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llvm-project/lld/test/ELF/sort-norosegment.s

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[ELF] - Do not put non exec sections first when -no-rosegment That unifies handling cases when we have SECTIONS and when -no-rosegment is given in compareSectionsNonScript() Now Config->SingleRoRx is used for check, testcase is provided. llvm-svn: 288022
2016-11-28 18:26:21 +08:00
# REQUIRES: x86
[ELF] Change test files for style consistency. NFC * Move `REQUIRES:` line to the top * llvm-mc ... -o %t -> llvm-mc ... -o %t.o * Don't check "TEXT" "DATA" columns (they are bfd-style names that do not fit into llvm well) in llvm-objdump output llvm-svn: 335498
2018-06-26 01:07:40 +08:00
# RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t.o
[ELF] - Do not put non exec sections first when -no-rosegment That unifies handling cases when we have SECTIONS and when -no-rosegment is given in compareSectionsNonScript() Now Config->SingleRoRx is used for check, testcase is provided. llvm-svn: 288022
2016-11-28 18:26:21 +08:00
[ELF] Change test files for style consistency. NFC * Move `REQUIRES:` line to the top * llvm-mc ... -o %t -> llvm-mc ... -o %t.o * Don't check "TEXT" "DATA" columns (they are bfd-style names that do not fit into llvm well) in llvm-objdump output llvm-svn: 335498
2018-06-26 01:07:40 +08:00
# RUN: ld.lld --hash-style=sysv -no-rosegment -o %t %t.o -shared
[lld][NFC] Update tests to use -S instead of -s when using llvm-readelf. Summary: llvm-readobj/readelf accepts both -s and -S as aliases for --sections. However with GNU readelf only -S means --section, and -s means --symbols. I would like to make llvm-readelf more compatible. Reviewers: MaskRay, espindola Reviewed By: MaskRay Subscribers: emaste, arichardson, steven_wu, dexonsmith, llvm-commits Differential Revision: https://reviews.llvm.org/D54118 llvm-svn: 346164
2018-11-06 04:39:06 +08:00
# RUN: llvm-readelf -S %t | FileCheck %s
[ELF] - Do not put non exec sections first when -no-rosegment That unifies handling cases when we have SECTIONS and when -no-rosegment is given in compareSectionsNonScript() Now Config->SingleRoRx is used for check, testcase is provided. llvm-svn: 288022
2016-11-28 18:26:21 +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
# CHECK: .dynsym {{.*}} A
# CHECK-NEXT: .hash {{.*}} A
[ELF] Make non-writable non-executable PROGBITS sections closer to .text 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
2018-06-27 06:13:32 +08:00
# CHECK-NEXT: .dynstr {{.*}} A
[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: .text {{.*}} AX
ELF: Place relro sections after non-relro sections in r/w segment. This is in preparation for my next change, which will introduce a relro nobits section. That requires that relro sections appear at the end of the progbits part of the r/w segment so that the relro nobits section can appear contiguously. Because of the amount of churn required in the test suite, I'm making this change separately. llvm-svn: 291523
2017-01-10 09:21:30 +08:00
# CHECK-NEXT: .dynamic {{.*}} WA
[ELF] Simplify RelRo, TLS, NOBITS section ranks and make RW PT_LOAD start with RelRo Old: PT_LOAD(.data | PT_GNU_RELRO(.data.rel.ro .bss.rel.ro) | .bss) New: PT_LOAD(PT_GNU_RELRO(.data.rel.ro .bss.rel.ro) | .data .bss) The placement of | indicates page alignment caused by PT_GNU_RELRO. The new layout has simpler rules and saves space for many cases. Old size: roundup(.data) + roundup(.data.rel.ro) New size: roundup(.data.rel.ro + .bss.rel.ro) + .data Other advantages: * At runtime the 3 memory mappings decrease to 2. * start(PT_TLS) = start(PT_GNU_RELRO) = start(RW PT_LOAD). This simplifies binary manipulation tools. GNU strip before 2.31 discards PT_GNU_RELRO if its address is not equal to the start of its associated PT_LOAD. This has been fixed by https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=f2731e0c374e5323ce4cdae2bcc7b7fe22da1a6f But with this change, we will be compatible with GNU strip before 2.31 * Before, .got.plt (non-relro by default) was placed before .got (relro by default), which made it impossible to have _GLOBAL_OFFSET_TABLE_ (start of .got.plt on x86-64) equal to the end of .got (R_GOT*_FROM_END) (https://bugs.llvm.org/show_bug.cgi?id=36555). With the new ordering, we can improve on this regard if we'd like to. Reviewers: ruiu, espindola, pcc Subscribers: emaste, arichardson, llvm-commits, joerg, jdoerfert Differential Revision: https://reviews.llvm.org/D56828 llvm-svn: 356117
2019-03-14 11:47:45 +08:00
# CHECK-NEXT: foo {{.*}} WA
[ELF] - Do not put non exec sections first when -no-rosegment That unifies handling cases when we have SECTIONS and when -no-rosegment is given in compareSectionsNonScript() Now Config->SingleRoRx is used for check, testcase is provided. llvm-svn: 288022
2016-11-28 18:26:21 +08:00
.section foo, "aw"
.byte 0