mirror of
https://github.com/golang/go
synced 2024-10-06 10:11:22 -06:00
119 lines
2.7 KiB
Go
119 lines
2.7 KiB
Go
// Copyright 2009 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package ogle
|
|
|
|
import (
|
|
"math";
|
|
"ptrace";
|
|
)
|
|
|
|
type Arch interface {
|
|
// ToWord converts an array of up to 8 bytes in memory order
|
|
// to a word.
|
|
ToWord(data []byte) ptrace.Word;
|
|
// FromWord converts a word to an array of up to 8 bytes in
|
|
// memory order.
|
|
FromWord(v ptrace.Word, out []byte);
|
|
// ToFloat32 converts a word to a float. The order of this
|
|
// word will be the order returned by ToWord on the memory
|
|
// representation of a float, and thus may require reversing.
|
|
ToFloat32(bits uint32) float32;
|
|
// FromFloat32 converts a float to a word. This should return
|
|
// a word that can be passed to FromWord to get the memory
|
|
// representation of a float on this architecture.
|
|
FromFloat32(f float32) uint32;
|
|
// ToFloat64 is to float64 as ToFloat32 is to float32.
|
|
ToFloat64(bits uint64) float64;
|
|
// FromFloat64 is to float64 as FromFloat32 is to float32.
|
|
FromFloat64(f float64) uint64;
|
|
// IntSize returns the number of bytes in an 'int'.
|
|
IntSize() int;
|
|
// PtrSize returns the number of bytes in a 'uintptr'.
|
|
PtrSize() int;
|
|
// FloatSize returns the number of bytes in a 'float'.
|
|
FloatSize() int;
|
|
// Align rounds offset up to the appropriate offset for a
|
|
// basic type with the given width.
|
|
Align(offset, width int) int;
|
|
// G returns the current G pointer.
|
|
G(regs ptrace.Regs) ptrace.Word;
|
|
}
|
|
|
|
type ArchLSB struct {}
|
|
|
|
func (ArchLSB) ToWord(data []byte) ptrace.Word {
|
|
var v ptrace.Word;
|
|
for i, b := range data {
|
|
v |= ptrace.Word(b) << (uint(i)*8);
|
|
}
|
|
return v;
|
|
}
|
|
|
|
func (ArchLSB) FromWord(v ptrace.Word, out []byte) {
|
|
for i := range out {
|
|
out[i] = byte(v);
|
|
v >>= 8;
|
|
}
|
|
}
|
|
|
|
func (ArchLSB) ToFloat32(bits uint32) float32 {
|
|
// TODO(austin) Do these definitions depend on my current
|
|
// architecture?
|
|
return math.Float32frombits(bits);
|
|
}
|
|
|
|
func (ArchLSB) FromFloat32(f float32) uint32 {
|
|
return math.Float32bits(f);
|
|
}
|
|
|
|
func (ArchLSB) ToFloat64(bits uint64) float64 {
|
|
return math.Float64frombits(bits);
|
|
}
|
|
|
|
func (ArchLSB) FromFloat64(f float64) uint64 {
|
|
return math.Float64bits(f);
|
|
}
|
|
|
|
type ArchAlignedMultiple struct {}
|
|
|
|
func (ArchAlignedMultiple) Align(offset, width int) int {
|
|
return ((offset - 1) | (width - 1)) + 1;
|
|
}
|
|
|
|
type amd64 struct {
|
|
ArchLSB;
|
|
ArchAlignedMultiple;
|
|
gReg int;
|
|
}
|
|
|
|
func (a *amd64) IntSize() int {
|
|
return 4;
|
|
}
|
|
|
|
func (a *amd64) PtrSize() int {
|
|
return 8;
|
|
}
|
|
|
|
func (a *amd64) FloatSize() int {
|
|
return 4;
|
|
}
|
|
|
|
func (a *amd64) G(regs ptrace.Regs) ptrace.Word {
|
|
// See src/pkg/runtime/mkasmh
|
|
if a.gReg == -1 {
|
|
ns := regs.Names();
|
|
for i, n := range ns {
|
|
if n == "r15" {
|
|
a.gReg = i;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
return regs.Get(a.gReg);
|
|
}
|
|
|
|
var Amd64 = &amd64{gReg: -1};
|