1 files changed, 52 insertions, 0 deletions

diff --git a/arch/um/os-Linux/sys-x86_64/registers.c b/arch/um/os-Linux/sys-x86_64/registers.c
new file mode 100644
index 00000000000..594d97ad02b
--- /dev/null
+++ b/arch/um/os-Linux/sys-x86_64/registers.c
@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2006 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#include <errno.h>
+#include <sys/ptrace.h>
+#define __FRAME_OFFSETS
+#include <asm/ptrace.h>
+#include "kern_constants.h"
+#include "longjmp.h"
+#include "user.h"
+
+int save_fp_registers(int pid, unsigned long *fp_regs)
+{
+        if (ptrace(PTRACE_GETFPREGS, pid, 0, fp_regs) < 0)
+                return -errno;
+        return 0;
+}
+
+int restore_fp_registers(int pid, unsigned long *fp_regs)
+{
+        if (ptrace(PTRACE_SETFPREGS, pid, 0, fp_regs) < 0)
+                return -errno;
+        return 0;
+}
+
+unsigned long get_thread_reg(int reg, jmp_buf *buf)
+{
+        switch (reg) {
+        case RIP:
+                return buf[0]->__rip;
+        case RSP:
+                return buf[0]->__rsp;
+        case RBP:
+                return buf[0]->__rbp;
+        default:
+                printk(UM_KERN_ERR "get_thread_regs - unknown register %d\n",
+                       reg);
+                return 0;
+        }
+}
+
+int get_fp_registers(int pid, unsigned long *regs)
+{
+        return save_fp_registers(pid, regs);
+}
+
+int put_fp_registers(int pid, unsigned long *regs)
+{
+        return restore_fp_registers(pid, regs);
+}