similar to: [LLVMdev] [lld] ELF/AArch64 support in lld

I've been adding ELF/AArch64 support to lld based off the existing x86_64 code that is already there in lld. I've been able to compile and link a simple "Hello World"-type program. However, I'm getting what appears to be a misplacement/name change of the _start atom. When I do the link, the _start section gets named __tls_get_addr. The code inside this section appears to be

So you see the issue as well in ARM? When doing a objdump -D weakMainO1.exe | grep -A 10 "<_ZN1C13caller_methodEv>:" I see: 00008b88 <_ZN1C13caller_methodEv>: 8b88: e92d4800 push {fp, lr} 8b8c: e1a0b00d mov fp, sp 8b90: e24dd008 sub sp, sp, #8 8b94: e58d0004 str r0, [sp, #4] 8b98: e59d0004 ldr r0, [sp, #4] 8b9c: ebffdd17 bl 0

The --as-needed attribute is preserved and is contained within the ELF FileNode. By lld::files, I am referring to lld::File. Thanks Shankar Easwaran On 9/4/2013 4:10 PM, Rui Ueyama wrote: > On Wed, Sep 4, 2013 at 2:03 PM, Shankar Easwaran <shankare at codeaurora.org>wrote: > >> Yes, the Group is to represent --start-group,--end-group. >> >> So the group here will

Yes, the Group is to represent --start-group,--end-group. So the group here will be contained in the linker Input as a vector of lld::files (foo.a, bar.a). thanks Shankar Easwaran On 9/4/2013 3:59 PM, Rui Ueyama wrote: > The first question is that Group is to represent --start-group/--end-group? > > If I understand your proposal correctly, here's the thing: if file is not > in

On Wed, Sep 4, 2013 at 2:03 PM, Shankar Easwaran <shankare at codeaurora.org>wrote: > > Yes, the Group is to represent --start-group,--end-group. > > So the group here will be contained in the linker Input as a vector of > lld::files (foo.a, bar.a). It seems you dropped --as-needed attribute... ? By lld::files, what class are you pointing to, lld::File or lld::InputFiles?

Hi, After looking at the Normalized Readers in mach-o, I feel it would be nice if the Gnu flavor to adopt this design what mach-o did in addition to using obj2yaml. Its so much easier to test in the context of lld with normalized readers, IMO. Opinions ? Thanks Shankar Easwaran -- Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by the Linux Foundation

Hi, With the inputGraph now, lld models command line options, input files as nodes in the InputGraph called InputElements. In the current approach, each InputElement is converted to a LinkerInput, which works if all lld deals with individual files. Dealing with ControlNodes (Groups), have a problem with it, on how to model that as a LinkerInput. Joerg/Me were chatting on the IRC about this

I do think we have too many classes. I thought InputGraph was going to replace InputFiles. It seems link LinkerInput could be merged into FileNode. Originally InputFiles was the abstract interface that he Resolver used to see all the inputs. If InputGraph supported the methods forEachInitalAtom() and searchLibraries() then we could get rid of InputFiles and have the Resolver uses InputGraph

The first question is that Group is to represent --start-group/--end-group? If I understand your proposal correctly, here's the thing: if file is not in group, each individual file is wrapped with LinkerInput, but if it's in a group, it's not -- instead the entire group is wrapped with a LinkerInput. This asymmetry is a bit concerning. If we don't need a LinkerInput for each

Hi Nick, On 9/4/2013 4:04 PM, Nick Kledzik wrote: > I do think we have too many classes. Agree. > I thought InputGraph was going to replace InputFiles. Interesting idea. > It seems link LinkerInput could be merged into FileNode. Agree. > > Originally InputFiles was the abstract interface that he Resolver used to see all the inputs. If InputGraph supported the methods

On Sep 4, 2013, at 2:32 PM, Shankar Easwaran <shankare at codeaurora.org> wrote: > On 9/4/2013 4:04 PM, Nick Kledzik wrote: >> I do think we have too many classes. > Agree. >> I thought InputGraph was going to replace InputFiles. > Interesting idea. >> It seems link LinkerInput could be merged into FileNode. > Agree. >> >> Originally InputFiles

Hi Nick, These are the below modifications needed in lld to start processing groups :- 1) LinkerInput would be moved to FileNode that contains the following functions - getBuffer - takeBuffer - getPath 2) The driver will process the vector of InputElements and call /*process */on each of them. process() would create a lld::File object within the InputElement if its a

Hi, On MIPS st_other field in the ELF symbols table might contain some additional MIPS-specific flags besides visibility ones. These flags should be copied to the output linked file. If YAML => Native conversion is switched off, there is no problem. But in case of the conversion we lose st_other field values. So I need an advice how to keep this information. Is it a good idea to extend YAML

On Tue, Sep 24, 2013 at 10:49:36AM -0500, Shankar Easwaran wrote: > Not sure why this is being done for a long time with the GNU linker. Because the main program is not PIC, it will only use absolute references to global symbols. For functions, you can create a PLT record, but for data access, you have to hide the real symbol and copy the content over to the equivalent in the main binary.

When using the ARM cross compiler we've run into an issue with LTO and optimized libraries. Consider you have an optimized library opt.a, which contains a version of memcpy. Compiling with LTO (something like), clang myTest.c opt.a -flto -o myTest causes myTest.c to get compiled to bitcode. Then the bitcode gets passed to the linker. The linker looks through the bitcode (via

Glad to hear you can reproduce it. What I don't know is if this is a linker issue or an LLVM issue. -----Original Message----- From: Rafael Espíndola [mailto:rafael.espindola at gmail.com] Sent: Friday, May 30, 2014 3:58 PM To: Daniel Stewart Cc: LLVM Developers Mailing List Subject: Re: Error with Gold Linker during LTO Sorry, I had understood that the linker was crashing, not the

Thanks for the reply Pete. Unfortunately, I don’t think it is going to be as simple as ignoring those loads which only store. In findCommonType(), only one alloca is passed in at a time. So, while you could find those cases where that alloca was loaded from and stored elsewhere, you can’t find those places that store to that alloca from somewhere else (at least not easily that I can see). So

On 9/23/2013 7:07 PM, Nick Kledzik wrote: > On Sep 23, 2013, at 4:52 PM, Michael Spencer <bigcheesegs at gmail.com> wrote: > >> The following code currently links incorrectly when linking against a dynamic libc on Ubuntu 12.10 unless -fpic is specified. >> >> #include <stdio.h> >> >> int main() { >> fputs("hi\n", stdout); >>

On Wed, Sep 4, 2013 at 2:04 PM, Nick Kledzik <kledzik at apple.com> wrote: > I do think we have too many classes. I thought InputGraph was going to > replace InputFiles. It seems link LinkerInput could be merged into > FileNode. > > Originally InputFiles was the abstract interface that he Resolver used to > see all the inputs. If InputGraph supported the methods >

On Sep 24, 2013, at 9:13 AM, Joerg Sonnenberger wrote: > On Tue, Sep 24, 2013 at 10:49:36AM -0500, Shankar Easwaran wrote: >> Not sure why this is being done for a long time with the GNU linker. > > Because the main program is not PIC, it will only use absolute > references to global symbols. For functions, you can create a PLT > record, but for data access, you have to hide