[llvm-dev] Default linker script used by lld

[Peter Smith via llvm-dev]

LLD, doesn't have a built-in linker script in the same way as GNU ld.bfd does.

Input Sections are mapped to OutputSections via a simple function https://github.com/llvm/llvm-project/blob/main/lld/ELF/Writer.cpp#L98 then sections are sorted according to rank in https://github.com/llvm/llvm-project/blob/main/lld/ELF/Writer.cpp#L98 hopefully the comments in those files will help reverse engineer a script that looks similar.

In practice the default linker behaviour will most significantly differ from ld.bfd by sorting ro-data before ro-code rather than after. This tends towards 3 PT_LOAD program headers ro, ro+exec, rw.

Hope that helps

Peter

From: llvm-dev <llvm-dev-bounces at lists.llvm.org> On Behalf Of jingduanyang via llvm-dev
Sent: 25 October 2021 12:54
To: llvm-dev at lists.llvm.org
Cc: Weiwei (weiwei, Compiler) <weiwei64 at huawei.com>; Zhangwen(Esan) <zwzhangwen.zhang at huawei.com>
Subject: [llvm-dev] Default linker script used by lld

Hi,

Does anyone know the default linker script used by lld? This might be a silly question but I googled everywhere and couldn't find an answer...

Thanks,
Duanyang
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