/* Variables that describe the inferior process running under GDB:
Where it is, why it stopped, and how to step it.
- Copyright (C) 1986, 1989 Free Software Foundation, Inc.
+ Copyright 1986, 1989, 1992 Free Software Foundation, Inc.
This file is part of GDB.
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+#if !defined (INFERIOR_H)
+#define INFERIOR_H 1
+
/* For bpstat. */
#include "breakpoint.h"
/* For FRAME_ADDR. */
#include "frame.h"
+/* For enum target_signal. */
+#include "target.h"
+
/*
* Structure in which to save the status of the inferior. Save
* through "save_inferior_status", restore through
* control variables.
*/
struct inferior_status {
- int pc_changed;
- int stop_signal;
- int stop_pc;
+ enum target_signal stop_signal;
+ CORE_ADDR stop_pc;
FRAME_ADDR stop_frame_address;
bpstat stop_bpstat;
int stop_step;
FRAME_ADDR selected_frame_address;
int selected_level;
char stop_registers[REGISTER_BYTES];
+
+ /* These are here because if call_function_by_hand has written some
+ registers and then decides to call error(), we better not have changed
+ any registers. */
+ char registers[REGISTER_BYTES];
+
int breakpoint_proceeded;
int restore_stack_info;
int proceed_to_finish;
};
-void save_inferior_status (), restore_inferior_status ();
+extern void
+save_inferior_status PARAMS ((struct inferior_status *, int));
+
+extern void
+restore_inferior_status PARAMS ((struct inferior_status *));
+
+extern void set_sigint_trap PARAMS ((void));
+extern void clear_sigint_trap PARAMS ((void));
+
+extern void set_sigio_trap PARAMS ((void));
+extern void clear_sigio_trap PARAMS ((void));
/* File name for default use for standard in/out in the inferior. */
extern char registers[];
-extern void clear_proceed_status ();
-extern void start_inferior ();
-extern void proceed ();
-extern void kill_inferior ();
-extern void kill_inferior_fast ();
-extern void generic_mourn_inferior ();
-extern void terminal_ours ();
-extern void detach ();
-extern void run_stack_dummy ();
-extern CORE_ADDR read_pc ();
-extern void write_pc ();
-extern void wait_for_inferior ();
-extern void init_wait_for_inferior ();
-extern void close_exec_file ();
-extern void reopen_exec_file ();
+/* Array of validity bits (one per register). Nonzero at position XXX_REGNUM
+ means that `registers' contains a valid copy of inferior register XXX. */
-/* From infcmd.c */
-void attach_command (
-#ifdef __STDC__
- char *arg, int from_tty
+extern char register_valid[NUM_REGS];
+
+extern void
+clear_proceed_status PARAMS ((void));
+
+extern void
+proceed PARAMS ((CORE_ADDR, enum target_signal, int));
+
+extern void
+kill_inferior PARAMS ((void));
+
+extern void
+generic_mourn_inferior PARAMS ((void));
+
+extern void
+terminal_ours PARAMS ((void));
+
+extern int run_stack_dummy PARAMS ((CORE_ADDR, char [REGISTER_BYTES]));
+
+extern CORE_ADDR
+read_pc PARAMS ((void));
+
+extern CORE_ADDR
+read_pc_pid PARAMS ((int));
+
+extern void
+write_pc PARAMS ((CORE_ADDR));
+
+extern CORE_ADDR
+read_sp PARAMS ((void));
+
+extern void
+write_sp PARAMS ((CORE_ADDR));
+
+extern CORE_ADDR
+read_fp PARAMS ((void));
+
+extern void
+write_fp PARAMS ((CORE_ADDR));
+
+extern void
+wait_for_inferior PARAMS ((void));
+
+extern void
+init_wait_for_inferior PARAMS ((void));
+
+extern void
+close_exec_file PARAMS ((void));
+
+extern void
+reopen_exec_file PARAMS ((void));
+
+/* The `resume' routine should only be called in special circumstances.
+ Normally, use `proceed', which handles a lot of bookkeeping. */
+extern void
+resume PARAMS ((int, enum target_signal));
+
+/* From misc files */
+
+extern void
+store_inferior_registers PARAMS ((int));
+
+extern void
+fetch_inferior_registers PARAMS ((int));
+
+extern void
+solib_create_inferior_hook PARAMS ((void));
+
+extern void
+child_terminal_info PARAMS ((char *, int));
+
+extern void
+term_info PARAMS ((char *, int));
+
+extern void
+terminal_ours_for_output PARAMS ((void));
+
+extern void
+terminal_inferior PARAMS ((void));
+
+extern void
+terminal_init_inferior PARAMS ((void));
+
+/* From infptrace.c */
+
+extern int
+attach PARAMS ((int));
+
+void
+detach PARAMS ((int));
+
+extern void
+child_resume PARAMS ((int, int, enum target_signal));
+
+#ifndef PTRACE_ARG3_TYPE
+#define PTRACE_ARG3_TYPE int /* Correct definition for most systems. */
#endif
- );
-
+
+extern int
+call_ptrace PARAMS ((int, int, PTRACE_ARG3_TYPE, int));
+
+/* From procfs.c */
+
+extern int
+proc_iterate_over_mappings PARAMS ((int (*) (int, CORE_ADDR)));
+
+/* From fork-child.c */
+
+extern void fork_inferior PARAMS ((char *, char *, char **,
+ void (*) (void),
+ void (*) (int), char *));
+
+extern void startup_inferior PARAMS ((int));
+
+/* From inflow.c */
+
+extern void
+new_tty_prefork PARAMS ((char *));
+
+extern int gdb_has_a_terminal PARAMS ((void));
+
+/* From infrun.c */
+
+extern void
+start_remote PARAMS ((void));
+
+extern void
+normal_stop PARAMS ((void));
+
+extern int
+signal_stop_state PARAMS ((int));
+
+extern int
+signal_print_state PARAMS ((int));
+
+extern int
+signal_pass_state PARAMS ((int));
+
+/* From infcmd.c */
+
+extern void
+tty_command PARAMS ((char *, int));
+
+extern void
+attach_command PARAMS ((char *, int));
+
/* Last signal that the inferior received (why it stopped). */
-extern int stop_signal;
+extern enum target_signal stop_signal;
/* Address at which inferior stopped. */
/* Range to single step within.
If this is nonzero, respond to a single-step signal
- by continuing to step if the pc is in this range. */
+ by continuing to step if the pc is in this range.
+
+ If step_range_start and step_range_end are both 1, it means to step for
+ a single instruction (FIXME: it might clean up wait_for_inferior in a
+ minor way if this were changed to the address of the instruction and
+ that address plus one. But maybe not.). */
extern CORE_ADDR step_range_start; /* Inclusive */
extern CORE_ADDR step_range_end; /* Exclusive */
when running in the shell before the child program has been exec'd;
and when running some kinds of remote stuff (FIXME?). */
-int stop_soon_quietly;
+extern int stop_soon_quietly;
/* Nonzero if proceed is being used for a "finish" command or a similar
situation when stop_registers should be saved. */
extern char stop_registers[REGISTER_BYTES];
-/* Nonzero if pc has been changed by the debugger
- since the inferior stopped. */
-
-extern int pc_changed;
-
/* Nonzero if the child process in inferior_pid was attached rather
than forked. */
-int attach_flag;
+extern int attach_flag;
+\f
+/* Sigtramp is a routine that the kernel calls (which then calls the
+ signal handler). On most machines it is a library routine that
+ is linked into the executable.
+
+ This macro, given a program counter value and the name of the
+ function in which that PC resides (which can be null if the
+ name is not known), returns nonzero if the PC and name show
+ that we are in sigtramp.
+
+ On most machines just see if the name is sigtramp (and if we have
+ no name, assume we are not in sigtramp). */
+#if !defined (IN_SIGTRAMP)
+# if defined (SIGTRAMP_START)
+# define IN_SIGTRAMP(pc, name) \
+ ((pc) >= SIGTRAMP_START \
+ && (pc) < SIGTRAMP_END \
+ )
+# else
+# define IN_SIGTRAMP(pc, name) \
+ (name && STREQ ("_sigtramp", name))
+# endif
+#endif
\f
/* Possible values for CALL_DUMMY_LOCATION. */
#define ON_STACK 1
#define BEFORE_TEXT_END 2
#define AFTER_TEXT_END 3
+#define AT_ENTRY_POINT 4
#if !defined (CALL_DUMMY_LOCATION)
-#if defined (CANNOT_EXECUTE_STACK)
-#define CALL_DUMMY_LOCATION BEFORE_TEXT_END
-#else /* Can execute stack. */
#define CALL_DUMMY_LOCATION ON_STACK
-#endif /* Can execute stack. */
#endif /* No CALL_DUMMY_LOCATION. */
/* Are we in a call dummy? The code below which allows DECR_PC_AFTER_BREAK
subtracted out. */
#if !defined (PC_IN_CALL_DUMMY)
#if CALL_DUMMY_LOCATION == BEFORE_TEXT_END
+extern CORE_ADDR text_end;
#define PC_IN_CALL_DUMMY(pc, sp, frame_address) \
((pc) >= text_end - CALL_DUMMY_LENGTH \
- && (pc) < text_end + DECR_PC_AFTER_BREAK)
-#else /* Not before text_end. */
+ && (pc) <= text_end + DECR_PC_AFTER_BREAK)
+#endif /* Before text_end. */
+
#if CALL_DUMMY_LOCATION == AFTER_TEXT_END
+extern CORE_ADDR text_end;
#define PC_IN_CALL_DUMMY(pc, sp, frame_address) \
((pc) >= text_end \
- && (pc) < text_end + CALL_DUMMY_LENGTH + DECR_PC_AFTER_BREAK)
-#else /* On stack. */
+ && (pc) <= text_end + CALL_DUMMY_LENGTH + DECR_PC_AFTER_BREAK)
+#endif /* After text_end. */
+
+#if CALL_DUMMY_LOCATION == ON_STACK
+/* Is the PC in a call dummy? SP and FRAME_ADDRESS are the bottom and
+ top of the stack frame which we are checking, where "bottom" and
+ "top" refer to some section of memory which contains the code for
+ the call dummy. Calls to this macro assume that the contents of
+ SP_REGNUM and FP_REGNUM (or the saved values thereof), respectively,
+ are the things to pass.
+
+ This won't work on the 29k, where SP_REGNUM and FP_REGNUM don't
+ have that meaning, but the 29k doesn't use ON_STACK. This could be
+ fixed by generalizing this scheme, perhaps by passing in a frame
+ and adding a few fields, at least on machines which need them for
+ PC_IN_CALL_DUMMY.
+
+ Something simpler, like checking for the stack segment, doesn't work,
+ since various programs (threads implementations, gcc nested function
+ stubs, etc) may either allocate stack frames in another segment, or
+ allocate other kinds of code on the stack. */
+
#define PC_IN_CALL_DUMMY(pc, sp, frame_address) \
- ((sp) INNER_THAN (pc) && (pc) INNER_THAN (frame_address))
+ ((sp) INNER_THAN (pc) && (frame_address != 0) && (pc) INNER_THAN (frame_address))
#endif /* On stack. */
-#endif /* Not before text_end. */
+
+#if CALL_DUMMY_LOCATION == AT_ENTRY_POINT
+#define PC_IN_CALL_DUMMY(pc, sp, frame_address) \
+ ((pc) >= CALL_DUMMY_ADDRESS () \
+ && (pc) <= (CALL_DUMMY_ADDRESS () + DECR_PC_AFTER_BREAK))
+#endif /* At entry point. */
#endif /* No PC_IN_CALL_DUMMY. */
+
+#endif /* !defined (INFERIOR_H) */
projects / binutils.git / blobdiff