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Remove useless rax preserve across callq
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parent
03d7651916
commit
18229043fa
1 changed files with 2 additions and 4 deletions
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@ -82,15 +82,13 @@ bool CFunctionHook::hook() {
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// nop
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// nop
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static constexpr uint8_t NOP = 0x90;
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static constexpr uint8_t NOP = 0x90;
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/*
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/*
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pushq %rax
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movabs $0,%rax
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movabs $0,%rax
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callq *%rax
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callq *%rax
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popq %rax
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offset for addr: 3
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offset for addr: 3
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*/
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*/
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static constexpr uint8_t CALL_WITH_RAX[] = {0x50, 0x48, 0xB8, 0xEF, 0xBE, 0xAD, 0xDE, 0x00, 0x00, 0x00, 0x00, 0xFF, 0x10, 0x58};
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static constexpr uint8_t CALL_WITH_RAX[] = {0x48, 0xB8, 0xEF, 0xBE, 0xAD, 0xDE, 0x00, 0x00, 0x00, 0x00, 0xFF, 0x10};
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static constexpr size_t CALL_WITH_RAX_ADDRESS_OFFSET = 3;
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static constexpr size_t CALL_WITH_RAX_ADDRESS_OFFSET = 2;
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// get minimum size to overwrite
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// get minimum size to overwrite
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const auto HOOKSIZE = probeMinimumJumpSize(m_pSource, sizeof(ABSOLUTE_JMP_ADDRESS) + sizeof(PUSH_RAX) + sizeof(POP_RAX));
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const auto HOOKSIZE = probeMinimumJumpSize(m_pSource, sizeof(ABSOLUTE_JMP_ADDRESS) + sizeof(PUSH_RAX) + sizeof(POP_RAX));
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