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perf unwind-libunwind: Fix base address for .eh_frame

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[ Upstream commit 4fb54994b2360ab5029ee3a959161f6fe6bbb349 ]

The base address of a DSO mapping should start at the start of the file.
Usually DSOs are mapped from the pgoff 0 so it doesn't matter when it
uses the start of the map address.

But generated DSOs for JIT codes doesn't start from the 0 so it should
subtract the offset to calculate the .eh_frame table offsets correctly.

Fixes: dc2cf4ca86 ("perf unwind: Fix segbase for ld.lld linked objects")
Reviewed-by: Ian Rogers <irogers@google.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Fangrui Song <maskray@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Milian Wolff <milian.wolff@kdab.com>
Cc: Pablo Galindo <pablogsal@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20231212070547.612536-4-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Namhyung Kim
2024-05-08 14:00:55 -07:00
committed by Greg Kroah-Hartman
parent 2f5e8322cd
commit cf731a5dce
1 changed files with 1 additions and 1 deletions
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2
tools/perf/util/unwind-libunwind-local.c
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@@ -327,7 +327,7 @@ static int read_unwind_spec_eh_frame(struct dso *dso, struct unwind_info *ui,
maps__for_each_entry(ui->thread->maps, map) {
if (map->dso == dso && map->start < base_addr)
base_addr = map->start;
base_addr = map->start - map->pgoff;
}
base_addr -= dso->data.elf_base_addr;
/* Address of .eh_frame_hdr */