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Diffstat (limited to 'compiler-rt/lib/interception/mach_override/mach_override.h')
| -rw-r--r-- | compiler-rt/lib/interception/mach_override/mach_override.h | 140 |
1 files changed, 0 insertions, 140 deletions
diff --git a/compiler-rt/lib/interception/mach_override/mach_override.h b/compiler-rt/lib/interception/mach_override/mach_override.h deleted file mode 100644 index 7e60cdcd619..00000000000 --- a/compiler-rt/lib/interception/mach_override/mach_override.h +++ /dev/null @@ -1,140 +0,0 @@ -/******************************************************************************* - mach_override.h - Copyright (c) 2003-2009 Jonathan 'Wolf' Rentzsch: <http://rentzsch.com> - Some rights reserved: <http://opensource.org/licenses/mit-license.php> - - ***************************************************************************/ - -/***************************************************************************//** - @mainpage mach_override - @author Jonathan 'Wolf' Rentzsch: <http://rentzsch.com> - - This package, coded in C to the Mach API, allows you to override ("patch") - program- and system-supplied functions at runtime. You can fully replace - functions with your implementations, or merely head- or tail-patch the - original implementations. - - Use it by #include'ing mach_override.h from your .c, .m or .mm file(s). - - @todo Discontinue use of Carbon's MakeDataExecutable() and - CompareAndSwap() calls and start using the Mach equivalents, if they - exist. If they don't, write them and roll them in. That way, this - code will be pure Mach, which will make it easier to use everywhere. - Update: MakeDataExecutable() has been replaced by - msync(MS_INVALIDATE). There is an OSCompareAndSwap in libkern, but - I'm currently unsure if I can link against it. May have to roll in - my own version... - @todo Stop using an entire 4K high-allocated VM page per 28-byte escape - branch island. Done right, this will dramatically speed up escape - island allocations when they number over 250. Then again, if you're - overriding more than 250 functions, maybe speed isn't your main - concern... - @todo Add detection of: b, bl, bla, bc, bcl, bcla, bcctrl, bclrl - first-instructions. Initially, we should refuse to override - functions beginning with these instructions. Eventually, we should - dynamically rewrite them to make them position-independent. - @todo Write mach_unoverride(), which would remove an override placed on a - function. Must be multiple-override aware, which means an almost - complete rewrite under the covers, because the target address can't - be spread across two load instructions like it is now since it will - need to be atomically updatable. - @todo Add non-rentry variants of overrides to test_mach_override. - - ***************************************************************************/ - -#ifdef __APPLE__ - -#ifndef _mach_override_ -#define _mach_override_ - -#include <sys/types.h> -#include <mach/error.h> - -#ifdef __cplusplus - extern "C" { -#endif - -/** - Returned if the function to be overrided begins with a 'mfctr' instruction. -*/ -#define err_cannot_override (err_local|1) - -/************************************************************************************//** - Dynamically overrides the function implementation referenced by - originalFunctionAddress with the implentation pointed to by overrideFunctionAddress. - Optionally returns a pointer to a "reentry island" which, if jumped to, will resume - the original implementation. - - @param originalFunctionAddress -> Required address of the function to - override (with overrideFunctionAddress). - @param overrideFunctionAddress -> Required address to the overriding - function. - @param originalFunctionReentryIsland <- Optional pointer to pointer to the - reentry island. Can be NULL. - @result <- err_cannot_override if the original - function's implementation begins with - the 'mfctr' instruction. - - ************************************************************************************/ - -// We're prefixing mach_override_ptr() with "__asan_" to avoid name conflicts with other -// mach_override_ptr() implementations that may appear in the client program. - mach_error_t -__asan_mach_override_ptr( - void *originalFunctionAddress, - const void *overrideFunctionAddress, - void **originalFunctionReentryIsland ); - -// Allow to use custom allocation and deallocation routines with mach_override_ptr(). -// This should help to speed up the things on x86_64. -typedef mach_error_t island_malloc( void **ptr, size_t size, void *hint ); -typedef mach_error_t island_free( void *ptr ); - - mach_error_t -__asan_mach_override_ptr_custom( - void *originalFunctionAddress, - const void *overrideFunctionAddress, - void **originalFunctionReentryIsland, - island_malloc *alloc, - island_free *dealloc ); - -/************************************************************************************//** - - - ************************************************************************************/ - -#ifdef __cplusplus - -#define MACH_OVERRIDE( ORIGINAL_FUNCTION_RETURN_TYPE, ORIGINAL_FUNCTION_NAME, ORIGINAL_FUNCTION_ARGS, ERR ) \ - { \ - static ORIGINAL_FUNCTION_RETURN_TYPE (*ORIGINAL_FUNCTION_NAME##_reenter)ORIGINAL_FUNCTION_ARGS; \ - static bool ORIGINAL_FUNCTION_NAME##_overriden = false; \ - class mach_override_class__##ORIGINAL_FUNCTION_NAME { \ - public: \ - static kern_return_t override(void *originalFunctionPtr) { \ - kern_return_t result = err_none; \ - if (!ORIGINAL_FUNCTION_NAME##_overriden) { \ - ORIGINAL_FUNCTION_NAME##_overriden = true; \ - result = mach_override_ptr( (void*)originalFunctionPtr, \ - (void*)mach_override_class__##ORIGINAL_FUNCTION_NAME::replacement, \ - (void**)&ORIGINAL_FUNCTION_NAME##_reenter ); \ - } \ - return result; \ - } \ - static ORIGINAL_FUNCTION_RETURN_TYPE replacement ORIGINAL_FUNCTION_ARGS { - -#define END_MACH_OVERRIDE( ORIGINAL_FUNCTION_NAME ) \ - } \ - }; \ - \ - err = mach_override_class__##ORIGINAL_FUNCTION_NAME::override((void*)ORIGINAL_FUNCTION_NAME); \ - } - -#endif - -#ifdef __cplusplus - } -#endif -#endif // _mach_override_ - -#endif // __APPLE__ |
