[all-commits] [llvm/llvm-project] ab58e4: [lld][WebAssembly] Add suppport for PIC + passive ...

[Sam Clegg via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: ab58e4cb5185cc2042f3e1c077c85430b83c28b5
      https://github.com/llvm/llvm-project/commit/ab58e4cb5185cc2042f3e1c077c85430b83c28b5
  Author: Sam Clegg <sbc at chromium.org>
  Date:   2020-12-04 (Fri, 04 Dec 2020)

  Changed paths:
    M lld/test/lit.cfg.py
    M lld/test/wasm/data-segments.ll
    M lld/wasm/Driver.cpp
    M lld/wasm/SyntheticSections.cpp
    M lld/wasm/Writer.cpp
    M llvm/include/llvm/BinaryFormat/Wasm.h

  Log Message:
  -----------
  [lld][WebAssembly] Add suppport for PIC + passive data initialization

This change improves our support for shared memory to include
PIC executables (and shared libraries).

To handle this case the linker-generated `__wasm_init_memory`
function (that only exists in shared memory builds) must be
capable of loading memory segements at non-const offsets based
on the runtime value of `__memory_base`.

Differential Revision: https://reviews.llvm.org/D92620