forked from OSchip/llvm-project
100 lines
3.2 KiB
ArmAsm
100 lines
3.2 KiB
ArmAsm
// REQUIRES: arm
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// RUN: llvm-mc -filetype=obj --arm-add-build-attributes -triple=armv7a-none-linux-gnueabi %s -o %t
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// RUN: ld.lld %t -o %t2
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// RUN: llvm-objdump -d --triple=armv7a-none-linux-gnueabi --no-show-raw-insn %t2 | FileCheck %s
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// RUN: llvm-objdump -s --triple=armv7a-none-linux-gnueabi %t2 | FileCheck --check-prefix=CHECK-EXIDX %s
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// RUN: llvm-readobj --program-headers --sections %t2 | FileCheck -check-prefix=CHECK-PT %s
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// Test that inline unwinding table entries and references to .ARM.extab
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// entries survive the re-ordering of the .ARM.exidx section
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.syntax unified
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// Will produce an ARM.exidx entry with inline unwinding instructions
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.section .text.func1, "ax",%progbits
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.global func1
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func1:
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.fnstart
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bx lr
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.save {r7, lr}
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.setfp r7, sp, #0
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.fnend
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// Unwinding instructions for .text2 too large for an inline entry ARM.exidx
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// entry. A separate .ARM.extab section is created to hold the unwind entries
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// The .ARM.exidx table entry has a reference to the .ARM.extab section.
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.section .text.func2, "ax",%progbits
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.global func2
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func2:
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.fnstart
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bx lr
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.personality __gxx_personality_v0
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.handlerdata
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.long 0
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.section .text.func2
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.fnend
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// Dummy implementation of personality routines to satisfy reference from
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// exception tables
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.section .text.__gcc_personality_v0, "ax", %progbits
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.global __gxx_personality_v0
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__gxx_personality_v0:
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bx lr
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.section .text.__aeabi_unwind_cpp_pr0, "ax", %progbits
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.global __aeabi_unwind_cpp_pr0
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__aeabi_unwind_cpp_pr0:
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bx lr
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.text
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.global _start
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_start:
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bl func1
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bl func2
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bx lr
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// CHECK: Disassembly of section .text:
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// CHECK-EMPTY:
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// CHECK-NEXT: <_start>:
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// CHECK-NEXT: 20108: bl #4 <func1>
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// CHECK-NEXT: bl #4 <func2>
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// CHECK-NEXT: bx lr
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// CHECK: <func1>:
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// CHECK-NEXT: 20114: bx lr
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// CHECK: <func2>:
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// CHECK-NEXT: 20118: bx lr
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// CHECK: <__gxx_personality_v0>:
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// CHECK-NEXT: 2011c: bx lr
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// CHECK: <__aeabi_unwind_cpp_pr0>:
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// CHECK-NEXT: 20120: bx lr
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/// 100d4 + 0x10034 = 0x20108 = main (linker generated cantunwind)
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/// 100dc + 0x10038 = 0x20114 = func1 (inline unwinding data)
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// CHECK-EXIDX: 100d4 34000100 01000000 38000100 08849780
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/// 100e4 + 0x10034 = 0x20118 = func2 (100e8 + 14 = 100fc = .ARM.extab entry)
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/// 100ec + 0x10030 = 0x2011c = __gxx_personality_v0 (linker generated cantunwind)
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// CHECK-EXIDX-NEXT: 100e4 34000100 14000000 30000100 01000000
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/// 100f4 + 0x10030 = 1101c = sentinel
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// CHECK-EXIDX-NEXT: 100f4 30000100 01000000
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// CHECK-PT: Name: .ARM.exidx
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// CHECK-PT-NEXT: Type: SHT_ARM_EXIDX (0x70000001)
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// CHECK-PT-NEXT: Flags [
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// CHECK-PT-NEXT: SHF_ALLOC
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// CHECK-PT-NEXT: SHF_LINK_ORDER
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// CHECK-PT-NEXT: ]
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// CHECK-PT-NEXT: Address: 0x100D4
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// CHECK-PT-NEXT: Offset: 0xD4
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// CHECK-PT-NEXT: Size: 40
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// CHECK-PT: Type: PT_ARM_EXIDX (0x70000001)
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// CHECK-PT-NEXT: Offset: 0xD4
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// CHECK-PT-NEXT: VirtualAddress: 0x100D4
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// CHECK-PT-NEXT: PhysicalAddress: 0x100D4
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// CHECK-PT-NEXT: FileSize: 40
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// CHECK-PT-NEXT: MemSize: 40
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// CHECK-PT-NEXT: Flags [ (0x4)
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// CHECK-PT-NEXT: PF_R (0x4)
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// CHECK-PT-NEXT: ]
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// CHECK-PT-NEXT: Alignment: 4
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// CHECK-PT-NEXT: }
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