This member is used only by LinkerDriver, so move it to LinkerDriver.

llvm-svn: 284696

Previously, we were checking the existence of an entry symbol
too early. It was done before the linker script processor creates
symbols defined in scripts. Fixes bug 30743.

llvm-svn: 284676

The R_ARM_TARGET2 relocation is used in ARM exception tables to encode
a data dependency that will only be dereferenced by code in the
run-time support library. In a similar way to R_ARM_TARGET1 the
handling of the relocation is target specific, it maps to one of
R_ARM_ABS32, R_ARM_REL32 or R_ARM_GOT_PREL. The choice depends on the 
run-time library. R_ARM_GOT_PREL is used for linux and BSD,
R_ARM_ABS32 and R_ARM_REL32 are used for bare-metal.

The command line option --target2=<target> can be used to select the
relocation used for R_ARM_TARGET2. The default is R_ARM_GOT_PREL.

Differential revision: https://reviews.llvm.org/D25684

llvm-svn: 284404

-z wxneeded creates a PHDR PT_OPENBSD_WXNEEDED.

PT_OPENBSD_WXNEEDED
The array element specifies that a process executing this file may need to be able to map or protect memory regions as simultaneously executable and writable. If the system is unable or unwilling to permit that for this executable then it may fail immediately. This segment type is meaningful only for executable files and is ignored in other objects.

http://man.openbsd.org/OpenBSD-current/man5/elf.5

Differential revision: https://reviews.llvm.org/D25472

llvm-svn: 284226

llvm-svn: 283910

Differential Revision:   https://reviews.llvm.org/D25452

llvm-svn: 283817

This options issupported by both BFD ld and gold and allows
overriding the max page size whose default values are defined by
the target.

https://llvm.org/bugs/show_bug.cgi?id=30541

Differential Revision: https://reviews.llvm.org/D24891

llvm-svn: 282596

Because it corresponds to SORT_NONE. None was renamed Default.

llvm-svn: 281776

This fixes Bug 30385 - SORT_NONE not implemented,

`SORT_NONE' disables section sorting by ignoring the command line
section sorting option.

That is why this patch also implements --sort-section option.

Description of sorting rules
available at https://sourceware.org/binutils/docs/ld/Input-Section-Wildcards.html 

Differential revision: https://reviews.llvm.org/D24604

llvm-svn: 281771

--section-start=sectionname=org
Locate a section in the output file at the absolute address given by org. 
You may use this option as many times as necessary to locate multiple sections in the command line.
 org must be a single hexadecimal integer; for compatibility with other linkers, 
you may omit the leading `0x' usually associated with hexadecimal values. 
Note: there should be no white space between sectionname, the equals sign (“<=>”), and org.

-Tbss=org
-Tdata=org
-Ttext=org
Same as --section-start, with .bss, .data or .text as the sectionname.

Differential revision: https://reviews.llvm.org/D24294

llvm-svn: 281458

It is substantially faster by processing 8 bytes at a time.

llvm-svn: 281454

Implemented by building an ELF file in memory.

elf, default, and binary match gold behavior.

Differential Revision: https://reviews.llvm.org/D24060

llvm-svn: 281108

Fixed code that was not checked before on windows for me, because of testcases that are
disabled on that platform atm.

Inital commit message:
"[ELF] - Versionscript: do not treat non-wildcarded names as wildcards."
Previously we incorrectly handled cases when symbol name in extern c++ tag
was enclosed in quotes. Next case was treated as wildcard:

GLIBCXX_3.4 {                                                                   
    extern "C++" {  
    "aaa*"
   }
But it should have not. Quotes around aaa here means that we should have do exact
name matching.
That is PR30268 which has name with pointer is interpreted as wildcard by lld:

extern "C++" {                                                              
    "operator delete[](void*)";

Patch fixes the issue.

Differential revision: https://reviews.llvm.org/D24229

llvm-svn: 281049

Broken BB:
http://lab.llvm.org:8011/builders/lld-x86_64-darwin13/builds/27211

llvm-svn: 281046

Fixed code that was not checked by testcases that are disabled on windows.

Inital commit message:
"[ELF] - Versionscript: do not treat non-wildcarded names as wildcards."
Previously we incorrectly handled cases when symbol name in extern c++ tag
was enclosed in quotes. Next case was treated as wildcard:

GLIBCXX_3.4 {                                                                   
    extern "C++" {  
    "aaa*"
   }
But it should have not. Quotes around aaa here means that we should have do exact
name matching.
That is PR30268 which has name with pointer is interpreted as wildcard by lld:

extern "C++" {                                                              
    "operator delete[](void*)";

Patch fixes the issue.

Differential revision: https://reviews.llvm.org/D24229

llvm-svn: 281045

http://lab.llvm.org:8011/builders/llvm-clang-lld-x86_64-scei-ps4-ubuntu-fast/builds/19703

llvm-svn: 281041

Previously we incorrectly handled cases when symbol name in extern c++ tag
was enclosed in quotes. Next case was treated as wildcard:

GLIBCXX_3.4 {                                                                   
    extern "C++" {  
    "aaa*"
   }
But it should have not. Quotes around aaa here means that we should have do exact
name matching.
That is PR30268 which has name with pointer is interpreted as wildcard by lld:

extern "C++" {                                                              
    "operator delete[](void*)";

Patch fixes the issue.

Differential revision: https://reviews.llvm.org/D24229

llvm-svn: 281038

Differential revision: https://reviews.llvm.org/D23925

llvm-svn: 280912

"Error" looks like it is indicating a parse error. "Error" actually
instructs the later process to report an error if there's an error
condition. Thus the new name.

llvm-svn: 280529

llvm-svn: 280528

FreeBSD's libstdc++ build (used on tier-2 architectures) uses GNU ld's 
-f <name> option, which sets the DT_AUXILIARY field to the specified name.
Multiple -f options may be specified and the DT_AUXILIARY entries 
will be added in the order in which they appear.

Patch implements that option.

Differential revision: https://reviews.llvm.org/D24139

llvm-svn: 280475

DiscardPolicy is enum replacing several boolean options. 
This approach is not only consistent with what we use for 
unresolveds (UnresolvedPolicy), but also should help to solve a problem 
of options with opposing meanings, mentioned in PR28843

Differential revision: https://reviews.llvm.org/D23868

llvm-svn: 280209

This approach is not only consistent with UnresolvedPolicy, 
but also should help to solve a problem 
of options with opposing meanings, mentioned in PR28843

Differential revision: https://reviews.llvm.org/D23869

llvm-svn: 280206

Differential revision: https://reviews.llvm.org/D23349

llvm-svn: 279810

-oformat output-format
`-oformat' option can be used to specify the binary format for the output object file.

Patch implements binary format output type.

Differential revision: https://reviews.llvm.org/D23769

llvm-svn: 279726

This option can be used to specify the stack size of the
PT_GNU_STACK segment.

Differential Revision: https://reviews.llvm.org/D23538

llvm-svn: 279013

Differential Revision:  https://reviews.llvm.org/D22990

llvm-svn: 277369

llvm-svn: 275724

Versions can be assigned to symbols in two different ways.
One is the usual version scripts, and the other is special
symbol suffix '@'. If a symbol contains '@', the string after
that is considered to specify a version name.

Previously, we look for '@' for all symbols.

Anything that works on every symbol can be expensive because
the linker has to handle a lot of symbols. The search for '@'
was not an exception.

In this patch, I made two optimizations.

The first optimization is to handle '@' only when at least one
version is defined. If no versions are defined, no versions can
be assigned to any symbols, so it's waste of time to search for '@'.

The second optimization is to scan only suffixes of symbol names
instead of entire symbol names. Symbol names can be very long, but
symbol versions are usually short, so scanning entire symbol names
is waste of time, too.

There are some error cases which we no longer be able to detect
with this patch. I don't think it's a major drawback because they
are minor errors. Speed is more important.

This change improves LLD with debug info self-link time from
6.6993 seconds to 6.3426 seconds (or -5.3%).

Differential Revision: https://reviews.llvm.org/D22433

llvm-svn: 275711

BSD toolchain contains a bug:
https://sourceforge.net/p/elftoolchain/tickets/491/

In short demangler works differently, fix was to update the testcase.
It should fix the FreeBSD bot failture:
http://lab.llvm.org:8011/builders/lld-x86_64-freebsd/builds/19432/steps/test_lld/logs/stdio

Original commit message was:
[ELF] - Implement extern "c++" version script tag

Patch implements 'extern' version script tag.
Currently only values in quotes(") are supported.

Matching of externs is performed in the same pass as exact match of globals.

Differential revision: http://reviews.llvm.org/D21930

llvm-svn: 275682

SymbolVersions sounds like it had versions for a symbol, so rename it.

llvm-svn: 275674

The identifier `Version` was used too often in the code to handle
symbol versions. The struct that contains version definitions is
named `Version`. Local variables for version ID are named `Version`.
Local varaible for version string are named `Version`.

This patch give them different names.

llvm-svn: 275673

llvm-svn: 275669

Config members are named after corresponding command line options.
This patch renames VAStart ImageBase so that they are in line with
--image-base.

Differential Revision: http://reviews.llvm.org/D22277

llvm-svn: 275298

It broke build bots:
http://lab.llvm.org:8011/builders/llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast/builds/8204
http://lab.llvm.org:8011/builders/lld-x86_64-freebsd/builds/19432

llvm-svn: 275258

Patch implements 'extern' version script tag.
Currently only values in quotes(") are supported.

Matching of externs is performed in the same pass as exact match of globals.

Differential revision: http://reviews.llvm.org/D21930

llvm-svn: 275257

The -image-base option allows for overriding the base address.

Differential Revision: http://reviews.llvm.org/D22116

llvm-svn: 275206

That helps to avoid expressions like I + 2 in code
that assigns version number to symbols.

Change was suggested by Rui Ueyama.

Differential revision: http://reviews.llvm.org/D22086

llvm-svn: 275159

  When building executable usually version script is absent.
Before this patch error was shown in the case when
symbol name contained version and there was no script to match it.
  Instead of error out patch allows
to create new version declaration in this case and use it.
gnu linkers do the same.

That is PR28359.

Differential revision: http://reviews.llvm.org/D21890

llvm-svn: 274828

warning() depends on Config->FatalWarnings, so we don't want to call
that function before we initialize that member.

llvm-svn: 274723