This actually doesn't change behavior with the current LinkerInvocation, but
it's needed when you make reading parallel.

llvm-svn: 177554

llvm-svn: 177484

llvm-svn: 177483

llvm-svn: 177482

llvm-svn: 177424

llvm-svn: 177392

llvm-svn: 177079

llvm-svn: 176970

llvm-svn: 176925

llvm-svn: 176916

This reduces the time spent in this function while linking ASTMatchersTests
from %43 to %2.4 of total link time.

llvm-svn: 176842

[ELF] Set values for bss_start and end symbols properly, If there are two load segments with RW permissions, bss_start and end may get set inappropriate

llvm-svn: 176795

llvm-svn: 176749

llvm-svn: 176748

This only happens when the section header count is > 1024.

llvm-svn: 176747

llvm-svn: 176724

llvm-svn: 176583

llvm-svn: 176494

[ELF] Set symbol type to STT_SECTION, so that objdump.bfd doesnot get confused when disassembling output

llvm-svn: 176489

llvm-svn: 176483

llvm-svn: 176482

llvm-svn: 176430

llvm-svn: 176425

llvm-svn: 176424

llvm-svn: 176416

llvm-svn: 176415

llvm-svn: 176370

llvm-svn: 176324

This seems to be what ld does, but I'm not sure how it works with symbol interposition.

With this hello-world with glibc dynamically linked works.

llvm-svn: 176310

llvm-svn: 176309

llvm-svn: 176298

llvm-svn: 176294

llvm-svn: 176279

llvm-svn: 176278

llvm-svn: 176277

llvm-svn: 176207

llvm-svn: 176169

llvm-svn: 176167

llvm-svn: 176162

This adds separate PLT and dynamic relocation tables. It also fills in the dynamic table
entries for them.

llvm-svn: 176150