BAT registers are only used to map large sections of physical memory or I/O space. There are now allocated on a need-be basis (at least some are) are so gdb would not need the current or past values. If gdb needed to access those physical addresses, the kernel wil trap and replace the corresponding BAT register. You can always dump the shadow bat table if you need to debug BATS. -Derek jacereda%gmail.com@localhost wrote:
Hi,
I'm trying to bring back IPKDB support. I have some questions:
- Somewhere in the file is a:
#define ipkdbsave 0xde0 /* primary save area for IPKDB */
...
ipkdbtrap:
FRAME_SETUP(ipkdbsave)
/* Call C trap code: */
...
Shouldn't that be FRAME_SETUP(CI_IPKDBSAVE) ? That define seems obsolete.
- Why aren't things like BAT registers saved in the frame? How is gdb
supossed to get them?
TIA,
Jorge Acereda