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Why? Back in the day, after the pain of debugging on Timex, and MS-DOS debug, the confort of Turbo Assembler debugger felt really nice.
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Gdb is an excellent debugger for assembly, even when the original code was written in C

I would automatically type

(gdb) x/4i $pc

when opening a coredump out of habit.

But using nasm, then looking as gas style assembly in the debugger might be a bit more jarring.

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What's the better choice?
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Setting a breakpoint in the debug registers DB0 through DB7 and dumping registers and memory in your own debug exception handler.
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