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functionHooks: fix incorrect protlen calcs
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parent
dd0714c22a
commit
9132660768
1 changed files with 6 additions and 3 deletions
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@ -128,8 +128,11 @@ bool CFunctionHook::hook() {
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(uint64_t)((uint8_t*)m_pSource + sizeof(ABSOLUTE_JMP_ADDRESS));
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// make jump to hk
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mprotect((uint8_t*)m_pSource - ((uint64_t)m_pSource) % sysconf(_SC_PAGE_SIZE), sysconf(_SC_PAGE_SIZE), PROT_READ | PROT_WRITE | PROT_EXEC);
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memcpy(m_pSource, ABSOLUTE_JMP_ADDRESS, sizeof(ABSOLUTE_JMP_ADDRESS));
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const auto PAGESIZE = sysconf(_SC_PAGE_SIZE);
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const uint8_t* PROTSTART = (uint8_t*)m_pSource - ((uint64_t)m_pSource % PAGESIZE);
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const size_t PROTLEN = std::ceil((float)(HOOKSIZE + ((uint64_t)m_pSource - (uint64_t)PROTSTART)) / (float)PAGESIZE) * PAGESIZE;
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mprotect((uint8_t*)PROTSTART, PROTLEN, PROT_READ | PROT_WRITE | PROT_EXEC);
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memcpy((uint8_t*)m_pSource, ABSOLUTE_JMP_ADDRESS, sizeof(ABSOLUTE_JMP_ADDRESS));
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// make popq %rax and NOP all remaining
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memcpy((uint8_t*)m_pSource + sizeof(ABSOLUTE_JMP_ADDRESS), POP_RAX, sizeof(POP_RAX));
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@ -140,7 +143,7 @@ bool CFunctionHook::hook() {
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*(uint64_t*)((uint8_t*)m_pSource + ABSOLUTE_JMP_ADDRESS_OFFSET) = (uint64_t)(m_pDestination);
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// revert mprot
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mprotect((uint8_t*)m_pSource - ((uint64_t)m_pSource) % sysconf(_SC_PAGE_SIZE), sysconf(_SC_PAGE_SIZE), PROT_READ | PROT_EXEC);
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mprotect((uint8_t*)PROTSTART, PROTLEN, PROT_READ | PROT_EXEC);
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// set original addr to trampo addr
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m_pOriginal = m_pTrampolineAddr;
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