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Diffstat (limited to 'libgo/go/exp/ogle/arch.go')
-rw-r--r-- | libgo/go/exp/ogle/arch.go | 125 |
1 files changed, 0 insertions, 125 deletions
diff --git a/libgo/go/exp/ogle/arch.go b/libgo/go/exp/ogle/arch.go deleted file mode 100644 index 52b1c97572b..00000000000 --- a/libgo/go/exp/ogle/arch.go +++ /dev/null @@ -1,125 +0,0 @@ -// 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 ( - "debug/proc" - "math" -) - -type Arch interface { - // ToWord converts an array of up to 8 bytes in memory order - // to a word. - ToWord(data []byte) proc.Word - // FromWord converts a word to an array of up to 8 bytes in - // memory order. - FromWord(v proc.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 proc.Regs) proc.Word - - // ClosureSize returns the number of bytes expected by - // ParseClosure. - ClosureSize() int - // ParseClosure takes ClosureSize bytes read from a return PC - // in a remote process, determines if the code is a closure, - // and returns the frame size of the closure if it is. - ParseClosure(data []byte) (frame int, ok bool) -} - -type ArchLSB struct{} - -func (ArchLSB) ToWord(data []byte) proc.Word { - var v proc.Word - for i, b := range data { - v |= proc.Word(b) << (uint(i) * 8) - } - return v -} - -func (ArchLSB) FromWord(v proc.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 proc.Regs) proc.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) -} - -func (a *amd64) ClosureSize() int { return 8 } - -func (a *amd64) ParseClosure(data []byte) (int, bool) { - if data[0] == 0x48 && data[1] == 0x81 && data[2] == 0xc4 && data[7] == 0xc3 { - return int(a.ToWord(data[3:7]) + 8), true - } - return 0, false -} - -var Amd64 = &amd64{gReg: -1} |