musl/crt/crt1.c
Rich Felker 54b7564b72 remove unnecessary and problematic _Noreturn from crt/ldso startup
after commit a48ccc159a removed the use
of _Noreturn on the stage3_func type (which only worked due to it
being defined to the "GNU C" attribute in C99 mode), GCC could no
longer assume that the ends of __dls2 and __dls2b are unreachable, and
produced a warning that a function marked _Noreturn returns.

also, since commit 4390383b32, the
_Noreturn declaration for __libc_start_main in crt1/rcrt1 has been not
only inconsistent with the definition, but wrong. formally,
__libc_start_main does return, via a (hopefully) tail call to a helper
function after the barrier. incorrect usage of _Noreturn in the
declaration was probably formal UB.

the _Noreturn specifiers were not useful in any of these places, so
remove them all. now, the only remaining usage of _Noreturn is in
public interfaces where _Noreturn is part of their contract.
2019-06-25 19:05:40 -04:00

20 lines
352 B
C

#include <features.h>
#include "libc.h"
#define START "_start"
#include "crt_arch.h"
int main();
weak void _init();
weak void _fini();
int __libc_start_main(int (*)(), int, char **,
void (*)(), void(*)(), void(*)());
void _start_c(long *p)
{
int argc = p[0];
char **argv = (void *)(p+1);
__libc_start_main(main, argc, argv, _init, _fini, 0);
}