diff options
| author | Maksim Panchenko <maks@fb.com> | 2024-06-11 10:52:51 -0700 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2024-06-11 10:52:51 -0700 |
| commit | 540893e43fb7a5e08deec0d951fd3c1d957f8f89 (patch) | |
| tree | 3fa22fc18db248a4eed05b1385146a04893b8f30 /bolt/test | |
| parent | 56f668c12b1a26e103aafe5ac37930b1895c938b (diff) | |
| download | llvm-540893e43fb7a5e08deec0d951fd3c1d957f8f89.zip llvm-540893e43fb7a5e08deec0d951fd3c1d957f8f89.tar.gz llvm-540893e43fb7a5e08deec0d951fd3c1d957f8f89.tar.bz2 | |
[BOLT] Add auto parsing for Linux kernel .altinstructions (#95068)
.altinstructions section contains a list of structures where fields can
have different sizes while other fields could be present or not
depending on the kernel version. Add automatic detection of such
variations and use it by default. The user can still overwrite the
automatic detection with `--alt-inst-has-padlen` and
`--alt-inst-feature-size` options.
Diffstat (limited to 'bolt/test')
| -rw-r--r-- | bolt/test/X86/linux-alt-instruction.s | 20 |
1 files changed, 13 insertions, 7 deletions
diff --git a/bolt/test/X86/linux-alt-instruction.s b/bolt/test/X86/linux-alt-instruction.s index 2cdf315..66cd33a 100644 --- a/bolt/test/X86/linux-alt-instruction.s +++ b/bolt/test/X86/linux-alt-instruction.s @@ -12,24 +12,30 @@ ## Older kernels used to have padlen field in alt_instr. Check compatibility. # RUN: llvm-mc -filetype=obj -triple x86_64-unknown-unknown --defsym PADLEN=1 \ -# RUN: %s -o %t.o -# RUN: %clang %cflags -nostdlib %t.o -o %t.exe \ +# RUN: %s -o %t.padlen.o +# RUN: %clang %cflags -nostdlib %t.padlen.o -o %t.padlen.exe \ # RUN: -Wl,--image-base=0xffffffff80000000,--no-dynamic-linker,--no-eh-frame-hdr,--no-pie -# RUN: llvm-bolt %t.exe --print-normalized --alt-inst-has-padlen -o %t.out \ +# RUN: llvm-bolt %t.padlen.exe --print-normalized --alt-inst-has-padlen -o %t.padlen.out \ # RUN: | FileCheck %s ## Check with a larger size of "feature" field in alt_instr. # RUN: llvm-mc -filetype=obj -triple x86_64-unknown-unknown \ -# RUN: --defsym FEATURE_SIZE_4=1 %s -o %t.o -# RUN: %clang %cflags -nostdlib %t.o -o %t.exe \ +# RUN: --defsym FEATURE_SIZE_4=1 %s -o %t.fs4.o +# RUN: %clang %cflags -nostdlib %t.fs4.o -o %t.fs4.exe \ # RUN: -Wl,--image-base=0xffffffff80000000,--no-dynamic-linker,--no-eh-frame-hdr,--no-pie -# RUN: llvm-bolt %t.exe --print-normalized --alt-inst-feature-size=4 -o %t.out \ +# RUN: llvm-bolt %t.fs4.exe --print-normalized --alt-inst-feature-size=4 -o %t.fs4.out \ # RUN: | FileCheck %s ## Check that out-of-bounds read is handled properly. -# RUN: not llvm-bolt %t.exe --print-normalized --alt-inst-feature-size=2 -o %t.out +# RUN: not llvm-bolt %t.fs4.exe --alt-inst-feature-size=2 -o %t.fs4.out + +## Check that BOLT automatically detects structure fields in .altinstructions. + +# RUN: llvm-bolt %t.exe --print-normalized -o %t.out | FileCheck %s +# RUN: llvm-bolt %t.exe --print-normalized -o %t.padlen.out | FileCheck %s +# RUN: llvm-bolt %t.exe --print-normalized -o %t.fs4.out | FileCheck %s # CHECK: BOLT-INFO: Linux kernel binary detected # CHECK: BOLT-INFO: parsed 2 alternative instruction entries |