d1e3a786aa
* lib/linux-gcc.c (_sys_call, _sys_call1, _sys_call2, _sys_call3): Reset errno. * lib/linux-mes.c (__sys_call, __sys_call1, __sys_call2 , __sys_call3): Rename from _*. (_sys_call, _sys_call1, _sys_call2, _sys_call3): New function. Reset errno.
112 lines
2.3 KiB
C
112 lines
2.3 KiB
C
/* -*-comment-start: "//";comment-end:""-*-
|
|
* Mes --- Maxwell Equations of Software
|
|
* Copyright © 2016,2017,2018 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
|
|
*
|
|
* This file is part of Mes.
|
|
*
|
|
* 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.
|
|
*
|
|
* 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 Mes. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <errno.h>
|
|
|
|
int
|
|
_sys_call (int sys_call)
|
|
{
|
|
#if !__TINYC__
|
|
int r;
|
|
asm (
|
|
"mov %1,%%eax\n\t"
|
|
"int $0x80\n\t"
|
|
"mov %%eax,%0\n\t"
|
|
: "=r" (r)
|
|
: "" (sys_call)
|
|
: "eax"
|
|
);
|
|
if (r < 0)
|
|
errno = -r;
|
|
else
|
|
errno = 0
|
|
return r;
|
|
#endif
|
|
}
|
|
|
|
int
|
|
_sys_call1 (int sys_call, int one)
|
|
{
|
|
#if !__TINYC__
|
|
int r;
|
|
asm (
|
|
"mov %1,%%eax\n\t"
|
|
"mov %2,%%ebx\n\t"
|
|
"int $0x80\n\t"
|
|
"mov %%eax,%0\n\t"
|
|
: "=r" (r)
|
|
: "" (sys_call), "" (one)
|
|
: "eax", "ebx"
|
|
);
|
|
if (r < 0)
|
|
errno = -r;
|
|
else
|
|
errno = 0
|
|
return r;
|
|
#endif
|
|
}
|
|
|
|
int
|
|
_sys_call2 (int sys_call, int one, int two)
|
|
{
|
|
#if !__TINYC__
|
|
int r;
|
|
asm (
|
|
"mov %1,%%eax\n\t"
|
|
"mov %2,%%ebx\n\t"
|
|
"mov %3,%%ecx\n\t"
|
|
"int $0x80\n\t"
|
|
"mov %%eax,%0\n\t"
|
|
: "=r" (r)
|
|
: "" (sys_call), "" (one), "" (two)
|
|
: "eax", "ebx", "ecx"
|
|
);
|
|
if (r < 0)
|
|
errno = -r;
|
|
else
|
|
errno = 0
|
|
return r;
|
|
#endif
|
|
}
|
|
|
|
int
|
|
_sys_call3 (int sys_call, int one, int two, int three)
|
|
{
|
|
#if !__TINYC__
|
|
int r;
|
|
asm (
|
|
"mov %2,%%ebx\n\t"
|
|
"mov %3,%%ecx\n\t"
|
|
"mov %4,%%edx\n\t"
|
|
"mov %1,%%eax\n\t"
|
|
"int $0x80\n\t"
|
|
"mov %%eax,%0\n\t"
|
|
: "=r" (r)
|
|
: "" (sys_call), "" (one), "" (two), "" (three)
|
|
: "eax", "ebx", "ecx", "edx"
|
|
);
|
|
if (r < 0)
|
|
errno = -r;
|
|
else
|
|
errno = 0
|
|
return r;
|
|
#endif
|
|
}
|