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38 lines
1.0 KiB
38 lines
1.0 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Copyright (C) 2013 Huawei Ltd. |
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* Author: Jiang Liu <[email protected]> |
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* |
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* Based on arch/arm/kernel/jump_label.c |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/jump_label.h> |
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#include <asm/insn.h> |
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void arch_jump_label_transform(struct jump_entry *entry, |
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enum jump_label_type type) |
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{ |
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void *addr = (void *)jump_entry_code(entry); |
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u32 insn; |
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if (type == JUMP_LABEL_JMP) { |
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insn = aarch64_insn_gen_branch_imm(jump_entry_code(entry), |
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jump_entry_target(entry), |
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AARCH64_INSN_BRANCH_NOLINK); |
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} else { |
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insn = aarch64_insn_gen_nop(); |
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} |
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aarch64_insn_patch_text_nosync(addr, insn); |
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} |
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void arch_jump_label_transform_static(struct jump_entry *entry, |
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enum jump_label_type type) |
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{ |
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/* |
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* We use the architected A64 NOP in arch_static_branch, so there's no |
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* need to patch an identical A64 NOP over the top of it here. The core |
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* will call arch_jump_label_transform from a module notifier if the |
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* NOP needs to be replaced by a branch. |
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*/ |
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}
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