Commit Graph

10 Commits

Author SHA1 Message Date
Ulrich Weigand f445399870 [ppc64] Avoid copy relocs in named rodata sections
Commit r181723 introduced code to avoid placing initialized variables
needing relocations into the .rodata section, which avoid copy relocs
that do not work as expected on ppc64 function references.

The same treatment is also needed for *named* .rodata.XXX sections.
This patch changes PPC64LinuxTargetObjectFile::SelectSectionForGlobal
to modify "Kind" *before* calling the default SelectSectionForGlobal
routine, instead of first calling the default routine and then just
checking for the (main) .rodata section afterwards.

llvm-svn: 203921
2014-03-14 12:45:22 +00:00
Rafael Espindola fa0f72837f Pass the Mangler by reference.
It is never null and it is not used in casts, so there is no reason to use a
pointer. This matches how we pass TM.

llvm-svn: 201025
2014-02-08 14:53:28 +00:00
Eric Christopher 2037caf8b9 Revert r199871 and replace it with a simple check in the debug info
code to see if we're emitting a function into a non-default
text section. This is still a less-than-ideal solution, but more
contained than r199871 to determine whether or not we're emitting
code into an array of comdat sections.

llvm-svn: 200269
2014-01-28 00:49:26 +00:00
Eric Christopher 15abef6df9 Add a variable to track whether or not we've used a unique section,
e.g. linkonce, to TargetMachine and set it when we've done so
for ELF targets currently. This involved making TargetMachine
non-const in a TLOF use and propagating that change around - I'm
open to other ideas.

This will be used in a future commit to handle emitting debug
information with ranges.

llvm-svn: 199871
2014-01-23 06:47:25 +00:00
Rafael Espindola 894843cb4e Move the llvm mangler to lib/IR.
This makes it available to tools that don't link with target (like llvm-ar).

llvm-svn: 198708
2014-01-07 21:19:40 +00:00
Ulrich Weigand 0f0398246c [PowerPC] Support TLS variables in debug info
This adds an implementation of getDebugThreadLocalSymbol for
(64-bit) PowerPC.  This needs to return a generic MCExpr
since on ppc64, we need to add a bias of 0x8000 to the
value returned by the R_PPC64_DTPREL64 relocation.

llvm-svn: 185461
2013-07-02 18:47:35 +00:00
Bill Schmidt 6cda22a3b4 Fix goofy commentary in PPCTargetObjectFile.cpp.
llvm-svn: 181725
2013-05-13 19:40:36 +00:00
Bill Schmidt 22d40dcfe9 PPC64: Constant initializers with dynamic relocations go in .data.rel.ro.
This fixes warning messages observed in the oggenc application test in
projects/test-suite.  Special handling is needed for the 64-bit
PowerPC SVR4 ABI when a constant is initialized with a pointer to a
function in a shared library.  Because a function address is
implemented as the address of a function descriptor, the use of copy
relocations can lead to problems with initialization.  GNU ld
therefore replaces copy relocations with dynamic relocations to be
resolved by the dynamic linker.  This means the constant cannot reside
in the read-only data section, but instead belongs in .data.rel.ro,
which is designed for constants containing dynamic relocations.

The implementation creates a class PPC64LinuxTargetObjectFile
inheriting from TargetLoweringObjectFileELF, which behaves like its
parent except to place constants of this sort into .data.rel.ro.

The test case is reduced from the oggenc application.

llvm-svn: 181723
2013-05-13 19:34:37 +00:00
Bill Wendling bbcaa40227 Now that the default for Darwin platforms is to place the LSDA into the TEXT
section, remove the target-specific code that performs this.

llvm-svn: 98580
2010-03-15 21:09:38 +00:00
Bill Wendling dd3fe94336 The same situation that effected ARM effects PPC with regards to placing the
LSDA into the TEXT section. We need to generate non-lazy pointers to it on
Mach-O. However, the object the NLP points to may be local to the translation
unit. If so, then the NLP needs to have the value of that object specified
instead of "0", which the linker interprets as "external".

llvm-svn: 98325
2010-03-12 02:00:43 +00:00