This patch allows static linking of TLS code. To do that it fixes
GOT entries initialization.

If TLS-related GOT entry created for a preemptible symbol i.e. has
a corresponding dynamic relocation, leave the entry initialized by zero.
Write down adjusted TLS symbol's values otherwise. For the adjustments
calculation use offsets for thread-local storage.

https://www.linux-mips.org/wiki/NPTL

llvm-svn: 280914

llvm-svn: 280913

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

llvm-svn: 280912

llvm-svn: 280911

Previous way of accessing templated methods was a bit bulky,
Patch introduces small interface based solution.

Differential revision: https://reviews.llvm.org/D23872

llvm-svn: 280910

GCC passes it by default on powerpc64 on FreeBSD. GNU ld claims "this
option is ignored for SVR4 compatibility", so we can ignore it too.

Differential Revision:	https://reviews.llvm.org/D24313

llvm-svn: 280864

llvm-svn: 280858

llvm-svn: 280856

llvm-svn: 280803

Previously we combined sections by name if linkerscript was used.
For that we had to disable SHF_MERGE handling temporarily, but then
found that implementing it properly will require additional complexity layers like
subsections or something.
At the same time looks we can live with multiple output sections approach for now.
That patch do this change.

Differential revision: https://reviews.llvm.org/D24127

llvm-svn: 280801

GNU ld supports [chars] wildcards in version scripts, to match a single instance of any of the chars.
Here is an extern example from libstdc++'s version script in FreeBSD:

extern "C++"
{
...

std::locale::_[T-Za-z]*;                                                                                                       
std::[A-Zm]*;                                                            
std::n[^u]*;                                                             
std::nu[^m]*;                                                            
std::num[^e]*;
...

}

Patch adds support for scripts above. This is PR29093.

Differential revision: https://reviews.llvm.org/D23803

llvm-svn: 280799

This patch allows making section defined symbols absolute:
.foo : {
  begin_foo = ABSOLUTE(.);
  *(.foo)
}

Differential revision: https://reviews.llvm.org/D24135

llvm-svn: 280788

llvm-svn: 280766

llvm-svn: 280753

llvm-svn: 280733

This flag is supported by both BFD ld and gold and is occasionally
used to negate the effect of -gc-sections flag.

Differential Revision: https://reviews.llvm.org/D24270

llvm-svn: 280729

llvm-svn: 280724

Fixes pr30282.

llvm-svn: 280709

Patch implements FILL just as alias for =fillexpr. 
This allows to make implementation much shorted and simpler than D24186.

Differential revision: https://reviews.llvm.org/D24227

llvm-svn: 280708

llvm-svn: 280666

llvm-svn: 280665

On most architectures the linker is required to optimize away any
references to __tls_get_addr in case of static linking. As usual
a special case is MIPS - libc defines __tls_get_addr itself because
there are no TLS optimizations for this architecture.

llvm-svn: 280664

It looks like MIPS dynamic loader does not support RELCOUNT tag.
Both gold/bfd linkers does not emit this tag on MIPS. I will investigate
the problem further but for now it is better to behave like GNU linkers.

llvm-svn: 280630

llvm-svn: 280548

The patch adds support for both '-' and '~' unary expressions. Also it
brings support for signed numbers is expressions.

https://llvm.org/bugs/show_bug.cgi?id=30221

Differential revision: https://reviews.llvm.org/D24128

llvm-svn: 280546

Use std::regex instead of hand written matcher.

Patch based on code and ideas of Rui Ueyama.

Differential revision: https://reviews.llvm.org/D23829

llvm-svn: 280544

llvm-svn: 280533

"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

Cmd used to be the single central place to dispatch. It is not longer
the case because we have a logic for readProvideOrAssignment().
This patch removes the hash table so that evrything is in a single
function. This is slightly verbose but should improve readability.

Differential Revision: https://reviews.llvm.org/D24200

llvm-svn: 280524

llvm-svn: 280515

Both bfd and gold accept:
foo = 1K;
bar = 1M;
zed = 1H;

And lowercase forms: k, m, h.
Patch adds support for that.

Differential revision: https://reviews.llvm.org/D24194

llvm-svn: 280494

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

llvm-svn: 280423

The primary use of build-id is in debugging, hence omitting debug
sections when computing it significantly reduces its usability as
changes in debug section content wouldn't alter the build-id.

Differential Revision: https://reviews.llvm.org/D24120

llvm-svn: 280421

This is what InputSectionBase<ELFT>::relocate does and we need to be
consistent. The other option would be to be more explicit about which
relocations are signed and which are not, and sign extend only when
appropriated. That would require extending the target interface.

llvm-svn: 280366

Previously we used LayoutInputSection class to correctly assign
symbols defined in linker script. This patch removes it and uses
pointer to preceding input section in SymbolAssignment class instead.

Differential revision: https://reviews.llvm.org/D23661

llvm-svn: 280348

They were both pointing to the start of the got, not the end.

Fixes pr28924.

llvm-svn: 280310

llvm-svn: 280305

Target->RelativeRel is used for all platforms, but AMDGPU did
not send that member.

Fixes bug 30227 - RelativeRel is used, but not initialized for AMDGPU.

Differential Revision: https://reviews.llvm.org/D24100

llvm-svn: 280291