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