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authorWaldemar Brodkorb <wbx@openadk.org>2016-04-21 01:25:29 +0200
committerWaldemar Brodkorb <wbx@uclibc-ng.org>2016-06-30 03:24:42 +0200
commitee92c0fe5c1b9d59508273916e2c9a75b68dbc13 (patch)
tree65a22258b12f84325910fc2ad47e2b02696ef593 /libc/sysdeps/linux/nds32/sysdep.S
parentdd46699e46decb7273f44dc2cbf307f096dc39e8 (diff)
nds32: add support for new architecture
Add support for Andes Technology NDS32 architecture. See here http://www.andestech.com/en/index/index.htm for more informaton. Verification of the port from an older uClibc port was done on a sponsored AG101p board. The testsuite only has 5 errors, three are related to an existing bug in dlclose() with LT.old, also happening on cris32 and m68k. Failures to fallocate/posix_fallocate are unresolved. Thanks to Andes Technology sponsoring the hardware and being very helpful while doing the uClibc-ng porting. Signed-off-by: Waldemar Brodkorb <wbx@uclibc-ng.org>
Diffstat (limited to 'libc/sysdeps/linux/nds32/sysdep.S')
-rw-r--r--libc/sysdeps/linux/nds32/sysdep.S125
1 files changed, 125 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/nds32/sysdep.S b/libc/sysdeps/linux/nds32/sysdep.S
new file mode 100644
index 000000000..4e86a26e0
--- /dev/null
+++ b/libc/sysdeps/linux/nds32/sysdep.S
@@ -0,0 +1,125 @@
+/*
+ * Copyright (C) 2016 Andes Technology, Inc.
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+/* Copyright (C) 1991-2003 Free Software Foundation, Inc.
+
+ 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.
+
+ 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <sysdep.h>
+#define _ERRNO_H
+#include <bits/errno.h>
+
+.text
+
+.globl C_SYMBOL_NAME(errno)
+.globl __syscall_error
+
+ENTRY (__syscall_error)
+#ifdef OLD_ABI
+ subri $r5, $r5, #0
+#else
+ subri $r0, $r0, #0
+#endif
+
+#define __syscall_error __syscall_error_1
+
+#undef syscall_error
+#ifdef NO_UNDERSCORES
+__syscall_error:
+#else
+syscall_error:
+#endif
+
+#ifdef PIC
+ /* set GP register */
+ pushm $gp, $lp
+#ifdef __NDS32_N1213_43U1H__
+ jal 2f
+ sethi $gp, hi20(_GLOBAL_OFFSET_TABLE_)
+ ori $gp, $gp, lo12(_GLOBAL_OFFSET_TABLE_+4)
+ add $gp, $gp, $lp
+#else
+ mfusr $r15, $PC
+ sethi $gp, hi20(_GLOBAL_OFFSET_TABLE_+4)
+ ori $gp, $gp, lo12(_GLOBAL_OFFSET_TABLE_+8)
+ add $gp, $gp, $r15
+#endif
+#endif
+
+#if defined (EWOULDBLOCK_sys) && EWOULDBLOCK_sys != EAGAIN
+ /* We translate the system's EWOULDBLOCK error into EAGAIN.
+ The GNU C library always defines EWOULDBLOCK==EAGAIN.
+ EWOULDBLOCK_sys is the original number. */
+ push $t0
+ li $t0, EWOULDBLOCK_sys
+ bne $r0, $t0, 1f
+ pop $t0
+ li $r0, EAGAIN
+1:
+#endif
+
+#ifdef _LIBC_REENTRANT
+ push $lp
+ push $r0
+#if defined(NDS32_ABI_2) || defined(NDS32_ABI_2FP)
+#else
+ addi $sp, $sp, -24
+#endif
+
+#ifdef PIC
+ bal C_SYMBOL_NAME(__errno_location@PLT)
+#else
+ bal C_SYMBOL_NAME(__errno_location)
+#endif
+#if defined(NDS32_ABI_2) || defined(NDS32_ABI_2FP)
+#else
+ addi $sp, $sp, 24
+#endif
+ pop $r1
+
+ swi $r1, [$r0]
+ li $r0, -1
+ pop $lp
+#ifdef PIC
+ /* restore GP register */
+ popm $gp, $lp
+#endif
+2:
+ ret
+#else
+#ifndef PIC
+ l.w $r1, .L1
+ swi $r0, [$r1]
+ li $r0, -1
+ ret
+
+.L1: .long C_SYMBOL_NAME(errno)
+#else
+ s.w $r0, errno@GOTOFF
+ li $r0, -1
+
+ /* restore GP register */
+ popm $gp, $lp
+2:
+ ret
+
+#endif
+#endif
+
+#undef __syscall_error
+END (__syscall_error)