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powerpc64/ftrace: fix OOL stub count with clang

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The total number of out-of-line (OOL) stubs required for function
tracing is determined using the following command:

    $(OBJDUMP) -r -j __patchable_function_entries vmlinux.o

While this works correctly with GNU objdump, llvm-objdump does not
list the expected relocation records for this section. Fix this by
using the -d option and counting R_PPC64_ADDR64 relocation entries.
This works as desired with both objdump and llvm-objdump.

Signed-off-by: Hari Bathini <hbathini@linux.ibm.com>
Tested-by: Venkat Rao Bagalkote <venkat88@linux.ibm.com>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/20260127084926.34497-3-hbathini@linux.ibm.com
This commit is contained in:
Hari Bathini
2026-01-27 14:19:25 +05:30
committed by Madhavan Srinivasan
parent 73cdf24e81
commit 875612a774
1 changed files with 2 additions and 2 deletions
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4
arch/powerpc/tools/ftrace-gen-ool-stubs.sh
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@@ -15,9 +15,9 @@ if [ -z "$is_64bit" ]; then
RELOCATION=R_PPC_ADDR32
fi
num_ool_stubs_total=$($objdump -r -j __patchable_function_entries "$vmlinux_o" |
num_ool_stubs_total=$($objdump -r -j __patchable_function_entries -d "$vmlinux_o" |
grep -c "$RELOCATION")
num_ool_stubs_inittext=$($objdump -r -j __patchable_function_entries "$vmlinux_o" |
num_ool_stubs_inittext=$($objdump -r -j __patchable_function_entries -d "$vmlinux_o" |
grep -e ".init.text" -e ".text.startup" | grep -c "$RELOCATION")
num_ool_stubs_text=$((num_ool_stubs_total - num_ool_stubs_inittext))