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Merge pull request #328 from WPMGPRoSToTeMa/selinuxcompatibility

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SELinux compatibility: memalign -> mmap
This commit is contained in:
Vincent Herbet 2016-01-04 17:27:09 +01:00
commit 0af2c0e4c1
7 changed files with 33 additions and 17 deletions
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9
amxmodx/modules.cpp
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@ -300,10 +300,10 @@ int load_amxscript(AMX *amx, void **program, const char *filename, char error[64
#elif defined(__GNUC__)
# if defined(__APPLE__)
amx->base = (unsigned char *)valloc(amx->code_size);
mprotect((void *)amx->base, amx->code_size, PROT_READ | PROT_WRITE | PROT_EXEC);
# else
amx->base = (unsigned char *)memalign(sysconf(_SC_PAGESIZE), amx->code_size);
amx->base = (unsigned char *)mmap(nullptr, amx->code_size, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
# endif
mprotect((void *)amx->base, amx->code_size, PROT_READ|PROT_WRITE|PROT_EXEC);
#endif
if (amx->base)
memcpy(amx->base, np, amx->code_size);
@ -562,6 +562,7 @@ int unload_amxscript(AMX* amx, void** program)
{
#if defined JIT
int flags = amx->flags;
long code_size = amx->code_size;
#endif
Debugger *pDebugger = (Debugger *)amx->userdata[UD_DEBUGGER];
@ -592,12 +593,16 @@ int unload_amxscript(AMX* amx, void** program)
{
delete [] prg;
} else {
#ifdef __linux__
munmap(prg, code_size);
#else
#ifdef free
#undef free
free(prg);
#define free(ptr) m_deallocator(__FILE__, __LINE__, __FUNCTION__, m_alloc_free, ptr)
#else
free(prg);
#endif
#endif
}
#elif defined WIN32

8
amxmodx/natives.cpp
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@ -468,10 +468,10 @@ static cell AMX_NATIVE_CALL register_native(AMX *amx, cell *params)
#elif defined(__GNUC__)
# if defined(__APPLE__)
pNative->pfn = (char *)valloc(size+10);
mprotect((void *)pNative->pfn, size + 10, PROT_READ | PROT_WRITE | PROT_EXEC);
# else
pNative->pfn = (char *)memalign(sysconf(_SC_PAGESIZE), size+10);
pNative->pfn = (char *)mmap(nullptr, size + 10, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
# endif
mprotect((void *)pNative->pfn, size+10, PROT_READ|PROT_WRITE|PROT_EXEC);
#endif
int id = (int)g_RegNatives.length();
@ -492,7 +492,11 @@ void ClearPluginLibraries()
ClearLibraries(LibSource_Plugin);
for (size_t i=0; i<g_RegNatives.length(); i++)
{
#ifdef __linux__
munmap(g_RegNatives[i]->pfn, amxx_DynaCodesize() + 10);
#else
delete [] g_RegNatives[i]->pfn;
#endif
delete g_RegNatives[i];
}
g_RegNatives.clear();

10
modules/hamsandwich/Trampolines.h
View File

@ -562,10 +562,10 @@ namespace Trampolines
#elif defined(__GNUC__)
# if defined(__APPLE__)
void *ret = valloc(m_size);
# else
void *ret=memalign(sysconf(_SC_PAGESIZE), m_size);
# endif
mprotect(ret,m_size,PROT_READ|PROT_WRITE|PROT_EXEC);
# else
void *ret=mmap(nullptr, m_size, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
# endif
#endif
memcpy(ret, m_buffer, m_size);
@ -588,7 +588,7 @@ namespace Trampolines
/**
* Utility to make a generic trampoline.
*/
inline void *CreateGenericTrampoline(bool thiscall, bool voidcall, bool retbuf, int paramcount, void *extraptr, void *callee)
inline void *CreateGenericTrampoline(bool thiscall, bool voidcall, bool retbuf, int paramcount, void *extraptr, void *callee, int *size)
{
Trampolines::TrampolineMaker tramp;
@ -628,7 +628,7 @@ inline void *CreateGenericTrampoline(bool thiscall, bool voidcall, bool retbuf,
}
#endif
return tramp.Finish(NULL);
return tramp.Finish(size);
};

9
modules/hamsandwich/hook.h
View File

@ -37,9 +37,10 @@ public:
int del; // 1 if this hook should be destroyed after exec
void *tramp; // trampoline for this hook
char *ent; // ent name that's being hooked
int trampSize;
Hook(void **vtable_, int entry_, void *target_, bool voidcall, bool retbuf, int paramcount, char *name) :
func(NULL), vtable(vtable_), entry(entry_), target(target_), exec(0), del(0), tramp(NULL)
func(NULL), vtable(vtable_), entry(entry_), target(target_), exec(0), del(0), tramp(NULL), trampSize(0)
{
// original function is vtable[entry]
// to not make the compiler whine, cast vtable to int **
@ -48,7 +49,7 @@ public:
// now install a trampoline
// (int thiscall, int voidcall, int paramcount, void *extraptr)
tramp = CreateGenericTrampoline(true, voidcall, retbuf, paramcount, (void*)this, target);
tramp = CreateGenericTrampoline(true, voidcall, retbuf, paramcount, (void*)this, target, &trampSize);
// Insert into vtable
#if defined(_WIN32)
@ -82,7 +83,9 @@ public:
ivtable[entry]=(int *)func;
#if defined(_WIN32)
VirtualFree(tramp, 0, MEM_RELEASE);
#elif defined(__linux__) || defined(__APPLE__)
#elif defined(__linux__)
munmap(tramp, trampSize);
#elif defined(__APPLE__)
free(tramp);
#endif

10
public/memtools/CDetour/detourhelpers.h
View File

@ -77,18 +77,20 @@ inline unsigned char *AllocatePageMemory(size_t size)
#elif defined __GNUC__
#if defined __APPLE__
unsigned char *addr = (unsigned char *)valloc(size);
#else
unsigned char *addr = (unsigned char *)memalign(sysconf(_SC_PAGESIZE), size);
#endif
mprotect(addr, size, PROT_READ | PROT_WRITE | PROT_EXEC);
#else
unsigned char *addr = (unsigned char *)mmap(nullptr, size, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
#endif
return addr;
#endif
}
inline void FreePageMemory(void *addr)
inline void FreePageMemory(void *addr, size_t size)
{
#if defined(WIN32)
VirtualFree(addr, 0, MEM_RELEASE);
#elif defined(__linux__)
munmap(addr, size);
#else
free(addr);
#endif

3
public/memtools/CDetour/detours.cpp
View File

@ -186,6 +186,7 @@ jit_rewind:
//spengine->SetReadWrite(wr.outbase);
wr.outptr = wr.outbase;
detour_trampoline = wr.outbase;
detour_trampolineSize = CodeSize;
goto jit_rewind;
}
@ -206,7 +207,7 @@ void CDetour::DeleteDetour()
if (detour_trampoline)
{
/* Free the allocated trampoline memory */
FreePageMemory(detour_trampoline);
FreePageMemory(detour_trampoline, detour_trampolineSize);
detour_trampoline = NULL;
}
}

1
public/memtools/CDetour/detours.h
View File

@ -199,6 +199,7 @@ private:
void *detour_address;
/* Address of the allocated trampoline function */
void *detour_trampoline;
size_t detour_trampolineSize;
/* Address of the callback handler */
void *detour_callback;
/* The function pointer used to call our trampoline */