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Patch KiGetOrPutUserData to allows usage of our mapped memory inside kernel

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This commit is contained in:
Maschell 2021-11-06 17:06:31 +01:00
parent 60d000a277
commit c608b60a1b
1 changed files with 18 additions and 0 deletions
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18
source/function_replacements.cpp
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@ -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);