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2014-03-21 Sabrini Ni <sabrinanitw@gmail.com>

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* nds32/Makefile.in: Alter filename.
        * nds32/syscall_argv.S: Rename to _argv.S
        * nds32/syscall_argvlen.S: Rename to _argvlen.S
        * nds32/syscall_chdir.S: Rename to _chdir.S
        * nds32/syscall_chmod.S: Rename to _chmod.S
        * nds32/syscall_close.S: Rename to _close.S
        * nds32/syscall_exit.S: Rename to _exit.S
        * nds32/syscall_fstat.S: Rename to _fstat.S
        * nds32/syscall_getpid.S: Rename to _getpid.S
        * nds32/syscall_gettimeofday.S: Rename to _gettimeofday.S
        * nds32/syscall_isatty.S: Rename to _isatty.S
        * nds32/syscall_kill.S: Rename to _kill.S
        * nds32/syscall_link.S: Rename to _link.S
        * nds32/syscall_lseek.S: Rename to _lseek.S
        * nds32/syscall_open.S: Rename to _open.S
        * nds32/syscall_read.S: Rename to _read.S
        * nds32/syscall_rename.S: Rename to _rename.S
        * nds32/syscall_sbrk.S: Rename to _sbrk.S
        * nds32/syscall_stat.S: Rename to _stat.S
        * nds32/syscall_system.S: Rename to _system.S
        * nds32/syscall_time.S: Rename to _time.S
        * nds32/syscall_times.S: Rename to _times.S
        * nds32/syscall_unlink.S: Rename to _unlink.S
        * nds32/syscall_utime.S: Rename to _utime.S
        * nds32/syscall_write.S: Rename to _write.S
This commit is contained in:
Jeff Johnston
2014-03-21 20:55:57 +00:00
parent 8194dcec36
commit 31b1f3e55f
26 changed files with 60 additions and 30 deletions
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78
libgloss/nds32/_sbrk.S Normal file
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@@ -0,0 +1,78 @@
/*
Copyright (c) 2013 Andes Technology Corporation.
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
The name of the company may not be used to endorse or promote
products derived from this software without specific prior written
permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL RED HAT INCORPORATED BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "../syscall.h"
#include "syscall_extra.h"
.extern _impure_ptr /* The first element is _errno. */
.extern _end
.global _sbrk
.text
.align 2
_sbrk:
/* Get the value stored in heap_end (Top of Heap). If the value is zero,
initialize it with the ending of bss section and leave a 1024-byte
room to do low memory action. */
l.w $r1, heap_end
bnez $r1, .L0
/* Note: leave 1024 byte to do low memory action. */
la $r1, _end + 1024
s.w $r1, heap_end
.L0:
/* Try to increments heap_end by $r0 bytes. Check if collision happens ?
If collision happens, -1 is returned and errno is set to ENOMEM.
Otherwise, save new value to heap_end and return the previous
heap_end. */
/* Make sure new heap_end is aligned on 8-byte boundary. */
addi $r0, $r0, 7
srli $r0, $r0, 3
slli $r0, $r0, 3
add $r0, $r1, $r0 /* Set $r0 as new heap_end. */
slt $r2, $sp, $r0 /* Set $r2 if $sp is lower than heap_end. */
bnez $r2, .Lerror /* Branch if collision happens. */
s.w $r0, heap_end /* Save new value to heap_end. */
move $r0, $r1 /* Return the previous heap_end. */
ret
.Lerror:
movi $r0, 12
l.w $r15, _impure_ptr
swi $r0, [$r15] /* Set errno. */
movi $r0, -1 /* Reture value is -1. */
ret
.section .bss
.align 2
heap_end:
.word 0