_store_registers (regcache, -1);
 290
 291   do_cleanups (old_chain);
 292   return PS_OK;
 293 }
 294
 295 /* Get the floating-point registers of LWP LWPID within the target
 296    process PH and store them in FPREGSET.  */
 297
 298 ps_err_e
 299 ps_lgetfpregs (gdb_ps_prochandle_t ph, lwpid_t lwpid,
 300                gdb_prfpregset_t *fpregset)
 301 {
 302   struct cleanup *old_chain = save_inferior_ptid ();
 303   struct regcache *regcache;
 304
 305   inferior_ptid = ptid_build (ptid_get_pid (ph->ptid), lwpid, 0);
 306   regcache = get_thread_arch_regcache (inferior_ptid, target_gdbarch ());
 307
 308   target_fetch_registers (regcache, -1);
 309   fill_fpregset (regcache, (gdb_fpregset_t *) fpregset, -1);
 310
 311   do_cleanups (old_chain);
 312   return PS_OK;
 313 }
 314
 315 /* Set the floating-point registers of LWP LWPID within the target
 316    process PH from FPREGSET.  */
 317
 318 ps_err_e
 319 ps_lsetfpregs (gdb_ps_prochandle_t ph, lwpid_t lwpid,
 320                const gdb_prfpregset_t *fpregset)
 321 {
 322   struct cleanup *old_chain = save_inferior_ptid ();
 323   struct regcache *regcache;
 324
 325   inferior_ptid = ptid_build (ptid_get_pid (ph->ptid), lwpid, 0);
 326   regcache = get_thread_arch_regcache (inferior_ptid, target_gdbarch ());
 327
 328   supply_fpregset (regcache, (const gdb_fpregset_t *) fpregset);
 329   target_store_registers (regcache, -1);
 330
 331   do_cleanups (old_chain);
 332   return PS_OK;
 333 }
 334
 335 /* Return overall process id of the target PH.  Special for GNU/Linux
 336    -- not used on Solaris.  */
 337
 338 pid_t
 339 ps_getpid (gdb_ps_prochandle_t ph)
 340 {
 341   return ptid_get_pid (ph->ptid);
 342 }
 343
 344 /* Provide a prototype to silence -Wmissing-prototypes.  */
 345 extern initialize_file_ftype _initialize_proc_service;
 346
 347 void
 348 _initialize_proc_service (void)
 349 {
 350   /* This function solely exists to make sure this module is linked
 351      into the final binary.  */
 352 }