glibc: Drop patch to support/workaround prelinked apps on armv5

The usecase explained in bug #1443 works fine now a days on qemuarmv5,
tested by using lltng-ust and explicitly linking in liburcu-bp.so as
well, since its no more a direct dependency of liblttng-ust.so.1

Given that usecase works, unbolt this fix now.

(From OE-Core rev: 088cf642e4a58fd50f93b22b4fdf5a2f25e1ed53)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Cc: Mark Hatle <mark.hatle@kernel.crashing.org>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 0 insertions, 58 deletions

diff --git a/meta/recipes-core/glibc/glibc/0012-Quote-from-bug-1443-which-explains-what-the-patch-do.patch b/meta/recipes-core/glibc/glibc/0012-Quote-from-bug-1443-which-explains-what-the-patch-do.patch
deleted file mode 100644
index 07d4411c61..0000000000
--- a/meta/recipes-core/glibc/glibc/0012-Quote-from-bug-1443-which-explains-what-the-patch-do.patch
+++ /dev/null
@@ -1,58 +0,0 @@
-From add514edf4299d1bf540d85d0aa0bd5fe0d46b78 Mon Sep 17 00:00:00 2001
-From: Khem Raj <raj.khem@gmail.com>
-Date: Wed, 18 Mar 2015 00:20:09 +0000
-Subject: [PATCH] Quote from bug 1443 which explains what the patch does :
-
-  We build some random program and link it with -lust.  When we run it,
-  it dies with a SIGSEGV before reaching main().
-
-  Libust.so depends on liburcu-bp.so from the usermode-rcu package.
-  Although libust.so is not prelinked, liburcu-bp.so IS prelinked; this
-  is critical.
-
-  Libust.so uses a TLS / __thread variable that is defined in liburcu-
-  bp.so.  There are special ARM-specific relocation types that allow two
-  shared libraries to share thread-specific data.  This is critical too.
-
-  One more critical issue: although liburcu-bp.so is prelinked, we can't
-  load it at its prelinked address, because we also link against
-  librt.so, and librt.so uses that address.
-
-  The dynamic linker is forced to relink liburcu-bp.so at a different
-  address.  In the course of relinking, it processes the special ARM
-  relocation record mentioned above.  The prelinker has already filled
-  in the information, which is a short offset into a table of thread-
-  specific data that is allocated per-thread for each library that uses
-  TLS.  Because the normal behavior of a relocation is to add the symbol
-  value to an addend stored at the address being relocated, we end up
-  adding the short offset to itself, doubling it.
-
-  Now we have an awkward situation.  The libust.so library doesn't know
-  about the addend, so its TLS data for this element is correct.  The
-  liburcu-bp.so library has a different offset for the element.  When we
-  go to initialize the element for the first time in liburcu-bp.so, we
-  write the address of the result at the doubled (broken) offset.
-  Later, when we refer to the address from libust.so, we check the value
-  at the correct offset, but it's NULL, so we eat hot SIGSEGV.
-
-Upstream-Status: Pending
-
-Signed-off-by: Andrei Dinu <andrei.adrianx.dinu@intel.com>
-Signed-off-by: Khem Raj <raj.khem@gmail.com>
----
- sysdeps/arm/dl-machine.h | 2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
-
-diff --git a/sysdeps/arm/dl-machine.h b/sysdeps/arm/dl-machine.h
-index ff5e09e207..d68bfe5cbe 100644
---- a/sysdeps/arm/dl-machine.h
-+++ b/sysdeps/arm/dl-machine.h
-@@ -510,7 +510,7 @@ elf_machine_rel (struct link_map *map, const Elf32_Rel *reloc,
- 
-        case R_ARM_TLS_DTPOFF32:
-          if (sym != NULL)
--           *reloc_addr += sym->st_value;
-+           *reloc_addr = sym->st_value;
-          break;
- 
-        case R_ARM_TLS_TPOFF32: