/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_X86_IA32_H
#define _ASM_X86_IA32_H

#ifdef CONFIG_IA32_EMULATION

#include <linux/compat.h>

/*
 * 32 bit structures for IA32 support.
 */

#include <uapi/asm/sigcontext.h>

/* signal.h */

struct ucontext_ia32 {
        unsigned int      uc_flags;
        unsigned int      uc_link;
        compat_stack_t    uc_stack;
        struct sigcontext_32 uc_mcontext;
        compat_sigset_t   uc_sigmask;   /* mask last for extensibility */
};

/* This matches struct stat64 in glibc2.2, hence the absolutely
 * insane amounts of padding around dev_t's.
 */
struct stat64 {
        unsigned long long      st_dev;
        unsigned char           __pad0[4];

#define STAT64_HAS_BROKEN_ST_INO        1
        unsigned int            __st_ino;

        unsigned int            st_mode;
        unsigned int            st_nlink;

        unsigned int            st_uid;
        unsigned int            st_gid;

        unsigned long long      st_rdev;
        unsigned char           __pad3[4];

        long long               st_size;
        unsigned int            st_blksize;

        long long               st_blocks;/* Number 512-byte blocks allocated */

        unsigned                st_atime;
        unsigned                st_atime_nsec;
        unsigned                st_mtime;
        unsigned                st_mtime_nsec;
        unsigned                st_ctime;
        unsigned                st_ctime_nsec;

        unsigned long long      st_ino;
} __attribute__((packed));

extern bool __ia32_enabled;

static __always_inline bool ia32_enabled(void)
{
        return __ia32_enabled;
}

static inline void ia32_disable(void)
{
        __ia32_enabled = false;
}

#else /* !CONFIG_IA32_EMULATION */

static __always_inline bool ia32_enabled(void)
{
        return IS_ENABLED(CONFIG_X86_32);
}

static inline void ia32_disable(void) {}

#endif

static inline bool ia32_enabled_verbose(void)
{
        bool enabled = ia32_enabled();

        if (IS_ENABLED(CONFIG_IA32_EMULATION) && !enabled)
                pr_notice_once("32-bit emulation disabled. You can reenable with ia32_emulation=on\n");

        return enabled;
}

#endif /* _ASM_X86_IA32_H */