2b3efe793e
gcc/ChangeLog: * config/riscv/riscv.cc (riscv_file_end): Add .note.gnu.property. libgcc/ChangeLog: * config/riscv/crti.S: Add lpad instructions. * config/riscv/crtn.S: Likewise. * config/riscv/save-restore.S: Likewise. * config/riscv/riscv-asm.h: Add GNU_PROPERTY for ZICFILP, ZICFISS. Co-Developed-by: Jesse Huang <jesse.huang@sifive.com>
108 lines
2.9 KiB
C
108 lines
2.9 KiB
C
/* Copyright (C) 2017-2025 Free Software Foundation, Inc.
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This file is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 3, or (at your option) any
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later version.
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This file is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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#define FUNC_TYPE(X) .type X,@function
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#define FUNC_SIZE(X) .size X,.-X
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#define FUNC_BEGIN(X) \
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.align 2; \
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.globl X; \
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FUNC_TYPE (X); \
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X: \
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LPAD
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#define FUNC_END(X) \
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FUNC_SIZE(X)
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#define FUNC_ALIAS(X,Y) \
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.globl X; \
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X = Y
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#define CONCAT1(a, b) CONCAT2(a, b)
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#define CONCAT2(a, b) a ## b
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#define HIDDEN_JUMPTARGET(X) CONCAT1(__hidden_, X)
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#define HIDDEN_DEF(X) FUNC_ALIAS(HIDDEN_JUMPTARGET(X), X); \
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.hidden HIDDEN_JUMPTARGET(X)
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/* GNU_PROPERTY_RISCV64_* macros from elf.h for use in asm code. */
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#define FEATURE_1_AND 0xc0000000
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#define FEATURE_1_FCFI 1
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#define FEATURE_1_BCFI 2
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/* Add a NT_GNU_PROPERTY_TYPE_0 note. */
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#if __riscv_xlen == 32
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# define GNU_PROPERTY(type, value) \
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.section .note.gnu.property, "a"; \
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.p2align 2; \
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.word 4; \
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.word 12; \
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.word 5; \
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.asciz "GNU"; \
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.word type; \
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.word 4; \
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.word value; \
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.text
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#else
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# define GNU_PROPERTY(type, value) \
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.section .note.gnu.property, "a"; \
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.p2align 3; \
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.word 4; \
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.word 16; \
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.word 5; \
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.asciz "GNU"; \
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.word type; \
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.word 4; \
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.word value; \
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.word 0; \
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.text
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#endif
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/* Add GNU property note with the supported features to all asm code
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where sysdep.h is included. */
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#undef __VALUE_FOR_FEATURE_1_AND
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#if defined (__riscv_zicfilp) || defined (__riscv_zicfiss)
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# if defined (__riscv_zicfilp)
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# if defined (__riscv_zicfiss)
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# define __VALUE_FOR_FEATURE_1_AND 0x3
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# else
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# define __VALUE_FOR_FEATURE_1_AND 0x1
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# endif
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# else
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# if defined (__riscv_zicfiss)
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# define __VALUE_FOR_FEATURE_1_AND 0x2
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# else
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# error "What?"
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# endif
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# endif
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#endif
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#if defined (__VALUE_FOR_FEATURE_1_AND)
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GNU_PROPERTY (FEATURE_1_AND, __VALUE_FOR_FEATURE_1_AND)
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#endif
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#undef __VALUE_FOR_FEATURE_1_AND
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#ifdef __riscv_zicfilp
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# define SET_LPAD lui t2, 0
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# define LPAD lpad 0
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#else
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# define SET_LPAD
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# define LPAD
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#endif
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