gdb/inferior.h

   1 /* Variables that describe the inferior process running under GDB:
   2    Where it is, why it stopped, and how to step it.
   3    Copyright 1986, 1989, 1992 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 #if !defined (INFERIOR_H)
  22 #define INFERIOR_H 1
  23
  24 /* For symtab_and_line */
  25 #include "symtab.h"
  26
  27 /* For bpstat.  */
  28 #include "breakpoint.h"
  29
  30 /* For FRAME_ADDR.  */
  31 #include "frame.h"
  32
  33 /*
  34  * Structure in which to save the status of the inferior.  Save
  35  * through "save_inferior_status", restore through
  36  * "restore_inferior_status".
  37  * This pair of routines should be called around any transfer of
  38  * control to the inferior which you don't want showing up in your
  39  * control variables.
  40  */
  41 struct inferior_status {
  42   int pc_changed;
  43   int stop_signal;
  44   int stop_pc;
  45   FRAME_ADDR stop_frame_address;
  46   bpstat stop_bpstat;
  47   int stop_step;
  48   int stop_stack_dummy;
  49   int stopped_by_random_signal;
  50   int trap_expected;
  51   CORE_ADDR step_range_start;
  52   CORE_ADDR step_range_end;
  53   FRAME_ADDR step_frame_address;
  54   int step_over_calls;
  55   CORE_ADDR step_resume_break_address;
  56   int stop_after_trap;
  57   int stop_soon_quietly;
  58   FRAME_ADDR selected_frame_address;
  59   int selected_level;
  60   char stop_registers[REGISTER_BYTES];
  61   int breakpoint_proceeded;
  62   int restore_stack_info;
  63   int proceed_to_finish;
  64 };
  65
  66 extern void
  67 save_inferior_status PARAMS ((struct inferior_status *, int));
  68
  69 extern void
  70 restore_inferior_status PARAMS ((struct inferior_status *));
  71
  72 /* File name for default use for standard in/out in the inferior.  */
  73
  74 extern char *inferior_io_terminal;
  75
  76 /* Pid of our debugged inferior, or 0 if no inferior now.  */
  77
  78 extern int inferior_pid;
  79
  80 /* Character array containing an image of the inferior programs' registers.  */
  81
  82 extern char registers[];
  83
  84 extern void
  85 clear_proceed_status PARAMS ((void));
  86
  87 extern void
  88 proceed PARAMS ((CORE_ADDR, int, int));
  89
  90 extern void
  91 kill_inferior PARAMS ((void));
  92
  93 extern void
  94 kill_inferior_fast PARAMS ((void));
  95
  96 extern void
  97 generic_mourn_inferior PARAMS ((void));
  98
  99 extern void
 100 terminal_ours PARAMS ((void));
 101
 102 extern void
 103 run_stack_dummy PARAMS ((CORE_ADDR, char [REGISTER_BYTES]));
 104
 105 extern CORE_ADDR
 106 read_pc PARAMS ((void));
 107
 108 extern void
 109 write_pc PARAMS ((CORE_ADDR));
 110
 111 extern void
 112 wait_for_inferior PARAMS ((void));
 113
 114 extern void
 115 init_wait_for_inferior PARAMS ((void));
 116
 117 extern void
 118 close_exec_file PARAMS ((void));
 119
 120 extern void
 121 reopen_exec_file PARAMS ((void));
 122
 123 /* From misc files */
 124
 125 extern void
 126 store_inferior_registers PARAMS ((int));
 127
 128 extern void
 129 fetch_inferior_registers PARAMS ((int));
 130
 131 extern void
 132 solib_create_inferior_hook PARAMS ((void));
 133
 134 extern void
 135 child_mourn_inferior PARAMS ((void));
 136
 137 extern void
 138 child_terminal_info PARAMS ((char *, int));
 139
 140 extern void
 141 term_info PARAMS ((char *, int));
 142
 143 extern void
 144 terminal_ours_for_output PARAMS ((void));
 145
 146 extern void
 147 terminal_inferior PARAMS ((void));
 148
 149 extern void
 150 terminal_init_inferior PARAMS ((void));
 151
 152 /* From infptrace.c or procfs.c */
 153
 154 extern int
 155 attach PARAMS ((int));
 156
 157 void
 158 detach PARAMS ((int));
 159
 160 extern void
 161 child_resume PARAMS ((int, int));
 162
 163 /* From procfs.c */
 164
 165 #ifdef USE_PROC_FS
 166
 167 extern int
 168 proc_iterate_over_mappings PARAMS ((int (*) (int, CORE_ADDR)));
 169
 170 extern int
 171 proc_wait PARAMS ((int *));
 172
 173 extern void
 174 inferior_proc_init PARAMS ((int));
 175
 176 extern void
 177 proc_signal_handling_change PARAMS ((void));
 178
 179 extern void
 180 proc_set_exec_trap PARAMS ((void));
 181
 182 #endif
 183
 184 /* From inflow.c */
 185
 186 extern void
 187 new_tty_prefork PARAMS ((char *));
 188
 189 /* From infrun.c */
 190
 191 extern void
 192 start_remote PARAMS ((void));
 193
 194 extern void
 195 child_create_inferior PARAMS ((char *, char *, char **));
 196
 197 extern void
 198 child_attach PARAMS ((char *, int));
 199
 200 extern void
 201 normal_stop PARAMS ((void));
 202
 203 extern int
 204 signal_stop_state PARAMS ((int));
 205
 206 extern int
 207 signal_print_state PARAMS ((int));
 208
 209 extern int
 210 signal_pass_state PARAMS ((int));
 211
 212 /* From infcmd.c */
 213
 214 extern void
 215 tty_command PARAMS ((char *, int));
 216
 217 extern void
 218 attach_command PARAMS ((char *, int));
 219
 220 /* Last signal that the inferior received (why it stopped).  */
 221
 222 extern int stop_signal;
 223
 224 /* Address at which inferior stopped.  */
 225
 226 extern CORE_ADDR stop_pc;
 227
 228 /* Stack frame when program stopped.  */
 229
 230 extern FRAME_ADDR stop_frame_address;
 231
 232 /* Chain containing status of breakpoint(s) that we have stopped at.  */
 233
 234 extern bpstat stop_bpstat;
 235
 236 /* Flag indicating that a command has proceeded the inferior past the
 237    current breakpoint.  */
 238
 239 extern int breakpoint_proceeded;
 240
 241 /* Nonzero if stopped due to a step command.  */
 242
 243 extern int stop_step;
 244
 245 /* Nonzero if stopped due to completion of a stack dummy routine.  */
 246
 247 extern int stop_stack_dummy;
 248
 249 /* Nonzero if program stopped due to a random (unexpected) signal in
 250    inferior process.  */
 251
 252 extern int stopped_by_random_signal;
 253
 254 /* Range to single step within.
 255    If this is nonzero, respond to a single-step signal
 256    by continuing to step if the pc is in this range.  */
 257
 258 extern CORE_ADDR step_range_start; /* Inclusive */
 259 extern CORE_ADDR step_range_end; /* Exclusive */
 260
 261 /* Stack frame address as of when stepping command was issued.
 262    This is how we know when we step into a subroutine call,
 263    and how to set the frame for the breakpoint used to step out.  */
 264
 265 extern FRAME_ADDR step_frame_address;
 266
 267 /* 1 means step over all subroutine calls.
 268    -1 means step over calls to undebuggable functions.  */
 269
 270 extern int step_over_calls;
 271
 272 /* If stepping, nonzero means step count is > 1
 273    so don't print frame next time inferior stops
 274    if it stops due to stepping.  */
 275
 276 extern int step_multi;
 277
 278 /* Nonzero means expecting a trap and caller will handle it themselves.
 279    It is used after attach, due to attaching to a process;
 280    when running in the shell before the child program has been exec'd;
 281    and when running some kinds of remote stuff (FIXME?).  */
 282
 283 extern int stop_soon_quietly;
 284
 285 /* Nonzero if proceed is being used for a "finish" command or a similar
 286    situation when stop_registers should be saved.  */
 287
 288 extern int proceed_to_finish;
 289
 290 /* Save register contents here when about to pop a stack dummy frame,
 291    if-and-only-if proceed_to_finish is set.
 292    Thus this contains the return value from the called function (assuming
 293    values are returned in a register).  */
 294
 295 extern char stop_registers[REGISTER_BYTES];
 296
 297 /* Nonzero if pc has been changed by the debugger
 298    since the inferior stopped.  */
 299
 300 extern int pc_changed;
 301
 302 /* Nonzero if the child process in inferior_pid was attached rather
 303    than forked.  */
 304
 305 extern int attach_flag;
 306 \f
 307 /* Possible values for CALL_DUMMY_LOCATION.  */
 308 #define ON_STACK 1
 309 #define BEFORE_TEXT_END 2
 310 #define AFTER_TEXT_END 3
 311
 312 #if !defined (CALL_DUMMY_LOCATION)
 313 #define CALL_DUMMY_LOCATION ON_STACK
 314 #endif /* No CALL_DUMMY_LOCATION.  */
 315
 316 /* Are we in a call dummy?  The code below which allows DECR_PC_AFTER_BREAK
 317    below is for infrun.c, which may give the macro a pc without that
 318    subtracted out.  */
 319 #if !defined (PC_IN_CALL_DUMMY)
 320 #if CALL_DUMMY_LOCATION == BEFORE_TEXT_END
 321 extern CORE_ADDR text_end;
 322 #define PC_IN_CALL_DUMMY(pc, sp, frame_address) \
 323   ((pc) >= text_end - CALL_DUMMY_LENGTH         \
 324    && (pc) < text_end + DECR_PC_AFTER_BREAK)
 325 #else /* Not before text_end.  */
 326 #if CALL_DUMMY_LOCATION == AFTER_TEXT_END
 327 extern CORE_ADDR text_end;
 328 #define PC_IN_CALL_DUMMY(pc, sp, frame_address) \
 329   ((pc) >= text_end   \
 330    && (pc) < text_end + CALL_DUMMY_LENGTH + DECR_PC_AFTER_BREAK)
 331 #else /* On stack.  */
 332 #define PC_IN_CALL_DUMMY(pc, sp, frame_address) \
 333   ((sp) INNER_THAN (pc) && (pc) INNER_THAN (frame_address))
 334 #endif /* On stack.  */
 335 #endif /* Not before text_end.  */
 336 #endif /* No PC_IN_CALL_DUMMY.  */
 337
 338 #endif  /* !defined (INFERIOR_H) */