mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-13 20:32:21 +00:00
bb804ee909
Currently, llvm always emits a DWARF CIE with a version of 1, even when emitting DWARF 3 or 4, which both support CIE version 3. This patch makes it emit the newer CIE version when we are emitting DWARF 3 or 4. This will not reduce compatibility, as we already emit other DWARF3/4 features, and is worth doing as the DWARF3 spec removed some ambiguities in the interpretation of call frame information. It also fixes a minor bug where the "return address" field of the CIE was encoded as a ULEB128, which is only valid when the CIE version is 3. There are no test changes for this, because (as far as I can tell) none of the platforms that we test have a return address register with a DWARF register number >127. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211272 91177308-0d34-0410-b5e6-96231b3b80d8
55 lines
1.5 KiB
ArmAsm
55 lines
1.5 KiB
ArmAsm
# RUN: llvm-mc -triple=s390x-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 check_largest_class
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.align 4
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.type check_largest_class,@function
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check_largest_class:
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.cfi_startproc
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stmg %r13, %r15, 104(%r15)
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.cfi_offset %r13, -56
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.cfi_offset %r14, -48
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.cfi_offset %r15, -40
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aghi %r15, -160
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.cfi_def_cfa_offset 320
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lmg %r13, %r15, 264(%r15)
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br %r14
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.size check_largest_class, .-check_largest_class
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.cfi_endproc
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# The readelf rendering is:
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#
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# Contents of the .eh_frame section:
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#
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# 00000000 0000001c 00000000 CIE
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# Version: 3
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# Augmentation: "zR"
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# Code alignment factor: 1
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# Data alignment factor: -8
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# Return address column: 14
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# Augmentation data: 1b
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#
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# DW_CFA_def_cfa: r15 ofs 160
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# DW_CFA_nop
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# DW_CFA_nop
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# DW_CFA_nop
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#
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# 00000020 0000001c 00000024 FDE cie=00000000 pc=00000000..00000012
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# DW_CFA_advance_loc: 6 to 00000006
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# DW_CFA_offset: r13 at cfa-56
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# DW_CFA_offset: r14 at cfa-48
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# DW_CFA_offset: r15 at cfa-40
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# DW_CFA_advance_loc: 4 to 0000000a
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# DW_CFA_def_cfa_offset: 320
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# DW_CFA_nop
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# DW_CFA_nop
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# DW_CFA_nop
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# DW_CFA_nop
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#
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# CHECK: Contents of section .eh_frame:
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# CHECK-NEXT: 0000 00000014 00000000 037a5200 01780e01 .........zR..x..
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# CHECK-NEXT: 0010 1b0c0fa0 01000000 0000001c 0000001c ................
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# CHECK-NEXT: 0020 00000000 00000012 00468d07 8e068f05 .........F......
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# CHECK-NEXT: 0030 440ec002 00000000 D.......
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