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llvm-project/lld/test/ELF/linkerscript/no-space.s

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Error out instead of producing a corrupt PT_LOAD. What bfd and gold do is give up in putting the headers in the PT_LOAD and just start the PT_LOAD in the second page. llvm-svn: 281660
2016-09-16 05:22:11 +08:00
# REQUIRES: x86
# RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t.o
[lld] Mitigate relocation overflow [part 1 of 2]. This CL places .dynsym and .dynstr at the beginning of SHF_ALLOC sections. We do this to mitigate the possibility that huge .dynsym and .dynstr sections placed between ro-data and text sections cause relocation overflow. Differential Revision: https://reviews.llvm.org/D45788 llvm-svn: 332374
2018-05-16 01:02:35 +08:00
# RUN: echo "SECTIONS {foo 0 : {*(foo*)} .dynsym : {*(.dynsym)} .dynstr : {*(.dynstr)} }" > %t.script
[ELF] - Do --hash-style=both by default. Its PR34712, GNU linkers recently changed default values to "both" of "sysv". Patch do the same for all targets except MIPS, where .gnu.hash section is not yet supported. Code suggested by Rui Ueyama. Differential revision: https://reviews.llvm.org/D38407 llvm-svn: 315051
2017-10-06 17:37:44 +08:00
# RUN: ld.lld --hash-style=sysv -o %t --script %t.script %t.o -shared
[ELF] readobj -elf-output-style=GNU -> readelf Style change for consistency. NFC llvm-svn: 335494
2018-06-26 00:49:52 +08:00
# RUN: llvm-readelf -l %t | FileCheck %s
Error out instead of producing a corrupt PT_LOAD. What bfd and gold do is give up in putting the headers in the PT_LOAD and just start the PT_LOAD in the second page. llvm-svn: 281660
2016-09-16 05:22:11 +08:00
[lld] Mitigate relocation overflow [part 1 of 2]. This CL places .dynsym and .dynstr at the beginning of SHF_ALLOC sections. We do this to mitigate the possibility that huge .dynsym and .dynstr sections placed between ro-data and text sections cause relocation overflow. Differential Revision: https://reviews.llvm.org/D45788 llvm-svn: 332374
2018-05-16 01:02:35 +08:00
# RUN: echo "SECTIONS {foo : {*(foo*)} .dynsym : { *(.dynsym) } .dynstr : { *(.dynstr) } }" > %t.script
[ELF] - Do --hash-style=both by default. Its PR34712, GNU linkers recently changed default values to "both" of "sysv". Patch do the same for all targets except MIPS, where .gnu.hash section is not yet supported. Code suggested by Rui Ueyama. Differential revision: https://reviews.llvm.org/D38407 llvm-svn: 315051
2017-10-06 17:37:44 +08:00
# RUN: ld.lld --hash-style=sysv -o %t --script %t.script %t.o -shared
[ELF] readobj -elf-output-style=GNU -> readelf Style change for consistency. NFC llvm-svn: 335494
2018-06-26 00:49:52 +08:00
# RUN: llvm-readelf -l %t | FileCheck %s
Start linker scripts at 0. We were implicitly creating space for the headers. That is not the behaviour of bfd, which requires the script to use SIZEOF_HEADERS. The difference is important for scripts that don't use SIZEOF_HEADERS and expect the first section to be at 0. llvm-svn: 282818
2016-09-30 08:16:11 +08:00
Don't error if we can't put the header in a PT_LOAD. If there is not sufficient address space, just give up and don't put the header in the PT_LOAD. This matches bfd behaviour and I found at least one script that depends on having a section at address 0. llvm-svn: 282750
2016-09-30 02:50:34 +08:00
# There is not enough address space available for the header, so just start the PT_LOAD
Don't create a bogus PT_PHDR if we don't allocate the headers. llvm-svn: 292644
2017-01-21 04:46:15 +08:00
# after it. Don't create a PT_PHDR as the header is not allocated.
Don't error if we can't put the header in a PT_LOAD. If there is not sufficient address space, just give up and don't put the header in the PT_LOAD. This matches bfd behaviour and I found at least one script that depends on having a section at address 0. llvm-svn: 282750
2016-09-30 02:50:34 +08:00
# CHECK: Program Headers:
# CHECK-NEXT: Type Offset VirtAddr PhysAddr
# CHECK-NEXT: LOAD 0x001000 0x0000000000000000 0x0000000000000000
# CHECK: Section to Segment mapping:
# CHECK-NEXT: Segment Sections...
[ELF] Assign RF_EXEC rank even if --no-rosegment or SECTIONS command is used Summary: Currently when --no-rosegment is specified or a linker script with SECTIONS command is used, .rodata (A) .text (AX) are assigned the same rank and .rodata may be placed after .text . This increases the gap between .text and .bss and can cause pc-relative relocation overflow (e.g. gcc crtbegin.o crtbegin.S have R_X86_64_PC32 relocation from .text to .bss). This patch makes SingleRoRx affect only segment layout, not section layout. As a consequence, .rodata will be placed before .text regardless of SingleRoRx. Reviewers: espindola, ruiu, grimar, echristo, javed.absar Subscribers: emaste, arichardson, llvm-commits Differential Revision: https://reviews.llvm.org/D48405 llvm-svn: 335627
2018-06-27 01:04:47 +08:00
# CHECK-NEXT: 00 foo .hash .dynsym .dynstr
Error out instead of producing a corrupt PT_LOAD. What bfd and gold do is give up in putting the headers in the PT_LOAD and just start the PT_LOAD in the second page. llvm-svn: 281660
2016-09-16 05:22:11 +08:00
.section foo, "a"
.quad 0