libgo/go/syscall/syscall_aix_ppc.go

   1 // syscall_aix_ppc.go -- AIX 32-bit specific support
   2
   3 // Copyright 2017 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 package syscall
   8
   9 import "unsafe"
  10
  11 // AIX does not define a specific structure but instead uses separate
  12 // ptrace calls for the different registers.
  13 type PtraceRegs struct {
  14         Gpr [32]uint32
  15         Iar uint32
  16         Msr uint32
  17         Cr  uint32
  18         Lr  uint32
  19         Ctr uint32
  20         Xer uint32
  21 }
  22
  23 func (r *PtraceRegs) PC() uint64 { return uint64(r.Iar) }
  24
  25 func (r *PtraceRegs) SetPC(pc uint64) { r.Iar = uint32(pc) }
  26
  27 func PtraceGetRegs(pid int, regsout *PtraceRegs) (err error) {
  28         ptrace(_PT_REGSET, pid, uintptr(unsafe.Pointer(&regsout.Gpr[0])), 0, 0)
  29         regsout.Iar = uint32(ptrace(_PT_READ_GPR, pid, 128, 0, 0))
  30         regsout.Msr = uint32(ptrace(_PT_READ_GPR, pid, 129, 0, 0))
  31         regsout.Cr = uint32(ptrace(_PT_READ_GPR, pid, 130, 0, 0))
  32         regsout.Lr = uint32(ptrace(_PT_READ_GPR, pid, 131, 0, 0))
  33         regsout.Ctr = uint32(ptrace(_PT_READ_GPR, pid, 132, 0, 0))
  34         regsout.Xer = uint32(ptrace(_PT_READ_GPR, pid, 133, 0, 0))
  35         return nil
  36 }
  37
  38 func PtraceSetRegs(pid int, regs *PtraceRegs) (err error) {
  39         for i := 0; i < len(regs.Gpr); i++ {
  40                 ptrace(_PT_WRITE_GPR, pid, uintptr(i), int(regs.Gpr[i]), 0)
  41         }
  42         ptrace(_PT_WRITE_GPR, pid, 128, int(regs.Iar), 0)
  43         ptrace(_PT_WRITE_GPR, pid, 129, int(regs.Msr), 0)
  44         ptrace(_PT_WRITE_GPR, pid, 130, int(regs.Cr), 0)
  45         ptrace(_PT_WRITE_GPR, pid, 131, int(regs.Lr), 0)
  46         ptrace(_PT_WRITE_GPR, pid, 132, int(regs.Ctr), 0)
  47         ptrace(_PT_WRITE_GPR, pid, 133, int(regs.Xer), 0)
  48         return nil
  49 }