.global _start

_start:

# copy reent to this page
push %ebx
push %ecx

mov _impure_ptr,%eax
mov $0xf5000000,%ebx
copy: 
mov (%eax),%ecx
mov %ecx,(%ebx)
add $4, %ebx
add $4, %eax
cmp $0xf5001000,%ebx
jne copy

pop %ecx
pop %ebx

movl $0xf5000000, _impure_ptr

# environment adress was passed on stack

pop %eax                      
mov %eax, environ

# call main (argc and argv are on the stack)
call main

# push exit code and pass to _exit syscall
push %eax
call exit

# this should never be reached!
.wait:
    hlt
jmp .wait