[dev.cc] runtime: convert openbsd/386 port to Go

LGTM=rsc
R=golang-codereviews, bradfitz, rsc
CC=golang-codereviews
https://golang.org/cl/173200044

1 files changed, 41 insertions, 0 deletions

diff --git a/src/runtime/signal_openbsd_386.go b/src/runtime/signal_openbsd_386.go
new file mode 100644
index 0000000000..c582a44935
--- /dev/null
+++ b/src/runtime/signal_openbsd_386.go
@@ -0,0 +1,41 @@
+// Copyright 2013 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 runtime
+
+import "unsafe"
+
+type sigctxt struct {
+	info *siginfo
+	ctxt unsafe.Pointer
+}
+
+func (c *sigctxt) regs() *sigcontext {
+	return (*sigcontext)(c.ctxt)
+}
+
+func (c *sigctxt) eax() uint32     { return c.regs().sc_eax }
+func (c *sigctxt) ebx() uint32     { return c.regs().sc_ebx }
+func (c *sigctxt) ecx() uint32     { return c.regs().sc_ecx }
+func (c *sigctxt) edx() uint32     { return c.regs().sc_edx }
+func (c *sigctxt) edi() uint32     { return c.regs().sc_edi }
+func (c *sigctxt) esi() uint32     { return c.regs().sc_esi }
+func (c *sigctxt) ebp() uint32     { return c.regs().sc_ebp }
+func (c *sigctxt) esp() uint32     { return c.regs().sc_esp }
+func (c *sigctxt) eip() uint32     { return c.regs().sc_eip }
+func (c *sigctxt) eflags() uint32  { return c.regs().sc_eflags }
+func (c *sigctxt) cs() uint32      { return c.regs().sc_cs }
+func (c *sigctxt) fs() uint32      { return c.regs().sc_fs }
+func (c *sigctxt) gs() uint32      { return c.regs().sc_gs }
+func (c *sigctxt) sigcode() uint32 { return uint32(c.info.si_code) }
+func (c *sigctxt) sigaddr() uint32 {
+	return *(*uint32)(add(unsafe.Pointer(c.info), 12))
+}
+
+func (c *sigctxt) set_eip(x uint32)     { c.regs().sc_eip = x }
+func (c *sigctxt) set_esp(x uint32)     { c.regs().sc_esp = x }
+func (c *sigctxt) set_sigcode(x uint32) { c.info.si_code = int32(x) }
+func (c *sigctxt) set_sigaddr(x uint32) {
+	*(*uint32)(add(unsafe.Pointer(c.info), 12)) = x
+}