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ARM: 7319/1: Print debug info for SIGBUS in user faults

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Print debug information on user faults for SIGBUS if user_debug = 16
in the kernel command line.

Reference: <1327333344-26340-1-git-send-email-javi.merino@arm.com>

Signed-off-by: Javi Merino <javi.merino@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Javi Merino 2012-02-06 15:45:36 +01:00 • committed by Russell King
parent e0b823e9a5
commit f5274c2d0d
1 changed files with 2 additions and 1 deletions
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3
arch/arm/mm/fault.c
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@ -164,7 +164,8 @@ __do_user_fault(struct task_struct *tsk, unsigned long addr,
struct siginfo si; struct siginfo si;
#ifdef CONFIG_DEBUG_USER #ifdef CONFIG_DEBUG_USER
if (user_debug & UDBG_SEGV) { if (((user_debug & UDBG_SEGV) && (sig == SIGSEGV)) ||
((user_debug & UDBG_BUS) && (sig == SIGBUS))) {
printk(KERN_DEBUG "%s: unhandled page fault (%d) at 0x%08lx, code 0x%03x\n", printk(KERN_DEBUG "%s: unhandled page fault (%d) at 0x%08lx, code 0x%03x\n",
tsk->comm, sig, addr, fsr); tsk->comm, sig, addr, fsr);
show_pte(tsk->mm, addr); show_pte(tsk->mm, addr);