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Message-Id: <20071220120000.8449126F98D@magilla.localdomain>
Date: Thu, 20 Dec 2007 04:00:00 -0800 (PST)
From: Roland McGrath <roland@...hat.com>
To: Andrew Morton <akpm@...ux-foundation.org>,
Linus Torvalds <torvalds@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org
Subject: [PATCH -mm 35/43] x86 user_regset general regs
This adds accessor functions in the user_regset style for
the general registers (struct user_regs_struct).
Signed-off-by: Roland McGrath <roland@...hat.com>
Signed-off-by: Ingo Molnar <mingo@...e.hu>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
---
arch/x86/kernel/ptrace.c | 109 ++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 109 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kernel/ptrace.c b/arch/x86/kernel/ptrace.c
index 18972a3..c520ad7 100644
--- a/arch/x86/kernel/ptrace.c
+++ b/arch/x86/kernel/ptrace.c
@@ -13,6 +13,7 @@
#include <linux/smp.h>
#include <linux/errno.h>
#include <linux/ptrace.h>
+#include <linux/regset.h>
#include <linux/user.h>
#include <linux/security.h>
#include <linux/audit.h>
@@ -368,6 +369,59 @@ static unsigned long getreg(struct task_struct *task, unsigned long offset)
return *pt_regs_access(task_pt_regs(task), offset);
}
+static int genregs_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ if (kbuf) {
+ unsigned long *k = kbuf;
+ while (count > 0) {
+ *k++ = getreg(target, pos);
+ count -= sizeof(*k);
+ pos += sizeof(*k);
+ }
+ } else {
+ unsigned long __user *u = ubuf;
+ while (count > 0) {
+ if (__put_user(getreg(target, pos), u++))
+ return -EFAULT;
+ count -= sizeof(*u);
+ pos += sizeof(*u);
+ }
+ }
+
+ return 0;
+}
+
+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)
+{
+ int ret = 0;
+ if (kbuf) {
+ const unsigned long *k = kbuf;
+ while (count > 0 && !ret) {
+ ret = putreg(target, pos, *k++);
+ count -= sizeof(*k);
+ pos += sizeof(*k);
+ }
+ } else {
+ const unsigned long __user *u = ubuf;
+ while (count > 0 && !ret) {
+ unsigned long word;
+ ret = __get_user(word, u++);
+ if (ret)
+ break;
+ ret = putreg(target, pos, word);
+ count -= sizeof(*u);
+ pos += sizeof(*u);
+ }
+ }
+ return ret;
+}
+
/*
* This function is trivial and will be inlined by the compiler.
* Having it separates the implementation details of debug
@@ -1009,6 +1063,61 @@ static int getreg32(struct task_struct *child, unsigned regno, u32 *val)
#undef R32
#undef SEG32
+static int genregs32_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ if (kbuf) {
+ compat_ulong_t *k = kbuf;
+ while (count > 0) {
+ getreg32(target, pos, k++);
+ count -= sizeof(*k);
+ pos += sizeof(*k);
+ }
+ } else {
+ compat_ulong_t __user *u = ubuf;
+ while (count > 0) {
+ compat_ulong_t word;
+ getreg32(target, pos, &word);
+ if (__put_user(word, u++))
+ return -EFAULT;
+ count -= sizeof(*u);
+ pos += sizeof(*u);
+ }
+ }
+
+ return 0;
+}
+
+static int genregs32_set(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ int ret = 0;
+ if (kbuf) {
+ const compat_ulong_t *k = kbuf;
+ while (count > 0 && !ret) {
+ ret = putreg(target, pos, *k++);
+ count -= sizeof(*k);
+ pos += sizeof(*k);
+ }
+ } else {
+ const compat_ulong_t __user *u = ubuf;
+ while (count > 0 && !ret) {
+ compat_ulong_t word;
+ ret = __get_user(word, u++);
+ if (ret)
+ break;
+ ret = putreg(target, pos, word);
+ count -= sizeof(*u);
+ pos += sizeof(*u);
+ }
+ }
+ return ret;
+}
+
static long ptrace32_siginfo(unsigned request, u32 pid, u32 addr, u32 data)
{
siginfo_t __user *si = compat_alloc_user_space(sizeof(siginfo_t));
--
1.5.3.6
--
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