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Preliminary changes for shared lib safetyhook

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Kenzzer 2025-04-03 13:19:17 +00:00
parent 30da01763d
commit ccaf7f2f44
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GPG Key ID: BD2A655EB5DC87A9
4 changed files with 2 additions and 149 deletions
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1
extensions/dhooks/DynamicHooks/hook.cpp
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@ -42,7 +42,6 @@
#else
#include <macro-assembler-x86.h>
#include <jit/jit_helpers.h>
#include <CDetour/detourhelpers.h>
using namespace sp;
#endif

147
public/CDetour/detourhelpers.h
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@ -1,147 +0,0 @@
/**
* vim: set ts=4 :
* =============================================================================
* SourceMod
* Copyright (C) 2004-2010 AlliedModders LLC. All rights reserved.
* =============================================================================
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License, version 3.0, as published by the
* Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, AlliedModders LLC gives you permission to link the
* code of this program (as well as its derivative works) to "Half-Life 2," the
* "Source Engine," the "SourcePawn JIT," and any Game MODs that run on software
* by the Valve Corporation. You must obey the GNU General Public License in
* all respects for all other code used. Additionally, AlliedModders LLC grants
* this exception to all derivative works. AlliedModders LLC defines further
* exceptions, found in LICENSE.txt (as of this writing, version JULY-31-2007),
* or <http://www.sourcemod.net/license.php>.
*
* Version: $Id: detourhelpers.h 248 2008-08-27 00:56:22Z pred $
*/
#ifndef _INCLUDE_SOURCEMOD_DETOURHELPERS_H_
#define _INCLUDE_SOURCEMOD_DETOURHELPERS_H_
#if defined PLATFORM_POSIX
#include <sys/mman.h>
#define PAGE_EXECUTE_READWRITE PROT_READ|PROT_WRITE|PROT_EXEC
#endif
#include <amtl/am-bits.h>
#include <jit/x86/x86_macros.h>
#include <amtl/os/am-system-errors.h>
#include <cstdio>
struct patch_t
{
patch_t()
{
patch[0] = 0;
bytes = 0;
}
unsigned char patch[20];
size_t bytes;
};
inline void ProtectMemory(void *addr, int length, int prot)
{
char error[256];
#if defined PLATFORM_POSIX
long pageSize = sysconf(_SC_PAGESIZE);
void *startPage = ke::AlignedBase(addr, pageSize);
void *endPage = ke::AlignedBase((void *)((intptr_t)addr + length), pageSize);
if (mprotect(startPage, ((intptr_t)endPage - (intptr_t)startPage) + pageSize, prot) == -1) {
ke::FormatSystemError(error, sizeof(error));
fprintf(stderr, "mprotect: %s\n", error);
}
#elif defined PLATFORM_WINDOWS
DWORD old_prot;
if (!VirtualProtect(addr, length, prot, &old_prot)) {
ke::FormatSystemError(error, sizeof(error));
fprintf(stderr, "VirtualProtect: %s\n", error);
}
#endif
}
inline void SetMemPatchable(void *address, size_t size)
{
ProtectMemory(address, (int)size, PAGE_EXECUTE_READWRITE);
}
inline void PatchRelJump32(unsigned char *target, void *callback)
{
SetMemPatchable(target, 5);
// jmp <32-bit displacement>
target[0] = IA32_JMP_IMM32;
*(int32_t *)(&target[1]) = int32_t((unsigned char *)callback - (target + 5));
}
inline void PatchAbsJump64(unsigned char *target, void *callback)
{
int i = 0;
SetMemPatchable(target, 14);
// push <lower 32-bits> ; allocates 64-bit stack space on x64
// mov [rsp+4], <upper 32-bits> ; unnecessary if upper bits are 0
// ret ; jump to address on stack
target[i++] = IA32_PUSH_IMM32;
*(int32_t *)(&target[i]) = int32_t(int64_t(callback));
i += 4;
if ((int64_t(callback) >> 32) != 0)
{
target[i++] = IA32_MOV_RM_IMM32;
target[i++] = ia32_modrm(MOD_DISP8, 0, kREG_SIB);
target[i++] = ia32_sib(NOSCALE, kREG_NOIDX, kREG_ESP);
target[i++] = 0x04;
*(int32_t *)(&target[i]) = (int64_t(callback) >> 32);
i += 4;
}
target[i] = IA32_RET;
}
inline void DoGatePatch(unsigned char *target, void *callback)
{
#if defined(_WIN64) || defined(__x86_64__)
int64_t diff = int64_t(callback) - (int64_t(target) + 5);
int32_t upperBits = (diff >> 32);
if (upperBits == 0 || upperBits == -1)
PatchRelJump32(target, callback);
else
PatchAbsJump64(target, callback);
#else
PatchRelJump32(target, callback);
#endif
}
inline void ApplyPatch(void *address, int offset, const patch_t *patch, patch_t *restore)
{
unsigned char *addr = (unsigned char *)address + offset;
SetMemPatchable(addr, patch->bytes);
if (restore)
{
for (size_t i=0; i<patch->bytes; i++)
{
restore->patch[i] = addr[i];
}
restore->bytes = patch->bytes;
}
for (size_t i=0; i<patch->bytes; i++)
{
addr[i] = patch->patch[i];
}
}
#endif //_INCLUDE_SOURCEMOD_DETOURHELPERS_H_

1
public/CDetour/detours.h
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@ -32,6 +32,7 @@
#ifndef _INCLUDE_SOURCEMOD_DETOURS_H_
#define _INCLUDE_SOURCEMOD_DETOURS_H_
#define SAFETYHOOK_SHARED_LIB true
#include "safetyhook.hpp"
#include <smsdk_ext.h>

2
public/safetyhook

@ -1 +1 @@
Subproject commit ab76f94ee4ef28187cc08030599577996fcba3be
Subproject commit 238f938e55ddadafd5a6d2f6c2cff58dedf69891