Commit Graph

149 Commits

Author SHA1 Message Date
Bruno Cardoso Lopes c6c5dbd5b8 Handle null and file symbol on doInitialization
llvm-svn: 77354
2009-07-28 19:25:33 +00:00
Chris Lattner 5e693ed07b Rip all of the global variable lowering logic out of TargetAsmInfo. Since
it is highly specific to the object file that will be generated in the end,
this introduces a new TargetLoweringObjectFile interface that is implemented
for each of ELF/MachO/COFF/Alpha/PIC16 and XCore.

Though still is still a brutal and ugly refactoring, this is a major step
towards goodness.

This patch also:
1. fixes a bunch of dangling pointer problems in the PIC16 backend.
2. disables the TargetLowering copy ctor which PIC16 was accidentally using.
3. gets us closer to xcore having its own crazy target section flags and
   pic16 not having to shadow sections with its own objects.
4. fixes wierdness where ELF targets would set CStringSection but not
   CStringSection_.  Factor the code better.
5. fixes some bugs in string lowering on ELF targets.

llvm-svn: 77294
2009-07-28 03:13:23 +00:00
Bruno Cardoso Lopes 16c5b4fca8 add module identifier to the elf object file
llvm-svn: 77238
2009-07-27 19:32:57 +00:00
Bruno Cardoso Lopes cb364ab3f2 Handle external symbols for ELF and add some static methods to ELFSym
llvm-svn: 77232
2009-07-27 18:54:47 +00:00
Chris Lattner 149465ea06 Eliminate SectionFlags, just embed a SectionKind into Section
instead and drive things based off of that.

llvm-svn: 77184
2009-07-27 05:32:16 +00:00
Chris Lattner e45ff5cc2b make SectionKind know whether a symbol is weak or not in addition
to its classification.

llvm-svn: 77140
2009-07-26 07:00:12 +00:00
Chris Lattner 29151b0218 rename Mergable -> Mergeable and Writable -> Writeable
llvm-svn: 77138
2009-07-26 06:48:26 +00:00
Chris Lattner abd47512f7 two files I missed in the last commit.
llvm-svn: 77137
2009-07-26 06:36:20 +00:00
Chris Lattner fb6867c7db simplify getSectionForMergableConstant to take a SectionKind.
llvm-svn: 77134
2009-07-26 06:26:55 +00:00
Chris Lattner 60f3b73e11 this is (unfortunately) several changes mixed together:
1. Spell SectionFlags::Writeable as "Writable".
2. Add predicates for deriving SectionFlags from SectionKinds.
3. Sink ELF-specific getSectionPrefixForUniqueGlobal impl into
   ELFTargetAsmInfo.
4. Fix SectionFlagsForGlobal to know that BSS/ThreadBSS has the
   BSS bit set (the real fix for PR4619).
5. Fix isSuitableForBSS to not put globals with explicit sections
   set in BSS (which was the reason #4 wasn't fixed earlier).
6. Remove my previous hack for PR4619.

llvm-svn: 77085
2009-07-25 18:57:34 +00:00
Chris Lattner b300a4f988 remove the SelectSectionForMachineConst hook, replacing it with
a new getSectionForMergableConstant hook.  This removes one dependence
of TAI on Type, and provides the hook with enough info to make the 
right decision based on whether the global has relocations etc.

llvm-svn: 76705
2009-07-22 00:28:43 +00:00
Bruno Cardoso Lopes 12e543228d Support adding relocations for data sections, handling the cases where
global declared symbols are initialized with references from other global
symbols.

llvm-svn: 76540
2009-07-21 06:51:32 +00:00
Bruno Cardoso Lopes 447b7fd4bb For PC relative relocations where symbols are defined in the same section they
are referenced, ignore the relocation entry and patch the relocatable field with
the computed symbol offset directly

llvm-svn: 76414
2009-07-20 08:52:02 +00:00
Bruno Cardoso Lopes 50bf9a60e5 Use R_X86_64_32S to handle Jump Table Index relocation entries. Hide TAI usage inside getSection* functions
llvm-svn: 76347
2009-07-18 23:24:01 +00:00
Bruno Cardoso Lopes 484e90b45e Add support to properly reference private symbols on relocation entries.
Use proper relocation type to build relocations for JumpTables (rodata
sections).

llvm-svn: 76326
2009-07-18 19:30:09 +00:00
Bruno Cardoso Lopes 0cded73755 revert one of the loops to use indicies over iterators because there are vector insertions inside the loop
llvm-svn: 76195
2009-07-17 18:02:30 +00:00
Bruno Cardoso Lopes 5dd954b661 Fix coding style issues pointed by Bill.
llvm-svn: 75898
2009-07-16 06:26:41 +00:00
Bruno Cardoso Lopes 2717863900 use std::vector instead of std::list for both Section and Symbol lists because
we care more about random access than insertion/deletion of elements.

llvm-svn: 75828
2009-07-15 20:49:10 +00:00
Chris Lattner 8c9a96b966 Reapply my previous asmprinter changes now with more testing and two
additional bug fixes:

1. The bug that everyone hit was a problem in the asmprinter where it
   would remove $stub but keep the L prefix on a name when emitting the
   indirect symbol.  This is easy to fix by keeping the name of the stub
   and the name of the symbol in a StringMap instead of just keeping a
   StringSet and trying to reconstruct it late.

2. There was a problem printing the personality function.  The current
   logic to print out the personality function from the DWARF information
   is a bit of a cesspool right now that duplicates a bunch of other 
   logic in the asm printer.  The short version of it is that it depends
   on emitting both the L and _ prefix for symbols (at least on darwin)
   and until I can untangle it, it is best to switch the mangler back to
   emitting both prefixes.

llvm-svn: 75646
2009-07-14 18:17:16 +00:00
Torok Edwin fbcc663cbf llvm_unreachable->llvm_unreachable(0), LLVM_UNREACHABLE->llvm_unreachable.
This adds location info for all llvm_unreachable calls (which is a macro now) in
!NDEBUG builds.
In NDEBUG builds location info and the message is off (it only prints
"UREACHABLE executed").

llvm-svn: 75640
2009-07-14 16:55:14 +00:00
Daniel Dunbar eb3e4271e8 Revert r7561{9,8,7,6}, which depend on r75610.
--- Reverse-merging r75619 into '.':
U    lib/Target/DarwinTargetAsmInfo.cpp
U    lib/CodeGen/AsmPrinter/AsmPrinter.cpp
--- Reverse-merging r75618 into '.':
U    lib/CodeGen/ELFWriter.cpp
U    lib/CodeGen/MachOCodeEmitter.cpp
U    lib/CodeGen/MachOWriter.cpp
--- Reverse-merging r75617 into '.':
U    lib/Target/CBackend/CBackend.cpp
--- Reverse-merging r75616 into '.':
U    tools/bugpoint/Miscompilation.cpp
U    tools/lto/LTOCodeGenerator.cpp
U    tools/lto/LTOModule.cpp

llvm-svn: 75638
2009-07-14 16:25:11 +00:00
Chris Lattner 688920e511 Rename getValueName -> getMangledName
llvm-svn: 75618
2009-07-14 06:20:20 +00:00
Bruno Cardoso Lopes ffb38f8d35 Cleanup the global emission and refactor some code
llvm-svn: 75537
2009-07-13 22:40:39 +00:00
Torok Edwin 56d0659726 assert(0) -> LLVM_UNREACHABLE.
Make llvm_unreachable take an optional string, thus moving the cerr<< out of
line.
LLVM_UNREACHABLE is now a simple wrapper that makes the message go away for
NDEBUG builds.

llvm-svn: 75379
2009-07-11 20:10:48 +00:00
Bruno Cardoso Lopes f539f03289 Changed ELFCodeEmitter to inherit from ObjectCodeEmitter
llvm-svn: 74821
2009-07-06 09:26:48 +00:00
Bruno Cardoso Lopes 5661ea68e7 Add the Object Code Emitter class. Original patch by Aaron Gray, I did some
cleanup, removed some #includes and moved Object Code Emitter out-of-line.

llvm-svn: 74813
2009-07-06 05:09:34 +00:00
Bruno Cardoso Lopes 95dd8657ca Factor some code out and support for Jump Table relocations
llvm-svn: 74760
2009-07-03 04:36:26 +00:00
Bruno Cardoso Lopes 6dca2847d9 shrinking down #includes
llvm-svn: 74718
2009-07-02 18:29:24 +00:00
Bruno Cardoso Lopes e364a233c0 Support Constant Pool Sections
Add section symbols to the symbol table

llvm-svn: 74170
2009-06-25 07:36:24 +00:00
Bruno Cardoso Lopes 02a9191b71 Use a default alignment for data and bss sections.
Only pad when the section size > 0 and move the code that deals
with globals initializers to a place we know for sure the global
is initialized.

llvm-svn: 73944
2009-06-23 04:39:27 +00:00
Bruno Cardoso Lopes bd9c94d7af Use different functions to emit the string and symbol tables.
llvm-svn: 73895
2009-06-22 19:29:56 +00:00
Bruno Cardoso Lopes a040566fec Add more methods to gather target specific elf stuff
Support for .text relocations, implementing TargetELFWriter overloaded methods for x86/x86_64.
Use a map to track global values to their symbol table indexes
Code cleanup and small fixes

llvm-svn: 73894
2009-06-22 19:16:16 +00:00
Bruno Cardoso Lopes 2f55027012 Introduce new BinaryObject (blob) class, ELF Writer modified to use it. BinaryObject.h by Aaron Gray
llvm-svn: 73333
2009-06-14 07:53:21 +00:00
Bruno Cardoso Lopes 1656366e4d Support for ELF Visibility
Emission for globals, using the correct data sections
Function alignment can be computed for each target using TargetELFWriterInfo
Some small fixes

llvm-svn: 73201
2009-06-11 19:16:03 +00:00
Bruno Cardoso Lopes f6d9fd20c2 Delete comment and fix typo
llvm-svn: 73040
2009-06-07 21:49:11 +00:00
Bruno Cardoso Lopes e577492a17 Simple ELF32/64 binary files can now be emitted for x86 and x86_64 without
relocation sections.

llvm-svn: 73038
2009-06-07 21:22:38 +00:00
Bruno Cardoso Lopes 1596c3d9b2 Remove elf specific info from ELFWriter.h to Elf.h. Code cleanup and more comments added
llvm-svn: 72982
2009-06-06 03:56:29 +00:00
Bruno Cardoso Lopes d51db005d0 Move ELFCodeEmiter stuff to new files
llvm-svn: 72785
2009-06-03 17:47:27 +00:00
Duncan Sands af9eaa830a Rename PaddedSize to AllocSize, in the hope that this
will make it more obvious what it represents, and stop
it being confused with the StoreSize.

llvm-svn: 71349
2009-05-09 07:06:46 +00:00
Duncan Sands 12da8ce3d2 Introduce new linkage types linkonce_odr, weak_odr, common_odr
and extern_weak_odr.  These are the same as the non-odr versions,
except that they indicate that the global will only be overridden
by an *equivalent* global.  In C, a function with weak linkage can
be overridden by a function which behaves completely differently.
This means that IP passes have to skip weak functions, since any
deductions made from the function definition might be wrong, since
the definition could be replaced by something completely different
at link time.   This is not allowed in C++, thanks to the ODR
(One-Definition-Rule): if a function is replaced by another at
link-time, then the new function must be the same as the original
function.  If a language knows that a function or other global can
only be overridden by an equivalent global, it can give it the
weak_odr linkage type, and the optimizers will understand that it
is alright to make deductions based on the function body.  The
code generators on the other hand map weak and weak_odr linkage
to the same thing.

llvm-svn: 66339
2009-03-07 15:45:40 +00:00
Nate Begeman 18d85e7403 Add support to the JIT for true non-lazy operation. When a call to a function
that has not been JIT'd yet, the callee is put on a list of pending functions
to JIT.  The call is directed through a stub, which is updated with the address
of the function after it has been JIT'd.  A new interface for allocating and
updating empty stubs is provided.

Add support for removing the ModuleProvider the JIT was created with, which
would otherwise invalidate the JIT's PassManager, which is initialized with the
ModuleProvider's Module.

Add support under a new ExecutionEngine flag for emitting the infomration 
necessary to update Function and GlobalVariable stubs after JITing them, by
recording the address of the stub and the name of the GlobalValue.  This allows
code to be copied from one address space to another, where libraries may live
at different virtual addresses, and have the stubs updated with their new
correct target addresses.

llvm-svn: 64906
2009-02-18 08:31:02 +00:00
Rafael Espindola 6de96a1b5d Add the private linkage.
llvm-svn: 62279
2009-01-15 20:18:42 +00:00
Duncan Sands dc020f9c3c Rename getABITypeSize to getTypePaddedSize, as
suggested by Chris.

llvm-svn: 62099
2009-01-12 20:38:59 +00:00
Chris Lattner 8f561c9c97 elf writer really wants the size of the global, not the size
of the pointer to the global.

llvm-svn: 61630
2009-01-04 20:19:20 +00:00
Bill Wendling ac79602005 The llvm::ELFWriter::EmitGlobal() method is calling the
llvm::PATypeHolder::get() method when LLVM is self-hosted in Release
mode. Before the parser changed, there was a definition of llvm::PAHolder::get()
in llvmAsmParser.y. This was probably a bug that no-one noticed.

Explicitly #include the Type.h file as a temporary fix for now.

llvm-svn: 61620
2009-01-04 01:47:14 +00:00
Evan Cheng 0b77319742 Fix MachineCodeEmitter to use uintptr_t instead of intptr_t. This avoids some overflow issues. Patch by Thomas Jablin.
llvm-svn: 60828
2008-12-10 02:32:19 +00:00
Evan Cheng b31a717527 Rename startFunctionStub to startGVStub since it's also used for GV non-lazy ptr.
llvm-svn: 58897
2008-11-08 08:02:53 +00:00
Dan Gohman a79db30d28 Tidy up several unbeseeming casts from pointer to intptr_t.
llvm-svn: 55779
2008-09-04 17:05:41 +00:00
Owen Anderson 9371964f47 Use raw_ostream throughout the AsmPrinter.
llvm-svn: 55092
2008-08-21 00:14:44 +00:00
Dale Johannesen ce4396bc92 Add CommonLinkage; currently tentative definitions
are represented as "weak", but there are subtle differences
in some cases on Darwin, so we need both.  The intent
is that "common" will behave identically to "weak" unless
somebody changes their target to do something else.
No functional change as yet.

llvm-svn: 51118
2008-05-14 20:12:51 +00:00
Dan Gohman e3a63ba3cd Fix a bug in the ELF writer that caused it to produce malformed
ELF headers. The ELF writer still isn't generally usable though.

llvm-svn: 50652
2008-05-05 16:48:32 +00:00
Nicolas Geoffray a7557dfe71 Correlate stubs with functions in JIT: when emitting a stub, the JIT tells the memory manager which function
the stub will resolve.

llvm-svn: 49814
2008-04-16 20:46:05 +00:00
Dan Gohman 24570836b2 Use PassManagerBase instead of FunctionPassManager for functions
that merely add passes. This allows them to be used with either
FunctionPassManager or PassManager, or even with a custom new
kind of pass manager.

llvm-svn: 48256
2008-03-11 22:29:46 +00:00
Nicolas Geoffray 21ad494f67 Enable exception handling int JIT
llvm-svn: 47079
2008-02-13 18:39:37 +00:00
Duncan Sands 05837edae7 Use getPreferredAlignmentLog or getPreferredAlignment
to get the alignment of global variables, rather than
using hand-made versions.

llvm-svn: 46495
2008-01-29 06:23:44 +00:00
Chris Lattner f3ebc3f3d2 Remove attribution from file headers, per discussion on llvmdev.
llvm-svn: 45418
2007-12-29 20:36:04 +00:00
Dan Gohman 8a332b235d Add explicit keywords, and fix a minor typo that they uncovered.
llvm-svn: 45034
2007-12-14 15:41:34 +00:00
Duncan Sands 283207a71c Eliminate the remaining uses of getTypeSize. This
should only effect x86 when using long double.  Now
12/16 bytes are output for long double globals (the
exact amount depends on the alignment).  This brings
globals in line with the rest of LLVM: the space
reserved for an object is now always the ABI size.
One tricky point is that only 10 bytes should be
output for long double if it is a field in a packed
struct, which is the reason for the additional
argument to EmitGlobalConstant.

llvm-svn: 43688
2007-11-05 00:04:43 +00:00
Devang Patel 8c78a0bff0 Drop 'const'
llvm-svn: 36662
2007-05-03 01:11:54 +00:00
Devang Patel e95c6ad802 Use 'static const char' instead of 'static const int'.
Due to darwin gcc bug, one version of darwin linker coalesces
static const int, which defauts PassID based pass identification.

llvm-svn: 36652
2007-05-02 21:39:20 +00:00
Devang Patel 09f162ca6a Do not use typeinfo to identify pass in pass manager.
llvm-svn: 36632
2007-05-01 21:15:47 +00:00
Chris Lattner 945e437c65 Generalize TargetData strings, to support more interesting forms of data.
Patch by Scott Michel.

llvm-svn: 34266
2007-02-14 05:52:17 +00:00
Bill Wendling 3c4d37a531 Add function to create a file writer.
llvm-svn: 34031
2007-02-08 01:35:27 +00:00
Bill Wendling 3814e72ed1 Use TargetELFWriterInfo class.
llvm-svn: 33573
2007-01-27 02:55:44 +00:00
Chris Lattner 50ee0e40e5 Teach TargetData to handle 'preferred' alignment for each target, and use
these alignment amounts to align scalars when we can.  Patch by Scott Michel!

llvm-svn: 33409
2007-01-20 22:35:55 +00:00
Bill Wendling e750f61ac5 Have the OutputBuffer take the is64Bit and isLittleEndian booleans.
llvm-svn: 33316
2007-01-18 01:23:11 +00:00
Bill Wendling cd9c1f035a Changed to use the OutputBuffer instead of the methods in MachO and ELF
writers.

llvm-svn: 33311
2007-01-17 22:22:31 +00:00
Bill Wendling 38ee6519b7 Revert patch.
llvm-svn: 33298
2007-01-17 09:06:13 +00:00
Bill Wendling dcc324b15b Use the methods in the TargetObjInfo object instead of internal methods.
llvm-svn: 33289
2007-01-17 03:49:21 +00:00
Bill Wendling f3baad3ee1 Changed llvm_ostream et all to OStream. llvm_cerr, llvm_cout, llvm_null, are
now cerr, cout, and NullStream resp.

llvm-svn: 32298
2006-12-07 01:30:32 +00:00
Bill Wendling 5c3966aa68 Converted to using llvm streams instead of <iostream>s
llvm-svn: 31992
2006-11-29 00:39:47 +00:00
Evan Cheng 9fd73b8a7f Match MachineCodeEmitter changes.
llvm-svn: 31787
2006-11-16 20:04:04 +00:00
Reid Spencer de46e48420 For PR786:
Turn on -Wunused and -Wno-unused-parameter. Clean up most of the resulting
fall out by removing unused variables. Remaining warnings have to do with
unused functions (I didn't want to delete code without review) and unused
variables in generated code. Maintainers should clean up the remaining
issues when they see them. All changes pass DejaGnu tests and Olden.

llvm-svn: 31380
2006-11-02 20:25:50 +00:00
Owen Anderson 8c2c1e90c4 Refactor a bunch of includes so that TargetMachine.h doesn't have to include
TargetData.h.  This should make recompiles a bit faster with my current
TargetData tinkering.

llvm-svn: 28238
2006-05-12 06:33:49 +00:00
Chris Lattner 1d8ee1fc80 Suck block address tracking out of targets into the JIT Emitter. This
simplifies the MachineCodeEmitter interface just a little bit and makes
BasicBlocks work like constant pools and jump tables.

llvm-svn: 28082
2006-05-03 17:10:41 +00:00
Owen Anderson 20a631fde7 Refactor TargetMachine, pushing handling of TargetData into the target-specific subclasses. This has one caller-visible change: getTargetData() now returns a pointer instead of a reference.
This fixes PR 759.

llvm-svn: 28074
2006-05-03 01:29:57 +00:00
Chris Lattner d8b192ba3b Change the BasicBlockAddrs map to be a vector, indexed by MBB number.
llvm-svn: 28069
2006-05-03 00:32:55 +00:00
Chris Lattner b8065a9a3a Several related changes:
1. Change several methods in the MachineCodeEmitter class to be pure virtual.
2. Suck emitConstantPool/initJumpTableInfo into startFunction, removing them
   from the MachineCodeEmitter interface, and reducing the amount of target-
   specific code.
3. Change the JITEmitter so that it allocates constantpools and jump tables
   *right* next to the functions that they belong to, instead of in a separate
   pool of memory.  This makes all memory for a function be contiguous, and
   means the JITEmitter only tracks one block of memory now.

llvm-svn: 28065
2006-05-02 23:22:24 +00:00
Chris Lattner 23621fe8f4 Do not make the JIT memory manager manage the memory for globals. Instead
just have the JIT malloc them.

llvm-svn: 28062
2006-05-02 21:57:51 +00:00
Chris Lattner c9aa3715e8 Refactor the machine code emitter interface to pull the pointers for the current
code emission location into the base class, instead of being in the derived classes.

This change means that low-level methods like emitByte/emitWord now are no longer
virtual (yaay for speed), and we now have a framework to support growable code
segments.  This implements feature request #1 of PR469.

llvm-svn: 28059
2006-05-02 18:27:26 +00:00
Chris Lattner 67a3aa2aaa Remove dead method
llvm-svn: 28055
2006-05-02 17:20:28 +00:00
Nate Begeman 4ca2ea5b43 JumpTable support! What this represents is working asm and jit support for
x86 and ppc for 100% dense switch statements when relocations are non-PIC.
This support will be extended and enhanced in the coming days to support
PIC, and less dense forms of jump tables.

llvm-svn: 27947
2006-04-22 18:53:45 +00:00
Duraid Madina 26b037e762 add these so I can be less naughty
llvm-svn: 25034
2005-12-28 06:29:02 +00:00
Chris Lattner 4f827446da nuke blank line
llvm-svn: 24278
2005-11-10 18:49:46 +00:00
Jeff Cohen 486e36cfde Fix VC++ constant truncation warning.
llvm-svn: 22907
2005-08-19 16:19:21 +00:00
Andrew Lenharth 3faa82219a new is not a valid default anywhere, so make this pure virtual
llvm-svn: 22542
2005-07-28 18:13:59 +00:00
Jeff Cohen 5f4ef3c5a8 Eliminate all remaining tabs and trailing spaces.
llvm-svn: 22523
2005-07-27 06:12:32 +00:00
Chris Lattner a5998ce94f Only get the .bss and .data sections when needed instead of unconditionally.
This allows is to not emit empty sections when .data or .bss is not used.

llvm-svn: 22457
2005-07-16 17:41:06 +00:00
Chris Lattner 363964e53d Refactor getSection() method to make it easier to use.
llvm-svn: 22455
2005-07-16 17:36:04 +00:00
Chris Lattner fd44500427 Major refactor of the ELFWriter code. Instead of building up one big
vector that represents the .o file at once, build up a vector for each
section of the .o file.  This is needed because the .o file writer needs
to be able to switch between sections as it emits them (e.g. switch
between the .text section and the .rel section when emitting code).

This patch has no functionality change.

llvm-svn: 22453
2005-07-16 08:01:13 +00:00
Chris Lattner 298ac69934 Add support for 64-bit elf files
llvm-svn: 22400
2005-07-12 06:57:52 +00:00
Jeff Cohen 33b8232ce0 VC++ demands that the function returns a value
llvm-svn: 22393
2005-07-12 02:53:33 +00:00
Chris Lattner 449e07f390 Clean up code, no functionality changes.
llvm-svn: 22382
2005-07-11 06:34:30 +00:00
Chris Lattner 5bacb00452 Emit a symbol table entry for each function we output to the ELF file. This
allows objdump to know which function we are emitting to:

00000000 <foo>:     <----
   0:   b8 01 00 00 00          mov    $0x1,%eax
   5:   03 44 24 04             add    0x4(%esp,1),%eax
   9:   c3                      ret

... and allows .o files to be useful for linking :)

llvm-svn: 22378
2005-07-11 06:17:35 +00:00
Chris Lattner 2244f73437 add code to emit the .text section to the section header.
Add a *VERY INITIAL* machine code emitter class.  This is enough to take
this C function:
int foo(int X) { return X +1; }

and make objdump produce the following:

$ objdump -d t-llvm.o

t-llvm.o:     file format elf32-i386

Disassembly of section .text:

00000000 <.text>:
   0:   b8 01 00 00 00          mov    $0x1,%eax
   5:   03 44 24 04             add    0x4(%esp,1),%eax
   9:   c3                      ret


Anything using branches or refering to the constant pool or requiring
relocations will not work yet.

llvm-svn: 22375
2005-07-11 05:17:18 +00:00
Chris Lattner dfe33bc837 Use a name mangler object to uniquify names and remove nonstandard
characters from them.

llvm-svn: 22371
2005-07-11 03:11:47 +00:00
Chris Lattner 748de6e248 Add support for emitting a .data section and .bss section.
Add support for emitting external and .bss symbols.

llvm-svn: 22358
2005-07-08 05:47:00 +00:00
Chris Lattner 1932f5c9be Add support for emitting the symbol table (and its string table) of the
module to the ELF file.  Test it by adding support for emitting common
symbols.  This allows us to compile this:

%X = weak global int 0
%Y = weak global int 0
%Z = weak global int 0

to an elf file that 'readelf's this:

Symbol table '.symtab' contains 4 entries:
   Num:    Value  Size Type    Bind   Vis      Ndx Name
     0: 00000000     0 NOTYPE  LOCAL  DEFAULT  UND
     1: 00000004     4 OBJECT  GLOBAL DEFAULT  COM X
     2: 00000004     4 OBJECT  GLOBAL DEFAULT  COM Y
     3: 00000004     4 OBJECT  GLOBAL DEFAULT  COM Z

llvm-svn: 22343
2005-07-07 07:02:20 +00:00
Chris Lattner 386b151ce6 iniital checkin of ELFWriter implementation
For now, the elf writer is only capable of emitting an empty elf file, with
a section table and a section table string table.  This will be enhanced
in the future :)

llvm-svn: 22291
2005-06-27 06:29:00 +00:00