diff options
| -rw-r--r-- | src/hook.c | 21 |
1 files changed, 0 insertions, 21 deletions
@@ -24,13 +24,6 @@ #include "os.h" #include "x86.h" -#ifdef _WIN32 -// try to avoid pulling in all of Windows.h for this... (redundant dllimport -// avoids warnings in hook.test.c where Windows.h is included via test.h) -__declspec(dllimport) int __stdcall FlushInstructionCache( - void *, const void *, usize); -#endif - // Warning: half-arsed hacky implementation (because that's all we really need) // Almost certainly breaks in some weird cases. Oh well! Most of the time, // vtable hooking is more reliable, this is only for, uh, emergencies. @@ -44,18 +37,6 @@ bool hook_init() { return os_mprot(trampolines, 4096, PAGE_EXECUTE_READWRITE); } -static inline void iflush(void *p, int len) { -#if defined(_WIN32) - // -1 is the current process, and it's a constant in the WDK, so it's - // assumed we can safely avoid the useless GetCurrentProcess call - FlushInstructionCache((void *)-1, p, len); -#elif defined(__GNUC__) - __builtin___clear_cache((char *)p, (char *)p + len); -#else -#error no way to flush instruction cache -#endif -} - struct hook_inline_prep_ret hook_inline_prep(void *func, void **trampoline) { uchar *p = func; // dumb hack: if we hit some thunk that immediately jumps elsewhere (which @@ -108,7 +89,6 @@ void hook_inline_commit(void *restrict prologue, void *restrict target) { u32 diff = (uchar *)target - (p + 5); // goto the hook target p[0] = X86_JMPIW; memcpy(p + 1, &diff, 4); - iflush(p, 5); } void unhook_inline(void *orig) { @@ -117,7 +97,6 @@ void unhook_inline(void *orig) { int off = mem_loads32(p + len + 1); uchar *q = p + off + 5; memcpy(q, p, 5); // XXX: not atomic atm! (does any of it even need to be?) - iflush(q, 5); } // vi: sw=4 ts=4 noet tw=80 cc=80 |