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Re: x86 hardware breakpoint question
At 15:54 16/11/01 -0500, Christopher Faylor wrote:
>On Fri, Nov 16, 2001 at 06:47:52PM +0200, Eli Zaretskii wrote:
>>> cygwin that completely relies on win32 API calls does not support
>>> hardware breakpoint (nor watchpoints)
>>> because there is no API call to set a hardware trap.
>>I think this is just because no one implemented Cygwin support for the
>>new facilities on i386-nat.c. When this was discussed a few months
>>ago, someone, I think DJ Delorie, posted a list of Win32 API entries
>>that support hardware watchpoints and breakpoints.
>I can't find this, Eli. Can you provide any clues on what to look for?
>I'd like to have hardware brekpoints into cygwin if I can.
I had pseudo-hardware watchpoints working using the page protection
mechanisms available with the VirtualXXX functions.
I am trying to get up to date my old code that added
"hardware" watchpoints with VirtualProtectEx.
As soon as this works correctly again, I will send
a patch, even if my code is far from optimal,
because otherwise it will again get lost in
confilcts with future changes...