[MicroBlaze]: Move MicroBlaze from ports to sysdeps.

2014-02-17  David Holsgrove <david.holsgrove@xilinx.com>

        * sysdeps/microblaze: Move directory from ports/sysdeps/microblaze.
        * sysdeps/unix/sysv/linux/microblaze: Move directory from
          ports/sysdeps/unix/sysv/linux/microblaze.
        * README: Add missing listing for microblaze*-*-linux-gnu.

Signed-off-by: David Holsgrove <david.holsgrove@xilinx.com>

1 files changed, 84 insertions, 0 deletions

diff --git a/sysdeps/microblaze/start.S b/sysdeps/microblaze/start.S
new file mode 100644
index 0000000000..729569db90
--- /dev/null
+++ b/sysdeps/microblaze/start.S
@@ -0,0 +1,84 @@
+/* Copyright (C) 1995-2014 Free Software Foundation, Inc.
+
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   In addition to the permissions in the GNU Lesser General Public
+   License, the Free Software Foundation gives you unlimited
+   permission to link the compiled version of this file with other
+   programs, and to distribute those programs without any restriction
+   coming from the use of this file. (The GNU Lesser General Public
+   License restrictions do apply in other respects; for example, they
+   cover modification of the file, and distribution when not linked
+   into another program.)
+
+   Note that people who make modified versions of this file are not
+   obligated to grant this special exception for their modified
+   versions; it is their choice whether to do so. The GNU Lesser
+   General Public License gives permission to release a modified
+   version without this exception; this exception also makes it
+   possible to release a modified version which carries forward this
+   exception.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library.  If not, see
+   <http://www.gnu.org/licenses/>.  */
+
+    .text
+    .globl _start
+    .type _start,@function
+_start:
+    /* On entry the stack contains the following args:
+         r1+0 - argc
+         r1+4 - argv[0]
+         ...
+         r1+4*(argc-1) - argv[argc-1]
+         r1+4*argc - NULL
+         r1+4*argc + 4 - envp[0]
+         ...
+         NULL
+    */
+    addk    r3,r0,r0
+    addk    r5,r1,r0
+1:
+    addik   r5,r5,4
+    lw      r4,r5,r0
+    bneid   r4,1b
+    addik   r3,r3,1
+    addik   r6,r3,-1
+    sw      r6,r1,r0
+    addik   r7,r1,4
+    addik   r1,r1,-24
+#ifdef SHARED
+    /* Setup PIC.  */
+    mfs     r20,rpc
+    addik   r20,r20,_GLOBAL_OFFSET_TABLE_+8
+    lwi     r5,r20,main@GOT
+    lwi     r8,r20,__libc_csu_init@GOT
+    lwi     r9,r20,__libc_csu_fini@GOT
+    brid    __libc_start_main@PLT
+    addk    r10,r0,r0
+#else
+    addik   r5,r0,main
+    addik   r8,r0,__libc_csu_init
+    addik   r9,r0,__libc_csu_fini
+    brid    __libc_start_main
+    addk    r10,r0,r0
+#endif
+
+/* Define a symbol for the first piece of initialized data.  */
+    .data
+    .globl __data_start
+__data_start:
+    .long 0
+    .weak data_start
+    data_start = __data_start