/*
 * Copyright 2002-2012 Haiku, Inc. All Rights Reserved.
 * Distributed under the terms of the MIT License.
 */
#ifndef _ARCH_X86_64_SIGNAL_H_
#define _ARCH_X86_64_SIGNAL_H_


/*
 * Architecture-specific structure passed to signal handlers
 */


struct x86_64_fp_register {
        unsigned char value[10];
        unsigned char reserved[6];
};

struct x86_64_xmm_register {
        unsigned char value[16];
};


// The layout of this struct matches the one used by the FXSAVE instruction
struct fpu_state {
        unsigned short          control;
        unsigned short          status;
        unsigned short          tag;
        unsigned short          opcode;
        unsigned long           rip;
        unsigned long           rdp;
        unsigned int            mxcsr;
        unsigned int            mxcsr_mask;

        union {
                struct x86_64_fp_register fp[8];
                struct x86_64_fp_register mmx[8];
        };

        struct x86_64_xmm_register              xmm[16];
        unsigned char           _reserved_416_463[48];

        // This area is explicitly not read and written by the XSAVE and FXSAVE instructions
        // according to Intel documentation. Which is good news, because we have a few more things
        // of our own to store...

        unsigned long           fault_address;
        unsigned long           error_code;
        unsigned short          cs;
        unsigned short          ss;
        unsigned char           trap_number;

        unsigned char           _available_485_511[27];
};


struct xstate_hdr {
        unsigned long           bv;
        unsigned long           xcomp_bv;
        unsigned char           _reserved[48];
};


// The layout of this struct matches the one used by the XSAVE instruction on
// an AVX CPU
struct savefpu {
        struct fpu_state                        fp_fxsave;
        struct xstate_hdr                       fp_xstate;
        struct x86_64_xmm_register      fp_ymm[16];
                // The high half of the YMM registers, to combine with the low half
                // found in fp_fxsave.xmm
};


#ifdef __x86_64__


struct vregs {
        unsigned long           rax;
        unsigned long           rbx;
        unsigned long           rcx;
        unsigned long           rdx;
        unsigned long           rdi;
        unsigned long           rsi;
        unsigned long           rbp;
        unsigned long           r8;
        unsigned long           r9;
        unsigned long           r10;
        unsigned long           r11;
        unsigned long           r12;
        unsigned long           r13;
        unsigned long           r14;
        unsigned long           r15;

        unsigned long           rsp;
        unsigned long           rip;
        unsigned long           rflags;

        struct savefpu          fpu;
};


#endif


#endif /* _ARCH_X86_64_SIGNAL_H_ */