arch/arm/kernel/jump_label.c


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38

#include <linux/kernel.h>
#include <linux/jump_label.h>
#include <asm/patch.h>
#include <asm/insn.h>

#ifdef HAVE_JUMP_LABEL

static void __arch_jump_label_transform(struct jump_entry *entry,
					enum jump_label_type type,
					bool is_static)
{
	void *addr = (void *)entry->code;
	unsigned int insn;

	if (type == JUMP_LABEL_ENABLE)
		insn = arm_gen_branch(entry->code, entry->target);
	else
		insn = arm_gen_nop();

	if (is_static)
		__patch_text_early(addr, insn);
	else
		patch_text(addr, insn);
}

void arch_jump_label_transform(struct jump_entry *entry,
			       enum jump_label_type type)
{
	__arch_jump_label_transform(entry, type, false);
}

void arch_jump_label_transform_static(struct jump_entry *entry,
				      enum jump_label_type type)
{
	__arch_jump_label_transform(entry, type, true);
}

#endif