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#include <Kernel/Syscall.h>
#include <errno.h>
#include <getopt.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#if !defined __ENUMERATE_SYSCALL
# define __ENUMERATE_SYSCALL(x) SC_##x,
#endif
#if !defined __ENUMERATE_REMOVED_SYSCALL
# define __ENUMERATE_REMOVED_SYSCALL(x)
#endif
#define SC_NARG 4
Syscall::Function syscall_table[] = {
ENUMERATE_SYSCALLS
};
uintptr_t arg[SC_NARG];
char buf[BUFSIZ];
uintptr_t parse(char* s);
int main(int argc, char** argv)
{
int oflag;
int opt;
while ((opt = getopt(argc, argv, "oh")) != -1) {
switch (opt) {
case 'o':
oflag = 1;
break;
case 'h':
fprintf(stderr, "usage: \tsyscall [-o] entry [args; buf==BUFSIZ buffer]\n");
fprintf(stderr, "\tsyscall write 1 hello 5\n");
fprintf(stderr, "\tsyscall -o read 0 buf 5\n");
fprintf(stderr, "\tsyscall -o getcwd buf 100\n");
break;
default:
exit(EXIT_FAILURE);
}
}
if (optind >= argc) {
fprintf(stderr, "No entry specified\n");
return -1;
}
for (int i = 0; i < argc - optind; i++) {
arg[i] = parse(argv[i + optind]);
}
for (auto sc : syscall_table) {
if (strcmp(Syscall::to_string(sc), (char*)arg[0]) == 0) {
int rc = syscall(sc, arg[1], arg[2], arg[3]);
if (rc == -1) {
perror("syscall");
} else {
if (oflag)
printf("%s", buf);
}
fprintf(stderr, "Syscall return: %d\n", rc);
return 0;
}
}
fprintf(stderr, "Invalid syscall entry %s\n", (char*)arg[0]);
return -1;
}
uintptr_t parse(char* s)
{
char* t;
uintptr_t l;
if (strcmp(s, "buf") == 0) {
return (uintptr_t)buf;
}
l = strtoul(s, &t, 0);
if (t > s && *t == 0) {
return l;
}
return (uintptr_t)s;
}
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