Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 84 insertions, 0 deletions

diff --git a/arch/h8300/platform/h8s/ptrace_h8s.c b/arch/h8300/platform/h8s/ptrace_h8s.c
new file mode 100644
index 00000000000..e8cd46f9255
--- /dev/null
+++ b/arch/h8300/platform/h8s/ptrace_h8s.c
@@ -0,0 +1,84 @@
+/*
+ *  linux/arch/h8300/platform/h8s/ptrace_h8s.c
+ *    ptrace cpu depend helper functions
+ *
+ *  Yoshinori Sato <ysato@users.sourceforge.jp>
+ *
+ * This file is subject to the terms and conditions of the GNU General
+ * Public License.  See the file COPYING in the main directory of
+ * this archive for more details.
+ */
+
+#include <linux/linkage.h>
+#include <linux/sched.h>
+#include <linux/errno.h>
+#include <asm/ptrace.h>
+
+#define CCR_MASK  0x6f
+#define EXR_TRACE 0x80
+
+/* Mapping from PT_xxx to the stack offset at which the register is
+   saved.  Notice that usp has no stack-slot and needs to be treated
+   specially (see get_reg/put_reg below). */
+static const int h8300_register_offset[] = {
+	PT_REG(er1), PT_REG(er2), PT_REG(er3), PT_REG(er4),
+	PT_REG(er5), PT_REG(er6), PT_REG(er0), PT_REG(orig_er0),
+	PT_REG(ccr), PT_REG(pc),  0,           PT_REG(exr)
+};
+
+/* read register */
+long h8300_get_reg(struct task_struct *task, int regno)
+{
+	switch (regno) {
+	case PT_USP:
+		return task->thread.usp + sizeof(long)*2 + 2;
+	case PT_CCR:
+	case PT_EXR:
+	    return *(unsigned short *)(task->thread.esp0 + h8300_register_offset[regno]);
+	default:
+	    return *(unsigned long *)(task->thread.esp0 + h8300_register_offset[regno]);
+	}
+}
+
+/* write register */
+int h8300_put_reg(struct task_struct *task, int regno, unsigned long data)
+{
+	unsigned short oldccr;
+	switch (regno) {
+	case PT_USP:
+		task->thread.usp = data - sizeof(long)*2 - 2;
+	case PT_CCR:
+		oldccr = *(unsigned short *)(task->thread.esp0 + h8300_register_offset[regno]);
+		oldccr &= ~CCR_MASK;
+		data &= CCR_MASK;
+		data |= oldccr;
+		*(unsigned short *)(task->thread.esp0 + h8300_register_offset[regno]) = data;
+		break;
+	case PT_EXR:
+		/* exr modify not support */
+		return -EIO;
+	default:
+		*(unsigned long *)(task->thread.esp0 + h8300_register_offset[regno]) = data;
+		break;
+	}
+	return 0;
+}
+
+/* disable singlestep */
+void h8300_disable_trace(struct task_struct *child)
+{
+	*(unsigned short *)(child->thread.esp0 + h8300_register_offset[PT_EXR]) &= ~EXR_TRACE;
+}
+
+/* enable singlestep */
+void h8300_enable_trace(struct task_struct *child)
+{
+	*(unsigned short *)(child->thread.esp0 + h8300_register_offset[PT_EXR]) |= EXR_TRACE;
+}
+
+asmlinkage void trace_trap(unsigned long bp)
+{
+	(void)bp;
+	force_sig(SIGTRAP,current);
+}
+