search for: symtab

Hi everyone, I am fairly new to LLVM, I'm working on a new backend. I am trying to add information to a specific instruction using the .symtab in the ELF format. I've been searching through the LLVM source code trying to find a way to do such a thing. Can anyone help me with some directions or point me to some documents in the matter. Thanks, Liad. -------------- next part -------------- An HTML attachment was scrubbed... URL: <ht...

Hey Paul, first of all thank you for taking the time to answer me, if I understand you correctly, I need to modify the instruction it self so one of it's operands is a symbol, and then at MC layer handle that symbol and add an entry to the symtab for that label? What kind of symbol should I use doing such thing? external symbol or MCSymbol? I was trying to find where in the code during the MC layer I add entries to the symtab, I'd really appreciate some directions in the area. Let me give an example so my questions might be a bit more...

...rent compilation units, but if they are in the same compilation then it should be pretty straightforward. --paulr From: Liad Mordekoviz [mailto:liad.mordekoviz at nextsilicon.com] Sent: Thursday, December 14, 2017 1:00 PM To: Robinson, Paul; llvm-dev Subject: Re: [llvm-dev] Help adding entries to .symtab Hey Paul, first of all thank you for taking the time to answer me, if I understand you correctly, I need to modify the instruction it self so one of it's operands is a symbol, and then at MC layer handle that symbol and add an entry to the symtab for that label? What kind of symbol should I us...

lld/test/ELF/invalid/symtab-sh-info.s (check-lld-elf) is recently flaky on Windows, e.g. https://reviews.llvm.org/harbormaster/unit/view/192869/ http://45.33.8.238/win/27684/step_10.txt It fails like every 3 or 4 builds. Could someone with a Windows machine check what is going on? Is that due to output non-determinism (just...

Hi! If there is a string table for section headers, it also gets loaded. Therefore take it into account in size calculation for kernel symtab. Also there is no need to call elf_set_verbose() a second time after elf_init() (First call happens within elf_init()). Signed-off-by: Christoph Egger <Christoph.Egger@amd.com> Keir: Can you also apply changeset 15672 and this patch to Xen 3.1-stable, since these fixes an regression for Xe...

On Fri, May 15, 2015 at 5:11 AM, Dave Bozier <seifsta at gmail.com> wrote: > > Are you sure about the additional I/O? With native symtab, existing > tools just need to read those, while plugin based approach needs to read > bit code section to feedback symbols to the tool. > > The additional I/O will be quite big if you are going to emit the full > symbol table. Looking at some of our real world links the symbol table...

...via llvm-dev <llvm-dev at lists.llvm.org> Reply-To: Fāng-ruì Sòng <maskray at google.com> Date: Tuesday, November 10, 2020 at 10:13 PM To: LLVM Developers Mailing List <llvm-dev at lists.llvm.org> Cc: Nico Weber <thakis at chromium.org> Subject: [llvm-dev] lld :: ELF/invalid/symtab-sh-info.s is flaky on Windows lld/test/ELF/invalid/symtab-sh-info.s (check-lld-elf) is recently flaky on Windows, e.g. https://reviews.llvm.org/harbormaster/unit/view/192869/<https://reviews.llvm.org/harbormaster/unit/view/192869/> http://45.33.8.238/win/27684/step_10.txt<http://45.33.8....

This adds [f]getc() and fgets() for parsing config files. Probably hard to avoid. Still trying to decide if I actually want to add system() or not. -hpa

Hello, I am receiving this error: assert(Slot != -1 && "Value in symtab but has no slot number!!"); While trying to generate a module at run time using LLVM classes. Specifically with an instance of StoreInst class. After I generate all the instructions, I try to save the Module to bytecode, but I receive that error in the method 'outputSymbolTable' Does...

Hi, I am trying to write a simple interpreter. I am trying to generate LLVM IR for assignment operation. The code for the generation part looks like this llvm::Value* codeGenSymTab(llvm::LLVMContext& context) { > printf("\n CodeGen SymTab \n"); > Value *num = ConstantInt::get(Type::getInt64Ty(context), aTable.value, > true); > Value *alloc = new AllocaInst(IntegerType::get(context, 32), > aTable.variableName,entry); > StoreInst...

....debug_str > 12.6% 827Ki 0.0% 0 .debug_line > 6.5% 428Ki 63.8% 428Ki .text > 4.8% 317Ki 0.0% 0 .strtab > 3.4% 223Ki 0.0% 0 .debug_ranges > 2.0% 133Ki 19.8% 133Ki .eh_frame > 1.7% 110Ki 0.0% 0 .symtab > 1.2% 77.6Ki 0.0% 0 .debug_abbrev > > b) > > FILE SIZE VM SIZE > -------------- -------------- > 40.2% 2.10Mi 0.0% 0 .debug_info > 30.7% 1.60Mi 0.0% 0 .debug_str > 8.0% 428Ki 63.8% 428Ki .text >...

...the symbol table directly (don't do that!) :) Maybe you have a labeled basic block that you never inserted into the function? Reid. On Fri, 2005-06-03 at 22:17 -0700, Ricardo wrote: > Hello, > > I am receiving this error: > > assert(Slot != -1 && "Value in symtab but has no slot number!!"); > > While trying to generate a module at run time using LLVM classes. Specifically with an instance of > StoreInst class. After I generate all the instructions, I try to save the Module to bytecode, but > I receive that error in the method 'outputSy...

When LLD builds a shared library for x86_64 it puts _GLOBAL_OFFSET_TABLE_ to the both .symtab and .dynsym and defines it as a GLOBAL symbol. If later this shared library participates in executable file linking and GNU BFD linked is used for that, this linker shows an error: /usr/bin/ld: a.out: hidden symbol `_GLOBAL_OFFSET_TABLE_' in /usr/lib/x86_64-linux-gnu/crt1.o is referenced by DS...

...Maybe you have a labeled basic block that you never inserted > into the function? > > Reid. > > On Fri, 2005-06-03 at 22:17 -0700, Ricardo wrote: > > Hello, > > > > I am receiving this error: > > > > assert(Slot != -1 && "Value in symtab but has no slot number!!"); > > > > While trying to generate a module at run time using LLVM classes. Specifically with an > instance of > > StoreInst class. After I generate all the instructions, I try to save the Module to bytecode, > but > > I receive that err...

...sion 1.38 diff -u -r1.38 ArchiveReader.cpp --- lib/Bytecode/Archive/ArchiveReader.cpp 29 Dec 2004 01:20:24 -0000 1.38 +++ lib/Bytecode/Archive/ArchiveReader.cpp 26 Feb 2005 20:05:12 -0000 @@ -503,3 +503,32 @@ } } } + +bool +Archive::isBytecodeArchive() +{ + //Make sure the symTab has been loaded... + //in most cases this should have been done + //when the archive was constructed, but still, + //this is just in case. + if ( !symTab.size() ) + loadSymbolTable(); + + //Now that we know it's been loaded, return true + //if it has a size + if ( symTab.size() ) retu...

...+/* + * Generate GOT entries for GOTPCREL relocations that do not exists in the + * kernel GOT. Based on arm64 module-plts implementation. + */ +int module_frob_arch_sections(Elf_Ehdr *ehdr, Elf_Shdr *sechdrs, + char *secstrings, struct module *mod) +{ + unsigned long gots = 0; + Elf_Shdr *symtab = NULL; + Elf64_Sym *syms = NULL; + char *strings, *name; + int i; + + /* + * Find the empty .got section so we can expand it to store the PLT + * entries. Record the symtab address as well. + */ + for (i = 0; i < ehdr->e_shnum; i++) { + if (!strcmp(secstrings + sechdrs[i].sh_name, "...

Hi, We are trying to use clang as a drop-in replacement for the gcc come with Android NDK. I found that MC/ELF doesn't not handle Thumb functions properly, e.g., bit 0 of the function name in the .symtab is not set to 1, and some thumb instructions are not generated correctly, e.g., the addresses for tBL/tBLX are not calculated right. With that attached patch, we can compile and run some (not all) Android NDK samples without problem. The attached initial patch 1. sets bit 0 of the function addres...

...istory in svn. -Jim On May 12, 2011, at 10:42 PM, Koan-Sin Tan wrote: > Hi, > > We are trying to use clang as a drop-in replacement for the gcc come with > Android NDK. I found that MC/ELF doesn't not handle Thumb functions properly, > e.g., bit 0 of the function name in the .symtab is not set to 1, and some thumb > instructions are not generated correctly, e.g., the addresses for tBL/tBLX are > not calculated right. > > With that attached patch, we can compile and run some (not all) Android > NDK samples without problem. > > The attached initial patch &...

...nally, we also want to avoid doing partial LTO/ThinLTO across files linked with “$LD -r” (i.e. the resulting object file should still contain native object-wrapped bitcode to enable ThinLTO at the full link step). I will send a separate design document for these changes, including the format of the symtab and function index/summary section, but the following is a high-level motivation and overview. Note that support for ThinLTO using bitcode can be added as a follow-on under an option, so that bitcode-aware tools do not need to use the wrapper. Under the bitcode-only option, the symbol table will...

...s correctly in the end. I still haven't figured out which type of relocation is needed. All I know is that GCC generates .rel.debug_info relocations that clang doesn't: clang: ** Section #6 '.rel.debug_info' (SHT_REL) Size : 40 bytes (alignment 4) Symbol table #22 '.symtab' 5 relocations applied to section #5 '.debug_info' GCC: ** Section #7 '.rel.debug_info' (SHT_REL) Size : 184 bytes (alignment 4) Symbol table #22 '.symtab' 23 relocations applied to section #6 '.debug_info' I'll dig deeper and see if I ca...