internal/syscall/unix: use libc calls on Darwin

Add unexported unlinkat, openat, and fstatat calls, so that
the internal/syscall/unix package can use them.

Change-Id: I1df81ecae6427211dd392ec68c9f020fe131a526
Reviewed-on: https://go-review.googlesource.com/c/148457
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

diff --git a/src/internal/syscall/unix/at.go b/src/internal/syscall/unix/at.go
index c007c87b20c2303c58b0f733e11cb87fc49439da..f857d6828004e8d8b6a1e4d0504ec5a760b9e8d1 100644 (file)
--- a/src/internal/syscall/unix/at.go
+++ b/src/internal/syscall/unix/at.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build linux darwin openbsd netbsd dragonfly
+// +build linux openbsd netbsd dragonfly
 
 package unix
 

diff --git a/src/internal/syscall/unix/at_darwin.go b/src/internal/syscall/unix/at_darwin.go
new file mode 100644 (file)
index 0000000..a88a27e
--- /dev/null
+++ b/src/internal/syscall/unix/at_darwin.go
@@ -0,0 +1,31 @@
+// Copyright 2018 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 unix
+
+import (
+       "syscall"
+       _ "unsafe" // for linkname
+)
+
+func Unlinkat(dirfd int, path string, flags int) error {
+       return unlinkat(dirfd, path, flags)
+}
+
+func Openat(dirfd int, path string, flags int, perm uint32) (int, error) {
+       return openat(dirfd, path, flags, perm)
+}
+
+func Fstatat(dirfd int, path string, stat *syscall.Stat_t, flags int) error {
+       return fstatat(dirfd, path, stat, flags)
+}
+
+//go:linkname unlinkat syscall.unlinkat
+func unlinkat(dirfd int, path string, flags int) error
+
+//go:linkname openat syscall.openat
+func openat(dirfd int, path string, flags int, perm uint32) (int, error)
+
+//go:linkname fstatat syscall.fstatat
+func fstatat(dirfd int, path string, stat *syscall.Stat_t, flags int) error

diff --git a/src/runtime/sys_darwin_arm64.s b/src/runtime/sys_darwin_arm64.s
index 3aac2d9215d91808c604c30bfa33c42cc1a4a4c2..10d853435901548c0c7e1fa57c48faebc9ad01f5 100644 (file)
--- a/src/runtime/sys_darwin_arm64.s
+++ b/src/runtime/sys_darwin_arm64.s
@@ -483,7 +483,7 @@ ok:
 // C calling convention (use libcCall).
 TEXT runtime·syscall6(SB),NOSPLIT,$0
        SUB     $16, RSP        // push structure pointer
-       MOVD    R0, (RSP)
+       MOVD    R0, 8(RSP)
 
        MOVD    0(R0), R12      // fn
        MOVD    16(R0), R1      // a2
@@ -492,19 +492,25 @@ TEXT runtime·syscall6(SB),NOSPLIT,$0
        MOVD    40(R0), R4      // a5
        MOVD    48(R0), R5      // a6
        MOVD    8(R0), R0       // a1
+
+       // If fn is declared as vararg, we have to pass the vararg arguments on the stack.
+       // See syscall above. The only function this applies to is openat, for which the 4th
+       // arg must be on the stack.
+       MOVD    R3, (RSP)
+
        BL      (R12)
 
-       MOVD    (RSP), R2       // pop structure pointer
+       MOVD    8(RSP), R2      // pop structure pointer
        ADD     $16, RSP
        MOVD    R0, 56(R2)      // save r1
        MOVD    R1, 64(R2)      // save r2
        CMPW    $-1, R0
        BNE     ok
        SUB     $16, RSP        // push structure pointer
-       MOVD    R2, (RSP)
+       MOVD    R2, 8(RSP)
        BL      libc_error(SB)
        MOVW    (R0), R0
-       MOVD    (RSP), R2       // pop structure pointer
+       MOVD    8(RSP), R2      // pop structure pointer
        ADD     $16, RSP
        MOVD    R0, 72(R2)      // save err
 ok:

diff --git a/src/syscall/syscall_darwin.go b/src/syscall/syscall_darwin.go
index 9763856ef52bc03319c898d76f31d5b6519e37cb..28cf05e0f778bab10db72abd65ff349271cc94be 100644 (file)
--- a/src/syscall/syscall_darwin.go
+++ b/src/syscall/syscall_darwin.go
@@ -344,6 +344,9 @@ func Kill(pid int, signum Signal) (err error) { return kill(pid, int(signum), 1)
 //sysnb exit(res int) (err error)
 //sys  sysctl(mib []_C_int, old *byte, oldlen *uintptr, new *byte, newlen uintptr) (err error)
 //sys  fcntlPtr(fd int, cmd int, arg unsafe.Pointer) (val int, err error) = SYS_fcntl
+//sys   unlinkat(fd int, path string, flags int) (err error)
+//sys   openat(fd int, path string, flags int, perm uint32) (fdret int, err error)
+//sys   fstatat(fd int, path string, stat *Stat_t, flags int) (err error) = SYS_fstatat64
 
 func init() {
        execveDarwin = execve

diff --git a/src/syscall/zsyscall_darwin_386.go b/src/syscall/zsyscall_darwin_386.go
index bcc42440d4cc0a041c2f14fdac06e228add2fbe0..6ae6e86a50a01c731f0c83575a28d866b57a894f 100644 (file)
--- a/src/syscall/zsyscall_darwin_386.go
+++ b/src/syscall/zsyscall_darwin_386.go
@@ -1886,6 +1886,64 @@ func fcntlPtr(fd int, cmd int, arg unsafe.Pointer) (val int, err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func unlinkat(fd int, path string, flags int) (err error) {
+       var _p0 *byte
+       _p0, err = BytePtrFromString(path)
+       if err != nil {
+               return
+       }
+       _, _, e1 := syscall(funcPC(libc_unlinkat_trampoline), uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(flags))
+       if e1 != 0 {
+               err = errnoErr(e1)
+       }
+       return
+}
+
+func libc_unlinkat_trampoline()
+
+//go:linkname libc_unlinkat libc_unlinkat
+//go:cgo_import_dynamic libc_unlinkat unlinkat "/usr/lib/libSystem.B.dylib"
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func openat(fd int, path string, flags int, perm uint32) (fdret int, err error) {
+       var _p0 *byte
+       _p0, err = BytePtrFromString(path)
+       if err != nil {
+               return
+       }
+       r0, _, e1 := syscall6(funcPC(libc_openat_trampoline), uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(flags), uintptr(perm), 0, 0)
+       fdret = int(r0)
+       if e1 != 0 {
+               err = errnoErr(e1)
+       }
+       return
+}
+
+func libc_openat_trampoline()
+
+//go:linkname libc_openat libc_openat
+//go:cgo_import_dynamic libc_openat openat "/usr/lib/libSystem.B.dylib"
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func fstatat(fd int, path string, stat *Stat_t, flags int) (err error) {
+       var _p0 *byte
+       _p0, err = BytePtrFromString(path)
+       if err != nil {
+               return
+       }
+       _, _, e1 := syscall6(funcPC(libc_fstatat64_trampoline), uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(stat)), uintptr(flags), 0, 0)
+       if e1 != 0 {
+               err = errnoErr(e1)
+       }
+       return
+}
+
+func libc_fstatat64_trampoline()
+
+//go:linkname libc_fstatat64 libc_fstatat64
+//go:cgo_import_dynamic libc_fstatat64 fstatat64 "/usr/lib/libSystem.B.dylib"
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func Gettimeofday(tp *Timeval) (err error) {
        _, _, e1 := rawSyscall(funcPC(libc_gettimeofday_trampoline), uintptr(unsafe.Pointer(tp)), 0, 0)
        if e1 != 0 {

diff --git a/src/syscall/zsyscall_darwin_386.s b/src/syscall/zsyscall_darwin_386.s
index 481caa982ed89f7841f87ba584620f8972441bf8..bfb3037a6a14da18e6a5046cb9d3b61c8813e649 100644 (file)
--- a/src/syscall/zsyscall_darwin_386.s
+++ b/src/syscall/zsyscall_darwin_386.s
@@ -239,5 +239,11 @@ TEXT ·libc_exit_trampoline(SB),NOSPLIT,$0-0
        JMP     libc_exit(SB)
 TEXT ·libc_sysctl_trampoline(SB),NOSPLIT,$0-0
        JMP     libc_sysctl(SB)
+TEXT ·libc_unlinkat_trampoline(SB),NOSPLIT,$0-0
+       JMP     libc_unlinkat(SB)
+TEXT ·libc_openat_trampoline(SB),NOSPLIT,$0-0
+       JMP     libc_openat(SB)
+TEXT ·libc_fstatat64_trampoline(SB),NOSPLIT,$0-0
+       JMP     libc_fstatat64(SB)
 TEXT ·libc_gettimeofday_trampoline(SB),NOSPLIT,$0-0
        JMP     libc_gettimeofday(SB)

diff --git a/src/syscall/zsyscall_darwin_amd64.go b/src/syscall/zsyscall_darwin_amd64.go
index 6a077a31fd174cbd329e92e30aaed989cc7485e1..6d8442dc836ba2618f6e5c2926f5fc6893afdf62 100644 (file)
--- a/src/syscall/zsyscall_darwin_amd64.go
+++ b/src/syscall/zsyscall_darwin_amd64.go
@@ -1886,6 +1886,64 @@ func fcntlPtr(fd int, cmd int, arg unsafe.Pointer) (val int, err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func unlinkat(fd int, path string, flags int) (err error) {
+       var _p0 *byte
+       _p0, err = BytePtrFromString(path)
+       if err != nil {
+               return
+       }
+       _, _, e1 := syscall(funcPC(libc_unlinkat_trampoline), uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(flags))
+       if e1 != 0 {
+               err = errnoErr(e1)
+       }
+       return
+}
+
+func libc_unlinkat_trampoline()
+
+//go:linkname libc_unlinkat libc_unlinkat
+//go:cgo_import_dynamic libc_unlinkat unlinkat "/usr/lib/libSystem.B.dylib"
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func openat(fd int, path string, flags int, perm uint32) (fdret int, err error) {
+       var _p0 *byte
+       _p0, err = BytePtrFromString(path)
+       if err != nil {
+               return
+       }
+       r0, _, e1 := syscall6(funcPC(libc_openat_trampoline), uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(flags), uintptr(perm), 0, 0)
+       fdret = int(r0)
+       if e1 != 0 {
+               err = errnoErr(e1)
+       }
+       return
+}
+
+func libc_openat_trampoline()
+
+//go:linkname libc_openat libc_openat
+//go:cgo_import_dynamic libc_openat openat "/usr/lib/libSystem.B.dylib"
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func fstatat(fd int, path string, stat *Stat_t, flags int) (err error) {
+       var _p0 *byte
+       _p0, err = BytePtrFromString(path)
+       if err != nil {
+               return
+       }
+       _, _, e1 := syscall6(funcPC(libc_fstatat64_trampoline), uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(stat)), uintptr(flags), 0, 0)
+       if e1 != 0 {
+               err = errnoErr(e1)
+       }
+       return
+}
+
+func libc_fstatat64_trampoline()
+
+//go:linkname libc_fstatat64 libc_fstatat64
+//go:cgo_import_dynamic libc_fstatat64 fstatat64 "/usr/lib/libSystem.B.dylib"
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func Gettimeofday(tp *Timeval) (err error) {
        _, _, e1 := rawSyscall(funcPC(libc_gettimeofday_trampoline), uintptr(unsafe.Pointer(tp)), 0, 0)
        if e1 != 0 {

diff --git a/src/syscall/zsyscall_darwin_amd64.s b/src/syscall/zsyscall_darwin_amd64.s
index 54a8720513da454005b104dc35a14e85ae4608c1..6253d2801bc4c389d57f6beb4f6f6584e0c95d09 100644 (file)
--- a/src/syscall/zsyscall_darwin_amd64.s
+++ b/src/syscall/zsyscall_darwin_amd64.s
@@ -239,5 +239,11 @@ TEXT ·libc_exit_trampoline(SB),NOSPLIT,$0-0
        JMP     libc_exit(SB)
 TEXT ·libc_sysctl_trampoline(SB),NOSPLIT,$0-0
        JMP     libc_sysctl(SB)
+TEXT ·libc_unlinkat_trampoline(SB),NOSPLIT,$0-0
+       JMP     libc_unlinkat(SB)
+TEXT ·libc_openat_trampoline(SB),NOSPLIT,$0-0
+       JMP     libc_openat(SB)
+TEXT ·libc_fstatat64_trampoline(SB),NOSPLIT,$0-0
+       JMP     libc_fstatat64(SB)
 TEXT ·libc_gettimeofday_trampoline(SB),NOSPLIT,$0-0
        JMP     libc_gettimeofday(SB)

diff --git a/src/syscall/zsyscall_darwin_arm.go b/src/syscall/zsyscall_darwin_arm.go
index f1af2f6f38fc9cb8f8a51727c76a847270c10f65..be695abff39f41d496e8387d214e3632a1e57546 100644 (file)
--- a/src/syscall/zsyscall_darwin_arm.go
+++ b/src/syscall/zsyscall_darwin_arm.go
@@ -1886,6 +1886,64 @@ func fcntlPtr(fd int, cmd int, arg unsafe.Pointer) (val int, err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func unlinkat(fd int, path string, flags int) (err error) {
+       var _p0 *byte
+       _p0, err = BytePtrFromString(path)
+       if err != nil {
+               return
+       }
+       _, _, e1 := syscall(funcPC(libc_unlinkat_trampoline), uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(flags))
+       if e1 != 0 {
+               err = errnoErr(e1)
+       }
+       return
+}
+
+func libc_unlinkat_trampoline()
+
+//go:linkname libc_unlinkat libc_unlinkat
+//go:cgo_import_dynamic libc_unlinkat unlinkat "/usr/lib/libSystem.B.dylib"
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func openat(fd int, path string, flags int, perm uint32) (fdret int, err error) {
+       var _p0 *byte
+       _p0, err = BytePtrFromString(path)
+       if err != nil {
+               return
+       }
+       r0, _, e1 := syscall6(funcPC(libc_openat_trampoline), uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(flags), uintptr(perm), 0, 0)
+       fdret = int(r0)
+       if e1 != 0 {
+               err = errnoErr(e1)
+       }
+       return
+}
+
+func libc_openat_trampoline()
+
+//go:linkname libc_openat libc_openat
+//go:cgo_import_dynamic libc_openat openat "/usr/lib/libSystem.B.dylib"
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func fstatat(fd int, path string, stat *Stat_t, flags int) (err error) {
+       var _p0 *byte
+       _p0, err = BytePtrFromString(path)
+       if err != nil {
+               return
+       }
+       _, _, e1 := syscall6(funcPC(libc_fstatat64_trampoline), uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(stat)), uintptr(flags), 0, 0)
+       if e1 != 0 {
+               err = errnoErr(e1)
+       }
+       return
+}
+
+func libc_fstatat64_trampoline()
+
+//go:linkname libc_fstatat64 libc_fstatat64
+//go:cgo_import_dynamic libc_fstatat64 fstatat64 "/usr/lib/libSystem.B.dylib"
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func Gettimeofday(tp *Timeval) (err error) {
        _, _, e1 := rawSyscall(funcPC(libc_gettimeofday_trampoline), uintptr(unsafe.Pointer(tp)), 0, 0)
        if e1 != 0 {

diff --git a/src/syscall/zsyscall_darwin_arm.s b/src/syscall/zsyscall_darwin_arm.s
index 409b964d3db88a07ecc36fb019094a93b2f2ca6d..8fe7d12e561c75800db30883da3c53f4f692e408 100644 (file)
--- a/src/syscall/zsyscall_darwin_arm.s
+++ b/src/syscall/zsyscall_darwin_arm.s
@@ -223,6 +223,8 @@ TEXT ·libc_unmount_trampoline(SB),NOSPLIT,$0-0
        JMP     libc_unmount(SB)
 TEXT ·libc_write_trampoline(SB),NOSPLIT,$0-0
        JMP     libc_write(SB)
+TEXT ·libc_writev_trampoline(SB),NOSPLIT,$0-0
+       JMP     libc_writev(SB)
 TEXT ·libc_mmap_trampoline(SB),NOSPLIT,$0-0
        JMP     libc_mmap(SB)
 TEXT ·libc_munmap_trampoline(SB),NOSPLIT,$0-0
@@ -237,7 +239,11 @@ TEXT ·libc_exit_trampoline(SB),NOSPLIT,$0-0
        JMP     libc_exit(SB)
 TEXT ·libc_sysctl_trampoline(SB),NOSPLIT,$0-0
        JMP     libc_sysctl(SB)
-TEXT ·libc_writev_trampoline(SB),NOSPLIT,$0-0
-       JMP     libc_writev(SB)
+TEXT ·libc_unlinkat_trampoline(SB),NOSPLIT,$0-0
+       JMP     libc_unlinkat(SB)
+TEXT ·libc_openat_trampoline(SB),NOSPLIT,$0-0
+       JMP     libc_openat(SB)
+TEXT ·libc_fstatat64_trampoline(SB),NOSPLIT,$0-0
+       JMP     libc_fstatat64(SB)
 TEXT ·libc_gettimeofday_trampoline(SB),NOSPLIT,$0-0
        JMP     libc_gettimeofday(SB)

diff --git a/src/syscall/zsyscall_darwin_arm64.go b/src/syscall/zsyscall_darwin_arm64.go
index e4d855528441c777e568f175b93e5481f999ad49..726f63d17050cb13b84f5889ab2f46c7625fe3c8 100644 (file)
--- a/src/syscall/zsyscall_darwin_arm64.go
+++ b/src/syscall/zsyscall_darwin_arm64.go
@@ -1886,6 +1886,64 @@ func fcntlPtr(fd int, cmd int, arg unsafe.Pointer) (val int, err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func unlinkat(fd int, path string, flags int) (err error) {
+       var _p0 *byte
+       _p0, err = BytePtrFromString(path)
+       if err != nil {
+               return
+       }
+       _, _, e1 := syscall(funcPC(libc_unlinkat_trampoline), uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(flags))
+       if e1 != 0 {
+               err = errnoErr(e1)
+       }
+       return
+}
+
+func libc_unlinkat_trampoline()
+
+//go:linkname libc_unlinkat libc_unlinkat
+//go:cgo_import_dynamic libc_unlinkat unlinkat "/usr/lib/libSystem.B.dylib"
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func openat(fd int, path string, flags int, perm uint32) (fdret int, err error) {
+       var _p0 *byte
+       _p0, err = BytePtrFromString(path)
+       if err != nil {
+               return
+       }
+       r0, _, e1 := syscall6(funcPC(libc_openat_trampoline), uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(flags), uintptr(perm), 0, 0)
+       fdret = int(r0)
+       if e1 != 0 {
+               err = errnoErr(e1)
+       }
+       return
+}
+
+func libc_openat_trampoline()
+
+//go:linkname libc_openat libc_openat
+//go:cgo_import_dynamic libc_openat openat "/usr/lib/libSystem.B.dylib"
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func fstatat(fd int, path string, stat *Stat_t, flags int) (err error) {
+       var _p0 *byte
+       _p0, err = BytePtrFromString(path)
+       if err != nil {
+               return
+       }
+       _, _, e1 := syscall6(funcPC(libc_fstatat64_trampoline), uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(stat)), uintptr(flags), 0, 0)
+       if e1 != 0 {
+               err = errnoErr(e1)
+       }
+       return
+}
+
+func libc_fstatat64_trampoline()
+
+//go:linkname libc_fstatat64 libc_fstatat64
+//go:cgo_import_dynamic libc_fstatat64 fstatat64 "/usr/lib/libSystem.B.dylib"
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func Gettimeofday(tp *Timeval) (err error) {
        _, _, e1 := rawSyscall(funcPC(libc_gettimeofday_trampoline), uintptr(unsafe.Pointer(tp)), 0, 0)
        if e1 != 0 {

diff --git a/src/syscall/zsyscall_darwin_arm64.s b/src/syscall/zsyscall_darwin_arm64.s
index 5d45a4bd9b47a4f209f5cc6e159be28b42ecfc11..98d0bdc3a8fbe1269bd54d840ef61014074370b0 100644 (file)
--- a/src/syscall/zsyscall_darwin_arm64.s
+++ b/src/syscall/zsyscall_darwin_arm64.s
@@ -223,6 +223,8 @@ TEXT ·libc_unmount_trampoline(SB),NOSPLIT,$0-0
        JMP     libc_unmount(SB)
 TEXT ·libc_write_trampoline(SB),NOSPLIT,$0-0
        JMP     libc_write(SB)
+TEXT ·libc_writev_trampoline(SB),NOSPLIT,$0-0
+       JMP     libc_writev(SB)
 TEXT ·libc_mmap_trampoline(SB),NOSPLIT,$0-0
        JMP     libc_mmap(SB)
 TEXT ·libc_munmap_trampoline(SB),NOSPLIT,$0-0
@@ -237,7 +239,11 @@ TEXT ·libc_exit_trampoline(SB),NOSPLIT,$0-0
        JMP     libc_exit(SB)
 TEXT ·libc_sysctl_trampoline(SB),NOSPLIT,$0-0
        JMP     libc_sysctl(SB)
-TEXT ·libc_writev_trampoline(SB),NOSPLIT,$0-0
-       JMP     libc_writev(SB)
+TEXT ·libc_unlinkat_trampoline(SB),NOSPLIT,$0-0
+       JMP     libc_unlinkat(SB)
+TEXT ·libc_openat_trampoline(SB),NOSPLIT,$0-0
+       JMP     libc_openat(SB)
+TEXT ·libc_fstatat64_trampoline(SB),NOSPLIT,$0-0
+       JMP     libc_fstatat64(SB)
 TEXT ·libc_gettimeofday_trampoline(SB),NOSPLIT,$0-0
        JMP     libc_gettimeofday(SB)