e808687a8c
generic-morestack.c (__generic_morestack): Align the returned stack pointer to a 32 byte boundary.
...
* generic-morestack.c (__generic_morestack): Align the returned
stack pointer to a 32 byte boundary.
* config/i386/morestack.S (__morestack_non_split) [32-bit]: Don't
increment the return address until we have decided that we don't
have a varargs function.
(__morestack) [32-bit]: Align stack correctly when calling C
functions.
(__morestack) [64-bit]: Likewise.
From-SVN: r193264
2012-11-06 23:04:28 +00:00
e9e053ebfd
generic-morestack.c (__splitstack_releasecontext): Correct call to __morestack_release_segments.
...
* generic-morestack.c (__splitstack_releasecontext): Correct call
to __morestack_release_segments.
From-SVN: r184634
2012-02-28 17:43:43 +00:00
d80c632e19
re PR target/52390 (only linux uses nptl)
...
PR target/52390
* generic-morestack.c (__generic_morestack_set_initial_sp): Test
for __linux__ when removing signals from __morestack_fullmask.
From-SVN: r184606
2012-02-27 18:50:45 +00:00
a13780a666
Check __GLIBC__ when using __SIGRTMIN
...
2011-12-14 H.J. Lu <hongjiu.lu@intel.com>
* generic-morestack.c (__generic_morestack_set_initial_sp): Check
__GLIBC__ instead of __linux__ when using __SIGRTMIN.
From-SVN: r182342
2011-12-14 10:49:16 -08:00
a01207c473
generic-morestack.c (__splitstack_find): Check for NULL old stack value.
...
* generic-morestack.c (__splitstack_find): Check for NULL old
stack value.
(__splitstack_resetcontext): New function.
(__splitstack_releasecontext): New function.
* libgcc-std.ver.in: Add new functions to GCC_4.7.0.
From-SVN: r181771
2011-11-28 05:44:31 +00:00
e14304eff5
generic-morestack.c: Include <string.h>.
...
libgcc/:
* generic-morestack.c: Include <string.h>.
(uintptr_type): Define.
(struct initial_sp): Add dont_block_signals field. Reduce size of
extra array by 1.
(allocate_segment): Set prev field to NULL. Don't set
__morestack_current_segment or __morestack_segments.
(__generic_morestack): Update current->prev and *pp after calling
allocate_segment.
(__morestack_block_signals): Don't do anything if
dont_block_signals is set.
(__morestack_unblock_signals): Likewise.
(__generic_findstack): Check for initial_sp == NULL. Add casts to
uintptr_type.
(__splitstack_block_signals): New function.
(enum __splitstack_content_offsets): Define.
(__splitstack_getcontext, __splitstack_setcontext): New functions.
(__splitstack_makecontext): New function.
(__splitstack_block_signals_context): New function.
(__splitstack_find_context): New function.
* config/i386/morestack.S (__morestack_get_guard): New function.
(__morestack_set_guard, __morestack_make_guard): New functions.
* libgcc-std.ver.in: Add new functions to GCC_4.7.0.
gcc/testsuite/:
* lib/target-supports.exp (check_effective_target_ucontext_h): New
procedure.
* gcc.dg/split-5.c: New test.
From-SVN: r181234
2011-11-09 20:06:31 +00:00
852b75ed97
Move libgcc_tm_file to toplevel libgcc
...
gcc:
* configure.ac (libgcc_tm_file_list, libgcc_tm_include_list):
Remove.
* configure: Regenerate.
* Makefile.in (libgcc_tm_file_list, libgcc_tm_include_list): Remove.
(TM_H): Remove libgcc_tm.h, $(libgcc_tm_file_list).
(libgcc_tm.h, cs-libgcc_tm.h): Remove.
(clean): Remove libgcc_tm.h
* mkconfig.sh: Don't include libgcc_tm.h in tm.h.
* config.gcc (libgcc_tm_file): Remove.
(arm*-*-linux*): Remove libgcc_tm_file for arm*-*-linux-*eabi.
(arm*-*-uclinux*): Remove libgcc_tm_file for arm*-*-uclinux*eabi.
(arm*-*-eabi*, arm*-*-symbianelf*): Remove libgcc_tm_file.
(avr-*-rtems*): Likewise.
(avr-*-*): Likewise.
(frv-*-elf): Likewise.
(frv-*-*linux*): Likewise.
(h8300-*-rtems*): Likewise.
(h8300-*-elf*): Likewise.
(i[34567]86-*-darwin*): Likewise.
(x86_64-*-darwin*): Likewise.
(rx-*-elf*): Likewise.
(tic6x-*-elf): Likewise.
(tic6x-*-uclinux): Likewise.
(i[34567]86-*-linux*, x86_64-*-linux*): Likewise.
libgcc:
* configure.ac (tm_file_): New variable.
Determine from tm_file.
(tm_file, tm_defines): Substitute.
* configure: Regenerate.
* mkheader.sh: New file.
* Makefile.in (clean): Remove libgcc_tm.h.
($(objects)): Depend on libgcc_tm.h.
(libgcc_tm_defines, libgcc_tm_file): New variables.
(libgcc_tm.h, libgcc_tm.stamp): New targets.
($(libgcc-objects), $(libgcc-s-objects), $(libgcc-eh-objects))
($(libgcov-objects), $(libunwind-objects), $(libunwind-s-objects))
($(extra-parts)): Depend on libgcc_tm.h.
* config.host (tm_defines, tm_file): New variable.
(arm*-*-linux*): Set tm_file for arm*-*-linux-*eabi.
(arm*-*-uclinux*): Set tm_file for arm*-*-uclinux*eabi.
(arm*-*-eabi*, arm*-*-symbianelf*): Set tm_file.
(avr-*-rtems*): Likewise.
(avr-*-*): Likewise.
(frv-*-elf): Likewise.
(frv-*-*linux*): Likewise.
(h8300-*-rtems*): Likewise.
(h8300-*-elf*): Likewise.
(i[34567]86-*-darwin*): Likewise.
(x86_64-*-darwin*): Likewise.
(rx-*-elf): Likewise.
(tic6x-*-uclinux): Likewise.
(tic6x-*-elf): Likewise.
(i[34567]86-*-linux*, x86_64-*-linux*): Likewise.
* config/alpha/gthr-posix.c: Include libgcc_tm.h.
* config/i386/cygming-crtbegin.c: Likewise.
* config/i386/cygming-crtend.c: Likewise.
* config/ia64/fde-vms.c: Likewise.
* config/ia64/unwind-ia64.c: Likewise.
* config/libbid/bid_gcc_intrinsics.h: Likewise.
* config/rs6000/darwin-fallback.c: Likewise.
* config/stormy16/lib2funcs.c: Likewise.
* config/xtensa/unwind-dw2-xtensa.c: Likewise.
* crtstuff.c: Likewise.
* dfp-bit.h: Likewise.
* emutls.c: Likewise.
* fixed-bit.c: Likewise.
* fp-bit.c: Likewise.
* generic-morestack-thread.c: Likewise.
* generic-morestack.c: Likewise.
* libgcc2.c: Likewise.
* libgcov.c: Likewise.
* unwind-dw2-fde-dip.c: Likewise.
* unwind-dw2-fde.c: Likewise.
* unwind-dw2.c: Likewise.
* unwind-sjlj.c: Likewise.
Co-Authored-By: Paolo Bonzini <bonzini@gnu.org>
From-SVN: r180775
2011-11-02 15:26:35 +00:00
91a639a157
re PR target/46093 (code compiled with -fsplit-stack crashes when passing large struct)
...
PR target/46093
* generic-morestack.c (__generic_morestack): Make sure the segment
is large enough for both the stack frame and the copied
parameters.
From-SVN: r179702
2011-10-07 22:51:11 +00:00
457186f6d5
generic-morestack.c (__splitstack_find): Adjust returned stack pointer to include all registers pushed by __morestack.
...
* generic-morestack.c (__splitstack_find): Adjust returned stack
pointer to include all registers pushed by __morestack.
From-SVN: r170757
2011-03-07 21:47:10 +00:00
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
Ian Lance Taylor