From 049cdefe19f95b67b06b70915cd8e4ae7173337a Mon Sep 17 00:00:00 2001 From: Jan Beulich Date: Mon, 12 Sep 2005 18:49:25 +0200 Subject: [PATCH] x86-64: reduce x86-64 bug frame by 4 bytes As mentioned before, the size of the bug frame can be further reduced while continuing to use instructions to encode the information. Signed-off-by: Jan Beulich Signed-off-by: Linus Torvalds --- arch/x86_64/kernel/traps.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'arch') diff --git a/arch/x86_64/kernel/traps.c b/arch/x86_64/kernel/traps.c index 1dfeb07d31cc..b5e09e6b5536 100644 --- a/arch/x86_64/kernel/traps.c +++ b/arch/x86_64/kernel/traps.c @@ -321,13 +321,13 @@ void handle_BUG(struct pt_regs *regs) if (__copy_from_user(&f, (struct bug_frame *) regs->rip, sizeof(struct bug_frame))) return; - if ((unsigned long)f.filename < __PAGE_OFFSET || + if (f.filename >= 0 || f.ud2[0] != 0x0f || f.ud2[1] != 0x0b) return; - if (__get_user(tmp, f.filename)) - f.filename = "unmapped filename"; + if (__get_user(tmp, (char *)(long)f.filename)) + f.filename = (int)(long)"unmapped filename"; printk("----------- [cut here ] --------- [please bite here ] ---------\n"); - printk(KERN_ALERT "Kernel BUG at %.50s:%d\n", f.filename, f.line); + printk(KERN_ALERT "Kernel BUG at %.50s:%d\n", (char *)(long)f.filename, f.line); } #ifdef CONFIG_BUG -- cgit v1.2.3-59-g8ed1b