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antidebugcrash.h
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/* -----------------------------------------------------------------------------
*
* Copyright (c) 2014-2019 Alexis Naveros.
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
*
* -----------------------------------------------------------------------------
*/
/*
#define ANTIDEBUG_NUMBER 000
*/
#ifndef ASM_ID_PREFIX
#ifdef __APPLE__
#define ASM_ID_PREFIX "_"
#else
#define ASM_ID_PREFIX ""
#endif
#endif
#ifndef ANTIDEBUG_HASH
#define ANTIDEBUG_HASH(x) (((x^0x9e1f)+((x>>2)^0x37a))^(((x<<3)+0x73fa)+((x^0x4b16)>>5))^((x<<1)+0xa153))
#endif
#define ANTIDEBUG_TMP_RANDOM ANTIDEBUG_HASH(ANTIDEBUG_NUMBER)
#define ANTIDEBUG_TMP_OFFSET (((ANTIDEBUG_TMP_RANDOM)>>1)&0xfff0)
extern void CC_CONCATENATE(antiDebugCrashTarget,ANTIDEBUG_NUMBER)() __asm__( ASM_ID_PREFIX CC_STRINGIFY(CC_CONCATENATE(antiDebugCrashTarget,ANTIDEBUG_NUMBER)) );
const uintptr_t CC_CONCATENATE(antiDebugCrashBase,ANTIDEBUG_NUMBER) __asm__( ASM_ID_PREFIX CC_STRINGIFY(CC_CONCATENATE(antiDebugCrashBase,ANTIDEBUG_NUMBER)) ) = ( (uintptr_t)&(CC_CONCATENATE(antiDebugCrashTarget,ANTIDEBUG_NUMBER)) ) - ANTIDEBUG_TMP_OFFSET;
#if ( ANTIDEBUG_TMP_RANDOM & 0x3 ) == 0x0
#define ANTIDEBUG_TMP_OP0 "add"
#elif ( ANTIDEBUG_TMP_RANDOM & 0x3 ) == 0x1
#define ANTIDEBUG_TMP_OP0 "sub"
#elif ( ANTIDEBUG_TMP_RANDOM & 0x3 ) == 0x2
#define ANTIDEBUG_TMP_OP0 "and"
#else
#define ANTIDEBUG_TMP_OP0 "or"
#endif
#if ( ANTIDEBUG_TMP_RANDOM & 0x30 ) == 0x00
#define ANTIDEBUG_TMP_OP1 "add"
#elif ( ANTIDEBUG_TMP_RANDOM & 0x30 ) == 0x10
#define ANTIDEBUG_TMP_OP1 "sub"
#elif ( ANTIDEBUG_TMP_RANDOM & 0x30 ) == 0x20
#define ANTIDEBUG_TMP_OP1 "and"
#else
#define ANTIDEBUG_TMP_OP1 "or"
#endif
#if ( ANTIDEBUG_TMP_RANDOM & 0x300 ) == 0x000
#define ANTIDEBUG_TMP_REG0 "edx"
#elif ( ANTIDEBUG_TMP_RANDOM & 0x300 ) == 0x100
#define ANTIDEBUG_TMP_REG0 "esi"
#else
#define ANTIDEBUG_TMP_REG0 "edi"
#endif
#define ANTIDEBUG_TMP_CRAP0 (((ANTIDEBUG_TMP_RANDOM)>>1)&0x3ff)
#define ANTIDEBUG_TMP_CRAP1 ((((ANTIDEBUG_TMP_RANDOM)>>5)&0xff)<<2)
#if CPUCONF_WORD_SIZE == 64
static inline uint32_t CC_CONCATENATE(antiDebugCrash,ANTIDEBUG_NUMBER)( uint32_t in0, uint32_t in1 )
{
uint32_t out;
__asm__ __volatile__(
"movabsq " ASM_ID_PREFIX CC_STRINGIFY(CC_CONCATENATE(antiDebugCrashBase,ANTIDEBUG_NUMBER)) ", %%rax\n"
"" ANTIDEBUG_TMP_OP0 "l $" CC_STRINGIFY(ANTIDEBUG_TMP_CRAP0) ", %%" ANTIDEBUG_TMP_REG0 "\n"
"addq $" CC_STRINGIFY(ANTIDEBUG_TMP_OFFSET) ", %%rax\n"
".byte 0xf0\n"
"" ANTIDEBUG_TMP_OP1 "l $" CC_STRINGIFY(ANTIDEBUG_TMP_CRAP1) ", %%ebx\n"
"" ASM_ID_PREFIX CC_STRINGIFY(CC_CONCATENATE(antiDebugCrashTarget,ANTIDEBUG_NUMBER)) ":\n"
: "=b" (out)
: "0" (in0), "c" (in1)
: "rax", ANTIDEBUG_TMP_REG0 );
return out;
}
#elif CPUCONF_WORD_SIZE == 32
static inline uint32_t CC_CONCATENATE(antiDebugCrash,ANTIDEBUG_NUMBER)( uint32_t in0, uint32_t in1 )
{
uint32_t out;
__asm__ __volatile__(
"movl " ASM_ID_PREFIX CC_STRINGIFY(CC_CONCATENATE(antiDebugCrashBase,ANTIDEBUG_NUMBER)) ", %%eax\n"
"" ANTIDEBUG_TMP_OP0 "l $" CC_STRINGIFY(ANTIDEBUG_TMP_CRAP0) ", %%" ANTIDEBUG_TMP_REG0 "\n"
"addl $" CC_STRINGIFY(ANTIDEBUG_TMP_OFFSET) ", %%eax\n"
".byte 0xf0\n"
"" ANTIDEBUG_TMP_OP1 "l $" CC_STRINGIFY(ANTIDEBUG_TMP_CRAP1) ", %%ebx\n"
"" ASM_ID_PREFIX CC_STRINGIFY(CC_CONCATENATE(antiDebugCrashTarget,ANTIDEBUG_NUMBER)) ":\n"
: "=b" (out)
: "0" (in0), "c" (in1)
: "eax", ANTIDEBUG_TMP_REG0 );
return out;
}
#else
#error
#endif
#undef ANTIDEBUG_TMP_RANDOM
#undef ANTIDEBUG_TMP_OFFSET
#undef ANTIDEBUG_TMP_CRAP0
#undef ANTIDEBUG_TMP_CRAP1
#undef ANTIDEBUG_TMP_OP0
#undef ANTIDEBUG_TMP_OP1
#undef ANTIDEBUG_TMP_REG0
#undef ANTIDEBUG_NUMBER