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
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
1b348a68e5
[elf2] Add basic archive file support.
...
llvm-svn: 246886
2015-09-04 22:28:10 +00:00
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
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
ee1364f7f6
Don't leave unused strings in the string table.
...
llvm-svn: 246593
2015-09-01 21:47:21 +00:00
5b3942f54a
Don't include hidden or internal symbols in the symbol table.
...
llvm-svn: 246583
2015-09-01 20:36:51 +00:00
06c3a6d676
Start recording st_other (i.e. visibility).
...
llvm-svn: 246577
2015-09-01 19:42:38 +00:00
f31f9617ca
Remember the maximum alignment used to refer to a common symbol.
...
llvm-svn: 246517
2015-09-01 01:19:12 +00:00
b56cb9437f
Sort common symbols by alignment.
...
llvm-svn: 246511
2015-09-01 00:16:38 +00:00
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
8b09d68447
Assign common symbols to the .bss output section.
...
llvm-svn: 246503
2015-08-31 22:33:21 +00:00
0518574a73
Start allocating space for common symbols.
...
llvm-svn: 246496
2015-08-31 22:07:18 +00:00
058f343246
Don't allocate space for SHT_NOBITS sections.
...
llvm-svn: 246480
2015-08-31 20:23:57 +00:00
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
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
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
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
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
ad5ca2245e
Remove irrelevant parts of the test.
...
llvm-svn: 246265
2015-08-28 02:53:05 +00:00
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
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
0e0c1901c9
Start adding support for absolute symbols.
...
llvm-svn: 246147
2015-08-27 12:40:06 +00:00
e11c6d2d6f
Set the symbol size in the symbol table.
...
llvm-svn: 246086
2015-08-26 21:46:24 +00:00
f3837074cc
Set the symbol value in the symbol table.
...
llvm-svn: 245943
2015-08-25 15:53:17 +00:00
5cd113df01
Diagnose symbols with invalid section indexes.
...
llvm-svn: 245884
2015-08-24 22:00:25 +00:00
2034822981
Add support for reading files with more than 0xff00 sections.
...
llvm-svn: 245880
2015-08-24 21:43:25 +00:00
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
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
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
383c323d4d
ELF: Set the correct symbol binding.
...
llvm-svn: 245049
2015-08-14 13:52:36 +00:00
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
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
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
0160a281c2
Record the alignment of the output sections.
...
llvm-svn: 244941
2015-08-13 20:13:39 +00:00
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
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
ef1ac01c2e
Don't give an address to sections that are not allocated.
...
llvm-svn: 244900
2015-08-13 15:31:17 +00:00
abad6186c3
Place SHF_ALLOC sections first in the output.
...
Having them in the middle of the file complicates the creation of segments.
llvm-svn: 244898
2015-08-13 15:23:46 +00:00
cde251370a
Include non-alloca sections in the link.
...
llvm-svn: 244895
2015-08-13 14:45:44 +00:00
91009b3856
Fix the alignment of the section headers.
...
Thanks a lot to Rui for noticing it.
llvm-svn: 244711
2015-08-12 01:45:28 +00:00
6b83b90b6a
ELF: Create a string table.
...
For now only the sections are in it, but it already makes the output easier
to read and test.
llvm-svn: 244702
2015-08-12 00:00:24 +00:00
76e24ea955
Add support for weak undefined symbols.
...
llvm-svn: 244640
2015-08-11 17:57:05 +00:00
b13df6582a
Add support for weak symbols.
...
llvm-svn: 244636
2015-08-11 17:33:02 +00:00
7c388187c9
Don't report a conflict between two local symbols.
...
llvm-svn: 244624
2015-08-11 16:30:34 +00:00
525d0bf0b9
On freebsd it is possible to open a directory. Test with another error.
...
llvm-svn: 244249
2015-08-06 19:12:03 +00:00
08c1df6a45
Bring test back but don't check the filesytem dependent error.
...
llvm-svn: 244218
2015-08-06 15:18:59 +00:00
3b8018069e
For completeness, add a 64 bit big endian test.
...
llvm-svn: 244183
2015-08-06 00:00:50 +00:00
1c2f64d1a6
Add a big endian testcase.
...
llvm-svn: 244173
2015-08-05 23:40:20 +00:00
4b7c2fc64e
Add bare minimum to get a working i386 linux program.
...
llvm-svn: 244050
2015-08-05 15:08:40 +00:00
Michael J. Spencer