syscall: added support for linux/mips64{,le}

Syscall getdents64 is relatively new in linux/mips64, only since kernel
version 3.10. To support older kernel, syscall getdents is used for
mips64.

Change-Id: I892b05dff7d93e7ddb0d700abd6a5e6d4084ab4c
Reviewed-on: https://go-review.googlesource.com/14449
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Minux Ma <minux@golang.org>

src/syscall/asm_linux_mips64x.s

@@ -0,0 +1,104 @@
+// Copyright 2014 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.
+
+// +build linux
+// +build mips64 mips64le
+
+#include "textflag.h"
+
+//
+// System calls for mips64, Linux
+//
+
+// func Syscall(trap int64, a1, a2, a3 int64) (r1, r2, err int64);
+
+TEXT	·Syscall(SB),NOSPLIT,$0-56
+	JAL	runtime·entersyscall(SB)
+	MOVV	a1+8(FP), R4
+	MOVV	a2+16(FP), R5
+	MOVV	a3+24(FP), R6
+	MOVV	R0, R7
+	MOVV	R0, R8
+	MOVV	R0, R9
+	MOVV	trap+0(FP), R2	// syscall entry
+	SYSCALL
+	BEQ	R7, ok
+	MOVV	$-1, R1
+	MOVV	R1, r1+32(FP)	// r1
+	MOVV	R0, r2+40(FP)	// r2
+	MOVV	R2, err+48(FP)	// errno
+	JAL	runtime·exitsyscall(SB)
+	RET
+ok:
+	MOVV	R2, r1+32(FP)	// r1
+	MOVV	R3, r2+40(FP)	// r2
+	MOVV	R0, err+48(FP)	// errno
+	JAL	runtime·exitsyscall(SB)
+	RET
+
+TEXT ·Syscall6(SB),NOSPLIT,$0-80
+	JAL	runtime·entersyscall(SB)
+	MOVV	a1+8(FP), R4
+	MOVV	a2+16(FP), R5
+	MOVV	a3+24(FP), R6
+	MOVV	a4+32(FP), R7
+	MOVV	a5+40(FP), R8
+	MOVV	a6+48(FP), R9
+	MOVV	trap+0(FP), R2	// syscall entry
+	SYSCALL
+	BEQ	R7, ok6
+	MOVV	$-1, R1
+	MOVV	R1, r1+56(FP)	// r1
+	MOVV	R0, r2+64(FP)	// r2
+	MOVV	R2, err+72(FP)	// errno
+	JAL	runtime·exitsyscall(SB)
+	RET
+ok6:
+	MOVV	R2, r1+56(FP)	// r1
+	MOVV	R3, r2+64(FP)	// r2
+	MOVV	R0, err+72(FP)	// errno
+	JAL	runtime·exitsyscall(SB)
+	RET
+
+TEXT ·RawSyscall(SB),NOSPLIT,$0-56
+	MOVV	a1+8(FP), R4
+	MOVV	a2+16(FP), R5
+	MOVV	a3+24(FP), R6
+	MOVV	R0, R7
+	MOVV	R0, R8
+	MOVV	R0, R9
+	MOVV	trap+0(FP), R2	// syscall entry
+	SYSCALL
+	BEQ	R7, ok1
+	MOVV	$-1, R1
+	MOVV	R1, r1+32(FP)	// r1
+	MOVV	R0, r2+40(FP)	// r2
+	MOVV	R2, err+48(FP)	// errno
+	RET
+ok1:
+	MOVV	R2, r1+32(FP)	// r1
+	MOVV	R3, r2+40(FP)	// r2
+	MOVV	R0, err+48(FP)	// errno
+	RET
+
+TEXT ·RawSyscall6(SB),NOSPLIT,$0-80
+	MOVV	a1+8(FP), R4
+	MOVV	a2+16(FP), R5
+	MOVV	a3+24(FP), R6
+	MOVV	a4+32(FP), R7
+	MOVV	a5+40(FP), R8
+	MOVV	a6+48(FP), R9
+	MOVV	trap+0(FP), R2	// syscall entry
+	SYSCALL
+	BEQ	R7, ok2
+	MOVV	$-1, R1
+	MOVV	R1, r1+56(FP)	// r1
+	MOVV	R0, r2+64(FP)	// r2
+	MOVV	R2, err+72(FP)	// errno
+	RET
+ok2:
+	MOVV	R2, r1+56(FP)	// r1
+	MOVV	R3, r2+64(FP)	// r2
+	MOVV	R0, err+72(FP)	// errno
+	RET

src/syscall/syscall_linux.go

@@ -837,7 +837,7 @@ func Mount(source string, target string, fstype string, flags uintptr, data stri
 //sys	Fdatasync(fd int) (err error)
 //sys	Flock(fd int, how int) (err error)
 //sys	Fsync(fd int) (err error)
-//sys	Getdents(fd int, buf []byte) (n int, err error) = SYS_GETDENTS64
+//sys	Getdents(fd int, buf []byte) (n int, err error) = _SYS_getdents
 //sysnb	Getpgid(pid int) (pgid int, err error)
 
 func Getpgrp() (pid int) {

src/syscall/syscall_linux_386.go

@@ -9,7 +9,10 @@ package syscall
 
 import "unsafe"
 
-const _SYS_dup = SYS_DUP2
+const (
+	_SYS_dup      = SYS_DUP2
+	_SYS_getdents = SYS_GETDENTS64
+)
 
 func Getpagesize() int { return 4096 }
 

src/syscall/syscall_linux_amd64.go

@@ -4,7 +4,10 @@
 
 package syscall
 
-const _SYS_dup = SYS_DUP2
+const (
+	_SYS_dup      = SYS_DUP2
+	_SYS_getdents = SYS_GETDENTS64
+)
 
 //sys	Dup2(oldfd int, newfd int) (err error)
 //sys	Fchown(fd int, uid int, gid int) (err error)

src/syscall/syscall_linux_arm.go

@@ -6,7 +6,10 @@ package syscall
 
 import "unsafe"
 
-const _SYS_dup = SYS_DUP2
+const (
+	_SYS_dup      = SYS_DUP2
+	_SYS_getdents = SYS_GETDENTS64
+)
 
 func Getpagesize() int { return 4096 }
 

src/syscall/syscall_linux_arm64.go

@@ -4,7 +4,10 @@
 
 package syscall
 
-const _SYS_dup = SYS_DUP3
+const (
+	_SYS_dup      = SYS_DUP3
+	_SYS_getdents = SYS_GETDENTS64
+)
 
 //sys	Fchown(fd int, uid int, gid int) (err error)
 //sys	Fstat(fd int, stat *Stat_t) (err error)

src/syscall/syscall_linux_mips64x.go

@@ -0,0 +1,210 @@
+// 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.
+
+// +build linux
+// +build mips64 mips64le
+
+package syscall
+
+const (
+	_SYS_dup = SYS_DUP2
+
+	// Linux introduced getdents64 syscall for N64 ABI only in 3.10
+	// (May 21 2013, rev dec33abaafc89bcbd78f85fad0513170415a26d5),
+	// to support older kernels, we have to use getdents for mips64.
+	// Also note that struct dirent is different for these two.
+	// Lookup linux_dirent{,64} in kernel source code for details.
+	_SYS_getdents = SYS_GETDENTS
+)
+
+//sys	Dup2(oldfd int, newfd int) (err error)
+//sys	Fchown(fd int, uid int, gid int) (err error)
+//sys	Fstatfs(fd int, buf *Statfs_t) (err error)
+//sys	Ftruncate(fd int, length int64) (err error)
+//sysnb	Getegid() (egid int)
+//sysnb	Geteuid() (euid int)
+//sysnb	Getgid() (gid int)
+//sysnb	Getrlimit(resource int, rlim *Rlimit) (err error)
+//sysnb	Getuid() (uid int)
+//sysnb	InotifyInit() (fd int, err error)
+//sys	Lchown(path string, uid int, gid int) (err error)
+//sys	Listen(s int, n int) (err error)
+//sys	Pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64
+//sys	Pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64
+//sys	Seek(fd int, offset int64, whence int) (off int64, err error) = SYS_LSEEK
+//sys	Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) = SYS_PSELECT6
+//sys	sendfile(outfd int, infd int, offset *int64, count int) (written int, err error)
+//sys	Setfsgid(gid int) (err error)
+//sys	Setfsuid(uid int) (err error)
+//sysnb	Setregid(rgid int, egid int) (err error)
+//sysnb	Setresgid(rgid int, egid int, sgid int) (err error)
+//sysnb	Setresuid(ruid int, euid int, suid int) (err error)
+//sysnb	Setrlimit(resource int, rlim *Rlimit) (err error)
+//sysnb	Setreuid(ruid int, euid int) (err error)
+//sys	Shutdown(fd int, how int) (err error)
+//sys	Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error)
+//sys	Statfs(path string, buf *Statfs_t) (err error)
+//sys	SyncFileRange(fd int, off int64, n int64, flags int) (err error)
+//sys	Truncate(path string, length int64) (err error)
+//sys	accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error)
+//sys	accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error)
+//sys	bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
+//sys	connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
+//sysnb	getgroups(n int, list *_Gid_t) (nn int, err error)
+//sysnb	setgroups(n int, list *_Gid_t) (err error)
+//sys	getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error)
+//sys	setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error)
+//sysnb	socket(domain int, typ int, proto int) (fd int, err error)
+//sysnb	socketpair(domain int, typ int, proto int, fd *[2]int32) (err error)
+//sysnb	getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
+//sysnb	getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
+//sys	recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error)
+//sys	sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error)
+//sys	recvmsg(s int, msg *Msghdr, flags int) (n int, err error)
+//sys	sendmsg(s int, msg *Msghdr, flags int) (n int, err error)
+//sys	mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error)
+
+func Getpagesize() int { return 65536 }
+
+//sysnb	Gettimeofday(tv *Timeval) (err error)
+
+func Time(t *Time_t) (tt Time_t, err error) {
+	var tv Timeval
+	err = Gettimeofday(&tv)
+	if err != nil {
+		return 0, err
+	}
+	if t != nil {
+		*t = Time_t(tv.Sec)
+	}
+	return Time_t(tv.Sec), nil
+}
+
+func TimespecToNsec(ts Timespec) int64 { return int64(ts.Sec)*1e9 + int64(ts.Nsec) }
+
+func NsecToTimespec(nsec int64) (ts Timespec) {
+	ts.Sec = nsec / 1e9
+	ts.Nsec = nsec % 1e9
+	return
+}
+
+func TimevalToNsec(tv Timeval) int64 { return int64(tv.Sec)*1e9 + int64(tv.Usec)*1e3 }
+
+func NsecToTimeval(nsec int64) (tv Timeval) {
+	nsec += 999 // round up to microsecond
+	tv.Sec = nsec / 1e9
+	tv.Usec = nsec % 1e9 / 1e3
+	return
+}
+
+func Pipe(p []int) (err error) {
+	if len(p) != 2 {
+		return EINVAL
+	}
+	var pp [2]_C_int
+	err = pipe2(&pp, 0)
+	p[0] = int(pp[0])
+	p[1] = int(pp[1])
+	return
+}
+
+//sysnb pipe2(p *[2]_C_int, flags int) (err error)
+
+func Pipe2(p []int, flags int) (err error) {
+	if len(p) != 2 {
+		return EINVAL
+	}
+	var pp [2]_C_int
+	err = pipe2(&pp, flags)
+	p[0] = int(pp[0])
+	p[1] = int(pp[1])
+	return
+}
+
+func Ioperm(from int, num int, on int) (err error) {
+	return ENOSYS
+}
+
+func Iopl(level int) (err error) {
+	return ENOSYS
+}
+
+type stat_t struct {
+	Dev        uint32
+	Pad0       [3]int32
+	Ino        uint64
+	Mode       uint32
+	Nlink      uint32
+	Uid        uint32
+	Gid        uint32
+	Rdev       uint32
+	Pad1       [3]uint32
+	Size       int64
+	Atime      uint32
+	Atime_nsec uint32
+	Mtime      uint32
+	Mtime_nsec uint32
+	Ctime      uint32
+	Ctime_nsec uint32
+	Blksize    uint32
+	Pad2       uint32
+	Blocks     int64
+}
+
+//sys	fstat(fd int, st *stat_t) (err error)
+//sys	lstat(path string, st *stat_t) (err error)
+//sys	stat(path string, st *stat_t) (err error)
+
+func Fstat(fd int, s *Stat_t) (err error) {
+	st := &stat_t{}
+	err = fstat(fd, st)
+	fillStat_t(s, st)
+	return
+}
+
+func Lstat(path string, s *Stat_t) (err error) {
+	st := &stat_t{}
+	err = lstat(path, st)
+	fillStat_t(s, st)
+	return
+}
+
+func Stat(path string, s *Stat_t) (err error) {
+	st := &stat_t{}
+	err = stat(path, st)
+	fillStat_t(s, st)
+	return
+}
+
+func fillStat_t(s *Stat_t, st *stat_t) {
+	s.Dev = st.Dev
+	s.Ino = st.Ino
+	s.Mode = st.Mode
+	s.Nlink = st.Nlink
+	s.Uid = st.Uid
+	s.Gid = st.Gid
+	s.Rdev = st.Rdev
+	s.Size = st.Size
+	s.Atim = Timespec{int64(st.Atime), int64(st.Atime_nsec)}
+	s.Mtim = Timespec{int64(st.Mtime), int64(st.Mtime_nsec)}
+	s.Ctim = Timespec{int64(st.Ctime), int64(st.Ctime_nsec)}
+	s.Blksize = st.Blksize
+	s.Blocks = st.Blocks
+}
+
+func (r *PtraceRegs) PC() uint64 { return r.Regs[64] }
+
+func (r *PtraceRegs) SetPC(pc uint64) { r.Regs[64] = pc }
+
+func (iov *Iovec) SetLen(length int) {
+	iov.Len = uint64(length)
+}
+
+func (msghdr *Msghdr) SetControllen(length int) {
+	msghdr.Controllen = uint64(length)
+}
+
+func (cmsg *Cmsghdr) SetLen(length int) {
+	cmsg.Len = uint64(length)
+}

src/syscall/syscall_linux_ppc64x.go

@@ -7,7 +7,10 @@
 
 package syscall
 
-const _SYS_dup = SYS_DUP2
+const (
+	_SYS_dup      = SYS_DUP2
+	_SYS_getdents = SYS_GETDENTS64
+)
 
 //sys	Dup2(oldfd int, newfd int) (err error)
 //sys	Fchown(fd int, uid int, gid int) (err error)

src/syscall/types_linux.go

@@ -91,6 +91,8 @@ typedef struct user_regs PtraceRegs;
 typedef struct user_pt_regs PtraceRegs;
 #elif defined(__powerpc64__)
 typedef struct pt_regs PtraceRegs;
+#elif defined(__mips__)
+typedef struct user PtraceRegs;
 #else
 typedef struct user_regs_struct PtraceRegs;
 #endif

src/syscall/zsyscall_linux_386.go

@@ -505,7 +505,7 @@ func Getdents(fd int, buf []byte) (n int, err error) {
 	} else {
 		_p0 = unsafe.Pointer(&_zero)
 	}
-	r0, _, e1 := Syscall(SYS_GETDENTS64, uintptr(fd), uintptr(_p0), uintptr(len(buf)))
+	r0, _, e1 := Syscall(_SYS_getdents, uintptr(fd), uintptr(_p0), uintptr(len(buf)))
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)

src/syscall/zsyscall_linux_amd64.go

@@ -505,7 +505,7 @@ func Getdents(fd int, buf []byte) (n int, err error) {
 	} else {
 		_p0 = unsafe.Pointer(&_zero)
 	}
-	r0, _, e1 := Syscall(SYS_GETDENTS64, uintptr(fd), uintptr(_p0), uintptr(len(buf)))
+	r0, _, e1 := Syscall(_SYS_getdents, uintptr(fd), uintptr(_p0), uintptr(len(buf)))
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)

src/syscall/zsyscall_linux_arm.go

@@ -505,7 +505,7 @@ func Getdents(fd int, buf []byte) (n int, err error) {
 	} else {
 		_p0 = unsafe.Pointer(&_zero)
 	}
-	r0, _, e1 := Syscall(SYS_GETDENTS64, uintptr(fd), uintptr(_p0), uintptr(len(buf)))
+	r0, _, e1 := Syscall(_SYS_getdents, uintptr(fd), uintptr(_p0), uintptr(len(buf)))
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)

src/syscall/zsyscall_linux_arm64.go

@@ -505,7 +505,7 @@ func Getdents(fd int, buf []byte) (n int, err error) {
 	} else {
 		_p0 = unsafe.Pointer(&_zero)
 	}
-	r0, _, e1 := Syscall(SYS_GETDENTS64, uintptr(fd), uintptr(_p0), uintptr(len(buf)))
+	r0, _, e1 := Syscall(_SYS_getdents, uintptr(fd), uintptr(_p0), uintptr(len(buf)))
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)

src/syscall/zsyscall_linux_ppc64.go

@@ -505,7 +505,7 @@ func Getdents(fd int, buf []byte) (n int, err error) {
 	} else {
 		_p0 = unsafe.Pointer(&_zero)
 	}
-	r0, _, e1 := Syscall(SYS_GETDENTS64, uintptr(fd), uintptr(_p0), uintptr(len(buf)))
+	r0, _, e1 := Syscall(_SYS_getdents, uintptr(fd), uintptr(_p0), uintptr(len(buf)))
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)

src/syscall/zsyscall_linux_ppc64le.go

@@ -505,7 +505,7 @@ func Getdents(fd int, buf []byte) (n int, err error) {
 	} else {
 		_p0 = unsafe.Pointer(&_zero)
 	}
-	r0, _, e1 := Syscall(SYS_GETDENTS64, uintptr(fd), uintptr(_p0), uintptr(len(buf)))
+	r0, _, e1 := Syscall(_SYS_getdents, uintptr(fd), uintptr(_p0), uintptr(len(buf)))
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)