On Dec 10, 2009, at 9:57 AM, Dave Kleikamp wrote: > These patches implement an extention to the ptrace interface proposed by > Thiago Bauermann and the the PowerPC gdb team. > > GDB intends to support the following hardware debug features of BookE > processors: > > 4 hardware breakpoints (IAC) > 2 hardware watchpoints (read, write and read-write) (DAC) > 2 value conditions for the hardware watchpoints (DVC) > > For that, we need to extend ptrace so that GDB can query and set these > resources. Since we're extending, we're trying to create an interface > that's extendable and that covers both BookE and server processors, so > that GDB doesn't need to special-case each of them. We propose the > following 3 new ptrace requests described below. > > There have been discussions of a generic hardware debug interface for the > kernel which would hopefully contemplate all the functionality below and > supersede it. But we need something that works now, and which enables GDB > to be simpler and work with both Server and Embedded processors without > special cases.
What do we do in EDM mode? We need a flag somewhere to determine if HW supports conveying DBCR0[EDM] and if it does which of the ptrace calls fails? - k _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
