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2011-05-22Don't allow unaligned offsets and sizes in the Win64 EH directives.Charles Davis
Also, fix threshold for 'Big' register saves. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131830 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-21Don't allow .seh_handler and .seh_handlerdata directives inside chainedCharles Davis
unwind areas. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131795 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-21A handler for a function in the Win64 EH scheme can be both an unwind handlerCharles Davis
and an exception handler. Handle that case. Also, add an 'Emitted' member to the MCWin64EHUnwindInfo struct. It will be needed later. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131791 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-21Set the "LastFrameInst" field when streaming a .seh_setframe directive. ThisCharles Davis
is needed for an upcoming patch. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131772 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-20No reason not to allow defining the CFA as a reg w/ offset zero.Jim Grosbach
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131760 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-20Add missing leading \t when printing .cfi_def_cfa in the asmstreamer.Jim Grosbach
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131755 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-20fixes target address tBL and tBLX and sets relocation typeRafael Espindola
of tBL/tBLX to R_ARM_THM_CALL (ARM ELF 4.7.1.6) Patch by koan-sin tan. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131748 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-20Now that they're implemented, make the Win64 EH MCAsmStreamer methods callCharles Davis
super. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131743 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-20"Implement" the HandlerData Win64 EH method in the base MCStreamer.Charles Davis
There's really nothing to implement. All this really does is swap to a pseudo-section that later gets written to the unwind info struct. That needs to be implemented in the object streamers. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131734 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-19Looks like OS X assemblers (including MC) don't likeRafael Espindola
foo: bar = foo .quad bar Avoid producing it. Fixes PR9951. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131687 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-19Misc code refactorings:Rafael Espindola
* Remove unnecessary arguments now that ForceExpAbs is a method. * Use ForceExpAbs in EmitAbsValue. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131683 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-19Implement the EndProlog Win64 EH method on the base MCStreamer.Charles Davis
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131679 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-19Implement the Win64 EH prolog instruction methods on the base MCStreamer.Charles Davis
I had to change the API slightly to avoid overloading issues. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131666 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-19Reapply 131644 including the missing header changes:Joerg Sonnenberger
Introduce -fatal-assembler-warnings for the obvious purpose git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131655 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-19Revert r131644; it's breaking the build.Eli Friedman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131653 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-19Turns out GAS does have Win64 EH directives. (It also supports WinCE EH.) MakeCharles Davis
ours compatible with GAS. In retrospect, I should have emailed binutils about this earlier. Thanks to Kai Tietz for pointing out that GAS already had SEH directives. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131652 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-19Introduce -fatal-assembler-warnings for the obvious purposeJoerg Sonnenberger
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131644 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-19Implement the StartChained and EndChained Win64 EH methods on MCStreamer.Charles Davis
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131629 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-19Implement the StartProc and EndProc Win64 EH methods on the base MCStreamer.Charles Davis
Based largely on Rafael Espindola's work on CFI. Other methods soon to follow. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131623 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-18Remove comments as Chris requested.Charles Davis
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131590 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-18Fix an obvious typo in r131572.Cameron Zwarich
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131579 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-18Add some more Win64 EH directives:Charles Davis
- StartChained and EndChained delimit a chained unwind area, which can contain additional operations to be undone if an exception occurs inside of it. - UnwindOnly declares that this function doesn't handle any exceptions. If it has a handler, it's an unwind handler instead of an exception handler. - Lsda declares the location and size of the LSDA, which in the Win64 EH scheme is kept inside the UNWIND_INFO struct. Windows itself ignores the LSDA; it's used by the Language-Specific Handler (the "Personality Function" from DWARF). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131572 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-18Implement the Win64 EH directive methods for the assembly language streamer.Charles Davis
GAS has no such directives (not even mingw-w64 GAS has them), so I took creative license with their names in assembly. I prefixed them all with "w64_" to avoid namespace collisions, for example. If I discover that GAS has taken a different approach, I'll change ours to match. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131525 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-18While thinking about how to know where the functions' boundaries are forCharles Davis
the purposes of the Win64 EH tables, I realized we had no way to tell where the function ends. (MASM bounds functions with PROC and ENDP keywords.) Add a directive to delimit the end of the function, and rename the 'frame' directive to more accurately reflect its duality with the new directive. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131522 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-16Add a method I forgot in the last commit. Don't worry, this one passedCharles Davis
self-host :). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131421 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-16Add a FIXME reminder to remove ForceARMElfPIC switch.Jason W Kim
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131411 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-16sets bit 0 of the function address of thumb function in .symtabRafael Espindola
("T is 1 if the target symbol S has type STT_FUNC and the symbol addresses a Thumb instruction ;it is 0 otherwise." from "ELF for the ARM Architecture" 4.7.1.2) Patch by Koan-Sin Tan! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131406 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-15Fix copy-pasto.Charles Davis
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131384 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-15Add stub methods to MCStreamer for emitting Win64 exception-handlingCharles Davis
information. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131382 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-11Remove an unused variable and move a couple others inside DEBUG.Matt Beaumont-Gay
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131208 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-11Address the last bit of relocation flag related divergence betweeenJason W Kim
LLVM and binutils. With this patch, there are no functional differences between the .o produced directly from LLVM versus the .s to .o via GNU as, for relocation tags at least, for both PIC and non-PIC modes. Because some non-PIC reloc tags are used (legally) on PIC, so IsPCRel flag is necessary but not sufficient to determine whether the overall codegen mode is PIC or not. Why is this necessary? There is an incompatibility of how relocs are emitted in the .rodata section. Binutils PIC likes to emit certain relocs as section relative offsets. Non-PIC does not do this. So I added a hidden switch on the ELFObjectwriter "-arm-elf-force-pic" which forces the objectwriter to pretend that all relocs are for PIC mode. Todo: Activate ForceARMElfPIC to true if -relocation-model=pic is selected on llc. Todo: There are probably more issues for PIC mode on ARM/MC/ELF... Todo: Existing tests in MC/ARM/elf-reloc*.ll need to be converted over to .s tests as well as expanded to cover the gamut. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131205 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-10Avoid a gcc warning.Rafael Espindola
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131161 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-10On MachO, unlike ELF, there should be no relocation to produce the CIE pointer.Rafael Espindola
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131149 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-10Rename DwarfRequiresRelocationForStmtList toRafael Espindola
DwarfRequiresRelocationForSectionOffset as this is not specific to StmtList. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131148 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-10The EH symbols are only needed in eh_frame, not debug_frame.Rafael Espindola
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131146 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-10In a debug_frame the cfi offset is to the start of the debug_frame section!Rafael Espindola
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131129 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-10Add CFIStartSections to the asm printer. Add an assert that at leastRafael Espindola
one of the sections is created. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131124 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-10Add support for producing .deubg_frame sections.Rafael Espindola
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131121 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-10Small cleanups.Rafael Espindola
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131120 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-10Factor some code into a new EmitFrames method.Rafael Espindola
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131119 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-10Remove unused argument.Rafael Espindola
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131118 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-10Parsing and plumbing for .cfi_sections.Rafael Espindola
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131117 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-08Eliminate an unused line to fix a warning.NAKAMURA Takumi
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131078 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-08Don't force relaxation of AdvanceLoc instructions on OS X. gdb is happy withRafael Espindola
the smaller encoding and this cuts 270336 bytes from a release version of clang and 1246272 bytes from a debug build. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131067 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-06Switch Darwin to the generic CIE/FDE printer.Rafael Espindola
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131031 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-06Dead code elimination.Rafael Espindola
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130984 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-05Don't produce a __debug_frame.Rafael Espindola
I tested both gdb on a bootstrapped clang and and the gdb testsuite on OS X (snow leopard) and both are happy using __eh_frame. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130937 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-04Producing a DW_FORM_addr for DW_AT_stmt_list is probably correct, butRafael Espindola
it is both inefficient and unexpected by dwarfdump. Change to a DW_FORM_data4. While in here, change the predicate name to reflect that the position is not really absolute (it is an offset), just that the linker needs a relocation. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130846 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-03MCDwarf: Don't save Twine to local variable, this is almost never safe to doDaniel Dunbar
(and should thus never be done). - Should fix a crash on win32. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130793 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-01Add r130623 back now that ELF has been fixed to work with -fno-dwarf2-cfi-asm.Rafael Espindola
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130658 91177308-0d34-0410-b5e6-96231b3b80d8
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