gdb/gdbserver/proc-service.c

   1 /* libthread_db helper functions for the remote server for GDB.
   2    Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008, 2009
   3    Free Software Foundation, Inc.
   4
   5    Contributed by MontaVista Software.
   6
   7    This file is part of GDB.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  21
  22 #include "server.h"
  23
  24 /* This file is currently tied to GNU/Linux.  It should scale well to
  25    another libthread_db implementation, with the approriate gdbserver
  26    hooks, but for now this means we can use GNU/Linux's target data.  */
  27
  28 #include "linux-low.h"
  29
  30 #include "gdb_proc_service.h"
  31
  32 typedef struct ps_prochandle *gdb_ps_prochandle_t;
  33 typedef void *gdb_ps_read_buf_t;
  34 typedef const void *gdb_ps_write_buf_t;
  35 typedef size_t gdb_ps_size_t;
  36
  37 #ifdef HAVE_LINUX_REGSETS
  38 #define HAVE_REGSETS
  39 #endif
  40
  41 #ifdef HAVE_REGSETS
  42 static struct regset_info *
  43 gregset_info(void)
  44 {
  45   int i = 0;
  46
  47   while (target_regsets[i].size != -1)
  48     {
  49       if (target_regsets[i].type == GENERAL_REGS)
  50         break;
  51       i++;
  52     }
  53
  54   return &target_regsets[i];
  55 }
  56 #endif
  57
  58 /* Search for the symbol named NAME within the object named OBJ within
  59    the target process PH.  If the symbol is found the address of the
  60    symbol is stored in SYM_ADDR.  */
  61
  62 ps_err_e
  63 ps_pglobal_lookup (gdb_ps_prochandle_t ph, const char *obj,
  64                    const char *name, psaddr_t *sym_addr)
  65 {
  66   CORE_ADDR addr;
  67
  68   if (look_up_one_symbol (name, &addr) == 0)
  69     return PS_NOSYM;
  70
  71   *sym_addr = (psaddr_t) (unsigned long) addr;
  72   return PS_OK;
  73 }
  74
  75 /* Read SIZE bytes from the target process PH at address ADDR and copy
  76    them into BUF.  */
  77
  78 ps_err_e
  79 ps_pdread (gdb_ps_prochandle_t ph, psaddr_t addr,
  80            gdb_ps_read_buf_t buf, gdb_ps_size_t size)
  81 {
  82   read_inferior_memory ((unsigned long) addr, buf, size);
  83   return PS_OK;
  84 }
  85
  86 /* Write SIZE bytes from BUF into the target process PH at address ADDR.  */
  87
  88 ps_err_e
  89 ps_pdwrite (gdb_ps_prochandle_t ph, psaddr_t addr,
  90             gdb_ps_write_buf_t buf, gdb_ps_size_t size)
  91 {
  92   return write_inferior_memory ((unsigned long) addr, buf, size);
  93 }
  94
  95 /* Get the general registers of LWP LWPID within the target process PH
  96    and store them in GREGSET.  */
  97
  98 ps_err_e
  99 ps_lgetregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, prgregset_t gregset)
 100 {
 101 #ifdef HAVE_REGSETS
 102   struct lwp_info *lwp;
 103   struct thread_info *reg_inferior, *save_inferior;
 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
 113   the_target->fetch_registers (0);
 114   gregset_info()->fill_function (gregset);
 115
 116   current_inferior = save_inferior;
 117   return PS_OK;
 118 #else
 119   return PS_ERR;
 120 #endif
 121 }
 122
 123 /* Set the general registers of LWP LWPID within the target process PH
 124    from GREGSET.  */
 125
 126 ps_err_e
 127 ps_lsetregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, const prgregset_t gregset)
 128 {
 129   /* Unneeded.  */
 130   return PS_ERR;
 131 }
 132
 133 /* Get the floating-point registers of LWP LWPID within the target
 134    process PH and store them in FPREGSET.  */
 135
 136 ps_err_e
 137 ps_lgetfpregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, void *fpregset)
 138 {
 139   /* Unneeded.  */
 140   return PS_ERR;
 141 }
 142
 143 /* Set the floating-point registers of LWP LWPID within the target
 144    process PH from FPREGSET.  */
 145
 146 ps_err_e
 147 ps_lsetfpregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, void *fpregset)
 148 {
 149   /* Unneeded.  */
 150   return PS_ERR;
 151 }
 152
 153 /* Return overall process id of the target PH.  Special for GNU/Linux
 154    -- not used on Solaris.  */
 155
 156 pid_t
 157 ps_getpid (gdb_ps_prochandle_t ph)
 158 {
 159   return pid_of (get_thread_lwp (current_inferior));
 160 }