51268a57fd
Preserve nop instructions in the Linux kernel since they could be used for runtime patching.
163 lines
3.6 KiB
ArmAsm
163 lines
3.6 KiB
ArmAsm
# REQUIRES: system-linux
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## Check that BOLT correctly updates ORC unwind information used by the Linux
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## kernel.
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# RUN: llvm-mc -filetype=obj -triple x86_64-unknown-unknown %s -o %t.o
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# RUN: %clang %cflags -nostdlib %t.o -o %t.exe \
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# RUN: -Wl,--image-base=0xffffffff80000000,--no-dynamic-linker,--no-eh-frame-hdr
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## Verify reading contents of ORC sections.
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# RUN: llvm-bolt %t.exe --dump-orc -o /dev/null |& FileCheck %s \
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# RUN: --check-prefix=CHECK-ORC
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# CHECK-ORC: BOLT-INFO: ORC unwind information:
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# CHECK-ORC-NEXT: {sp: 8, bp: 0, info: 0x5}: _start
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# CHECK-ORC-NEXT: {terminator}
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# CHECK-ORC-NEXT: {sp: 8, bp: 0, info: 0x5}: foo
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# CHECK-ORC-NEXT: {sp: 16, bp: -16, info: 0x15}: foo
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# CHECK-ORC-NEXT: {sp: 16, bp: -16, info: 0x14}: foo
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# CHECK-ORC-NEXT: {sp: 8, bp: 0, info: 0x5}: foo
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# CHECK-ORC-NEXT: {terminator}
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# CHECK-ORC-NEXT: {terminator}
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# CHECK-ORC-NEXT: {terminator}
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## Verify ORC bindings to instructions.
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# RUN: llvm-bolt %t.exe --print-normalized --dump-orc --print-orc -o %t.out \
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# RUN: --keep-nops=0 --bolt-info=0 |& FileCheck %s
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## Verify ORC bindings after rewrite.
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# RUN: llvm-bolt %t.out -o %t.out.1 --print-normalized --print-orc \
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# RUN: |& FileCheck %s
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## Verify ORC binding after rewrite when some of the functions are skipped.
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# RUN: llvm-bolt %t.exe -o %t.out --skip-funcs=bar --bolt-info=0 --keep-nops=0
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# RUN: llvm-bolt %t.out -o %t.out.1 --print-normalized --print-orc \
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# RUN: |& FileCheck %s
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# CHECK: BOLT-INFO: Linux kernel binary detected
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# CHECK: BOLT-INFO: parsed 9 ORC entries
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.text
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.globl _start
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.type _start, %function
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_start:
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# CHECK: Binary Function "_start"
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call foo
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# CHECK: callq foo # ORC: {sp: 8, bp: 0, info: 0x5}
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ret
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.size _start, .-_start
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.globl foo
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.type foo, %function
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foo:
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# CHECK: Binary Function "foo"
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push %rbp
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# CHECK: pushq %rbp # ORC: {sp: 8, bp: 0, info: 0x5}
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.L1:
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mov %rsp, %rbp
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# CHECK: movq %rsp, %rbp # ORC: {sp: 16, bp: -16, info: 0x15}
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.L2:
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pop %rbp
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# CHECK: popq %rbp # ORC: {sp: 16, bp: -16, info: 0x14}
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nop
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.L3:
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ret
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# CHECK: retq # ORC: {sp: 8, bp: 0, info: 0x5}
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.size foo, .-foo
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.globl bar
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.type bar, %function
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bar:
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# CHECK: Binary Function "bar"
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ret
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## Same ORC info propagated from foo above.
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# CHECK: retq # ORC: {sp: 8, bp: 0, info: 0x5}
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.L4:
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.size bar, .-bar
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# CHECK: BOLT-WARNING: Linux kernel support is experimental
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.section .orc_unwind,"a",@progbits
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.align 4
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.section .orc_unwind_ip,"a",@progbits
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.align 4
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## ORC for _start.
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.section .orc_unwind
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.2byte 8
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.2byte 0
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.2byte 5
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.section .orc_unwind_ip
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.long _start - .
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.section .orc_unwind
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.2byte 0
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.2byte 0
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.2byte 0
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.section .orc_unwind_ip
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.long foo - .
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## ORC for foo.
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.section .orc_unwind
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.2byte 8
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.2byte 0
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.2byte 5
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.section .orc_unwind_ip
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.long foo - .
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.section .orc_unwind
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.2byte 16
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.2byte -16
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.2byte 21
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.section .orc_unwind_ip
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.long .L1 - .
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.section .orc_unwind
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.2byte 16
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.2byte -16
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.2byte 20
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.section .orc_unwind_ip
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.long .L2 - .
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.section .orc_unwind
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.2byte 8
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.2byte 0
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.2byte 5
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.section .orc_unwind_ip
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.long .L3 - .
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.section .orc_unwind
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.2byte 0
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.2byte 0
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.2byte 0
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.section .orc_unwind_ip
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.long .L4 - .
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## Duplicate terminator entries to test ORC reader.
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.section .orc_unwind
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.2byte 0
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.2byte 0
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.2byte 0
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.section .orc_unwind_ip
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.long .L4 - .
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.section .orc_unwind
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.2byte 0
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.2byte 0
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.2byte 0
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.section .orc_unwind_ip
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.long .L4 - .
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## Fake Linux Kernel sections.
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.section __ksymtab,"a",@progbits
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.section __ksymtab_gpl,"a",@progbits
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