/* Variables that describe the inferior process running under GDB:
Where it is, why it stopped, and how to step it.
- Copyright 1986, 1989, 1992 Free Software Foundation, Inc.
+ Copyright 1986, 1989, 1992, 1996 Free Software Foundation, Inc.
This file is part of GDB.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
-Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#if !defined (INFERIOR_H)
#define INFERIOR_H 1
-/* For symtab_and_line */
-#include "symtab.h"
-
/* For bpstat. */
#include "breakpoint.h"
-/* For FRAME_ADDR. */
-#include "frame.h"
-
-/*
- * Structure in which to save the status of the inferior. Save
- * through "save_inferior_status", restore through
- * "restore_inferior_status".
- * This pair of routines should be called around any transfer of
- * control to the inferior which you don't want showing up in your
- * control variables.
- */
+/* For enum target_signal. */
+#include "target.h"
+
+/* Structure in which to save the status of the inferior. Save
+ through "save_inferior_status", restore through
+ "restore_inferior_status".
+ This pair of routines should be called around any transfer of
+ control to the inferior which you don't want showing up in your
+ control variables. */
+
struct inferior_status {
- int pc_changed;
- int stop_signal;
- int stop_pc;
- FRAME_ADDR stop_frame_address;
+ enum target_signal stop_signal;
+ CORE_ADDR stop_pc;
bpstat stop_bpstat;
int stop_step;
int stop_stack_dummy;
int trap_expected;
CORE_ADDR step_range_start;
CORE_ADDR step_range_end;
- FRAME_ADDR step_frame_address;
+ CORE_ADDR step_frame_address;
int step_over_calls;
CORE_ADDR step_resume_break_address;
int stop_after_trap;
int stop_soon_quietly;
- FRAME_ADDR selected_frame_address;
+ CORE_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;
};
-extern void
-save_inferior_status PARAMS ((struct inferior_status *, int));
+/* This macro gives the number of registers actually in use by the
+ inferior. This may be less than the total number of registers,
+ perhaps depending on the actual CPU in use or program being run. */
+
+#ifndef ARCH_NUM_REGS
+#define ARCH_NUM_REGS NUM_REGS
+#endif
+
+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
-restore_inferior_status PARAMS ((struct inferior_status *));
+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 int inferior_pid;
+/* Inferior environment. */
+
+extern struct environ *inferior_environ;
+
/* Character array containing an image of the inferior programs' registers. */
extern char registers[];
extern char register_valid[NUM_REGS];
-extern void
-clear_proceed_status PARAMS ((void));
+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 void
-proceed PARAMS ((CORE_ADDR, int, int));
+extern CORE_ADDR read_pc PARAMS ((void));
-extern void
-kill_inferior PARAMS ((void));
+extern CORE_ADDR read_pc_pid PARAMS ((int));
-extern void
-generic_mourn_inferior PARAMS ((void));
+extern void write_pc PARAMS ((CORE_ADDR));
-extern void
-terminal_ours PARAMS ((void));
+extern CORE_ADDR read_sp PARAMS ((void));
-extern void
-run_stack_dummy PARAMS ((CORE_ADDR, char [REGISTER_BYTES]));
+extern void write_sp PARAMS ((CORE_ADDR));
-extern CORE_ADDR
-read_pc PARAMS ((void));
+extern CORE_ADDR read_fp PARAMS ((void));
-extern void
-write_pc PARAMS ((CORE_ADDR));
+extern void write_fp PARAMS ((CORE_ADDR));
-extern void
-wait_for_inferior PARAMS ((void));
+extern void wait_for_inferior PARAMS ((void));
-extern void
-init_wait_for_inferior PARAMS ((void));
+extern void init_wait_for_inferior PARAMS ((void));
-extern void
-close_exec_file PARAMS ((void));
+extern void close_exec_file PARAMS ((void));
-extern void
-reopen_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, int));
+
+extern void resume PARAMS ((int, enum target_signal));
/* From misc files */
-extern void
-store_inferior_registers PARAMS ((int));
+extern void store_inferior_registers PARAMS ((int));
+
+extern void fetch_inferior_registers PARAMS ((int));
-extern void
-fetch_inferior_registers PARAMS ((int));
+extern void solib_create_inferior_hook PARAMS ((void));
-extern void
-solib_create_inferior_hook PARAMS ((void));
+extern void child_terminal_info PARAMS ((char *, int));
-extern void
-child_terminal_info PARAMS ((char *, int));
+extern void term_info PARAMS ((char *, int));
-extern void
-term_info PARAMS ((char *, int));
+extern void terminal_ours_for_output PARAMS ((void));
-extern void
-terminal_ours_for_output PARAMS ((void));
+extern void terminal_inferior PARAMS ((void));
-extern void
-terminal_inferior PARAMS ((void));
+extern void terminal_init_inferior PARAMS ((void));
-extern void
-terminal_init_inferior PARAMS ((void));
+#ifdef PROCESS_GROUP_TYPE
+extern void terminal_init_inferior_with_pgrp PARAMS ((PROCESS_GROUP_TYPE pgrp));
+#endif
/* From infptrace.c */
-extern int
-attach PARAMS ((int));
+extern int attach PARAMS ((int));
-void
-detach PARAMS ((int));
+void detach PARAMS ((int));
-extern void
-child_resume PARAMS ((int, 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));
+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)));
-
-extern void
-proc_signal_handling_change PARAMS ((void));
+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)));
+extern void fork_inferior PARAMS ((char *, char *, char **,
+ void (*) (void),
+ int (*) (int), char *));
+
+extern void startup_inferior PARAMS ((int));
/* From inflow.c */
-extern void
-new_tty_prefork PARAMS ((char *));
+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 start_remote PARAMS ((void));
-extern void
-normal_stop PARAMS ((void));
+extern void normal_stop PARAMS ((void));
-extern int
-signal_stop_state PARAMS ((int));
+extern int signal_stop_state PARAMS ((int));
-extern int
-signal_print_state PARAMS ((int));
+extern int signal_print_state PARAMS ((int));
-extern int
-signal_pass_state PARAMS ((int));
+extern int signal_pass_state PARAMS ((int));
/* From infcmd.c */
-extern void
-tty_command PARAMS ((char *, int));
+extern void tty_command PARAMS ((char *, int));
-extern void
-attach_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. */
extern CORE_ADDR stop_pc;
-/* Stack frame when program stopped. */
-
-extern FRAME_ADDR stop_frame_address;
-
/* Chain containing status of breakpoint(s) that we have stopped at. */
extern bpstat stop_bpstat;
/* 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 */
This is how we know when we step into a subroutine call,
and how to set the frame for the breakpoint used to step out. */
-extern FRAME_ADDR step_frame_address;
+extern CORE_ADDR step_frame_address;
+
+/* Our notion of the current stack pointer. */
+
+extern CORE_ADDR step_sp;
/* 1 means step over all subroutine calls.
-1 means step over calls to undebuggable functions. */
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. */
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)
#define CALL_DUMMY_LOCATION ON_STACK
#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. */
+#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. */
+#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) */
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