diff options
author | Waldemar Brodkorb <wbx@openadk.org> | 2016-04-21 01:25:29 +0200 |
---|---|---|
committer | Waldemar Brodkorb <wbx@uclibc-ng.org> | 2016-06-30 03:24:42 +0200 |
commit | ee92c0fe5c1b9d59508273916e2c9a75b68dbc13 (patch) | |
tree | 65a22258b12f84325910fc2ad47e2b02696ef593 /libc/sysdeps/linux/nds32/mmap.S | |
parent | dd46699e46decb7273f44dc2cbf307f096dc39e8 (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/mmap.S')
-rw-r--r-- | libc/sysdeps/linux/nds32/mmap.S | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/nds32/mmap.S b/libc/sysdeps/linux/nds32/mmap.S new file mode 100644 index 000000000..351d1c502 --- /dev/null +++ b/libc/sysdeps/linux/nds32/mmap.S @@ -0,0 +1,101 @@ +/* + * Copyright (C) 2016 Andes Technology, Inc. + * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball. + */ + +/* Copyright (C) 1998, 2000, 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 <sys/syscall.h> +#include <sysdep.h> + .text + +.globl __mmap +ENTRY (__mmap) + +#ifdef PIC +.pic +#endif + + // reserve space for r0, r1 +#if defined(NDS32_ABI_2) || defined(NDS32_ABI_2FP) +#else + addi $sp, $sp, -8 +#endif + // change to units of the system page size + srli $r5, $r5, 0xc + + syscall SYS_ify(mmap2) +#if defined(NDS32_ABI_2) || defined(NDS32_ABI_2FP) +#else + addi $sp, $sp, 8 +#endif + + /* r0 is < -4096 if there was an error. */ + bgez $r0, 1f + sltsi $r1,$r0,-4096 + beqz $r1,2f + +1: + ret +2: +#ifdef PIC +#ifdef __NDS32_N1213_43U1H__ + ! save lp + addi $r2, $lp, 0 + + ! set r1 as gp + jal 1b + sethi $r1, hi20(_GLOBAL_OFFSET_TABLE_) + ori $r1, $r1, lo12(_GLOBAL_OFFSET_TABLE_+4) + add $r1, $lp, $r1 + + ! restore lp + addi $lp, $r2, 0 + + ! r15=SYSCALL_ERROR@PLT + sethi $r15, hi20(SYSCALL_ERROR@PLT) + ori $r15, $r15, lo12(SYSCALL_ERROR@PLT) + add $r15, $r15, $r1 + + ! jump to SYSCALL_ERROR + jr $r15 +#else + ! set r1 as gp + mfusr $r15, $PC + sethi $r1, hi20(_GLOBAL_OFFSET_TABLE_+4) + ori $r1, $r1, lo12(_GLOBAL_OFFSET_TABLE_+8) + add $r1, $r1, $r15 + + ! r15=SYSCALL_ERROR@PLT + sethi $r15, hi20(SYSCALL_ERROR@PLT) + ori $r15, $r15, lo12(SYSCALL_ERROR@PLT) + add $r15, $r15, $r1 + + ! jump to SYSCALL_ERROR + jr $r15 +#endif +#else + j SYSCALL_ERROR +#endif + +ret + +PSEUDO_END (__mmap) + +weak_alias (__mmap, mmap) +libc_hidden_def(mmap) |