49 lines
1.5 KiB
ArmAsm
49 lines
1.5 KiB
ArmAsm
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// RUN: llvm-mc -triple aarch64-none-linux-gnu -filetype=obj %s -o %t
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// RUN: llvm-objdump -s %t | FileCheck %s
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.text
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.globl foo
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.type foo,@function
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foo:
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.cfi_startproc
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ret
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.cfi_endproc
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// The really key points we're checking here are:
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// * Return register is x30.
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// * Pointer format is 0x1b (GNU doesn't appear to understand others).
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// The rest is largely incidental, but not expected to change regularly.
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// Output is:
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// CHECK: Contents of section .eh_frame:
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// CHECK-NEXT: 0000 10000000 00000000 017a5200 017c1e01 .........zR..|..
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// CHECK-NEXT: 0010 1b0c1f00 10000000 18000000 00000000 ................
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// Won't check the rest, it's rather incidental.
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// 0020 04000000 00000000 ........
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// The first CIE:
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// -------------------
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// 10000000: length of first CIE = 0x10
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// 00000000: This is a CIE
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// 03: version = 0x3
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// 7a 52 00: augmentation string "zR" -- pointer format is specified
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// 01: code alignment factor 1
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// 7c: data alignment factor -4
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// 1e: return address register 30 (== x30).
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// 01: 1 byte of augmentation
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// 1b: pointer format 1b: DW_EH_PE_pcrel | DW_EH_PE_sdata4
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// 0c 1f 00: initial instructions: "DW_CFA_def_cfa x31 ofs 0" in this case
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// Next the FDE:
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// -------------
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// 10000000: FDE length 0x10
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// 18000000: Uses CIE 0x18 backwards (only coincidentally same as above)
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// 00000000: PC begin for this FDE is at 00000000 (relocation is applied here)
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// 04000000: FDE applies up to PC begin+0x14
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// 00: Augmentation string length 0 for this FDE
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