3c83e2bbfb
Include existing addend when computing R_X86_64_RELATIVE.
...
llvm-svn: 249353
2015-10-05 21:09:37 +00:00
d75fbd221d
Make this test a bit more strict.
...
Before the ADDR variables could match the empty string.
llvm-svn: 249350
2015-10-05 20:54:39 +00:00
ae24400424
Create R_X86_64_RELATIVE when needed.
...
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.
...
This matches the behavior of gold and bfd ld.
llvm-svn: 249326
2015-10-05 16:25:43 +00:00
4f674ed138
Include hidden and internal symbols in the regular symbol table.
...
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
...
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
22220d5d5f
[ELF2] Add --undefined option
...
Add symbol specified with -u as undefined which may cause additional
object files from archives to be linked into the resulting binary.
Differential Revision: http://reviews.llvm.org/D13345
llvm-svn: 249295
2015-10-05 09:43:57 +00:00
b00e523d00
[ELF2/AArch64] R_AARCH64_ABS{16,32} can fail.
...
Add tests to ensure we handle this case this case gracefully.
llvm-svn: 249255
2015-10-04 01:08:58 +00:00
df88f968e3
[ELF2/AArch64] Add support for AARCH64_ABS{16,32,64} relocations.
...
I saw these in the wild while trying to link shared libraries.
llvm-svn: 249254
2015-10-04 00:59:16 +00:00
0b6974bfe0
[ELF/AArch64] Support R_AARCH64_ADR_PREL_PG_H121 relocation.
...
llvm-svn: 249246
2015-10-03 19:56:07 +00:00
7744d9a201
[elf2] Remove unused flag in test.
...
llvm-svn: 249204
2015-10-02 22:39:35 +00:00
1f31a2c11c
[ELF2/AArch64] Add support for R_AARCH64_ADR_PREL_PG_H121
...
llvm-svn: 249195
2015-10-02 22:00:42 +00:00
ed3476b79f
[elf2] Add STB_GNU_UNIQUE support.
...
llvm-svn: 249193
2015-10-02 21:57:52 +00:00
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
58d7ee397d
[ELF2] Simplify test from r249150
...
As Rafael pointed out, we don't need quite so many flags on the llvm-readobj
RUN line here.
llvm-svn: 249162
2015-10-02 17:57:29 +00:00
b2a5cafb37
Weak undefined symbols should not fetch archive members.
...
llvm-svn: 249160
2015-10-02 17:41:22 +00:00
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
98efd89e7e
Use ld.lld2 as a argv[0] alias.
...
The reason for the name is so that we can run
./build/bin/clang -fuse-ld=lld2 test.o -o t
llvm-svn: 249122
2015-10-02 12:57:34 +00:00
5d41326751
Still define __init_array_(start|end) if there is no .init_array.
...
This matches the behavior of other linkers and seems necessary to link
in some older systems.
llvm-svn: 249077
2015-10-01 21:22:26 +00:00
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
3e60379fd9
Don't crash on files with no symbol table.
...
Thanks to Roman Divacky for the test.
llvm-svn: 249066
2015-10-01 20:26:37 +00:00
57e40deb8d
[ELF2] Implement --no-undefined flag.
...
llvm-svn: 249064
2015-10-01 20:14:45 +00:00
ff1dcc59d9
Make the test a bit stronger.
...
This shows that it is really DT_SONAME that is used to detect dups.
llvm-svn: 249062
2015-10-01 20:04:31 +00:00
6a3b5ded8a
Don't include shared libraries multiple times.
...
llvm-svn: 249061
2015-10-01 19:52:48 +00:00
b9287b1fba
ELF2: Use -soname to create a test .so file. Remove the .so binary from repository.
...
llvm-svn: 249059
2015-10-01 19:39:02 +00:00
7de3f3719a
ELF2: Add -soname option.
...
llvm-svn: 249058
2015-10-01 19:36:04 +00:00
2696bbeb93
[ELF2] Add --[no-]whole-archive command line switches
...
Summary:
If --whole-archive is used, all symbols from the following archives are added to the output. --no-whole-archive restores default behavior. These switches can be used multiple times.
NB. We have to keep an ArchiveFile instance within SymbolTable even if --whole-archive mode is active since it can be a thin archive which contains just names of external files. In that case actual memory buffers for the archive members will be stored within the File member of ArchiveFile class.
Reviewers: rafael, ruiu
Subscribers: grimar, llvm-commits
Projects: #lld
Differential Revision: http://reviews.llvm.org/D13286
llvm-svn: 249045
2015-10-01 18:02:21 +00:00
47d4f9496c
Remove trailing whitespaces.
...
llvm-svn: 249037
2015-10-01 17:33:36 +00:00
ee05828261
[ELF2] Implement --allow-shlib-undefined as default behavior.
...
We ignore --{no,}allow-shlib-undefined options and always allow undefined
symbols if we are building a DSO.
llvm-svn: 249036
2015-10-01 17:24:24 +00:00
d912ee9595
[ELF2] Add -Bstatic and -Bdynamic command line switches
...
Summary:
These switches affect library searching for '-l' which follow them. Synonym forms are also supported:
* -dy and -call_shared for -Bdynamic switch
* -dn, -non_shared and -static for -Bstatic switch
Reviewers: rafael, ruiu
Subscribers: emaste, llvm-commits
Projects: #lld
Differential Revision: http://reviews.llvm.org/D13238
llvm-svn: 249029
2015-10-01 16:42:03 +00:00
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
bd35d75e42
ELF2: Linker scripts can refer other linker scripts. Test that.
...
This did not work before r249023.
llvm-svn: 249024
2015-10-01 15:45:41 +00:00
819f7127c0
ELF2: Move tests for linker script from basic.s to linkerscript.s.
...
llvm-svn: 248961
2015-09-30 23:15:35 +00:00
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
c02fcafef6
[ELF2] Expand test comment a little bit, use reloc name as section name.
...
llvm-svn: 248930
2015-09-30 19:44:30 +00:00
bf506b7d48
ELF2: LinkerScript: Handle quoted tokens.
...
llvm-svn: 248919
2015-09-30 17:15:29 +00:00
f5c4aca98f
ELF2: Add basic linker script support.
...
This linker script parser and evaluator is powerful enough to read
Linux's libc.so, which is (despite its name) a linker script that
contains OUTPUT_FORMAT, GROUP and AS_NEEDED directives.
The parser implemented in this patch is a recursive-descendent one.
It does *not* construct an AST but consumes directives in place and
sets the results to Symtab object, like what Driver is doing.
This should be very fast since less objects are allocated, and
this is also more readable.
http://reviews.llvm.org/D13232
llvm-svn: 248918
2015-09-30 17:06:09 +00:00
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
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
85bbe0c46b
Remove the dependency to 'test' command.
...
llvm-svn: 248849
2015-09-29 23:13:40 +00:00
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
511631975d
ELF2: Make default-output.s test idempotent.
...
This test failed if being run more than once because of the
remaining file of the last run.
llvm-svn: 248843
2015-09-29 22:57:22 +00:00
a7e628ff10
ELF2: Unbreak buildbot.
...
Subshell didn't work on Windows.
llvm-svn: 248840
2015-09-29 22:46:52 +00:00
4eed0114c5
ELF2: Use 'a.out' as default output file name.
...
llvm-svn: 248831
2015-09-29 21:49:40 +00:00
2d73648667
Update test to use invalid elf file in archives.
...
The code in driver is about to change so that the invalid files would no
longer be seen as ELF.
This makes sure that the error path will remain tested.
llvm-svn: 248820
2015-09-29 18:44:18 +00:00
9d4c6d771b
[ELF2] Implemented --entry flag.
...
Patch from George Rimar!
llvm-svn: 248806
2015-09-29 16:40:13 +00:00
8acb95c7ab
Add support for R_386_GOT32.
...
llvm-svn: 248799
2015-09-29 14:42:37 +00:00
be901e2dbc
Don't apply a relocation if we create a dynamic reloc.
...
With RELA that is just wasteful, with REL the relocation gets applied
twice.
llvm-svn: 248795
2015-09-29 13:51:43 +00:00
6d7fcdb518
Add R_386_GOTPC support.
...
llvm-svn: 248793
2015-09-29 13:36:32 +00:00
49829a1bfe
[ELF2] Add initial MIPS support
...
Besides a trivial MIPS support the patch introduces new TargetInfo class
member getDefaultEntry() to override default name of the entry symbol.
MIPS uses __start for that.
Differential Revision: http://reviews.llvm.org/D13227
llvm-svn: 248779
2015-09-29 05:34:03 +00:00
4b2ca85c1a
Implement --allow-multiple-definition.
...
Patch by George Rimar!
llvm-svn: 248733
2015-09-28 20:30:11 +00:00
085a8f5ea7
Don't include fully resolved relocations in the dynamic relocation table.
...
llvm-svn: 248731
2015-09-28 20:18:40 +00:00
46e01554b1
Add support for got/ptl referring to symbols defined in .o files.
...
llvm-svn: 248730
2015-09-28 19:48:34 +00:00
dfc7200b18
Add support for local absolute symbols.
...
llvm-svn: 248726
2015-09-28 18:29:47 +00:00
c5e22d906b
ELF2: Include file names in error messages.
...
llvm-svn: 248724
2015-09-28 18:20:41 +00:00
1309fc0378
[ELF2] Add --sysroot command line switch
...
Reviewers: rafael, ruiu
Subscribers: llvm-commits
Projects: #lld
Differential Revision: http://reviews.llvm.org/D13209
llvm-svn: 248715
2015-09-28 15:01:59 +00:00
abb7b28686
Add support for -L and -l command line switches.
...
Patch by Igor Kudrin!
llvm-svn: 248708
2015-09-28 12:52:21 +00:00
83af95d927
Enable the aarch64 tests.
...
llvm-svn: 248707
2015-09-28 12:22:25 +00:00
1d750a6fc3
[ELF2/AArch64] Support for R_AARCH64_ADR_PREL_LO21 relocation.
...
llvm-svn: 248679
2015-09-27 08:45:38 +00:00
00eecb88a4
lld/test/elf2/basic-aarch64.s should not REQUIRE x86.
...
FIXME: The feature "arm64" is not activated in lit.cfg.
llvm-svn: 248664
2015-09-26 09:21:58 +00:00
f096e10a47
[ELF2] Spell llvm-readobj correctly.
...
llvm-svn: 248642
2015-09-26 00:43:49 +00:00
cde9336717
[ELF2] Add initial AArch64 support.
...
Differential Revision: http://reviews.llvm.org/D13167
llvm-svn: 248641
2015-09-26 00:32:04 +00:00
551dfd8818
Implement --noinhibit-exec.
...
Patch by George Rimar!
llvm-svn: 248605
2015-09-25 19:24:57 +00:00
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
eeb22f8251
ELF2: Support reponse files.
...
http://reviews.llvm.org/D13148
llvm-svn: 248575
2015-09-25 15:37:33 +00:00
aa7c533ec3
[ELF2] Fix binaries so they actually run on FreeBSD.
...
Since FreeBSD 4.1, the kernel expects binaries to be marked with
ELFOSABI_FREEBSD in the ELF header to exec() them. LLD unconditionally
sets OSABI to ELF_OSABINONE, and everything linked with it won't run
on FreeBSD (unless explicitly rebranded).
Example:
% ./aarch64-hello
ELF binary type "0" not known.
zsh: exec format error: ./aarch64-hello
FreeBSD could be modified to accept ELF_OSABINONE, but that would break all
existing binaries, so the kernel needs to support both ABINONE and ABIFREEBSD.
I plan to push this change in FreeBSD one day, which, unfortunately, is
not today. This code patches lld so it sets the header field correctly.
For completeness, the rationale of this change is explained in the FreeBSD
commit message, and it's apparently to pleasee binutils maintainers at the time.
https://svnweb.freebsd.org/base?view=revision&revision=59342
Differential Revision: http://reviews.llvm.org/D13140
llvm-svn: 248554
2015-09-25 01:59:13 +00:00
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
e0f09fac78
Add a test covering ELFFile's constructor failing.
...
llvm-svn: 248498
2015-09-24 14:55:25 +00:00
d27adc42e6
Add support for the _GLOBAL_OFFSET_TABLE_ symbol.
...
llvm-svn: 248490
2015-09-24 13:34:01 +00:00
cdfecffd80
Add support for relocating R_X86_64_GOTPCREL.
...
llvm-svn: 248425
2015-09-23 20:08:25 +00:00
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
6173f848b9
Print more information about undefined symbols.
...
llvm-svn: 248382
2015-09-23 14:37:01 +00:00
8e5560d894
Don't complain about symbols showing up in multible shared libraries.
...
llvm-svn: 248381
2015-09-23 14:23:59 +00:00
1a49e58181
Print more information about duplicated symbols.
...
llvm-svn: 248380
2015-09-23 14:10:24 +00:00
a89d178a4f
[ELF2] Add ASCII representation of the string table to test.
...
Requested by: rafael
llvm-svn: 248361
2015-09-23 01:56:26 +00:00
1ab429bf49
Fix a last minuted edit that should not have been committed.
...
Sorry about that.
llvm-svn: 248349
2015-09-22 23:42:55 +00:00
05a3dd2cba
Implement --export-dynamic.
...
llvm-svn: 248347
2015-09-22 23:38:23 +00:00
3efa4e982e
Add a token ppc64 reloc just to have a test showing that we handle BE.
...
llvm-svn: 248321
2015-09-22 21:12:55 +00:00
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
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
a794fd44a1
Add support for R_386_PC32.
...
llvm-svn: 248275
2015-09-22 13:47:45 +00:00
21585757e6
Handle implicit addends in Elf_Rel.
...
llvm-svn: 248272
2015-09-22 13:35:00 +00:00
8ca741d51d
[ELF2] Support relocs for local symbols
...
Differential Revision: http://reviews.llvm.org/D12978
llvm-svn: 248196
2015-09-21 19:30:11 +00:00
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
5445b2de50
[ELF2] Implement support for -discard-locals.
...
This is not on by default, but it may make sense to change it in future.
llvm-svn: 248133
2015-09-20 21:58:12 +00:00
acf5bdfd88
[elf2] Improve relocation-undefined-weak.s test.
...
llvm-svn: 248071
2015-09-19 00:15:38 +00:00
9779535c5d
[elf2] Relocate against undefined weak symbols.
...
llvm-svn: 248056
2015-09-18 22:26:13 +00:00
658dccd1c8
[elf2] Relocate against common symbols.
...
llvm-svn: 248054
2015-09-18 22:13:25 +00:00
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
b5b47b432b
[ELF2] Fill up local symbols fields correctly.
...
Differential Revision: http://reviews.llvm.org/D12944
llvm-svn: 247960
2015-09-18 01:08:17 +00:00
879b597b9d
[elf2] Extend program-header-layout.s to check that read only sections are correctly merged into the first PT_LOAD.
...
llvm-svn: 247947
2015-09-17 21:19:56 +00:00
55f56320c7
[elf2] Fix dynamic-reloc.s test.
...
The offset of the .rela.dyn section isn't the same between hosts because a path comes before it. This test doesn't care what the offset is.
llvm-svn: 247946
2015-09-17 21:13:41 +00:00
2f0082424f
[elf2] Combine adjacent compatible OutputSections in PT_LOADs.
...
llvm-svn: 247925
2015-09-17 19:58:07 +00:00
40102eb27f
Use a MapVector to output symbols in a deterministic order.
...
We used to sort the symbols at the very end, but we need to know the order
earlier so that we can create reference to them in the dynamic relocations.
Thanks to Igor Kudrin for pointing out the problem.
llvm-svn: 247911
2015-09-17 18:26:25 +00:00
67a5da60ed
Add support of Elf_Rel dynamic relocations.
...
llvm-svn: 247888
2015-09-17 14:02:10 +00:00
eade07ba59
Start adding support for Elf_Rel.
...
I don't intend to add full i686 support right now, just make sure we have all
the infrastructure in place for it.
llvm-svn: 247858
2015-09-16 21:57:07 +00:00
6d328d3841
[ELF2] Initial support for local symbols.
...
Symbol table is now populated correctly, but some fields are missing,
they'll be added in the future. This patch also adds --discard-all
flag, which was the default behavior until now.
Differential Revision: http://reviews.llvm.org/D12874
llvm-svn: 247849
2015-09-16 20:45:57 +00:00
6569522f4b
Relax the test to fix some bots.
...
The string table contains a file path, so addresses and offsets can be
different on some setups.
llvm-svn: 247839
2015-09-16 19:48:57 +00:00
2b92d8f184
Move code computing NumEntries to finalize.
...
When DynamicSection is constructed we still don't know if there will be
any dynamic relocations or not.
llvm-svn: 247838
2015-09-16 19:26:31 +00:00
3887ebfc21
Add DT_RELA and DT_RELASZ to the dynamic table.
...
llvm-svn: 247837
2015-09-16 18:52:42 +00:00
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
72373fb5b7
Fix test to actually test something.
...
llvm-svn: 247790
2015-09-16 12:50:32 +00:00
141dd91ac5
[elf2] Simplify overflow checks.
...
llvm-svn: 247768
2015-09-16 02:02:04 +00:00
75e5fda3de
[elf2] Add R_X86_64_32S.
...
llvm-svn: 247758
2015-09-16 00:24:19 +00:00
dff84070da
[elf2] Add error checking for the R_X86_64_32 relocation.
...
llvm-svn: 247745
2015-09-15 23:36:30 +00:00
3c1ac0a17a
[elf2] Relocate absolute symbols.
...
llvm-svn: 247738
2015-09-15 23:12:02 +00:00
a5c97d9025
Add support for R_X86_64_64.
...
llvm-svn: 247688
2015-09-15 13:52:06 +00:00
d1062bbd89
Make this test a bit more robust in preparation to adding more cases.
...
The first test (call) is now the only test to use .text, which makes it
resistant to more tests being added.
llvm-objdump -d already prints the addresses of symbols. We can use that in the
tests.
llvm-svn: 247685
2015-09-15 13:30:08 +00:00
80faee82e6
Add content to the .hash section.
...
This also sets DT_HASH.
With this simple shared libraries created by lld can be loaded by the dynamic
linker.
llvm-svn: 247625
2015-09-14 22:08:55 +00:00
601771ebc0
Start adding the .hash output section.
...
It is still empty. Content will be added in the next patch.
llvm-svn: 247609
2015-09-14 20:20:34 +00:00
bfcdfb32af
Correctly align sections.
...
We have to align the start, not the end.
This should fix crashes on systems where memcpy enforces the expected
alignment.
llvm-svn: 247599
2015-09-14 19:00:35 +00:00
4340aad144
Start adding support for creating shared libraries.
...
They are not fully functional yet, but this implements enough support for lld
itself to read them.
With that, delete the .so binary we were using for tests and start eating our
own dog food.
llvm-svn: 247487
2015-09-11 22:42:45 +00:00
1d12ab3db1
Fix handling of _start being undefined.
...
We were crashing before.
llvm-svn: 247481
2015-09-11 21:44:55 +00:00
2e9eac13c7
Implement -rpath.
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llvm-svn: 247475
2015-09-11 21:18:56 +00:00
7174dcfb0f
Don't make assumptions about the size of the dynamic string table.
...
It contains pathnames, so it can be different in each machine.
llvm-svn: 247453
2015-09-11 19:12:37 +00:00
7010776db7
Implement the -dynamic-linker option.
...
With this dynamic executables can be executed with just ./t instead of
/lib64/ld-2.20.so ./t
llvm-svn: 247446
2015-09-11 18:49:42 +00:00
5723fcd015
Make this test a bit more resistant to section number changes.
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llvm-svn: 247439
2015-09-11 17:53:01 +00:00
243d90f549
Add a DT_SYMTAB entry in the dynamic section.
...
With this a trivial shared binary runs with the glibc dynamic linker:
LD_LIBRARY_PATH=. /lib64/ld-2.20.so ./t
llvm-svn: 247370
2015-09-11 01:14:39 +00:00
fb815282d5
Create a dynamic symbol table.
...
For now it includes every symbol in the regular table. Since we don't
create dynamic relocations yet, we don't have a good way of knowing which
symbols are actually needed.
llvm-svn: 247365
2015-09-11 00:30:13 +00:00
0a2e211ace
Create a PT_LOAD program header for the start of the file.
...
With this a trivial dynamic program works with the musl dynamic linker:
LD_LIBRARY_PATH=. ~/musl/lib/libc.so ./t
llvm-svn: 247290
2015-09-10 15:41:34 +00:00
60252d8feb
Change the load addr into something that works on linux x86_64.
...
With this simple static programs run again.
llvm-svn: 247205
2015-09-09 22:53:55 +00:00
1d299a8a9d
[elf2] Assign output sections to PHDRs.
...
This is a minimal implementation to produce legal output. Future patches will combine multiple compatible PT_LOADs.
llvm-svn: 247185
2015-09-09 20:48:09 +00:00
778562fc78
Add the DT_NEEDED entries to the dynamic table.
...
llvm-svn: 247181
2015-09-09 20:26:23 +00:00
3f4228f613
Start adding content to the dynamic section.
...
With this patch we create a dynamic string table (it is allocated, unlike
the regular one) and the dynamic section has a DT_STRTAB pointing to it.
llvm-svn: 247155
2015-09-09 15:33:08 +00:00
e438e07856
Create a dynamic segment.
...
It is still empty. I will add content next.
llvm-svn: 247097
2015-09-08 22:55:28 +00:00
546c64c733
[lld][elf2] Fix hard coded entry address.
...
llvm-svn: 247089
2015-09-08 22:34:57 +00:00
b9fe03d4a9
Revert "[lld][elf2] Fix hard coded entry address."
...
This reverts commit r247073.
It broke
lld :: elf2/basic32be.s
lld :: elf2/basic64be.s
llvm-svn: 247077
2015-09-08 21:32:44 +00:00
8be15899b4
[lld][elf2] Fix hard coded entry address.
...
llvm-svn: 247073
2015-09-08 21:11:25 +00:00
740fafe54d
Start creating the .dynamic section.
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For now it is always empty.
llvm-svn: 247056
2015-09-08 19:43:27 +00:00
b01b57486d
Bug fix: Assign output section indexes *after* sorting them.
...
llvm-svn: 247037
2015-09-08 18:08:57 +00:00
18173d420e
Start adding support for symbols in shared libraries.
...
llvm-svn: 247019
2015-09-08 15:50:05 +00:00
a4dd7c1d38
Revert "[elf2] Add 32S and 64 relocations (needed for musl)."
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This reverts commit r246902. It had uncessary use of yaml.
llvm-svn: 247014
2015-09-08 13:52:31 +00:00
1b3fffa6e0
[elf2] Add 32S and 64 relocations (needed for musl).
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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.
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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
d39c8cd087
Rename asm tests to .s. NFC.
...
llvm-svn: 244037
2015-08-05 12:14:51 +00:00
3c9cb4b3d3
lld elf2: Diagnose trying to mix incompatible files.
...
This is also a step in instantiating the writer with the correct template
argument.
llvm-svn: 244035
2015-08-05 12:03:34 +00:00
87ee8dcb64
Use ELFOSABI_NONE. This matches both bfd ld and gold.
...
llvm-svn: 244033
2015-08-05 11:55:52 +00:00
aefd5c1617
Create ObjectFile with the correct endian and word size.
...
The writer is still hard coded to 64 bits le, but with this we can test for
invalid ELF files.
llvm-svn: 243993
2015-08-04 15:45:54 +00:00
44fc1c0a73
[ELF2] Templatize addChunk and handle section flags.
...
llvm-svn: 243579
2015-07-29 22:14:50 +00:00
5a6f5f178e
[ELF2] Emit correct section types.
...
llvm-svn: 243509
2015-07-29 00:52:17 +00:00
8039dae26d
[ELF2] Emit section table.
...
llvm-svn: 243506
2015-07-29 00:30:10 +00:00
c34eed3045
[ELF2] Remove broken test.
...
The exact error the system returns for this case is varies between OS's and file systems.
llvm-svn: 243184
2015-07-25 00:09:22 +00:00
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
Rafael Espindola