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authorLennert Buytenhek <buytenh@wantstofly.org>2006-06-27 22:56:19 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2006-06-28 17:55:00 +0100
commit5429b060df6d556f396b78364ad017686015bc34 (patch)
tree48b088aa6eb65e856df91e296447f6a7ea394644
parent3bec6ded282b331552587267d67a06ed7fd95ddd (diff)
downloadblackbird-op-linux-5429b060df6d556f396b78364ad017686015bc34.tar.gz
blackbird-op-linux-5429b060df6d556f396b78364ad017686015bc34.zip
[ARM] 3665/1: crunch: add ptrace support
Patch from Lennert Buytenhek This patch makes it possible to get/set a task's Crunch state via the ptrace(2) system call. Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
-rw-r--r--arch/arm/kernel/ptrace.c36
-rw-r--r--include/asm-arm/ptrace.h5
2 files changed, 41 insertions, 0 deletions
diff --git a/arch/arm/kernel/ptrace.c b/arch/arm/kernel/ptrace.c
index a1d1b2906e8d..c40bdc770054 100644
--- a/arch/arm/kernel/ptrace.c
+++ b/arch/arm/kernel/ptrace.c
@@ -634,6 +634,32 @@ static int ptrace_setwmmxregs(struct task_struct *tsk, void __user *ufp)
#endif
+#ifdef CONFIG_CRUNCH
+/*
+ * Get the child Crunch state.
+ */
+static int ptrace_getcrunchregs(struct task_struct *tsk, void __user *ufp)
+{
+ struct thread_info *thread = task_thread_info(tsk);
+
+ crunch_task_disable(thread); /* force it to ram */
+ return copy_to_user(ufp, &thread->crunchstate, CRUNCH_SIZE)
+ ? -EFAULT : 0;
+}
+
+/*
+ * Set the child Crunch state.
+ */
+static int ptrace_setcrunchregs(struct task_struct *tsk, void __user *ufp)
+{
+ struct thread_info *thread = task_thread_info(tsk);
+
+ crunch_task_release(thread); /* force a reload */
+ return copy_from_user(&thread->crunchstate, ufp, CRUNCH_SIZE)
+ ? -EFAULT : 0;
+}
+#endif
+
long arch_ptrace(struct task_struct *child, long request, long addr, long data)
{
unsigned long tmp;
@@ -765,6 +791,16 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
child->ptrace_message = data;
break;
+#ifdef CONFIG_CRUNCH
+ case PTRACE_GETCRUNCHREGS:
+ ret = ptrace_getcrunchregs(child, (void __user *)data);
+ break;
+
+ case PTRACE_SETCRUNCHREGS:
+ ret = ptrace_setcrunchregs(child, (void __user *)data);
+ break;
+#endif
+
default:
ret = ptrace_request(child, request, addr, data);
break;
diff --git a/include/asm-arm/ptrace.h b/include/asm-arm/ptrace.h
index 2bebe3dc0a30..5a8ef787dbf8 100644
--- a/include/asm-arm/ptrace.h
+++ b/include/asm-arm/ptrace.h
@@ -25,6 +25,11 @@
#define PTRACE_SET_SYSCALL 23
+/* PTRACE_SYSCALL is 24 */
+
+#define PTRACE_GETCRUNCHREGS 25
+#define PTRACE_SETCRUNCHREGS 26
+
/*
* PSR bits
*/
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