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7458026b01
gcc/libgcc/config
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Ian Lance Taylor 7458026b01 common.opt (fsplit-stack): New option. 
gcc/:
	* common.opt (fsplit-stack): New option.
	* opts.c (decode_options): Set flag_split_stack to final value.
	* target.def (supports_split_stack): New hook.
	* gcc.c (STACK_SPLIT_SPEC): Define.
	(LINK_COMMAND_SPEC): Use STACK_SPLIT_SPEC.
	* doc/invoke.texi (Option Summary): Mention -fsplit-stack.
	(Code Gen Options): Document -fsplit-stack.
	* doc/extend.texi (Function Attributes): Mention no_split_stack.
	(Function Attributes): Document no_split_stack.
	* doc/tm.texi.in (Stack Smashing Protection): Add @hook
	TARGET_SUPPORTS_SPLIT_STACK.
	* doc/tm.texi: Rebuild.
	* function.c (thread_prologue_and_epilogue_insns): If
	flag_split_stack, add split stack prologue.
	* explow.c (allocate_dynamic_stack_space): Support -fsplit-stack.
	* varasm.c (saw_no_split_stack): New static variable.
	(assemble_start_function): Set saw_no_split_stack if the function
	has the no_split_stack attribute.
	(file_end_indicate_split_stack): New function.
	* output.h (file_end_indicate_split_stack): Declare.
	* libgcc-std.ver (GCC_4.6.0): Add -fsplit-stack support variables
	and function.
	* doc/libgcc.texi (Miscellaneous routines): Document -fsplit-stack
	routines.
	* config/i386/i386.c (ix86_option_override_internal): Don't set
	expand_builtin_va_start to NULL if -fsplit-stack.
	(ix86_function_regparm): Reduce local regparm by 1 for 32-bit
	-fsplit-stack.
	(ix86_va_start): If -fsplit-stack, get overflow pointer	from
	scratch register set by prologue.
	(ix86_code_end): If -fsplit-stack, call
	file_end_indicate_split_stack.
	(ix86_supports_split_stack): New static function.
	(SPLIT_STACK_AVAILABLE): Define.
	(split_stack_prologue_scratch_regno): New static function.
	(split_stack_fn): New static variable.
	(ix86_expand_split_stack_prologue): New function.
	(ix86_live_on_entry): New static function.
	(ix86_legitimate_address_p): Handle UNSPEC_STACK_CHECK.
	(output_pic_addr_const): Likewise.
	(i386_asm_output_addr_const_extra): Likewise.
	(ix86_expand_call): Change return type to rtx.  Return the new
	call instruction.
	(TARGET_SUPPORTS_SPLIT_STACK): Define.
	(TARGET_EXTRA_LIVE_ON_ENTRY): Define.
	* config/i386/i386.md (UNSPEC_STACK_CHECK): Define.
	(split_stack_prologue, split_stack_return): New insns.
	(split_stack_space_check): New insn.
	* config/i386/i386.h (struct machine_function): Add
	split_stack_varargs_pointer field.
	* config/i386/linux.h (TARGET_CAN_SPLIT_STACK): Define.
	(TARGET_THREAD_SPLIT_STACK_OFFSET): Define.
	* config/i386/linux64.h (TARGET_CAN_SPLIT_STACK): Define.
	(TARGET_THREAD_SPLIT_STACK_OFFSET): Define.
	* config/i386/i386-protos.h (ix86_expand_split_stack_prologue):
	Declare.
	(ix86_expand_call): Update declaration.
gcc/c-family/:
	* c-common.c (c_common_attribute_table): Add no_split_stack.
	(handle_no_split_stack_attribute): New static function.
gcc/testsuite/:
	* lib/target-supports.exp (check_effective_target_split_stack):
	New procedure.
	* gcc.dg/split-1.c: New test.
	* gcc.dg/split-2.c: New test.
	* gcc.dg/split-3.c: New test.
	* gcc.dg/split-4.c: New test.
libgcc/:
	* generic-morestack.h: New file.
	* generic-morestack.c: New file.
	* generic-morestack-thread.c: New file.
	* config/i386/morestack.S: New file.
	* config/t-stack: New file.
	* config/i386/t-stack-i386: New file.
	* config.host (i[34567]86-*-linux* and friends): Add t-stack and
	i386/t-stack-i386 to tmake_file.

From-SVN: r164661
2010-09-27 19:48:20 +00:00
..
alpha
avr
i386 common.opt (fsplit-stack): New option. 2010-09-27 19:48:20 +00:00
ia64 Licensing changes to GPLv3 resp. GPLv3 with GCC Runtime Exception. 2009-04-09 17:00:19 +02:00
libbid Licensing changes to GPLv3 resp. GPLv3 with GCC Runtime Exception. 2009-04-09 17:00:19 +02:00
lm32 t-lm32: New file. 2010-03-30 10:26:24 +00:00
mips config.gcc (mips64*-*-linux*, [...]): Add crtfastmath.o to extra_parts. 2010-06-12 07:44:51 +00:00
mmix Migrate from broken pre-libgcc legacy support to libgcc-centric rules. 2010-02-22 00:37:30 +00:00
moxie Fix libgcc build for moxie. 2010-01-04 08:29:53 +00:00
rs6000 config.host (powerpc*-eabispe*): Set tmake_file. 2010-07-23 16:53:48 +00:00
rx MAINTAINERS: Add myself as a maintainer for the RX port. 2009-10-26 16:30:15 +00:00
s390 config.gcc: Don't include the makefile fragments intended for libgcc. 2009-10-07 08:26:47 +00:00
sh t-sh (TARGET_LIBGCC2_CFLAGS): Define. 2009-08-22 21:43:07 +00:00
sparc
t-slibgcc-darwin re PR java/41991 (gcj segfaults on i686-apple-darwin9 and x86_64-apple-darwin9) 2010-02-02 09:18:48 +01:00
t-softfp
t-stack common.opt (fsplit-stack): New option. 2010-09-27 19:48:20 +00:00
t-tls