/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_X86_JUMP_LABEL_H
#define _ASM_X86_JUMP_LABEL_H

#define HAVE_JUMP_LABEL_BATCH

#include <asm/asm.h>
#include <asm/nops.h>

#ifndef __ASSEMBLY__

#include <asm/alternative.h>

#include <linux/stringify.h>
#include <linux/types.h>

#define JUMP_TABLE_ENTRY                \
    ".pushsection __jump_table,  \"aw\" \n\t"    \
    _ASM_ALIGN "\n\t"                \
    ".long 1b - . \n\t"                \
    ".long %l[l_yes] - . \n\t"            \
    _ASM_PTR "%c0 + %c1 - .\n\t"            \
    ".popsection \n\t"

#ifdef CONFIG_HAVE_JUMP_LABEL_HACK

static __always_inline bool arch_static_branch(struct static_key *key, bool branch)
{
    asm goto(RAP_SAFE_ASM "1:"
        PAX_JMP("%l[l_yes]")"; # objtool NOPs this \n\t"
        JUMP_TABLE_ENTRY
        : :  "i" (key), "i" (2 | branch) : : l_yes);

    return false;
l_yes:
    return true;
}

#else /* !CONFIG_HAVE_JUMP_LABEL_HACK */

static __always_inline bool arch_static_branch(struct static_key * const key, const bool branch)
{
    asm goto(RAP_SAFE_ASM "1:"
#ifdef CONFIG_SLS
        /* 6 byte NOP to leave room for JMP32 + INT3 */
        ".byte " __stringify(BYTES_NOP6) "\n\t"
#else
        ".byte " __stringify(BYTES_NOP5) "\n\t"
#endif
        JUMP_TABLE_ENTRY
        : :  "i" (key), "i" (branch) : : l_yes);

    return false;
l_yes:
    return true;
}

#endif /* CONFIG_HAVE_JUMP_LABEL_HACK */

static __always_inline bool arch_static_branch_jump(struct static_key * const key, const bool branch)
{
    asm goto(RAP_SAFE_ASM "1:"
        PAX_JMP("%l[l_yes]")"\n\t"
        JUMP_TABLE_ENTRY
        : :  "i" (key), "i" (branch) : : l_yes);

    return false;
l_yes:
    return true;
}

extern int arch_jump_entry_size(struct jump_entry *entry);

#endif    /* __ASSEMBLY__ */

#endif