[PATCH v5 1/3] scripts/faddr2line: Don't filter out non-function symbols from readelf

From: Will Deacon
Date: Mon Oct 02 2023 - 12:58:05 EST


As Josh points out in 20230724234734.zy67gm674vl3p3wv@treble:

> Problem is, I think the kernel's symbol printing code prints the
> nearest kallsyms symbol, and there are some valid non-FUNC code
> symbols. For example, syscall_return_via_sysret.

so we shouldn't be considering only 'FUNC'-type symbols in the output
from readelf.

Drop the function symbol type filtering from the faddr2line outer loop.

Cc: John Stultz <jstultz@xxxxxxxxxx>
Suggested-by: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
Reviewed-by: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20230724234734.zy67gm674vl3p3wv@treble
Signed-off-by: Will Deacon <will@xxxxxxxxxx>
---
scripts/faddr2line | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/faddr2line b/scripts/faddr2line
index 0e73aca4f908..a35a420d0f26 100755
--- a/scripts/faddr2line
+++ b/scripts/faddr2line
@@ -260,7 +260,7 @@ __faddr2line() {

DONE=1

- done < <(${READELF} --symbols --wide $objfile | sed 's/\[.*\]//' | ${AWK} -v fn=$sym_name '$4 == "FUNC" && $8 == fn')
+ done < <(${READELF} --symbols --wide $objfile | sed 's/\[.*\]//' | ${AWK} -v fn=$sym_name '$8 == fn')
}

[[ $# -lt 2 ]] && usage
--
2.42.0.582.g8ccd20d70d-goog