search for: d40849

For those interested, I've updated the patch on D40849. It is significantly simpler, emitting the options as pairs of C-style strings in a section named `.linker-options` as the agreement here was. On Fri, Jan 12, 2018 at 8:41 PM, Rui Ueyama via llvm-dev < llvm-dev at lists.llvm.org> wrote: > On Fri, Jan 12, 2018 at 5:56 PM, Cary Coutant vi...

...ia embedding strings, which specify linker behavior, into a .linker-options section in relocatable object files, see: RFC - http://lists.llvm.org/pipermail/llvm-dev/2018-January/120101.html LLVM - https://llvm.org/docs/Extensions.html#linker-options-section-linker-options, https://reviews.llvm.org/D40849 Clang - https://clang.llvm.org/docs/LanguageExtensions.html#specifying-linker-options-on-elf-targets, https://reviews.llvm.org/D42758 However, although support was added to Clang and LLVM, no support has been implemented in LLD; and, I get the sense, from reading the reviews, that there wasn't...

...into a .linker-options section in >> relocatable object files, see: >> >> RFC - http://lists.llvm.org/pipermail/llvm-dev/2018-January/120101.html >> LLVM - >> https://llvm.org/docs/Extensions.html#linker-options-section-linker-options, >> https://reviews.llvm.org/D40849 >> Clang - >> https://clang.llvm.org/docs/LanguageExtensions.html#specifying-linker-options-on-elf-targets, >> https://reviews.llvm.org/D42758 >> >> However, although support was added to Clang and LLVM, no support has >> been implemented in LLD; and, I get the s...

...into a .linker-options section in >> relocatable object files, see: >> >> RFC - http://lists.llvm.org/pipermail/llvm-dev/2018-January/120101.html >> LLVM - >> https://llvm.org/docs/Extensions.html#linker-options-section-linker-options, >> https://reviews.llvm.org/D40849 >> Clang - >> https://clang.llvm.org/docs/LanguageExtensions.html#specifying-linker-options-on-elf-targets, >> https://reviews.llvm.org/D42758 >> >> However, although support was added to Clang and LLVM, no support has >> been implemented in LLD; and, I get the s...

On Fri, Jan 12, 2018 at 5:56 PM, Cary Coutant via llvm-dev < llvm-dev at lists.llvm.org> wrote: > > Given how ELF works I would expect an unknown section to simply end up > > in the output, but we can use SHF_EXCLUDE to avoid that. > > Yes, gold currently treats unknown section types pretty much the same > as PROGBITS sections. The SHF_ALLOCATE and SHF_EXCLUDE flags

...t; relocatable object files, see: >>>> >>>> RFC - http://lists.llvm.org/pipermail/llvm-dev/2018-January/120101.html >>>> LLVM - >>>> https://llvm.org/docs/Extensions.html#linker-options-section-linker-options, >>>> https://reviews.llvm.org/D40849 >>>> Clang - >>>> https://clang.llvm.org/docs/LanguageExtensions.html#specifying-linker-options-on-elf-targets, >>>> https://reviews.llvm.org/D42758 >>>> >>>> However, although support was added to Clang and LLVM, no support has >>&g...

> Given how ELF works I would expect an unknown section to simply end up > in the output, but we can use SHF_EXCLUDE to avoid that. Yes, gold currently treats unknown section types pretty much the same as PROGBITS sections. The SHF_ALLOCATE and SHF_EXCLUDE flags would control where and whether the section goes into the output file. Another thing that we need to work out is the link order.

...t;>>>> RFC - >>>>>> http://lists.llvm.org/pipermail/llvm-dev/2018-January/120101.html >>>>>> LLVM - >>>>>> https://llvm.org/docs/Extensions.html#linker-options-section-linker-options, >>>>>> https://reviews.llvm.org/D40849 >>>>>> Clang - >>>>>> https://clang.llvm.org/docs/LanguageExtensions.html#specifying-linker-options-on-elf-targets, >>>>>> https://reviews.llvm.org/D42758 >>>>>> >>>>>> However, although support was added to C...

...;>>>>>> http://lists.llvm.org/pipermail/llvm-dev/2018-January/120101.html >>>>>>>> LLVM - >>>>>>>> https://llvm.org/docs/Extensions.html#linker-options-section-linker-options, >>>>>>>> https://reviews.llvm.org/D40849 >>>>>>>> Clang - >>>>>>>> https://clang.llvm.org/docs/LanguageExtensions.html#specifying-linker-options-on-elf-targets, >>>>>>>> https://reviews.llvm.org/D42758 >>>>>>>> >>>>>>>>...

...;>>>>>> http://lists.llvm.org/pipermail/llvm-dev/2018-January/120101.html >>>>>>>> LLVM - >>>>>>>> https://llvm.org/docs/Extensions.html#linker-options-section-linker-options, >>>>>>>> https://reviews.llvm.org/D40849 >>>>>>>> Clang - >>>>>>>> https://clang.llvm.org/docs/LanguageExtensions.html#specifying-linker-options-on-elf-targets, >>>>>>>> https://reviews.llvm.org/D42758 >>>>>>>> >>>>>>>>...

...; http://lists.llvm.org/pipermail/llvm-dev/2018-January/120101.html >>>>>>>>>> LLVM - >>>>>>>>>> https://llvm.org/docs/Extensions.html#linker-options-section-linker-options, >>>>>>>>>> https://reviews.llvm.org/D40849 >>>>>>>>>> Clang - >>>>>>>>>> https://clang.llvm.org/docs/LanguageExtensions.html#specifying-linker-options-on-elf-targets, >>>>>>>>>> https://reviews.llvm.org/D42758 >>>>>>>>>> &...

...pipermail/llvm-dev/2018-January/120101.html >>>>>>>>>>>> LLVM - >>>>>>>>>>>> https://llvm.org/docs/Extensions.html#linker-options-section-linker-options, >>>>>>>>>>>> https://reviews.llvm.org/D40849 >>>>>>>>>>>> Clang - >>>>>>>>>>>> https://clang.llvm.org/docs/LanguageExtensions.html#specifying-linker-options-on-elf-targets, >>>>>>>>>>>> https://reviews.llvm.org/D42758 >>>>&g...

Hello all, There was some interest from a number of a few people about adding support for embedded linker options to ELF. This would be an extension that requires linker support to actually work, but has significant prior art with PE/COFF as well as MachO both having support for this. The desire here is to actually add support to LLVM to pass along the necessary information into the object