50 lines
1,009 B
C
50 lines
1,009 B
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _ASM_ARM_JUMP_LABEL_H
|
|
#define _ASM_ARM_JUMP_LABEL_H
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#include <linux/types.h>
|
|
#include <asm/unified.h>
|
|
|
|
#define JUMP_LABEL_NOP_SIZE 4
|
|
|
|
static __always_inline bool arch_static_branch(struct static_key *key, bool branch)
|
|
{
|
|
asm_volatile_goto("1:\n\t"
|
|
WASM(nop) "\n\t"
|
|
".pushsection __jump_table, \"aw\"\n\t"
|
|
".word 1b, %l[l_yes], %c0\n\t"
|
|
".popsection\n\t"
|
|
: : "i" (&((char *)key)[branch]) : : l_yes);
|
|
|
|
return false;
|
|
l_yes:
|
|
return true;
|
|
}
|
|
|
|
static __always_inline bool arch_static_branch_jump(struct static_key *key, bool branch)
|
|
{
|
|
asm_volatile_goto("1:\n\t"
|
|
WASM(b) " %l[l_yes]\n\t"
|
|
".pushsection __jump_table, \"aw\"\n\t"
|
|
".word 1b, %l[l_yes], %c0\n\t"
|
|
".popsection\n\t"
|
|
: : "i" (&((char *)key)[branch]) : : l_yes);
|
|
|
|
return false;
|
|
l_yes:
|
|
return true;
|
|
}
|
|
|
|
typedef u32 jump_label_t;
|
|
|
|
struct jump_entry {
|
|
jump_label_t code;
|
|
jump_label_t target;
|
|
jump_label_t key;
|
|
};
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
#endif
|