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240 Commits

Author SHA1 Message Date
Bill Wendling
c998f71d14 Encode that we have a personality function. 
llvm-svn: 135227
 2011-07-15 00:07:31 +00:00
Bill Wendling
dafd598f05 * If we have an LSDA, we need to mark it in the encoding. 
* The personality function should be encoded as an absolute pointer to the function.

llvm-svn: 135215
 2011-07-14 23:34:45 +00:00
Evan Cheng
c7ac690ba2 Unfortunately several files in MC are badly violating layering rule by using 
TargetAsmInfo, which in turn pulls in TargetRegisterInfo, etc. :-( There are
other cases of violations, but this is probably the worst.

This patch is but one small step towards fixing this. 500 more steps to go. :-(

llvm-svn: 135131
 2011-07-14 05:43:07 +00:00
Bill Wendling
ee6e776be2 Don't emit the FDE end label if the last thing emitted was a compact unwind and 
not the FDE

llvm-svn: 135020
 2011-07-13 00:49:09 +00:00
Bill Wendling
b6adf46f62 Add a target hook to encode the compact unwind information. 
llvm-svn: 134577
 2011-07-07 00:54:13 +00:00
Bill Wendling
7ed5625082 Clean up the #includes. 
llvm-svn: 134557
 2011-07-06 22:52:32 +00:00
Bill Wendling
c737ac1816 Remove tabs. 
llvm-svn: 134212
 2011-06-30 23:59:38 +00:00
Bill Wendling
40cc749788 Improve comment: Show the register the DWARF label is added to. 
llvm-svn: 134209
 2011-06-30 23:47:40 +00:00
Bill Wendling
2fd8d775df Add one more comment to the FDE verbose asm output. 
llvm-svn: 134200
 2011-06-30 22:35:49 +00:00
Bill Wendling
f166ab447e Add comments to the FDE. 
llvm-svn: 134196
 2011-06-30 22:02:20 +00:00
Bill Wendling
e7fe47e53b Add more comments to the ASM output for the CIE's "moves". 
llvm-svn: 134194
 2011-06-30 21:45:12 +00:00
Bill Wendling
567a1aee85 Add comments to the ASM output to help understand the compact unwind and CIE tables. 
llvm-svn: 134191
 2011-06-30 21:25:51 +00:00
Bill Wendling
7517466970 * Use the proper size to output the range size. 
* Rough in the compact encoding part.

llvm-svn: 134119
 2011-06-30 00:30:52 +00:00
Bill Wendling
4cdb206e76 Stupid error: If the LSDA and Personality functions aren't there, emit 0 instead 
of the encoding.

llvm-svn: 134117
 2011-06-29 23:53:16 +00:00
Bill Wendling
8fa4ada5cf We don't want to use relocations inside the compact unwind section. Just use the 
symbols instead.

llvm-svn: 134115
 2011-06-29 23:49:12 +00:00
Bill Wendling
25fbb92320 Use a reference. Don't make a useless copy of the vector. 
llvm-svn: 133707
 2011-06-23 07:55:41 +00:00
Bill Wendling
a4b9d1f97b Formatting changes. No functionality change. 
llvm-svn: 133706
 2011-06-23 07:44:54 +00:00
Bill Wendling
9af2fa9d1b Use the presence of the __compact_unwind section to indicate that a target 
supports compact unwind info instead of having a separate flag indicating this.

llvm-svn: 133685
 2011-06-23 05:13:28 +00:00
Bill Wendling
e8fc92ad46 Some skeleton code to emit the compact unwind. If the information is unable to 
be emitted in a compact way, we then default to emitting a CIE and FDE.

llvm-svn: 133676
 2011-06-23 01:06:23 +00:00
Benjamin Kramer
f7cb7ef996 Directly print to a raw_ostream instead of printing to a buffer first. 
llvm-svn: 133352
 2011-06-18 14:42:47 +00:00
Jim Grosbach
8aded86edb No reason not to allow defining the CFA as a reg w/ offset zero. 
llvm-svn: 131760
 2011-05-20 21:50:09 +00:00
Rafael Espindola
de32fa163f Avoid a gcc warning. 
llvm-svn: 131161
 2011-05-10 22:28:35 +00:00
Rafael Espindola
99f6735532 On MachO, unlike ELF, there should be no relocation to produce the CIE pointer. 
llvm-svn: 131149
 2011-05-10 20:59:42 +00:00
Rafael Espindola
d0d2354258 The EH symbols are only needed in eh_frame, not debug_frame. 
llvm-svn: 131146
 2011-05-10 19:51:53 +00:00
Rafael Espindola
27390b4a0e In a debug_frame the cfi offset is to the start of the debug_frame section! 
llvm-svn: 131129
 2011-05-10 15:20:23 +00:00
Rafael Espindola
1ecb12fc57 Add support for producing .deubg_frame sections. 
llvm-svn: 131121
 2011-05-10 03:54:12 +00:00
Rafael Espindola
b6444c0401 Small cleanups. 
llvm-svn: 131120
 2011-05-10 03:26:21 +00:00
Rafael Espindola
0e130d1d37 Remove unused argument. 
llvm-svn: 131118
 2011-05-10 03:01:39 +00:00
NAKAMURA Takumi
392445823d Eliminate an unused line to fix a warning. 
llvm-svn: 131078
 2011-05-08 23:19:04 +00:00
Rafael Espindola
ab39c63538 Don't force relaxation of AdvanceLoc instructions on OS X. gdb is happy with 
the smaller encoding and this cuts 270336 bytes from a release version of
clang and 1246272 bytes from a debug build.

llvm-svn: 131067
 2011-05-08 14:35:21 +00:00
Rafael Espindola
bcabcdcedd Switch Darwin to the generic CIE/FDE printer. 
llvm-svn: 131031
 2011-05-06 22:29:04 +00:00
Daniel Dunbar
f6daf94ab2 MCDwarf: Don't save Twine to local variable, this is almost never safe to do 
(and should thus never be done).
 - Should fix a crash on win32.

llvm-svn: 130793
 2011-05-03 21:33:37 +00:00
Rafael Espindola
750cb61553 GCC uses a different encoding of pointers in the FDE when using 
-fno-dwarf2-cfi-asm. Implement the same behavior.

llvm-svn: 130637
 2011-05-01 04:49:54 +00:00
Rafael Espindola
fd05785324 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
6a85f9b42e Avoid some uses of .uleb128. This is a small speedup and more importantly 
lets this code be used when producing assembly code for old assemblers without
uleb support.

llvm-svn: 130544
 2011-04-29 21:50:57 +00:00
Rafael Espindola
68067664c3 Last bit by bit compatibility patch to MCDwarf.cpp: If a FDE with no LSDA is 
assigned to a CIE that requires one, just output a 0.

llvm-svn: 130472
 2011-04-29 03:06:29 +00:00
Rafael Espindola
7c7151512c Add an alternative implementation of CIE and FDE emission that outputs them 
in the same order as the one in CodeGen.

llvm-svn: 130471
 2011-04-29 02:42:28 +00:00
Rafael Espindola
6bd6a70837 Add the getExprForFDESymbol method that responsible for computing the 
expressions used in the FDE to refer to symbols.

llvm-svn: 130437
 2011-04-28 21:04:39 +00:00
Rafael Espindola
c5dac4df2e Add a getExprForPersonalitySymbol method to MCAsmInfo. Use it when 
converting the symbol passed to .cfi_personality into bytes is the file.

llvm-svn: 130400
 2011-04-28 16:09:09 +00:00
Rafael Espindola
349c3298da 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
2eeee8cfef Add a small temporary hack for producing identical eh_frame sections on OS X. 
This removes one of the main advantages of moving eh_frame to MC, but
makes the transition a lot easier to debug (run md5).

llvm-svn: 130379
 2011-04-28 04:04:14 +00:00
Rafael Espindola
bf60fb0a37 Produce the EH_frame# symbols if needed. 
llvm-svn: 130378
 2011-04-28 03:26:11 +00:00
Rafael Espindola
96b07932a3 Forward isFunctionEHFrameSymbolPrivate. If it is false, produce the foo.eh 
symbols.

llvm-svn: 130375
 2011-04-28 02:46:42 +00:00
Rafael Espindola
ae124da625 Force some values to be absolute and align based on the FDE pointers size. A small 
step towards using .cfi_* on OS X.

llvm-svn: 130273
 2011-04-27 01:43:49 +00:00
Chandler Carruth
bab81b9797 Delete the other unused variable in this function. Sorry I missed this 
the first time through.

llvm-svn: 129969
 2011-04-22 01:29:18 +00:00
Chandler Carruth
ea41470726 Remove an unused variable from a function. This is a likely cut-paste-o. 
Silences GCC warning.

I wonder why Clang doesn't warn on this...

llvm-svn: 129968
 2011-04-22 01:21:06 +00:00
Rafael Espindola
5395f44fe8 Compute the size of the FDE encoding instead of hard coding it. Update 
X8664_ELFTargetObjectFile::getFDEEncoding to match reality.

llvm-svn: 129959
 2011-04-22 00:08:43 +00:00
Rafael Espindola
6aea59268a Remove unused argument. 
llvm-svn: 129955
 2011-04-21 23:39:26 +00:00
Rafael Espindola
ea61f22dd3 Don't pass address spaces to EmitULEB128IntValue. 
llvm-svn: 129953
 2011-04-21 23:26:40 +00:00
Rafael Espindola
fd794affe5 Remove LastOffset from the asm parser. 
llvm-svn: 129378
 2011-04-12 18:53:30 +00:00