66 lines
1.3 KiB
ArmAsm
66 lines
1.3 KiB
ArmAsm
#
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! $Source$
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! $State$
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! $Revision$
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! Declare segments (the order is important).
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.sect .text
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.sect .rom
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.sect .data
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.sect .bss
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.sect .text
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begtext:
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! This code is placed at the beginning of the ELF executable and is the
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! first thing that runs.
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!
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! On entry, the stack looks like this:
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!
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! sp+.. NULL
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! sp+8+(4*argc) env (X quads)
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! sp+4+(4*argc) NULL
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! sp+4 argv (argc quads)
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! sp argc
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!
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! The ACK actually expects:
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!
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! sp+8 argc
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! sp+4 argv
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! sp env
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mov eax, (esp) ! eax = argc
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lea ebx, 4(esp) ! ebx = argv
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lea ecx, (esp)(eax*4)
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add ecx, 12 ! environ
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push ecx ! environ
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push ebx ! argc
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push eax ! argv
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push eax ! dummy, representing the return argument
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xor ebp, ebp
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jmp __m_a_i_n
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! This provides an emergency exit routine used by EM.
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.define EXIT
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.extern EXIT
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EXIT:
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push 1
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jmp __exit
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! Define symbols at the beginning of our various segments, so that we can find
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! them. (Except .text, which has already been done.)
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.sect .data; begdata:
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.sect .rom; begrom:
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.sect .bss; begbss:
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! Some magic data. All EM systems need these.
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.define .trppc, .ignmask, _errno
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.comm .trppc, 4
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.comm .ignmask, 4
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.comm _errno, 4
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