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/* -*-comment-start: "//";comment-end:""-*-
* GNU Mes --- Maxwell Equations of Software
* Copyright © 2016,2017,2018,2019 Jan (janneke) Nieuwenhuizen <janneke@gnu.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 <linux/x86/syscall.h>
// *INDENT-OFF*
static long
__sys_call_internal (long sys_call)
{
long r;
asm (
"mov r7, %1\n\t"
"swi $0\n\t"
"mov %0, r0\n\t"
: "=r" (r)
: "r" (sys_call)
: "r0", "r7"
);
return r;
}
static long
__sys_call2_internal (long sys_call, long one, long two)
{
long r;
asm (
"mov r7, %1\n\t"
"mov r0, %2\n\t"
"mov r1, %3\n\t"
"swi $0\n\t"
"mov %0, r0\n\t"
: "=r" (r)
: "r" (sys_call), "r" (one), "r" (two)
: "r0", "r1", "r7"
);
return r;
}
// *INDENT-ON*
/* Returns < 0 on error (errno-like value from kernel), or 0 on success */
int
__raise (int signum)
{
long pid = __sys_call_internal (SYS_getpid);
if (pid < 0)
return pid;
else
return __sys_call2_internal (SYS_kill, pid, signum);
}
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