Testcase itself depends on .text section location, which was orphan earlier.

Suggested by Rafael Espíndola

llvm-svn: 302792

Differential Revision: https://reviews.llvm.org/D33024

llvm-svn: 302748

llvm-svn: 302719

So that it is clear that the function is a wrapper for for_each_n.

llvm-svn: 302718

This improves many-sections.s with a linker script from 22s to 0.9s.

llvm-svn: 302708

We now always use getCmd. I will optimize it in a followup commit.

llvm-svn: 302706

llvm-svn: 302697

Previously we were not printing out the type of the incompatible section
which made it difficult to determine what the problem was.

The error message format has been change to the following:

  error: section type mismatch for .shstrtab
  >>> <internal>:(.shstrtab): SHT_STRTAB
  >>> output section .shstrtab: Unknown

Patch by Alexander Richardson.

Differential Revision: https://reviews.llvm.org/D32488

llvm-svn: 302694

llvm-svn: 302690

This behavior differs from the semantics implemented by GNU linkers
which only define this symbol iff ELF headers are in the memory
mapped segment.

Differential Revision: https://reviews.llvm.org/D33019

llvm-svn: 302687

We used to inherit from it, but don't need it anymore.

llvm-svn: 302675

llvm-svn: 302672

llvm-svn: 302671

This is PR32664.

Issue was revealed by linux kernel script which was:

SECTIONS {
 . = (0xffffffff80000000 + ALIGN(0x1000000, 0x200000));
 phys_startup_64 = ABSOLUTE(startup_64 - 0xffffffff80000000);

 .text : AT(ADDR(.text) - 0xffffffff80000000) {
.....
  *(.head.text)
Where startup_64 is in .head.text.

At the place of assignment to phys_startup_64 we can not calculate absolute value for startup_64
because .text section has no VA assigned. Two patches were prepared earlier to address this: D32173 and D32174.

And in comments for D32173 was suggested not try to support this case, but error out.

Differential revision: https://reviews.llvm.org/D32793

llvm-svn: 302668

When compiling LLD using GCC 7 it reports warnings like:
"warning: this statement may fall through [-Wimplicit-fallthrough=]"

LLVM has LLVM_FALLTHROUGH macro which can be used to avoid such warnings.
Together with D33036 this patch fixes them.

Differential revision: https://reviews.llvm.org/D32907

llvm-svn: 302666

llvm-svn: 302662

This is just faster and avoids using names.

llvm-svn: 302661

Differential Revision: https://reviews.llvm.org/D33016

llvm-svn: 302613

Adds support for the ORIGIN and LENGTH linker script built in functions.

  ORIGIN(memory) Return the origin of the memory region
  LENGTH(memory) Return the length of the memory region

Redo of D29775 for refactored linker script parsing.

Patch by Robert Clarke

Differential Revision: https://reviews.llvm.org/D32934

llvm-svn: 302564

This is a bit easier to read and a lot faster in some cases. A version
of many-sections.s with linker scripts goes from 0m41.232s to
0m19.575s.

llvm-svn: 302528

Adapt to changes made in r302499.

llvm-svn: 302501

The code following this one already considers every possible insertion
point for orphan sections, there is no point in sorting them before.

llvm-svn: 302441

This is PR32437.

DF_STATIC_TLS
If set in a shared object or executable, this flag instructs the 
dynamic linker to reject attempts to load this file dynamically. 
It indicates that the shared object or executable contains code 
using a static thread-local storage scheme. Implementations need 
not support any form of thread-local storage.

Patch checks if IE/LE relocations were used to check if code uses
static model. If so it sets the DF_STATIC_TLS flag.

Differential revision: https://reviews.llvm.org/D32354

llvm-svn: 302414

Previously it was impossible to use linkerscript with --compress-debug-sections 
because of assert failture:
Assertion failed: isFinalized(), file C:\llvm\lib\MC\StringTableBuilder.cpp, line 64

Patch fixes the issue

llvm-svn: 302413

llvm-svn: 302363

This patch do s/color/class/g.

llvm-svn: 302326

llvm-svn: 302324

llvm-svn: 302304

We can set SectionIndex tentatively as we process the linker script
instead of looking it repeatedly.

In general we should try to have as few name lookups as possible.

llvm-svn: 302299

llvm-svn: 302295

llvm-svn: 302293

llvm-svn: 302291

This is one step in preparation of raising this up to
LLVM.  This hides all of the Executor stuff in a private
implementation file, leaving only the core algorithms and
the TaskGroup class exposed.  In doing so, fix up all the
variable names to conform to LLVM style.

Differential Revision: https://reviews.llvm.org/D32890

llvm-svn: 302288

This feels a bit hackish, but I think it is still an improvement.

The way a tls address is computed in the various architectures is not
that different. For example, for local dynamic we need the base of the
tls (R_TLSLD or R_TLSLD_PC), and the offset of that particular symbol
(R_ABS).

Given the similarity, we can just use the expressions instead of
having two additional target hooks.

llvm-svn: 302279

llvm-svn: 302273

LazyObjectFile might turn out to be a BitcodeFile, so we need
OffsetInArchive.

llvm-svn: 302242

The test ELF/lto/thin-archivecollision.ll was not testing what it
wanted to test. It needs two archive members with the same name, but
different offsets.

Without this we could remove all references of OffsetInArchive and all
tests would still pass.

Fixing the test showed that the --whole-archive case was broken, which
this patch fixes.

llvm-svn: 302241

It is needed for creating an unique identifier for ThinLTO.

This fixes pr32931.

llvm-svn: 302235

Previously we accepted --defsym=foo=value only.

Reported by Sean Silva.

llvm-svn: 302227

In the non linker script case we would try very early to find out if
we could allocate the headers. Failing to do that would add extra
alignment to the first ro section, since we would set PageAlign
thinking it was the first section in the PT_LOAD.

In the linker script case the header allocation must be done in the
end, causing some duplication.

We now tentatively add the headers to the first PT_LOAD and if it
turns out they don't fit, remove them. With this we only need to
allocate the headers in one place in the code.

llvm-svn: 302186