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Add ARM C runtime library. 

* lib/linux/arm-mes/crt1.c: New file.
* lib/linux/arm-mes/mes.c: New file.
* lib/linux/arm-mes/mini.c: New file.
* lib/linux/libc-mini.c: Use them.
This commit is contained in:
Danny Milosavljevic 2019-02-13 16:51:54 +01:00 committed by Jan Nieuwenhuizen
parent 394db05c9b
commit 3aaf8774a8
No known key found for this signature in database
GPG Key ID: F3C1A0D9C1D65273
3 changed files with 244 additions and 0 deletions
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70
lib/linux/arm-mes-mescc/crt1.c Normal file
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/* -*-comment-start: "//";comment-end:""-*-
* GNU Mes --- Maxwell Equations of Software
* Copyright © 2017,2018 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 "mes/lib-mini.h"
int main (int argc, char *argv[], char *envp[]);
void /* must not return */
_start ()
{
/*
sp+1 argv
sp -> argc
environ = &argv[argc + 1]
*/
/* stdin = 0 */
asm ("!0 mov____$i8,%r0");
asm ("mov____%r0,0x32 &__stdin");
/* stdout = 1 */
asm ("!1 mov____$i8,%r0");
asm ("mov____%r0,0x32 &__stdout");
/* stderr = 2 */
asm ("!2 mov____$i8,%r0");
asm ("mov____%r0,0x32 &__stderr");
/* Add "environ" to main's arguments */
asm ("!0 ldr____%r0,(%sp,#$i8)"); /* "argc" */
asm ("!4 ldr____%r1,(%sp,#$i8)"); /* "argv" */
asm ("add____%r2,%r0,%r1,lsl#4"); /* "environ": argv + argc */
asm ("!4 add____%r2,$i8"); /* "environ": argv + argc + 1 */
asm ("push___%r2");
asm ("push___%r1");
asm ("push___%r0");
main ();
//asm ("mov____%r0,%r0");
asm ("SYS_exit mov____$i8,%r7");
asm ("swi____$0");
asm ("hlt");
}

37
lib/linux/arm-mes-mescc/mini.c Normal file
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/* -*-comment-start: "//";comment-end:""-*-
* GNU Mes --- Maxwell Equations of Software
* Copyright © 2016,2017 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/>.
*/
void
_exit ()
{
asm ("SYS_exit mov____$i8,%r7");
asm ("!8 mov____0x8(%ebp),%r0");
asm ("swi____$0");
}
void
_write ()
{
asm ("SYS_write mov____$i8,%r7");
asm ("!8 mov____0x8(%ebp),%r0");
asm ("!12 mov____0x8(%ebp),%r1");
asm ("!16 mov____0x8(%ebp),%r2");
asm ("swi____$0");
}

137
lib/linux/arm-mes-mescc/syscall.c Normal file
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/* -*-comment-start: "//";comment-end:""-*-
* GNU Mes --- Maxwell Equations of Software
* Copyright © 2016,2017,2018 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 <errno.h>
#include <linux/x86/syscall.h>
int
__sys_call (int sys_call)
{
asm ("!8 mov____0x8(%ebp),%r7");
asm ("swi____$0");
}
int
__sys_call1 (int sys_call, int one)
{
asm ("!8 mov____0x8(%ebp),%r7");
asm ("!12 mov____0x8(%ebp),%r0");
asm ("swi____$0");
}
int
__sys_call2 (int sys_call, int one, int two)
{
asm ("!8 mov____0x8(%ebp),%r7");
asm ("!12 mov____0x8(%ebp),%r0");
asm ("!16 mov____0x8(%ebp),%r1");
asm ("swi____$0");
}
int
__sys_call3 (int sys_call, int one, int two, int three)
{
asm ("!8 mov____0x8(%ebp),%r7");
asm ("!12 mov____0x8(%ebp),%r0");
asm ("!16 mov____0x8(%ebp),%r1");
asm ("!20 mov____0x8(%ebp),%r2");
asm ("swi____$0");
}
int
__sys_call4 (int sys_call, int one, int two, int three, int four)
{
asm ("!8 mov____0x8(%ebp),%r7");
asm ("!12 mov____0x8(%ebp),%r0");
asm ("!16 mov____0x8(%ebp),%r1");
asm ("!20 mov____0x8(%ebp),%r2");
asm ("!24 mov____0x8(%ebp),%r3");
asm ("swi____$0");
}
int
_sys_call (int sys_call)
{
int r = __sys_call (sys_call);
if (r < 0)
{
errno = -r;
r = -1;
}
else
errno = 0;
return r;
}
int
_sys_call1 (int sys_call, int one)
{
int r = __sys_call1 (sys_call, one);
if (r < 0)
{
errno = -r;
r = -1;
}
else
errno = 0;
return r;
}
int
_sys_call2 (int sys_call, int one, int two)
{
int r = __sys_call2 (sys_call, one, two);
if (r < 0)
{
errno = -r;
r = -1;
}
else
errno = 0;
return r;
}
int
_sys_call3 (int sys_call, int one, int two, int three)
{
int r = __sys_call3 (sys_call, one, two, three);
if (r < 0)
{
errno = -r;
r = -1;
}
else
errno = 0;
return r;
}
int
_sys_call4 (int sys_call, int one, int two, int three, int four)
{
int r = __sys_call4 (sys_call, one, two, three, four);
if (r < 0)
{
errno = -r;
r = -1;
}
else
errno = 0;
return r;
}