arch/um/os-Linux/sys-x86_64/registers.c

   1 /*
   2  * Copyright (C) 2006 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
   3  * Licensed under the GPL
   4  */
   5
   6 #include <errno.h>
   7 #include <sys/ptrace.h>
   8 #define __FRAME_OFFSETS
   9 #include <asm/ptrace.h>
  10 #include "kern_constants.h"
  11 #include "longjmp.h"
  12 #include "user.h"
  13
  14 int save_fp_registers(int pid, unsigned long *fp_regs)
  15 {
  16         if (ptrace(PTRACE_GETFPREGS, pid, 0, fp_regs) < 0)
  17                 return -errno;
  18         return 0;
  19 }
  20
  21 int restore_fp_registers(int pid, unsigned long *fp_regs)
  22 {
  23         if (ptrace(PTRACE_SETFPREGS, pid, 0, fp_regs) < 0)
  24                 return -errno;
  25         return 0;
  26 }
  27
  28 unsigned long get_thread_reg(int reg, jmp_buf *buf)
  29 {
  30         switch (reg) {
  31         case RIP:
  32                 return buf[0]->__rip;
  33         case RSP:
  34                 return buf[0]->__rsp;
  35         case RBP:
  36                 return buf[0]->__rbp;
  37         default:
  38                 printk(UM_KERN_ERR "get_thread_regs - unknown register %d\n",
  39                        reg);
  40                 return 0;
  41         }
  42 }
  43
  44 int get_fp_registers(int pid, unsigned long *regs)
  45 {
  46         return save_fp_registers(pid, regs);
  47 }
  48
  49 int put_fp_registers(int pid, unsigned long *regs)
  50 {
  51         return restore_fp_registers(pid, regs);
  52 }