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cross-ia64-gcc47-icecream-backend
gcc41-ia64-stack-protector.patch
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File gcc41-ia64-stack-protector.patch of Package cross-ia64-gcc47-icecream-backend
2005-07-08 Jakub Jelinek <jakub@redhat.com> * config/ia64/ia64.h (FRAME_GROWS_DOWNWARD): Define to 1 if -fstack-protect. * config/ia64/ia64.c (ia64_compute_frame_size): Make sure size is a multiple of 16 if FRAME_GROWS_DOWNWARD. (ia64_initial_elimination_offset): Support FRAME_GROWS_DOWNWARD layout. * config/ia64/linux.h (TARGET_LIBC_PROVIDES_SSP): Define. * config/ia64/ia64.md (stack_protect_set, stack_protect_test): New expanders. Index: gcc/config/ia64/linux.h =================================================================== --- gcc/config/ia64/linux.h.orig 2011-11-03 16:27:28.000000000 +0100 +++ gcc/config/ia64/linux.h 2011-11-04 11:39:46.000000000 +0100 @@ -77,6 +77,11 @@ do { \ #undef LINK_EH_SPEC #define LINK_EH_SPEC "" +#ifdef TARGET_LIBC_PROVIDES_SSP +/* IA-64 glibc provides __stack_chk_guard in [r13-8]. */ +#define TARGET_THREAD_SSP_OFFSET -8 +#endif + /* Put all *tf routines in libgcc. */ #undef LIBGCC2_HAS_TF_MODE #define LIBGCC2_HAS_TF_MODE 1 Index: gcc/config/ia64/ia64.c =================================================================== --- gcc/config/ia64/ia64.c.orig 2011-11-03 16:27:28.000000000 +0100 +++ gcc/config/ia64/ia64.c 2011-11-04 11:39:47.000000000 +0100 @@ -2797,6 +2797,9 @@ ia64_compute_frame_size (HOST_WIDE_INT s else pretend_args_size = crtl->args.pretend_args_size; + if (FRAME_GROWS_DOWNWARD) + size = IA64_STACK_ALIGN (size); + total_size = (spill_size + extra_spill_size + size + pretend_args_size + crtl->outgoing_args_size); total_size = IA64_STACK_ALIGN (total_size); @@ -2829,32 +2832,19 @@ ia64_can_eliminate (const int from ATTRI HOST_WIDE_INT ia64_initial_elimination_offset (int from, int to) { - HOST_WIDE_INT offset; + HOST_WIDE_INT offset, size = get_frame_size (); - ia64_compute_frame_size (get_frame_size ()); + ia64_compute_frame_size (size); switch (from) { case FRAME_POINTER_REGNUM: - switch (to) - { - case HARD_FRAME_POINTER_REGNUM: - if (current_function_is_leaf) - offset = -current_frame_info.total_size; - else - offset = -(current_frame_info.total_size - - crtl->outgoing_args_size - 16); - break; - - case STACK_POINTER_REGNUM: - if (current_function_is_leaf) - offset = 0; - else - offset = 16 + crtl->outgoing_args_size; - break; - - default: - gcc_unreachable (); - } + offset = FRAME_GROWS_DOWNWARD ? IA64_STACK_ALIGN (size) : 0; + if (!current_function_is_leaf) + offset += 16 + crtl->outgoing_args_size; + if (to == HARD_FRAME_POINTER_REGNUM) + offset -= current_frame_info.total_size; + else + gcc_assert (to == STACK_POINTER_REGNUM); break; case ARG_POINTER_REGNUM: Index: gcc/config/ia64/ia64.md =================================================================== --- gcc/config/ia64/ia64.md.orig 2011-11-03 16:27:28.000000000 +0100 +++ gcc/config/ia64/ia64.md 2011-11-04 11:39:47.000000000 +0100 @@ -5180,6 +5180,43 @@ "mov %0 = ip" [(set_attr "itanium_class" "frbr")]) +;; +;; Stack guard expanders + +(define_expand "stack_protect_set" + [(set (match_operand 0 "memory_operand" "") + (match_operand 1 "memory_operand" ""))] + "" +{ +#ifdef TARGET_THREAD_SSP_OFFSET + rtx thread_pointer_rtx = gen_rtx_REG (Pmode, 13); + rtx canary = gen_rtx_MEM (Pmode, gen_rtx_PLUS (Pmode, thread_pointer_rtx, + GEN_INT (TARGET_THREAD_SSP_OFFSET))); + MEM_VOLATILE_P (canary) = MEM_VOLATILE_P (operands[1]); + operands[1] = canary; +#endif + emit_move_insn (operands[0], operands[1]); + DONE; +}) + +(define_expand "stack_protect_test" + [(match_operand 0 "memory_operand" "") + (match_operand 1 "memory_operand" "") + (match_operand 2 "" "")] + "" +{ +#ifdef TARGET_THREAD_SSP_OFFSET + rtx thread_pointer_rtx = gen_rtx_REG (Pmode, 13); + rtx canary = gen_rtx_MEM (Pmode, gen_rtx_PLUS (Pmode, thread_pointer_rtx, + GEN_INT (TARGET_THREAD_SSP_OFFSET))); + MEM_VOLATILE_P (canary) = MEM_VOLATILE_P (operands[1]); + operands[1] = canary; +#endif + emit_cmp_and_jump_insns (operands[0], operands[1], EQ, NULL_RTX, + ptr_mode, 1, operands[2]); + DONE; +}) + ;; Vector operations (include "vect.md") ;; Atomic operations Index: gcc/config/ia64/ia64.h =================================================================== --- gcc/config/ia64/ia64.h.orig 2011-04-28 15:02:22.000000000 +0200 +++ gcc/config/ia64/ia64.h 2011-11-04 11:39:47.000000000 +0100 @@ -872,7 +872,7 @@ enum reg_class /* Define this macro to nonzero if the addresses of local variable slots are at negative offsets from the frame pointer. */ -#define FRAME_GROWS_DOWNWARD 0 +#define FRAME_GROWS_DOWNWARD (flag_stack_protect != 0) /* Offset from the frame pointer to the first local variable slot to be allocated. */
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