/*
 * Copyright 2012, Alex Smith, alex@alex-smith.me.uk.
 * Distributed under the terms of the MIT License.
 */
#ifndef _KERNEL_ARCH_X86_64_IFRAME_H
#define _KERNEL_ARCH_X86_64_IFRAME_H


struct iframe {
        uint64 type;
        void* fpu;
        uint64 r15;
        uint64 r14;
        uint64 r13;
        uint64 r12;
        uint64 r11;
        uint64 r10;
        uint64 r9;
        uint64 r8;
        uint64 bp;
        uint64 si;
        uint64 di;
        uint64 dx;
        uint64 cx;
        uint64 bx;
        uint64 ax;
        uint64 orig_rax;
        uint64 vector;
        uint64 error_code;
        uint64 ip;
        uint64 cs;
        uint64 flags;

        // SP and SS are unconditionally present on x86_64, make both names
        // available.
        union {
                uint64 sp;
                uint64 user_sp;
        };
        union {
                uint64 ss;
                uint64 user_ss;
        };
} _PACKED;

#define IFRAME_IS_USER(f)       (((f)->cs & DPL_USER) == DPL_USER)


#endif  /* _KERNEL_ARCH_X86_64_IFRAME_H */