f22ec9ddf6
This is PR34886. SUBALIGN command currently triggers failture if result expression is zero. Patch fixes the issue, treating zero as 1, what is consistent with other places and ELF spec it seems. Patch also adds "is power of 2" check for this and other expressions returning alignment. Differential revision: https://reviews.llvm.org/D38846 llvm-svn: 316580
61 lines
2.2 KiB
ArmAsm
61 lines
2.2 KiB
ArmAsm
# REQUIRES: x86
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# RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %s -o %t1.o
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# RUN: echo "SECTIONS { .aaa : { *(.aaa.*) } }" > %t1.script
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# RUN: ld.lld -o %t1 --script %t1.script %t1.o
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# RUN: llvm-objdump -s %t1 | FileCheck -check-prefix=NOALIGN %s
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# NOALIGN: Contents of section .aaa:
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# NOALIGN-NEXT: 01000000 00000000 00000000 00000000
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# NOALIGN-NEXT: 00000000 00000000 00000000 00000000
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# NOALIGN-NEXT: 02000000 00000000 00000000 00000000
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# NOALIGN-NEXT: 00000000 00000000 00000000 00000000
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# NOALIGN-NEXT: 03000000 00000000 00000000 00000000
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# NOALIGN-NEXT: 00000000 00000000 00000000 00000000
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# NOALIGN-NEXT: 00000000 00000000 00000000 00000000
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# NOALIGN-NEXT: 00000000 00000000 00000000 00000000
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# NOALIGN-NEXT: 04000000 00000000
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# RUN: echo "SECTIONS { .aaa : SUBALIGN(1) { *(.aaa.*) } }" > %t2.script
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# RUN: ld.lld -o %t2 --script %t2.script %t1.o
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# RUN: llvm-objdump -s %t2 | FileCheck -check-prefix=SUBALIGN %s
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# SUBALIGN: Contents of section .aaa:
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# SUBALIGN: 01000000 00000000 02000000 00000000
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# SUBALIGN: 03000000 00000000 04000000 00000000
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## Test we do not assert or crash when dot(.) is used inside SUBALIGN.
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## ld.bfd does not allow to use dot in such expressions, our behavior is
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## different for simplicity of implementation. Value of dot is undefined.
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# RUN: echo "SECTIONS { . = 0x32; .aaa : SUBALIGN(.) { *(.aaa*) } }" > %t3.script
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# RUN: ld.lld %t1.o --script %t3.script -o %t3
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# RUN: llvm-objdump -s %t3 > /dev/null
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## Test we are able to link with zero alignment, this is consistent with bfd 2.26.1.
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# RUN: echo "SECTIONS { .aaa : SUBALIGN(0) { *(.aaa*) } }" > %t4.script
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# RUN: ld.lld %t1.o --script %t4.script -o %t4
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# RUN: llvm-objdump -s %t4 | FileCheck -check-prefix=SUBALIGN %s
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## Test we fail gracefuly when alignment value is not a power of 2.
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# RUN: echo "SECTIONS { .aaa : SUBALIGN(3) { *(.aaa*) } }" > %t5.script
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# RUN: not ld.lld %t1.o --script %t5.script -o %t5 2>&1 | FileCheck -check-prefix=ERR %s
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# ERR: {{.*}}.script:1: alignment must be power of 2
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.global _start
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_start:
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nop
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.section .aaa.1, "a"
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.align 16
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.quad 1
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.section .aaa.2, "a"
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.align 32
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.quad 2
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.section .aaa.3, "a"
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.align 64
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.quad 3
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.section .aaa.4, "a"
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.align 128
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.quad 4
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