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* [ELF] Make non-writable non-executable PROGBITS sections closer to .textFangrui Song2018-06-261-1/+1
| | | | | | | | | | | | This generalizes the old heuristic placing SHT_DYNSYM SHT_DYNSTR first in the readonly SHF_ALLOC segment. Reviewers: espindola Subscribers: emaste, arichardson, llvm-commits Differential Revision: https://reviews.llvm.org/D48406 llvm-svn: 335674
* [ELF] Assign RF_EXEC rank even if --no-rosegment or SECTIONS command is usedFangrui Song2018-06-261-2/+2
| | | | | | | | | | | | | | | | | 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
* [ELF] readobj -elf-output-style=GNU -> readelfFangrui Song2018-06-251-3/+2
| | | | | | Style change for consistency. NFC llvm-svn: 335494
* [lld] Mitigate relocation overflow [part 1 of 2].Han Shen2018-05-151-2/+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
* [ELF] - Revert of: r332038, r332054, r332060, r332061, r332062, r332063George Rimar2018-05-111-2/+2
| | | | | | | | | | | This reverts "Mitigate relocation overflow [part 1 of 2]." and the following commits which were trying to fix the bots. At the moment of r332082, bots are still failing and we need to find the reason of test case breakages first of all. http://lab.llvm.org:8011/builders/llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast/builds/17042/steps/test/logs/stdio http://lab.llvm.org:8011/builders/llvm-clang-lld-x86_64-scei-ps4-ubuntu-fast/builds/29845/steps/test/logs/stdio llvm-svn: 332085
* Mitigate relocation overflow [part 1 of 2].Han Shen2018-05-101-2/+2
| | | | | | | | | | | | This CL is to mitigate R_X86_64_PC32 relocation overflow problems for huge binaries that has near 4G allocated sections. By examining those binaries, there're 2 issues contributes to the problem: 1). huge ".dynsym" and ".dynstr" stands in the way between .rodata and .text 2). _init_array_start/end are placed at 0 if no ".init_array" presents, this causes .text relocation against them become more prone to overflow. This CL addresses 1st problem (the 2nd will be addressed in another CL.) by assigning a smaller sortrank to .dynsym and .dynstr thus they no longer stand in between. llvm-svn: 332038
* [ELF] - Rename test cases to *.test.George Rimar2018-03-131-0/+23
This is a follow-up for r327410. llvm-svn: 327416
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