mirror of
https://github.com/autc04/Retro68.git
synced 2024-12-02 18:53:22 +00:00
46 lines
1.3 KiB
C
46 lines
1.3 KiB
C
/* libc/sys/linux/crt0.c - Run-time initialization */
|
|
|
|
/* FIXME: This should be rewritten in assembler and
|
|
placed in a subdirectory specific to a platform.
|
|
There should also be calls to run constructors. */
|
|
|
|
/* Written 2000 by Werner Almesberger */
|
|
|
|
|
|
#include <stdlib.h>
|
|
#include <time.h>
|
|
#include <string.h>
|
|
|
|
|
|
extern char **environ;
|
|
|
|
extern int main(int argc,char **argv,char **envp);
|
|
|
|
extern char _end;
|
|
extern char __bss_start;
|
|
|
|
void _start(int args)
|
|
{
|
|
/*
|
|
* The argument block begins above the current stack frame, because we
|
|
* have no return address. The calculation assumes that sizeof(int) ==
|
|
* sizeof(void *). This is okay for i386 user space, but may be invalid in
|
|
* other cases.
|
|
*/
|
|
int *params = &args-1;
|
|
int argc = *params;
|
|
char **argv = (char **) (params+1);
|
|
|
|
environ = argv+argc+1;
|
|
|
|
/* Note: do not clear the .bss section. When running with shared
|
|
* libraries, certain data items such __mb_cur_max or environ
|
|
* may get placed in the .bss, even though they are initialized
|
|
* to non-zero values. Clearing the .bss will end up zeroing
|
|
* out their initial values. The .bss is already initialized
|
|
* by this time by Linux. */
|
|
|
|
tzset(); /* initialize timezone info */
|
|
exit(main(argc,argv,environ));
|
|
}
|