2009-10-06  Ian Lance Taylor  <iant@google.com>

	* config/i386/morestack.S: Add empty .note.GNU-split-stack and
	.note.GNU-no-split-stack sections.
	(__morestack_non_split): New entry point.
	(__morestack): Get stack size from __generic_releasestack and use
	it to calculate the new stack guard.
	* generic-morestack.c (__generic_morestack): Fix stack bottom
	calculation for downward stack.
	(__generic_releasestack): Add pavailable parameter.

2009-09-30  Ian Lance Taylor  <iant@google.com>
	    Richard Henderson  <rth@redhat.com>

	* config/i386/morestack.S (__morestack): In 32-bit case, use a
	stack slot to hold the incremented return address rather than
	trashing %ecx.

2009-09-29  Ian Lance Taylor  <iant@google.com>
	    Richard Henderson  <rth@redhat.com>

	* generic-morestack.c: #include <pthread.h>.
	(__generic_morestack): Make hidden.
	(__generic_releasestack): Likewise.
	(allocate_segment): Only use sync_val_compare_and_swap if it is
	available.
	(struct pthread_create_args): Define.
	(stack_split_initialize_thread): New static function.
	(__wrap_pthread_create): New function.
	* config/i386/morestack.S (__morestack): Add CFI pseudo-ops.  Use
	a frame pointer.  Change call/return sequence.  Remove __PIC__
	code.  Change TCB offsets.
	(__stack_split_initialize): Rename from init.  Make global.
	Change TCB offsets.

2009-09-26  Ian Lance Taylor  <iant@google.com>

	* generic-morestack.c: Don't build anything if inhibit_libc is
	defined.

2009-09-25  Ian Lance Taylor  <iant@google.com>

	* config/i386/morestack.S: New file.
	* config/i386/t-stack-i386: New file.
	* generic-morestack.c: New file.
	* config/t-stack: New file.
	* config.host (cpu_type): Add t-stack and i386/t-stack-i386 for
	x86-*-*gnu targets.


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