gdb/gdbserver/proc-service.c - gdb

Data types defined

Functions defined

Macros defined

Source code

  1. /* libthread_db helper functions for the remote server for GDB.
  2.    Copyright (C) 2002-2015 Free Software Foundation, Inc.

  4.    Contributed by MontaVista Software.

  6.    This file is part of GDB.

  8.    This program is free software; you can redistribute it and/or modify
  9.    it under the terms of the GNU General Public License as published by
  10.    the Free Software Foundation; either version 3 of the License, or
  11.    (at your option) any later version.

  13.    This program is distributed in the hope that it will be useful,
  14.    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15.    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16.    GNU General Public License for more details.

  18.    You should have received a copy of the GNU General Public License
  19.    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

  21. #include "server.h"

  23. /* This file is currently tied to GNU/Linux.  It should scale well to
  24.    another libthread_db implementation, with the approriate gdbserver
  25.    hooks, but for now this means we can use GNU/Linux's target data.  */

  27. #include "linux-low.h"

  29. #include "gdb_proc_service.h"

  31. ‌typedef struct ps_prochandle *gdb_ps_prochandle_t;
  32. ‌typedef void *gdb_ps_read_buf_t;
  33. ‌typedef const void *gdb_ps_write_buf_t;
  34. ‌typedef size_t gdb_ps_size_t;

  36. #ifdef HAVE_LINUX_REGSETS
  37. ‌#define HAVE_REGSETS
  38. #endif

  40. #ifdef HAVE_REGSETS
  41. static struct regset_info *
  42. ‌gregset_info (void)
  43. {
  44.   int i = 0;
  45.   const struct regs_info *regs_info = (*the_low_target.regs_info) ();
  46.   struct regsets_info *regsets_info = regs_info->regsets_info;

  48.   while (regsets_info->regsets[i].size != -1)
  49.     {
  50.       if (regsets_info->regsets[i].type == GENERAL_REGS)
  51.         break;
  52.       i++;
  53.     }

  55.   return &regsets_info->regsets[i];
  56. }
  57. #endif

  59. /* Search for the symbol named NAME within the object named OBJ within
  60.    the target process PH.  If the symbol is found the address of the
  61.    symbol is stored in SYM_ADDR.  */

  63. ps_err_e
  64. ‌ps_pglobal_lookup (gdb_ps_prochandle_t ph, const char *obj,
  65.                    const char *name, psaddr_t *sym_addr)
  66. {
  67.   CORE_ADDR addr;

  69.   if (thread_db_look_up_one_symbol (name, &addr) == 0)
  70.     return PS_NOSYM;

  72.   *sym_addr = (psaddr_t) (unsigned long) addr;
  73.   return PS_OK;
  74. }

  76. /* Read SIZE bytes from the target process PH at address ADDR and copy
  77.    them into BUF.  */

  79. ps_err_e
  80. ‌ps_pdread (gdb_ps_prochandle_t ph, psaddr_t addr,
  81.            gdb_ps_read_buf_t buf, gdb_ps_size_t size)
  82. {
  83.   read_inferior_memory ((unsigned long) addr, buf, size);
  84.   return PS_OK;
  85. }

  87. /* Write SIZE bytes from BUF into the target process PH at address ADDR.  */

  89. ps_err_e
  90. ‌ps_pdwrite (gdb_ps_prochandle_t ph, psaddr_t addr,
  91.             gdb_ps_write_buf_t buf, gdb_ps_size_t size)
  92. {
  93.   return write_inferior_memory ((unsigned long) addr, buf, size);
  94. }

  96. /* Get the general registers of LWP LWPID within the target process PH
  97.    and store them in GREGSET.  */

  99. ps_err_e
  100. ‌ps_lgetregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, prgregset_t gregset)
  101. {
  102. #ifdef HAVE_REGSETS
  103.   struct lwp_info *lwp;
  104.   struct thread_info *reg_thread, *saved_thread;
  105.   struct regcache *regcache;

  107.   lwp = find_lwp_pid (pid_to_ptid (lwpid));
  108.   if (lwp == NULL)
  109.     return PS_ERR;

  111.   reg_thread = get_lwp_thread (lwp);
  112.   saved_thread = current_thread;
  113.   current_thread = reg_thread;
  114.   regcache = get_thread_regcache (current_thread, 1);
  115.   gregset_info ()->fill_function (regcache, gregset);

  117.   current_thread = saved_thread;
  118.   return PS_OK;
  119. #else
  120.   return PS_ERR;
  121. #endif
  122. }

  124. /* Set the general registers of LWP LWPID within the target process PH
  125.    from GREGSET.  */

  127. ps_err_e
  128. ‌ps_lsetregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, const prgregset_t gregset)
  129. {
  130.   /* Unneeded.  */
  131.   return PS_ERR;
  132. }

  134. /* Get the floating-point registers of LWP LWPID within the target
  135.    process PH and store them in FPREGSET.  */

  137. ps_err_e
  138. ‌ps_lgetfpregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, void *fpregset)
  139. {
  140.   /* Unneeded.  */
  141.   return PS_ERR;
  142. }

  144. /* Set the floating-point registers of LWP LWPID within the target
  145.    process PH from FPREGSET.  */

  147. ps_err_e
  148. ‌ps_lsetfpregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, void *fpregset)
  149. {
  150.   /* Unneeded.  */
  151.   return PS_ERR;
  152. }

  154. /* Return overall process id of the target PH.  Special for GNU/Linux
  155.    -- not used on Solaris.  */

  157. pid_t
  158. ‌ps_getpid (gdb_ps_prochandle_t ph)
  159. {
  160.   return pid_of (current_thread);
  161. }