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12 Commits

Author SHA1 Message Date
Sam Clegg 0fc5599f52 [WebAssembly] Use bitfield types in wasm YAML representation 
Differential Revision: https://reviews.llvm.org/D41202

llvm-svn: 320642
 2017-12-13 22:02:25 +00:00
Sam Clegg 63ebb81386 [WebAssembly] Allow each data segment to specify its own alignment 
Also, add a flags field as we will almost certainly
be needing that soon too.

Differential Revision: https://reviews.llvm.org/D38296

llvm-svn: 314534
 2017-09-29 16:50:08 +00:00
Sam Clegg 31a2c80935 [WebAssembly] Add support for local symbol bindings 
Differential Revision: https://reviews.llvm.org/D38096

llvm-svn: 313817
 2017-09-20 21:17:04 +00:00
Sam Clegg d95ed959d8 Reland "[WebAssembly] Add support for naming wasm data segments" 
Add adds support for naming data segments.  This is useful
useful linkers so that they can merge similar sections.

Differential Revision: https://reviews.llvm.org/D37886

llvm-svn: 313795
 2017-09-20 19:03:35 +00:00
Mike Edwards b487bf45f0 Reverting due to Green Dragon bot failure. 
http://green.lab.llvm.org/green/job/clang-stage1-cmake-RA-incremental/42594/

llvm-svn: 313706
 2017-09-20 01:21:02 +00:00
Sam Clegg b292c25966 [WebAssembly] Add support for naming wasm data segments 
Add adds support for naming data segments.  This is useful
useful linkers so that they can merge similar sections.

Differential Revision: https://reviews.llvm.org/D37886

llvm-svn: 313692
 2017-09-19 23:00:57 +00:00
Sam Clegg 7c39594357 [WebAssembly] Use a separate wasm data segment for each global symbol 
This is stepping stone towards honoring -fdata-sections
and letting the assembler decide how many wasm data
segments to create.

Differential Revision: https://reviews.llvm.org/D37834

llvm-svn: 313313
 2017-09-14 23:07:53 +00:00
Sam Clegg e7a60708ff [WebAssembly] Only treat imports/exports as symbols when reading relocatable object files 
This change only treats imported and exports functions and globals
as symbol table entries the object has a "linking" section (i.e. it is
relocatable object file).

In this case all globals must be of type I32 and initialized with
i32.const.  This was previously being assumed but not checked for and
was causing a failure on big endian machines due to using the wrong
value of then union.

See: https://bugs.llvm.org/show_bug.cgi?id=34487

Differential Revision: https://reviews.llvm.org/D37497

llvm-svn: 312674
 2017-09-06 22:05:41 +00:00
Sam Clegg 13a2e89926 [WebAssembly] Update relocation names to match spec 
Summary: See https://github.com/WebAssembly/tool-conventions/blob/master/Linking.md

Differential Revision: https://reviews.llvm.org/D37385

llvm-svn: 312342
 2017-09-01 17:32:01 +00:00
Sam Clegg 9c07f94a1f [WebAssembly] Expose the offset of each data segment 
Summary:
This allows tools like lld that process relocations
to apply data relocation correctly. This information
is required because relocation are stored as section
offset.

Subscribers: jfb, dschuff, jgravelle-google, aheejin

Differential Revision: https://reviews.llvm.org/D35234

llvm-svn: 307741
 2017-07-12 00:24:54 +00:00
Sam Clegg 9e1ade93a8 [WebAssembly] Add data size and alignement to linking section 
The overal size of the data section (including BSS)
is otherwise not included in the wasm binary.

Differential Revision: https://reviews.llvm.org/D34657

llvm-svn: 306459
 2017-06-27 20:27:59 +00:00
Sam Clegg 1c154a6107 [WebAssembly] MC: Include unnamed data when writing wasm files 
Also, include global entries for all data symbols, not
just external ones, since these are referenced by the
relocation records.

Add a test case that includes unnamed data.

Differential Revision: https://reviews.llvm.org/D33079

llvm-svn: 303915
 2017-05-25 21:08:07 +00:00