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Date: Wed, 8 Jul 2009 18:53:12 +0800
From: liqin.chen@...plusct.com
To: Christoph Hellwig <hch@...radead.org>
Cc: Arnd Bergmann <arnd@...db.de>, linux-arch@...r.kernel.org,
linux-kernel@...r.kernel.org,
Linus Torvalds <torvalds@...ux-foundation.org>
Subject: [PATCH] score: add regsets support for score
ptrace.c add register sets support for score architecture.
- genregs_get(struct task_struct *target,
const struct user_regset *regset,
unsigned int pos, unsigned int count,
void *kbuf, void __user *ubuf)
Retrieve the contents of score userspace general registers.
- genregs_set(struct task_struct *target,
const struct user_regset *regset,
unsigned int pos, unsigned int count,
const void *kbuf, const void __user *ubuf)
Update the contents of the score userspace general registers.
Signed-off-by: Chen Liqin <liqin.chen@...plusct.com>
---
arch/score/include/asm/elf.h | 3 +-
arch/score/kernel/ptrace.c | 78
++++++++++++++++++++++++++++++++++++++++++
2 files changed, 80 insertions(+), 1 deletions(-)
diff --git a/arch/score/include/asm/elf.h b/arch/score/include/asm/elf.h
index 8324363..d69668c 100644
--- a/arch/score/include/asm/elf.h
+++ b/arch/score/include/asm/elf.h
@@ -2,7 +2,7 @@
#define _ASM_SCORE_ELF_H
/* ELF register definitions */
-#define ELF_NGREG 45
+#define ELF_NGREG 42
#define ELF_NFPREG 33
#define EM_SCORE7 135
@@ -57,6 +57,7 @@ do { \
struct task_struct;
struct pt_regs;
+#define CORE_DUMP_USE_REGSET
#define USE_ELF_CORE_DUMP
#define ELF_EXEC_PAGESIZE PAGE_SIZE
diff --git a/arch/score/kernel/ptrace.c b/arch/score/kernel/ptrace.c
index 1db876b..9eec6a2 100644
--- a/arch/score/kernel/ptrace.c
+++ b/arch/score/kernel/ptrace.c
@@ -23,11 +23,89 @@
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
+#include <linux/elf.h>
#include <linux/kernel.h>
#include <linux/ptrace.h>
+#include <linux/regset.h>
#include <asm/uaccess.h>
+/*
+ * retrieve the contents of SCORE userspace general registers
+ */
+static int genregs_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ const struct pt_regs *regs = task_pt_regs(target);
+ int end_pos = sizeof(struct pt_regs) - 9 * sizeof(long);
+ int ret;
+
+ ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ regs->regs,
+ offsetof(struct pt_regs, regs),
+ end_pos);
+ if (!ret)
+ ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
+ end_pos, -1);
+
+ return ret;
+}
+
+/*
+ * update the contents of the SCORE userspace general registers
+ */
+static int genregs_set(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ struct pt_regs *regs = task_pt_regs(target);
+ int end_pos = sizeof(struct pt_regs) - 9 * sizeof(long);
+ int ret;
+
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ regs->regs,
+ offsetof(struct pt_regs, regs),
+ end_pos);
+ if (!ret)
+ ret = user_regset_copyin_ignore(&pos, &count, &kbuf,
&ubuf,
+ end_pos, -1);
+
+ return ret;
+}
+
+/*
+ * Define the register sets available on the score7 under Linux
+ */
+enum score7_regset {
+ REGSET_GENERAL,
+};
+
+static const struct user_regset score7_regsets[] = {
+ [REGSET_GENERAL] = {
+ .core_note_type = NT_PRSTATUS,
+ .n = ELF_NGREG,
+ .size = sizeof(long),
+ .align = sizeof(long),
+ .get = genregs_get,
+ .set = genregs_set,
+ },
+};
+
+static const struct user_regset_view user_score_native_view = {
+ .name = "score7",
+ .e_machine = EM_SCORE7,
+ .regsets = score7_regsets,
+ .n = ARRAY_SIZE(score7_regsets),
+};
+
+const struct user_regset_view *task_user_regset_view(struct task_struct
*task)
+{
+ return &user_score_native_view;
+}
+
static int is_16bitinsn(unsigned long insn)
{
if ((insn & INSN32_MASK) == INSN32_MASK)
--
1.6.2
--
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