syscall: Only call varargs libc functions from C code.

From-SVN: r205321

libgo/Makefile.am

@@ -488,6 +488,7 @@ runtime_files = \
 	runtime/go-unsafe-newarray.c \
 	runtime/go-unsafe-pointer.c \
 	runtime/go-unwind.c \
+	runtime/go-varargs.c \
 	runtime/chan.c \
 	runtime/cpuprof.c \
 	runtime/env_posix.c \

libgo/Makefile.in

@@ -212,10 +212,10 @@ am__objects_6 = go-append.lo go-assert.lo go-assert-interface.lo \
 	go-type-float.lo go-type-identity.lo go-type-interface.lo \
 	go-type-string.lo go-typedesc-equal.lo go-typestring.lo \
 	go-unsafe-new.lo go-unsafe-newarray.lo go-unsafe-pointer.lo \
-	go-unwind.lo chan.lo cpuprof.lo env_posix.lo lfstack.lo \
-	$(am__objects_1) mcache.lo mcentral.lo $(am__objects_2) \
-	mfinal.lo mfixalloc.lo mgc0.lo mheap.lo msize.lo \
-	$(am__objects_3) panic.lo parfor.lo print.lo proc.lo \
+	go-unwind.lo go-varargs.lo chan.lo cpuprof.lo env_posix.lo \
+	lfstack.lo $(am__objects_1) mcache.lo mcentral.lo \
+	$(am__objects_2) mfinal.lo mfixalloc.lo mgc0.lo mheap.lo \
+	msize.lo $(am__objects_3) panic.lo parfor.lo print.lo proc.lo \
 	runtime.lo signal_unix.lo thread.lo yield.lo $(am__objects_4) \
 	iface.lo malloc.lo map.lo mprof.lo netpoll.lo reflect.lo \
 	runtime1.lo sema.lo sigqueue.lo string.lo time.lo \
@@ -819,6 +819,7 @@ runtime_files = \
 	runtime/go-unsafe-newarray.c \
 	runtime/go-unsafe-pointer.c \
 	runtime/go-unwind.c \
+	runtime/go-varargs.c \
 	runtime/chan.c \
 	runtime/cpuprof.c \
 	runtime/env_posix.c \
@@ -2451,6 +2452,7 @@ distclean-compile:
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/go-unsafe-newarray.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/go-unsafe-pointer.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/go-unwind.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/go-varargs.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/iface.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/lfstack.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/lock_futex.Plo@am__quote@
@@ -2979,6 +2981,13 @@ go-unwind.lo: runtime/go-unwind.c
 @AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
 @am__fastdepCC_FALSE@	$(LIBTOOL)  --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -c -o go-unwind.lo `test -f 'runtime/go-unwind.c' || echo '$(srcdir)/'`runtime/go-unwind.c
 
+go-varargs.lo: runtime/go-varargs.c
+@am__fastdepCC_TRUE@	$(LIBTOOL)  --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT go-varargs.lo -MD -MP -MF $(DEPDIR)/go-varargs.Tpo -c -o go-varargs.lo `test -f 'runtime/go-varargs.c' || echo '$(srcdir)/'`runtime/go-varargs.c
+@am__fastdepCC_TRUE@	$(am__mv) $(DEPDIR)/go-varargs.Tpo $(DEPDIR)/go-varargs.Plo
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	source='runtime/go-varargs.c' object='go-varargs.lo' libtool=yes @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(LIBTOOL)  --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -c -o go-varargs.lo `test -f 'runtime/go-varargs.c' || echo '$(srcdir)/'`runtime/go-varargs.c
+
 chan.lo: runtime/chan.c
 @am__fastdepCC_TRUE@	$(LIBTOOL)  --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT chan.lo -MD -MP -MF $(DEPDIR)/chan.Tpo -c -o chan.lo `test -f 'runtime/chan.c' || echo '$(srcdir)/'`runtime/chan.c
 @am__fastdepCC_TRUE@	$(am__mv) $(DEPDIR)/chan.Tpo $(DEPDIR)/chan.Plo

libgo/config.h.in

@@ -177,6 +177,9 @@
 /* Define to 1 if the system has the type `off64_t'. */
 #undef HAVE_OFF64_T
 
+/* Define to 1 if you have the `open64' function. */
+#undef HAVE_OPEN64
+
 /* Define to 1 if you have the `openat' function. */
 #undef HAVE_OPENAT
 

libgo/configure

@@ -14718,7 +14718,7 @@ else
 fi
 
 
-for ac_func in accept4 dup3 epoll_create1 faccessat fallocate fchmodat fchownat futimesat getxattr inotify_add_watch inotify_init inotify_init1 inotify_rm_watch listxattr mkdirat mknodat openat pipe2 removexattr renameat setxattr sync_file_range splice tee unlinkat unshare utimensat
+for ac_func in accept4 dup3 epoll_create1 faccessat fallocate fchmodat fchownat futimesat getxattr inotify_add_watch inotify_init inotify_init1 inotify_rm_watch listxattr mkdirat mknodat open64 openat pipe2 removexattr renameat setxattr sync_file_range splice tee unlinkat unshare utimensat
 do :
   as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
 ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"

libgo/configure.ac

@@ -506,7 +506,7 @@ AC_CHECK_FUNCS(strerror_r strsignal wait4 mincore setenv dl_iterate_phdr)
 AM_CONDITIONAL(HAVE_STRERROR_R, test "$ac_cv_func_strerror_r" = yes)
 AM_CONDITIONAL(HAVE_WAIT4, test "$ac_cv_func_wait4" = yes)
 
-AC_CHECK_FUNCS(accept4 dup3 epoll_create1 faccessat fallocate fchmodat fchownat futimesat getxattr inotify_add_watch inotify_init inotify_init1 inotify_rm_watch listxattr mkdirat mknodat openat pipe2 removexattr renameat setxattr sync_file_range splice tee unlinkat unshare utimensat)
+AC_CHECK_FUNCS(accept4 dup3 epoll_create1 faccessat fallocate fchmodat fchownat futimesat getxattr inotify_add_watch inotify_init inotify_init1 inotify_rm_watch listxattr mkdirat mknodat open64 openat pipe2 removexattr renameat setxattr sync_file_range splice tee unlinkat unshare utimensat)
 AC_TYPE_OFF_T
 AC_CHECK_TYPES([loff_t])
 

libgo/go/syscall/exec_unix.go

@@ -30,7 +30,7 @@ import (
 //chdir(path *byte) _C_int
 
 //sysnb	raw_fcntl(fd int, cmd int, arg int) (val int, err Errno)
-//fcntl(fd _C_int, cmd _C_int, arg _C_int) _C_int
+//__go_fcntl(fd _C_int, cmd _C_int, arg _C_int) _C_int
 
 //sysnb	raw_close(fd int) (err Errno)
 //close(fd _C_int) _C_int

libgo/go/syscall/libcall_linux.go

@@ -9,7 +9,7 @@ package syscall
 import "unsafe"
 
 //sys	Openat(dirfd int, path string, flags int, mode uint32) (fd int, err error)
-//openat(dirfd _C_int, path *byte, flags _C_int, mode Mode_t) _C_int
+//__go_openat(dirfd _C_int, path *byte, flags _C_int, mode Mode_t) _C_int
 
 //sys	futimesat(dirfd int, path *byte, times *[2]Timeval) (err error)
 //futimesat(dirfd _C_int, path *byte, times *[2]Timeval) _C_int

libgo/go/syscall/libcall_posix.go

@@ -206,7 +206,7 @@ func FDZero(set *FdSet) {
 //fchown(fd _C_int, uid Uid_t, gid Gid_t) _C_int
 
 //sys	fcntl(fd int, cmd int, arg int) (val int, err error)
-//fcntl(fd _C_int, cmd _C_int, arg _C_int) _C_int
+//__go_fcntl(fd _C_int, cmd _C_int, arg _C_int) _C_int
 
 //sys	Fdatasync(fd int) (err error)
 //fdatasync(fd _C_int) _C_int

libgo/go/syscall/libcall_posix_largefile.go

@@ -19,7 +19,7 @@ package syscall
 //mmap64(addr *byte, length Size_t, prot _C_int, flags _C_int, fd _C_int, offset Offset_t) *byte
 
 //sys	Open(path string, mode int, perm uint32) (fd int, err error)
-//open64(path *byte, mode _C_int, perm Mode_t) _C_int
+//__go_open64(path *byte, mode _C_int, perm Mode_t) _C_int
 
 //sys	Pread(fd int, p []byte, offset int64) (n int, err error)
 //pread64(fd _C_int, buf *byte, count Size_t, offset Offset_t) Ssize_t

libgo/go/syscall/libcall_posix_regfile.go

@@ -20,7 +20,7 @@ package syscall
 //mmap(addr *byte, length Size_t, prot _C_int, flags _C_int, fd _C_int, offset Offset_t) *byte
 
 //sys	Open(path string, mode int, perm uint32) (fd int, err error)
-//open(path *byte, mode _C_int, perm Mode_t) _C_int
+//__go_open(path *byte, mode _C_int, perm Mode_t) _C_int
 
 //sys	Pread(fd int, p []byte, offset int64) (n int, err error)
 //pread(fd _C_int, buf *byte, count Size_t, offset Offset_t) Ssize_t

libgo/runtime/go-varargs.c

+/* go-varargs.c -- functions for calling C varargs functions.
+
+   Copyright 2013 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 "config.h"
+
+#include <sys/types.h>
+#include <fcntl.h>
+
+/* The syscall package calls C functions.  The Go compiler can not
+   represent a C varargs functions.  On some systems it's important
+   that the declaration of a function match the call.  This function
+   holds non-varargs C functions that the Go code can call.  */
+
+int
+__go_open (char *path, int mode, mode_t perm)
+{
+  return open (path, mode, perm);
+}
+
+int
+__go_fcntl (int fd, int cmd, int arg)
+{
+  return fcntl (fd, cmd, arg);
+}
+
+#ifdef HAVE_OPEN64
+
+int
+__go_open64 (char *path, int mode, mode_t perm)
+{
+  return open64 (path, mode, perm);
+}
+
+#endif
+
+#ifdef HAVE_OPENAT
+
+int
+__go_openat (int fd, char *path, int flags, mode_t mode)
+{
+  return openat (fd, path, flags, mode);
+}
+
+#endif