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Diffstat (limited to 'libgloss/nds32/_sbrk.S')
| -rw-r--r-- | libgloss/nds32/_sbrk.S | 80 |
1 files changed, 0 insertions, 80 deletions
diff --git a/libgloss/nds32/_sbrk.S b/libgloss/nds32/_sbrk.S deleted file mode 100644 index dc3ed7bf8..000000000 --- a/libgloss/nds32/_sbrk.S +++ /dev/null @@ -1,80 +0,0 @@ -/* -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 - .type _sbrk, @function - - .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 - - .size _sbrk, .-_sbrk - .section .bss - .align 2 -heap_end: - .word 0 |