mirror of
https://github.com/danbulant/Cosmos
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33 lines
683 B
Text
33 lines
683 B
Text
Group DebugStub
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# Location where INT3 has been injected.
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# 0 if no INT3 is active.
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var AsmBreakEIP
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# Old byte before INT3 was injected.
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# Only 1 byte is used.
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var AsmOrigByte
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procedure SetAsmBreak {
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ComReadEAX()
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EDI = EAX
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# Save the old byte
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EAX = EDI[0]
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.AsmOrigByte = EAX
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# Inject INT3
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EDI[0] = $CC
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# Save EIP of the break
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.AsmBreakEIP = EDI
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}
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procedure ClearAsmBreak {
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EDI = .AsmBreakEIP
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# If 0, we don't need to clear an older one.
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if EDI = 0 exit
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# Clear old break point and set back to original opcode / partial opcode
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EAX = .AsmOrigByte
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EDI[0] = EAX
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.AsmOrigByte = 0
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}
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