R0dn3yS/android_kernel_xiaomi_sm7250
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

[ARM] 4356/1: arm: fix handling of svc mode undefined instructions

Browse Source 
Now that do_undefinstr handles kernel and user mode undefined
instruction exceptions it must not assume that interrupts are enabled at
entry.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Dan Williams 2007-05-03 00:18:34 +01:00 committed by Russell King
parent f16fb1ecc5
commit 99cce8f7b1
1 changed files with 3 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
arch/arm/kernel/traps.c
View File

@ -286,6 +286,7 @@ asmlinkage void __exception do_undefinstr(struct pt_regs *regs)
struct undef_hook *hook;
siginfo_t info;
void __user *pc;
unsigned long flags;
/*
* According to the ARM ARM, PC is 2 or 4 bytes ahead,
@ -304,7 +305,7 @@ asmlinkage void __exception do_undefinstr(struct pt_regs *regs)
get_user(instr, (u32 __user *)pc);
}
spin_lock_irq(&undef_lock);
spin_lock_irqsave(&undef_lock, flags);
list_for_each_entry(hook, &undef_hook, node) {
if ((instr & hook->instr_mask) == hook->instr_val &&
(regs->ARM_cpsr & hook->cpsr_mask) == hook->cpsr_val) {
@ -314,7 +315,7 @@ asmlinkage void __exception do_undefinstr(struct pt_regs *regs)
}
}
}
spin_unlock_irq(&undef_lock);
spin_unlock_irqrestore(&undef_lock, flags);
#ifdef CONFIG_DEBUG_USER
if (user_debug & UDBG_UNDEFINED) {