forked from OSchip/llvm-project
34 lines
1.1 KiB
ArmAsm
34 lines
1.1 KiB
ArmAsm
// REQUIRES: arm
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// RUN: llvm-mc -filetype=obj -triple=armv7a-linux-gnueabihf --arm-add-build-attributes %s -o %t.o
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// RUN: ld.lld --fix-cortex-a8 -verbose %t.o -o %t2 2>&1 | FileCheck %s
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// RUN: llvm-objdump -d --no-show-raw-insn --start-address=0x21ffa --stop-address=0x22008 %t2 | FileCheck --check-prefix=CHECK-PATCH %s
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/// Test that the patch can work on an unrelocated BLX. Neither clang or GCC
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/// will emit these without a relocation, but they could be produced by ELF
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/// processing tools.
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// CHECK: ld.lld: detected cortex-a8-657419 erratum sequence starting at 21FFE in unpatched output.
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.syntax unified
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.text
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.type _start, %function
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.balign 4096
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.global _start
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.arm
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_start:
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bx lr
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.space 4086
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.thumb
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/// 32-bit Branch link and exchange spans 2 4KiB regions, preceded by a
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/// 32-bit non branch instruction. Expect a patch.
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nop.w
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/// Encoding for blx _start. Use .inst.n directives to avoid a relocation.
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.inst.n 0xf7ff
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.inst.n 0xe800
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// CHECK-PATCH: 21ffa: nop.w
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// CHECK-PATCH-NEXT: 21ffe: blx #4
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// CHECK-PATCH: 00022004 <__CortexA8657417_21FFE>:
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// CHECK-PATCH-NEXT: 22004: b #-4104
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