tree 5521044b60ef2c39477c85614c254a4386ff9270
parent e67d47631fce2fe9b07fbfb43c75512a5844c139
author Nicholas Piggin <npiggin@gmail.com> 1712306111 +1000
committer Thomas Huth <thuth@redhat.com> 1713254310 +0200

powerpc: interrupt stack backtracing

Add support for backtracing across interrupt stacks, and add
interrupt frame backtrace for unhandled interrupts.

This requires a back-chain created from initial interrupt stack
frame to the r1 value of the interrupted context. A label is
added at the return location of the exception handler call, so
the unwinder can recognize the initial interrupt frame.

The additional cstart entry-frame is no longer required because
the unwinder now looks for frame == 0 as well as address == 0.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Message-ID: <20240405083539.374995-11-npiggin@gmail.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>