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[PARISC] Add ability for prctl to change unaligned trap behaviour

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Add support for changing unaligned trap behaviour on a
per-thread basis.

Signed-off-by: Kyle McMartin <[email protected]>
This commit is contained in:
Kyle McMartin 2005-10-21 22:43:15 -04:00
commit f053725b89
2 changed files with 29 additions and 6 deletions
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19
include/asm-parisc/processor.h
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@ -122,8 +122,27 @@ struct thread_struct {
};
/* Thread struct flags. */
#define PARISC_UAC_NOPRINT (1UL << 0) /* see prctl and unaligned.c */
#define PARISC_UAC_SIGBUS (1UL << 1)
#define PARISC_KERNEL_DEATH (1UL << 31) /* see die_if_kernel()... */
#define PARISC_UAC_SHIFT 0
#define PARISC_UAC_MASK (PARISC_UAC_NOPRINT|PARISC_UAC_SIGBUS)
#define SET_UNALIGN_CTL(task,value) \
({ \
(task)->thread.flags = (((task)->thread.flags & ~PARISC_UAC_MASK) \
| (((value) << PARISC_UAC_SHIFT) & \
PARISC_UAC_MASK)); \
0; \
})
#define GET_UNALIGN_CTL(task,addr) \
({ \
put_user(((task)->thread.flags & PARISC_UAC_MASK) \
>> PARISC_UAC_SHIFT, (int __user *) (addr)); \
})
#define INIT_THREAD { \
regs: { gr: { 0, }, \
fr: { 0, }, \