1/* Default child (native) target interface, for GDB when running under 2 Unix. 3 4 Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1998, 5 1999, 2000, 2001, 2002, 2004, 2005, 2007 Free Software Foundation, Inc. 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 "defs.h" 23#include "regcache.h" 24#include "memattr.h" 25#include "symtab.h" 26#include "target.h" 27#include "inferior.h" 28#include "gdb_string.h" 29 30/* Fetch register REGNUM from the inferior. If REGNUM is -1, do this 31 for all registers. */ 32 33static void 34inf_child_fetch_inferior_registers (struct regcache *regcache, int regnum) 35{ 36 if (regnum == -1) 37 { 38 for (regnum = 0; regnum < gdbarch_num_regs (current_gdbarch); regnum++) 39 regcache_raw_supply (regcache, regnum, NULL); 40 } 41 else 42 regcache_raw_supply (regcache, regnum, NULL); 43} 44 45/* Store register REGNUM back into the inferior. If REGNUM is -1, do 46 this for all registers (including the floating point registers). */ 47 48static void 49inf_child_store_inferior_registers (struct regcache *regcache, int regnum) 50{ 51} 52 53static void 54inf_child_post_attach (int pid) 55{ 56 /* This version of Unix doesn't require a meaningful "post attach" 57 operation by a debugger. */ 58} 59 60/* Get ready to modify the registers array. On machines which store 61 individual registers, this doesn't need to do anything. On 62 machines which store all the registers in one fell swoop, this 63 makes sure that registers contains all the registers from the 64 program being debugged. */ 65 66static void 67inf_child_prepare_to_store (struct regcache *regcache) 68{ 69} 70 71static void 72inf_child_open (char *arg, int from_tty) 73{ 74 error (_("Use the \"run\" command to start a Unix child process.")); 75} 76 77static void 78inf_child_post_startup_inferior (ptid_t ptid) 79{ 80 /* This version of Unix doesn't require a meaningful "post startup 81 inferior" operation by a debugger. */ 82} 83 84static void 85inf_child_acknowledge_created_inferior (int pid) 86{ 87 /* This version of Unix doesn't require a meaningful "acknowledge 88 created inferior" operation by a debugger. */ 89} 90 91static void 92inf_child_insert_fork_catchpoint (int pid) 93{ 94 /* This version of Unix doesn't support notification of fork 95 events. */ 96} 97 98static int 99inf_child_remove_fork_catchpoint (int pid) 100{ 101 /* This version of Unix doesn't support notification of fork 102 events. */ 103 return 0; 104} 105 106static void 107inf_child_insert_vfork_catchpoint (int pid) 108{ 109 /* This version of Unix doesn't support notification of vfork 110 events. */ 111} 112 113static int 114inf_child_remove_vfork_catchpoint (int pid) 115{ 116 /* This version of Unix doesn't support notification of vfork 117 events. */ 118 return 0; 119} 120 121static int 122inf_child_follow_fork (struct target_ops *ops, int follow_child) 123{ 124 /* This version of Unix doesn't support following fork or vfork 125 events. */ 126 return 0; 127} 128 129static void 130inf_child_insert_exec_catchpoint (int pid) 131{ 132 /* This version of Unix doesn't support notification of exec 133 events. */ 134} 135 136static int 137inf_child_remove_exec_catchpoint (int pid) 138{ 139 /* This version of Unix doesn't support notification of exec 140 events. */ 141 return 0; 142} 143 144static int 145inf_child_reported_exec_events_per_exec_call (void) 146{ 147 /* This version of Unix doesn't support notification of exec 148 events. */ 149 return 1; 150} 151 152static int 153inf_child_can_run (void) 154{ 155 return 1; 156} 157 158static struct symtab_and_line * 159inf_child_enable_exception_callback (enum exception_event_kind kind, 160 int enable) 161{ 162 return (struct symtab_and_line *) NULL; 163} 164 165static struct exception_event_record * 166inf_child_get_current_exception_event (void) 167{ 168 return (struct exception_event_record *) NULL; 169} 170 171static char * 172inf_child_pid_to_exec_file (int pid) 173{ 174 /* This version of Unix doesn't support translation of a process ID 175 to the filename of the executable file. */ 176 return NULL; 177} 178 179struct target_ops * 180inf_child_target (void) 181{ 182 struct target_ops *t = XZALLOC (struct target_ops); 183 t->to_shortname = "child"; 184 t->to_longname = "Unix child process"; 185 t->to_doc = "Unix child process (started by the \"run\" command)."; 186 t->to_open = inf_child_open; 187 t->to_post_attach = inf_child_post_attach; 188 t->to_fetch_registers = inf_child_fetch_inferior_registers; 189 t->to_store_registers = inf_child_store_inferior_registers; 190 t->to_prepare_to_store = inf_child_prepare_to_store; 191 t->to_insert_breakpoint = memory_insert_breakpoint; 192 t->to_remove_breakpoint = memory_remove_breakpoint; 193 t->to_terminal_init = terminal_init_inferior; 194 t->to_terminal_inferior = terminal_inferior; 195 t->to_terminal_ours_for_output = terminal_ours_for_output; 196 t->to_terminal_save_ours = terminal_save_ours; 197 t->to_terminal_ours = terminal_ours; 198 t->to_terminal_info = child_terminal_info; 199 t->to_post_startup_inferior = inf_child_post_startup_inferior; 200 t->to_acknowledge_created_inferior = inf_child_acknowledge_created_inferior; 201 t->to_insert_fork_catchpoint = inf_child_insert_fork_catchpoint; 202 t->to_remove_fork_catchpoint = inf_child_remove_fork_catchpoint; 203 t->to_insert_vfork_catchpoint = inf_child_insert_vfork_catchpoint; 204 t->to_remove_vfork_catchpoint = inf_child_remove_vfork_catchpoint; 205 t->to_follow_fork = inf_child_follow_fork; 206 t->to_insert_exec_catchpoint = inf_child_insert_exec_catchpoint; 207 t->to_remove_exec_catchpoint = inf_child_remove_exec_catchpoint; 208 t->to_reported_exec_events_per_exec_call = 209 inf_child_reported_exec_events_per_exec_call; 210 t->to_can_run = inf_child_can_run; 211 t->to_enable_exception_callback = inf_child_enable_exception_callback; 212 t->to_get_current_exception_event = inf_child_get_current_exception_event; 213 t->to_pid_to_exec_file = inf_child_pid_to_exec_file; 214 t->to_stratum = process_stratum; 215 t->to_has_all_memory = 1; 216 t->to_has_memory = 1; 217 t->to_has_stack = 1; 218 t->to_has_registers = 1; 219 t->to_has_execution = 1; 220 t->to_magic = OPS_MAGIC; 221 return t; 222} 223