[SPARC64]: Durrrr, missed signal handling fix from 2.4.x

Passing sigcontext info in UREG_I2, as needed.
I only spotted this because I was diffing 2.4.x
and 2.6.x sparc64 code.
Signed-off-by: David S. Miller <davem@redhat.com>

arch/sparc/kernel/signal.c

@@ -635,6 +635,7 @@ new_setup_frame(struct k_sigaction *ka, struct pt_regs *regs,
 	regs->u_regs[UREG_FP] = (unsigned long) sf;
 	regs->u_regs[UREG_I0] = signo;
 	regs->u_regs[UREG_I1] = (unsigned long) &sf->info;
+	regs->u_regs[UREG_I2] = (unsigned long) &sf->info;
 
 	/* 4. signal handler */
 	regs->pc = (unsigned long) ka->sa.sa_handler;
@@ -719,6 +720,7 @@ new_setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
 	regs->u_regs[UREG_FP] = (unsigned long) sf;
 	regs->u_regs[UREG_I0] = signo;
 	regs->u_regs[UREG_I1] = (unsigned long) &sf->info;
+	regs->u_regs[UREG_I2] = (unsigned long) &sf->regs;
 
 	regs->pc = (unsigned long) ka->sa.sa_handler;
 	regs->npc = (regs->pc + 4);

arch/sparc64/kernel/signal.c

@@ -545,6 +545,12 @@ setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
 	regs->u_regs[UREG_I0] = signo;
 	regs->u_regs[UREG_I1] = (unsigned long) &sf->info;
 
+	/* The sigcontext is passed in this way because of how it
+	 * is defined in GLIBC's /usr/include/bits/sigcontext.h
+	 * for sparc64.  It includes the 128 bytes of siginfo_t.
+	 */
+	regs->u_regs[UREG_I2] = (unsigned long) &sf->info;
+
 	/* 5. signal handler */
 	regs->tpc = (unsigned long) ka->sa.sa_handler;
 	regs->tnpc = (regs->tpc + 4);

arch/sparc64/kernel/signal32.c

@@ -749,6 +749,7 @@ static void new_setup_frame32(struct k_sigaction *ka, struct pt_regs *regs,
 	regs->u_regs[UREG_FP] = (unsigned long) sf;
 	regs->u_regs[UREG_I0] = signo;
 	regs->u_regs[UREG_I1] = (unsigned long) &sf->info;
+	regs->u_regs[UREG_I2] = (unsigned long) &sf->info;
 
 	/* 4. signal handler */
 	regs->tpc = (unsigned long) ka->sa.sa_handler;
@@ -1157,6 +1158,7 @@ static void setup_rt_frame32(struct k_sigaction *ka, struct pt_regs *regs,
 	regs->u_regs[UREG_FP] = (unsigned long) sf;
 	regs->u_regs[UREG_I0] = signr;
 	regs->u_regs[UREG_I1] = (unsigned long) &sf->info;
+	regs->u_regs[UREG_I2] = (unsigned long) &sf->regs;
 
 	/* 4. signal handler */
 	regs->tpc = (unsigned long) ka->sa.sa_handler;