aboutsummaryrefslogtreecommitdiff
path: root/nptl
diff options
context:
space:
mode:
authorUlrich Weigand <Ulrich.Weigand@de.ibm.com>2013-12-04 06:45:56 -0600
committerAdhemerval Zanella <azanella@linux.vnet.ibm.com>2013-12-04 07:41:38 -0600
commitb525166bb93b060e1146f0263b76a9c1e7455b06 (patch)
tree11b27e8c03bf033a91edac3aa4fa42d0ffc5f24a /nptl
parent7ec07d9a7b501f1b7d740fda02ba5f39d6d684e5 (diff)
downloadglibc-b525166bb93b060e1146f0263b76a9c1e7455b06.tar
glibc-b525166bb93b060e1146f0263b76a9c1e7455b06.tar.gz
glibc-b525166bb93b060e1146f0263b76a9c1e7455b06.tar.bz2
glibc-b525166bb93b060e1146f0263b76a9c1e7455b06.zip
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.
Diffstat (limited to 'nptl')
-rw-r--r--nptl/sysdeps/powerpc/tls.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/nptl/sysdeps/powerpc/tls.h b/nptl/sysdeps/powerpc/tls.h
index 8e0ada6bfa..c21c0271ef 100644
--- a/nptl/sysdeps/powerpc/tls.h
+++ b/nptl/sysdeps/powerpc/tls.h
@@ -61,6 +61,8 @@ typedef union dtv
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;