88 lines
1.7 KiB
ArmAsm
88 lines
1.7 KiB
ArmAsm
#
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! $Source: /cvsroot/tack/Ack/plat/linux386/boot.s,v $
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! $State: Exp $
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! $Revision: 1.3 $
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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 ptr to argv
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! sp ptr to env
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li32 r3, __openfirmware_ptr
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stw r5, 0(r3)
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li32 r3, envp
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stwu r3, -4(sp)
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li32 r3, argv
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stwu r3, -4(sp)
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li32 r3, 1 ! argc
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stwu r3, -4(sp)
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bl _openfirmware_init
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bl __m_a_i_n
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! falls through
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.define __exit
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.extern __exit
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.define EXIT
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.extern EXIT
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__exit:
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EXIT:
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b EXIT
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.define _openfirmware_call
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.extern _openfirmware_call
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_openfirmware_call:
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lwz r3, 0(sp)
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li32 r4, __openfirmware_ptr
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lwz r4, 0(r4)
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mtspr ctr, r4
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bcctr 20, 0, 0
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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 _errno
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.comm _errno, 4 ! Posix errno storage
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! The argv and env arrays.
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.sect .rom
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argv: .data4 exename, 0
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envp: .data4 0
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exename: .asciz 'qemuppc.img'
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.define .trppc, .ignmask
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.comm .trppc, 4 ! ptr to user trap handler
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.comm .ignmask, 4 ! user trap ignore mask
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.comm __openfirmware_ptr, 4 ! OpenFirmware entry point
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