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Re: PowerPC: Reserve TCB space for EBB framework

On 14-06-2013 18:12, Ryan S. Arnold wrote:
> I'm fine with the patch. Ryan 

I cleaned up the patch and below is the final version I committed. My first
approach wasn't entirely correct: the stack_pointer offset can not change,
since gcc -fstack-protector relies on it, so I adjusted the EBB fields 'up'
in the structure. I also decided to not change how stack_pointer offset is
set, since its values can not change without breaking binaries built with


 ChangeLog                  |    5 +++++
 nptl/sysdeps/powerpc/tls.h |    5 +++++
 2 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index f5292c5..8ba955a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2013-06-17  Adhemerval Zanella  <>
+       * nptl/sysdeps/powerpc/tls.h (tcbhead_t): Add Event-Based Branch
+       fields.
 2013-06-17  Roland McGrath  <>
        * scripts/sysd-rules.awk: Sort sysd_rules_patterns by descending
diff --git a/nptl/sysdeps/powerpc/tls.h b/nptl/sysdeps/powerpc/tls.h
index 46dac9e..8e0ada6 100644
--- a/nptl/sysdeps/powerpc/tls.h
+++ b/nptl/sysdeps/powerpc/tls.h
@@ -61,6 +61,11 @@ typedef union dtv
    are private.  */  
 typedef struct
+  /* Reservation for the Event-Based Branching ABI.  */
+  uintptr_t ebb_handler;
+  uintptr_t ebb_ctx_pointer;
+  uintptr_t ebb_reserved1;
+  uintptr_t ebb_reserved2;
   uintptr_t pointer_guard;
   uintptr_t stack_guard;
   dtv_t *dtv;

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