This implementation is known to work in very simple cases (see new test case).

Differential Revision: http://reviews.llvm.org/D10115

llvm-svn: 238777

llvm-svn: 238734

This is a follow-on to r238732

llvm-svn: 238733

This fixes build error with gcc.

llvm-svn: 238732

llvm-svn: 238719

llvm-svn: 238718

llvm-svn: 238717

Instead of returning non-categorized errors, return categorized errors.
All uses of make_dynamic_error_code are removed.

Because we don't have error reporting mechanism, I just chose to print out
error messages to stderr, and then return an error object. Not sure if
that's the right thing to do, but at least it seems practical.

http://reviews.llvm.org/D10129

llvm-svn: 238714

Previously, this feature was implemented using a special type of
undefined symbol, in addition to an intricate way to make the resolver
read a virtual file containing that renaming symbols.

Now the feature is directly handled by the symbol table.
The symbol table has a function, rename(), to rename symbols, whose
definition is 4 lines long. Symbol renaming is naturally modeled using
Symbol and SymbolBody.

llvm-svn: 238696

llvm-svn: 238691

Previously, a MemoryBuffer of a file was owned by each InputFile object.
This patch makes the Driver own all of them. InputFiles now have only
MemoryBufferRefs. This change simplifies ownership managment
(particularly for ObjectFile -- the object owned a MemoryBuffer only when
it's not created from an archive file, because in that case a parent
archive file owned the entire buffer. Now it owns nothing unconditionally.)

llvm-svn: 238690

No functional changes.

llvm-svn: 238689

The .reginfo should not belong to the separate segment if there is
a .MIPS.abiflags section.

llvm-svn: 238688

llvm-svn: 238687

http://dmz-portal.mips.com/wiki/MIPS_O32_ABI_-_FR0_and_FR1_Interlinking

llvm-svn: 238686

llvm-svn: 238685

New MipsAbiInfoHandler merges and hold both ELF header flags
and registries usage masks. In the future commits it will manage some
additional information.

llvm-svn: 238684

llvm-svn: 238683

llvm-svn: 238682

It does not involve notions of virtual archives or virtual files,
nor store a list of undefined symbols somewhere else to consume them later.
We did that before. In this patch, undefined symbols are just added to
the symbol table, which now can be done in very few lines of code.

llvm-svn: 238681

llvm-svn: 238679

llvm-svn: 238678

Previously the main linker routine is just a non-member function.
We store some context information to the Config object.
This patch makes it belong to Driver.

llvm-svn: 238677

llvm-svn: 238675

llvm-svn: 238670

llvm-svn: 238669

llvm-svn: 238668

`main` is not the only main function in Windows. You can choose one
from these four -- {w,}{WinMain,main}. There are four different entry
point functions for them, {w,}{WinMain,main}CRTStartup, respectively.
The linker needs to choose the right one depending on which `main`
function is defined.

llvm-svn: 238667

llvm-svn: 238662

Section names were truncated to 8 bytes because the section table's
name field is 8 byte long. This patch creates the string table to
store long names.

llvm-svn: 238661

The new mechanism is less code, and fixes the case where all inputs
are archives.

Differential Revision: http://reviews.llvm.org/D10136

llvm-svn: 238618

llvm-svn: 238571

llvm-svn: 238570

llvm-svn: 238569

llvm-svn: 238568

llvm-svn: 238567

llvm-svn: 238565

llvm-svn: 238564

llvm-svn: 238563

Currently we set the field to zero, but as per the spec, we should
set numbers we read from import library files. The loader uses the
values as starting offsets for binary search when looking up imported
symbols from DLL.

llvm-svn: 238562