commit cc6e567ca38f3967ef9db746e685a33779e62da3
author George Rimar <grimar@accesssoftek.com> Fri Oct 14 10:34:36 2016 +0000
committer George Rimar <grimar@accesssoftek.com> Fri Oct 14 10:34:36 2016 +0000
tree 6fe095a4da4676344e811e58590d7cfc7d92035d
parent 68696836d163e3ba94dc4c488a8c0c1b721bc237

[ELF] - Implemented -z wxneeded.

-z wxneeded creates a PHDR PT_OPENBSD_WXNEEDED.

PT_OPENBSD_WXNEEDED
The array element specifies that a process executing this file may need to be able to map or protect memory regions as simultaneously executable and writable. If the system is unable or unwilling to permit that for this executable then it may fail immediately. This segment type is meaningful only for executable files and is ignored in other objects.

http://man.openbsd.org/OpenBSD-current/man5/elf.5

Differential revision: https://reviews.llvm.org/D25472

llvm-svn: 284226

lld/ELF/LinkerScript.cpp

diff --git a/lld/ELF/LinkerScript.cpp b/lld/ELF/LinkerScript.cpp
index 1a612b2..368b5e9 100644
--- a/lld/ELF/LinkerScript.cpp
+++ b/lld/ELF/LinkerScript.cpp
@@ -1720,6 +1720,7 @@
                      .Case("PT_GNU_EH_FRAME", PT_GNU_EH_FRAME)
                      .Case("PT_GNU_STACK", PT_GNU_STACK)
                      .Case("PT_GNU_RELRO", PT_GNU_RELRO)
+                     .Case("PT_OPENBSD_WXNEEDED", PT_OPENBSD_WXNEEDED)
                      .Default(-1);
 
   if (Ret == (unsigned)-1) {