code review 135830043: cmd/cc, runtime: convert C compilers to use Go calling ...

src/pkg/runtime/sys_linux_amd64.s

 // Copyright 2009 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.
 
 //
 // System calls and other sys.stuff for AMD64, Linux
 //
 
 #include "zasm_GOOS_GOARCH.h"
 #include "../../cmd/ld/textflag.h"
@@ skipping 260 matching lines @@
         MOVL    op+8(FP), SI
         MOVL    val+12(FP), DX
         MOVQ    ts+16(FP), R10
         MOVQ    addr2+24(FP), R8
         MOVL    val3+32(FP), R9
         MOVL    $202, AX
         SYSCALL
         MOVL    AX, ret+40(FP)
         RET
 
-// int64 clone(int32 flags, void *stack, M *mp, G *gp, void (*fn)(void));
+// int32 clone(int32 flags, void *stack, M *mp, G *gp, void (*fn)(void));
 TEXT runtime·clone(SB),NOSPLIT,$0
         MOVL    flags+8(SP), DI
         MOVQ    stack+16(SP), SI
 
         // Copy mp, gp, fn off parent stack for use by child.
         // Careful: Linux system call clobbers CX and R11.
         MOVQ    mm+24(SP), R8
         MOVQ    gg+32(SP), R9
         MOVQ    fn+40(SP), R12
 
@@ skipping 109 matching lines @@
         RET
 
 // void runtime·closeonexec(int32 fd);
 TEXT runtime·closeonexec(SB),NOSPLIT,$0
         MOVL    fd+0(FP), DI  // fd
         MOVQ    $2, SI  // F_SETFD
         MOVQ    $1, DX  // FD_CLOEXEC
         MOVL    $72, AX  // fcntl
         SYSCALL
         RET