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syscall, net: Fix GNU/Linux netlink code for big-endian systems.
authorian <ian@138bc75d-0d04-0410-961f-82ee72b054a4>
Tue, 3 Apr 2012 23:45:10 +0000 (23:45 +0000)
committerian <ian@138bc75d-0d04-0410-961f-82ee72b054a4>
Tue, 3 Apr 2012 23:45:10 +0000 (23:45 +0000)
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_7-branch@186124 138bc75d-0d04-0410-961f-82ee72b054a4

libgo/Makefile.am
libgo/Makefile.in
libgo/configure
libgo/configure.ac
libgo/go/net/interface_linux.go
libgo/go/syscall/netlink_linux.go
libgo/testsuite/Makefile.in

index 11a650b..e19cdf0 100644 (file)
@@ -1559,6 +1559,7 @@ s-syscall_arch: Makefile
        echo "package syscall" > syscall_arch.go.tmp
        echo 'const ARCH = "'$(GOARCH)'"' >> syscall_arch.go.tmp
        echo 'const OS = "'$(GOOS)'"' >> syscall_arch.go.tmp
+       echo 'const BigEndian = $(GO_BIGENDIAN)' >> syscall_arch.go.tmp
        $(SHELL) $(srcdir)/../move-if-change syscall_arch.go.tmp syscall_arch.go
        $(STAMP) $@
 
index f790205..c7740cf 100644 (file)
@@ -369,6 +369,7 @@ GOARCH = @GOARCH@
 GOC = @GOC@
 GOCFLAGS = $(CFLAGS)
 GOOS = @GOOS@
+GO_BIGENDIAN = @GO_BIGENDIAN@
 GO_LIBCALL_OS_ARCH_FILE = @GO_LIBCALL_OS_ARCH_FILE@
 GO_LIBCALL_OS_FILE = @GO_LIBCALL_OS_FILE@
 GO_SYSCALL_OS_ARCH_FILE = @GO_SYSCALL_OS_ARCH_FILE@
@@ -4371,6 +4372,7 @@ s-syscall_arch: Makefile
        echo "package syscall" > syscall_arch.go.tmp
        echo 'const ARCH = "'$(GOARCH)'"' >> syscall_arch.go.tmp
        echo 'const OS = "'$(GOOS)'"' >> syscall_arch.go.tmp
+       echo 'const BigEndian = $(GO_BIGENDIAN)' >> syscall_arch.go.tmp
        $(SHELL) $(srcdir)/../move-if-change syscall_arch.go.tmp syscall_arch.go
        $(STAMP) $@
 
index 34125ec..b57ba94 100755 (executable)
@@ -612,6 +612,7 @@ HAVE_STRERROR_R_FALSE
 HAVE_STRERROR_R_TRUE
 HAVE_SYS_MMAN_H_FALSE
 HAVE_SYS_MMAN_H_TRUE
+GO_BIGENDIAN
 PTHREAD_LIBS
 PTHREAD_CFLAGS
 NET_LIBS
@@ -11100,7 +11101,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11103 "configure"
+#line 11104 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11206,7 +11207,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11209 "configure"
+#line 11210 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -14408,6 +14409,12 @@ $as_echo "#define AC_APPLE_UNIVERSAL_BUILD 1" >>confdefs.h
  presetting ac_cv_c_bigendian=no (or yes) will help" "$LINENO" 5 ;;
  esac
 
+case $ac_cv_c_bigendian in
+  yes) GO_BIGENDIAN=true ;;
+  no) GO_BIGENDIAN=false ;;
+  *) as_fn_error "unknown endianness" "$LINENO" 5 ;;
+esac
+
 
 
 
index b47d17d..8be0391 100644 (file)
@@ -400,6 +400,12 @@ dnl Test if -lrt is required for sched_yield.
 AC_SEARCH_LIBS([sched_yield], [rt])
 
 AC_C_BIGENDIAN
+case $ac_cv_c_bigendian in
+  yes) GO_BIGENDIAN=true ;;
+  no) GO_BIGENDIAN=false ;;
+  *) AC_MSG_ERROR([unknown endianness]) ;;
+esac
+AC_SUBST(GO_BIGENDIAN)
 
 GCC_CHECK_UNWIND_GETIPINFO
 
index 825b202..0d7017f 100644 (file)
@@ -64,7 +64,11 @@ func newLink(ifim *syscall.IfInfomsg, attrs []syscall.NetlinkRouteAttr) Interfac
                case syscall.IFLA_IFNAME:
                        ifi.Name = string(a.Value[:len(a.Value)-1])
                case syscall.IFLA_MTU:
-                       ifi.MTU = int(uint32(a.Value[3])<<24 | uint32(a.Value[2])<<16 | uint32(a.Value[1])<<8 | uint32(a.Value[0]))
+                       if syscall.BigEndian {
+                               ifi.MTU = int(uint32(a.Value[0])<<24 | uint32(a.Value[1])<<16 | uint32(a.Value[2])<<8 | uint32(a.Value[3]))
+                       } else {
+                               ifi.MTU = int(uint32(a.Value[3])<<24 | uint32(a.Value[2])<<16 | uint32(a.Value[1])<<8 | uint32(a.Value[0]))
+                       }
                }
        }
        return ifi
@@ -196,7 +200,12 @@ func parseProcNetIGMP(path string, ifi *Interface) []Addr {
                                for i := 0; i+1 < len(f[0]); i += 2 {
                                        b[i/2], _ = xtoi2(f[0][i:i+2], 0)
                                }
-                               ifma := IPAddr{IP: IPv4(b[3], b[2], b[1], b[0])}
+                               var ifma IPAddr
+                               if syscall.BigEndian {
+                                       ifma = IPAddr{IP: IPv4(b[0], b[1], b[2], b[3])}
+                               } else {
+                                       ifma = IPAddr{IP: IPv4(b[3], b[2], b[1], b[0])}
+                               }
                                ifmat = append(ifmat, ifma.toAddr())
                        }
                }
index 8683bb3..1c99a81 100644 (file)
@@ -30,23 +30,43 @@ type NetlinkRouteRequest struct {
 
 func (rr *NetlinkRouteRequest) toWireFormat() []byte {
        b := make([]byte, rr.Header.Len)
-       b[0] = byte(rr.Header.Len)
-       b[1] = byte(rr.Header.Len >> 8)
-       b[2] = byte(rr.Header.Len >> 16)
-       b[3] = byte(rr.Header.Len >> 24)
-       b[4] = byte(rr.Header.Type)
-       b[5] = byte(rr.Header.Type >> 8)
-       b[6] = byte(rr.Header.Flags)
-       b[7] = byte(rr.Header.Flags >> 8)
-       b[8] = byte(rr.Header.Seq)
-       b[9] = byte(rr.Header.Seq >> 8)
-       b[10] = byte(rr.Header.Seq >> 16)
-       b[11] = byte(rr.Header.Seq >> 24)
-       b[12] = byte(rr.Header.Pid)
-       b[13] = byte(rr.Header.Pid >> 8)
-       b[14] = byte(rr.Header.Pid >> 16)
-       b[15] = byte(rr.Header.Pid >> 24)
-       b[16] = byte(rr.Data.Family)
+       if BigEndian {
+               b[0] = byte(rr.Header.Len >> 24)
+               b[1] = byte(rr.Header.Len >> 16)
+               b[2] = byte(rr.Header.Len >> 8)
+               b[3] = byte(rr.Header.Len)
+               b[4] = byte(rr.Header.Type >> 8)
+               b[5] = byte(rr.Header.Type)
+               b[6] = byte(rr.Header.Flags >> 8)
+               b[7] = byte(rr.Header.Flags)
+               b[8] = byte(rr.Header.Seq >> 24)
+               b[9] = byte(rr.Header.Seq >> 16)
+               b[10] = byte(rr.Header.Seq >> 8)
+               b[11] = byte(rr.Header.Seq)
+               b[12] = byte(rr.Header.Pid >> 24)
+               b[13] = byte(rr.Header.Pid >> 16)
+               b[14] = byte(rr.Header.Pid >> 8)
+               b[15] = byte(rr.Header.Pid)
+               b[16] = byte(rr.Data.Family)
+       } else {
+               b[0] = byte(rr.Header.Len)
+               b[1] = byte(rr.Header.Len >> 8)
+               b[2] = byte(rr.Header.Len >> 16)
+               b[3] = byte(rr.Header.Len >> 24)
+               b[4] = byte(rr.Header.Type)
+               b[5] = byte(rr.Header.Type >> 8)
+               b[6] = byte(rr.Header.Flags)
+               b[7] = byte(rr.Header.Flags >> 8)
+               b[8] = byte(rr.Header.Seq)
+               b[9] = byte(rr.Header.Seq >> 8)
+               b[10] = byte(rr.Header.Seq >> 16)
+               b[11] = byte(rr.Header.Seq >> 24)
+               b[12] = byte(rr.Header.Pid)
+               b[13] = byte(rr.Header.Pid >> 8)
+               b[14] = byte(rr.Header.Pid >> 16)
+               b[15] = byte(rr.Header.Pid >> 24)
+               b[16] = byte(rr.Data.Family)
+       }
        return b
 }
 
index 4628fdd..56808ef 100644 (file)
@@ -86,6 +86,7 @@ GOARCH = @GOARCH@
 GOC = @GOC@
 GOCFLAGS = @GOCFLAGS@
 GOOS = @GOOS@
+GO_BIGENDIAN = @GO_BIGENDIAN@
 GO_LIBCALL_OS_ARCH_FILE = @GO_LIBCALL_OS_ARCH_FILE@
 GO_LIBCALL_OS_FILE = @GO_LIBCALL_OS_FILE@
 GO_SYSCALL_OS_ARCH_FILE = @GO_SYSCALL_OS_ARCH_FILE@