| // Copyright 2025 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 windows |
| |
| import ( |
| "internal/goarch" |
| "unsafe" |
| ) |
| |
| const CONTEXT_CONTROL = 0x10001 |
| |
| type FloatingSaveArea struct { |
| ControlWord uint32 |
| StatusWord uint32 |
| TagWord uint32 |
| ErrorOffset uint32 |
| ErrorSelector uint32 |
| DataOffset uint32 |
| DataSelector uint32 |
| RegisterArea [80]uint8 |
| Cr0NpxState uint32 |
| } |
| |
| type Context struct { |
| ContextFlags uint32 |
| Dr0 uint32 |
| Dr1 uint32 |
| Dr2 uint32 |
| Dr3 uint32 |
| Dr6 uint32 |
| Dr7 uint32 |
| FloatingSaveArea FloatingSaveArea |
| SegGs uint32 |
| SegFs uint32 |
| SegEs uint32 |
| SegDs uint32 |
| Edi uint32 |
| Esi uint32 |
| Ebx uint32 |
| Edx uint32 |
| Ecx uint32 |
| Eax uint32 |
| Ebp uint32 |
| Eip uint32 |
| SegCs uint32 |
| EFlags uint32 |
| Esp uint32 |
| SegSs uint32 |
| ExtendedRegisters [512]uint8 |
| } |
| |
| func (c *Context) PC() uintptr { return uintptr(c.Eip) } |
| func (c *Context) SP() uintptr { return uintptr(c.Esp) } |
| |
| // 386 does not have link register, so this returns 0. |
| func (c *Context) LR() uintptr { return 0 } |
| func (c *Context) SetLR(x uintptr) {} |
| |
| func (c *Context) SetPC(x uintptr) { c.Eip = uint32(x) } |
| func (c *Context) SetSP(x uintptr) { c.Esp = uint32(x) } |
| |
| // 386 does not have frame pointer register. |
| func (c *Context) SetFP(x uintptr) {} |
| |
| func (c *Context) PushCall(targetPC, resumePC uintptr) { |
| sp := c.SP() - goarch.StackAlign |
| *(*uintptr)(unsafe.Pointer(sp)) = resumePC |
| c.SetSP(sp) |
| c.SetPC(targetPC) |
| } |
| |
| // DISPATCHER_CONTEXT is not defined on 386. |
| type DISPATCHER_CONTEXT struct{} |
| |
| func (c *DISPATCHER_CONTEXT) Ctx() *Context { |
| return nil |
| } |
