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llvm-project/lld/test/ELF/linkerscript/symbol-only-flags.test

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[ELF] - Do not set output section flags except SHF_{ALLOC,WRITE,EXECINSTR}. This is PR34546. Currently LLD creates output sections even if it has no input sections, but its command contains an assignment. Committed code just assigns the same flag that was used in previous live section. That does not work sometimes. For example if we have following script: .ARM.exidx : { *(.ARM.exidx*) } .foo : { _foo = 0; } } Then first section has SHF_LINK_ORDER flag. But section foo should not. That was a reason of crash in OutputSection::finalize(). LLD tried to calculate Link value, calling front() on empty input sections list. We should only keep access flags and omit all others when creating such sections. Patch fixes the crash observed. Differential revision: https://reviews.llvm.org/D37736 llvm-svn: 315441
2017-10-11 16:13:40 +08:00
# REQUIRES: x86
[ELF] - Represent tests as linker scripts instead of asm. This follows recently started direction and sometimes allows to fully get rid from `echo` calls. I'll rename changed files to *.test in a follow-up. llvm-svn: 327410
2018-03-13 23:47:14 +08:00
# RUN: echo '.section .tbss,"awT",@nobits; .quad 0' \
# RUN: | llvm-mc -filetype=obj -triple=x86_64-unknown-linux - -o %t.o
# RUN: ld.lld -o %t --script %s %t.o
[test] Change llvm-readobj -long-option to --long-option or well-known short options. NFC Also change some options that have different semantics (cause confusion) in llvm-readelf mode: -s => -S -t => --symbols -sd => --section-data llvm-svn: 359651
2019-05-01 13:49:01 +08:00
# RUN: llvm-readobj -S %t | FileCheck %s
[ELF] - Do not set output section flags except SHF_{ALLOC,WRITE,EXECINSTR}. This is PR34546. Currently LLD creates output sections even if it has no input sections, but its command contains an assignment. Committed code just assigns the same flag that was used in previous live section. That does not work sometimes. For example if we have following script: .ARM.exidx : { *(.ARM.exidx*) } .foo : { _foo = 0; } } Then first section has SHF_LINK_ORDER flag. But section foo should not. That was a reason of crash in OutputSection::finalize(). LLD tried to calculate Link value, calling front() on empty input sections list. We should only keep access flags and omit all others when creating such sections. Patch fixes the crash observed. Differential revision: https://reviews.llvm.org/D37736 llvm-svn: 315441
2017-10-11 16:13:40 +08:00
[ELF] - Represent tests as linker scripts instead of asm. This follows recently started direction and sometimes allows to fully get rid from `echo` calls. I'll rename changed files to *.test in a follow-up. llvm-svn: 327410
2018-03-13 23:47:14 +08:00
SECTIONS {
. = SIZEOF_HEADERS;
.tbss : { *(.tbss) }
.foo : { bar = .; }
}
[ELF] - Do not set output section flags except SHF_{ALLOC,WRITE,EXECINSTR}. This is PR34546. Currently LLD creates output sections even if it has no input sections, but its command contains an assignment. Committed code just assigns the same flag that was used in previous live section. That does not work sometimes. For example if we have following script: .ARM.exidx : { *(.ARM.exidx*) } .foo : { _foo = 0; } } Then first section has SHF_LINK_ORDER flag. But section foo should not. That was a reason of crash in OutputSection::finalize(). LLD tried to calculate Link value, calling front() on empty input sections list. We should only keep access flags and omit all others when creating such sections. Patch fixes the crash observed. Differential revision: https://reviews.llvm.org/D37736 llvm-svn: 315441
2017-10-11 16:13:40 +08:00
## Check .foo does not get SHF_TLS flag.
# CHECK: Section {
# CHECK: Index:
# CHECK: Name: .foo
[ELF] Change default output section type to SHT_PROGBITS This fixes an issue where a symbol only section at the start of a PT_LOAD segment, causes incorrect alignment of the file offset for the start of the segment which results in the output of an invalid ELF. SHT_PROGBITS was the default output section type in the past. Differential Revision: https://reviews.llvm.org/D60131 llvm-svn: 358981
2019-04-23 20:38:52 +08:00
# CHECK-NEXT: Type: SHT_PROGBITS
[ELF] - Do not set output section flags except SHF_{ALLOC,WRITE,EXECINSTR}. This is PR34546. Currently LLD creates output sections even if it has no input sections, but its command contains an assignment. Committed code just assigns the same flag that was used in previous live section. That does not work sometimes. For example if we have following script: .ARM.exidx : { *(.ARM.exidx*) } .foo : { _foo = 0; } } Then first section has SHF_LINK_ORDER flag. But section foo should not. That was a reason of crash in OutputSection::finalize(). LLD tried to calculate Link value, calling front() on empty input sections list. We should only keep access flags and omit all others when creating such sections. Patch fixes the crash observed. Differential revision: https://reviews.llvm.org/D37736 llvm-svn: 315441
2017-10-11 16:13:40 +08:00
# CHECK-NEXT: Flags [
# CHECK-NEXT: SHF_ALLOC
# CHECK-NEXT: SHF_WRITE
# CHECK-NEXT: ]