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* procfs.c (proc_set_exec_trap): Under Alpha OSF/1-4.0, tracing

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the entry to the exit system call to detect termination of the
	inferior stopped working. Trace termination of the inferior via
	PRFS_STOPTERM instead.
	(procfs_init_inferior):  Do not trace entry to exit system call
	if PIOCSSPCACT is defined.
	(procfs_wait):  Handle PR_DEAD event, which signals the termination
	of the inferior if PRFS_STOPTERM is set.

	* mdebugread.c (parse_partial_symbols):  Ignore stNil section
	start address symbols.

	* sparc-tdep.c (get_saved_register):  Get saved PC from the
	frame info if not in innermost frame.
This commit is contained in:
Peter Schauer
1996-10-26 14:22:35 +00:00
parent 59f2e5dbeb
commit 1cb1b16cfb
3 changed files with 62 additions and 7 deletions
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36
gdb/procfs.c
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@@ -1818,10 +1818,10 @@ procfs_init_inferior (pid)
pip = create_procinfo (pid);
#ifndef PIOCSSPCACT
procfs_set_syscall_trap (pip, SYS_exit, PROCFS_SYSCALL_ENTRY,
procfs_exit_handler);
#ifndef PRFS_STOPEXEC
#ifdef SYS_exec
procfs_set_syscall_trap (pip, SYS_exec, PROCFS_SYSCALL_EXIT,
procfs_exec_handler);
@@ -1834,7 +1834,7 @@ procfs_init_inferior (pid)
procfs_set_syscall_trap (pip, SYS_execve, PROCFS_SYSCALL_EXIT,
procfs_exec_handler);
#endif
#endif /* PRFS_STOPEXEC */
#endif /* PIOCSSPCACT */
/* Setup traps on exit from sproc() */
@@ -1982,7 +1982,10 @@ proc_set_exec_trap ()
#ifdef PIOCSSPCACT
/* Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace
exits from exec system calls because of the user level loader. */
exits from exec system calls because of the user level loader.
Starting with OSF/1-4.0, tracing the entry to the exit system
call no longer works. So we have to use PRFS_STOPTERM to trace
termination of the inferior. */
{
int prfs_flags;
@@ -1992,7 +1995,7 @@ proc_set_exec_trap ()
gdb_flush (gdb_stderr);
_exit (127);
}
prfs_flags |= PRFS_STOPEXEC;
prfs_flags |= PRFS_STOPEXEC | PRFS_STOPTERM;
if (ioctl (fd, PIOCSSPCACT, &prfs_flags) < 0)
{
perror (procname);
@@ -2000,7 +2003,7 @@ proc_set_exec_trap ()
_exit (127);
}
}
#else
#else /* PIOCSSPCACT */
/* GW: Rationale...
Not all systems with /proc have all the exec* syscalls with the same
names. On the SGI, for example, there is no SYS_exec, but there
@@ -2022,7 +2025,6 @@ proc_set_exec_trap ()
gdb_flush (gdb_stderr);
_exit (127);
}
#endif
praddset (&entryset, SYS_exit);
@@ -2032,6 +2034,7 @@ proc_set_exec_trap ()
gdb_flush (gdb_stderr);
_exit (126);
}
#endif /* PIOCSSPCACT */
/* Turn off inherit-on-fork flag so that all grand-children of gdb
start with tracing flags cleared. */
@@ -2644,6 +2647,27 @@ procfs_wait (pid, ourstatus)
error ("PR_SYSEXIT, unhandled system call %d", what);
}
break;
#ifdef PR_DEAD
case (short)PR_DEAD:
{
int dummy;
/* The inferior process is about to terminate.
pr_what has the process's exit or return value.
A PIOCRUN ioctl must be used to restart the process so it
can finish exiting. */
pi->prrun.pr_flags = PRCFAULT;
if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0)
perror_with_name (pi->pathname);
if (wait (&dummy) < 0)
rtnval = -1;
statval = pi->prstatus.pr_what;
}
break;
#endif
case PR_REQUESTED:
statval = (SIGSTOP << 8) | 0177;
break;