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| author | Varun R Mallya <varunrmallya@gmail.com> | 2026-06-02 23:58:46 +0300 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2026-06-06 01:26:18 +0300 |
| commit | 557d0cc3f2520feba45360beeafb93203b3230e0 (patch) | |
| tree | 4369cded9381a48947d7a4400f4f4ee9f19c4358 | |
| parent | a1f1acf6a1491394d57e9635e47ccfcf8381f265 (diff) | |
| download | linux-557d0cc3f2520feba45360beeafb93203b3230e0.tar.xz | |
selftests/bpf: use host CPU features in JIT disassembler
Pass the host CPU name and feature string to
LLVMCreateDisasmCPUFeatures() instead of using LLVMCreateDisasm(), so
the disassembler correctly decodes CPU-specific instructions and
extensions such as RISC-V compressed and vector instructions.
Signed-off-by: Varun R Mallya <varunrmallya@gmail.com>
Reviewed-by: Björn Töpel <bjorn@kernel.org>
Link: https://lore.kernel.org/r/20260602205847.102825-2-varunrmallya@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
| -rw-r--r-- | tools/testing/selftests/bpf/jit_disasm_helpers.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/tools/testing/selftests/bpf/jit_disasm_helpers.c b/tools/testing/selftests/bpf/jit_disasm_helpers.c index 364c557c5115..3558fe10e28c 100644 --- a/tools/testing/selftests/bpf/jit_disasm_helpers.c +++ b/tools/testing/selftests/bpf/jit_disasm_helpers.c @@ -96,10 +96,19 @@ static int disasm_one_func(FILE *text_out, uint8_t *image, __u32 len) __u32 *label_pc, pc; int i, cnt, err = 0; char buf[64]; + char *cpu, *features; triple = LLVMGetDefaultTargetTriple(); - ctx = LLVMCreateDisasm(triple, &labels, 0, NULL, lookup_symbol); - if (!ASSERT_OK_PTR(ctx, "LLVMCreateDisasm")) { + + cpu = LLVMGetHostCPUName(); + features = LLVMGetHostCPUFeatures(); + + ctx = LLVMCreateDisasmCPUFeatures(triple, cpu, features, &labels, 0, NULL, lookup_symbol); + + LLVMDisposeMessage(cpu); + LLVMDisposeMessage(features); + + if (!ASSERT_OK_PTR(ctx, "LLVMCreateDisasmCPUFeatures")) { err = -EINVAL; goto out; } |