libgo/go/syscall/syscall_linux_s390x.go

   1 // syscall_linux_s390x.go -- GNU/Linux s390x specific support
   2
   3 // Copyright 2014 The Go Authors. All rights reserved.
   4 // Use of this source code is governed by a BSD-style
   5 // license that can be found in the LICENSE file.
   6
   7 // The PtraceRegs struct generated for go looks like this:
   8 //
   9 // type PtraceRegs struct
  10 // {
  11 //   Psw _psw_t;
  12 //   Gprs [15+1]uint64;
  13 //   Acrs [15+1]uint32;
  14 //   Orig_gpr2 uint64;
  15 //   Fp_regs _s390_fp_regs;
  16 //   Per_info _per_struct;
  17 //   Ieee_instruction_pointer uint64;
  18 // }
  19 //
  20 // The GETREGSET/SETREGSET ptrace commands on S/390 only read/write
  21 // the content up to Orig_gpr2.  Hence, we use
  22 // PEEKUSR_AREA/POKEUSR_AREA like GDB does.
  23
  24 package syscall
  25
  26 import "unsafe"
  27
  28 func (r *PtraceRegs) PC() uint64 { return r.Psw.addr }
  29
  30 func (r *PtraceRegs) SetPC(pc uint64) { r.Psw.addr = pc }
  31
  32 func PtraceGetRegs(pid int, regs *PtraceRegs) (err error) {
  33         parea := _ptrace_area{
  34                 _sizeof_ptrace_area,
  35                 0,
  36                 uint64(uintptr(unsafe.Pointer(regs))),
  37         }
  38         return ptrace(PTRACE_PEEKUSR_AREA, pid, uintptr(unsafe.Pointer(&parea)), 0)
  39 }
  40
  41 func PtraceSetRegs(pid int, regs *PtraceRegs) (err error) {
  42         parea := _ptrace_area{
  43                 _sizeof_ptrace_area,
  44                 0,
  45                 uint64(uintptr(unsafe.Pointer(regs))),
  46         }
  47         return ptrace(PTRACE_POKEUSR_AREA, pid, uintptr(unsafe.Pointer(&parea)), 0)
  48 }