b680b90497
The SECTION_LINK_ORDER changes broke powerpc64-linux ELFv1. Seems
that the assembler/linker relies on the symbol mentioned for the
"awo" section to be in the same section as the symbols mentioned in
the relocations in that section (i.e. labels for the patchable area
in this case). That is the case for most targets, including powerpc-linux
32-bit or powerpc64 ELFv2 (that one has -fpatchable-function-entry*
support broken for other reasons and it doesn't seem to be a regression).
But it doesn't work on powerpc64-linux ELFv1.
We emit:
.section ".opd","aw"
.align 3
_Z3foov:
.quad .L._Z3foov,.TOC.@tocbase,0
.previous
.type _Z3foov, @function
.L._Z3foov:
.section __patchable_function_entries,"awo",@progbits,_Z3foov
.align 3
.8byte .LPFE1
.section .text._Z3foov,"axG",@progbits,_Z3foov,comdat
.LPFE1:
nop
.LFB0:
.cfi_startproc
and because _Z3foov is in the .opd section rather than the function text
section, it doesn't work.
I'm afraid I don't know what exactly should be done, whether e.g.
it could use
.section __patchable_function_entries,"awo",@progbits,.L._Z3foov
instead, or whether the linker should be changed to handle it as is, or
something else.
But because we have a P1 regression that didn't see useful progress over the
4 months since it has been filed and we don't really have much time, below
is an attempt to do a targetted reversion of H.J's patch, basically act as
if HAVE_GAS_SECTION_LINK_ORDER is never true for powerpc64-linux ELFv1,
but for 32-bit or 64-bit ELFv2 keep working as is.
This would give us time to resolve it for GCC 12 properly.
2021-04-03 Jakub Jelinek <jakub@redhat.com>
PR testsuite/98125
* targhooks.h (default_print_patchable_function_entry_1): Declare.
* targhooks.c (default_print_patchable_function_entry_1): New function,
copied from default_print_patchable_function_entry with an added flags
argument.
(default_print_patchable_function_entry): Rewritten into a small
wrapper around default_print_patchable_function_entry_1.
* config/rs6000/rs6000.c (TARGET_ASM_PRINT_PATCHABLE_FUNCTION_ENTRY):
Redefine.
(rs6000_print_patchable_function_entry): New function.
* g++.dg/pr93195a.C: Skip on powerpc*-*-* 64-bit.
304 lines
14 KiB
C++
304 lines
14 KiB
C++
/* Default target hook functions.
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Copyright (C) 2003-2021 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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#ifndef GCC_TARGHOOKS_H
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#define GCC_TARGHOOKS_H
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extern bool default_legitimate_address_p (machine_mode, rtx, bool);
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extern void default_external_libcall (rtx);
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extern rtx default_legitimize_address (rtx, rtx, machine_mode);
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extern bool default_legitimize_address_displacement (rtx *, rtx *,
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poly_int64, machine_mode);
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extern bool default_const_not_ok_for_debug_p (rtx);
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extern int default_unspec_may_trap_p (const_rtx, unsigned);
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extern machine_mode default_promote_function_mode (const_tree, machine_mode,
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int *, const_tree, int);
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extern machine_mode default_promote_function_mode_always_promote
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(const_tree, machine_mode, int *, const_tree, int);
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extern machine_mode default_cc_modes_compatible (machine_mode,
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machine_mode);
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extern bool default_return_in_memory (const_tree, const_tree);
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extern rtx default_expand_builtin_saveregs (void);
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extern void default_setup_incoming_varargs (cumulative_args_t,
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const function_arg_info &,
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int *, int);
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extern rtx default_builtin_setjmp_frame_value (void);
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extern bool default_pretend_outgoing_varargs_named (cumulative_args_t);
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extern scalar_int_mode default_eh_return_filter_mode (void);
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extern scalar_int_mode default_libgcc_cmp_return_mode (void);
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extern scalar_int_mode default_libgcc_shift_count_mode (void);
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extern scalar_int_mode default_unwind_word_mode (void);
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extern unsigned HOST_WIDE_INT default_shift_truncation_mask
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(machine_mode);
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extern unsigned int default_min_divisions_for_recip_mul (machine_mode);
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extern int default_mode_rep_extended (scalar_int_mode, scalar_int_mode);
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extern tree default_stack_protect_guard (void);
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extern tree default_external_stack_protect_fail (void);
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extern tree default_hidden_stack_protect_fail (void);
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extern machine_mode default_mode_for_suffix (char);
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extern tree default_cxx_guard_type (void);
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extern tree default_cxx_get_cookie_size (tree);
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extern bool hook_pass_by_reference_must_pass_in_stack
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(cumulative_args_t, const function_arg_info &);
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extern bool hook_callee_copies_named
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(cumulative_args_t ca, const function_arg_info &);
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extern void default_print_operand (FILE *, rtx, int);
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extern void default_print_operand_address (FILE *, machine_mode, rtx);
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extern bool default_print_operand_punct_valid_p (unsigned char);
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extern tree default_mangle_assembler_name (const char *);
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extern machine_mode default_translate_mode_attribute (machine_mode);
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extern bool default_scalar_mode_supported_p (scalar_mode);
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extern bool default_libgcc_floating_mode_supported_p (scalar_float_mode);
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extern opt_scalar_float_mode default_floatn_mode (int, bool);
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extern bool default_floatn_builtin_p (int);
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extern bool targhook_words_big_endian (void);
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extern bool targhook_float_words_big_endian (void);
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extern bool default_float_exceptions_rounding_supported_p (void);
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extern bool default_decimal_float_supported_p (void);
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extern bool default_fixed_point_supported_p (void);
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extern bool default_has_ifunc_p (void);
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extern bool default_predict_doloop_p (class loop *);
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extern const char * default_invalid_within_doloop (const rtx_insn *);
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extern tree default_builtin_vectorized_function (unsigned int, tree, tree);
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extern tree default_builtin_md_vectorized_function (tree, tree, tree);
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extern int default_builtin_vectorization_cost (enum vect_cost_for_stmt, tree, int);
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extern tree default_builtin_reciprocal (tree);
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extern HOST_WIDE_INT default_static_rtx_alignment (machine_mode);
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extern HOST_WIDE_INT default_constant_alignment (const_tree, HOST_WIDE_INT);
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extern HOST_WIDE_INT constant_alignment_word_strings (const_tree,
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HOST_WIDE_INT);
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extern HOST_WIDE_INT default_vector_alignment (const_tree);
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extern poly_uint64 default_preferred_vector_alignment (const_tree);
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extern bool default_builtin_vector_alignment_reachable (const_tree, bool);
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extern bool
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default_builtin_support_vector_misalignment (machine_mode mode,
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const_tree,
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int, bool);
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extern machine_mode default_preferred_simd_mode (scalar_mode mode);
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extern machine_mode default_split_reduction (machine_mode);
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extern unsigned int default_autovectorize_vector_modes (vector_modes *, bool);
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extern opt_machine_mode default_vectorize_related_mode (machine_mode,
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scalar_mode,
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poly_uint64);
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extern opt_machine_mode default_get_mask_mode (machine_mode);
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extern bool default_empty_mask_is_expensive (unsigned);
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extern void *default_init_cost (class loop *);
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extern unsigned default_add_stmt_cost (class vec_info *, void *, int,
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enum vect_cost_for_stmt,
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class _stmt_vec_info *, tree, int,
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enum vect_cost_model_location);
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extern void default_finish_cost (void *, unsigned *, unsigned *, unsigned *);
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extern void default_destroy_cost_data (void *);
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/* OpenACC hooks. */
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extern bool default_goacc_validate_dims (tree, int [], int, unsigned);
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extern int default_goacc_dim_limit (int);
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extern bool default_goacc_fork_join (gcall *, const int [], bool);
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extern void default_goacc_reduction (gcall *);
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/* These are here, and not in hooks.[ch], because not all users of
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hooks.h include tm.h, and thus we don't have CUMULATIVE_ARGS. */
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extern bool hook_bool_CUMULATIVE_ARGS_false (cumulative_args_t);
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extern bool hook_bool_CUMULATIVE_ARGS_true (cumulative_args_t);
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extern bool hook_bool_CUMULATIVE_ARGS_arg_info_false
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(cumulative_args_t, const function_arg_info &);
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extern bool hook_bool_CUMULATIVE_ARGS_arg_info_true
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(cumulative_args_t, const function_arg_info &);
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extern int hook_int_CUMULATIVE_ARGS_arg_info_0
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(cumulative_args_t, const function_arg_info &);
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extern void hook_void_CUMULATIVE_ARGS_tree
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(cumulative_args_t, tree);
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extern const char *hook_invalid_arg_for_unprototyped_fn
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(const_tree, const_tree, const_tree);
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extern void default_function_arg_advance
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(cumulative_args_t, const function_arg_info &);
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extern HOST_WIDE_INT default_function_arg_offset (machine_mode, const_tree);
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extern pad_direction default_function_arg_padding (machine_mode, const_tree);
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extern rtx default_function_arg (cumulative_args_t, const function_arg_info &);
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extern rtx default_function_incoming_arg (cumulative_args_t,
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const function_arg_info &);
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extern unsigned int default_function_arg_boundary (machine_mode,
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const_tree);
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extern unsigned int default_function_arg_round_boundary (machine_mode,
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const_tree);
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extern bool hook_bool_const_rtx_commutative_p (const_rtx, int);
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extern rtx default_function_value (const_tree, const_tree, bool);
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extern HARD_REG_SET default_zero_call_used_regs (HARD_REG_SET);
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extern rtx default_libcall_value (machine_mode, const_rtx);
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extern bool default_function_value_regno_p (const unsigned int);
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extern rtx default_internal_arg_pointer (void);
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extern rtx default_static_chain (const_tree, bool);
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extern void default_trampoline_init (rtx, tree, rtx);
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extern void default_emit_call_builtin___clear_cache (rtx, rtx);
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extern poly_int64 default_return_pops_args (tree, tree, poly_int64);
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extern reg_class_t default_ira_change_pseudo_allocno_class (int, reg_class_t,
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reg_class_t);
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extern bool default_lra_p (void);
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extern int default_register_priority (int);
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extern bool default_register_usage_leveling_p (void);
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extern bool default_different_addr_displacement_p (void);
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extern reg_class_t default_secondary_reload (bool, rtx, reg_class_t,
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machine_mode,
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secondary_reload_info *);
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extern machine_mode default_secondary_memory_needed_mode (machine_mode);
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extern void default_target_option_override (void);
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extern void hook_void_bitmap (bitmap);
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extern int default_reloc_rw_mask (void);
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extern bool default_generate_pic_addr_diff_vec (void);
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extern tree default_mangle_decl_assembler_name (tree, tree);
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extern tree default_emutls_var_fields (tree, tree *);
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extern tree default_emutls_var_init (tree, tree, tree);
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extern unsigned int default_hard_regno_nregs (unsigned int, machine_mode);
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extern bool default_hard_regno_scratch_ok (unsigned int);
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extern bool default_mode_dependent_address_p (const_rtx, addr_space_t);
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extern bool default_new_address_profitable_p (rtx, rtx_insn *, rtx);
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extern bool default_target_option_valid_attribute_p (tree, tree, tree, int);
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extern bool default_target_option_pragma_parse (tree, tree);
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extern bool default_target_can_inline_p (tree, tree);
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extern bool default_valid_pointer_mode (scalar_int_mode);
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extern bool default_ref_may_alias_errno (class ao_ref *);
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extern scalar_int_mode default_addr_space_pointer_mode (addr_space_t);
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extern scalar_int_mode default_addr_space_address_mode (addr_space_t);
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extern bool default_addr_space_valid_pointer_mode (scalar_int_mode,
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addr_space_t);
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extern bool default_addr_space_legitimate_address_p (machine_mode, rtx,
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bool, addr_space_t);
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extern rtx default_addr_space_legitimize_address (rtx, rtx, machine_mode,
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addr_space_t);
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extern bool default_addr_space_subset_p (addr_space_t, addr_space_t);
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extern bool default_addr_space_zero_address_valid (addr_space_t);
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extern int default_addr_space_debug (addr_space_t);
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extern void default_addr_space_diagnose_usage (addr_space_t, location_t);
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extern rtx default_addr_space_convert (rtx, tree, tree);
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extern unsigned int default_case_values_threshold (void);
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extern bool default_have_conditional_execution (void);
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extern bool default_libc_has_function (enum function_class, tree);
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extern bool default_libc_has_fast_function (int fcode);
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extern bool no_c99_libc_has_function (enum function_class, tree);
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extern bool gnu_libc_has_function (enum function_class, tree);
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extern tree default_builtin_tm_load_store (tree);
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extern int default_memory_move_cost (machine_mode, reg_class_t, bool);
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extern int default_register_move_cost (machine_mode, reg_class_t,
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reg_class_t);
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extern bool default_slow_unaligned_access (machine_mode, unsigned int);
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extern HOST_WIDE_INT default_estimated_poly_value (poly_int64,
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poly_value_estimate_kind);
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extern bool default_use_by_pieces_infrastructure_p (unsigned HOST_WIDE_INT,
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unsigned int,
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enum by_pieces_operation,
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bool);
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extern int default_compare_by_pieces_branch_ratio (machine_mode);
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extern void default_print_patchable_function_entry_1 (FILE *,
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unsigned HOST_WIDE_INT,
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bool, unsigned int);
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extern void default_print_patchable_function_entry (FILE *,
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unsigned HOST_WIDE_INT,
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bool);
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extern bool default_profile_before_prologue (void);
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extern reg_class_t default_preferred_reload_class (rtx, reg_class_t);
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extern reg_class_t default_preferred_output_reload_class (rtx, reg_class_t);
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extern reg_class_t default_preferred_rename_class (reg_class_t rclass);
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extern bool default_class_likely_spilled_p (reg_class_t);
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extern unsigned char default_class_max_nregs (reg_class_t, machine_mode);
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extern enum unwind_info_type default_debug_unwind_info (void);
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extern void default_canonicalize_comparison (int *, rtx *, rtx *, bool);
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extern section * default_function_section(tree decl, enum node_frequency freq,
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bool startup, bool exit);
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extern unsigned int default_dwarf_poly_indeterminate_value (unsigned int,
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unsigned int *,
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int *);
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extern machine_mode default_dwarf_frame_reg_mode (int);
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extern fixed_size_mode default_get_reg_raw_mode (int);
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extern bool default_keep_leaf_when_profiled ();
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extern void *default_get_pch_validity (size_t *);
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extern const char *default_pch_valid_p (const void *, size_t);
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extern void default_asm_output_ident_directive (const char*);
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extern scalar_int_mode default_cstore_mode (enum insn_code);
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extern bool default_member_type_forces_blk (const_tree, machine_mode);
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extern void default_atomic_assign_expand_fenv (tree *, tree *, tree *);
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extern tree build_va_arg_indirect_ref (tree);
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extern tree std_gimplify_va_arg_expr (tree, tree, gimple_seq *, gimple_seq *);
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extern bool can_use_doloop_if_innermost (const widest_int &,
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const widest_int &,
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unsigned int, bool);
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extern rtx default_load_bounds_for_arg (rtx, rtx, rtx);
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extern void default_store_bounds_for_arg (rtx, rtx, rtx, rtx);
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extern rtx default_load_returned_bounds (rtx);
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extern void default_store_returned_bounds (rtx,rtx);
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extern bool default_optab_supported_p (int, machine_mode, machine_mode,
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optimization_type);
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extern unsigned int default_max_noce_ifcvt_seq_cost (edge);
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extern bool default_noce_conversion_profitable_p (rtx_insn *,
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struct noce_if_info *);
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extern unsigned int default_min_arithmetic_precision (void);
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extern enum flt_eval_method
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default_excess_precision (enum excess_precision_type ATTRIBUTE_UNUSED);
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extern HOST_WIDE_INT default_stack_clash_protection_alloca_probe_range (void);
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extern void default_select_early_remat_modes (sbitmap);
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extern tree default_preferred_else_value (unsigned, tree, unsigned, tree *);
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extern bool default_have_speculation_safe_value (bool);
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extern bool speculation_safe_value_not_needed (bool);
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extern rtx default_speculation_safe_value (machine_mode, rtx, rtx, rtx);
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extern bool default_memtag_can_tag_addresses ();
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extern uint8_t default_memtag_tag_size ();
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extern uint8_t default_memtag_granule_size ();
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extern rtx default_memtag_insert_random_tag (rtx, rtx);
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extern rtx default_memtag_add_tag (rtx, poly_int64, uint8_t);
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extern rtx default_memtag_set_tag (rtx, rtx, rtx);
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extern rtx default_memtag_extract_tag (rtx, rtx);
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extern rtx default_memtag_untagged_pointer (rtx, rtx);
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#endif /* GCC_TARGHOOKS_H */
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