e40a5cd3ec
Summary: Fix the stack tracing for dtrace/powerpc by using the trapexit/asttrapexit return address sentinels instead of checking within the kernel address space. As part of this, I had to add new inline functions. FBT traces the kernel, so we have to have special case handling for this, since a trap will create a full new trap frame, and there's no way to pass around the 'real' stack. I handle this by special-casing 'aframes == 0' with the trap frame. If aframes counts out to the trap frame, then assume we're looking for the full kernel trap frame, so switch to the real stack pointer. Test Plan: Tested on powerpc64 Reviewers: rpaulo, markj, nwhitehorn Reviewed By: markj, nwhitehorn Differential Revision: https://reviews.freebsd.org/D788 MFC after: 3 week Relnotes: Yes |
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| compat/opensolaris | ||
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| dev | ||