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Diffstat (limited to 'libgloss/nds32/syscall_write.S')
| -rw-r--r-- | libgloss/nds32/syscall_write.S | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/libgloss/nds32/syscall_write.S b/libgloss/nds32/syscall_write.S new file mode 100644 index 000000000..0b10f7e5f --- /dev/null +++ b/libgloss/nds32/syscall_write.S @@ -0,0 +1,53 @@ +/* +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 errno + + .section .text + .global _write + .type _write, @function + .align 2 +_write: + /* Make syscall 'SYS_write'. + Reture value '-1' stored in $r0 means there is something wrong. + If there is something wrong, make syscall 'SYS_geterr' to get + error code to see what exactly happens and store it in errno . */ + syscall SYS_write + addi $r1, $r0, 1 + bnez $r1, .Ldone + syscall SYS_geterr + s.w $r0, errno + movi $r0, -1 +.Ldone: + ret + .size _write, .-_write |