98 lines
2.0 KiB
C
98 lines
2.0 KiB
C
/*
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* SPDX-FileCopyrightText: 2023 Andrius Štikonas <andrius@stikonas.eu>
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*
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* SPDX-License-Identifier: GPL-3.0-or-later
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*/
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void *syscall_table;
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void *_brk;
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int sys_read(int fd, char* buf, unsigned count, void, void, void)
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{
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return read(fd, buf, count);
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}
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int sys_write(int fd, char* buf, unsigned count, void, void, void)
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{
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return write(fd, buf, count);
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}
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int sys_open(char* name, int flag, int mode, void, void, void)
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{
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return open(name, flag, mode);
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}
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int sys_close(int fd, void, void, void, void, void)
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{
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return close(fd);
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}
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int sys_lseek(int fd, int offset, int whence, void, void, void)
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{
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return lseek(fd, offset, whence);
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}
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int sys_access(char* pathname, int mode, void, void, void, void)
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{
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return access(pathname, mode);
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}
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int sys_brk(void* addr, void, void, void, void, void)
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{
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if (_brk == NULL) {
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_brk = calloc(1, 128 * 1024 * 1024);
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if (_brk == NULL) {
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return addr;
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}
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}
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if (addr == NULL) {
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return _brk;
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}
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else {
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_brk = addr;
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return _brk;
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}
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}
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void sys_exit(unsigned value, void, void, void, void, void)
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{
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exit(value);
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}
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int sys_getcwd(char* buf, int size, void, void, void, void)
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{
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return getcwd(buf, size);
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}
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int sys_chdir(char* path, void, void, void, void, void)
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{
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return chdir(path);
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}
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int sys_mkdir(char const* a, mode_t b, void, void, void, void)
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{
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return mkdir(a, b);
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}
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int sys_unlink(char* filename, void, void, void, void, void)
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{
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return unlink(filename);
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}
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void init_syscalls()
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{
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syscall_table = calloc(256, sizeof(void*));
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syscall_table[0] = sys_read;
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syscall_table[1] = sys_write;
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syscall_table[2] = sys_open;
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syscall_table[3] = sys_close;
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syscall_table[8] = sys_lseek;
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syscall_table[12] = sys_brk;
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syscall_table[21] = sys_access;
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syscall_table[60] = sys_exit;
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syscall_table[79] = sys_getcwd;
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syscall_table[80] = sys_chdir;
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syscall_table[83] = sys_mkdir;
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syscall_table[87] = sys_unlink;
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}
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