uml: fix x86_64 core dump crash

[pandora-kernel.git] / arch / um / os-Linux / sys-x86_64 / registers.c

diff --git a/arch/um/os-Linux/sys-x86_64/registers.c b/arch/um/os-Linux/sys-x86_64/registers.c
index e6fc217..9467315 100644 (file)
--- a/arch/um/os-Linux/sys-x86_64/registers.c
+++ b/arch/um/os-Linux/sys-x86_64/registers.c
@@ -4,6 +4,7 @@
  */
 
 #include <errno.h>
+#include <sys/ptrace.h>
 #include <string.h>
 #include "ptrace_user.h"
 #include "uml-config.h"
@@ -17,6 +18,20 @@
 static unsigned long exec_regs[MAX_REG_NR];
 static unsigned long exec_fp_regs[HOST_FP_SIZE];
 
+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;
+}
+
 void init_thread_registers(union uml_pt_regs *to)
 {
        memcpy(to->skas.regs, exec_regs, sizeof(to->skas.regs));