-03e53c928ebaa15a915eb1e1b07f193d83fc2852
+d56717f8c434b3d6b753c027487681769e201e14
The first line of this file holds the git revision number of the last
merge done from the gofrontend repository.
$(SHELL) $(srcdir)/mvifdiff.sh epoll.go.tmp epoll.go
$(STAMP) $@
+if LIBGO_IS_LINUX
+syscall_lib_clone_lo = syscall/clone_linux.lo
+else
+syscall_lib_clone_lo =
+endif
+
libgo_go_objs = \
bufio.lo \
bytes.lo \
strings/index.lo \
sync.lo \
syscall.lo \
+ $(syscall_lib_clone_lo) \
syscall/errno.lo \
syscall/signame.lo \
syscall/wait.lo \
$(BUILDDEPS)
syscall.lo:
$(BUILDPACKAGE)
+syscall/clone_linux.lo: go/syscall/clone_linux.c runtime.inc
+ @$(MKDIR_P) syscall
+ $(LTCOMPILE) -c -o $@ $<
syscall/errno.lo: go/syscall/errno.c runtime.inc
@$(MKDIR_P) syscall
$(LTCOMPILE) -c -o $@ $<
am_libnetgo_a_OBJECTS =
libnetgo_a_OBJECTS = $(am_libnetgo_a_OBJECTS)
LTLIBRARIES = $(toolexeclib_LTLIBRARIES)
-am__DEPENDENCIES_1 = bufio.lo bytes.lo bytes/index.lo context.lo \
+@LIBGO_IS_LINUX_TRUE@am__DEPENDENCIES_1 = syscall/clone_linux.lo
+am__DEPENDENCIES_2 = bufio.lo bytes.lo bytes/index.lo context.lo \
crypto.lo encoding.lo errors.lo expvar.lo flag.lo fmt.lo \
hash.lo html.lo image.lo io.lo log.lo math.lo mime.lo net.lo \
os.lo path.lo reflect-go.lo reflect/makefunc_ffi_c.lo \
regexp.lo runtime-go.lo sort.lo strconv.lo strings.lo \
- strings/index.lo sync.lo syscall.lo syscall/errno.lo \
- syscall/signame.lo syscall/wait.lo testing.lo time-go.lo \
- unicode.lo archive/tar.lo archive/zip.lo compress/bzip2.lo \
- compress/flate.lo compress/gzip.lo compress/lzw.lo \
- compress/zlib.lo container/heap.lo container/list.lo \
- container/ring.lo crypto/aes.lo crypto/cipher.lo crypto/des.lo \
- crypto/dsa.lo crypto/ecdsa.lo crypto/elliptic.lo \
- crypto/hmac.lo crypto/md5.lo crypto/rand.lo crypto/rc4.lo \
- crypto/rsa.lo crypto/sha1.lo crypto/sha256.lo crypto/sha512.lo \
- crypto/subtle.lo crypto/tls.lo crypto/x509.lo \
+ strings/index.lo sync.lo syscall.lo $(am__DEPENDENCIES_1) \
+ syscall/errno.lo syscall/signame.lo syscall/wait.lo testing.lo \
+ time-go.lo unicode.lo archive/tar.lo archive/zip.lo \
+ compress/bzip2.lo compress/flate.lo compress/gzip.lo \
+ compress/lzw.lo compress/zlib.lo container/heap.lo \
+ container/list.lo container/ring.lo crypto/aes.lo \
+ crypto/cipher.lo crypto/des.lo crypto/dsa.lo crypto/ecdsa.lo \
+ crypto/elliptic.lo crypto/hmac.lo crypto/md5.lo crypto/rand.lo \
+ crypto/rc4.lo crypto/rsa.lo crypto/sha1.lo crypto/sha256.lo \
+ crypto/sha512.lo crypto/subtle.lo crypto/tls.lo crypto/x509.lo \
crypto/x509/pkix.lo database/sql.lo database/sql/driver.lo \
debug/dwarf.lo debug/elf.lo debug/gosym.lo debug/macho.lo \
debug/pe.lo debug/plan9obj.lo encoding/ascii85.lo \
text/scanner.lo text/tabwriter.lo text/template.lo \
text/template/parse.lo testing/iotest.lo testing/quick.lo \
unicode/utf16.lo unicode/utf8.lo
-am__DEPENDENCIES_2 =
-am__DEPENDENCIES_3 = $(am__DEPENDENCIES_1) \
- ../libbacktrace/libbacktrace.la $(am__DEPENDENCIES_2) \
- $(am__DEPENDENCIES_2) $(am__DEPENDENCIES_2) \
- $(am__DEPENDENCIES_2) $(am__DEPENDENCIES_2)
-libgo_llgo_la_DEPENDENCIES = $(am__DEPENDENCIES_3)
+am__DEPENDENCIES_3 =
+am__DEPENDENCIES_4 = $(am__DEPENDENCIES_2) \
+ ../libbacktrace/libbacktrace.la $(am__DEPENDENCIES_3) \
+ $(am__DEPENDENCIES_3) $(am__DEPENDENCIES_3) \
+ $(am__DEPENDENCIES_3) $(am__DEPENDENCIES_3)
+libgo_llgo_la_DEPENDENCIES = $(am__DEPENDENCIES_4)
@HAVE_SYS_MMAN_H_FALSE@am__objects_1 = mem_posix_memalign.lo
@HAVE_SYS_MMAN_H_TRUE@am__objects_1 = mem.lo
@LIBGO_IS_LINUX_FALSE@@LIBGO_IS_SOLARIS_FALSE@am__objects_2 = netpoll_kqueue.lo
$(LIBTOOLFLAGS) --mode=link $(CCLD) $(AM_CFLAGS) $(CFLAGS) \
$(libgo_llgo_la_LDFLAGS) $(LDFLAGS) -o $@
@GOC_IS_LLGO_TRUE@am_libgo_llgo_la_rpath = -rpath $(toolexeclibdir)
-libgo_la_DEPENDENCIES = $(am__DEPENDENCIES_3)
+libgo_la_DEPENDENCIES = $(am__DEPENDENCIES_4)
am_libgo_la_OBJECTS = $(am__objects_6)
libgo_la_OBJECTS = $(am_libgo_la_OBJECTS)
libgo_la_LINK = $(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) \
$(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) \
$(CPPFLAGS) $(OSCFLAGS) -O
+@LIBGO_IS_LINUX_FALSE@syscall_lib_clone_lo =
+@LIBGO_IS_LINUX_TRUE@syscall_lib_clone_lo = syscall/clone_linux.lo
libgo_go_objs = \
bufio.lo \
bytes.lo \
strings/index.lo \
sync.lo \
syscall.lo \
+ $(syscall_lib_clone_lo) \
syscall/errno.lo \
syscall/signame.lo \
syscall/wait.lo \
$(BUILDDEPS)
syscall.lo:
$(BUILDPACKAGE)
+syscall/clone_linux.lo: go/syscall/clone_linux.c runtime.inc
+ @$(MKDIR_P) syscall
+ $(LTCOMPILE) -c -o $@ $<
syscall/errno.lo: go/syscall/errno.c runtime.inc
@$(MKDIR_P) syscall
$(LTCOMPILE) -c -o $@ $<
--- /dev/null
+/* clone_linux.c -- consistent wrapper around Linux clone syscall
+
+ Copyright 2016 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. */
+
+#include <errno.h>
+#include <asm/ptrace.h>
+#include <sys/syscall.h>
+
+#include "runtime.h"
+
+long rawClone (unsigned long flags, void *child_stack, void *ptid, void *ctid, struct pt_regs *regs) __asm__ (GOSYM_PREFIX "syscall.rawClone");
+
+long
+rawClone (unsigned long flags, void *child_stack, void *ptid, void *ctid, struct pt_regs *regs)
+{
+#if defined(__arc__) || defined(__aarch64__) || defined(__arm__) || defined(__mips__) || defined(__hppa__) || defined(__powerpc__) || defined(__score__) || defined(__i386__) || defined(__xtensa__)
+ // CLONE_BACKWARDS
+ return syscall(__NR_clone, flags, child_stack, ptid, regs, ctid);
+#elif defined(__s390__) || defined(__cris__)
+ // CLONE_BACKWARDS2
+ return syscall(__NR_clone, child_stack, flags, ptid, ctid, regs);
+#elif defined(__microblaze__)
+ // CLONE_BACKWARDS3
+ return syscall(__NR_clone, flags, child_stack, 0, ptid, ctid, regs);
+#elif defined(__sparc__)
+
+ /* SPARC has a unique return value convention:
+
+ Parent --> %o0 == child's pid, %o1 == 0
+ Child --> %o0 == parent's pid, %o1 == 1
+
+ Translate this to look like a normal clone. */
+
+# if defined(__arch64__)
+
+# define SYSCALL_STRING \
+ "ta 0x6d;" \
+ "bcc,pt %%xcc, 1f;" \
+ " mov 0, %%g1;" \
+ "sub %%g0, %%o0, %%o0;" \
+ "mov 1, %%g1;" \
+ "1:"
+
+# define SYSCALL_CLOBBERS \
+ "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", \
+ "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", \
+ "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23", \
+ "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31", \
+ "f32", "f34", "f36", "f38", "f40", "f42", "f44", "f46", \
+ "f48", "f50", "f52", "f54", "f56", "f58", "f60", "f62", \
+ "cc", "memory"
+
+# else /* __arch64__ */
+
+# define SYSCALL_STRING \
+ "ta 0x10;" \
+ "bcc 1f;" \
+ " mov 0, %%g1;" \
+ "sub %%g0, %%o0, %%o0;" \
+ "mov 1, %%g1;" \
+ "1:"
+
+# define SYSCALL_CLOBBERS \
+ "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", \
+ "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", \
+ "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23", \
+ "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31", \
+ "cc", "memory"
+
+# endif /* __arch64__ */
+
+ register long o0 __asm__ ("o0") = (long)flags;
+ register long o1 __asm__ ("o1") = (long)child_stack;
+ register long o2 __asm__ ("o2") = (long)ptid;
+ register long o3 __asm__ ("o3") = (long)ctid;
+ register long o4 __asm__ ("o4") = (long)regs;
+ register long g1 __asm__ ("g1") = __NR_clone;
+
+ __asm __volatile (SYSCALL_STRING :
+ "=r" (g1), "=r" (o0), "=r" (o1) :
+ "0" (g1), "1" (o0), "2" (o1),
+ "r" (o2), "r" (o3), "r" (o4) :
+ SYSCALL_CLOBBERS);
+
+ if (__builtin_expect(g1 != 0, 0))
+ {
+ errno = -o0;
+ o0 = -1L;
+ }
+ else
+ o0 &= (o1 - 1);
+
+ return o0;
+
+#else
+ return syscall(__NR_clone, flags, child_stack, ptid, ctid, regs);
+#endif
+}
package syscall
import (
- "runtime"
"unsafe"
)
func runtime_BeforeFork()
func runtime_AfterFork()
+// Implemented in clone_linux.c
+func rawClone(flags _C_ulong, child_stack *byte, ptid *Pid_t, ctid *Pid_t, regs unsafe.Pointer) _C_long
+
// Fork, dup fd onto 0..len(fd), and exec(argv0, argvv, envv) in child.
// If a dup or exec fails, write the errno error to pipe.
// (Pipe is close-on-exec so if exec succeeds, it will be closed.)
// declarations require heap allocation (e.g., err1).
var (
r1 uintptr
+ r2 _C_long
err1 Errno
err2 Errno
nextfd int
// About to call fork.
// No more allocation or calls of non-assembly functions.
runtime_BeforeFork()
- if runtime.GOARCH == "s390x" || runtime.GOARCH == "s390" {
- r1, _, err1 = RawSyscall6(SYS_CLONE, 0, uintptr(SIGCHLD)|sys.Cloneflags, 0, 0, 0, 0)
- } else {
- r1, _, err1 = RawSyscall6(SYS_CLONE, uintptr(SIGCHLD)|sys.Cloneflags, 0, 0, 0, 0, 0)
- }
- if err1 != 0 {
+ r2 = rawClone(_C_ulong(uintptr(SIGCHLD)|sys.Cloneflags), nil, nil, nil, unsafe.Pointer(nil))
+ if r2 < 0 {
runtime_AfterFork()
- return 0, err1
+ return 0, GetErrno()
}
- if r1 != 0 {
+ if r2 != 0 {
// parent; return PID
runtime_AfterFork()
- pid = int(r1)
+ pid = int(r2)
if sys.UidMappings != nil || sys.GidMappings != nil {
Close(p[0])
sizeof_long=`grep '^const ___SIZEOF_LONG__ = ' gen-sysinfo.go | sed -e 's/.*= //'`
if test "$sizeof_long" = "4"; then
echo "type _C_long int32" >> ${OUT}
+ echo "type _C_ulong uint32" >> ${OUT}
elif test "$sizeof_long" = "8"; then
echo "type _C_long int64" >> ${OUT}
+ echo "type _C_ulong uint64" >> ${OUT}
else
echo 1>&2 "mksysinfo.sh: could not determine size of long (got $sizeof_long)"
exit 1
projects / platform / upstream / gcc.git / commitdiff