1 /* Subroutines for handling an "inferior" (child) process as a target
3 Copyright 1990, 1991 Free Software Foundation, Inc.
4 Contributed by Cygnus Support.
6 This file is part of GDB.
8 GDB is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 1, or (at your option)
13 GDB is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GDB; see the file COPYING. If not, write to
20 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
25 #include "frame.h" /* required by inferior.h */
30 #include "ieee-float.h" /* Required by REGISTER_CONVERT_TO_XXX */
32 extern int fetch_inferior_registers();
33 extern int store_inferior_registers();
34 extern int child_xfer_memory();
35 extern int memory_insert_breakpoint(), memory_remove_breakpoint();
36 extern void terminal_init_inferior(), terminal_ours(), terminal_inferior();
37 extern void terminal_ours_for_output(), child_terminal_info();
38 extern void kill_inferior(), add_syms_addr_command();
39 extern struct value
*call_function_by_hand();
40 extern void child_resume();
41 extern void child_create_inferior();
42 extern void child_mourn_inferior();
43 extern void child_attach ();
45 /* Forward declaration */
46 extern struct target_ops child_ops
;
48 /* Wait for child to do something. Return pid of child, or -1 in case
49 of error; store status through argument pointer STATUS. */
59 if (pid
== -1) /* No more children to wait for */
61 fprintf (stderr
, "Child process unexpectedly missing.\n");
62 *status
= 42; /* Claim it exited with signal 42 */
65 } while (pid
!= inferior_pid
); /* Some other child died or stopped */
72 * takes a program previously attached to and detaches it.
73 * The program resumes execution and will no longer stop
74 * on signals, etc. We better not have left any breakpoints
75 * in the program or it'll die when it hits one. For this
76 * to work, it may be necessary for the process to have been
77 * previously attached. It *might* work if the program was
78 * started via the normal ptrace (PTRACE_TRACEME).
82 child_detach (args
, from_tty
)
91 char *exec_file
= get_exec_file (0);
94 printf ("Detaching program: %s pid %d\n",
95 exec_file
, inferior_pid
);
99 siggnal
= atoi (args
);
103 unpush_target (&child_ops
); /* Pop out of handling an inferior */
105 error ("This version of Unix does not support detaching a process.");
109 /* Get ready to modify the registers array. On machines which store
110 individual registers, this doesn't need to do anything. On machines
111 which store all the registers in one fell swoop, this makes sure
112 that registers contains all the registers from the program being
116 child_prepare_to_store ()
118 #ifdef CHILD_PREPARE_TO_STORE
119 CHILD_PREPARE_TO_STORE ();
123 /* Convert data from raw format for register REGNUM
124 to virtual format for register REGNUM. */
127 host_convert_to_virtual (regnum
, from
, to
)
132 REGISTER_CONVERT_TO_VIRTUAL (regnum
, from
, to
);
135 /* Convert data from virtual format for register REGNUM
136 to raw format for register REGNUM. */
139 host_convert_from_virtual (regnum
, from
, to
)
144 REGISTER_CONVERT_TO_RAW (regnum
, from
, to
);
147 /* Print status information about what we're accessing. */
152 printf ("\tUsing the running image of %s process %d.\n",
153 attach_flag
? "attached": "child", inferior_pid
);
156 struct target_ops child_ops
= {
157 "child", "Unix child process",
158 0, 0, /* open, close */
159 child_attach
, child_detach
,
162 fetch_inferior_registers
, store_inferior_registers
,
163 child_prepare_to_store
,
164 host_convert_to_virtual
, host_convert_from_virtual
,
165 child_xfer_memory
, child_files_info
,
166 memory_insert_breakpoint
, memory_remove_breakpoint
,
167 terminal_init_inferior
, terminal_inferior
,
168 terminal_ours_for_output
, terminal_ours
, child_terminal_info
,
169 kill_inferior
, 0, add_syms_addr_command
, /* load */
170 call_function_by_hand
,
171 0, /* lookup_symbol */
172 child_create_inferior
, child_mourn_inferior
,
173 process_stratum
, 0, /* next */
174 1, 1, 1, 1, 1, /* all mem, mem, stack, regs, exec */
175 OPS_MAGIC
, /* Always the last thing */
179 _initialize_inftarg ()
181 add_target (&child_ops
);