Commit Graph

11 Commits

Author SHA1 Message Date
Rafael Espindola f4c1cd4006 Fix handling of R_X86_64_GOT32.
It computes the offset to the end of .got.

llvm-svn: 266610
2016-04-18 12:58:59 +00:00
Rafael Espindola b508f520e7 Create implicit plt entries for R_X86_64_32S.
llvm-svn: 261749
2016-02-24 16:37:47 +00:00
Ed Maste f5d3cf6270 Add debugger rendezvous DT_DEBUG .dynamic entry
The runtime linker may store a pointer to a data structure used by
debuggers.

Differential Revision:	http://reviews.llvm.org/D15775

llvm-svn: 256942
2016-01-06 15:52:27 +00:00
Rafael Espindola 97cbe3e39c Place RW sections that go after relro to another memory page.
Before this patch sections that go after relro sequence were placed at
the same memory page with relro ones. It caused segmentation fault on
freebsd.

Fixes PR25790.

Patch by George Rimar with some tweaks by myself.

llvm-svn: 256334
2015-12-23 15:20:38 +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