diff options
Diffstat (limited to 'interface')
| -rw-r--r-- | interface/crt0.s | 40 |
1 files changed, 20 insertions, 20 deletions
diff --git a/interface/crt0.s b/interface/crt0.s index 914a99d..88e316e 100644 --- a/interface/crt0.s +++ b/interface/crt0.s @@ -1,6 +1,6 @@ .global _start -_start: +_start: // in the beginning... //push %ebx // do we need to persist them??? //push %ecx @@ -19,11 +19,10 @@ _start: //skipzero: -// move impure pointer to our special page (check if not htere already!) - +/////////////////////////////////////////////////////////////////////// +// move impure pointer to our special page (todo: check if not htere already!) mov _impure_ptr,%eax mov $0xf5000000,%ebx - copy: mov (%eax),%ecx mov %ecx,(%ebx) @@ -31,16 +30,16 @@ add $4, %ebx add $4, %eax cmp $0xf5001000,%ebx jne copy - movl $0xf5000000, _impure_ptr +//////////////////////////////////////////////////////////////////////// -call _init // constructors +call _init // constructors from .ctors -// constructors from array_init +/////////////////////////////////////////////////////////////////////// +// constructors from array_init //////////////////////////// mov $__init_array_start,%eax nextctor: - //cmp (__init_array_end),%eax cmp $__init_array_end,%eax je finctor @@ -52,40 +51,41 @@ pop %eax add $4, %eax jmp nextctor -finctor: +finctor: // ready with global ctors +//////////////////////////////////////////////////////////////////////// //pop %ecx //pop %ebx +############################################### # environment adress was passed on stack - pop %eax mov %eax, environ +############################################### -pop %ecx -pop %ebx +pop %ecx //argc +pop %ebx //& argv -and $-16,%esp +and $-16,%esp //align stack sub $8,%esp -push %ebx -push %ecx +push %ebx //argv +push %ecx //& argc -# call main (argc and argv are on the stack) +# call main (argc and argv are on the (realigned) tack) call main -// ALIGN stack +// ALIGN stack again (todo: do we need this!??!!) and $-16,%esp sub $4,%esp push %eax - -call _fini //desctructors +call _fini //desctructors from .dtors // pop programmm return value pop %eax -// ALIGN stack +// ALIGN stack (???) and $-16,%esp sub $4,%esp |