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73 Commits

Author SHA1 Message Date
Charles Davis
7f9c007dce A handler for a function in the Win64 EH scheme can be both an unwind handler 
and an exception handler. Handle that case.

Also, add an 'Emitted' member to the MCWin64EHUnwindInfo struct. It will be
needed later.

llvm-svn: 131791
 2011-05-21 15:57:49 +00:00
Charles Davis
520128d52f Set the "LastFrameInst" field when streaming a .seh_setframe directive. This 
is needed for an upcoming patch.

llvm-svn: 131772
 2011-05-21 00:09:04 +00:00
Charles Davis
5e5cc95580 "Implement" the HandlerData Win64 EH method in the base MCStreamer. 
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.

llvm-svn: 131734
 2011-05-20 16:06:22 +00:00
Rafael Espindola
97c81eee80 Looks like OS X assemblers (including MC) don't like 
foo:
bar = foo
.quad bar

Avoid producing it. Fixes PR9951.

llvm-svn: 131687
 2011-05-19 22:05:56 +00:00
Rafael Espindola
c03bb178a0 Misc code refactorings: 
* Remove unnecessary arguments now that ForceExpAbs is a method.
* Use ForceExpAbs in EmitAbsValue.

llvm-svn: 131683
 2011-05-19 21:40:34 +00:00
Charles Davis
300a470f45 Implement the EndProlog Win64 EH method on the base MCStreamer. 
llvm-svn: 131679
 2011-05-19 21:24:54 +00:00
Charles Davis
925eab3fd7 Implement the Win64 EH prolog instruction methods on the base MCStreamer. 
I had to change the API slightly to avoid overloading issues.

llvm-svn: 131666
 2011-05-19 19:35:55 +00:00
Charles Davis
bb99a68546 Turns out GAS does have Win64 EH directives. (It also supports WinCE EH.) Make 
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.

llvm-svn: 131652
 2011-05-19 17:46:39 +00:00
Charles Davis
e6942fd10b Implement the StartChained and EndChained Win64 EH methods on MCStreamer. 
llvm-svn: 131629
 2011-05-19 04:04:13 +00:00
Charles Davis
2940df3099 Implement the StartProc and EndProc Win64 EH methods on the base MCStreamer. 
Based largely on Rafael Espindola's work on CFI. Other methods soon to follow.

llvm-svn: 131623
 2011-05-19 02:49:00 +00:00
Charles Davis
48ea9389dc Add some more Win64 EH directives: 
- 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).

llvm-svn: 131572
 2011-05-18 20:54:10 +00:00
Charles Davis
81fa5ec5c3 While thinking about how to know where the functions' boundaries are for 
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.

llvm-svn: 131522
 2011-05-18 04:47:22 +00:00
Charles Davis
173b0d324a Add a method I forgot in the last commit. Don't worry, this one passed 
self-host :).

llvm-svn: 131421
 2011-05-16 21:13:58 +00:00
Charles Davis
576f65b4b2 Fix copy-pasto. 
llvm-svn: 131384
 2011-05-15 17:28:27 +00:00
Charles Davis
900df11077 Add stub methods to MCStreamer for emitting Win64 exception-handling 
information.

llvm-svn: 131382
 2011-05-15 17:20:01 +00:00
Rafael Espindola
33cc7a8f74 Add CFIStartSections to the asm printer. Add an assert that at least 
one of the sections is created.

llvm-svn: 131124
 2011-05-10 13:39:48 +00:00
Rafael Espindola
b7c942431f Add support for producing .deubg_frame sections. 
llvm-svn: 131121
 2011-05-10 03:54:12 +00:00
Rafael Espindola
3d5f7d1fc1 Factor some code into a new EmitFrames method. 
llvm-svn: 131119
 2011-05-10 03:14:15 +00:00
Rafael Espindola
c5f10dda05 Parsing and plumbing for .cfi_sections. 
llvm-svn: 131117
 2011-05-10 01:10:18 +00:00
Rafael Espindola
2f2c3bf31f Simplify the handling of pcrel relocations on ELF. Now we do the right thing 
for all symbol differences and can drop the old EmitPCRelSymbolValue
method.

This also make getExprForFDESymbol on ELF equal to the one on MachO, and it
can be made non-virtual.

llvm-svn: 130634
 2011-05-01 03:50:49 +00:00
Rafael Espindola
17e6a392af Implement MCAsmStreamer::EmitDwarfAdvanceFrameAddr. 
llvm-svn: 130585
 2011-04-30 03:21:04 +00:00
Rafael Espindola
4f9a76ab0b Mark the EH symbol global or weak if the corresponding function is. 
llvm-svn: 130397
 2011-04-28 12:50:37 +00:00
Rafael Espindola
133c684456 Factor a bit of code to MCStreamer::EmitLabel. Keep track of the last 
non private symbol. This will be use for handling

foo:
  .cfi_startproc
  ...

On OS X where we have to create a foo.eh symbol.

llvm-svn: 130305
 2011-04-27 15:21:19 +00:00
Devang Patel
7220c1a021 Reduce clutter in asm output. Do not emit source location as comment for each instruction. 
llvm-svn: 129715
 2011-04-18 20:26:49 +00:00
Rafael Espindola
63f8a9ad72 Be consistent about being virtual and returning void in the cfi methods. 
Implement the ones that were missing in the asm streamer.

llvm-svn: 129413
 2011-04-12 23:59:07 +00:00
Rafael Espindola
9f6146c464 Remove LastOffset from the asm parser. 
llvm-svn: 129378
 2011-04-12 18:53:30 +00:00
Rafael Espindola
5c5bb3e9a6 Fix the case of a .cfi_rel_offset before any .cfi_def_cfa_offset. 
llvm-svn: 129362
 2011-04-12 16:12:03 +00:00
Rafael Espindola
7c4de15c7b Implement .cfi_same_value. 
llvm-svn: 129361
 2011-04-12 15:31:05 +00:00
Anton Korobeynikov
917ca94111 Preliminary support for ARM frame save directives emission via MI flags. 
This is just very first approximation how the stuff should be done
(e.g. ARM-only for now). More to follow.

llvm-svn: 127101
 2011-03-05 18:43:32 +00:00
Anton Korobeynikov
62e48532b9 Some first rudimentary support for ARM EHABI: print exception table in "text mode". 
llvm-svn: 127099
 2011-03-05 18:43:15 +00:00
Joerg Sonnenberger
2204260330 Use a vector of pairs to implement the section stack, not two 
independent vectors.

llvm-svn: 126099
 2011-02-21 01:07:42 +00:00
Rafael Espindola
b59fdeb3de Add support for pushsection and popsection. Patch by Joerg Sonnenberger. 
llvm-svn: 125629
 2011-02-16 01:08:29 +00:00
Rafael Espindola
ed7b5659d4 Remove second return. 
llvm-svn: 122616
 2010-12-29 02:42:33 +00:00
Rafael Espindola
d51ed1fc6a Implement cfi_def_cfa. Also don't convert to dwarf reg numbers twice. Looks 
like 6 is a fixed point of that and so the previous tests were OK :-)

llvm-svn: 122614
 2010-12-29 01:42:56 +00:00
Rafael Espindola
257de5c4a2 Implement cfi_def_cfa_register. 
llvm-svn: 122612
 2010-12-29 00:26:06 +00:00
Rafael Espindola
061209eaf3 Initial .cfi_offset implementation. 
llvm-svn: 122611
 2010-12-29 00:09:59 +00:00
Rafael Espindola
3fdd045643 Implement .cfi_remember_state and .cfi_restore_state. 
llvm-svn: 122602
 2010-12-28 18:36:23 +00:00
Rafael Espindola
0552cb0638 Start adding basic support for emitting the call frame instructions. 
llvm-svn: 122590
 2010-12-28 04:15:37 +00:00
Rafael Espindola
12c30aed07 Add support for .cfi_lsda. 
llvm-svn: 122584
 2010-12-27 15:56:22 +00:00
Rafael Espindola
e7e67fce10 Add support for the same encodings of the personality function that gnu as 
supports.

llvm-svn: 122577
 2010-12-27 00:36:05 +00:00
Rafael Espindola
81ac7c5fad Rename NeedsSetToChangeDiffSize to HasAggressiveSymbolFolding which is a much 
better name and matches what is used in the MachO writer.

llvm-svn: 122443
 2010-12-22 21:51:29 +00:00
Matt Beaumont-Gay
64b9dd6a4b Better fix for opt build 
llvm-svn: 121910
 2010-12-15 23:14:45 +00:00
Matt Beaumont-Gay
d59894002d Fix opt -Werror build 
llvm-svn: 121904
 2010-12-15 22:21:20 +00:00
Rafael Espindola
102a0b7b74 Generalize an assert. 
llvm-svn: 121851
 2010-12-15 07:12:24 +00:00
Rafael Espindola
0e665e502d Fixed version of 121434 with no new memory leaks. 
llvm-svn: 121471
 2010-12-10 07:39:47 +00:00
Rafael Espindola
011e168728 Revert my previous patch to make the valgrind bots happy. 
llvm-svn: 121461
 2010-12-10 04:01:09 +00:00
Rafael Espindola
03ad1e8f1f Initial support for the cfi directives. This is just enough to get 
f:
        .cfi_startproc
        nop
        .cfi_endproc

assembled (on ELF).

llvm-svn: 121434
 2010-12-09 23:48:29 +00:00
Devang Patel
bef09ddec8 Add assert to catch an attempt to emit .byte 256 
llvm-svn: 121402
 2010-12-09 19:26:21 +00:00
Rafael Espindola
3e954d16f4 Second try at making direct object emission produce the same results 
as llc + llvm-mc. This time ELF is not changed and I tested that llvm-gcc
bootstrap on darwin10 using darwin9's assembler and linker.

llvm-svn: 121006
 2010-12-06 17:27:56 +00:00
Rafael Espindola
4ec917db9b Revert previous two patches while I try to find out how to make both 
linux and darwin assemblers happy :-(

llvm-svn: 121004
 2010-12-06 15:35:15 +00:00