Summary: When implementing MCFillFragment, use the size of the fragment,
rather than the size of the section.
Patch by Dan Gohman
Differential Revision: https://reviews.llvm.org/D35090
llvm-svn: 307565
Model weakly defined symbols as symbols that are both
exports and imported and marked as weak. Local references
to the symbols refer to the import but the linker can
resolve this to the weak export if not strong symbol
is found at link time.
Differential Revision: https://reviews.llvm.org/D35029
llvm-svn: 307348
Previously we were generating a void(void) function type
for a weak alias. Update the weak-alias test case to
catch this.
Differential Revision: https://reviews.llvm.org/D34734
llvm-svn: 307194
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
- Use auto where appropriate
- Use early return to reduce nesting
- Remove stray comment line
- Use C++ foreach over explicit iterator
Differential Revision: https://reviews.llvm.org/D34477
llvm-svn: 305971
The lld-x86_64-darwin13 is failing with:
error: unused function 'operator<<'
Wrap the declation in ifndef NDEBUG, which matches
what is done in MipsELFObjectWriter.cpp.
Differential Revision: https://reviews.llvm.org/D34384
llvm-svn: 305771
This fixes two build failures that only occur in certain
configurations:
- error: unused function 'operator<<'
- error: control reaches end of non-void function
Differential Revision: https://reviews.llvm.org/D34382
llvm-svn: 305770
This ensures that symbolic relocations are generated for stack
pointer manipulations.
These relocations are of type R_WEBASSEMBLY_GLOBAL_INDEX_LEB.
This change also adds support for reading relocations of this
type in WasmObjectFile.cpp.
Since its a globally imported symbol this does mean that
the get_global/set_global instruction won't be valid until
the objects are linked that global used in no longer an
imported global.
Differential Revision: https://reviews.llvm.org/D34172
llvm-svn: 305616
Previously we were writing the value function index space
value but for these types of relocations we want to be
writing the table element index space value.
Add a test case for these relocation types that fails
without this change.
Differential Revision: https://reviews.llvm.org/D33962
llvm-svn: 305253
This creates a new library called BinaryFormat that has all of
the headers from llvm/Support containing structure and layout
definitions for various types of binary formats like dwarf, coff,
elf, etc as well as the code for identifying a file from its
magic.
Differential Revision: https://reviews.llvm.org/D33843
llvm-svn: 304864
The change cleans up and unifies the handling of relocation
entries in WasmObjectWriter. Type index relocation no longer
need to be handled separately.
The only externally visible change should be that type
index relocations are no longer grouped at the end.
Differential Revision: https://reviews.llvm.org/D33918
llvm-svn: 304816
These methods looks like they were originally came from
MCELFObjectTargetWriter but they are never called by the
WasmObjectWriter.
Remove these methods meant the declaration of WasmRelocationEntry
could also move into the cpp file.
Differential Revision: https://reviews.llvm.org/D33905
llvm-svn: 304804
The size of this function was getting a little out of.
control. Split code for writing each section type into
seperate functions.
Differential Revision: https://reviews.llvm.org/D33792
llvm-svn: 304634
Undefined externals don't need to have a size or an offset.
This was broken by r303915. Added a test for this case.
This fixes the "Compile LLVM Torture (o)" step on the wasm
waterfall.
Differential Revision: https://reviews.llvm.org/D33803
llvm-svn: 304505
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
Also, add test for data relocations and fix addend to
be signed.
Subscribers: jfb, dschuff
Differential Revision: https://reviews.llvm.org/D32513
llvm-svn: 301690
Add support for the new relocations and linking metadata section support in
https://github.com/WebAssembly/tool-conventions/blob/master/Linking.md. In
particular, this allows LLVM to indicate which variable is the stack pointer,
so that it can be linked with other objects.
This also adds support for emitting type relocations for call_indirect
instructions.
Right now, this is mainly tested by using wabt and hexdump to examine the
output on selected testcases. We'll add more tests as the design stablizes
and more of the pieces are in place.
llvm-svn: 299141
This fix is a follow up a previous change with stored
value types as signed integers in memory.
In future, once the yaml<->wasm binary patche lands we
can add test coverage for this kind of thing.
Differential Revision: https://reviews.llvm.org/D31227
Patch by Sam Clegg
llvm-svn: 298612
A recent change switch the in-memory wasm value types
to be signed integers, but I missing a few cases where
these were being writing to the binary.
Differential Revision: https://reviews.llvm.org/D31014
Patch by Sam Clegg
llvm-svn: 297991
This change updates to the format of the 'names' sectionin the
generated wasm binary to match the latest changesto the design
and 'wabt'.
Differential Revision: https://reviews.llvm.org/D30950
Patch by Sam Clegg
llvm-svn: 297877
Previously we were using the encoded LEB hex values
for the value types. This change uses the decoded
negative value and the LEB encoder to write them out.
Differential Revision: https://reviews.llvm.org/D30847
Patch by Sam Clegg
llvm-svn: 297777
With the "wasm32-unknown-unknown-wasm" triple, this allows writing out
simple wasm object files, and is another step in a larger series toward
migrating from ELF to general wasm object support. Note that this code
and the binary format itself is still experimental.
llvm-svn: 296190
This just adds the basic skeleton for supporting a new object file format.
All of the actual encoding will be implemented in followup patches.
Differential Revision: https://reviews.llvm.org/D26722
llvm-svn: 295803
Rafael Espindola