Commit Graph

23 Commits

Author SHA1 Message Date
Rafael Espindola
85f2ecc697 Sorry for such a large commit. The summary is that only MachO cares about the
actuall addresses in a .o file, so it is better to let the MachO writer compute
it.

This is good for two reasons. First, areas that shouldn't care about
addresses now don't have access to it. Second, the layout of each section
is independent. I should use this in a subsequent commit to speed it up.

Most of the patch is just removing the section address computation. The two
interesting parts are the change on how we handle padding in the end
of sections and how MachO can get the address of a-b when a and b are in
different sections.

Since now the expression evaluation normally doesn't know the section address,
it will think that a-b needs relocation and let the MachO writer know. Once
it has computed the section addresses, it calls back the expression evaluation
with the section addresses to resolve these expressions.

The remaining problem is the handling of padding. Currently it will create
a special alignment fragment at the end. Since that fragment doesn't update
the alignment of the section, it needs the real address to be computed.

Since now the layout will not compute a-b with a and b in different sections,
the only effect that the special alignment fragment has is update the
address size of the section. This can also be done by the MachO writer.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121076 91177308-0d34-0410-b5e6-96231b3b80d8
2010-12-07 00:27:36 +00:00
Rafael Espindola
340a7a1c8f Don't use PadSectionToAlignment on windows.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120978 91177308-0d34-0410-b5e6-96231b3b80d8
2010-12-06 03:03:44 +00:00
Rafael Espindola
e23930543c Move EmitValueToOffset to the ObjectStreamer.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120691 91177308-0d34-0410-b5e6-96231b3b80d8
2010-12-02 05:59:38 +00:00
Rafael Espindola
6f95023a7f Move EmitValue to MCObjectStreamer.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120269 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-28 23:08:47 +00:00
Rafael Espindola
ea4afa91eb Fixed verson of r120245.
Factor some duplicated code into MCObjectStreamer::EmitLabel.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120248 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-28 17:18:55 +00:00
Rafael Espindola
ba210243ef Revert previous patch while I debug the darwin bootstrap failure.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120246 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-28 16:22:59 +00:00
Rafael Espindola
f90a2de72c Factor some duplicated code into MCObjectStreamer::EmitLabel.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120245 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-28 15:54:36 +00:00
Rafael Espindola
3e03211625 Avoid code duplication in the many unsupported EmitGPRel32Value implementations.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120243 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-28 15:09:24 +00:00
Rafael Espindola
e04ed7e45f Define generic 1, 2 and 4 byte pc relative relocations. They are common
and at least the 4 byte one will be needed to implement the .cfi_* directives.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120240 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-28 14:17:56 +00:00
Rafael Espindola
af6b580875 Add .loc methods to the streamer.
Next: Add support for the !HasDotLocAndDotFile case to the MCAsmStreamer
and then switch codegen to use it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119384 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-16 21:20:32 +00:00
Jim Grosbach
ce79299f78 MC'ize the '.code 16' and '.thumb_func' ARM directives.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118301 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-05 22:08:08 +00:00
Rafael Espindola
f89671d994 Move EmitInstruction to MCObjectStreamer so that ELF and MachO can share it.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117925 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-01 16:27:31 +00:00
Michael J. Spencer
4cee2890a6 MC-COFF: Add support for default-null weak externals.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116666 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-16 08:25:57 +00:00
Michael J. Spencer
192d136750 MC-COFF: Implement InitSections. Fixes PR8335.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116151 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-09 15:44:27 +00:00
Michael J. Spencer
d47f4a9c98 MC-COFF: Assert on non-coff sections.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116148 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-09 11:00:37 +00:00
NAKAMURA Takumi
86c3647ddf Minor cosmetic change: fix DOSish \r\n.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115910 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-07 07:21:04 +00:00
Michael J. Spencer
b5814a3c15 MC-COFF: Fix symbol aliases. Fixes PR8251.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115909 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-07 06:29:33 +00:00
Rafael Espindola
59ff3c9134 Avoid some Mach-O specific alignment being done on ELF.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114594 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-22 22:27:05 +00:00
Rafael Espindola
d80781b98b Add a InitSections method to the streamer interface.
The ELF implementation now creates text, data and bss to match the gnu as
behavior.

The text streamer still has the old MachO specific behavior since
the testsuite checks that it will error when a directive is given
before a setting the current section for example.

A nice benefit is that -n is not required anymore when producing
ELF files.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114027 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-15 21:48:40 +00:00
Michael J. Spencer
bf252bef67 MC: Fix inconsistant naming in COFF object writer. Patch by Cameron Esfahani.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112076 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-25 19:27:27 +00:00
Michael J. Spencer
e2195d8b35 Add relax all support to the COFF object streamer.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109947 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-31 06:22:29 +00:00
Michael J. Spencer
8067adc271 MC: Add WinCOFFStreamer implementation and merge common code from MachO
into MCObjectStreamer.

Origonal Windows COFF implementation by Nathan Jedffords.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108678 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-19 06:13:10 +00:00
Chris Lattner
eb72dcaef7 introduce WinCOFFStreamer.cpp, patch by Michael Spencer!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108102 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-11 22:05:00 +00:00