87 lines
1.7 KiB
ArmAsm
87 lines
1.7 KiB
ArmAsm
#
|
|
! $Source: /cvsroot/tack/Ack/plat/linux386/boot.s,v $
|
|
! $State: Exp $
|
|
! $Revision: 1.3 $
|
|
|
|
! Declare segments (the order is important).
|
|
|
|
.sect .text
|
|
.sect .rom
|
|
.sect .data
|
|
.sect .bss
|
|
|
|
.sect .text
|
|
|
|
begtext:
|
|
! This code is placed at the beginning of the ELF executable and is the
|
|
! first thing that runs.
|
|
!
|
|
! On entry, the stack looks like this:
|
|
!
|
|
! sp+.. NULL
|
|
! sp+8+(4*argc) env (X quads)
|
|
! sp+4+(4*argc) NULL
|
|
! sp+4 argv (argc quads)
|
|
! sp argc
|
|
!
|
|
! The ACK actually expects:
|
|
!
|
|
! sp+8 argc
|
|
! sp+4 argv
|
|
! sp env
|
|
|
|
move.l (0, sp), d0 ! d0 = argc
|
|
move.l (4, sp), d1 ! d1 = argv
|
|
move.l d0, d2
|
|
asl.l #2, d2
|
|
move.l (sp, d2), d2
|
|
add.l #12, d2 ! d2 = environ
|
|
|
|
move.l d2, -(sp) ! environ
|
|
move.l d0, -(sp) ! argc
|
|
move.l d1, -(sp) ! argv
|
|
pea (0) ! dummy, representing the return address
|
|
|
|
jmp (__m_a_i_n)
|
|
|
|
#if 0
|
|
mov eax, (esp) ! eax = argc
|
|
lea ebx, 4(esp) ! ebx = argv
|
|
lea ecx, (esp)(eax*4)
|
|
add ecx, 12 ! environ
|
|
|
|
push ecx ! environ
|
|
push ebx ! argc
|
|
push eax ! argv
|
|
push eax ! dummy, representing the return argument
|
|
xor ebp, ebp
|
|
#endif
|
|
|
|
! This provides an emergency exit routine used by EM.
|
|
|
|
.define EXIT
|
|
.extern EXIT
|
|
EXIT:
|
|
pea (1)
|
|
jmp (__exit)
|
|
|
|
! This is used by the trap routine for diagnostics.
|
|
|
|
.define WRITE
|
|
.extern WRITE
|
|
WRITE:
|
|
jmp (_write)
|
|
|
|
! Define symbols at the beginning of our various segments, so that we can find
|
|
! them. (Except .text, which has already been done.)
|
|
|
|
.sect .data; begdata:
|
|
.sect .rom; begrom:
|
|
.sect .bss; begbss:
|
|
|
|
! Some magic data. All EM systems need these.
|
|
|
|
.define .trppc, .ignmask, _errno
|
|
.comm .trppc, 4
|
|
.comm .ignmask, 4
|
|
.comm _errno, 4
|