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9 Commits

Author SHA1 Message Date
Rui Ueyama f86cb90a2d Do not propagate section name and attributes to .eh_frame. 
.eh_frame is always ".eh_frame" and its attribute is fixed.
No need to copy from inputs to outputs. GNU gold also sets
SHT_PROGBITS.

llvm-svn: 270443
 2016-05-23 15:12:41 +00:00
George Rimar e72bebaf2d [ELF] - Fixed padding for CIE/FDE entries of .eh_frame section 
Spec says both CIE/FDE has "Padding
Extra bytes to align the CIE structure to an addressing unit size boundary."
https://refspecs.linuxfoundation.org/LSB_3.0.0/LSB-PDA/LSB-PDA/ehframechpt.html

Patch aligns CIE/FDE entries to the size of platform pointer.

Differential revision: http://reviews.llvm.org/D15637

llvm-svn: 256141
 2015-12-21 09:38:59 +00:00
Rui Ueyama 7b19c34550 Revert "ELF: Make .note.GNU-stack more compatible with traditional linkers." 
This reverts commit r253797 because it was based on a misunderstanding
that lld wouldn't work on NetBSD without this change.

llvm-svn: 254003
 2015-11-24 18:48:16 +00:00
George Rimar e3336c0be6 Reapply fixed r253967. 
llvm-svn: 253971
 2015-11-24 10:15:50 +00:00
George Rimar 11721ce810 Revert r253967 which broke buildbot. 
llvm-svn: 253970
 2015-11-24 10:04:22 +00:00
George Rimar 63a6ca9150 [ELF] Implements -z relro: create an ELF "PT_GNU_RELRO" segment header in the object. 
Partial (-z relro) and full (-z relro, -z now) relro cases are implemented.

Partial relro:
The ELF sections are reordered so that the ELF internal data sections (.got, .dtors, etc.) precede the program's data sections (.data and .bss).
.got is readonly, .got.plt is still writeable.

Full relro:
Supports all the features of partial RELRO, .got.plt is also readonly.

Differential revision: http://reviews.llvm.org/D14218

llvm-svn: 253967
 2015-11-24 09:44:28 +00:00
Rui Ueyama e79b09a616 ELF: Make .note.GNU-stack more compatible with traditional linkers. 
With this patch, lld creates PT_GNU_STACK segments only when all input
files have .note.GNU-stack sections. This is in line with other linkers
with a minor difference (we don't care about .note.GNU-stack rwx bits as
you can always remove .note.GNU-stack sections instead of setting x bit.)

At least, NetBSD loader does not understand PT_GNU_STACK segments and
reject any executables that have the section. This patch makes lld
compatible with such operating systems.

llvm-svn: 253797
 2015-11-21 22:19:32 +00:00
Rafael Espindola 9c8904fb38 Rename ld.lld2 to ld.lld since it is the default. 
llvm-svn: 253437
 2015-11-18 06:11:01 +00:00
Rafael Espindola 4b1285c55a Rename test/elf2 to test/ELF. 
llvm-svn: 253313
 2015-11-17 05:36:42 +00:00