src/patches/glibc/glibc-rh642584.patch

   1 2010-10-13  H.J. Lu  <hongjiu.lu@intel.com>
   2
   3         [BZ #12113]
   4         * sysdeps/x86_64/pthreaddef.h (TCB_ALIGNMENT): Changed to 32.
   5         * sysdeps/x86_64/tls.h (TLS_TCB_ALIGN): Defined with alignment
   6         of "struct pthread".
   7
   8 Index: glibc-2.12-2-gc4ccff1/nptl/sysdeps/x86_64/pthreaddef.h
   9 ===================================================================
  10 --- glibc-2.12-2-gc4ccff1.orig/nptl/sysdeps/x86_64/pthreaddef.h
  11 +++ glibc-2.12-2-gc4ccff1/nptl/sysdeps/x86_64/pthreaddef.h
  12 @@ -27,8 +27,9 @@
  13  /* Minimal stack size after allocating thread descriptor and guard size.  */
  14  #define MINIMAL_REST_STACK     2048
  15
  16 -/* Alignment requirement for TCB.  */
  17 -#define TCB_ALIGNMENT          16
  18 +/* Alignment requirement for TCB.  Need to store post-AVX vector registers
  19 +   in the TCB and we want the storage to be aligned at 32-byte.  */
  20 +#define TCB_ALIGNMENT          32
  21
  22
  23  /* Location of current stack frame.  The frame pointer is not usable.  */
  24 Index: glibc-2.12-2-gc4ccff1/nptl/sysdeps/x86_64/tls.h
  25 ===================================================================
  26 --- glibc-2.12-2-gc4ccff1.orig/nptl/sysdeps/x86_64/tls.h
  27 +++ glibc-2.12-2-gc4ccff1/nptl/sysdeps/x86_64/tls.h
  28 @@ -117,12 +117,7 @@ typedef struct
  29  # define TLS_TCB_SIZE sizeof (struct pthread)
  30
  31  /* Alignment requirements for the TCB.  */
  32 -//# define TLS_TCB_ALIGN __alignof__ (struct pthread)
  33 -// Normally the above would be correct  But we have to store post-AVX
  34 -// vector registers in the TCB and we want the storage to be aligned.
  35 -// unfortunately there isn't yet a type for these values and hence no
  36 -// 32-byte alignment requirement.  Make this explicit, for now.
  37 -# define TLS_TCB_ALIGN 32
  38 +# define TLS_TCB_ALIGN __alignof__ (struct pthread)
  39
  40  /* The TCB can have any size and the memory following the address the
  41     thread pointer points to is unspecified.  Allocate the TCB there.  */