diff options
Diffstat (limited to 'arch/sh/mm/alignment.c')
| -rw-r--r-- | arch/sh/mm/alignment.c | 30 |
1 files changed, 29 insertions, 1 deletions
diff --git a/arch/sh/mm/alignment.c b/arch/sh/mm/alignment.c index 00fb9e3f057..b2595b8548e 100644 --- a/arch/sh/mm/alignment.c +++ b/arch/sh/mm/alignment.c @@ -14,6 +14,7 @@ #include <linux/proc_fs.h> #include <linux/uaccess.h> #include <asm/alignment.h> +#include <asm/processor.h> static unsigned long se_user; static unsigned long se_sys; @@ -59,9 +60,36 @@ void inc_unaligned_kernel_access(void) se_sys++; } +/* + * This defaults to the global policy which can be set from the command + * line, while processes can overload their preferences via prctl(). + */ unsigned int unaligned_user_action(void) { - return se_usermode; + unsigned int action = se_usermode; + + if (current->thread.flags & SH_THREAD_UAC_SIGBUS) { + action &= ~UM_FIXUP; + action |= UM_SIGNAL; + } + + if (current->thread.flags & SH_THREAD_UAC_NOPRINT) + action &= ~UM_WARN; + + return action; +} + +int get_unalign_ctl(struct task_struct *tsk, unsigned long addr) +{ + return put_user(tsk->thread.flags & SH_THREAD_UAC_MASK, + (unsigned int __user *)addr); +} + +int set_unalign_ctl(struct task_struct *tsk, unsigned int val) +{ + tsk->thread.flags = (tsk->thread.flags & ~SH_THREAD_UAC_MASK) | + (val & SH_THREAD_UAC_MASK); + return 0; } void unaligned_fixups_notify(struct task_struct *tsk, insn_size_t insn, |