mirror of
https://github.com/reactos/reactos.git
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6da6a5ce56
Start my work on modularizing registration of "32-bit" interrupts, i.e. interrupts that are implemented in 32-bit mode, but are stubbed with 16-bit code (so that 16-bit apps can call them). The 16-bit stub code uses a BOP call to our Control BOP function (BOP 0xFF) which can handle in theory many sub-functions (as the BOP 0x58 documented here: http://www.ragestorm.net/tutorial?id=27) specified as an additional BYTE in the call: 0xC4 0xC4 bop_code <optional_bop_subfunction> Here, for calling 32-bit interrupts we use our BOP 0xFF, subfunction 0xFF. The final aim would be to generate the 16-bit stub code when one calls the RegisterInt32 helper function (contrary to what's happening now, that is, the 16-bit stub code is generated for all of the interrupts at BIOS initialization time, and we use it for BIOS and DOS interrupts). svn path=/branches/ntvdm/; revision=60907
685 lines
9.3 KiB
C
685 lines
9.3 KiB
C
/*
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* COPYRIGHT: GPL - See COPYING in the top level directory
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* PROJECT: ReactOS Virtual DOS Machine
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* FILE: bop.c
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* PURPOSE: BIOS Operation Handlers
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* PROGRAMMERS: Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
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* Hermes Belusca-Maito (hermes.belusca@sfr.fr)
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*/
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/* INCLUDES *******************************************************************/
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#define NDEBUG
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#include "emulator.h"
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#include "bop.h"
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#include "bios.h"
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#include "dos.h"
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#include "registers.h"
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LPCWSTR ExceptionName[] =
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{
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L"Division By Zero",
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L"Debug",
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L"Unexpected Error",
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L"Breakpoint",
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L"Integer Overflow",
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L"Bound Range Exceeded",
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L"Invalid Opcode",
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L"FPU Not Available"
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};
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/*
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* This is the list of registered BOP handlers.
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*/
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EMULATOR_BOP_PROC BopProc[EMULATOR_MAX_BOP_NUM] =
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{
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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ControlBop
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};
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/*
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* This is the list of registered 32-bit Interrupt handlers.
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*/
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EMULATOR_INT32_PROC Int32Proc[EMULATOR_MAX_INT_NUM] =
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{
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL
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};
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VOID WINAPI Exception(BYTE ExceptionNumber, LPWORD Stack)
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{
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WORD CodeSegment, InstructionPointer;
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PBYTE Opcode;
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ASSERT(ExceptionNumber < 8);
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/* Get the CS:IP */
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InstructionPointer = Stack[STACK_IP];
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CodeSegment = Stack[STACK_CS];
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Opcode = (PBYTE)SEG_OFF_TO_PTR(CodeSegment, InstructionPointer);
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/* Display a message to the user */
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DisplayMessage(L"Exception: %s occured at %04X:%04X\n"
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L"Opcode: %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X",
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ExceptionName[ExceptionNumber],
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CodeSegment,
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InstructionPointer,
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Opcode[0],
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Opcode[1],
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Opcode[2],
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Opcode[3],
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Opcode[4],
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Opcode[5],
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Opcode[6],
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Opcode[7],
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Opcode[8],
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Opcode[9]);
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/* Stop the VDM */
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VdmRunning = FALSE;
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return;
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}
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// VOID WINAPI IrqDispatch(BYTE IrqNumber, LPWORD Stack)
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// {
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// /* Check if this was an PIC IRQ */
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// if (IntNum >= BIOS_PIC_MASTER_INT && IntNum < BIOS_PIC_MASTER_INT + 8)
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// {
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// /* It was an IRQ from the master PIC */
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// BiosHandleIrq(IntNum - BIOS_PIC_MASTER_INT, Stack);
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// }
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// else if (IntNum >= BIOS_PIC_SLAVE_INT && IntNum < BIOS_PIC_SLAVE_INT + 8)
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// {
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// /* It was an IRQ from the slave PIC */
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// BiosHandleIrq(IntNum - BIOS_PIC_SLAVE_INT + 8, Stack);
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// }
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// return;
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// }
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VOID WINAPI Int32Dispatch(LPWORD Stack)
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{
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BYTE IntNum;
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/* Get the interrupt number */
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IntNum = LOBYTE(Stack[STACK_INT_NUM]);
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/* Check if this was an exception */
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if (IntNum < 8)
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{
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Exception(IntNum, Stack);
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return;
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}
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/* Check if this was an PIC IRQ */
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if (IntNum >= BIOS_PIC_MASTER_INT && IntNum < BIOS_PIC_MASTER_INT + 8)
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{
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/* It was an IRQ from the master PIC */
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BiosHandleIrq(IntNum - BIOS_PIC_MASTER_INT, Stack);
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return;
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}
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else if (IntNum >= BIOS_PIC_SLAVE_INT && IntNum < BIOS_PIC_SLAVE_INT + 8)
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{
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/* It was an IRQ from the slave PIC */
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BiosHandleIrq(IntNum - BIOS_PIC_SLAVE_INT + 8, Stack);
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return;
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}
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/* Call the 32-bit Interrupt handler */
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if (Int32Proc[IntNum] != NULL)
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Int32Proc[IntNum](Stack);
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else
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DPRINT1("Unhandled 32-bit interrupt: 0x%02X\n", IntNum);
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}
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VOID WINAPI ControlBop(LPWORD Stack)
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{
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/* Get the Function Number and skip it */
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BYTE FuncNum = *(PBYTE)SEG_OFF_TO_PTR(getCS(), getIP());
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setIP(getIP() + 1);
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if (FuncNum == CTRL_BOP_INT32)
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Int32Dispatch(Stack);
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else
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DPRINT1("Unassigned Control BOP Function: 0x%02X\n", FuncNum);
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}
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VOID WINAPI RegisterInt32(BYTE IntNumber, EMULATOR_INT32_PROC IntHandler)
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{
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Int32Proc[IntNumber] = IntHandler;
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}
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VOID WINAPI EmulatorBiosOperation(PFAST486_STATE State, UCHAR BopCode)
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{
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WORD StackSegment, StackPointer;
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LPWORD Stack;
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/* Get the SS:SP */
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StackSegment = State->SegmentRegs[FAST486_REG_SS].Selector;
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StackPointer = State->GeneralRegs[FAST486_REG_ESP].LowWord;
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/* Get the stack */
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Stack = (LPWORD)SEG_OFF_TO_PTR(StackSegment, StackPointer);
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/* Call the BOP handler */
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if (BopProc[BopCode] != NULL)
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BopProc[BopCode](Stack);
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else
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DPRINT1("Invalid BOP code: 0x%02X\n", BopCode);
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}
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/* EOF */
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