blob: dad59a6961e42c8db510cd9977f35f454a8a6bcf (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
|
# commit b525166bb93b060e1146f0263b76a9c1e7455b06
# Author: Ulrich Weigand <Ulrich.Weigand@de.ibm.com>
# Date: Wed Dec 4 06:45:56 2013 -0600
#
# PowerPC64: Add __private_ss field to TCB header
#
# The TCB header on Intel contains a field __private_ss that is used
# to efficiently implement the -fsplit-stack GCC feature.
#
# In order to prepare for a possible future implementation of that
# feature on powerpc64, we'd like to reserve a similar field in
# the TCB header as well. (It would be good if this went in with
# or before the ELFv2 patches to ensure that this field will be
# available always in the ELFv2 environment.)
#
# The field needs to be added at the front of tcbhead_t structure
# to avoid changing the ABI; see the recent discussion when adding
# the EBB fields.
#
diff -urN glibc-2.17-c758a686/nptl/sysdeps/powerpc/tls.h glibc-2.17-c758a686/nptl/sysdeps/powerpc/tls.h
--- glibc-2.17-c758a686/nptl/sysdeps/powerpc/tls.h 2014-05-29 13:19:25.000000000 -0500
+++ glibc-2.17-c758a686/nptl/sysdeps/powerpc/tls.h 2014-05-29 13:19:25.000000000 -0500
@@ -61,6 +61,8 @@
are private. */
typedef struct
{
+ /* GCC split stack support. */
+ void *__private_ss;
/* Reservation for the Event-Based Branching ABI. */
uintptr_t ebb_handler;
uintptr_t ebb_ctx_pointer;
|
