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84 lines
2 KiB
ArmAsm
84 lines
2 KiB
ArmAsm
/*
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* FreeLoader
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* Copyright (C) 1998-2002 Brian Palmer <brianp@sginet.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <asm.inc>
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#include <arch/pc/x86common.h>
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#include <arch/pc/pcbios.h>
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.code32
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EXTERN SwitchToReal:PROC
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EXTERN ContinueAddress:DWORD
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Int386_regsin:
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.long 0
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Int386_regsout:
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.long 0
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/*
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* int Int386(int ivec, REGS* in, REGS* out);
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*/
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PUBLIC _Int386
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_Int386:
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/* Get the function parameters */
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mov eax, dword ptr [esp + 4]
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mov dword ptr ds:[BSS_IntVector], eax
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mov eax, dword ptr [esp + 8]
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mov dword ptr [Int386_regsin], eax
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mov eax, dword ptr [esp + 12]
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mov dword ptr [Int386_regsout], eax
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/* Save all registers + segment registers */
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push ds
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push es
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push fs
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push gs
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pusha
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/* Copy input registers */
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mov esi, dword ptr [Int386_regsin]
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mov edi, BSS_RegisterSet
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mov ecx, REGS_SIZE / 4
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rep movsd
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/* Set the function ID */
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mov bx, FNID_Int386
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/* Set continue address and switch to real mode */
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mov dword ptr [ContinueAddress], offset Int386_return
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jmp SwitchToReal
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Int386_return:
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/* Copy output registers */
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mov esi, BSS_RegisterSet
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mov edi, dword ptr [Int386_regsout]
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mov ecx, REGS_SIZE / 4
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rep movsd
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popa
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pop gs
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pop fs
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pop es
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pop ds
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ret
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END
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