extable.h

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#ifndef XTF_EXTABLE_H
#define XTF_EXTABLE_H

#include <xtf/types.h>
#include <xtf/asm_macros.h>
#include <xtf/macro_magic.h>

#ifdef __ASSEMBLY__

#define _ASM_EXTABLE_HANDLER(fault, fixup, handler) \
    .pushsection .ex_table, "a";                    \
    _WORD fault, fixup, handler;                    \
    .popsection

#else

#define _ASM_EXTABLE_HANDLER(fault, fixup, handler)             \
    ".pushsection .ex_table, \"a\";\n"                          \
    _WORD STR(fault) ", " STR(fixup) ", " STR(handler) ";\n"    \
    ".popsection;\n"

#endif

#define _ASM_EXTABLE(fault, fixup) _ASM_EXTABLE_HANDLER(fault, fixup, 0)

#define _ASM_TRAP_OK(loc) _ASM_EXTABLE(loc, loc)

#ifndef __ASSEMBLY__

struct cpu_regs;

struct extable_entry
{
    unsigned long fault; 
    unsigned long fixup; 
    bool (*handler)(struct cpu_regs *regs,
                    const struct extable_entry *ex);
};

void sort_extable(void);

const struct extable_entry *search_extable(unsigned long addr);

#include <arch/extable.h>

#endif /* __ASSEMBLY__ */

#endif /* XTF_EXTABLE_H */

/*
 * Local variables:
 * mode: C
 * c-file-style: "BSD"
 * c-basic-offset: 4
 * tab-width: 4
 * indent-tabs-mode: nil
 * End:
 */