syscall: Don't use PtraceRegs if it is not defined.

From-SVN: r183758

libgo/go/syscall/libcall_linux.go

@@ -139,14 +139,6 @@ func PtracePokeData(pid int, addr uintptr, data []byte) (count int, err error) {
 	return ptracePoke(PTRACE_POKEDATA, PTRACE_PEEKDATA, pid, addr, data)
 }
 
-func PtraceGetRegs(pid int, regsout *PtraceRegs) (err error) {
-	return ptrace(PTRACE_GETREGS, pid, 0, uintptr(unsafe.Pointer(regsout)))
-}
-
-func PtraceSetRegs(pid int, regs *PtraceRegs) (err error) {
-	return ptrace(PTRACE_SETREGS, pid, 0, uintptr(unsafe.Pointer(regs)))
-}
-
 func PtraceSetOptions(pid int, options int) (err error) {
 	return ptrace(PTRACE_SETOPTIONS, pid, 0, uintptr(options))
 }

libgo/go/syscall/syscall_linux_386.go

@@ -6,10 +6,20 @@
 
 package syscall
 
+import "unsafe"
+
 func (r *PtraceRegs) PC() uint64 {
-	return uint64(uint32(r.Eip));
+	return uint64(uint32(r.Eip))
 }
 
 func (r *PtraceRegs) SetPC(pc uint64) {
-	r.Eip = int32(pc);
+	r.Eip = int32(pc)
+}
+
+func PtraceGetRegs(pid int, regsout *PtraceRegs) (err error) {
+	return ptrace(PTRACE_GETREGS, pid, 0, uintptr(unsafe.Pointer(regsout)))
+}
+
+func PtraceSetRegs(pid int, regs *PtraceRegs) (err error) {
+	return ptrace(PTRACE_SETREGS, pid, 0, uintptr(unsafe.Pointer(regs)))
 }

libgo/go/syscall/syscall_linux_alpha.go

@@ -6,6 +6,8 @@
 
 package syscall
 
+import "unsafe"
+
 type PtraceRegs struct {
 	R0      uint64
 	R1      uint64
@@ -39,9 +41,17 @@ type PtraceRegs struct {
 }
 
 func (r *PtraceRegs) PC() uint64 {
-	return r.Pc;
+	return r.Pc
 }
 
 func (r *PtraceRegs) SetPC(pc uint64) {
-	r.Pc = pc;
+	r.Pc = pc
+}
+
+func PtraceGetRegs(pid int, regsout *PtraceRegs) (err error) {
+	return ptrace(PTRACE_GETREGS, pid, 0, uintptr(unsafe.Pointer(regsout)))
+}
+
+func PtraceSetRegs(pid int, regs *PtraceRegs) (err error) {
+	return ptrace(PTRACE_SETREGS, pid, 0, uintptr(unsafe.Pointer(regs)))
 }

libgo/go/syscall/syscall_linux_amd64.go

@@ -6,10 +6,20 @@
 
 package syscall
 
+import "unsafe"
+
 func (r *PtraceRegs) PC() uint64 {
-	return r.Rip;
+	return r.Rip
 }
 
 func (r *PtraceRegs) SetPC(pc uint64) {
-	r.Rip = pc;
+	r.Rip = pc
+}
+
+func PtraceGetRegs(pid int, regsout *PtraceRegs) (err error) {
+	return ptrace(PTRACE_GETREGS, pid, 0, uintptr(unsafe.Pointer(regsout)))
+}
+
+func PtraceSetRegs(pid int, regs *PtraceRegs) (err error) {
+	return ptrace(PTRACE_SETREGS, pid, 0, uintptr(unsafe.Pointer(regs)))
 }