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* hurd/hurdsig.c (_hurd_internal_post_signal): When normal rules would

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ignore a signal that came from a machine exception, treat it as a
	fatal core-dump signal instead.
	Reported by Samuel Thibault <samuel.thibault@ens-lyon.org>.
This commit is contained in:
Roland McGrath
2008-03-08 21:47:27 +00:00
parent a8fd84d450
commit 2b965f1b4e
2 changed files with 13 additions and 1 deletions
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5
ChangeLog
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@@ -1,5 +1,10 @@
2008-03-08 Roland McGrath <roland@frob.com> 2008-03-08 Roland McGrath <roland@frob.com>
* hurd/hurdsig.c (_hurd_internal_post_signal): When normal rules would
ignore a signal that came from a machine exception, treat it as a
fatal core-dump signal instead.
Reported by Samuel Thibault <samuel.thibault@ens-lyon.org>.
* sysdeps/mach/hurd/i386/trampoline.c (_hurd_setup_sighandler): * sysdeps/mach/hurd/i386/trampoline.c (_hurd_setup_sighandler):
Clear DF bit in thread state's eflags. Clear DF bit in thread state's eflags.
Reported by Samuel Thibault <samuel.thibault@ens-lyon.org>. Reported by Samuel Thibault <samuel.thibault@ens-lyon.org>.

9
hurd/hurdsig.c
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@@ -1,4 +1,4 @@
/* Copyright (C) 1991,92,1993,1994,1995,1996,1997,1998,1999,2000,2001,2002,2005 /* Copyright (C) 1991,92,93,94,95,96,97,98,99,2000,2001,2002,2005,2008
Free Software Foundation, Inc. Free Software Foundation, Inc.
This file is part of the GNU C Library. This file is part of the GNU C Library.
@@ -743,6 +743,11 @@ _hurd_internal_post_signal (struct hurd_sigstate *ss,
break; break;
case ignore: case ignore:
if (detail->exc)
/* Blocking or ignoring a machine exception is fatal.
Otherwise we could just spin on the faulting instruction. */
goto fatal;
/* Nobody cares about this signal. If there was a call to resume /* Nobody cares about this signal. If there was a call to resume
above in SIGCONT processing and we've left a thread suspended, above in SIGCONT processing and we've left a thread suspended,
now's the time to set it going. */ now's the time to set it going. */
@@ -759,6 +764,8 @@ _hurd_internal_post_signal (struct hurd_sigstate *ss,
Nothing to do but die; BSD gets SIGILL in this case. */ Nothing to do but die; BSD gets SIGILL in this case. */
detail->code = signo; /* XXX ? */ detail->code = signo; /* XXX ? */
signo = SIGILL; signo = SIGILL;
fatal:
act = core; act = core;
/* FALLTHROUGH */ /* FALLTHROUGH */