1e30f07ce7
to separate commons based on file name patterns. The following linker script
construct does not work because commons are allocated before section placement
is done and the only synthesized BssSection that holds all commons has no file
associated with it:
SECTIONS { .common_0 : { *file0.o(COMMON) }}
This patch changes the allocation of commons to create a section per common
symbol and let the section logic do the layout.
Differential revision: https://reviews.llvm.org/D37489
llvm-svn: 312796
106 lines
3.2 KiB
ArmAsm
106 lines
3.2 KiB
ArmAsm
# REQUIRES: x86
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# RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %s -o %tfile0.o
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# RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %p/Inputs/common-filespec1.s -o %tfile1.o
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# RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %p/Inputs/common-filespec2.s -o %tfile2.o
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# RUN: echo "SECTIONS { .common_0 : { *file0.o(COMMON) } .common_1 : { *file1.o(COMMON) } .common_2 : { *file2.o(COMMON) } }" > %t.script
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# RUN: ld.lld -o %t1 --script %t.script %tfile0.o %tfile1.o %tfile2.o
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# RUN: llvm-readobj -s -t %t1 | FileCheck %s
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# Make sure all 3 sections are allocated and they have sizes and alignments
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# corresponding to the commons assigned to them
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# CHECK: Section {
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# CHECK: Index:
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# CHECK: Name: .common_0
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# CHECK-NEXT: Type: SHT_NOBITS
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# CHECK-NEXT: Flags [
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# CHECK-NEXT: SHF_ALLOC
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# CHECK-NEXT: SHF_WRITE
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# CHECK-NEXT: ]
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# CHECK-NEXT: Address: 0x4
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# CHECK-NEXT: Offset: 0x
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# CHECK-NEXT: Size: 4
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# CHECK-NEXT: Link: 0
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# CHECK-NEXT: Info: 0
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# CHECK-NEXT: AddressAlignment: 4
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# CHECK-NEXT: EntrySize: 0
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# CHECK-NEXT: }
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# CHECK: Section {
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# CHECK: Index:
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# CHECK: Name: .common_1
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# CHECK-NEXT: Type: SHT_NOBITS
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# CHECK-NEXT: Flags [
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# CHECK-NEXT: SHF_ALLOC
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# CHECK-NEXT: SHF_WRITE
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# CHECK-NEXT: ]
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# CHECK-NEXT: Address: 0x8
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# CHECK-NEXT: Offset: 0x
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# CHECK-NEXT: Size: 8
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# CHECK-NEXT: Link: 0
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# CHECK-NEXT: Info: 0
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# CHECK-NEXT: AddressAlignment: 8
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# CHECK-NEXT: EntrySize: 0
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# CHECK-NEXT: }
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# CHECK: Section {
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# CHECK: Index:
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# CHECK: Name: .common_2
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# CHECK-NEXT: Type: SHT_NOBITS
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# CHECK-NEXT: Flags [
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# CHECK-NEXT: SHF_ALLOC
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# CHECK-NEXT: SHF_WRITE
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# CHECK-NEXT: ]
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# CHECK-NEXT: Address: 0x10
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# CHECK-NEXT: Offset: 0x
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# CHECK-NEXT: Size: 48
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# CHECK-NEXT: Link: 0
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# CHECK-NEXT: Info: 0
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# CHECK-NEXT: AddressAlignment: 16
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# CHECK-NEXT: EntrySize: 0
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# CHECK-NEXT: }
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# Commons with unique name in each file must be assigned to that file's section.
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# For a common with multiple definitions, the largest one wins and it must be
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# assigned to the section from the file which provided the winning def
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# CHECK: Symbol {
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# CHECK: Name: common_multiple
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# CHECK-NEXT: Value: 0x10
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# CHECK-NEXT: Size: 32
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# CHECK-NEXT: Binding: Global
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# CHECK-NEXT: Type: Object
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# CHECK-NEXT: Other: 0
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# CHECK-NEXT: Section: .common_2
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# CHECK-NEXT: }
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# CHECK: Symbol {
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# CHECK: Name: common_uniq_0
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# CHECK-NEXT: Value: 0x4
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# CHECK-NEXT: Size: 4
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# CHECK-NEXT: Binding: Global
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# CHECK-NEXT: Type: Object
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# CHECK-NEXT: Other: 0
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# CHECK-NEXT: Section: .common_0
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# CHECK-NEXT: }
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# CHECK: Symbol {
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# CHECK: Name: common_uniq_1
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# CHECK-NEXT: Value: 0x8
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# CHECK-NEXT: Size: 8
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# CHECK-NEXT: Binding: Global
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# CHECK-NEXT: Type: Object
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# CHECK-NEXT: Other: 0
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# CHECK-NEXT: Section: .common_1
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# CHECK-NEXT: }
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# CHECK: Symbol {
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# CHECK: Name: common_uniq_2
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# CHECK-NEXT: Value: 0x30
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# CHECK-NEXT: Size: 16
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# CHECK-NEXT: Binding: Global
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# CHECK-NEXT: Type: Object
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# CHECK-NEXT: Other: 0
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# CHECK-NEXT: Section: .common_2
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# CHECK-NEXT: }
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.globl _start
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_start:
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jmp _start
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.comm common_uniq_0,4,4
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.comm common_multiple,8,8
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