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sh: wire up SET/GET_UNALIGN_CTL.

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This hooks up the SET/GET_UNALIGN_CTL knobs cribbing the bulk of it from
the PPC and ia64 implementations. The thread flags happen to be the
logical inverse of what the global fault mode is set to, so this works
out pretty cleanly. By default the global fault mode is used, with tasks
now being able to override their own settings via prctl().

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt 2010-02-23 12:56:30 +09:00
parent 7c1b2c6890
commit 94ea5e449a
4 changed files with 51 additions and 2 deletions
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6
arch/sh/include/asm/processor_32.h
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@ -101,8 +101,11 @@ struct thread_struct {
unsigned long sp;
unsigned long pc;
/* Various thread flags, see SH_THREAD_xxx */
unsigned long flags;
/* Save middle states of ptrace breakpoints */
struct perf_event *ptrace_bps[HBP_NUM];
struct perf_event *ptrace_bps[HBP_NUM];
#ifdef CONFIG_SH_DSP
/* Dsp status information */
@ -115,6 +118,7 @@ struct thread_struct {
#define INIT_THREAD { \
.sp = sizeof(init_stack) + (long) &init_stack, \
.flags = 0, \
}
/* Forward declaration, a strange C thing */