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fdfda04ad5
https://bugs.llvm.org/show_bug.cgi?id=44775 This rule has been implemented by GNU as https://sourceware.org/ml/binutils/2020-02/msg00028.html (binutils >= 2.35) It allows us to simplify ``` .section .foo,"o",foo,unique,0 .section .foo,"o",bar,unique,1 # different section ``` to ``` .section .foo,"o",foo .section .foo,"o",bar # different section ``` We consider the two `.foo` different even if the linked-to symbols foo and bar are defined in the same section. This is a deliberate choice so that we don't need to know the section where foo and bar are defined beforehand. Differential Revision: https://reviews.llvm.org/D74006
49 lines
1.3 KiB
ArmAsm
49 lines
1.3 KiB
ArmAsm
## Sections are differentiated by the quadruple
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## (section_name, group_name, unique_id, link_to_symbol_name).
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## Sections sharing the same quadruple are combined into one section.
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# RUN: llvm-mc -filetype=obj -triple=x86_64 %s -o %t
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# RUN: llvm-readelf -x .foo %t | FileCheck %s
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# CHECK: Hex dump of section '.foo':
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# CHECK-NEXT: 0x00000000 00
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# CHECK: Hex dump of section '.foo':
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# CHECK-NEXT: 0x00000000 0102
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# CHECK: Hex dump of section '.foo':
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# CHECK-NEXT: 0x00000000 03
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# CHECK: Hex dump of section '.foo':
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# CHECK-NEXT: 0x00000000 0405
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# CHECK: Hex dump of section '.foo':
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# CHECK-NEXT: 0x00000000 06
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# CHECK: Hex dump of section '.foo':
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# CHECK-NEXT: 0x00000000 0708
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foo:
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bar:
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## foo and bar are in the same section. However, a section referencing foo
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## is considered different from a section referencing bar.
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.section .foo,"o",@progbits,foo
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.byte 0
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.section .foo,"o",@progbits,bar
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.byte 1
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.section .foo,"o",@progbits,bar
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.byte 2
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.section .foo,"o",@progbits,bar,unique,0
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.byte 3
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.section .foo,"o",@progbits,bar,unique,1
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.byte 4
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.section .foo,"o",@progbits,bar,unique,1
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.byte 5
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.section .foo,"Go",@progbits,comdat0,comdat,bar,unique,1
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.byte 6
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.section .foo,"Go",@progbits,comdat1,comdat,bar,unique,1
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.byte 7
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.section .foo,"Go",@progbits,comdat1,comdat,bar,unique,1
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.byte 8
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