gdb/gdbserver/proc-service.c

   1 /* libthread_db helper functions for the remote server for GDB.
   2    Copyright (C) 2002, 2004, 2005, 2006
   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., 51 Franklin Street, Fifth Floor,
  22    Boston, MA 02110-1301, 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 #include "gdb_proc_service.h"
  33
  34 typedef struct ps_prochandle *gdb_ps_prochandle_t;
  35 typedef void *gdb_ps_read_buf_t;
  36 typedef const void *gdb_ps_write_buf_t;
  37 typedef size_t gdb_ps_size_t;
  38
  39 #ifdef HAVE_LINUX_REGSETS
  40 #define HAVE_REGSETS
  41 #endif
  42
  43 #ifdef HAVE_REGSETS
  44 static struct regset_info *
  45 gregset_info(void)
  46 {
  47   int i = 0;
  48
  49   while (target_regsets[i].size != -1)
  50     {
  51       if (target_regsets[i].type == GENERAL_REGS)
  52         break;
  53       i++;
  54     }
  55
  56   return &target_regsets[i];
  57 }
  58 #endif
  59
  60 /* Search for the symbol named NAME within the object named OBJ within
  61    the target process PH.  If the symbol is found the address of the
  62    symbol is stored in SYM_ADDR.  */
  63
  64 ps_err_e
  65 ps_pglobal_lookup (gdb_ps_prochandle_t ph, const char *obj,
  66                    const char *name, psaddr_t *sym_addr)
  67 {
  68   CORE_ADDR addr;
  69
  70   if (look_up_one_symbol (name, &addr) == 0)
  71     return PS_NOSYM;
  72
  73   *sym_addr = (psaddr_t) (unsigned long) addr;
  74   return PS_OK;
  75 }
  76
  77 /* Read SIZE bytes from the target process PH at address ADDR and copy
  78    them into BUF.  */
  79
  80 ps_err_e
  81 ps_pdread (gdb_ps_prochandle_t ph, psaddr_t addr,
  82            gdb_ps_read_buf_t buf, gdb_ps_size_t size)
  83 {
  84   read_inferior_memory ((unsigned long) addr, buf, size);
  85   return PS_OK;
  86 }
  87
  88 /* Write SIZE bytes from BUF into the target process PH at address ADDR.  */
  89
  90 ps_err_e
  91 ps_pdwrite (gdb_ps_prochandle_t ph, psaddr_t addr,
  92             gdb_ps_write_buf_t buf, gdb_ps_size_t size)
  93 {
  94   return write_inferior_memory ((unsigned long) addr, buf, size);
  95 }
  96
  97 /* Get the general registers of LWP LWPID within the target process PH
  98    and store them in GREGSET.  */
  99
 100 ps_err_e
 101 ps_lgetregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, prgregset_t gregset)
 102 {
 103 #ifdef HAVE_REGSETS
 104   struct process_info *process;
 105   struct thread_info *reg_inferior, *save_inferior;
 106
 107   process = (struct process_info *) find_inferior_id (&all_processes,
 108                                                       lwpid);
 109   if (process == NULL)
 110     return PS_ERR;
 111
 112   reg_inferior = get_process_thread (process);
 113   save_inferior = current_inferior;
 114   current_inferior = reg_inferior;
 115
 116   the_target->fetch_registers (0);
 117   gregset_info()->fill_function (gregset);
 118
 119   current_inferior = save_inferior;
 120   return PS_OK;
 121 #else
 122   return PS_ERR;
 123 #endif
 124 }
 125
 126 /* Set the general registers of LWP LWPID within the target process PH
 127    from GREGSET.  */
 128
 129 ps_err_e
 130 ps_lsetregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, const prgregset_t gregset)
 131 {
 132   /* Unneeded.  */
 133   return PS_ERR;
 134 }
 135
 136 /* Get the floating-point registers of LWP LWPID within the target
 137    process PH and store them in FPREGSET.  */
 138
 139 ps_err_e
 140 ps_lgetfpregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, void *fpregset)
 141 {
 142   /* Unneeded.  */
 143   return PS_ERR;
 144 }
 145
 146 /* Set the floating-point registers of LWP LWPID within the target
 147    process PH from FPREGSET.  */
 148
 149 ps_err_e
 150 ps_lsetfpregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, void *fpregset)
 151 {
 152   /* Unneeded.  */
 153   return PS_ERR;
 154 }
 155
 156 /* Return overall process id of the target PH.  Special for GNU/Linux
 157    -- not used on Solaris.  */
 158
 159 pid_t
 160 ps_getpid (gdb_ps_prochandle_t ph)
 161 {
 162   return ph->pid;
 163 }
 164
 165