Re: [GIT PULL] x86 breakpoint regression fix
From: Maciej W. Rozycki
Date: Wed Jun 30 2010 - 10:40:58 EST
On Wed, 30 Jun 2010, Frederic Weisbecker wrote:
> - icebp/int01 trap. This instruction (0xf1) is undocumented and
> generates an int 1 exception. Unlike single step through TF
> flag, it doesn't set the single step origin of the exception
> in dr6.
Not quite completely undocumented, but a bit obscure indeed. GDB calls
this instruction ICEBP and some Intel sources -- INT1. It's been around
for a while (at least since 80286) and is mostly used by in-circuit
emulators (hence the name GDB uses).
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/