diff options
| author | Theo de Raadt <deraadt@cvs.openbsd.org> | 1998-05-10 18:29:50 +0000 |
|---|---|---|
| committer | Theo de Raadt <deraadt@cvs.openbsd.org> | 1998-05-10 18:29:50 +0000 |
| commit | 250408aa4e67fb85dcdb632734d6b1e2dd978de6 (patch) | |
| tree | a48ef93f128c1a04fd115967aa3d8aca19a25102 /sys/arch/i386 | |
| parent | be23bcbacd08115a114fccc4f382a356ab287017 (diff) | |
80386 specific fix for copyoutstr crossing a page boundary; drochner@zelux6.zel.kfa-juelich.de
Diffstat (limited to 'sys/arch/i386')
| -rw-r--r-- | sys/arch/i386/i386/locore.s | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/sys/arch/i386/i386/locore.s b/sys/arch/i386/i386/locore.s index 2bf7c543eb7..1d06b7fd615 100644 --- a/sys/arch/i386/i386/locore.s +++ b/sys/arch/i386/i386/locore.s @@ -1,4 +1,4 @@ -/* $OpenBSD: locore.s,v 1.42 1998/02/26 20:53:23 weingart Exp $ */ +/* $OpenBSD: locore.s,v 1.43 1998/05/10 18:29:49 deraadt Exp $ */ /* $NetBSD: locore.s,v 1.145 1996/05/03 19:41:19 christos Exp $ */ /*- @@ -1018,10 +1018,11 @@ ENTRY(copyoutstr) 2: /* Copy up to end of this page. */ subl %ecx,%edx # predecrement total count - jnc 3f + jnc 6f addl %edx,%ecx # ecx += (edx - ecx) = edx xorl %edx,%edx +6: pushl %eax # save PT index 3: decl %ecx js 4f lodsb @@ -1030,11 +1031,13 @@ ENTRY(copyoutstr) jnz 3b /* Success -- 0 byte reached. */ + addl $4,%esp # discard PT index addl %ecx,%edx # add back residual for this page xorl %eax,%eax jmp copystr_return 4: /* Go to next page, if any. */ + popl %eax # restore PT index movl $NBPG,%ecx incl %eax testl %edx,%edx |