Commit Graph

131 Commits

Author SHA1 Message Date
Kevin Enderby
32c1a82a6b Fix for PR14264 cause by commit r167237 which did not take into account a
possible buffer change with a .macro directive.

rdar://12637628


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167408 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-05 21:55:41 +00:00
Kevin Enderby
938482f522 Add support for generating dwarf debugging info with assembly files
run through the 'C' preprocessor.  That is pick up the file name
and line numbers from the cpp hash file line comments for the
dwarf file and line numbers tables.

rdar://9275556



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167237 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-01 17:31:35 +00:00
Jim Grosbach
b4316028b3 MachO: direct-to-object attribute for data-in-code markers.
The target backend can support data-in-code load commands even when
the assembler doesn't, or vice-versa. Allow targets to opt-in for
direct-to-object.

PR13973.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164974 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-01 22:20:54 +00:00
Jim Grosbach
b7abea0840 X86_32: Large Symbol+Offset relocations.
If the offset is more than 24-bits, it won't fit in a scattered
relocation offset field, so we fall back to using a non-scattered
relocation.

rdar://12358909

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164724 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-26 21:27:45 +00:00
Jim Grosbach
fe2d5f8487 ARM: Darwin BL/BLX relocations to out-of-range symbols.
When a BL/BLX references a symbol in the same translation unit that is
out of range, use an external relocation. The linker will use this to
generate a branch island rather than a direct reference, allowing the
relocation to resolve correctly.

rdar://12359919

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164615 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-25 18:07:17 +00:00
Jim Grosbach
3f90a4c42d Assembler: Darwin variables defined via .set are no-dead-strip.
For gas compatibility.

rdar://12219394

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163854 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-13 23:11:31 +00:00
Bill Wendling
ef920552d4 Add .pushsection', .popsection', and `.previous' directives to Darwin ASM.
There are situations where inline ASM may want to change the section -- for
instance, to create a variable in the .data section. However, it cannot do this
without (potentially) restoring to the wrong section. E.g.:

  asm volatile (".section __DATA, __data\n\t"
                ".globl _fnord\n\t"
                "_fnord: .quad 1f\n\t"
                ".text\n\t"
                "1:" :::);

This may be wrong if this is inlined into a function that has a "section"
attribute. The user should use `.pushsection' and `.popsection' here instead.

The addition of `.previous' is added for completeness.
<rdar://problem/12048387>


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161477 91177308-0d34-0410-b5e6-96231b3b80d8
2012-08-08 06:30:30 +00:00
Kevin Enderby
5af4de18ef Fix a bug in ARMMachObjectWriter::RecordRelocation() in ARMMachObjectWriter.cpp
where the other_half of the movt and movw relocation entries needs to get set
and only with the 16 bits of the other half.

rdar://10038370


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160978 91177308-0d34-0410-b5e6-96231b3b80d8
2012-07-30 18:46:15 +00:00
Jim Grosbach
3e96531186 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

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157062 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-18 19:12:01 +00:00
Kevin Enderby
59c15e920c 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157031 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-18 00:13:56 +00:00
Kevin Enderby
e545c4e45d 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156850 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-15 20:20:50 +00:00
Kevin Enderby
2d524b0765 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!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156118 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-03 22:41:56 +00:00
Eli Bendersky
cc85160672 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





git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153408 91177308-0d34-0410-b5e6-96231b3b80d8
2012-03-25 09:02:19 +00:00
Jim Grosbach
07cdd80ccc ARM non-scattered MachO relocations for movw/movt.
Needed when building -mdynamic-no-pic code.

rdar://10459256

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153097 91177308-0d34-0410-b5e6-96231b3b80d8
2012-03-20 17:25:45 +00:00
Richard Trieu
562a67db32 Fix flags for test in MC/MachO/ARM/empty-function-nop.ll
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151778 91177308-0d34-0410-b5e6-96231b3b80d8
2012-03-01 00:29:09 +00:00
Jim Grosbach
c01810eeb7 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

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151673 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-28 23:53:30 +00:00
Eli Bendersky
0f0c411079 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.




git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150664 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-16 06:28:33 +00:00
Kevin Enderby
d49b2a7a9d 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149442 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-31 23:02:57 +00:00
Jim Grosbach
c389af94b6 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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@148865 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-24 21:45:25 +00:00
Jim Grosbach
904b7be27e Add testcase.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@148454 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-19 01:36:59 +00:00
Jim Grosbach
256ba4f42a 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

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@148424 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-18 21:54:16 +00:00
Jim Grosbach
8b9300b972 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



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@148341 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-17 22:14:39 +00:00
Jim Grosbach
283f1fff47 Tidy up.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@148339 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-17 22:03:42 +00:00
Kevin Enderby
38fdb7d9fc 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


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147860 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-10 17:52:29 +00:00
Nick Lewycky
5a3d4c9830 Don't rely on a particular version string for llvm.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146456 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-13 00:34:14 +00:00
Chandler Carruth
59164b731b Don't assume things about the exact details of the LLVM version number,
such as what VCS information is attached.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146333 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-10 21:40:31 +00:00
Kevin Enderby
94c2e85bea 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


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146262 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-09 18:09:40 +00:00
Jim Grosbach
577b09155f 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.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146054 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-07 19:46:59 +00:00
Jim Grosbach
d552a644be Tidy up. Move MachO tests to MachO directory.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146038 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-07 17:50:28 +00:00
NAKAMURA Takumi
18851edbc4 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)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145925 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-06 06:48:26 +00:00
NAKAMURA Takumi
286ea03382 test/MC: Move relax-thumb2-branches.s from MC/MachO/ to MC/ARM.
MC/MachO assumes x86.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145916 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-06 03:56:05 +00:00
Jim Grosbach
d9a6e8978d Fix ARM handling of tBcc branch relaxation.
rdar://10069056

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145885 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-06 01:08:19 +00:00
Kevin Enderby
064e48a3dc 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


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143521 91177308-0d34-0410-b5e6-96231b3b80d8
2011-11-01 23:39:05 +00:00
Kevin Enderby
5afc19002e 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139316 91177308-0d34-0410-b5e6-96231b3b80d8
2011-09-08 20:53:44 +00:00
Evan Cheng
5fbe5e783e 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


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138504 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-24 22:31:37 +00:00
Benjamin Kramer
0d46ccfc5c MachOWriter: Don't crash on fixups with arithmetic, emit a relocation instead. This matches what as does.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137414 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-12 01:51:29 +00:00
Jim Grosbach
75c2b2028b Move ARM-specific test to ARM directory.
Hopefully make the x86-target-only Windows bots happy.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133856 91177308-0d34-0410-b5e6-96231b3b80d8
2011-06-25 01:53:17 +00:00
Jim Grosbach
56fc642000 Testcase for r133818
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133823 91177308-0d34-0410-b5e6-96231b3b80d8
2011-06-24 20:59:01 +00:00
Rafael Espindola
e3a0e987f3 On MachO, unlike ELF, there should be no relocation to produce the CIE pointer.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131149 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-10 20:59:42 +00:00
Daniel Dunbar
c8497b6a25 MCAsmLayout: Add support for computing the symbol offset of variables. Not
currently used, because variables don't get reported as being "defined".

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130524 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-29 18:20:20 +00:00
Daniel Dunbar
90604ab725 MC: Change variable symbols to be recognized as defined, by assigning their sections based on FindAssociatedSection().
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130523 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-29 18:20:17 +00:00
Chris Lattner
7a2bdde0a0 Fix a ton of comment typos found by codespell. Patch by
Luis Felipe Strano Moraes!



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129558 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-15 05:18:47 +00:00
Daniel Dunbar
c6cf43d258 MC: Add support for disabling "temporary label" behavior. Useful for debugging
on Darwin.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128430 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-28 22:49:15 +00:00
Daniel Dunbar
8d06ffca9b MC/Mach-O: Fix regression introduced in r126127, this assignment shouldn't have
been removed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127812 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-17 16:25:24 +00:00
Devang Patel
3fe3424a21 Move arch specific tests in arch specific directories.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126401 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-24 19:06:27 +00:00
Daniel Dunbar
b2624eda5a MC/Mach-O/Thumb: Set the thumb bit in the symbol table.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122630 91177308-0d34-0410-b5e6-96231b3b80d8
2010-12-29 14:14:06 +00:00
Daniel Dunbar
e862453806 MC/Mach-O/Thumb: Select appropriate relocation types for Thumb.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122583 91177308-0d34-0410-b5e6-96231b3b80d8
2010-12-27 14:49:49 +00:00
Daniel Dunbar
4010dd72b8 MC/Mach-O/ARM: Start handling some Thumb branches.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122547 91177308-0d34-0410-b5e6-96231b3b80d8
2010-12-24 16:41:46 +00:00
Daniel Dunbar
72123334ad MC/Mach-O/ARM: Don't try to use scattered relocs for BR24 fixups.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122441 91177308-0d34-0410-b5e6-96231b3b80d8
2010-12-22 21:26:43 +00:00
Rafael Espindola
ecbbf40d5c Add reduced test from 8845.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122438 91177308-0d34-0410-b5e6-96231b3b80d8
2010-12-22 21:15:13 +00:00