Firebee/BaS_gcc
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

add missing files not taken with github import

Browse Source
This commit is contained in:
Markus Fröschle
2017-12-25 10:21:08 +01:00
parent c6de494f33
commit d6a9aa14e3
260 changed files with 75195 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

201
x86emu/x86emu_util.c Normal file
View File

@@ -0,0 +1,201 @@
/* $NetBSD: x86emu_util.c,v 1.1 2007/11/30 20:02:50 joerg Exp $ */
/****************************************************************************
*
* Realmode X86 Emulator Library
*
* Copyright (C) 1996-1999 SciTech Software, Inc.
* Copyright (C) David Mosberger-Tang
* Copyright (C) 1999 Egbert Eich
* Copyright (C) 2007 Joerg Sonnenberger
*
* ========================================================================
*
* Permission to use, copy, modify, distribute, and sell this software and
* its documentation for any purpose is hereby granted without fee,
* provided that the above copyright notice appear in all copies and that
* both that copyright notice and this permission notice appear in
* supporting documentation, and that the name of the authors not be used
* in advertising or publicity pertaining to distribution of the software
* without specific, written prior permission. The authors makes no
* representations about the suitability of this software for any purpose.
* It is provided "as is" without express or implied warranty.
*
* THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*
****************************************************************************/
#include "x86emu.h"
#include "x86emu_regs.h"
// #define DEBUG
#include "debug.h"
static __inline uint16_t le16dec(const void *buf)
{
const uint8_t *p = (uint8_t *) buf;
return ((p[1] << 8) | p[0]);
}
static __inline uint32_t le32dec(const void *buf)
{
const uint8_t *p = (uint8_t *) buf;
return ((p[3] << 24) | (p[2] << 16) | (p[1] << 8) | p[0]);
}
static __inline void le16enc(void *buf, uint16_t u)
{
uint8_t *p = buf;
p[0] = u & 0xff;
p[1] = ((unsigned) u >> 8) & 0xff;
}
static __inline void le32enc(void *buf, uint32_t u)
{
uint8_t *p = buf;
p[0] = u & 0xff;
p[1] = (u >> 8) & 0xff;
p[2] = (u >> 16) & 0xff;
p[3] = (u >> 24) & 0xff;
}
/****************************************************************************
PARAMETERS:
addr - Emulator memory address to read
RETURNS:
Byte value read from emulator memory.
REMARKS:
Reads a byte value from the emulator memory.
****************************************************************************/
static uint8_t rdb(struct X86EMU *emu, uint32_t addr)
{
if (addr > emu->mem_size - 1)
{
dbg("attempted read outside system memory: 0x%lx. Halt emulator.\r\n", addr);
X86EMU_halt_sys(emu);
}
return emu->mem_base[addr];
}
/****************************************************************************
PARAMETERS:
addr - Emulator memory address to read
RETURNS:
Word value read from emulator memory.
REMARKS:
Reads a word value from the emulator memory.
****************************************************************************/
static uint16_t rdw(struct X86EMU *emu, uint32_t addr)
{
if (addr > emu->mem_size - 2)
{
dbg("attempted read outside system memory: 0x%lx. Halt emulator.\r\n", addr);
X86EMU_halt_sys(emu);
}
return le16dec(emu->mem_base + addr);
}
/****************************************************************************
PARAMETERS:
addr - Emulator memory address to read
RETURNS:
Long value read from emulator memory.
REMARKS:
Reads a long value from the emulator memory.
****************************************************************************/
static uint32_t rdl(struct X86EMU *emu, uint32_t addr)
{
if (addr > emu->mem_size - 4)
{
dbg("attempted read outside system memory: 0x%lx. Halt emulator.\r\n", addr);
X86EMU_halt_sys(emu);
}
return le32dec(emu->mem_base + addr);
}
/****************************************************************************
PARAMETERS:
addr - Emulator memory address to read
val - Value to store
REMARKS:
Writes a byte value to emulator memory.
****************************************************************************/
static void wrb(struct X86EMU *emu, uint32_t addr, uint8_t val)
{
if (addr > emu->mem_size - 1)
{
dbg("attempted write outside system memory: 0x%lx (0x%02x). Halt emulator.\r\n", addr, val);
X86EMU_halt_sys(emu);
}
emu->mem_base[addr] = val;
}
/****************************************************************************
PARAMETERS:
addr - Emulator memory address to read
val - Value to store
REMARKS:
Writes a word value to emulator memory.
****************************************************************************/
static void wrw(struct X86EMU *emu, uint32_t addr, uint16_t val)
{
if (addr > emu->mem_size - 2)
{
dbg("attempted write outside system memory: 0x%lx (0x%04x). Halt emulator\r\n", addr, val);
X86EMU_halt_sys(emu);
}
le16enc(emu->mem_base + addr, val);
}
/****************************************************************************
PARAMETERS:
addr - Emulator memory address to write
val - Value to store
REMARKS:
Writes a long value to emulator memory.
****************************************************************************/
static void wrl(struct X86EMU *emu, uint32_t addr, uint32_t val)
{
if (addr > emu->mem_size - 4)
{
dbg("attempted write outside system memory: 0x%lx (0x%08x)\r\n", addr, val);
X86EMU_halt_sys(emu);
}
le32enc(emu->mem_base + addr, val);
}
/*----------------------------- Setup -------------------------------------*/
void X86EMU_init_default(struct X86EMU *emu)
{
int i;
emu->emu_rdb = rdb;
emu->emu_rdw = rdw;
emu->emu_rdl = rdl;
emu->emu_wrb = wrb;
emu->emu_wrw = wrw;
emu->emu_wrl = wrl;
for (i = 0; i < 256; i++)
{
emu->_X86EMU_intrTab[i] = NULL;
}
}