/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Please do not include this explicitly.
 * This is used by C files generated by modpost.
 */

#ifndef __LINUX_EXPORT_INTERNAL_H__
#define __LINUX_EXPORT_INTERNAL_H__

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

#if defined(CONFIG_HAVE_ARCH_PREL32_RELOCATIONS)
/*
 * relative reference: this reduces the size by half on 64-bit architectures,
 * and eliminates the need for absolute relocations that require runtime
 * processing on relocatable kernels.
 */
#define __KSYM_ALIGN            ".balign 4"
#define __KSYM_REF(sym)         ".long " #sym "- ."
#elif defined(CONFIG_64BIT)
#define __KSYM_ALIGN            ".balign 8"
#define __KSYM_REF(sym)         ".quad " #sym
#else
#define __KSYM_ALIGN            ".balign 4"
#define __KSYM_REF(sym)         ".long " #sym
#endif

/*
 * For every exported symbol, do the following:
 *
 * - Put the name of the symbol and namespace (empty string "" for none) in
 *   __ksymtab_strings.
 * - Place a struct kernel_symbol entry in the __ksymtab section.
 *
 * Note on .section use: we specify progbits since usage of the "M" (SHF_MERGE)
 * section flag requires it. Use '%progbits' instead of '@progbits' since the
 * former apparently works on all arches according to the binutils source.
 */
#define __KSYMTAB(name, sym, ns)                                                \
        asm("   .section \"__ksymtab_strings\",\"aMS\",%progbits,1"     "\n"    \
            "__kstrtab_" #name ":"                                      "\n"    \
            "   .asciz \"" #name "\""                                   "\n"    \
            "__kstrtabns_" #name ":"                                    "\n"    \
            "   .asciz \"" ns "\""                                      "\n"    \
            "   .previous"                                              "\n"    \
            "   .section \"___ksymtab+" #name "\", \"a\""               "\n"    \
                __KSYM_ALIGN                                            "\n"    \
            "__ksymtab_" #name ":"                                      "\n"    \
                __KSYM_REF(sym)                                         "\n"    \
                __KSYM_REF(__kstrtab_ ##name)                           "\n"    \
                __KSYM_REF(__kstrtabns_ ##name)                         "\n"    \
            "   .previous"                                              "\n"    \
        )

#if defined(CONFIG_PARISC) && defined(CONFIG_64BIT)
#define KSYM_FUNC(name)         P%name
#else
#define KSYM_FUNC(name)         name
#endif

#define KSYMTAB_FUNC(name, ns)  __KSYMTAB(name, KSYM_FUNC(name), ns)
#define KSYMTAB_DATA(name, ns)  __KSYMTAB(name, name, ns)

#define SYMBOL_CRC(sym, crc)                                    \
        asm("   .section \"___kcrctab+" #sym "\",\"a\"" "\n"    \
            "   .balign 4"                              "\n"    \
            "__crc_" #sym ":"                           "\n"    \
            "   .long " #crc                            "\n"    \
            "   .previous"                              "\n"    \
        )

#define SYMBOL_FLAGS(sym, flags)                                        \
        asm("   .section \"___kflagstab+" #sym "\",\"a\""       "\n"    \
            "__flags_" #sym ":"                                 "\n"    \
            "   .byte " #flags                                  "\n"    \
            "   .previous"                                      "\n"    \
        )

#endif /* __LINUX_EXPORT_INTERNAL_H__ */