maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity
209,629 Commits 23 Branches 0 Tags 2.2 GiB
Commit Graph

78 Commits

Author SHA1 Message Date
Michael J. Spencer 1b3fffa6e0 [elf2] Add 32S and 64 relocations (needed for musl). 
It wasn't obvious what the assembly was to generate these relocations, so I did the test with yaml.

llvm-svn: 246902
 2015-09-05 00:36:03 +00:00
Michael J. Spencer baae538cc6 [elf2] Correctly handle sections with an alignment of 0. Spec says to treat it as an alignment of 1. 
llvm-svn: 246901
 2015-09-05 00:25:33 +00:00
Michael J. Spencer f832541066 [elf2] Fix include order. 
llvm-svn: 246892
 2015-09-04 22:48:30 +00:00
Michael J. Spencer 1b348a68e5 [elf2] Add basic archive file support. 
llvm-svn: 246886
 2015-09-04 22:28:10 +00:00
Davide Italiano ad6c81c628 [ELF2] Writer: Fold variables, use setVisibility(). NFCI. 
llvm-svn: 246861
 2015-09-04 19:42:14 +00:00
Rafael Espindola f98d6d84cd Start adding support for shared libraries. 
This just adds the types and enough support to detect incompatibilities among
shared libraries and object files.

llvm-svn: 246797
 2015-09-03 20:03:54 +00:00
Rafael Espindola 8aeb13fec1 Add a helper function for getting the first object file. 
Also preparation for shared objects. It will become the first ELF file.

llvm-svn: 246796
 2015-09-03 19:13:13 +00:00
Rafael Espindola 222edc66d6 Make ObjectFiles private. NFC. 
Just preparation for adding support for shared libraries.

llvm-svn: 246793
 2015-09-03 18:56:20 +00:00
Rafael Espindola 78471f0ec1 Merge visibility from all symbols with the same name. 
The ELF spec says:

... if any reference to or definition of a name is a symbol with a
non-default visibility attribute, the visibility attribute must be
propagated to the resolving symbol in the linked object. If different
visibility attributes are specified for distinct references to or
definitions of a symbol, the most constraining visibility attribute
must be propagated to the resolving symbol in the linked object. The
attributes, ordered from least to most constraining, are:
STV_PROTECTED, STV_HIDDEN and STV_INTERNAL.

llvm-svn: 246603
 2015-09-01 23:12:52 +00:00
Rafael Espindola ee1364f7f6 Don't leave unused strings in the string table. 
llvm-svn: 246593
 2015-09-01 21:47:21 +00:00
Rafael Espindola 5b3942f54a Don't include hidden or internal symbols in the symbol table. 
llvm-svn: 246583
 2015-09-01 20:36:51 +00:00
Rafael Espindola 7f37775e56 Every symbol now has an Elf_Sym. Simplify. NFC. 
llvm-svn: 246581
 2015-09-01 20:30:52 +00:00
Rafael Espindola 06c3a6d676 Start recording st_other (i.e. visibility). 
llvm-svn: 246577
 2015-09-01 19:42:38 +00:00
Rafael Espindola f31f9617ca Remember the maximum alignment used to refer to a common symbol. 
llvm-svn: 246517
 2015-09-01 01:19:12 +00:00
Rafael Espindola b56cb9437f Sort common symbols by alignment. 
llvm-svn: 246511
 2015-09-01 00:16:38 +00:00
Rafael Espindola ce8c9c0548 Set the correct value for the common symbols. 
In the relocatable object it is the alignment, but in the linked file it is
a regular address.

llvm-svn: 246505
 2015-08-31 22:55:21 +00:00
Rafael Espindola 8b09d68447 Assign common symbols to the .bss output section. 
llvm-svn: 246503
 2015-08-31 22:33:21 +00:00
Rafael Espindola 0518574a73 Start allocating space for common symbols. 
llvm-svn: 246496
 2015-08-31 22:07:18 +00:00
Rafael Espindola 058f343246 Don't allocate space for SHT_NOBITS sections. 
llvm-svn: 246480
 2015-08-31 20:23:57 +00:00
Rafael Espindola f7d45f0869 Delete SyntheticUndefined. 
Now that resolved is templated anyway, we can use the regular Undefined.

llvm-svn: 246407
 2015-08-31 01:46:20 +00:00
Rafael Espindola 30e1797b38 Turn resolution.s into an exhaustive testcase. 
Now that we print a symbol table and all symbol kinds are at least declared,
we can test all combinations that don't produce an error.

This also includes a few fixes to keep the test passing:

* Keep the strong symbol in a weak X strong pair
* Handle common symbols.

The common X common case will be finished in a followup patch.

llvm-svn: 246401
 2015-08-30 23:17:30 +00:00
Davide Italiano 94f183a696 [ELFv2] Implement R_X86_64_32 relocation. 
Differential Revision:	http://reviews.llvm.org/D12436

llvm-svn: 246362
 2015-08-29 13:15:42 +00:00
Rafael Espindola 51d4690b6e Start adding support for common symbols. 
For now this just recognizes the special section number.

llvm-svn: 246332
 2015-08-28 21:26:51 +00:00
Rafael Espindola 3a63f3fb22 Add support for weak absolute symbols. 
On ELF being weak is independent of what we call the kind of the symbol. So
this also makes the code simpler.

llvm-svn: 246326
 2015-08-28 20:19:34 +00:00
Rafael Espindola 871765c321 Make sure we output symbols in the same order on 32 and 64 bit builds. 
llvm-svn: 246264
 2015-08-28 02:46:41 +00:00
Michael J. Spencer 67bc8d6b3f [elf2] Add basic relocation support for x86-64. 
This currently doesn't handle local symbols.

Differential Revision: http://reviews.llvm.org/D11612

llvm-svn: 246234
 2015-08-27 23:15:56 +00:00
Rafael Espindola 0e0c1901c9 Start adding support for absolute symbols. 
llvm-svn: 246147
 2015-08-27 12:40:06 +00:00
Rafael Espindola e11c6d2d6f Set the symbol size in the symbol table. 
llvm-svn: 246086
 2015-08-26 21:46:24 +00:00
Rafael Espindola 034e2e7a8e Define types close to use. NFC. 
llvm-svn: 246085
 2015-08-26 21:42:36 +00:00
Rafael Espindola f3837074cc Set the symbol value in the symbol table. 
llvm-svn: 245943
 2015-08-25 15:53:17 +00:00
Rafael Espindola 832b93f219 Start recording the section of symbols in the symbol table. 
Support for more than 64 K sections to follow shortly.

llvm-svn: 245868
 2015-08-24 20:06:32 +00:00
Rafael Espindola e6f52102a3 Remove a duplicated member variable. NFC. 
This just makes it clear that, for now, there is only one symbol table.

llvm-svn: 245844
 2015-08-24 14:48:18 +00:00
Rafael Espindola 1bd885aba4 ELF: Also record the type of undefined symbols. 
Tested with a weak undefined. Testing with a plain undefined will have to wait
for support for -shared.

llvm-svn: 245069
 2015-08-14 16:46:28 +00:00
Rafael Espindola bd481b8f89 Fix the build with gcc. 
llvm-svn: 245060
 2015-08-14 15:20:34 +00:00
Rafael Espindola c44d17ad45 Add the type of the symbols to the symbol table. 
For now only defined symbols are covered. I will add undefined ones in the
next patch.

llvm-svn: 245057
 2015-08-14 15:10:49 +00:00
Rafael Espindola 383c323d4d ELF: Set the correct symbol binding. 
llvm-svn: 245049
 2015-08-14 13:52:36 +00:00
Rafael Espindola 62b81b875a Start populating the symbol table. 
With this patch only the name is set. I will set the other fields shortly.

For now the table doesn't include local symbols. This is equivalent to using
--discard-all with gnu ld. This is OK for now since the symbols are not
needed for execution and for testing symbol resolution we only need the
global symbols.

llvm-svn: 245044
 2015-08-14 13:07:05 +00:00
Rui Ueyama 8050d32b13 ELF2: Rename a function to make it the same as the COFF's counterpart. 
llvm-svn: 245030
 2015-08-14 05:17:30 +00:00
Rafael Espindola f763ca3c9c ELF: Create a symbol table. 
For now it is empty. I will add the symbols in a followup patch.

llvm-svn: 245008
 2015-08-14 02:42:20 +00:00
Rafael Espindola 83b0dc6392 ELF: Drop the Chunk base class. 
With OutputSection being a virtual interface, each concrete OutputSection
handles only one type of chunk and we don't need a base Chunk class.

So for we have a class that handles input sections and one that handles
the string table, but this extends naturally for other outputs (symbol table,
merging of SHF_MERGE sections, etc.).

llvm-svn: 244972
 2015-08-13 22:21:37 +00:00
Rafael Espindola ebd2108215 Make OutputSection virtual and use that for creating the string table. 
We were creating the string table in a completely ad hoc way. Now the
string table is an output section and gets its output offset set just like
any other section.

This opens the way for other linker created sections like the symbol table.

llvm-svn: 244969
 2015-08-13 22:14:37 +00:00
Rafael Espindola 2db634d8f1 Correctly align output sections. 
They don't need to be aligned to page boundaries. Only segments need that.

llvm-svn: 244942
 2015-08-13 20:24:18 +00:00
Rafael Espindola 0160a281c2 Record the alignment of the output sections. 
llvm-svn: 244941
 2015-08-13 20:13:39 +00:00
Rafael Espindola ea133eaa39 Delete dead code. 
llvm-svn: 244938
 2015-08-13 19:00:23 +00:00
Rafael Espindola a175eb6ca6 Template OutputSection only over Is64Bit. 
This is a bit more c++ code, but:
* It is less machine code: lld's text is 44688 bytes smaller.
* It should be a bit more efficient in the non native endian case.
* It should be a bit more efficient on architectures with slow unaligned access.

llvm-svn: 244934
 2015-08-13 18:37:23 +00:00
Rafael Espindola 184d94e009 Define trivial methods inline. NFC. 
llvm-svn: 244930
 2015-08-13 18:25:47 +00:00
Rafael Espindola 64e888ba5f Set the file offset of zero sized sections. 
There is no reason not to do it and this matches what gold and bfd ld do.

llvm-svn: 244929
 2015-08-13 18:23:43 +00:00
Rafael Espindola 29e8d343e4 Rename addSectionChunk to addChunk now that it can handle any Chunk. 
llvm-svn: 244919
 2015-08-13 17:35:13 +00:00
Rafael Espindola 375a508234 Pass the type and flags to the OutputSection constructor. NFC. 
This will allow further cleanups.

llvm-svn: 244918
 2015-08-13 17:32:30 +00:00
Rafael Espindola a7471795ae Take name, type and flags in consideration when concatenating sections. 
This is mandated by the ELF spec.

llvm-svn: 244911
 2015-08-13 17:04:50 +00:00