| 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 |
| 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 | |
| 31 | /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this |
| 32 | for all registers. */ |
| 33 | |
| 34 | static void |
| 35 | inf_child_fetch_inferior_registers (struct regcache *regcache, int regnum) |
| 36 | { |
| 37 | if (regnum == -1) |
| 38 | { |
| 39 | for (regnum = 0; |
| 40 | regnum < gdbarch_num_regs (get_regcache_arch (regcache)); |
| 41 | regnum++) |
| 42 | regcache_raw_supply (regcache, regnum, NULL); |
| 43 | } |
| 44 | else |
| 45 | regcache_raw_supply (regcache, regnum, NULL); |
| 46 | } |
| 47 | |
| 48 | /* Store register REGNUM back into the inferior. If REGNUM is -1, do |
| 49 | this for all registers (including the floating point registers). */ |
| 50 | |
| 51 | static void |
| 52 | inf_child_store_inferior_registers (struct regcache *regcache, int regnum) |
| 53 | { |
| 54 | } |
| 55 | |
| 56 | static void |
| 57 | inf_child_post_attach (int pid) |
| 58 | { |
| 59 | /* This version of Unix doesn't require a meaningful "post attach" |
| 60 | operation by a debugger. */ |
| 61 | } |
| 62 | |
| 63 | /* Get ready to modify the registers array. On machines which store |
| 64 | individual registers, this doesn't need to do anything. On |
| 65 | machines which store all the registers in one fell swoop, this |
| 66 | makes sure that registers contains all the registers from the |
| 67 | program being debugged. */ |
| 68 | |
| 69 | static void |
| 70 | inf_child_prepare_to_store (struct regcache *regcache) |
| 71 | { |
| 72 | } |
| 73 | |
| 74 | static void |
| 75 | inf_child_open (char *arg, int from_tty) |
| 76 | { |
| 77 | error (_("Use the \"run\" command to start a Unix child process.")); |
| 78 | } |
| 79 | |
| 80 | static void |
| 81 | inf_child_post_startup_inferior (ptid_t ptid) |
| 82 | { |
| 83 | /* This version of Unix doesn't require a meaningful "post startup |
| 84 | inferior" operation by a debugger. */ |
| 85 | } |
| 86 | |
| 87 | static void |
| 88 | inf_child_acknowledge_created_inferior (int pid) |
| 89 | { |
| 90 | /* This version of Unix doesn't require a meaningful "acknowledge |
| 91 | created inferior" operation by a debugger. */ |
| 92 | } |
| 93 | |
| 94 | static void |
| 95 | inf_child_insert_fork_catchpoint (int pid) |
| 96 | { |
| 97 | /* This version of Unix doesn't support notification of fork |
| 98 | events. */ |
| 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 void |
| 110 | inf_child_insert_vfork_catchpoint (int pid) |
| 111 | { |
| 112 | /* This version of Unix doesn't support notification of vfork |
| 113 | events. */ |
| 114 | } |
| 115 | |
| 116 | static int |
| 117 | inf_child_remove_vfork_catchpoint (int pid) |
| 118 | { |
| 119 | /* This version of Unix doesn't support notification of vfork |
| 120 | events. */ |
| 121 | return 0; |
| 122 | } |
| 123 | |
| 124 | static int |
| 125 | inf_child_follow_fork (struct target_ops *ops, int follow_child) |
| 126 | { |
| 127 | /* This version of Unix doesn't support following fork or vfork |
| 128 | events. */ |
| 129 | return 0; |
| 130 | } |
| 131 | |
| 132 | static void |
| 133 | inf_child_insert_exec_catchpoint (int pid) |
| 134 | { |
| 135 | /* This version of Unix doesn't support notification of exec |
| 136 | events. */ |
| 137 | } |
| 138 | |
| 139 | static int |
| 140 | inf_child_remove_exec_catchpoint (int pid) |
| 141 | { |
| 142 | /* This version of Unix doesn't support notification of exec |
| 143 | events. */ |
| 144 | return 0; |
| 145 | } |
| 146 | |
| 147 | static int |
| 148 | inf_child_can_run (void) |
| 149 | { |
| 150 | return 1; |
| 151 | } |
| 152 | |
| 153 | static char * |
| 154 | inf_child_pid_to_exec_file (int pid) |
| 155 | { |
| 156 | /* This version of Unix doesn't support translation of a process ID |
| 157 | to the filename of the executable file. */ |
| 158 | return NULL; |
| 159 | } |
| 160 | |
| 161 | struct target_ops * |
| 162 | inf_child_target (void) |
| 163 | { |
| 164 | struct target_ops *t = XZALLOC (struct target_ops); |
| 165 | t->to_shortname = "child"; |
| 166 | t->to_longname = "Unix child process"; |
| 167 | t->to_doc = "Unix child process (started by the \"run\" command)."; |
| 168 | t->to_open = inf_child_open; |
| 169 | t->to_post_attach = inf_child_post_attach; |
| 170 | t->to_fetch_registers = inf_child_fetch_inferior_registers; |
| 171 | t->to_store_registers = inf_child_store_inferior_registers; |
| 172 | t->to_prepare_to_store = inf_child_prepare_to_store; |
| 173 | t->to_insert_breakpoint = memory_insert_breakpoint; |
| 174 | t->to_remove_breakpoint = memory_remove_breakpoint; |
| 175 | t->to_terminal_init = terminal_init_inferior; |
| 176 | t->to_terminal_inferior = terminal_inferior; |
| 177 | t->to_terminal_ours_for_output = terminal_ours_for_output; |
| 178 | t->to_terminal_save_ours = terminal_save_ours; |
| 179 | t->to_terminal_ours = terminal_ours; |
| 180 | t->to_terminal_info = child_terminal_info; |
| 181 | t->to_post_startup_inferior = inf_child_post_startup_inferior; |
| 182 | t->to_acknowledge_created_inferior = inf_child_acknowledge_created_inferior; |
| 183 | t->to_insert_fork_catchpoint = inf_child_insert_fork_catchpoint; |
| 184 | t->to_remove_fork_catchpoint = inf_child_remove_fork_catchpoint; |
| 185 | t->to_insert_vfork_catchpoint = inf_child_insert_vfork_catchpoint; |
| 186 | t->to_remove_vfork_catchpoint = inf_child_remove_vfork_catchpoint; |
| 187 | t->to_follow_fork = inf_child_follow_fork; |
| 188 | t->to_insert_exec_catchpoint = inf_child_insert_exec_catchpoint; |
| 189 | t->to_remove_exec_catchpoint = inf_child_remove_exec_catchpoint; |
| 190 | t->to_can_run = inf_child_can_run; |
| 191 | t->to_pid_to_exec_file = inf_child_pid_to_exec_file; |
| 192 | t->to_stratum = process_stratum; |
| 193 | t->to_has_all_memory = 1; |
| 194 | t->to_has_memory = 1; |
| 195 | t->to_has_stack = 1; |
| 196 | t->to_has_registers = 1; |
| 197 | t->to_has_execution = 1; |
| 198 | t->to_magic = OPS_MAGIC; |
| 199 | return t; |
| 200 | } |