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 "longjmp.h"
  11 #include "user.h"
  12
  13 int save_fp_registers(int pid, unsigned long *fp_regs)
  14 {
  15         if(ptrace(PTRACE_GETFPREGS, pid, 0, fp_regs) < 0)
  16                 return -errno;
  17         return 0;
  18 }
  19
  20 int restore_fp_registers(int pid, unsigned long *fp_regs)
  21 {
  22         if(ptrace(PTRACE_SETFPREGS, pid, 0, fp_regs) < 0)
  23                 return -errno;
  24         return 0;
  25 }
  26
  27 unsigned long get_thread_reg(int reg, jmp_buf *buf)
  28 {
  29         switch(reg){
  30         case RIP: return buf[0]->__rip;
  31         case RSP: return buf[0]->__rsp;
  32         case RBP: return buf[0]->__rbp;
  33         default:
  34                 printk("get_thread_regs - unknown register %d\n", reg);
  35                 return 0;
  36         }
  37 }