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, 2008, 2009 6 Free Software Foundation, Inc. 7 8 This file is part of GDB. 9 10 This program is free software; you can redistribute it and/or modify 11 it under the terms of the GNU General Public License as published by 12 the Free Software Foundation; either version 3 of the License, or 13 (at your option) any later version. 14 15 This program is distributed in the hope that it will be useful, 16 but WITHOUT ANY WARRANTY; without even the implied warranty of 17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 GNU General Public License for more details. 19 20 You should have received a copy of the GNU General Public License 21 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 22 23 #include "defs.h" 24 #include "regcache.h" 25 #include "memattr.h" 26 #include "symtab.h" 27 #include "target.h" 28 #include "inferior.h" 29 #include "gdb_string.h" 30 #include "inf-child.h" 31 32 /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this 33 for all registers. */ 34 35 static void 36 inf_child_fetch_inferior_registers (struct target_ops *ops, 37 struct regcache *regcache, int regnum) 38 { 39 if (regnum == -1) 40 { 41 for (regnum = 0; 42 regnum < gdbarch_num_regs (get_regcache_arch (regcache)); 43 regnum++) 44 regcache_raw_supply (regcache, regnum, NULL); 45 } 46 else 47 regcache_raw_supply (regcache, regnum, NULL); 48 } 49 50 /* Store register REGNUM back into the inferior. If REGNUM is -1, do 51 this for all registers (including the floating point registers). */ 52 53 static void 54 inf_child_store_inferior_registers (struct target_ops *ops, 55 struct regcache *regcache, int regnum) 56 { 57 } 58 59 static void 60 inf_child_post_attach (int pid) 61 { 62 /* This version of Unix doesn't require a meaningful "post attach" 63 operation by a debugger. */ 64 } 65 66 /* Get ready to modify the registers array. On machines which store 67 individual registers, this doesn't need to do anything. On 68 machines which store all the registers in one fell swoop, this 69 makes sure that registers contains all the registers from the 70 program being debugged. */ 71 72 static void 73 inf_child_prepare_to_store (struct regcache *regcache) 74 { 75 } 76 77 static void 78 inf_child_open (char *arg, int from_tty) 79 { 80 error (_("Use the \"run\" command to start a Unix child process.")); 81 } 82 83 static void 84 inf_child_post_startup_inferior (ptid_t ptid) 85 { 86 /* This version of Unix doesn't require a meaningful "post startup 87 inferior" operation by a debugger. */ 88 } 89 90 static void 91 inf_child_acknowledge_created_inferior (int pid) 92 { 93 /* This version of Unix doesn't require a meaningful "acknowledge 94 created inferior" operation by a debugger. */ 95 } 96 97 static void 98 inf_child_insert_fork_catchpoint (int pid) 99 { 100 /* This version of Unix doesn't support notification of fork 101 events. */ 102 } 103 104 static int 105 inf_child_remove_fork_catchpoint (int pid) 106 { 107 /* This version of Unix doesn't support notification of fork 108 events. */ 109 return 0; 110 } 111 112 static void 113 inf_child_insert_vfork_catchpoint (int pid) 114 { 115 /* This version of Unix doesn't support notification of vfork 116 events. */ 117 } 118 119 static int 120 inf_child_remove_vfork_catchpoint (int pid) 121 { 122 /* This version of Unix doesn't support notification of vfork 123 events. */ 124 return 0; 125 } 126 127 static int 128 inf_child_follow_fork (struct target_ops *ops, int follow_child) 129 { 130 /* This version of Unix doesn't support following fork or vfork 131 events. */ 132 return 0; 133 } 134 135 static void 136 inf_child_insert_exec_catchpoint (int pid) 137 { 138 /* This version of Unix doesn't support notification of exec 139 events. */ 140 } 141 142 static int 143 inf_child_remove_exec_catchpoint (int pid) 144 { 145 /* This version of Unix doesn't support notification of exec 146 events. */ 147 return 0; 148 } 149 150 static int 151 inf_child_set_syscall_catchpoint (int pid, int needed, int any_count, 152 int table_size, int *table) 153 { 154 /* This version of Unix doesn't support notification of syscall 155 events. */ 156 return 0; 157 } 158 159 static int 160 inf_child_can_run (void) 161 { 162 return 1; 163 } 164 165 static char * 166 inf_child_pid_to_exec_file (int pid) 167 { 168 /* This version of Unix doesn't support translation of a process ID 169 to the filename of the executable file. */ 170 return NULL; 171 } 172 173 struct target_ops * 174 inf_child_target (void) 175 { 176 struct target_ops *t = XZALLOC (struct target_ops); 177 t->to_shortname = "child"; 178 t->to_longname = "Unix child process"; 179 t->to_doc = "Unix child process (started by the \"run\" command)."; 180 t->to_open = inf_child_open; 181 t->to_post_attach = inf_child_post_attach; 182 t->to_fetch_registers = inf_child_fetch_inferior_registers; 183 t->to_store_registers = inf_child_store_inferior_registers; 184 t->to_prepare_to_store = inf_child_prepare_to_store; 185 t->to_insert_breakpoint = memory_insert_breakpoint; 186 t->to_remove_breakpoint = memory_remove_breakpoint; 187 t->to_terminal_init = terminal_init_inferior; 188 t->to_terminal_inferior = terminal_inferior; 189 t->to_terminal_ours_for_output = terminal_ours_for_output; 190 t->to_terminal_save_ours = terminal_save_ours; 191 t->to_terminal_ours = terminal_ours; 192 t->to_terminal_info = child_terminal_info; 193 t->to_post_startup_inferior = inf_child_post_startup_inferior; 194 t->to_acknowledge_created_inferior = inf_child_acknowledge_created_inferior; 195 t->to_insert_fork_catchpoint = inf_child_insert_fork_catchpoint; 196 t->to_remove_fork_catchpoint = inf_child_remove_fork_catchpoint; 197 t->to_insert_vfork_catchpoint = inf_child_insert_vfork_catchpoint; 198 t->to_remove_vfork_catchpoint = inf_child_remove_vfork_catchpoint; 199 t->to_follow_fork = inf_child_follow_fork; 200 t->to_insert_exec_catchpoint = inf_child_insert_exec_catchpoint; 201 t->to_remove_exec_catchpoint = inf_child_remove_exec_catchpoint; 202 t->to_set_syscall_catchpoint = inf_child_set_syscall_catchpoint; 203 t->to_can_run = inf_child_can_run; 204 t->to_pid_to_exec_file = inf_child_pid_to_exec_file; 205 t->to_stratum = process_stratum; 206 t->to_has_all_memory = default_child_has_all_memory; 207 t->to_has_memory = default_child_has_memory; 208 t->to_has_stack = default_child_has_stack; 209 t->to_has_registers = default_child_has_registers; 210 t->to_has_execution = default_child_has_execution; 211 t->to_magic = OPS_MAGIC; 212 return t; 213 } 214