diff options
| author | Jeff Dike <jdike@addtoit.com> | 2006-12-08 02:36:23 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.osdl.org> | 2006-12-08 08:28:39 -0800 |
| commit | e182c965b6ce0dffed0967a1be2173825a2ede2f (patch) | |
| tree | 287d3801dc660b4bc39da08400a68b6ea536e30e /arch/um/sys-i386 | |
| parent | c31a0bf3e1bc581676618db7492f18798fd0a73f (diff) | |
[PATCH] UML: add generic BUG support
The BUG changes in -mm3 need some arch support. This patch adds the UML
support needed. For the most part, it was stolen from the underlying
architecture. The exception is the kernel eip < PAGE_OFFSET test, which is
wrong for skas mode UMLs.
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/um/sys-i386')
| -rw-r--r-- | arch/um/sys-i386/Makefile | 2 | ||||
| -rw-r--r-- | arch/um/sys-i386/bug.c | 20 |
2 files changed, 21 insertions, 1 deletions
diff --git a/arch/um/sys-i386/Makefile b/arch/um/sys-i386/Makefile index 0e32adf03be..098720be019 100644 --- a/arch/um/sys-i386/Makefile +++ b/arch/um/sys-i386/Makefile @@ -1,4 +1,4 @@ -obj-y = bugs.o checksum.o delay.o fault.o ksyms.o ldt.o ptrace.o \ +obj-y = bug.o bugs.o checksum.o delay.o fault.o ksyms.o ldt.o ptrace.o \ ptrace_user.o setjmp.o signal.o sigcontext.o syscalls.o sysrq.o \ sys_call_table.o tls.o diff --git a/arch/um/sys-i386/bug.c b/arch/um/sys-i386/bug.c new file mode 100644 index 00000000000..200c8ba2879 --- /dev/null +++ b/arch/um/sys-i386/bug.c @@ -0,0 +1,20 @@ +/* + * Copyright (C) 2006 Jeff Dike (jdike@addtoit.com) + * Licensed under the GPL V2 + */ + +#include <linux/uaccess.h> + +/* Mostly copied from i386/x86_86 - eliminated the eip < PAGE_OFFSET because + * that's not relevent in skas mode. + */ + +int is_valid_bugaddr(unsigned long eip) +{ + unsigned short ud2; + + if (probe_kernel_address((unsigned short __user *)eip, ud2)) + return 0; + + return ud2 == 0x0b0f; +} |