mirror of
https://github.com/danbulant/Cosmos
synced 2026-05-21 21:38:52 +00:00
33 lines
692 B
Text
33 lines
692 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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