97aad172b8
[ELF2] -z now option implemented
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When generating an executable or shared library, mark it to tell the dynamic linker to resolve all symbols when the program is started, or when the shared library is linked to using dlopen, instead of deferring function call resolution to the point when the function is first called.
Differential Revision: http://reviews.llvm.org/D13468
llvm-svn: 249551
2015-10-07 15:00:21 +00:00
92aa1c02df
[ELF2] Fix gcc build error
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llvm-svn: 249524
2015-10-07 08:21:34 +00:00
cea0b3b45d
Don't create dynamic relocations for weak undefined symbols.
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llvm-svn: 249520
2015-10-07 04:22:55 +00:00
e782f673a8
Skip entries handled by the dynamic linker.
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We were writing got entries in the first positions, not in the positions
corresponding to locally defined symbols.
llvm-svn: 249518
2015-10-07 03:56:05 +00:00
52dca345db
Create simpler dynamic relocations for local symbols in got.
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If the symbol is not preemptable, we can use a R_X86_64_RELATIVE.
llvm-svn: 249496
2015-10-07 00:58:20 +00:00
3378526f34
Fix typo.
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llvm-svn: 249488
2015-10-07 00:15:43 +00:00
a662738e02
Don't create dynamic relocations when its known what the got points to.
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llvm-svn: 249485
2015-10-06 23:56:53 +00:00
c39c75dee4
[ELF2] Implement --{enable, disable}-new-dtags options.
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llvm-svn: 249428
2015-10-06 16:20:00 +00:00
8614c566e2
Handle strong undefined symbols fetching members after a weak undefined.
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This is a case that requires --start-group --end-group with regular ELF
linkers. Fortunately it is still possible to handle it with lazy symbols without
taking a second look at archives.
Thanks to Michael Spencer for the bug report.
llvm-svn: 249406
2015-10-06 14:33:58 +00:00
6f4bd532d3
Rearrange a bit for clarity. NFC.
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llvm-svn: 249404
2015-10-06 14:17:53 +00:00
03ab3368a0
External symbols need a full dynamic reloc, not R_X86_64_RELATIVE.
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We were already doing the right thing if the symbol was seen in a shared
library, but not if it was completely missing.
llvm-svn: 249397
2015-10-06 12:39:58 +00:00
41127ad7af
Fix R_X86_64_RELATIVE for local symbols that refer to other sections.
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We were mixing up the relocated and target sections.
llvm-svn: 249360
2015-10-05 22:49:16 +00:00
9c3e4d2af5
Handle a common symbol needing a R_X86_64_RELATIVE.
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llvm-svn: 249357
2015-10-05 21:23:08 +00:00
3c83e2bbfb
Include existing addend when computing R_X86_64_RELATIVE.
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llvm-svn: 249353
2015-10-05 21:09:37 +00:00
ae24400424
Create R_X86_64_RELATIVE when needed.
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The dynamic relocation code needs refactoring, but it is probably better
to do it with this test passing.
llvm-svn: 249340
2015-10-05 19:30:12 +00:00
d1cf421bd5
Don't copy STT_SECTION from the inputs.
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This matches the behavior of gold and bfd ld.
llvm-svn: 249326
2015-10-05 16:25:43 +00:00
024c84c77c
Remove an extra blank line.
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llvm-svn: 249324
2015-10-05 16:05:18 +00:00
4f674ed138
Include hidden and internal symbols in the regular symbol table.
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This matches the behavior of bfd ld and gold. It is also convenient for
testing other changes.
llvm-svn: 249323
2015-10-05 15:24:04 +00:00
b1f2b51a89
[ELF2] Add DT_INIT and DT_FINI dynamic table entries
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The entries are added if there are "_init" or "_fini" entries in
the symbol table respectively. According to the behavior of ld,
entries are inserted even for undefined symbols.
Symbol names can be overridden by using -init and -fini command
line switches. If used, these switches neither add new symbol table
entries nor require those symbols to be resolved.
Differential Revision: http://reviews.llvm.org/D13385
llvm-svn: 249297
2015-10-05 10:29:46 +00:00
7757224466
Add static initialization/finalization array support.
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This adds entries in the dynamic table for .init_array, .fini_array and
.preinit_array.
llvm-svn: 249175
2015-10-02 19:37:55 +00:00
d26da9258f
[ELF2] Fix mixed-Endian handling in DynamicSection<ELFT>::writeTo
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Using the "raw" Elf64_Dyn or Elf32_Dyn structures in
DynamicSection<ELFT>::writeTo does not correctly handle mixed-Endian
situations. Instead, use the corresponding llvm::object::* structures which
have Endian-converting members (like the rest of the code).
This fixes all currently-failing elf2 tests when running on big-Endian
PPC64/Linux (I've added a big-Endian test case which should fail on
little-Endian machines in the same way that test/elf2/shared.s failed on
big-Endian machines prior to this change).
llvm-svn: 249150
2015-10-02 16:21:30 +00:00
8c205d5394
ELF2: Merge duplicates using lambdas. NFC.
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llvm-svn: 249118
2015-10-02 01:33:31 +00:00
52bf0ebfdf
[lld][elf2] Sort output sections.
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Sort by:
ALLOC
ALLOC && NOBITS
ALLOC & EXEC
ALLOC & EXEC && NOBITS
ALLOC & WRITE
ALLOC & WRITE && NOBITS
<nothing> (ignoring NOBITS)
The dynamic section is finalized early because it adds strings to the dynamic string table, which comes before the dynamic table.
llvm-svn: 249071
2015-10-01 21:15:02 +00:00
7de3f3719a
ELF2: Add -soname option.
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llvm-svn: 249058
2015-10-01 19:36:04 +00:00
c8b158155c
Copy DT_SONAME to DT_NEEDED.
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If a shared library has a DT_SONAME entry, that is what should be included
in the DT_NEEDED of a program using it.
We don't implement -soname yet, so check in a .so for now.
llvm-svn: 249025
2015-10-01 15:47:50 +00:00
2dfd74f758
ELF2: Add DT_REL{,A}ENT and DT_SYMENT.
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According to the ELF specification, these dynamic array entries are mandatory.
http://reviews.llvm.org/D13303
llvm-svn: 248952
2015-09-30 21:57:53 +00:00
c55733e79c
ELF2: Advance the buffer pointers right after we use them.
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So that it is clear that we are incrementing the pointers for sure. NFC.
llvm-svn: 248868
2015-09-30 00:54:29 +00:00
b189b5c535
Make template instantiation code a bit shorter. NFC.
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llvm-svn: 248866
2015-09-30 00:43:22 +00:00
8ddfa812af
ELF2: Split SymbolTableSection<ELFT>::writeTo into two smaller functions.
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Also added brief comments.
llvm-svn: 248864
2015-09-30 00:32:10 +00:00
3ef3a4c9ff
Start adding support for static programs using dynamic libraries.
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This is just enough for a hello world using a dynamic glibc.
llvm-svn: 248854
2015-09-29 23:22:16 +00:00
6a78fd5f41
This reverts commit r248845 and r248848.
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They broke elf2/basic-mips.s.
Revert "[elf2] Sort output sections."
Revert "[elf2] Fix build."
llvm-svn: 248851
2015-09-29 23:19:25 +00:00
a0abcfd8e7
[elf2] Fix build.
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llvm-svn: 248848
2015-09-29 23:12:50 +00:00
fe07bd67fd
[elf2] Sort output sections.
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Sort by:
ALLOC
ALLOC && NOBITS
ALLOC & EXEC
ALLOC & EXEC && NOBITS
ALLOC & WRITE
ALLOC & WRITE && NOBITS
<nothing> (ignoring NOBITS)
The dynamic section is finalized early because it adds strings to the dynamic string table, which comes before the dynamic table.
llvm-svn: 248845
2015-09-29 23:05:40 +00:00
2732235508
Try to fix gcc warning
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llvm-svn: 248749
2015-09-28 22:12:54 +00:00
5f19f1224c
Delete dead code.
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llvm-svn: 248747
2015-09-28 22:07:52 +00:00
dfc7200b18
Add support for local absolute symbols.
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llvm-svn: 248726
2015-09-28 18:29:47 +00:00
6993ba4d3e
[ELF2] Don't inline function and define it in OutputSection.cpp. NFC.
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Reported/Requested by: Rafael Espindola
llvm-svn: 248643
2015-09-26 00:47:56 +00:00
0e604f913a
Add support for creating the symbols __init_array_start and __init_array_end.
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llvm-svn: 248604
2015-09-25 18:56:53 +00:00
cd076f0113
Move more logic to getSymVA to avoid code duplication.
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llvm-svn: 248599
2015-09-25 18:19:03 +00:00
25b0acb57e
Move variables closer to use. NFC.
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llvm-svn: 248590
2015-09-25 17:32:37 +00:00
35c6af3c9c
Move a few methods out of line. NFC.
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llvm-svn: 248586
2015-09-25 17:19:10 +00:00
85121bbf24
[ELF2] Use static non-member function when it suffices.
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Pointed out by Rui Ueyama.
llvm-svn: 248559
2015-09-25 03:56:11 +00:00
e1901cc33d
Simplify memory management by having ELFData contain a ELFObj.
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llvm-svn: 248502
2015-09-24 15:11:50 +00:00
d75d3b94fd
[ELF2] Add support for -discard-none.
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Differential Revision: http://reviews.llvm.org/D13083
llvm-svn: 248499
2015-09-24 15:08:23 +00:00
c2d211994d
Create the .bss section early so that we don't have to set it after the fact.
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llvm-svn: 248412
2015-09-23 18:25:05 +00:00
2812aa82d0
[elf2] Pass BSSSec to the relocation handling code differently. Don't store it in the symbol.
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llvm-svn: 248393
2015-09-23 16:57:31 +00:00
05a3dd2cba
Implement --export-dynamic.
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llvm-svn: 248347
2015-09-22 23:38:23 +00:00
7f07442bb6
Move the last remaining hard coded relocations to Target.
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Unfortunately the i386 and x86_64 relocation have the same numerical value
and it is a probably a bit much to add got support for another architecture
just to test this.
llvm-svn: 248326
2015-09-22 21:35:51 +00:00
01205f79a4
Start adding target abstractions.
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This is just enough to get PLT working on 32 bit x86.
The idea behind using a virtual interface is that it should be easy to
convert any of the functions to template parameters if any turns out to be
performance critical.
llvm-svn: 248308
2015-09-22 18:19:46 +00:00
50534c2b6f
Fix the creation of Elf_Rel sections.
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We were always incrementing the output buffer pointer by sizeof(Elf_Rela).
llvm-svn: 248303
2015-09-22 17:49:38 +00:00
454ca1c245
Use a signed value for Delta.
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This fixes got.s on 32 bit windows.
Patch by Igor Kudrin!
llvm-svn: 248289
2015-09-22 17:08:25 +00:00
67d01489b8
[ELF2] Fix gcc build
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Remove explicit qualification in template instantiation.
llvm-svn: 248249
2015-09-22 08:14:46 +00:00
7167585c94
Remove the Chunk terminology from ELF.
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llvm-svn: 248229
2015-09-22 00:16:19 +00:00
56f965ff5c
More MSVC fixes.
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llvm-svn: 248223
2015-09-21 22:48:12 +00:00
f68b707251
Trying to fix the MSVC build.
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llvm-svn: 248219
2015-09-21 22:21:46 +00:00
327b8e19b1
Remove unused includes.
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llvm-svn: 248218
2015-09-21 22:14:55 +00:00
4ea00210f2
Make InputSection able to relocate itself.
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This matches the organization used in COFF.
llvm-svn: 248215
2015-09-21 22:01:00 +00:00
5805c4f509
Move OutputSectionBase and derived classes out of Writer.cpp.
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The file was getting a bit too big and OutputSection is a central enough
concept in ELF linking to justify its own file.
llvm-svn: 248214
2015-09-21 21:38:08 +00:00
George Rimar