startup.c

#include "tinylib.h"

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

// https://stackoverflow.com/questions/55243572/how-can-i-get-ld-to-put-always-put-the-entry-point-at-the-location-of-ttext
__attribute__((section(".text.startup"))) __attribute__((naked)) void _start(void) {    // XXX
	int r;
	int argc;
	char **argv;
	char **envp;
	asm volatile (
		"mov rdi, [rsp]\n\t"
		"lea rsi, [rsp+8]\n\t"
		"lea rdx, [rsp+rdi*8+16]\n\t"
		:"=D"(argc),"=S"(argv),"=d"(envp)
		:
		:"memory"
	);
	r = main(argc, argv, envp);
	exit(r);
	asm volatile ("hlt");
}