search for: shf_group

Hi Nick, I am trying to implement support for handling section groups in lld. There are two ways of figuring out section groups with ELF. a) Sections with SHF_GROUP property b) .gnu.linkonce sections (the signature identified by the name of the section) -- This was the method to coalesce similiar constants. Section Groups(SHF_GROUP) is the preferred way on ELF but .gnu.linkonce sections is also used. We would need to support both occurences in ELF files wi...

On Oct 29, 2013, at 9:52 PM, Shankar Easwaran wrote: > I am trying to implement support for handling section groups in lld. > > There are two ways of figuring out section groups with ELF. > > a) Sections with SHF_GROUP property > b) .gnu.linkonce sections (the signature identified by the name of the section) -- This was the method to coalesce similiar constants. > > Section Groups(SHF_GROUP) is the preferred way on ELF but .gnu.linkonce sections is also used. > > We would need to support both occ...

...peer code in llvm/trunk/lib/Target/X86/X86MCInstLower.cpp : void X86AsmPrinter::EmitXRayTable() { if (Sleds.empty()) return; if (Subtarget->isTargetELF()) { auto *Section = OutContext.getELFSection( "xray_instr_map", ELF::SHT_PROGBITS, ELF::SHF_ALLOC | ELF::SHF_GROUP | ELF::SHF_MERGE, 0, CurrentFnSym->getName()); auto PrevSection = OutStreamer->getCurrentSectionOnly(); OutStreamer->SwitchSection(Section); for (const auto &Sled : Sleds) { OutStreamer->EmitSymbolValue(Sled.Sled, 8); OutStreamer->EmitSymbolValue(C...

On 10/30/2013 12:53 AM, Nick Kledzik wrote: > On Oct 29, 2013, at 9:52 PM, Shankar Easwaran wrote: >> I am trying to implement support for handling section groups in lld. >> >> There are two ways of figuring out section groups with ELF. >> >> a) Sections with SHF_GROUP property >> b) .gnu.linkonce sections (the signature identified by the name of the section) -- This was the method to coalesce similiar constants. >> >> Section Groups(SHF_GROUP) is the preferred way on ELF but .gnu.linkonce sections is also used. >> >> We would need t...

> On 4 Aug 2016, at 06:27, Serge Rogatch <serge.rogatch at gmail.com> wrote: > > Hi Dean, > > I have a question about the following piece of code in compiler-rt/trunk/lib/xray/xray_trampoline_x86.S : > movq _ZN6__xray19XRayPatchedFunctionE(%rip), %rax > testq %rax, %rax > je .Ltmp0 > > // assume that %r10d has the function id. > movl %r10d,

...void X86AsmPrinter::EmitXRayTable() { > > if (Sleds.empty()) > > return; > > if (Subtarget->isTargetELF()) { > > auto *Section = OutContext.getELFSection( > > "xray_instr_map", ELF::SHT_PROGBITS, > > ELF::SHF_ALLOC | ELF::SHF_GROUP | ELF::SHF_MERGE, 0, > > CurrentFnSym->getName()); > > auto PrevSection = OutStreamer->getCurrentSectionOnly(); > > OutStreamer->SwitchSection(Section); > > for (const auto &Sled : Sleds) { > > OutStreamer->EmitSymbolValue(Sled...