Remove wrong check.

HPPA longjmp tests that the env parameter < the current stack pointer.
The test relies on the stack being at the end of the memory space.

This test is wrong for a couple of reasons:
- the main stack is at 0x78000000-0x80000000, but allocations between
  0x80000000-0xc0000000 are available to the program,
- pthread stacks may be at any place in the address space, allowing a
  heap-allocated env parameter to fail the check.

ok deraadt@, kettenis@, guenther@ at least

1 files changed, 1 insertions, 10 deletions

diff --git a/lib/libc/arch/hppa/gen/setjmp.S b/lib/libc/arch/hppa/gen/setjmp.S
index a4610b51f0f..44077a9c1a5 100644
--- a/lib/libc/arch/hppa/gen/setjmp.S
+++ b/lib/libc/arch/hppa/gen/setjmp.S
@@ -1,4 +1,4 @@
-/*	$OpenBSD: setjmp.S,v 1.7 2005/08/07 16:40:14 espie Exp $	*/
+/*	$OpenBSD: setjmp.S,v 1.8 2011/04/15 21:39:45 ariane Exp $	*/
 
 /*-
  * Copyright (c) 1990 The Regents of the University of California.
@@ -114,9 +114,6 @@ EXIT(_setjmp)
 
 ENTRY(siglongjmp,64)
 	/* XXX have to dup this from below */
-	sub,>>	%sp, %arg0, %r0		/* botch if jbuf was on stack */
-	bl,n	longjmperror, %rp
-	nop
 	ldw	16(%arg0), %r1		/* botch if it's a real signal frame */
 	add,=	%r0, %r1, %r0
 	bl,n	longjmperror, %rp
@@ -129,9 +126,6 @@ ENTRY(siglongjmp,64)
 
 ALTENTRY(longjmp)
 	/* XXX have to dup this from below */
-	sub,>>	%sp, %arg0, %r0		/* botch if jbuf was on stack */
-	bl,n	longjmperror, %rp
-	nop
 	ldw	16(%arg0), %r1		/* botch if it's a real signal frame */
 	add,=	%r0, %r1, %r0
 	bl,n	longjmperror, %rp
@@ -156,9 +150,6 @@ ALTENTRY(longjmp)
 	ldw	HPPA_FRAME_ARG(1)(%sp), %arg1
 
 ALTENTRY(_longjmp)
-	sub,>>	%sp, %arg0, %r0		/* botch if jbuf was on stack */
-	bl,n	longjmperror, %rp
-	nop
 	ldw	16(%arg0), %r1		/* botch if it's a real signal frame */
 	add,=	%r0, %r1, %r0
 	bl,n	longjmperror, %rp