gdb/gdbserver/proc-service.c

   1 /* libthread_db helper functions for the remote server for GDB.
   2    Copyright (C) 2002-2013 Free Software Foundation, Inc.
   3
   4    Contributed by MontaVista Software.
   5
   6    This file is part of GDB.
   7
   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.
  12
  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.
  17
  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/>.  */
  20
  21 #include "server.h"
  22
  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.  */
  26
  27 #include "linux-low.h"
  28
  29 #include "gdb_proc_service.h"
  30
  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;
  35
  36 #ifdef HAVE_LINUX_REGSETS
  37 #define HAVE_REGSETS
  38 #endif
  39
  40 #ifdef HAVE_REGSETS
  41 static struct regset_info *
  42 gregset_info(void)
  43 {
  44   int i = 0;
  45
  46   while (target_regsets[i].size != -1)
  47     {
  48       if (target_regsets[i].type == GENERAL_REGS)
  49         break;
  50       i++;
  51     }
  52
  53   return &target_regsets[i];
  54 }
  55 #endif
  56
  57 /* Search for the symbol named NAME within the object named OBJ within
  58    the target process PH.  If the symbol is found the address of the
  59    symbol is stored in SYM_ADDR.  */
  60
  61 ps_err_e
  62 ps_pglobal_lookup (gdb_ps_prochandle_t ph, const char *obj,
  63                    const char *name, psaddr_t *sym_addr)
  64 {
  65   CORE_ADDR addr;
  66
  67   if (thread_db_look_up_one_symbol (name, &addr) == 0)
  68     return PS_NOSYM;
  69
  70   *sym_addr = (psaddr_t) (unsigned long) addr;
  71   return PS_OK;
  72 }
  73
  74 /* Read SIZE bytes from the target process PH at address ADDR and copy
  75    them into BUF.  */
  76
  77 ps_err_e
  78 ps_pdread (gdb_ps_prochandle_t ph, psaddr_t addr,
  79            gdb_ps_read_buf_t buf, gdb_ps_size_t size)
  80 {
  81   read_inferior_memory ((unsigned long) addr, buf, size);
  82   return PS_OK;
  83 }
  84
  85 /* Write SIZE bytes from BUF into the target process PH at address ADDR.  */
  86
  87 ps_err_e
  88 ps_pdwrite (gdb_ps_prochandle_t ph, psaddr_t addr,
  89             gdb_ps_write_buf_t buf, gdb_ps_size_t size)
  90 {
  91   return write_inferior_memory ((unsigned long) addr, buf, size);
  92 }
  93
  94 /* Get the general registers of LWP LWPID within the target process PH
  95    and store them in GREGSET.  */
  96
  97 ps_err_e
  98 ps_lgetregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, prgregset_t gregset)
  99 {
 100 #ifdef HAVE_REGSETS
 101   struct lwp_info *lwp;
 102   struct thread_info *reg_inferior, *save_inferior;
 103   struct regcache *regcache;
 104
 105   lwp = find_lwp_pid (pid_to_ptid (lwpid));
 106   if (lwp == NULL)
 107     return PS_ERR;
 108
 109   reg_inferior = get_lwp_thread (lwp);
 110   save_inferior = current_inferior;
 111   current_inferior = reg_inferior;
 112   regcache = get_thread_regcache (current_inferior, 1);
 113   gregset_info ()->fill_function (regcache, gregset);
 114
 115   current_inferior = save_inferior;
 116   return PS_OK;
 117 #else
 118   return PS_ERR;
 119 #endif
 120 }
 121
 122 /* Set the general registers of LWP LWPID within the target process PH
 123    from GREGSET.  */
 124
 125 ps_err_e
 126 ps_lsetregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, const prgregset_t gregset)
 127 {
 128   /* Unneeded.  */
 129   return PS_ERR;
 130 }
 131
 132 /* Get the floating-point registers of LWP LWPID within the target
 133    process PH and store them in FPREGSET.  */
 134
 135 ps_err_e
 136 ps_lgetfpregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, void *fpregset)
 137 {
 138   /* Unneeded.  */
 139   return PS_ERR;
 140 }
 141
 142 /* Set the floating-point registers of LWP LWPID within the target
 143    process PH from FPREGSET.  */
 144
 145 ps_err_e
 146 ps_lsetfpregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, void *fpregset)
 147 {
 148   /* Unneeded.  */
 149   return PS_ERR;
 150 }
 151
 152 /* Return overall process id of the target PH.  Special for GNU/Linux
 153    -- not used on Solaris.  */
 154
 155 pid_t
 156 ps_getpid (gdb_ps_prochandle_t ph)
 157 {
 158   return pid_of (get_thread_lwp (current_inferior));
 159 }