From: Andrew Cagney <ac131313@redhat.com>
To: Jim Ingham <jingham@apple.com>
Cc: gdb@sources.redhat.com
Subject: Revamped frame chain, useful for PPC?
Date: Fri, 10 Jan 2003 15:54:00 -0000 [thread overview]
Message-ID: <3E1EECB9.9060900@redhat.com> (raw)
Jim,
Long long ago you mentioned that, to improve performance, you hacked the
PPC code and core GDB so that it could do a light weight frame chain.
That is, instead of a full frame prologue (aka, init frame saved regs /
init extra frame info), it would just chain the frame pointer.
Can I suggest looking at the cagney-unwind-20030108-branch as it
contains the revamped unwind mechanism. In particular, it now leaves it
to the target architecture to determine if/when additional prologue
analysis should be performed.
See the function get_prev_frame() for the unwind sequence, and
sentinel-frame / dummy-frame for specific frame implementations.
Andrew
next reply other threads:[~2003-01-10 15:54 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-01-10 15:54 Andrew Cagney [this message]
2003-01-10 18:20 ` Jim Ingham
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