M2-Planet/test/common_aarch64/functions/getcwd.c

48 lines
1.2 KiB
C

/* Copyright (C) 2020 Jeremiah Orians
* Copyright (C) 2020 deesix <deesix@tuta.io>
* This file is part of M2-Planet.
*
* M2-Planet 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.
*
* M2-Planet 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 M2-Planet. If not, see <http://www.gnu.org/licenses/>.
*/
#include<stdlib.h>
//CONSTANT PATH_MAX 4096
#define PATH_MAX 4096
int _getcwd(char* buf, size_t size)
{
asm("SET_X0_FROM_BP" "SUB_X0_16" "DEREF_X0"
"SET_X1_FROM_X0"
"SET_X0_FROM_BP" "SUB_X0_8" "DEREF_X0"
"SET_X8_TO_SYS_GETCWD"
"SYSCALL");
}
char* getcwd(char* buf, size_t size)
{
int c = _getcwd(buf, size);
if(0 == c) return NULL;
return buf;
}
char* getwd(char* buf)
{
return getcwd(buf, PATH_MAX);
}
char* get_current_dir_name()
{
return getcwd(malloc(PATH_MAX), PATH_MAX);
}