| 1 | /* Variables that describe the inferior process running under GDB: |
| 2 | Where it is, why it stopped, and how to step it. |
| 3 | Copyright (C) 1986, 1989 Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GDB. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 20 | |
| 21 | /* For bpstat. */ |
| 22 | #include "breakpoint.h" |
| 23 | |
| 24 | /* For FRAME_ADDR. */ |
| 25 | #include "frame.h" |
| 26 | |
| 27 | /* |
| 28 | * Structure in which to save the status of the inferior. Save |
| 29 | * through "save_inferior_status", restore through |
| 30 | * "restore_inferior_status". |
| 31 | * This pair of routines should be called around any transfer of |
| 32 | * control to the inferior which you don't want showing up in your |
| 33 | * control variables. |
| 34 | */ |
| 35 | struct inferior_status { |
| 36 | int pc_changed; |
| 37 | int stop_signal; |
| 38 | int stop_pc; |
| 39 | FRAME_ADDR stop_frame_address; |
| 40 | bpstat stop_bpstat; |
| 41 | int stop_step; |
| 42 | int stop_stack_dummy; |
| 43 | int stopped_by_random_signal; |
| 44 | int trap_expected; |
| 45 | CORE_ADDR step_range_start; |
| 46 | CORE_ADDR step_range_end; |
| 47 | FRAME_ADDR step_frame_address; |
| 48 | int step_over_calls; |
| 49 | CORE_ADDR step_resume_break_address; |
| 50 | int stop_after_trap; |
| 51 | int stop_soon_quietly; |
| 52 | FRAME_ADDR selected_frame_address; |
| 53 | int selected_level; |
| 54 | char stop_registers[REGISTER_BYTES]; |
| 55 | int breakpoint_proceeded; |
| 56 | int restore_stack_info; |
| 57 | int proceed_to_finish; |
| 58 | }; |
| 59 | |
| 60 | void save_inferior_status (), restore_inferior_status (); |
| 61 | |
| 62 | /* File name for default use for standard in/out in the inferior. */ |
| 63 | |
| 64 | extern char *inferior_io_terminal; |
| 65 | |
| 66 | /* Pid of our debugged inferior, or 0 if no inferior now. */ |
| 67 | |
| 68 | extern int inferior_pid; |
| 69 | |
| 70 | /* Character array containing an image of the inferior programs' registers. */ |
| 71 | |
| 72 | extern char registers[]; |
| 73 | |
| 74 | extern void clear_proceed_status (); |
| 75 | extern void start_inferior (); |
| 76 | extern void proceed (); |
| 77 | extern void kill_inferior (); |
| 78 | extern void kill_inferior_fast (); |
| 79 | extern void generic_mourn_inferior (); |
| 80 | extern void terminal_ours (); |
| 81 | extern void detach (); |
| 82 | extern void run_stack_dummy (); |
| 83 | extern CORE_ADDR read_pc (); |
| 84 | extern void write_pc (); |
| 85 | extern void wait_for_inferior (); |
| 86 | extern void init_wait_for_inferior (); |
| 87 | extern void close_exec_file (); |
| 88 | extern void reopen_exec_file (); |
| 89 | |
| 90 | /* From infcmd.c */ |
| 91 | void attach_command ( |
| 92 | #ifdef __STDC__ |
| 93 | char *arg, int from_tty |
| 94 | #endif |
| 95 | ); |
| 96 | |
| 97 | /* Last signal that the inferior received (why it stopped). */ |
| 98 | |
| 99 | extern int stop_signal; |
| 100 | |
| 101 | /* Address at which inferior stopped. */ |
| 102 | |
| 103 | extern CORE_ADDR stop_pc; |
| 104 | |
| 105 | /* Stack frame when program stopped. */ |
| 106 | |
| 107 | extern FRAME_ADDR stop_frame_address; |
| 108 | |
| 109 | /* Chain containing status of breakpoint(s) that we have stopped at. */ |
| 110 | |
| 111 | extern bpstat stop_bpstat; |
| 112 | |
| 113 | /* Flag indicating that a command has proceeded the inferior past the |
| 114 | current breakpoint. */ |
| 115 | |
| 116 | extern int breakpoint_proceeded; |
| 117 | |
| 118 | /* Nonzero if stopped due to a step command. */ |
| 119 | |
| 120 | extern int stop_step; |
| 121 | |
| 122 | /* Nonzero if stopped due to completion of a stack dummy routine. */ |
| 123 | |
| 124 | extern int stop_stack_dummy; |
| 125 | |
| 126 | /* Nonzero if program stopped due to a random (unexpected) signal in |
| 127 | inferior process. */ |
| 128 | |
| 129 | extern int stopped_by_random_signal; |
| 130 | |
| 131 | /* Range to single step within. |
| 132 | If this is nonzero, respond to a single-step signal |
| 133 | by continuing to step if the pc is in this range. */ |
| 134 | |
| 135 | extern CORE_ADDR step_range_start; /* Inclusive */ |
| 136 | extern CORE_ADDR step_range_end; /* Exclusive */ |
| 137 | |
| 138 | /* Stack frame address as of when stepping command was issued. |
| 139 | This is how we know when we step into a subroutine call, |
| 140 | and how to set the frame for the breakpoint used to step out. */ |
| 141 | |
| 142 | extern FRAME_ADDR step_frame_address; |
| 143 | |
| 144 | /* 1 means step over all subroutine calls. |
| 145 | -1 means step over calls to undebuggable functions. */ |
| 146 | |
| 147 | extern int step_over_calls; |
| 148 | |
| 149 | /* If stepping, nonzero means step count is > 1 |
| 150 | so don't print frame next time inferior stops |
| 151 | if it stops due to stepping. */ |
| 152 | |
| 153 | extern int step_multi; |
| 154 | |
| 155 | /* Nonzero means expecting a trap and caller will handle it themselves. |
| 156 | It is used after attach, due to attaching to a process; |
| 157 | when running in the shell before the child program has been exec'd; |
| 158 | and when running some kinds of remote stuff (FIXME?). */ |
| 159 | |
| 160 | int stop_soon_quietly; |
| 161 | |
| 162 | /* Nonzero if proceed is being used for a "finish" command or a similar |
| 163 | situation when stop_registers should be saved. */ |
| 164 | |
| 165 | extern int proceed_to_finish; |
| 166 | |
| 167 | /* Save register contents here when about to pop a stack dummy frame, |
| 168 | if-and-only-if proceed_to_finish is set. |
| 169 | Thus this contains the return value from the called function (assuming |
| 170 | values are returned in a register). */ |
| 171 | |
| 172 | extern char stop_registers[REGISTER_BYTES]; |
| 173 | |
| 174 | /* Nonzero if pc has been changed by the debugger |
| 175 | since the inferior stopped. */ |
| 176 | |
| 177 | extern int pc_changed; |
| 178 | |
| 179 | /* Nonzero if the child process in inferior_pid was attached rather |
| 180 | than forked. */ |
| 181 | |
| 182 | int attach_flag; |
| 183 | \f |
| 184 | /* Possible values for CALL_DUMMY_LOCATION. */ |
| 185 | #define ON_STACK 1 |
| 186 | #define BEFORE_TEXT_END 2 |
| 187 | #define AFTER_TEXT_END 3 |
| 188 | |
| 189 | #if !defined (CALL_DUMMY_LOCATION) |
| 190 | #define CALL_DUMMY_LOCATION ON_STACK |
| 191 | #endif /* No CALL_DUMMY_LOCATION. */ |
| 192 | |
| 193 | /* Are we in a call dummy? The code below which allows DECR_PC_AFTER_BREAK |
| 194 | below is for infrun.c, which may give the macro a pc without that |
| 195 | subtracted out. */ |
| 196 | #if !defined (PC_IN_CALL_DUMMY) |
| 197 | #if CALL_DUMMY_LOCATION == BEFORE_TEXT_END |
| 198 | #define PC_IN_CALL_DUMMY(pc, sp, frame_address) \ |
| 199 | ((pc) >= text_end - CALL_DUMMY_LENGTH \ |
| 200 | && (pc) < text_end + DECR_PC_AFTER_BREAK) |
| 201 | #else /* Not before text_end. */ |
| 202 | #if CALL_DUMMY_LOCATION == AFTER_TEXT_END |
| 203 | #define PC_IN_CALL_DUMMY(pc, sp, frame_address) \ |
| 204 | ((pc) >= text_end \ |
| 205 | && (pc) < text_end + CALL_DUMMY_LENGTH + DECR_PC_AFTER_BREAK) |
| 206 | #else /* On stack. */ |
| 207 | #define PC_IN_CALL_DUMMY(pc, sp, frame_address) \ |
| 208 | ((sp) INNER_THAN (pc) && (pc) INNER_THAN (frame_address)) |
| 209 | #endif /* On stack. */ |
| 210 | #endif /* Not before text_end. */ |
| 211 | #endif /* No PC_IN_CALL_DUMMY. */ |