similar to: RFC: Linker feature for automatically partitioning a program into multiple binaries

I covered the example of the operating system API in the original proposal, but yes, you might also be able to use this for kernel modules. The justification isn't as great for them since kernels typically require linker scripts, and I'm not planning to make this compatible with linker scripts. But if you did manage to write a kernel that didn't need a linker script, this seems like it

On Tue, Feb 26, 2019 at 6:41 PM Eli Friedman <efriedma at quicinc.com> wrote: > This seems like a very complicated approach… do you have some numbers to > give some idea how much of an improvement we’re talking about here over a > more conventional solution involving shared libraries? Or have you not > gotten that far? > I can talk to my internal customer to see what kind

This adds support for CONFIG_COMPAT_VDSO. As this will certainly raise questions, I left in the code needed for an alternative approach (which requires mode C code, but less build script changes). Signed-off-by: Jan Beulich <jbeulich@novell.com> Index: head-2007-02-27/arch/i386/Kconfig =================================================================== ---

This adds support for CONFIG_COMPAT_VDSO. As this will certainly raise questions, I left in the code needed for an alternative approach (which requires mode C code, but less build script changes). Signed-off-by: Jan Beulich <jbeulich@novell.com> Index: head-2007-02-27/arch/i386/Kconfig =================================================================== ---

This adds support for CONFIG_COMPAT_VDSO. As this will certainly raise questions, I left in the code needed for an alternative approach (which requires mode C code, but less build script changes). Signed-off-by: Jan Beulich <jbeulich@novell.com> Index: head-2007-02-27/arch/i386/Kconfig =================================================================== ---

The ELF file header isn't always covered by a segment but still affects loading. I think everything else that effects loading/dynamic linking is always covered by a PT_LOAD segment. As evidence this is basically what --strip-sections in llvm-strip and eu-strip do and they produce perfectly runnable binaries. Having a hash of the actual memory map is interesting IMO. Build IDs can't really

Right. Usually you wouldn't want to write a .tbe from scratch, but for the sake of linking against a DSO you might only have access to a .tbe stub that was produced from the DSO. This specific functionality becomes critical when DSOs only used for linking are replaced entirely by .tbe stubs because at a SDK level the complete DSO isn't needed. This is what Apple has done to significantly

Absolutely. The goal of the tool is to produce both textual and binary DSO stubs. This means you could take a DSO, produce a textual stub, modify it however you wish, and then produce a linkable binary stub from that modified .tbe. That, or you could bypass the textual portion altogether and just produce binary stubs from DSOs. While the textual format is useful, the goal is to make the tool

Paravirt-ops guests which move the fixmap also end up moving the syscall = VDSO. This fails if it is prelinked at a fixed address, which is why = COMPAT_VDSO is broken under CONFIG_VMI (and also under CONFIG_XEN). = Several options are available to try to address this. Jan had cooked up = a patch for Xen that used build magic to find the parts of the VDSO that = need relocation. I

Paravirt-ops guests which move the fixmap also end up moving the syscall = VDSO. This fails if it is prelinked at a fixed address, which is why = COMPAT_VDSO is broken under CONFIG_VMI (and also under CONFIG_XEN). = Several options are available to try to address this. Jan had cooked up = a patch for Xen that used build magic to find the parts of the VDSO that = need relocation. I

The goal of this proposal is to introduce a new type of YAML section for yaml2obj that allows the population of ELF .dynamic entries via a list of tag and value pairs. These entries are interpreted (and potentially validated) before being written to the .dynamic section. The simplest way to satisfy this requirement is for all dynamic entry values to be numeric values. Unfortunately, this

Hello all, LLVM-TAPI seeks to decouple the necessary link-time information for a dynamic shared object from the implementation of the runtime object. This process will be referred to as dynamic shared object (DSO) stubbing throughout this proposal. A number of projects have implemented their own versions of shared object stubbing for a variety of reasons related to improving the overall linking

This patch is just a (shameless) copy from bug #28 [1]. The original patch has been sitting there for a couple of years now, and it was based on Syslinux v 4.05. The patch I am posting here is just a re-base on v.6.03. Whichever inadequate formatting (tabs, trailing spaces...), or any kind of correction that was required for the original patch to be accepted, is probably still required now.

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 DSO Gold

Debug info linking is currently broken due to how we handle reading and laying out non SHF_ALLOC sections. I posted a patch that partially fixes this, but it's both the wrong approach and doesn't handle multiple input files with debug info (wrong relocation values). The first issue is representing non SHF_ALLOC atoms in the Atom model. We currently don't have a type for this, and

> On Dec 13, 2016, at 12:56 PM, Reid Kleckner <rnk at google.com> wrote: > > Given that LLVM has so many auto-registration systems (cl::opt, target registry, pass registry, statistics, I'm sure there's more), maybe we should spend the time to build an auto-registration system that doesn't involve static constructors? I would volunteer to do the work, however this

Hello Vic, I don't have a lot to add myself. I think that majority of the input needs to come from the OS stakeholders. My main concern is if it requires work on every platform to take advantage or avoid regressions then perhaps it is worth adding as an option rather than changing the default. Some questions: - Does this need work in every OS for correctness of programs? For example you

?Hi, I found a new issue in lld (https://llvm.org/bugs/show_bug.cgi?id=26222), but after review of outputs internals still have no idea why that can happen. Do you have any thoughts about possible reasons of that ? I am going to continue investigating that tomorrow. Best regards, George. -------------- next part -------------- An HTML attachment was scrubbed... URL:

Hey all, TL;DR: Moving RELRO segment to be immediately after read-only segment so that the dynamic linker has the option to merge the two virtual memory areas at run time. This is an RFC for moving RELRO segment. Currently, lld orders ELF sections in the following order: R, RX, RWX, RW, and RW contains RELRO. At run time, after RELRO is write-protected, we'd have VMAs in the order of: R, RX,

Hello, all experts. When I use pid provider, my Dscript with -F option output the codepath with flowindent as you know, e.g. -> main -> f1 -> f2 however I realized that the exec file I used at that time was stripped. Does anyone know the reason why I could see the function names? Thanks in advance. -- This message posted from opensolaris.org