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

LGTM=rsc
R=rsc, bradfitz
CC=golang-codereviews
https://golang.org/cl/178210043

src/runtime/defs_dragonfly_386.go

@@ -92,16 +92,16 @@ type rtprio struct {
 }
 
 type lwpparams struct {
-	_type unsafe.Pointer
-	arg   *byte
-	stack *byte
-	tid1  *int32
-	tid2  *int32
+	start_func uintptr
+	arg        unsafe.Pointer
+	stack      uintptr
+	tid1       unsafe.Pointer // *int32
+	tid2       unsafe.Pointer // *int32
 }
 
 type sigaltstackt struct {
-	ss_sp    *int8
-	ss_size  uint32
+	ss_sp    uintptr
+	ss_size  uintptr
 	ss_flags int32
 }
 
@@ -110,8 +110,8 @@ type sigset struct {
 }
 
 type stackt struct {
-	ss_sp    *int8
-	ss_size  uint32
+	ss_sp    uintptr
+	ss_size  uintptr
 	ss_flags int32
 }
 
@@ -122,39 +122,39 @@ type siginfo struct {
 	si_pid    int32
 	si_uid    uint32
 	si_status int32
-	si_addr   *byte
+	si_addr   uintptr
 	si_value  [4]byte
 	si_band   int32
 	__spare__ [7]int32
 }
 
 type mcontext struct {
-	mc_onstack  int32
-	mc_gs       int32
-	mc_fs       int32
-	mc_es       int32
-	mc_ds       int32
-	mc_edi      int32
-	mc_esi      int32
-	mc_ebp      int32
-	mc_isp      int32
-	mc_ebx      int32
-	mc_edx      int32
-	mc_ecx      int32
-	mc_eax      int32
-	mc_xflags   int32
-	mc_trapno   int32
-	mc_err      int32
-	mc_eip      int32
-	mc_cs       int32
-	mc_eflags   int32
-	mc_esp      int32
-	mc_ss       int32
-	mc_len      int32
-	mc_fpformat int32
-	mc_ownedfp  int32
-	mc_fpregs   [128]int32
-	__spare__   [16]int32
+	mc_onstack  uint32
+	mc_gs       uint32
+	mc_fs       uint32
+	mc_es       uint32
+	mc_ds       uint32
+	mc_edi      uint32
+	mc_esi      uint32
+	mc_ebp      uint32
+	mc_isp      uint32
+	mc_ebx      uint32
+	mc_edx      uint32
+	mc_ecx      uint32
+	mc_eax      uint32
+	mc_xflags   uint32
+	mc_trapno   uint32
+	mc_err      uint32
+	mc_eip      uint32
+	mc_cs       uint32
+	mc_eflags   uint32
+	mc_esp      uint32
+	mc_ss       uint32
+	mc_len      uint32
+	mc_fpformat uint32
+	mc_ownedfp  uint32
+	mc_fpregs   [128]uint32
+	__spare__   [16]uint32
 }
 
 type ucontext struct {
@@ -170,11 +170,19 @@ type timespec struct {
 	tv_nsec int32
 }
 
+func (ts *timespec) set_sec(x int64) {
+	ts.tv_sec = int32(x)
+}
+
 type timeval struct {
 	tv_sec  int32
 	tv_usec int32
 }
 
+func (tv *timeval) set_usec(x int32) {
+	tv.tv_usec = x
+}
+
 type itimerval struct {
 	it_interval timeval
 	it_value    timeval

src/runtime/signal_dragonfly_386.go

+// 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() *mcontext { return &(*ucontext)(c.ctxt).uc_mcontext }
+func (c *sigctxt) eax() uint32     { return c.regs().mc_eax }
+func (c *sigctxt) ebx() uint32     { return c.regs().mc_ebx }
+func (c *sigctxt) ecx() uint32     { return c.regs().mc_ecx }
+func (c *sigctxt) edx() uint32     { return c.regs().mc_edx }
+func (c *sigctxt) edi() uint32     { return c.regs().mc_edi }
+func (c *sigctxt) esi() uint32     { return c.regs().mc_esi }
+func (c *sigctxt) ebp() uint32     { return c.regs().mc_ebp }
+func (c *sigctxt) esp() uint32     { return c.regs().mc_esp }
+func (c *sigctxt) eip() uint32     { return c.regs().mc_eip }
+func (c *sigctxt) eflags() uint32  { return c.regs().mc_eflags }
+func (c *sigctxt) cs() uint32      { return uint32(c.regs().mc_cs) }
+func (c *sigctxt) fs() uint32      { return uint32(c.regs().mc_fs) }
+func (c *sigctxt) gs() uint32      { return uint32(c.regs().mc_gs) }
+func (c *sigctxt) sigcode() uint32 { return uint32(c.info.si_code) }
+func (c *sigctxt) sigaddr() uint32 { return uint32(c.info.si_addr) }
+
+func (c *sigctxt) set_eip(x uint32)     { c.regs().mc_eip = x }
+func (c *sigctxt) set_esp(x uint32)     { c.regs().mc_esp = x }
+func (c *sigctxt) set_sigcode(x uint32) { c.info.si_code = int32(x) }
+func (c *sigctxt) set_sigaddr(x uint32) { c.info.si_addr = uintptr(x) }

src/runtime/signal_dragonfly_386.h

-// 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.
-
-#define SIG_REGS(ctxt) (((Ucontext*)(ctxt))->uc_mcontext)
-
-#define SIG_EAX(info, ctxt) (SIG_REGS(ctxt).mc_eax)
-#define SIG_EBX(info, ctxt) (SIG_REGS(ctxt).mc_ebx)
-#define SIG_ECX(info, ctxt) (SIG_REGS(ctxt).mc_ecx)
-#define SIG_EDX(info, ctxt) (SIG_REGS(ctxt).mc_edx)
-#define SIG_EDI(info, ctxt) (SIG_REGS(ctxt).mc_edi)
-#define SIG_ESI(info, ctxt) (SIG_REGS(ctxt).mc_esi)
-#define SIG_EBP(info, ctxt) (SIG_REGS(ctxt).mc_ebp)
-#define SIG_ESP(info, ctxt) (SIG_REGS(ctxt).mc_esp)
-#define SIG_EIP(info, ctxt) (SIG_REGS(ctxt).mc_eip)
-#define SIG_EFLAGS(info, ctxt) (SIG_REGS(ctxt).mc_eflags)
-
-#define SIG_CS(info, ctxt) (SIG_REGS(ctxt).mc_cs)
-#define SIG_FS(info, ctxt) (SIG_REGS(ctxt).mc_fs)
-#define SIG_GS(info, ctxt) (SIG_REGS(ctxt).mc_gs)
-
-#define SIG_CODE0(info, ctxt) ((info)->si_code)
-#define SIG_CODE1(info, ctxt) ((uintptr)(info)->si_addr)