1// Copyright 2013 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5package runtime
6
7import (
8	"internal/goarch"
9	"unsafe"
10)
11
12type sigctxt struct {
13	info *siginfo
14	ctxt unsafe.Pointer
15}
16
17//go:nosplit
18//go:nowritebarrierrec
19func (c *sigctxt) regs() *sigcontext { return &(*ucontext)(c.ctxt).uc_mcontext }
20
21func (c *sigctxt) eax() uint32 { return c.regs().eax }
22func (c *sigctxt) ebx() uint32 { return c.regs().ebx }
23func (c *sigctxt) ecx() uint32 { return c.regs().ecx }
24func (c *sigctxt) edx() uint32 { return c.regs().edx }
25func (c *sigctxt) edi() uint32 { return c.regs().edi }
26func (c *sigctxt) esi() uint32 { return c.regs().esi }
27func (c *sigctxt) ebp() uint32 { return c.regs().ebp }
28func (c *sigctxt) esp() uint32 { return c.regs().esp }
29
30//go:nosplit
31//go:nowritebarrierrec
32func (c *sigctxt) eip() uint32 { return c.regs().eip }
33
34func (c *sigctxt) eflags() uint32  { return c.regs().eflags }
35func (c *sigctxt) cs() uint32      { return uint32(c.regs().cs) }
36func (c *sigctxt) fs() uint32      { return uint32(c.regs().fs) }
37func (c *sigctxt) gs() uint32      { return uint32(c.regs().gs) }
38func (c *sigctxt) sigcode() uint32 { return uint32(c.info.si_code) }
39func (c *sigctxt) sigaddr() uint32 { return c.info.si_addr }
40
41func (c *sigctxt) set_eip(x uint32)     { c.regs().eip = x }
42func (c *sigctxt) set_esp(x uint32)     { c.regs().esp = x }
43func (c *sigctxt) set_sigcode(x uint32) { c.info.si_code = int32(x) }
44func (c *sigctxt) set_sigaddr(x uint32) {
45	*(*uintptr)(add(unsafe.Pointer(c.info), 2*goarch.PtrSize)) = uintptr(x)
46}
47