diff options
| author | Peter Collingbourne <peter@pcc.me.uk> | 2017-10-27 17:49:40 +0000 |
|---|---|---|
| committer | Peter Collingbourne <peter@pcc.me.uk> | 2017-10-27 17:49:40 +0000 |
| commit | 2b556e9b1771ba888781b257c16372b3e4209701 (patch) | |
| tree | d9e400424ada197c520cdd7c379cccb1c341e00e /tools/llvm-readobj | |
| parent | 1110171c8f724aa27a866a60c9b602f4cb6a9327 (diff) | |
ELF: Add support for emitting dynamic relocations in the Android relocation packing format.
The Android relocation packing format is a more compact
format for dynamic relocations in executables and DSOs
that is based on delta encoding and SLEBs. An overview
of the format can be found in the Android source code:
https://android.googlesource.com/platform/bionic/+/refs/heads/master/tools/relocation_packer/src/delta_encoder.h
This patch implements relocation packing using that format.
This implementation uses a more intelligent algorithm for compressing
relative relocations than Android's own relocation packer. As a
result it can generally create smaller relocation sections than
that packer. If I link Chromium for Android targeting ARM32 I get a
.rel.dyn of size 174693 bytes, as compared to 371832 bytes with gold
and the Android packer.
Differential Revision: https://reviews.llvm.org/D39152
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@316775 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'tools/llvm-readobj')
| -rw-r--r-- | tools/llvm-readobj/ELFDumper.cpp | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/tools/llvm-readobj/ELFDumper.cpp b/tools/llvm-readobj/ELFDumper.cpp index 27fa99cb9b8..0224df8493f 100644 --- a/tools/llvm-readobj/ELFDumper.cpp +++ b/tools/llvm-readobj/ELFDumper.cpp @@ -1513,6 +1513,10 @@ static const char *getTypeString(unsigned Arch, uint64_t Type) { } } switch (Type) { + LLVM_READOBJ_TYPE_CASE(ANDROID_REL); + LLVM_READOBJ_TYPE_CASE(ANDROID_RELSZ); + LLVM_READOBJ_TYPE_CASE(ANDROID_RELA); + LLVM_READOBJ_TYPE_CASE(ANDROID_RELASZ); LLVM_READOBJ_TYPE_CASE(BIND_NOW); LLVM_READOBJ_TYPE_CASE(DEBUG); LLVM_READOBJ_TYPE_CASE(FINI); @@ -1715,6 +1719,8 @@ void ELFDumper<ELFT>::printValue(uint64_t Type, uint64_t Value) { case DT_INIT_ARRAYSZ: case DT_FINI_ARRAYSZ: case DT_PREINIT_ARRAYSZ: + case DT_ANDROID_RELSZ: + case DT_ANDROID_RELASZ: OS << Value << " (bytes)"; break; case DT_NEEDED: |