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Commit Graph

123 Commits

Author SHA1 Message Date
Jim Grosbach
343a996ca5 Refactor data-in-code annotations.
Use a dedicated MachO load command to annotate data-in-code regions.
This is the same format the linker produces for final executable images,
allowing consistency of representation and use of introspection tools
for both object and executable files.

Data-in-code regions are annotated via ".data_region"/".end_data_region"
directive pairs, with an optional region type.

data_region_directive := ".data_region" { region_type }
region_type := "jt8" | "jt16" | "jt32" | "jta32"
end_data_region_directive := ".end_data_region"

The previous handling of ARM-style "$d.*" labels was broken and has
been removed. Specifically, it didn't handle ARM vs. Thumb mode when
marking the end of the section.

rdar://11459456

llvm-svn: 157062
2012-05-18 19:12:01 +00:00
Kevin Enderby
ef39671f98 Fixed a bug in llvm-objdump when disassembling using -macho option for a binary
containing no symbols.  Fixed the crash and fixed it not disassembling anything.

llvm-svn: 157031
2012-05-18 00:13:56 +00:00
Kevin Enderby
8feefef6ff Add a test case for r156840, a fix to llvm-objdump when disassembling using
-macho to disassemble the last symbol to the end of the section.

llvm-svn: 156850
2012-05-15 20:20:50 +00:00
Kevin Enderby
1ab00df6a7 Fix issues with the ARM bl and blx thumb instructions and the J1 and J2 bits
for the assembler and disassembler.  Which were not being set/read correctly
for offsets greater than 22 bits in some cases.

Changes to lib/Target/ARM/ARMAsmBackend.cpp from Gideon Myles!

llvm-svn: 156118
2012-05-03 22:41:56 +00:00
Eli Bendersky
3ef88c1833 Continue cleanup of LIT, getting rid of the remaining artifacts from dejagnu
* Removed test/lib/llvm.exp - it is no longer needed 
* Deleted the dg.exp reading code from test/lit.cfg. There are no dg.exp files
  left in the test suite so this code is no longer required. test/lit.cfg is
  now much shorter and clearer 
* Removed a lot of duplicate code in lit.local.cfg files that need access to
  the root configuration, by adding a "root" attribute to the TestingConfig
  object. This attribute is dynamically computed to provide the same
  information as was previously provided by the custom getRoot functions. 
* Documented the config.root attribute in docs/CommandGuide/lit.pod

llvm-svn: 153408
2012-03-25 09:02:19 +00:00
Jim Grosbach
b562c4f2fa ARM non-scattered MachO relocations for movw/movt.
Needed when building -mdynamic-no-pic code.

rdar://10459256

llvm-svn: 153097
2012-03-20 17:25:45 +00:00
Richard Trieu
4eaabe29a7 Fix flags for test in MC/MachO/ARM/empty-function-nop.ll
llvm-svn: 151778
2012-03-01 00:29:09 +00:00
Jim Grosbach
cb853fbdc9 ARM implement TargetInstrInfo::getNoopForMachoTarget()
Without this hook, functions w/ a completely empty body (including no
epilogue) will cause an MCEmitter assertion failure.

For example,
define internal fastcc void @empty_function() {
  unreachable
}

rdar://10947471

llvm-svn: 151673
2012-02-28 23:53:30 +00:00
Eli Bendersky
4afdeeb682 Replace all instances of dg.exp file with lit.local.cfg, since all tests are run with LIT now and now Dejagnu. dg.exp is no longer needed.
Patch reviewed by Daniel Dunbar. It will be followed by additional cleanup patches.

llvm-svn: 150664
2012-02-16 06:28:33 +00:00
Kevin Enderby
cb876a7560 Fixed a crash in llvm-mc for Mach-O when a symbol difference expression uses a
symbol from an assignment.  In this case the symbol did not have a fragment so
MCObjectWriter::IsSymbolRefDifferenceFullyResolved() should not have been
calling IsSymbolRefDifferenceFullyResolvedImpl() with a NULL fragment and should
just have returned false in that case.

llvm-svn: 149442
2012-01-31 23:02:57 +00:00
Jim Grosbach
012239e10a ARM Darwin symbol ref differences w/o subsection-via-symbols.
When not using subsections via symbols, the assembler can resolve
symbol differences (including pcrel references) to non-local
labels at assembly time, not just those in the same atom.

llvm-svn: 148865
2012-01-24 21:45:25 +00:00
Jim Grosbach
48afa48c3e Add testcase.
llvm-svn: 148454
2012-01-19 01:36:59 +00:00
Jim Grosbach
a1e220fa82 Thumb2 relaxation for LDR(literal).
If the fixup is out of range for the Thumb1 instruction, relax it
to the Thumb2 encoding instead.

rdar://10711829

llvm-svn: 148424
2012-01-18 21:54:16 +00:00
Jim Grosbach
e6d2a7a097 MC tweak symbol difference resolution for non-local symbols.
When the non-local symbol in the expression is in the same fragment
as the second symbol, the assembler can still evaluate the expression
without needing a relocation.

For example, on ARM:
_foo:
	ldr lr, (_foo - 4)

rdar://10348687

llvm-svn: 148341
2012-01-17 22:14:39 +00:00
Jim Grosbach
095e519996 Tidy up.
llvm-svn: 148339
2012-01-17 22:03:42 +00:00
Kevin Enderby
75f4b470f9 Various crash reporting tools have a problem with the dwarf generated for
assembly source when it generates the TAG_subprogram dwarf debug info for
the labels that have nothing between them as in this bit of assembly source:

% cat ZeroLength.s 
_func1:
_func2:
 nop

One solution would be to not emit the subsequent labels with the same address
and use the next label with a different address or the end of the section for
the AT_high_pc value of the TAG_subprogram.

Turns out in llvm-mc it is not possible in all cases to determine of two
symbols have the same value at the point we put out the TAG_subprogram dwarf
debug info.

So we will have llvm-mc instead of putting out TAG_subprogram's put out
DW_TAG_label's.  And the DW_TAG_label does not have a AT_high_pc value which
avoids the problem.

This commit is only the functional change to make the diffs clear as to what is
really being changed.  The next commit will be to clean up the names of such
things like MCGenDwarfSubprogramEntry to something like MCGenDwarfLabelEntry.

rdar://10666925

llvm-svn: 147860
2012-01-10 17:52:29 +00:00
Nick Lewycky
90a4c39a28 Don't rely on a particular version string for llvm.
llvm-svn: 146456
2011-12-13 00:34:14 +00:00
Chandler Carruth
afb8199f38 Don't assume things about the exact details of the LLVM version number,
such as what VCS information is attached.

llvm-svn: 146333
2011-12-10 21:40:31 +00:00
Kevin Enderby
63cf89d532 The second part of support for generating dwarf for assembly source files. This
generates the dwarf Compile Unit DIE and a dwarf subprogram DIE for each
non-temporary label.

The next part will be to get the clang driver to enable this when assembling
a .s file.  rdar://9275556

llvm-svn: 146262
2011-12-09 18:09:40 +00:00
Jim Grosbach
2f57374e32 Darwin assembler improved relocs when w/o subsections_via_symbols.
When the file isn't being built with subsections-via-symbols, symbol
differences involving non-local symbols can be resolved more aggressively.
Needed for gas compatibility.

llvm-svn: 146054
2011-12-07 19:46:59 +00:00
Jim Grosbach
61d2b8b2f9 Tidy up. Move MachO tests to MachO directory.
llvm-svn: 146038
2011-12-07 17:50:28 +00:00
NAKAMURA Takumi
ed2be25205 test/MC: Introduce MC/MachO/ARM, and relocate relax-thumb2-branches.s into it.
FIXME: Restore more other arch-dependent MachO tests. (eg. r126401 and r133856)
llvm-svn: 145925
2011-12-06 06:48:26 +00:00
NAKAMURA Takumi
ea8cc0e506 test/MC: Move relax-thumb2-branches.s from MC/MachO/ to MC/ARM.
MC/MachO assumes x86.

llvm-svn: 145916
2011-12-06 03:56:05 +00:00
Jim Grosbach
0fd3f58ea2 Fix ARM handling of tBcc branch relaxation.
rdar://10069056

llvm-svn: 145885
2011-12-06 01:08:19 +00:00
Kevin Enderby
b5dc88b394 Fixed a bug in the code to create a dwarf file and directory table entires when
it is separating the directory part from the basename of the FileName.  Noticed 
that this:

  .file 1 "dir/foo"

when assembled got the two parts switched.  Using the Mac OS X dwarfdump tool
it can be seen easily:

% dwarfdump -a a.out
include_directories[  1] = 'foo'
                Dir  Mod Time   File Len   File Name
                ---- ---------- ---------- ---------------------------
file_names[  1]    1 0x00000000 0x00000000 dir
...

Which should be:
...
include_directories[  1] = 'dir'
                Dir  Mod Time   File Len   File Name
                ---- ---------- ---------- ---------------------------
file_names[  1]    1 0x00000000 0x00000000 foo

llvm-svn: 143521
2011-11-01 23:39:05 +00:00
Kevin Enderby
16f9df1f05 Fix a Darwin x86_64 special case of a jmp to a temporary symbol from an atom
without a base symbol that must not have a relocation entry.

llvm-svn: 139316
2011-09-08 20:53:44 +00:00
Evan Cheng
7bfc442b2d Some autoconf tests use module level inline asm to test compiler's handling of
.cfi_startproc. e.g. libffi:

 $ cat confopt.c 
asm (".cfi_startproc\n\t.cfi_endproc");

int main () { return 0; }

Teach MC / dwarf emission to handle these cfi directives which essentially
create an empty frame.

rdar://10017184

llvm-svn: 138504
2011-08-24 22:31:37 +00:00
Benjamin Kramer
e404b3e2d1 MachOWriter: Don't crash on fixups with arithmetic, emit a relocation instead. This matches what as does.
llvm-svn: 137414
2011-08-12 01:51:29 +00:00
Jim Grosbach
f8b05a7bbb Move ARM-specific test to ARM directory.
Hopefully make the x86-target-only Windows bots happy.

llvm-svn: 133856
2011-06-25 01:53:17 +00:00
Jim Grosbach
c10ef9d30c Testcase for r133818
llvm-svn: 133823
2011-06-24 20:59:01 +00:00
Rafael Espindola
e8890f4b16 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
Daniel Dunbar
9a87852114 MCAsmLayout: Add support for computing the symbol offset of variables. Not
currently used, because variables don't get reported as being "defined".

llvm-svn: 130524
2011-04-29 18:20:20 +00:00
Daniel Dunbar
1488659798 MC: Change variable symbols to be recognized as defined, by assigning their sections based on FindAssociatedSection().
llvm-svn: 130523
2011-04-29 18:20:17 +00:00
Chris Lattner
0304b82f80 Fix a ton of comment typos found by codespell. Patch by
Luis Felipe Strano Moraes!

llvm-svn: 129558
2011-04-15 05:18:47 +00:00
Daniel Dunbar
5d8c7d0d36 MC: Add support for disabling "temporary label" behavior. Useful for debugging
on Darwin.

llvm-svn: 128430
2011-03-28 22:49:15 +00:00
Daniel Dunbar
0e9d7aeb1f MC/Mach-O: Fix regression introduced in r126127, this assignment shouldn't have
been removed.

llvm-svn: 127812
2011-03-17 16:25:24 +00:00
Devang Patel
bac565c8a3 Move arch specific tests in arch specific directories.
llvm-svn: 126401
2011-02-24 19:06:27 +00:00
Daniel Dunbar
9ee74282a6 MC/Mach-O/Thumb: Set the thumb bit in the symbol table.
llvm-svn: 122630
2010-12-29 14:14:06 +00:00
Daniel Dunbar
2d0cf8e149 MC/Mach-O/Thumb: Select appropriate relocation types for Thumb.
llvm-svn: 122583
2010-12-27 14:49:49 +00:00
Daniel Dunbar
592854a10a MC/Mach-O/ARM: Start handling some Thumb branches.
llvm-svn: 122547
2010-12-24 16:41:46 +00:00
Daniel Dunbar
e6ec0e7149 MC/Mach-O/ARM: Don't try to use scattered relocs for BR24 fixups.
llvm-svn: 122441
2010-12-22 21:26:43 +00:00
Rafael Espindola
5004de4d8b Add reduced test from 8845.
llvm-svn: 122438
2010-12-22 21:15:13 +00:00
Daniel Dunbar
cb8ac619a2 MC/Mach-O/ARM: We always use the SECTDIFF reloc type on ARM, which is
esp. important given that the LOCAL_SECTDIFF enumeration got redefined.

llvm-svn: 122412
2010-12-22 16:52:19 +00:00
Daniel Dunbar
e44a2c1166 MC/Mach-O/ARM: Add enough relocation logic to get BR24 relocations.
llvm-svn: 122407
2010-12-22 16:19:24 +00:00
Daniel Dunbar
1f9fd0b79b MC/Expr: Implemnt more aggressive folding during symbol evaluation using
IsSymbolRefDifferenceFullyResolved(). For example, we will now fold away
something like:
--
_a:
...
L0:
...
L1:
...
.long (L1 - L0) / 2
--

llvm-svn: 122043
2010-12-17 05:50:33 +00:00
Rafael Espindola
94d026d157 Relax alignment fragments.
With this we don't need the EffectiveSize field anymore. Without that field
LayoutFragment only updates offsets and we don't need to invalidate the
current fragment when it is relaxed (only the ones following it).

This is also a very small improvement in the accuracy of the layout info as
we now use the after relaxation size immediately.

llvm-svn: 121857
2010-12-15 08:45:53 +00:00
Rafael Espindola
f55f520a7a Patch by David Meyer to avoid a O(N^2) behaviour when relaxing fragments.
Since we now don't update addresses so early, we might relax a bit more than
we need to. This is simillar to the issue in PR8467.

llvm-svn: 121856
2010-12-15 07:39:29 +00:00
Rafael Espindola
866531d633 Fix absolute recording of differences of symbols in two sections. Reduced from ctor_dtor_count-2.cpp.
llvm-svn: 121152
2010-12-07 17:12:32 +00:00
Rafael Espindola
da64b6aa50 Fix relocations with weak definitions.
llvm-svn: 121114
2010-12-07 05:57:28 +00:00
Rafael Espindola
9ede5ef045 Fix pcrel relocations that cross sections.
llvm-svn: 121107
2010-12-07 03:50:14 +00:00