1 /* Default child (native) target interface, for GDB when running under 2 Unix. 3 4 Copyright 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 5 1998, 1999, 2000, 2001, 2002, 2004 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 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 "defs.h" 25 #include "regcache.h" 26 #include "memattr.h" 27 #include "symtab.h" 28 #include "target.h" 29 #include "inferior.h" 30 #include "gdb_string.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 (int regnum) 37 { 38 if (regnum == -1) 39 { 40 for (regnum = 0; regnum < NUM_REGS; regnum++) 41 regcache_raw_supply (current_regcache, regnum, NULL); 42 } 43 else 44 regcache_raw_supply (current_regcache, regnum, NULL); 45 } 46 47 /* Store register REGNUM back into the inferior. If REGNUM is -1, do 48 this for all registers (including the floating point registers). */ 49 50 static void 51 inf_child_store_inferior_registers (int regnum) 52 { 53 } 54 55 static void 56 inf_child_post_attach (int pid) 57 { 58 /* This version of Unix doesn't require a meaningful "post attach" 59 operation by a debugger. */ 60 } 61 62 /* Get ready to modify the registers array. On machines which store 63 individual registers, this doesn't need to do anything. On 64 machines which store all the registers in one fell swoop, this 65 makes sure that registers contains all the registers from the 66 program being debugged. */ 67 68 static void 69 inf_child_prepare_to_store (void) 70 { 71 } 72 73 static void 74 inf_child_open (char *arg, int from_tty) 75 { 76 error ("Use the \"run\" command to start a Unix child process."); 77 } 78 79 static void 80 inf_child_post_startup_inferior (ptid_t ptid) 81 { 82 /* This version of Unix doesn't require a meaningful "post startup 83 inferior" operation by a debugger. */ 84 } 85 86 static void 87 inf_child_acknowledge_created_inferior (int pid) 88 { 89 /* This version of Unix doesn't require a meaningful "acknowledge 90 created inferior" operation by a debugger. */ 91 } 92 93 static int 94 inf_child_insert_fork_catchpoint (int pid) 95 { 96 /* This version of Unix doesn't support notification of fork 97 events. */ 98 return 0; 99 } 100 101 static int 102 inf_child_remove_fork_catchpoint (int pid) 103 { 104 /* This version of Unix doesn't support notification of fork 105 events. */ 106 return 0; 107 } 108 109 static int 110 inf_child_insert_vfork_catchpoint (int pid) 111 { 112 /* This version of Unix doesn't support notification of vfork 113 events. */ 114 return 0; 115 } 116 117 static int 118 inf_child_remove_vfork_catchpoint (int pid) 119 { 120 /* This version of Unix doesn't support notification of vfork 121 events. */ 122 return 0; 123 } 124 125 static int 126 inf_child_follow_fork (int follow_child) 127 { 128 /* This version of Unix doesn't support following fork or vfork 129 events. */ 130 return 0; 131 } 132 133 static int 134 inf_child_insert_exec_catchpoint (int pid) 135 { 136 /* This version of Unix doesn't support notification of exec 137 events. */ 138 return 0; 139 } 140 141 static int 142 inf_child_remove_exec_catchpoint (int pid) 143 { 144 /* This version of Unix doesn't support notification of exec 145 events. */ 146 return 0; 147 } 148 149 static int 150 inf_child_reported_exec_events_per_exec_call (void) 151 { 152 /* This version of Unix doesn't support notification of exec 153 events. */ 154 return 1; 155 } 156 157 static int 158 inf_child_can_run (void) 159 { 160 return 1; 161 } 162 163 static struct symtab_and_line * 164 inf_child_enable_exception_callback (enum exception_event_kind kind, 165 int enable) 166 { 167 return (struct symtab_and_line *) NULL; 168 } 169 170 static struct exception_event_record * 171 inf_child_get_current_exception_event (void) 172 { 173 return (struct exception_event_record *) NULL; 174 } 175 176 static char * 177 inf_child_pid_to_exec_file (int pid) 178 { 179 /* This version of Unix doesn't support translation of a process ID 180 to the filename of the executable file. */ 181 return NULL; 182 } 183 184 struct target_ops * 185 inf_child_target (void) 186 { 187 struct target_ops *t = XZALLOC (struct target_ops); 188 t->to_shortname = "child"; 189 t->to_longname = "Unix child process"; 190 t->to_doc = "Unix child process (started by the \"run\" command)."; 191 t->to_open = inf_child_open; 192 t->to_post_attach = inf_child_post_attach; 193 t->to_fetch_registers = inf_child_fetch_inferior_registers; 194 t->to_store_registers = inf_child_store_inferior_registers; 195 t->to_prepare_to_store = inf_child_prepare_to_store; 196 t->to_insert_breakpoint = memory_insert_breakpoint; 197 t->to_remove_breakpoint = memory_remove_breakpoint; 198 t->to_terminal_init = terminal_init_inferior; 199 t->to_terminal_inferior = terminal_inferior; 200 t->to_terminal_ours_for_output = terminal_ours_for_output; 201 t->to_terminal_save_ours = terminal_save_ours; 202 t->to_terminal_ours = terminal_ours; 203 t->to_terminal_info = child_terminal_info; 204 t->to_post_startup_inferior = inf_child_post_startup_inferior; 205 t->to_acknowledge_created_inferior = inf_child_acknowledge_created_inferior; 206 t->to_insert_fork_catchpoint = inf_child_insert_fork_catchpoint; 207 t->to_remove_fork_catchpoint = inf_child_remove_fork_catchpoint; 208 t->to_insert_vfork_catchpoint = inf_child_insert_vfork_catchpoint; 209 t->to_remove_vfork_catchpoint = inf_child_remove_vfork_catchpoint; 210 t->to_follow_fork = inf_child_follow_fork; 211 t->to_insert_exec_catchpoint = inf_child_insert_exec_catchpoint; 212 t->to_remove_exec_catchpoint = inf_child_remove_exec_catchpoint; 213 t->to_reported_exec_events_per_exec_call = 214 inf_child_reported_exec_events_per_exec_call; 215 t->to_can_run = inf_child_can_run; 216 t->to_enable_exception_callback = inf_child_enable_exception_callback; 217 t->to_get_current_exception_event = inf_child_get_current_exception_event; 218 t->to_pid_to_exec_file = inf_child_pid_to_exec_file; 219 t->to_stratum = process_stratum; 220 t->to_has_all_memory = 1; 221 t->to_has_memory = 1; 222 t->to_has_stack = 1; 223 t->to_has_registers = 1; 224 t->to_has_execution = 1; 225 t->to_magic = OPS_MAGIC; 226 return t; 227 } 228