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* [AArch64] Implement stack probing for windowsMartin Storsjo2017-12-201-0/+28
| | | | | | Differential Revision: https://reviews.llvm.org/D41131 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@321150 91177308-0d34-0410-b5e6-96231b3b80d8
* Change section flag character for SHF_LINK_ORDER to "o".Evgeniy Stepanov2017-04-041-3/+3
| | | | | | | | GAS uses "m" as a compatibility alias for "M" (SHF_MERGE). "o" is free, except on ia64, where it already means SHF_LINK_ORDER. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@299479 91177308-0d34-0410-b5e6-96231b3b80d8
* Make it possible to set SHF_LINK_ORDER explicitly.Rafael Espindola2017-02-091-0/+18
| | | | | | | This will make it possible to add support for gcing user metadata (asan for example). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@294589 91177308-0d34-0410-b5e6-96231b3b80d8
* MC: Introduce the ABS8 symbol modifier.Peter Collingbourne2017-01-311-0/+22
| | | | | | | | | | | @ABS8 can be applied to symbols which appear as immediate operands to instructions that have a 8-bit immediate form for that operand. It causes the assembler to use the 8-bit form and an 8-bit relocation (e.g. R_386_8 or R_X86_64_8) for the symbol. Differential Revision: https://reviews.llvm.org/D28688 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@293667 91177308-0d34-0410-b5e6-96231b3b80d8
* Silence some Sphinx diagnostics in an attempt to get the documentation ↵Aaron Ballman2017-01-171-1/+1
| | | | | | builder back to green (http://lab.llvm.org:8011/builders/llvm-sphinx-docs/builds/1895). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@292271 91177308-0d34-0410-b5e6-96231b3b80d8
* Reapply "[CodeGen] Fix invalid DWARF info on Win64"Keno Fischer2017-01-021-1/+1
| | | | | | | This reapplies rL289013 (reverted in rL289014) with the fixes identified in D21731. Should hopefully pass the buildbots this time. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@290809 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert "[CodeGen] Fix invalid DWARF info on Win64"Keno Fischer2016-12-081-1/+1
| | | | | | Appears to break on build bots. Reverting pending investigation. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@289014 91177308-0d34-0410-b5e6-96231b3b80d8
* [CodeGen] Fix invalid DWARF info on Win64Keno Fischer2016-12-081-1/+1
| | | | | | | | | | | | | | | The relocations for `DIEEntry::EmitValue` were wrong for Win64 (emitting FK_Data_4 instead of FK_SecRel_4). This corrects that oversight so that the DWARF data is correct in Win64 COFF files. Fixes PR15393. Patch by Jameson Nash <jameson@juliacomputing.com> based on a patch by David Majnemer. Differential Revision: https://reviews.llvm.org/D21731 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@289013 91177308-0d34-0410-b5e6-96231b3b80d8
* Document our extension to the COFF .section directive flagsReid Kleckner2016-09-151-0/+16
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@281616 91177308-0d34-0410-b5e6-96231b3b80d8
* [docs] Fixing Sphinx warnings to unclog the buildbotRenato Golin2016-07-201-1/+1
| | | | | | | | | | | | | | | | | | | | | | | Lots of blocks had "llvm" or "nasm" syntax types but either weren't following the syntax, or the syntax has changed (and sphinx hasn't keep up) or the type doesn't even exist (nasm?). Other documents had :options: what were invalid. I only removed those that had warnings, and left the ones that didn't, in order to follow the principle of least surprise. This is like this for ages, but the buildbot is now failing on errors. It may take a while to upgrade the buildbot's sphinx, if that's even possible, but that shouldn't stop us from getting docs updates (which seem down for quite a while). Also, we're not losing any syntax highlight, since when it doesn't parse, it doesn't colour. Ie. those blocks are not being highlighted anyway. I'm trying to get all docs in one go, so that it's easy to revert later if we do fix, or at least easy to know what's to fix. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@276109 91177308-0d34-0410-b5e6-96231b3b80d8
* Use a comma after the unique keyword.Rafael Espindola2015-04-061-2/+2
| | | | | | | | H.J. Lu noted that all .section options are separated by a comma. This patch changes the syntax of unique to require one. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@234174 91177308-0d34-0410-b5e6-96231b3b80d8
* Implement unique sections with an unique ID.Rafael Espindola2015-04-041-0/+23
| | | | | | | | | | | This allows the compiler/assembly programmer to switch back to a section. This in turn fixes the bootstrap failure on powerpc (tested on gcc110) without changing the ppc codegen at all. I will try to cleanup the various getELFSection overloads in a followup patch. Just using a default argument now would lead to ambiguities. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@234099 91177308-0d34-0410-b5e6-96231b3b80d8
* ARM: add VLA extension for WoA Itanium ABISaleem Abdulrasool2014-06-091-0/+14
| | | | | | | | | | | | | | | | The armv7-windows-itanium environment is nearly identical to the MSVC ABI. It has a few divergences, mostly revolving around the use of the Itanium ABI for C++. VLA support is one of the extensions that are amongst the set of the extensions. This adds support for proper VLA emission for this environment. This is somewhat similar to the handling for __chkstk emission on X86 and the large stack frame emission for ARM. The invocation style for chkstk is still controlled via the -mcmodel flag to clang. Make an explicit note that this is an extension. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210489 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix a few issues with comdat handling on COFF.Rafael Espindola2014-06-061-15/+20
| | | | | | | | | | | | | | | | | | | | | * Section association cannot use just the section name as many sections can have the same name. With this patch, the comdat symbol in an assoc section is interpreted to mean a symbol in the associated section and the mapping is discovered from it. * Comdat symbols were not being set correctly. Instead we were getting whatever was output first for that section. A consequence is that associative sections now must use .section to set the association. Using .linkonce would not work since it is not possible to change a sections comdat symbol (it is used to decide if we should create a new section or reuse an existing one). This includes r210298, which was reverted because it was asserting on an associated section having the same comdat as the associated section. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210367 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix typosAlp Toker2014-05-151-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@208839 91177308-0d34-0410-b5e6-96231b3b80d8
* ARM: support stack probe emission for Windows on ARMSaleem Abdulrasool2014-04-301-0/+31
| | | | | | | | | | | | | | | | | This introduces the stack lowering emission of the stack probe function for Windows on ARM. The stack on Windows on ARM is a dynamically paged stack where any page allocation which crosses a page boundary of the following guard page will cause a page fault. This page fault must be handled by the kernel to ensure that the page is faulted in. If this does not occur and a write access any memory beyond that, the page fault will go unserviced, resulting in an abnormal program termination. The watermark for the stack probe appears to be at 4080 bytes (for accommodating the stack guard canaries and stack alignment) when SSP is enabled. Otherwise, the stack probe is emitted on the page size boundary of 4096 bytes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207615 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix typoNico Rieck2014-02-151-2/+2
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201461 91177308-0d34-0410-b5e6-96231b3b80d8
* [COFF] Add support for the .secidx directiveTimur Iskhodzhanov2013-12-201-1/+17
| | | | | | Reviewed at http://llvm-reviews.chandlerc.com/D2445 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@197826 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix a typo in the docsTimur Iskhodzhanov2013-12-201-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@197798 91177308-0d34-0410-b5e6-96231b3b80d8
* Support multiple COFF sections with the same name but different COMDAT.Rafael Espindola2013-11-191-0/+38
| | | | | | | | | | | | | | | | | | This is the first step to fix pr17918. It extends the .section directive a bit, inspired by what the ELF one looks like. The problem with using linkonce is that given .section foo .linkonce.... .section foo .linkonce we would already have switched sections when getting to .linkonce. The cleanest solution seems to be to add the comdat information in the .section itself. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@195148 91177308-0d34-0410-b5e6-96231b3b80d8
* Sphinx refuses to render this code block. Try adding a newline.Benjamin Kramer2013-08-141-0/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188382 91177308-0d34-0410-b5e6-96231b3b80d8
* Add the C99 hex-float assembly syntax to our extension document.Tim Northover2013-08-141-0/+13
| | | | | | | As Ben pointed out, GAS doesn't support this syntax so we should give at least some warning that it might not be portable. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188377 91177308-0d34-0410-b5e6-96231b3b80d8
* MC: Implement COFF .linkonce directiveNico Rieck2013-07-061-1/+55
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185753 91177308-0d34-0410-b5e6-96231b3b80d8
* MC: Support COFF image-relative MCSymbolRefsNico Rieck2013-04-101-0/+39
Add support for the COFF relocation types IMAGE_REL_I386_DIR32NB and IMAGE_REL_AMD64_ADDR32NB for 32- and 64-bit respectively. These are similar to normal 4-byte relocations except that they do not include the base address of the image. Image-relative relocations are used for debug information (32-bit) and SEH unwind tables (64-bit). A new MCSymbolRef variant called 'VK_COFF_IMGREL32' is introduced to specify such relocations. For AT&T assembly, this variant can be accessed using the symbol suffix '@imgrel'. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179240 91177308-0d34-0410-b5e6-96231b3b80d8
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