[SPARC64]: Save/restore %asi properly in signal handling.

Signed-off-by: David S. Miller <davem@redhat.com>

arch/sparc64/kernel/signal.c

@@ -84,8 +84,8 @@ asmlinkage void sparc64_set_context(struct pt_regs *regs)
 	regs->tnpc = npc;
 	err |= __get_user(regs->y, &((*grp)[MC_Y]));
 	err |= __get_user(tstate, &((*grp)[MC_TSTATE]));
-	regs->tstate &= ~(TSTATE_ICC | TSTATE_XCC);
-	regs->tstate |= (tstate & (TSTATE_ICC | TSTATE_XCC));
+	regs->tstate &= ~(TSTATE_ASI | TSTATE_ICC | TSTATE_XCC);
+	regs->tstate |= (tstate & (TSTATE_ASI | TSTATE_ICC | TSTATE_XCC));
 	err |= __get_user(regs->u_regs[UREG_G1], (&(*grp)[MC_G1]));
 	err |= __get_user(regs->u_regs[UREG_G2], (&(*grp)[MC_G2]));
 	err |= __get_user(regs->u_regs[UREG_G3], (&(*grp)[MC_G3]));
@@ -408,9 +408,9 @@ void do_rt_sigreturn(struct pt_regs *regs)
 	err |= __get_user(tstate, &sf->regs.tstate);
 	err |= copy_from_user(regs->u_regs, sf->regs.u_regs, sizeof(regs->u_regs));
 
-	/* User can only change condition codes in %tstate. */
-	regs->tstate &= ~(TSTATE_ICC | TSTATE_XCC);
-	regs->tstate |= (tstate & (TSTATE_ICC | TSTATE_XCC));
+	/* User can only change condition codes and %asi in %tstate. */
+	regs->tstate &= ~(TSTATE_ASI | TSTATE_ICC | TSTATE_XCC);
+	regs->tstate |= (tstate & (TSTATE_ASI | TSTATE_ICC | TSTATE_XCC));
 
 	err |= __get_user(fpu_save, &sf->fpu_save);
 	if (fpu_save)

arch/sparc64/kernel/signal32.c

@@ -59,6 +59,16 @@ struct signal_sframe32 {
 	unsigned int extramask[_COMPAT_NSIG_WORDS - 1];
 };
 
+/* This magic should be in g_upper[0] for all upper parts
+ * to be valid.
+ */
+#define SIGINFO_EXTRA_V8PLUS_MAGIC	0x130e269
+typedef struct {
+	unsigned int g_upper[8];
+	unsigned int o_upper[8];
+	unsigned int asi;
+} siginfo_extra_v8plus_t;
+
 /* 
  * And the new one, intended to be used for Linux applications only
  * (we have enough in there to work with clone).
@@ -299,8 +309,13 @@ void do_new_sigreturn32(struct pt_regs *regs)
 	if ((psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS) {
 		err |= __get_user(i, &sf->v8plus.g_upper[0]);
 		if (i == SIGINFO_EXTRA_V8PLUS_MAGIC) {
+			unsigned long asi;
+
 			for (i = UREG_G1; i <= UREG_I7; i++)
 				err |= __get_user(((u32 *)regs->u_regs)[2*i], &sf->v8plus.g_upper[i]);
+			err |= __get_user(asi, &sf->v8plus.asi);
+			regs->tstate &= ~TSTATE_ASI;
+			regs->tstate |= ((asi & 0xffUL) << 24UL);
 		}
 	}
 
@@ -447,8 +462,13 @@ asmlinkage void do_rt_sigreturn32(struct pt_regs *regs)
 	if ((psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS) {
 		err |= __get_user(i, &sf->v8plus.g_upper[0]);
 		if (i == SIGINFO_EXTRA_V8PLUS_MAGIC) {
+			unsigned long asi;
+
 			for (i = UREG_G1; i <= UREG_I7; i++)
 				err |= __get_user(((u32 *)regs->u_regs)[2*i], &sf->v8plus.g_upper[i]);
+			err |= __get_user(asi, &sf->v8plus.asi);
+			regs->tstate &= ~TSTATE_ASI;
+			regs->tstate |= ((asi & 0xffUL) << 24UL);
 		}
 	}
 
@@ -715,7 +735,10 @@ static void new_setup_frame32(struct k_sigaction *ka, struct pt_regs *regs,
 	err |= __put_user(sizeof(siginfo_extra_v8plus_t), &sf->extra_size);
 	err |= __put_user(SIGINFO_EXTRA_V8PLUS_MAGIC, &sf->v8plus.g_upper[0]);
 	for (i = 1; i < 16; i++)
-		err |= __put_user(((u32 *)regs->u_regs)[2*i], &sf->v8plus.g_upper[i]);
+		err |= __put_user(((u32 *)regs->u_regs)[2*i],
+				  &sf->v8plus.g_upper[i]);
+	err |= __put_user((regs->tstate & TSTATE_ASI) >> 24UL,
+			  &sf->v8plus.asi);
 
 	if (psr & PSR_EF) {
 		err |= save_fpu_state32(regs, &sf->fpu_state);
@@ -1120,6 +1143,8 @@ static void setup_rt_frame32(struct k_sigaction *ka, struct pt_regs *regs,
 	for (i = 1; i < 16; i++)
 		err |= __put_user(((u32 *)regs->u_regs)[2*i],
 				  &sf->v8plus.g_upper[i]);
+	err |= __put_user((regs->tstate & TSTATE_ASI) >> 24UL,
+			  &sf->v8plus.asi);
 
 	if (psr & PSR_EF) {
 		err |= save_fpu_state32(regs, &sf->fpu_state);

include/asm-sparc/sigcontext.h

@@ -57,20 +57,6 @@ typedef struct {
 	} si_fpqueue [16];
 } __siginfo_fpu_t;
 
-#ifdef __KERNEL__
-
-/* This magic should be in g_upper[0] for all upper parts
-   to be valid.
-   This is generated by sparc64 only, but for 32bit processes,
-   so we define it here as well.  */
-#define SIGINFO_EXTRA_V8PLUS_MAGIC      0x130e269
-typedef struct {
-	unsigned   int g_upper[8];
-	unsigned   int o_upper[8];
-} siginfo_extra_v8plus_t;
-
-#endif
-
 #endif /* !(__ASSEMBLY__) */
 
 #endif /* !(__SPARC_SIGCONTEXT_H) */

include/asm-sparc64/sigcontext.h

@@ -83,18 +83,6 @@ struct sigcontext {
 	unsigned long		sigc_mask;
 };
 
-#ifdef __KERNEL__
-
-/* This magic should be in g_upper[0] for all upper parts
-   to be valid.  */
-#define SIGINFO_EXTRA_V8PLUS_MAGIC	0x130e269
-typedef struct {
-	unsigned   int g_upper[8];
-	unsigned   int o_upper[8];
-} siginfo_extra_v8plus_t;
-
-#endif
-
 #endif /* !(__ASSEMBLY__) */
 
 #endif /* !(__SPARC64_SIGCONTEXT_H) */