gdb/gdbserver/proc-service.c

   1 /* libthread_db helper functions for the remote server for GDB.
   2    Copyright 2002, 2004, 2005
   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 2 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, write to the Free Software
  21    Foundation, Inc., 59 Temple Place - Suite 330,
  22    Boston, MA 02111-1307, USA.  */
  23
  24 #include "server.h"
  25
  26 /* This file is currently tied to GNU/Linux.  It should scale well to
  27    another libthread_db implementation, with the approriate gdbserver
  28    hooks, but for now this means we can use GNU/Linux's target data.  */
  29
  30 #include "linux-low.h"
  31
  32 /* Correct for all GNU/Linux targets (for quite some time).  */
  33 #define GDB_GREGSET_T elf_gregset_t
  34 #define GDB_FPREGSET_T elf_fpregset_t
  35
  36 #ifndef HAVE_ELF_FPREGSET_T
  37 /* Make sure we have said types.  Not all platforms bring in <linux/elf.h>
  38    via <sys/procfs.h>.  */
  39 #ifdef HAVE_LINUX_ELF_H
  40 #include <linux/elf.h>
  41 #endif
  42 #endif
  43
  44 #include "../gdb_proc_service.h"
  45
  46 typedef struct ps_prochandle *gdb_ps_prochandle_t;
  47 typedef void *gdb_ps_read_buf_t;
  48 typedef const void *gdb_ps_write_buf_t;
  49 typedef size_t gdb_ps_size_t;
  50
  51 #ifdef HAVE_LINUX_REGSETS
  52 #define HAVE_REGSETS
  53 #endif
  54
  55 #ifdef HAVE_REGSETS
  56 static struct regset_info *
  57 gregset_info(void)
  58 {
  59   int i = 0;
  60
  61   while (target_regsets[i].size != -1)
  62     {
  63       if (target_regsets[i].type == GENERAL_REGS)
  64         break;
  65       i++;
  66     }
  67
  68   return &target_regsets[i];
  69 }
  70 #endif
  71
  72 /* Search for the symbol named NAME within the object named OBJ within
  73    the target process PH.  If the symbol is found the address of the
  74    symbol is stored in SYM_ADDR.  */
  75
  76 ps_err_e
  77 ps_pglobal_lookup (gdb_ps_prochandle_t ph, const char *obj,
  78                    const char *name, paddr_t *sym_addr)
  79 {
  80   CORE_ADDR addr;
  81
  82   if (look_up_one_symbol (name, &addr) == 0)
  83     return PS_NOSYM;
  84
  85   *sym_addr = (paddr_t) (unsigned long) addr;
  86   return PS_OK;
  87 }
  88
  89 /* Read SIZE bytes from the target process PH at address ADDR and copy
  90    them into BUF.  */
  91
  92 ps_err_e
  93 ps_pdread (gdb_ps_prochandle_t ph, paddr_t addr,
  94            gdb_ps_read_buf_t buf, gdb_ps_size_t size)
  95 {
  96   read_inferior_memory (addr, buf, size);
  97   return PS_OK;
  98 }
  99
 100 /* Write SIZE bytes from BUF into the target process PH at address ADDR.  */
 101
 102 ps_err_e
 103 ps_pdwrite (gdb_ps_prochandle_t ph, paddr_t addr,
 104             gdb_ps_write_buf_t buf, gdb_ps_size_t size)
 105 {
 106   return write_inferior_memory (addr, buf, size);
 107 }
 108
 109 /* Get the general registers of LWP LWPID within the target process PH
 110    and store them in GREGSET.  */
 111
 112 ps_err_e
 113 ps_lgetregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, prgregset_t gregset)
 114 {
 115 #ifdef HAVE_REGSETS
 116   struct process_info *process;
 117   struct thread_info *reg_inferior, *save_inferior;
 118
 119   process = (struct process_info *) find_inferior_id (&all_processes,
 120                                                       lwpid);
 121   if (process == NULL)
 122     return PS_ERR;
 123
 124   reg_inferior = get_process_thread (process);
 125   save_inferior = current_inferior;
 126   current_inferior = reg_inferior;
 127
 128   the_target->fetch_registers (0);
 129   gregset_info()->fill_function (gregset);
 130
 131   current_inferior = save_inferior;
 132   return PS_OK;
 133 #else
 134   return PS_ERR;
 135 #endif
 136 }
 137
 138 /* Set the general registers of LWP LWPID within the target process PH
 139    from GREGSET.  */
 140
 141 ps_err_e
 142 ps_lsetregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, const prgregset_t gregset)
 143 {
 144   /* Unneeded.  */
 145   return PS_ERR;
 146 }
 147
 148 /* Get the floating-point registers of LWP LWPID within the target
 149    process PH and store them in FPREGSET.  */
 150
 151 ps_err_e
 152 ps_lgetfpregs (gdb_ps_prochandle_t ph, lwpid_t lwpid,
 153                gdb_prfpregset_t *fpregset)
 154 {
 155   /* Unneeded.  */
 156   return PS_ERR;
 157 }
 158
 159 /* Set the floating-point registers of LWP LWPID within the target
 160    process PH from FPREGSET.  */
 161
 162 ps_err_e
 163 ps_lsetfpregs (gdb_ps_prochandle_t ph, lwpid_t lwpid,
 164                const gdb_prfpregset_t *fpregset)
 165 {
 166   /* Unneeded.  */
 167   return PS_ERR;
 168 }
 169
 170 /* Return overall process id of the target PH.  Special for GNU/Linux
 171    -- not used on Solaris.  */
 172
 173 pid_t
 174 ps_getpid (gdb_ps_prochandle_t ph)
 175 {
 176   return ph->pid;
 177 }
 178
 179