diff options
Diffstat (limited to 'sysdeps/mach')
| -rw-r--r-- | sysdeps/mach/hurd/i386/sigreturn.c | 6 | ||||
| -rw-r--r-- | sysdeps/mach/hurd/i386/trampoline.c | 20 |
2 files changed, 26 insertions, 0 deletions
diff --git a/sysdeps/mach/hurd/i386/sigreturn.c b/sysdeps/mach/hurd/i386/sigreturn.c index 19ba1d472c..d00fa7755f 100644 --- a/sysdeps/mach/hurd/i386/sigreturn.c +++ b/sysdeps/mach/hurd/i386/sigreturn.c @@ -28,6 +28,7 @@ int __sigreturn (struct sigcontext *scp) { struct hurd_sigstate *ss; + struct hurd_userlink *link = (void *) &scp[1]; mach_port_t *reply_port; if (scp == NULL || (scp->sc_mask & _SIG_CANT_MASK)) @@ -39,6 +40,11 @@ __sigreturn (struct sigcontext *scp) ss = _hurd_self_sigstate (); __spin_lock (&ss->lock); + /* Remove the link on the `active resources' chain added by + _hurd_setup_sighandler. Its purpose was to make sure + that we got called; now we have, it is done. */ + _hurd_userlink_unlink (link); + /* Restore the set of blocked signals, and the intr_port slot. */ ss->blocked = scp->sc_mask; ss->intr_port = scp->sc_intr_port; diff --git a/sysdeps/mach/hurd/i386/trampoline.c b/sysdeps/mach/hurd/i386/trampoline.c index a83a8a8e7d..5f3361b97e 100644 --- a/sysdeps/mach/hurd/i386/trampoline.c +++ b/sysdeps/mach/hurd/i386/trampoline.c @@ -18,6 +18,7 @@ not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include <hurd/signal.h> +#include <hurd/userlink.h> #include "thread_state.h" #include <assert.h> #include <errno.h> @@ -55,6 +56,7 @@ _hurd_setup_sighandler (struct hurd_sigstate *ss, __sighandler_t handler, void *sigreturn_returns_here; struct sigcontext *return_scp; /* Same; arg to sigreturn. */ struct sigcontext ctx; + struct hurd_userlink link; } *stackframe; if (ss->context) @@ -118,6 +120,24 @@ _hurd_setup_sighandler (struct hurd_sigstate *ss, __sighandler_t handler, { int ok; + extern void _hurdsig_longjmp_from_handler (void *, jmp_buf, int); + + /* Add a link to the thread's active-resources list. We mark this as + the only user of the "resource", so the cleanup function will be + called by any longjmp which is unwinding past the signal frame. + The cleanup function (in sigunwind.c) will make sure that all the + appropriate cleanups done by sigreturn are taken care of. */ + stackframe->link.cleanup = &_hurdsig_longjmp_from_handler; + stackframe->link.cleanup_data = &stackframe->ctx; + stackframe->link.resource.next = NULL; + stackframe->link.resource.prevp = NULL; + stackframe->link.thread.next = ss->active_resources; + stackframe->link.thread.prevp = &ss->active_resources; + if (stackframe->link.thread.next) + stackframe->link.thread.next->thread.prevp + = &stackframe->link.thread.next; + ss->active_resources = &stackframe->link; + /* Set up the arguments for the signal handler. */ stackframe->signo = signo; stackframe->sigcode = sigcode; |