ARC: Make way for pt_regs != user_regs_struct

These have been register compatible so far. However ARCv2 mandates
different pt_regs layout (due to h/w auto save). To keep pt_regs same
for both, we start by removing the assumption - used mainly for block
copies between the 2 structs in signal handling and ptrace

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>

1 files changed, 83 insertions, 7 deletions

diff --git a/arch/arc/kernel/ptrace.c b/arch/arc/kernel/ptrace.c
index 13b3ffb27a38..4dd9e3a8c2da 100644
--- a/arch/arc/kernel/ptrace.c
+++ b/arch/arc/kernel/ptrace.c
@@ -47,10 +47,47 @@ static int genregs_get(struct task_struct *target,
 			offsetof(struct user_regs_struct, LOC) + 4);
 
 	REG_O_ZERO(pad);
-	REG_O_CHUNK(scratch, callee, ptregs);
+	REG_O_ONE(scratch.bta, &ptregs->bta);
+	REG_O_ONE(scratch.lp_start, &ptregs->lp_start);
+	REG_O_ONE(scratch.lp_end, &ptregs->lp_end);
+	REG_O_ONE(scratch.lp_count, &ptregs->lp_count);
+	REG_O_ONE(scratch.status32, &ptregs->status32);
+	REG_O_ONE(scratch.ret, &ptregs->ret);
+	REG_O_ONE(scratch.blink, &ptregs->blink);
+	REG_O_ONE(scratch.fp, &ptregs->fp);
+	REG_O_ONE(scratch.gp, &ptregs->r26);
+	REG_O_ONE(scratch.r12, &ptregs->r12);
+	REG_O_ONE(scratch.r11, &ptregs->r11);
+	REG_O_ONE(scratch.r10, &ptregs->r10);
+	REG_O_ONE(scratch.r9, &ptregs->r9);
+	REG_O_ONE(scratch.r8, &ptregs->r8);
+	REG_O_ONE(scratch.r7, &ptregs->r7);
+	REG_O_ONE(scratch.r6, &ptregs->r6);
+	REG_O_ONE(scratch.r5, &ptregs->r5);
+	REG_O_ONE(scratch.r4, &ptregs->r4);
+	REG_O_ONE(scratch.r3, &ptregs->r3);
+	REG_O_ONE(scratch.r2, &ptregs->r2);
+	REG_O_ONE(scratch.r1, &ptregs->r1);
+	REG_O_ONE(scratch.r0, &ptregs->r0);
+	REG_O_ONE(scratch.sp, &ptregs->sp);
+
 	REG_O_ZERO(pad2);
-	REG_O_CHUNK(callee, efa, cregs);
-	REG_O_CHUNK(efa, stop_pc, &target->thread.fault_address);
+
+	REG_O_ONE(callee.r25, &cregs->r25);
+	REG_O_ONE(callee.r24, &cregs->r24);
+	REG_O_ONE(callee.r23, &cregs->r23);
+	REG_O_ONE(callee.r22, &cregs->r22);
+	REG_O_ONE(callee.r21, &cregs->r21);
+	REG_O_ONE(callee.r20, &cregs->r20);
+	REG_O_ONE(callee.r19, &cregs->r19);
+	REG_O_ONE(callee.r18, &cregs->r18);
+	REG_O_ONE(callee.r17, &cregs->r17);
+	REG_O_ONE(callee.r16, &cregs->r16);
+	REG_O_ONE(callee.r15, &cregs->r15);
+	REG_O_ONE(callee.r14, &cregs->r14);
+	REG_O_ONE(callee.r13, &cregs->r13);
+
+	REG_O_ONE(efa, &target->thread.fault_address);
 
 	if (!ret) {
 		if (in_brkpt_trap(ptregs)) {
@@ -97,12 +134,51 @@ static int genregs_set(struct task_struct *target,
 			offsetof(struct user_regs_struct, LOC) + 4);
 
 	REG_IGNORE_ONE(pad);
-	/* TBD: disallow updates to STATUS32 etc*/
-	REG_IN_CHUNK(scratch, pad2, ptregs);	/* pt_regs[bta..sp] */
+
+	REG_IN_ONE(scratch.bta, &ptregs->bta);
+	REG_IN_ONE(scratch.lp_start, &ptregs->lp_start);
+	REG_IN_ONE(scratch.lp_end, &ptregs->lp_end);
+	REG_IN_ONE(scratch.lp_count, &ptregs->lp_count);
+
+	REG_IGNORE_ONE(scratch.status32);
+
+	REG_IN_ONE(scratch.ret, &ptregs->ret);
+	REG_IN_ONE(scratch.blink, &ptregs->blink);
+	REG_IN_ONE(scratch.fp, &ptregs->fp);
+	REG_IN_ONE(scratch.gp, &ptregs->r26);
+	REG_IN_ONE(scratch.r12, &ptregs->r12);
+	REG_IN_ONE(scratch.r11, &ptregs->r11);
+	REG_IN_ONE(scratch.r10, &ptregs->r10);
+	REG_IN_ONE(scratch.r9, &ptregs->r9);
+	REG_IN_ONE(scratch.r8, &ptregs->r8);
+	REG_IN_ONE(scratch.r7, &ptregs->r7);
+	REG_IN_ONE(scratch.r6, &ptregs->r6);
+	REG_IN_ONE(scratch.r5, &ptregs->r5);
+	REG_IN_ONE(scratch.r4, &ptregs->r4);
+	REG_IN_ONE(scratch.r3, &ptregs->r3);
+	REG_IN_ONE(scratch.r2, &ptregs->r2);
+	REG_IN_ONE(scratch.r1, &ptregs->r1);
+	REG_IN_ONE(scratch.r0, &ptregs->r0);
+	REG_IN_ONE(scratch.sp, &ptregs->sp);
+
 	REG_IGNORE_ONE(pad2);
-	REG_IN_CHUNK(callee, efa, cregs);	/* callee_regs[r25..r13] */
+
+	REG_IN_ONE(callee.r25, &cregs->r25);
+	REG_IN_ONE(callee.r24, &cregs->r24);
+	REG_IN_ONE(callee.r23, &cregs->r23);
+	REG_IN_ONE(callee.r22, &cregs->r22);
+	REG_IN_ONE(callee.r21, &cregs->r21);
+	REG_IN_ONE(callee.r20, &cregs->r20);
+	REG_IN_ONE(callee.r19, &cregs->r19);
+	REG_IN_ONE(callee.r18, &cregs->r18);
+	REG_IN_ONE(callee.r17, &cregs->r17);
+	REG_IN_ONE(callee.r16, &cregs->r16);
+	REG_IN_ONE(callee.r15, &cregs->r15);
+	REG_IN_ONE(callee.r14, &cregs->r14);
+	REG_IN_ONE(callee.r13, &cregs->r13);
+
 	REG_IGNORE_ONE(efa);			/* efa update invalid */
-	REG_IGNORE_ONE(stop_pc);			/* PC updated via @ret */
+	REG_IGNORE_ONE(stop_pc);		/* PC updated via @ret */
 
 	return ret;
 }