lib/libc/internal/init/init.c


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#include <libc.h>
#include <stddef.h>
#include <stdint.h>
#include <stdlib.h>
#include <sys/cdefs.h>

extern void __init_vdso(void);
extern void __init_tls(void);

extern int main(int, char **, char **);

struct libc __libc = { 0 };
char **environ;
char *__progname;

__used void __init(uintptr_t *rsp)
{
	char **argv;
	size_t *auxv;
	int argc;

	argc = (int)(*rsp);
	argv = (char **)(++rsp);

	rsp += argc;

	environ = (char **)(++rsp);
	__progname = argv[0];

	while (*rsp)
		rsp++;

	auxv = (size_t *)++rsp;

	for (size_t i = 0; auxv[i]; i += 2)
		__libc.auxv[auxv[i]] = auxv[i + 1];

	__init_tls();
	__init_vdso();

	exit(main(argc, argv, environ));
}