Commit Graph

22 Commits

Author SHA1 Message Date
Sam Clegg d177ab2a5f [WebAssembly] Add support for debug (DWARF) sections
Specifically add support for custom sections that contain
relocations, and for the two new relocation types needed
by DWARF sections.

See: https://reviews.llvm.org/D44184

Patch by Yury Delendik!

Differential Revision: https://reviews.llvm.org/D44184

llvm-svn: 331566
2018-05-04 23:14:42 +00:00
Sam Clegg 80ba43872e [WebAssembly] Add support for custom sections
Copy user-defined custom sections into the output, concatenating
sections with the same name.

Differential Revision: https://reviews.llvm.org/D45340

llvm-svn: 329717
2018-04-10 16:12:49 +00:00
Rui Ueyama ac95bb1d52 [WebAssembly] Remove another trivial accessor.
Differential Revision: https://reviews.llvm.org/D43725

llvm-svn: 329336
2018-04-05 19:37:31 +00:00
Nicholas Wilson dbd90bf8d1 [WebAssembly] Run clang-format. NFC
llvm-svn: 326896
2018-03-07 13:28:16 +00:00
Rui Ueyama 22c8f33a9b [WebAssembly] Return a StringRef instead of std::string from getSectionName(). NFC.
Differential Revision: https://reviews.llvm.org/D43854

llvm-svn: 326337
2018-02-28 17:33:04 +00:00
Rui Ueyama 4a1b2bbc88 [WebAssembly] Do not use inheritance to define SubSection.
SubSection inherited from SyntheticSection, and SyntheticSection inherits
from OutputSection, so SubSection was an OutputSection. But that's wrong
because SubSection is not actually a WebAssembly output section.
It shares some functionalities with OutputSection, but overall it's very
different.

This patch removes that inheritance.

Differential Revision: https://reviews.llvm.org/D43719

llvm-svn: 326286
2018-02-28 00:52:42 +00:00
Rui Ueyama 319eb8b3c3 [WebAssembly] Remove redundant local variables.
Differential Revision: https://reviews.llvm.org/D43709

llvm-svn: 326280
2018-02-28 00:31:16 +00:00
Sam Clegg 3141ddc58d Consistent (non) use of empty lines in include blocks
The profailing style in lld seem to be to not include such empty lines.
Clang-tidy/clang-format seem to handle this just fine.

Differential Revision: https://reviews.llvm.org/D43528

llvm-svn: 325629
2018-02-20 21:53:18 +00:00
Rui Ueyama bf450d905d Do not create a temporary data structure for relocations.
This patch removes `OutRelocations` vector from the InputChunk and
directly consume `Relocations` vector instead. This should make the linker
faster because we don't create a temporary data structure, and it matches
the lld's design principle that we don't create temporary data structures
for object files but instead directly consume mmap'ed data whenever possible.

Differential Revision: https://reviews.llvm.org/D43491

llvm-svn: 325549
2018-02-20 04:26:26 +00:00
Rui Ueyama 1184253891 Refactor wasm/WriterUtil.{cpp,h}.
Summary:
 - Makes code more in line with LLVM style (e.g. const char * -> StringRef)
 - Do not use formatv since we can construct message just by `+`
 - Replace some odd types such as `const StringRef` with more common type
 - Do not use default arguments if they are not necessary

Reviewers: sbc100

Subscribers: jfb, aheejin, llvm-commits, sunfish

Differential Revision: https://reviews.llvm.org/D43403

llvm-svn: 325383
2018-02-16 20:38:00 +00:00
Sam Clegg d96d93576b [WebAssembly] Move relocation handling InputChunks.cpp
Teach each input chunk how to write itself and apply its
own relocations.

Differential Revision: https://reviews.llvm.org/D41891

llvm-svn: 322212
2018-01-10 19:22:42 +00:00
Sam Clegg 5fa274bea4 [WebAssembly] Add InputChunk as common base class for InputSegment and InputFunction. NFC.
Differential Revision: https://reviews.llvm.org/D41419

llvm-svn: 322148
2018-01-10 01:13:34 +00:00
Sam Clegg 8d146bbc0c [WebAssembly] Output functions individually
The code section is now written out one function
at a time rather than all the functions in a given
objects being serialized at once.

This change lays the groundwork for supporting
--gc-sections.

Differential Revision: https://reviews.llvm.org/D41315

llvm-svn: 322138
2018-01-09 23:56:44 +00:00
Sam Clegg 87e61923a4 [WebAssembly] Write out undefined symbol addresses as zero
The addresses of undefined symbols that make it into the final
executable (i.e. weak references to non-existent symbols) should
resolve to zero.

Also, make sure to not include function in the indirect function
table if they are not included in the output.

Differential Revision: https://reviews.llvm.org/D41839

llvm-svn: 322045
2018-01-08 23:39:11 +00:00
Sam Clegg ab2ac29066 [WebAssembly] Improve toString(OutputSection). NFC.
llvm-svn: 321146
2017-12-20 05:14:48 +00:00
Sam Clegg 5e8cba9e39 [WebAssembly] Apply data relocations in parallel. NFC.
Store data relocations with their respective segment.
This allows relocations to be applied as each segment
is written (and therefore in parallel).

Differential Revision: https://reviews.llvm.org/D41410

llvm-svn: 321105
2017-12-19 20:45:15 +00:00
Sam Clegg 0d0dd39159 [WebAssembly] Add support for writing out init functions in linking section
This change add support for init functions in the linking
section, but only in -r/--relocatable mode.

Differential Revision: https://reviews.llvm.org/D41375

llvm-svn: 321088
2017-12-19 17:09:45 +00:00
Sam Clegg ca16b73692 [WebAssebmly] Fix the single clang-format issue in `wasm` directory
llvm-svn: 321020
2017-12-18 20:20:24 +00:00
Sam Clegg 0fb6faa0be Prefer `ArrayRef` over `const std::vector&`
Differential Revision: https://reviews.llvm.org/D40993

llvm-svn: 320125
2017-12-08 01:09:21 +00:00
Sam Clegg 74fe0ba105 [WebAssembly] Fix symbol exports under -r/--relocatable
This change cleans up the way wasm exports and globals
are generated, particualrly for -r/--relocatable where
globals need to be created and exported in order for
output relocations which reference them.

Remove the need for a per file GlobalIndexOffset and
instead set the output index for each symbol directly.
This simplifies the code in several places.

Differential Revision: https://reviews.llvm.org/D40859

llvm-svn: 320001
2017-12-07 01:51:24 +00:00
Rui Ueyama 2017d52b54 Move Memory.{h,cpp} to Common.
Differential Revision: https://reviews.llvm.org/D40571

llvm-svn: 319221
2017-11-28 20:39:17 +00:00
Sam Clegg c94d393ad5 [WebAssembly] Initial wasm linker implementation
This linker backend is still a work in progress but is
enough to link simple programs including linking against
library archives.

Differential Revision: https://reviews.llvm.org/D34851

llvm-svn: 318539
2017-11-17 18:14:09 +00:00