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48 Commits

Author SHA1 Message Date
Rui Ueyama 294b136db4 Remove `explicit` from constructors that take more than one parameter. 
llvm-svn: 248873
 2015-09-30 02:06:17 +00:00
Rafael Espindola 84aff152d9 Simplify enumeration definition. 
Thanks to Rui for the suggestion.

llvm-svn: 248615
 2015-09-25 21:20:23 +00:00
Rafael Espindola 0e604f913a Add support for creating the symbols __init_array_start and __init_array_end. 
llvm-svn: 248604
 2015-09-25 18:56:53 +00:00
Rafael Espindola 5b197f0620 Fix the typedef. 
Thanks to David Blaikie for noticing.

llvm-svn: 248602
 2015-09-25 18:32:09 +00:00
Rafael Espindola 38af127c6a Fix the parent class of SharedSymbol. 
It is a defined symbol according to classof. Found by inspection.

llvm-svn: 248573
 2015-09-25 15:34:03 +00:00
Rafael Espindola d27adc42e6 Add support for the _GLOBAL_OFFSET_TABLE_ symbol. 
llvm-svn: 248490
 2015-09-24 13:34:01 +00:00
Michael J. Spencer 2812aa82d0 [elf2] Pass BSSSec to the relocation handling code differently. Don't store it in the symbol. 
llvm-svn: 248393
 2015-09-23 16:57:31 +00:00
Rafael Espindola 05a3dd2cba Implement --export-dynamic. 
llvm-svn: 248347
 2015-09-22 23:38:23 +00:00
Rafael Espindola 7167585c94 Remove the Chunk terminology from ELF. 
llvm-svn: 248229
 2015-09-22 00:16:19 +00:00
Rafael Espindola 9d06ab6ded Rename Chunks.(h|cpp) to InputSection.(h|cpp). NFC. 
llvm-svn: 248226
 2015-09-22 00:01:39 +00:00
Rafael Espindola 53d5cea648 Rename SectionChunk to InputSection. 
This is more consistent with OutputSection. This is also part of removing
the "Chunk" term from the ELF linker, since we just have input/output sections
and program headers.

llvm-svn: 248183
 2015-09-21 17:47:00 +00:00
Rafael Espindola eb79273158 Start adding support for PLT. 
For now this doesn't support lazy symbol resolution, but is enough to link
and run a program with

jmp foo@PLT

llvm-svn: 248165
 2015-09-21 15:11:29 +00:00
Michael J. Spencer 658dccd1c8 [elf2] Relocate against common symbols. 
llvm-svn: 248054
 2015-09-18 22:13:25 +00:00
Rafael Espindola 5c2310c30c Start adding support for creating the GOT. 
With this a program can call into a shared library with

  jmp *foo@GOTPCREL(%rip)

llvm-svn: 247992
 2015-09-18 14:40:19 +00:00
Rafael Espindola 19e3889dba Start creating dynamic relocations. 
For now we don't create got/plt and only Elf_Rela is supported.

llvm-svn: 247811
 2015-09-16 15:54:15 +00:00
Rafael Espindola 37ecff14f4 Remove redundant "protected:". 
llvm-svn: 247797
 2015-09-16 13:47:45 +00:00
Rafael Espindola 18173d420e Start adding support for symbols in shared libraries. 
llvm-svn: 247019
 2015-09-08 15:50:05 +00:00
Michael J. Spencer 1b348a68e5 [elf2] Add basic archive file support. 
llvm-svn: 246886
 2015-09-04 22:28:10 +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 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 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 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 daa92a6193 Keep the largest common symbol. 
This requires templating some functions over ELFT, but that opens other cleanup
opportunities for future patches.

llvm-svn: 246405
 2015-08-31 01:16:19 +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
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
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 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 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 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 457c940835 Delete dead code. 
llvm-svn: 245056
 2015-08-14 14:58:57 +00:00
Rafael Espindola 3bf356ee9c Remove unused default values. 
llvm-svn: 245053
 2015-08-14 14:38:44 +00:00
Rafael Espindola beee25e484 Make these headers as being c++. 
llvm-svn: 245050
 2015-08-14 14:12:54 +00:00
Rui Ueyama 4f89fdad9f ELF2: Make Defined{Regular,Weak} ctors look the same as other SymbolBody ctors. 
llvm-svn: 244701
 2015-08-11 23:37:25 +00:00
Rafael Espindola 76e24ea955 Add support for weak undefined symbols. 
llvm-svn: 244640
 2015-08-11 17:57:05 +00:00
Rafael Espindola 791e9f9c59 Remove unused templating. 
llvm-svn: 244639
 2015-08-11 17:51:57 +00:00
Rafael Espindola b13df6582a Add support for weak symbols. 
llvm-svn: 244636
 2015-08-11 17:33:02 +00:00
Rafael Espindola ae1b23bd61 Use real values for DefindeFirst and DefinedLast. 
With this clang notices that switches are fully covered.

llvm-svn: 244632
 2015-08-11 17:10:02 +00:00
Rafael Espindola 9247f165ff Delete unused typedef. 
llvm-svn: 244628
 2015-08-11 16:55:28 +00:00
Rafael Espindola df1e05a26c Delete broken code. 
This was using a hard coded string table and getting it for every symbol.

The symbol name was already available.

llvm-svn: 244220
 2015-08-06 15:33:21 +00:00
Rafael Espindola e3335d8a66 Delete dead code. 
llvm-svn: 244040
 2015-08-05 13:26:54 +00:00
Michael J. Spencer cdae0a4e2d [ELF2] Devirtualize SymbolBody. 
llvm-svn: 243496
 2015-07-28 22:58:25 +00:00
Rui Ueyama fdbbcdad87 ELF2: Inline very small functions. 
llvm-svn: 243323
 2015-07-27 20:39:04 +00:00
Rui Ueyama a7ccb2926f ELF2: Devirtualize SymbolBody::compare. NFC. 
This is to make it consistent with COFF.

llvm-svn: 243321
 2015-07-27 20:39:01 +00:00
Michael J. Spencer 84487f1174 [ELF2] Add a new ELF linker based on the new PE/COFF linker. 
Differential Revision: http://reviews.llvm.org/D11188

llvm-svn: 243161
 2015-07-24 21:03:07 +00:00
Michael J. Spencer bae540e945 Revert ELF port. Posting to mailing list. 
llvm-svn: 242118
 2015-07-14 04:49:48 +00:00
Michael J. Spencer 8a4145411f Initial ELF port. 
This is a direct port of the new PE/COFF linker to ELF.

It can take a single object file and generate a valid executable that executes at the first byte in the text section.

llvm-svn: 242088
 2015-07-13 23:48:06 +00:00