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 "unsafe"
8
9type sigctxt struct {
10	info *siginfo
11	ctxt unsafe.Pointer
12}
13
14//go:nosplit
15//go:nowritebarrierrec
16func (c *sigctxt) regs() *mcontextt { return &(*ucontextt)(c.ctxt).uc_mcontext }
17
18func (c *sigctxt) eax() uint32 { return c.regs().__gregs[_REG_EAX] }
19func (c *sigctxt) ebx() uint32 { return c.regs().__gregs[_REG_EBX] }
20func (c *sigctxt) ecx() uint32 { return c.regs().__gregs[_REG_ECX] }
21func (c *sigctxt) edx() uint32 { return c.regs().__gregs[_REG_EDX] }
22func (c *sigctxt) edi() uint32 { return c.regs().__gregs[_REG_EDI] }
23func (c *sigctxt) esi() uint32 { return c.regs().__gregs[_REG_ESI] }
24func (c *sigctxt) ebp() uint32 { return c.regs().__gregs[_REG_EBP] }
25func (c *sigctxt) esp() uint32 { return c.regs().__gregs[_REG_UESP] }
26
27//go:nosplit
28//go:nowritebarrierrec
29func (c *sigctxt) eip() uint32 { return c.regs().__gregs[_REG_EIP] }
30
31func (c *sigctxt) eflags() uint32  { return c.regs().__gregs[_REG_EFL] }
32func (c *sigctxt) cs() uint32      { return c.regs().__gregs[_REG_CS] }
33func (c *sigctxt) fs() uint32      { return c.regs().__gregs[_REG_FS] }
34func (c *sigctxt) gs() uint32      { return c.regs().__gregs[_REG_GS] }
35func (c *sigctxt) sigcode() uint32 { return uint32(c.info._code) }
36func (c *sigctxt) sigaddr() uint32 {
37	return *(*uint32)(unsafe.Pointer(&c.info._reason[0]))
38}
39
40func (c *sigctxt) set_eip(x uint32)     { c.regs().__gregs[_REG_EIP] = x }
41func (c *sigctxt) set_esp(x uint32)     { c.regs().__gregs[_REG_UESP] = x }
42func (c *sigctxt) set_sigcode(x uint32) { c.info._code = int32(x) }
43func (c *sigctxt) set_sigaddr(x uint32) {
44	*(*uint32)(unsafe.Pointer(&c.info._reason[0])) = x
45}
46