//
// File: src/test/ia32-crt0.S
//
// Description: Simple startupcode
//
.text
.global _start
_start:
/* dont' load the stack pointer for our small stack any more! */
/* save environment given from elfexec. the third param is at -8 because
there is no return address on the stack. */
mov 8(%esp), %ebx
mov %ebx, environ
/* initialize libc */
call __libc_init
/* Start the constructors of global objects (supporting C++) */
leal __section_ctors_start, %ebx
2:
cmp $__section_ctors_end, %ebx
je 3f
call *(%ebx)
add $4,%ebx
jmp 2b
3:
/* push a return address to catch main ending (should never happen) */
pushl $___return_from_main
jmp main /* call main() */
___return_from_main:
pushl %eax /* save return code as a parameter to exit */
/* run the destructors of global objects (supporting C++) */
leal __section_dtors_start, %ebx
5:
cmp $__section_dtors_end, %ebx
je 6f
call *(%ebx)
add $4,%ebx
jmp 5b
6:
/* Kill ourself */
call exit
/* Enter kdebug (this is what never should happen)
WARNING: only L4Ka::Pistachio KDebug enter */
int $3
jmp 8f
mov $7f, %eax
.section .rodata
7: .asciz "***System stopped***"
.previous
8: jmp 6b /* Loop forever on the enter_kdebug */
.data
/* save envp pointer to environment here */
.global environ
environ:
.long 0
/* symbols which are expected to exist */
.global __heap_start_ptr
__heap_start_ptr:
.long __elf_end
