libgo/go/syscall/syscall_aix_ppc64.go

   1 // syscall_aix_ppc64.go -- AIX 64-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]uint64
  15         Iar uint64
  16         Msr uint64
  17         Cr  uint64
  18         Lr  uint64
  19         Ctr uint64
  20         Xer uint64
  21 }
  22
  23 func (r *PtraceRegs) PC() uint64 { return r.Iar }
  24
  25 func (r *PtraceRegs) SetPC(pc uint64) { r.Iar = pc }
  26
  27 func PtraceGetRegs(pid int, regsout *PtraceRegs) (err error) {
  28         ptrace64(_PT_REGSET, int64(pid), int64(uintptr(unsafe.Pointer(&regsout.Gpr[0]))), 0, 0)
  29         ptrace64(_PT_READ_GPR, int64(pid), 128, 0, uintptr(unsafe.Pointer(&regsout.Iar)))
  30         ptrace64(_PT_READ_GPR, int64(pid), 129, 0, uintptr(unsafe.Pointer(&regsout.Msr)))
  31         ptrace64(_PT_READ_GPR, int64(pid), 130, 0, uintptr(unsafe.Pointer(&regsout.Cr)))
  32         ptrace64(_PT_READ_GPR, int64(pid), 131, 0, uintptr(unsafe.Pointer(&regsout.Lr)))
  33         ptrace64(_PT_READ_GPR, int64(pid), 132, 0, uintptr(unsafe.Pointer(&regsout.Ctr)))
  34         ptrace64(_PT_READ_GPR, int64(pid), 133, 0, uintptr(unsafe.Pointer(&regsout.Xer)))
  35         return nil
  36 }
  37
  38 func PtraceSetRegs(pid int, regs *PtraceRegs) (err error) {
  39         for i := 0; i < len(regs.Gpr); i++ {
  40                 ptrace64(_PT_WRITE_GPR, int64(pid), int64(i), 0, uintptr(unsafe.Pointer(&regs.Gpr[i])))
  41         }
  42         ptrace64(_PT_WRITE_GPR, int64(pid), 128, 0, uintptr(unsafe.Pointer(&regs.Iar)))
  43         ptrace64(_PT_WRITE_GPR, int64(pid), 129, 0, uintptr(unsafe.Pointer(&regs.Msr)))
  44         ptrace64(_PT_WRITE_GPR, int64(pid), 130, 0, uintptr(unsafe.Pointer(&regs.Cr)))
  45         ptrace64(_PT_WRITE_GPR, int64(pid), 131, 0, uintptr(unsafe.Pointer(&regs.Lr)))
  46         ptrace64(_PT_WRITE_GPR, int64(pid), 132, 0, uintptr(unsafe.Pointer(&regs.Ctr)))
  47         ptrace64(_PT_WRITE_GPR, int64(pid), 133, 0, uintptr(unsafe.Pointer(&regs.Xer)))
  48         return nil
  49 }