linux-kernel - [PATCH 1/2] csky: fixup wrong pt

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Date:   Thu, 24 Jan 2019 23:05:27 +0800
From:   guoren@...nel.org
To:     arnd@...db.de
Cc:     linux-kernel@...r.kernel.org, guoren@...nel.org,
        linux-arch@...r.kernel.org, Guo Ren <ren_guo@...ky.com>
Subject: [PATCH 1/2] csky: fixup wrong pt_regs size

From: Guo Ren <ren_guo@...ky.com>

The bug is from commit 2054f4af1957 ("csky: bugfix gdb coredump error.")

We change the ELF_NGREG to ELF_NGREG - 2 to fit gdb define, but forgot
modify ptrace regset. Now coredump use ELF_NRGEG to fit gdb and
gcc-csky.c define and ptrace use pt_regs as regset, there are two
different output regs styles.

Signed-off-by: Guo Ren <ren_guo@...ky.com>
---
 arch/csky/kernel/ptrace.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/csky/kernel/ptrace.c b/arch/csky/kernel/ptrace.c
index 57f1afe..f2f12ff 100644
--- a/arch/csky/kernel/ptrace.c
+++ b/arch/csky/kernel/ptrace.c
@@ -8,6 +8,7 @@
 #include <linux/ptrace.h>
 #include <linux/regset.h>
 #include <linux/sched.h>
+#include <linux/sched/task_stack.h>
 #include <linux/signal.h>
 #include <linux/smp.h>
 #include <linux/uaccess.h>
@@ -159,7 +160,7 @@ static int fpr_set(struct task_struct *target,
 static const struct user_regset csky_regsets[] = {
 	[REGSET_GPR] = {
 		.core_note_type = NT_PRSTATUS,
-		.n = ELF_NGREG,
+		.n = sizeof(struct pt_regs) / sizeof(u32),
 		.size = sizeof(u32),
 		.align = sizeof(u32),
 		.get = &gpr_get,
-- 
2.7.4