#include <stdint.h>
#include <stddef.h>
#include <system/system.h>
#include <sysdefs/processctl.h>
#include <errors.h>
#include <dlmalloc/malloc.h>
#include <uprintf.h>
#include <log.h>

extern void main(void);

void clearbss(void) {
  extern uint8_t _bss_start;
  extern uint8_t _bss_end;

  uint8_t *ps = &_bss_start;
  uint8_t *pe = &_bss_end;
  size_t sz = pe - ps;
  for (size_t i = 0; i < sz; i++) {
    ps[i] = 0;
  }
}

char **_args;
size_t _argslen;

char **args(void) {
  return (char **)_args;
}

size_t argslen(void) {
  return _argslen;
}

// ulib initialization goes here
void _premain(void) {
  clearbss();

  _argslen = processctl(-1, PCTL_ARGLEN, 0, 0, 0);
  _args = dlmalloc(_argslen * sizeof(*_args));
  if (_args == NULL) {
    return;
  }
  for (size_t i = 0; i < _argslen; i++) {
    _args[i] = dlmalloc(PROC_ARG_MAX);
    if (_args[i] == NULL) {
      return;
    }
  }

  processctl(-1, PCTL_ARGV, (uint64_t)_args, _argslen, 0);

  main();
}