From c608b60a1bbebb28ff2c8516c1b4aaadcb4179cf Mon Sep 17 00:00:00 2001 From: Maschell Date: Sat, 6 Nov 2021 17:06:31 +0100 Subject: [PATCH] Patch KiGetOrPutUserData to allows usage of our mapped memory inside kernel --- source/function_replacements.cpp | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/source/function_replacements.cpp b/source/function_replacements.cpp index 543e3d6..d9a2fd8 100644 --- a/source/function_replacements.cpp +++ b/source/function_replacements.cpp @@ -53,6 +53,23 @@ DECL_FUNCTION(uint32_t, KiIsEffectiveRangeValid, uint32_t addressSpace, uint32_t return result; } + +#define k_memcpy ((void (*)( void*, void*,uint32_t))(0xfff09e44)) + +DECL_FUNCTION(uint32_t, KiGetOrPutUserData, void *src, uint32_t size, void *dst, bool isRead) { + // + if (isRead && MemoryMapping_EffectiveToPhysical((uint32_t) src) > 0) { + k_memcpy(dst, src, size); + return 1; + } else if (!isRead && MemoryMapping_EffectiveToPhysical((uint32_t) dst) > 0) { + // src and dst are swapped here + k_memcpy(src, dst, size); + return 1; + } + + return real_KiGetOrPutUserData(src, size, dst, isRead); +} + function_replacement_data_t function_replacements[] __attribute__((section(".data"))) = { REPLACE_FUNCTION_VIA_ADDRESS(sCheckDataRange, 0x3200cf60, 0x0100cf60), REPLACE_FUNCTION_VIA_ADDRESS(KiEffectiveToPhysical, 0xffee0aac, 0xffee0aac), @@ -60,6 +77,7 @@ function_replacement_data_t function_replacements[] __attribute__((section(".dat REPLACE_FUNCTION_VIA_ADDRESS(KiPhysicalToEffectiveUncached, 0xffee0a80, 0xffee0a80), REPLACE_FUNCTION_VIA_ADDRESS(KiIsEffectiveRangeValid, 0xffee0d6c, 0xffee0d6c), REPLACE_FUNCTION_VIA_ADDRESS(IPCKDriver_ValidatePhysicalAddress, 0xfff0cb5c, 0xfff0cb5c), + REPLACE_FUNCTION_VIA_ADDRESS(KiGetOrPutUserData, 0xffee0794, 0xffee0794), }; uint32_t function_replacements_size __attribute__((section(".data"))) = sizeof(function_replacements) / sizeof(function_replacement_data_t); \ No newline at end of file