linux-kernel - [PATCH v2 2/3] arch/tile: implement arch_ptrace using user

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Date:	Mon, 17 Dec 2012 17:35:05 -0500
From:	Simon Marchi <simon.marchi@...ymtl.ca>
To:	cmetcalf@...era.com
Cc:	linux-kernel@...r.kernel.org,
	Simon Marchi <simon.marchi@...ymtl.ca>
Subject: [PATCH v2 2/3] arch/tile: implement arch_ptrace using user_regset on tile

This patch changes arch_ptrace on tile so that it uses user_regset
to implement the PTRACE_GETREGS and PTRACE_SETREGS operations.

Signed-off-by: Simon Marchi <simon.marchi@...ymtl.ca>
---
 arch/tile/kernel/ptrace.c |   15 ++++++---------
 1 files changed, 6 insertions(+), 9 deletions(-)

diff --git a/arch/tile/kernel/ptrace.c b/arch/tile/kernel/ptrace.c
index 222d9fc..d11661f 100644
--- a/arch/tile/kernel/ptrace.c
+++ b/arch/tile/kernel/ptrace.c
@@ -193,18 +193,15 @@ long arch_ptrace(struct task_struct *child, long request,
 		break;
 
 	case PTRACE_GETREGS:  /* Get all registers from the child. */
-		if (copy_to_user(datap, getregs(child, &copyregs),
-				 sizeof(struct pt_regs)) == 0) {
-			ret = 0;
-		}
+		ret = copy_regset_to_user(child, &tile_user_regset_view,
+					  REGSET_GPR, 0,
+					  sizeof(struct pt_regs), datap);
 		break;
 
 	case PTRACE_SETREGS:  /* Set all registers in the child. */
-		if (copy_from_user(&copyregs, datap,
-				   sizeof(struct pt_regs)) == 0) {
-			putregs(child, &copyregs);
-			ret = 0;
-		}
+		ret = copy_regset_from_user(child, &tile_user_regset_view,
+					    REGSET_GPR, 0,
+					    sizeof(struct pt_regs), datap);
 		break;
 
 	case PTRACE_GETFPREGS:  /* Get the child FPU state. */
-- 
1.7.1

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