sh: wire up SET/GET_UNALIGN_CTL.

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>

1 files changed, 12 insertions, 0 deletions

diff --git a/arch/sh/include/asm/processor.h b/arch/sh/include/asm/processor.h
index 87a8d1ef64e4..9605e062840f 100644
--- a/arch/sh/include/asm/processor.h
+++ b/arch/sh/include/asm/processor.h
@@ -107,6 +107,13 @@ extern unsigned int xstate_size;
 extern void free_thread_xstate(struct task_struct *);
 extern struct kmem_cache *task_xstate_cachep;
 
+/* arch/sh/mm/alignment.c */
+extern int get_unalign_ctl(struct task_struct *, unsigned long addr);
+extern int set_unalign_ctl(struct task_struct *, unsigned int val);
+
+#define GET_UNALIGN_CTL(tsk, addr)      get_unalign_ctl((tsk), (addr))
+#define SET_UNALIGN_CTL(tsk, val)       set_unalign_ctl((tsk), (val))
+
 /* arch/sh/mm/init.c */
 extern unsigned int mem_init_done;
 
@@ -114,6 +121,11 @@ extern unsigned int mem_init_done;
 const char *get_cpu_subtype(struct sh_cpuinfo *c);
 extern const struct seq_operations cpuinfo_op;
 
+/* thread_struct flags */
+#define SH_THREAD_UAC_NOPRINT   (1 << 0)
+#define SH_THREAD_UAC_SIGBUS    (1 << 1)
+#define SH_THREAD_UAC_MASK      (SH_THREAD_UAC_NOPRINT | SH_THREAD_UAC_SIGBUS)
+
 /* processor boot mode configuration */
 #define MODE_PIN0 (1 << 0)
 #define MODE_PIN1 (1 << 1)