GNU utilities cannot necessarily parse objects built by LLVM, which can
result in confusing errors when using 'faddr2line':
$ CROSS_COMPILE=aarch64-linux-gnu- ./scripts/faddr2line vmlinux do_one_initcall+0xf4/0x260
aarch64-linux-gnu-addr2line: vmlinux: unknown type [0x13] section `.relr.dyn'
aarch64-linux-gnu-addr2line: DWARF error: invalid or unhandled FORM value: 0x25
do_one_initcall+0xf4/0x260:
aarch64-linux-gnu-addr2line: vmlinux: unknown type [0x13] section `.relr.dyn'
aarch64-linux-gnu-addr2line: DWARF error: invalid or unhandled FORM value: 0x25
$x.73 at main.c:?
Although this can be worked around by setting CROSS_COMPILE to "llvm=-",
it's cleaner to follow the same syntax as the top-level Makefile and
accept LLVM= as an indication to use the llvm- tools, optionally
specifying their location or specific version number.
Cc: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
Cc: John Stultz <jstultz@xxxxxxxxxx>
Suggested-by: Masahiro Yamada <masahiroy@xxxxxxxxxx>
Signed-off-by: Will Deacon <will@xxxxxxxxxx>
---
scripts/faddr2line | 17 +++++++++++++++--
1 file changed, 15 insertions(+), 2 deletions(-)
diff --git a/scripts/faddr2line b/scripts/faddr2line
index a35a420d0f26..6b8206802157 100755
--- a/scripts/faddr2line
+++ b/scripts/faddr2line
@@ -58,8 +58,21 @@ die() {
exit 1
}
-READELF="${CROSS_COMPILE:-}readelf"
-ADDR2LINE="${CROSS_COMPILE:-}addr2line"
+UTIL_SUFFIX=""
+if [[ "${LLVM:-}" == "" ]]; then
+ UTIL_PREFIX=${CROSS_COMPILE:-}
+else
+ UTIL_PREFIX=llvm-
+
+ if [[ "${LLVM}" == *"/" ]]; then
+ UTIL_PREFIX=${LLVM}${UTIL_PREFIX}
+ elif [[ "${LLVM}" == "-"* ]]; then
+ UTIL_SUFFIX=${LLVM}
+ fi
+fi
+
+READELF="${UTIL_PREFIX}readelf${UTIL_SUFFIX}"
+ADDR2LINE="${UTIL_PREFIX}addr2line${UTIL_SUFFIX}"
AWK="awk"
GREP="grep"
--
2.42.0.283.g2d96d420d3-goog
