UNLOZE/sourcemod
8
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Remove code to handle SourceHook versions 3 and lower.

Browse Source
This commit is contained in:
David Anderson
2015-09-09 19:00:18 -07:00
parent b548ba7b58
commit fd961f4712
5 changed files with 14 additions and 349 deletions
Download Patch File Download Diff File Expand all files Collapse all files
core/ConsoleDetours.cpp
-326
View File
@@ -70,17 +70,11 @@
SH_DECL_EXTERN0_void(ConCommand, Dispatch, SH_NOATTRIB, false);
# endif
#else
# if SH_IMPL_VERSION >= 4
extern int __SourceHook_FHVPAddConCommandDispatch(void *,bool,class fastdelegate::FastDelegate0<void>,bool);
extern int __SourceHook_FHAddConCommandDispatch(void *, bool, class fastdelegate::FastDelegate0<void>);
# else
extern bool __SourceHook_FHAddConCommandDispatch(void *, bool, class fastdelegate::FastDelegate0<void>);
# endif
extern bool __SourceHook_FHRemoveConCommandDispatch(void *, bool, class fastdelegate::FastDelegate0<void>);
#endif
#if SH_IMPL_VERSION >= 4
class GenericCommandHooker : public IConCommandLinkListener
{
struct HackInfo
@@ -264,308 +258,6 @@ public:
}
};
/**
* END DVP HOOK VERSION
*/
#else /* SH_IMPL_VERSION >= 4 */
/**
* BEGIN ENGINE DETOUR VERSION
*/
# include <jit/jit_helpers.h>
# include <jit/x86/x86_macros.h>
class GenericCommandHooker
{
struct Patch
{
Patch() : applied(false)
{
}
bool applied;
void *base;
unsigned char search[16];
size_t search_len;
size_t offset;
size_t saveat;
int regparam;
void *detour;
};
Patch ces;
Patch cgc;
public:
static void DelayedActivation(void *inparam)
{
GenericCommandHooker *cdtrs = reinterpret_cast<GenericCommandHooker*>(inparam);
/* Safe to re-enter because the frame queue is lock+swapped. */
if ((!cdtrs->ces.applied || !cdtrs->cgc.applied) &&
g_HL2.PeekCommandStack() != NULL)
{
g_SourceMod.AddFrameAction(GenericCommandHooker::DelayedActivation, cdtrs);
return;
}
if (!cdtrs->ces.applied)
cdtrs->ApplyPatch(&cdtrs->ces);
if (!cdtrs->cgc.applied)
cdtrs->ApplyPatch(&cdtrs->cgc);
}
bool Enable()
{
const char *platform = NULL;
# if defined(PLATFORM_WINDOWS)
platform = "Windows";
# else
void *addrInBase = (void *)g_SMAPI->GetEngineFactory(false);
Dl_info info;
if (!dladdr(addrInBase, &info))
{
g_Logger.LogError("Command filter could not find engine name");
return false;
}
if (strstr(info.dli_fname, "engine_i486"))
{
platform = "Linux_486";
}
else if (strstr(info.dli_fname, "engine_i686"))
{
platform = "Linux_686";
}
else if (strstr(info.dli_fname, "engine_amd"))
{
platform = "Linux_AMD";
}
else
{
g_Logger.LogError("Command filter could not determine engine (%s)", info.dli_fname);
return false;
}
# endif
if (!PrepPatch("Cmd_ExecuteString", "CES", platform, &ces))
return false;
if (!PrepPatch("CGameClient::ExecuteString", "CGC", platform, &cgc))
return false;
if (g_HL2.PeekCommandStack() != NULL)
{
g_SourceMod.AddFrameAction(GenericCommandHooker::DelayedActivation, this);
return true;
}
ApplyPatch(&ces);
ApplyPatch(&cgc);
return true;
}
void Disable()
{
UndoPatch(&ces);
UndoPatch(&cgc);
}
private:
# if !defined PLATFORM_WINDOWS
# define PAGE_READWRITE PROT_READ|PROT_WRITE
# define PAGE_EXECUTE_READ PROT_READ|PROT_EXEC
static inline uintptr_t AddrToPage(uintptr_t address)
{
return (address & ~(uintptr_t(sysconf(_SC_PAGE_SIZE) - 1)));
}
# endif
void Protect(void *addr, size_t length, int prot)
{
# if defined PLATFORM_WINDOWS
DWORD ignore;
VirtualProtect(addr, length, prot, &ignore);
# else
uintptr_t startPage = AddrToPage(uintptr_t(addr));
length += (uintptr_t(addr) - startPage);
mprotect((void*)startPage, length, prot);
# endif
}
void UndoPatch(Patch *patch)
{
if (!patch->applied || patch->detour == NULL)
return;
g_pSourcePawn->FreePageMemory(patch->detour);
unsigned char *source = (unsigned char *)patch->base + patch->offset;
Protect(source, patch->search_len, PAGE_READWRITE);
for (size_t i = 0; i < patch->search_len; i++)
source[i] = patch->search[i];
Protect(source, patch->search_len, PAGE_EXECUTE_READ);
}
void ApplyPatch(Patch *patch)
{
assert(!patch->applied);
size_t length = 0;
void *callback = (void*)&ConsoleDetours::Dispatch;
/* Bogus assignment to make compiler is doing the right thing. */
patch->detour = callback;
/* Assemgle the detour. */
JitWriter writer;
writer.outbase = NULL;
writer.outptr = NULL;
do
{
/* Need a specific register, or value on stack? */
if (patch->regparam != -1)
IA32_Push_Reg(&writer, patch->regparam);
/* Call real function. */
IA32_Write_Jump32_Abs(&writer, IA32_Call_Imm32(&writer, 0), callback);
/* Restore stack. */
if (patch->regparam != -1)
IA32_Pop_Reg(&writer, patch->regparam);
/* Copy any saved bytes */
if (patch->saveat)
{
for (size_t i = patch->saveat; i < patch->search_len; i++)
{
writer.write_ubyte(patch->search[i]);
}
}
/* Jump back to the caller. */
unsigned char *target = (unsigned char *)patch->base + patch->offset + patch->search_len;
IA32_Jump_Imm32_Abs(&writer, target);
/* Assemble, if we can. */
if (writer.outbase == NULL)
{
length = writer.outptr - writer.outbase;
patch->detour = g_pSourcePawn->AllocatePageMemory(length);
if (patch->detour == NULL)
{
g_Logger.LogError("Ran out of memory!");
return;
}
g_pSourcePawn->SetReadWrite(patch->detour);
writer.outbase = (jitcode_t)patch->detour;
writer.outptr = writer.outbase;
}
else
{
break;
}
} while (true);
g_pSourcePawn->SetReadExecute(patch->detour);
unsigned char *source = (unsigned char *)patch->base + patch->offset;
Protect(source, 6, PAGE_READWRITE);
source[0] = 0xFF;
source[1] = 0x25;
*(void **)&source[2] = &patch->detour;
Protect(source, 6, PAGE_EXECUTE_READ);
patch->applied = true;
}
bool PrepPatch(const char *signature, const char *name, const char *platform, Patch *patch)
{
/* Get the base address of the function. */
if (!g_pGameConf->GetMemSig(signature, &patch->base) || patch->base == NULL)
{
g_Logger.LogError("Command filter could not find signature: %s", signature);
return false;
}
const char *value;
char keyname[255];
/* Get the verification bytes that will be written over. */
UTIL_Format(keyname, sizeof(keyname), "%s_Patch_%s", name, platform);
if ((value = g_pGameConf->GetKeyValue(keyname)) == NULL)
{
g_Logger.LogError("Command filter could not find key: %s", keyname);
return false;
}
patch->search_len = UTIL_DecodeHexString(patch->search, sizeof(patch->search), value);
if (patch->search_len < 6)
{
g_Logger.LogError("Error decoding %s value, or not long enough", keyname);
return false;
}
/* Get the offset into the function. */
UTIL_Format(keyname, sizeof(keyname), "%s_Offset_%s", name, platform);
if ((value = g_pGameConf->GetKeyValue(keyname)) == NULL)
{
g_Logger.LogError("Command filter could not find key: %s", keyname);
return false;
}
patch->offset = atoi(value);
if (patch->offset > 20000)
{
g_Logger.LogError("Command filter %s value is bogus", keyname);
return false;
}
/* Get the number of bytes to save from what was written over. */
patch->saveat = 0;
UTIL_Format(keyname, sizeof(keyname), "%s_Save_%s", name, platform);
if ((value = g_pGameConf->GetKeyValue(keyname)) != NULL)
{
patch->saveat = atoi(value);
if (patch->saveat >= patch->search_len)
{
g_Logger.LogError("Command filter %s value is too large", keyname);
return false;
}
}
/* Get register for parameter, if any. */
patch->regparam = -1;
UTIL_Format(keyname, sizeof(keyname), "%s_Reg_%s", name, platform);
if ((value = g_pGameConf->GetKeyValue(keyname)) != NULL)
{
patch->regparam = atoi(value);
}
/* Everything loaded from gamedata, make sure the patch will succeed. */
unsigned char *address = (unsigned char *)patch->base + patch->offset;
for (size_t i = 0; i < patch->search_len; i++)
{
if (address[i] != patch->search[i])
{
g_Logger.LogError("Command filter %s has changed (byte %x is not %x sub-offset %d)",
name, address[i], patch->search[i], i);
return false;
}
}
return true;
}
};
static bool dummy_hook_set = false;
void DummyHook()
{
if (dummy_hook_set)
{
dummy_hook_set = false;
RETURN_META(MRES_SUPERCEDE);
}
}
#endif
/**
* BEGIN THE ACTUALLY GENERIC CODE.
*/
@@ -722,23 +414,5 @@ cell_t ConsoleDetours::Dispatch(ConCommand *pBase)
res = g_ConsoleDetours.InternalDispatch(g_ConCmds.GetCommandClient(), &cargs);
}
#if SH_IMPL_VERSION < 4
if (res >= Pl_Handled)
{
/* See bug 4020 - we can't optimize this because looking at the vtable
* is probably more expensive, since there's no SH_GET_ORIG_VFNPTR_ENTRY.
*/
SH_ADD_HOOK(ConCommand, Dispatch, pBase, SH_STATIC(DummyHook), false);
dummy_hook_set = true;
pBase->Dispatch();
SH_REMOVE_HOOK(ConCommand, Dispatch, pBase, SH_STATIC(DummyHook), false);
}
else
{
/* Make sure the command gets invoked. See bug 4019 on making this better. */
pBase->Dispatch();
}
#endif
return res;
}
core/CoreConfig.cpp
-4
View File
@@ -77,11 +77,7 @@ void Hook_ExecDispatchPre(const CCommand &cmd)
SH_DECL_EXTERN0_void(ConCommand, Dispatch, SH_NOATTRIB, false);
void Hook_ExecDispatchPre()
#else
# if SH_IMPL_VERSION >= 4
extern int __SourceHook_FHAddConCommandDispatch(void *,bool,class fastdelegate::FastDelegate0<void>);
# else
extern bool __SourceHook_FHAddConCommandDispatch(void *,bool,class fastdelegate::FastDelegate0<void>);
# endif
extern bool __SourceHook_FHRemoveConCommandDispatch(void *,bool,class fastdelegate::FastDelegate0<void>);
void Hook_ExecDispatchPre()
#endif
core/NextMap.cpp
-4
View File
@@ -55,11 +55,7 @@ SH_DECL_EXTERN1_void(ConCommand, Dispatch, SH_NOATTRIB, false, const CCommand &)
#elif SOURCE_ENGINE == SE_DARKMESSIAH
SH_DECL_EXTERN0_void(ConCommand, Dispatch, SH_NOATTRIB, false);
#else
# if SH_IMPL_VERSION >= 4
extern int __SourceHook_FHAddConCommandDispatch(void *,bool,class fastdelegate::FastDelegate0<void>);
# else
extern bool __SourceHook_FHAddConCommandDispatch(void *,bool,class fastdelegate::FastDelegate0<void>);
#endif
extern bool __SourceHook_FHRemoveConCommandDispatch(void *,bool,class fastdelegate::FastDelegate0<void>);
#endif
core/PlayerManager.cpp
-4
View File
@@ -105,11 +105,7 @@ SH_DECL_EXTERN1_void(ConCommand, Dispatch, SH_NOATTRIB, false, const CCommand &)
#elif SOURCE_ENGINE == SE_DARKMESSIAH
SH_DECL_EXTERN0_void(ConCommand, Dispatch, SH_NOATTRIB, false);
#else
# if SH_IMPL_VERSION >= 4
extern int __SourceHook_FHAddConCommandDispatch(void *,bool,class fastdelegate::FastDelegate0<void>);
# else
extern bool __SourceHook_FHAddConCommandDispatch(void *,bool,class fastdelegate::FastDelegate0<void>);
# endif
extern bool __SourceHook_FHRemoveConCommandDispatch(void *,bool,class fastdelegate::FastDelegate0<void>);
#endif
core/sourcemm_api.cpp
+3
View File
@@ -66,6 +66,9 @@ PLUGIN_EXPOSE(SourceMod, g_SourceMod_Core);
#if !defined(METAMOD_PLAPI_VERSION) && PLAPI_VERSION < 11
# error "SourceMod requires Metamod:Source 1.8 or higher."
#endif
#if SH_IMPL_VERSION < 4
# error "SourceMod requires a newer version of SourceHook."
#endif
ConVar sourcemod_version("sourcemod_version", SOURCEMOD_VERSION, FCVAR_SPONLY|FCVAR_REPLICATED|FCVAR_NOTIFY, "SourceMod Version");