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139 Commits

Author SHA1 Message Date
Rafael Espindola 7757224466 Add static initialization/finalization array support. 
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
Hal Finkel d26da9258f [ELF2] Fix mixed-Endian handling in DynamicSection<ELFT>::writeTo 
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
Rui Ueyama 8c205d5394 ELF2: Merge duplicates using lambdas. NFC. 
llvm-svn: 249118
 2015-10-02 01:33:31 +00:00
Michael J. Spencer 52bf0ebfdf [lld][elf2] Sort output sections. 
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
Rui Ueyama 7de3f3719a ELF2: Add -soname option. 
llvm-svn: 249058
 2015-10-01 19:36:04 +00:00
Rafael Espindola c8b158155c Copy DT_SONAME to DT_NEEDED. 
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
Rui Ueyama 2dfd74f758 ELF2: Add DT_REL{,A}ENT and DT_SYMENT. 
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
Rui Ueyama c55733e79c ELF2: Advance the buffer pointers right after we use them. 
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
Rui Ueyama b189b5c535 Make template instantiation code a bit shorter. NFC. 
llvm-svn: 248866
 2015-09-30 00:43:22 +00:00
Rui Ueyama 8ddfa812af ELF2: Split SymbolTableSection<ELFT>::writeTo into two smaller functions. 
Also added brief comments.

llvm-svn: 248864
 2015-09-30 00:32:10 +00:00
Rafael Espindola 3ef3a4c9ff Start adding support for static programs using dynamic libraries. 
This is just enough for a hello world using a dynamic glibc.

llvm-svn: 248854
 2015-09-29 23:22:16 +00:00
Rafael Espindola 6a78fd5f41 This reverts commit r248845 and r248848. 
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
Michael J. Spencer a0abcfd8e7 [elf2] Fix build. 
llvm-svn: 248848
 2015-09-29 23:12:50 +00:00
Michael J. Spencer fe07bd67fd [elf2] Sort output sections. 
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
Rafael Espindola 2732235508 Try to fix gcc warning 
llvm-svn: 248749
 2015-09-28 22:12:54 +00:00
Rafael Espindola 5f19f1224c Delete dead code. 
llvm-svn: 248747
 2015-09-28 22:07:52 +00:00
Rafael Espindola dfc7200b18 Add support for local absolute symbols. 
llvm-svn: 248726
 2015-09-28 18:29:47 +00:00
Davide Italiano 6993ba4d3e [ELF2] Don't inline function and define it in OutputSection.cpp. NFC. 
Reported/Requested by: Rafael Espindola

llvm-svn: 248643
 2015-09-26 00:47:56 +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 cd076f0113 Move more logic to getSymVA to avoid code duplication. 
llvm-svn: 248599
 2015-09-25 18:19:03 +00:00
Rafael Espindola 25b0acb57e Move variables closer to use. NFC. 
llvm-svn: 248590
 2015-09-25 17:32:37 +00:00
Rafael Espindola 35c6af3c9c Move a few methods out of line. NFC. 
llvm-svn: 248586
 2015-09-25 17:19:10 +00:00
Davide Italiano 85121bbf24 [ELF2] Use static non-member function when it suffices. 
Pointed out by Rui Ueyama.

llvm-svn: 248559
 2015-09-25 03:56:11 +00:00
Rafael Espindola e1901cc33d Simplify memory management by having ELFData contain a ELFObj. 
llvm-svn: 248502
 2015-09-24 15:11:50 +00:00
Davide Italiano d75d3b94fd [ELF2] Add support for -discard-none. 
Differential Revision:	http://reviews.llvm.org/D13083

llvm-svn: 248499
 2015-09-24 15:08:23 +00:00
Rafael Espindola c2d211994d Create the .bss section early so that we don't have to set it after the fact. 
llvm-svn: 248412
 2015-09-23 18:25:05 +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 7f07442bb6 Move the last remaining hard coded relocations to Target. 
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
Rafael Espindola 01205f79a4 Start adding target abstractions. 
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
Rafael Espindola 50534c2b6f Fix the creation of Elf_Rel sections. 
We were always incrementing the output buffer pointer by sizeof(Elf_Rela).

llvm-svn: 248303
 2015-09-22 17:49:38 +00:00
Rafael Espindola 454ca1c245 Use a signed value for Delta. 
This fixes got.s on 32 bit windows.

Patch by Igor Kudrin!

llvm-svn: 248289
 2015-09-22 17:08:25 +00:00
Denis Protivensky 67d01489b8 [ELF2] Fix gcc build 
Remove explicit qualification in template instantiation.

llvm-svn: 248249
 2015-09-22 08:14:46 +00:00
Rafael Espindola 7167585c94 Remove the Chunk terminology from ELF. 
llvm-svn: 248229
 2015-09-22 00:16:19 +00:00
Rafael Espindola 56f965ff5c More MSVC fixes. 
llvm-svn: 248223
 2015-09-21 22:48:12 +00:00
Rafael Espindola f68b707251 Trying to fix the MSVC build. 
llvm-svn: 248219
 2015-09-21 22:21:46 +00:00
Rafael Espindola 327b8e19b1 Remove unused includes. 
llvm-svn: 248218
 2015-09-21 22:14:55 +00:00
Rafael Espindola 4ea00210f2 Make InputSection able to relocate itself. 
This matches the organization used in COFF.

llvm-svn: 248215
 2015-09-21 22:01:00 +00:00
Rafael Espindola 5805c4f509 Move OutputSectionBase and derived classes out of Writer.cpp. 
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