Commit Graph

7 Commits

Author SHA1 Message Date
Rafael Espindola
dc3ad4835d Don't create empty sections just to look like gas.
We are long past the time when this much bug for bug compatibility was
useful.

llvm-svn: 251970
2015-11-03 20:02:22 +00:00
Rafael Espindola
a031c08f04 Write the section header string table directly to the output stream.
Instead of accumulating the content in a fragment first, just write it
to the output stream.

Also put it first in the section table, so that we never have to worry
about its index being >= SHN_LORESERVE.

llvm-svn: 236145
2015-04-29 20:25:24 +00:00
Rafael Espindola
6fa49967ca Use a comma after the unique keyword.
H.J. Lu noted that all .section options are separated by a comma.

This patch changes the syntax of unique to require one.

llvm-svn: 234174
2015-04-06 16:34:41 +00:00
Rafael Espindola
0601e2fab8 Implement unique sections with an unique ID.
This allows the compiler/assembly programmer to switch back to a
section. This in turn fixes the bootstrap failure on powerpc (tested
on gcc110) without changing the ppc codegen at all.

I will try to cleanup the various getELFSection overloads in a  followup patch.
Just using a default argument now would lead to ambiguities.

llvm-svn: 234099
2015-04-04 18:02:01 +00:00
Rafael Espindola
6d441224de Add testcases I missed in r229541.
llvm-svn: 229542
2015-02-17 20:50:39 +00:00
Chandler Carruth
6c78cd7569 Revert a series of commits starting at r228886 which is triggering some
regressions for LLDB on Linux. Rafael indicated on lldb-dev that we
should just go ahead and revert these but that he wasn't at a computer.
The patches backed out are as follows:

r228980: Add support for having multiple sections with the name and ...
r228889: Invert the section relocation map.
r228888: Use the existing SymbolTableIndex intsead of doing a lookup.
r228886: Create the Section -> Rel Section map when it is first needed.

These patches look pretty nice to me, so hoping its not too hard to get
them re-instated. =D

llvm-svn: 229080
2015-02-13 07:52:39 +00:00
Rafael Espindola
4467ec2e41 Add support for having multiple sections with the same name and comdat.
Using this in combination with -ffunction-sections allows LLVM to output a .o
file with mulitple sections named .text. This saves space by avoiding long
unique names of the form .text.<C++ mangled name>.

llvm-svn: 228980
2015-02-12 23:29:51 +00:00