61 lines
1.9 KiB
C
61 lines
1.9 KiB
C
/* -*-comment-start: "//";comment-end:""-*-
|
|
* GNU Mes --- Maxwell Equations of Software
|
|
* Copyright © 2016,2017,2019,2020 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
|
|
* Copyright © 2019,2020 Danny Milosavljevic <dannym@scratchpost.org>
|
|
*
|
|
* This file is part of GNU Mes.
|
|
*
|
|
* GNU Mes is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 3 of the License, or (at
|
|
* your option) any later version.
|
|
*
|
|
* GNU Mes 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with GNU Mes. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "mes/lib-mini.h"
|
|
|
|
// *INDENT-OFF*
|
|
#if !__TINYC__
|
|
#define SYS_write "64"
|
|
ssize_t
|
|
_write (int filedes, void const *buffer, size_t size)
|
|
{
|
|
long r;
|
|
asm (
|
|
"mov x7, #"SYS_write"\n\t"
|
|
"mov x0, %1\n\t"
|
|
"mov x1, %2\n\t"
|
|
"mov x2, %3\n\t"
|
|
"svc #0\n\t"
|
|
"mov %0, x0\n\t"
|
|
: "=r" (r)
|
|
: "r" (filedes), "r" (buffer), "r" (size)
|
|
: "r0", "r1", "r2", "r7"
|
|
);
|
|
return r;
|
|
}
|
|
#else //__TINYC__
|
|
#define SYS_write 0x04
|
|
ssize_t
|
|
_write (int filedes, void const *buffer, size_t size)
|
|
{
|
|
long r;
|
|
int c = SYS_write;
|
|
__asm__ (".int 0xe51b7008\n"); //ldr r7, [fp, #-8] ; <c>
|
|
__asm__ (".int 0xe59b000c\n"); //ldr r0, [fp, #12] ; filedes
|
|
__asm__ (".int 0xe59b1010\n"); //ldr r1, [fp, #16] ; buffer
|
|
__asm__ (".int 0xe59b2014\n"); //ldr r2, [fp, #20] ; size
|
|
__asm__ (".int 0xef000000\n"); //svc 0x00000000
|
|
__asm__ (".int 0xe50b0004\n"); //str r0, [fp, #-4]
|
|
return r;
|
|
}
|
|
#endif //__TINYC__
|
|
// *INDENT-ON*
|