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Author SHA1 Message Date
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