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, 2010, 2011 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 int 91 inf_child_follow_fork (struct target_ops *ops, int follow_child) 92 { 93 /* This version of Unix doesn't support following fork or vfork 94 events. */ 95 return 0; 96 } 97 98 static int 99 inf_child_can_run (void) 100 { 101 return 1; 102 } 103 104 static char * 105 inf_child_pid_to_exec_file (int pid) 106 { 107 /* This version of Unix doesn't support translation of a process ID 108 to the filename of the executable file. */ 109 return NULL; 110 } 111 112 struct target_ops * 113 inf_child_target (void) 114 { 115 struct target_ops *t = XZALLOC (struct target_ops); 116 117 t->to_shortname = "child"; 118 t->to_longname = "Unix child process"; 119 t->to_doc = "Unix child process (started by the \"run\" command)."; 120 t->to_open = inf_child_open; 121 t->to_post_attach = inf_child_post_attach; 122 t->to_fetch_registers = inf_child_fetch_inferior_registers; 123 t->to_store_registers = inf_child_store_inferior_registers; 124 t->to_prepare_to_store = inf_child_prepare_to_store; 125 t->to_insert_breakpoint = memory_insert_breakpoint; 126 t->to_remove_breakpoint = memory_remove_breakpoint; 127 t->to_terminal_init = terminal_init_inferior; 128 t->to_terminal_inferior = terminal_inferior; 129 t->to_terminal_ours_for_output = terminal_ours_for_output; 130 t->to_terminal_save_ours = terminal_save_ours; 131 t->to_terminal_ours = terminal_ours; 132 t->to_terminal_info = child_terminal_info; 133 t->to_post_startup_inferior = inf_child_post_startup_inferior; 134 t->to_follow_fork = inf_child_follow_fork; 135 t->to_can_run = inf_child_can_run; 136 t->to_pid_to_exec_file = inf_child_pid_to_exec_file; 137 t->to_stratum = process_stratum; 138 t->to_has_all_memory = default_child_has_all_memory; 139 t->to_has_memory = default_child_has_memory; 140 t->to_has_stack = default_child_has_stack; 141 t->to_has_registers = default_child_has_registers; 142 t->to_has_execution = default_child_has_execution; 143 t->to_magic = OPS_MAGIC; 144 return t; 145 } 146