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authorPaolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>2005-09-30 11:59:00 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2005-09-30 12:41:18 -0700
commit8923648c125421b0fcb240cde607e2748d099ab8 (patch)
tree04cbc84071399120ff96061da05659479a46fcff /arch
parentbe662a18b7763496a052d489206af9ca2c2e1ac2 (diff)
[PATCH] uml: clear SKAS0/3 flags when running in TT mode
SEGV_MAYBE_FIXABLE tests ptrace_faultinfo, and depends on it being 1 only in SKAS3 mode, while currently when running with mode=tt it will be 1 anyway. Fix this, and do the same for proc_mm. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/um/include/os.h4
-rw-r--r--arch/um/kernel/um_arch.c2
2 files changed, 6 insertions, 0 deletions
diff --git a/arch/um/include/os.h b/arch/um/include/os.h
index 583329d0a53..6f766e1faec 100644
--- a/arch/um/include/os.h
+++ b/arch/um/include/os.h
@@ -157,6 +157,10 @@ extern int os_lock_file(int fd, int excl);
extern void os_early_checks(void);
extern int can_do_skas(void);
+/* Make sure they are clear when running in TT mode. Required by
+ * SEGV_MAYBE_FIXABLE */
+#define clear_can_do_skas() do { ptrace_faultinfo = proc_mm = 0; } while (0)
+
/* mem.c */
extern int create_mem_file(unsigned long len);
diff --git a/arch/um/kernel/um_arch.c b/arch/um/kernel/um_arch.c
index f0a275947d3..93dc782dc1c 100644
--- a/arch/um/kernel/um_arch.c
+++ b/arch/um/kernel/um_arch.c
@@ -334,6 +334,8 @@ int linux_main(int argc, char **argv)
add_arg(DEFAULT_COMMAND_LINE);
os_early_checks();
+ if (force_tt)
+ clear_can_do_skas();
mode_tt = force_tt ? 1 : !can_do_skas();
#ifndef CONFIG_MODE_TT
if (mode_tt) {