pealstub.c
资源名称:tcpmp.rar [点击查看]
上传用户:wstnjxml
上传日期:2014-04-03
资源大小:7248k
文件大小:3k
源码类别:
Windows CE
开发平台:
C/C++
- /********** * Copyright (c) 2004 Greg Parker. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY GREG PARKER ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. **********/ #include "pealstub.h" #include <PceNativeCall.h> typedef unsigned long uint32_t;
- // Emulator state for calls back into 68K (set by PealArmStub) pcecall PceCall = {0,0,0};
- // Must match struct PealArgs in m68k/peal.c typedef struct { void *fn; void *arg; void *got; } PealArgs;
- static inline void SetR9(void* p)
- {
- asm volatile(
- "mov r9,%0nt"
- ::"r"(p):"cc");
- }
- static inline void* GetR9()
- {
- void* p;
- asm volatile(
- "mov %0, r9nt"
- : "=&r"(p)::"cc");
- return p;
- }
- // reads unaligned and byte-swaps #define read32(a) ( ((((unsigned char *)(a))[0]) << 24) | ((((unsigned char *)(a))[1]) << 16) | ((((unsigned char *)(a))[2]) << 8) | ((((unsigned char *)(a))[3]) << 0) ) // interfacearm attribute means PealArmStub can be called from // non-interworking ARM code like PceNativeCall if PealArmStub is // compiled as Thumb code. uint32_t PealArmStub(const void *emulStateP, PealArgs *args, Call68KFuncType *call68KFuncP) {
- pcecall old; uint32_t (*fn)(void *); void *arg;
- register void *got asm("r10");
- uint32_t result;
- void* SysReg = GetR9();
- // Unpack args from PealCall() and store GOT in R10 fn = (uint32_t(*)(void *)) read32(&args->fn); arg = (void *) read32(&args->arg); got = (void *) read32(&args->got);
- old = PceCall;
- PceCall.SysReg = SysReg;
- PceCall.State = emulStateP;
- PceCall.Func = call68KFuncP;
- // Call the function result = (*fn)(arg); // Restore old PceNativeCall values PceCall = old;
- SetR9(SysReg);
- return result; }