Messages in this thread | | | From | Adrian Hunter <> | Subject | [PATCH 0/8] perf tools: kaslr fixes | Date | Fri, 24 Jan 2014 17:10:10 +0200 |
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Hi
Here are some patches that improve perf tools handling of relocation.
This has become an issue as mentioned in this thread:
http://marc.info/?l=linux-kernel&m=139030004314756
It looks like the changes I made to vmlinux and module mapping to allow object code to be read broke the symbol annotation for relocated kernels. The first patch fixes that.
There were some other issues though: - ref_reloc_sym was not always set up - mustn't use kcore if the kernel has moved - kallsyms is not unique for a given buildid
These things need more testing but I thought it was worth getting comments now.
Adrian Hunter (8): perf tools: Fix symbol annotation for relocated kernel perf tools: Add kallsyms__get_function_start() perf tools: Add machine__get_kallsyms_filename() perf tools: Set up ref_reloc_sym in machine__create_kernel_maps() perf report: Get ref_reloc_sym from kernel map perf tools: Prevent the use of kcore if the kernel has moved perf tools: test does not need to set up ref_reloc_sym perf tools: Adjust kallsyms for relocated kernel
tools/perf/builtin-record.c | 10 ++---- tools/perf/tests/vmlinux-kallsyms.c | 10 ------ tools/perf/util/event.c | 36 ++++++++++---------- tools/perf/util/event.h | 6 ++-- tools/perf/util/machine.c | 40 ++++++++++++++++++----- tools/perf/util/map.c | 5 +-- tools/perf/util/map.h | 1 + tools/perf/util/symbol-elf.c | 2 ++ tools/perf/util/symbol.c | 65 +++++++++++++++++++++++++++++++++---- 9 files changed, 120 insertions(+), 55 deletions(-)
Regards Adrian
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