cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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jump_label.c (816B)

      1// SPDX-License-Identifier: GPL-2.0
      2#include <linux/kernel.h>
      3#include <linux/jump_label.h>
      4#include <asm/patch.h>
      5#include <asm/insn.h>
      6
      7static void __arch_jump_label_transform(struct jump_entry *entry,
      8					enum jump_label_type type,
      9					bool is_static)
     10{
     11	void *addr = (void *)entry->code;
     12	unsigned int insn;
     13
     14	if (type == JUMP_LABEL_JMP)
     15		insn = arm_gen_branch(entry->code, entry->target);
     16	else
     17		insn = arm_gen_nop();
     18
     19	if (is_static)
     20		__patch_text_early(addr, insn);
     21	else
     22		patch_text(addr, insn);
     23}
     24
     25void arch_jump_label_transform(struct jump_entry *entry,
     26			       enum jump_label_type type)
     27{
     28	__arch_jump_label_transform(entry, type, false);
     29}
     30
     31void arch_jump_label_transform_static(struct jump_entry *entry,
     32				      enum jump_label_type type)
     33{
     34	__arch_jump_label_transform(entry, type, true);
     35}