gdb/proc-service.c

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