FreeBSD/Linux Kernel Cross Reference
sys/x86/include/reg.h

     /*-
      * SPDX-License-Identifier: BSD-3-Clause
      *
      * Copyright (c) 2003 Peter Wemm.
      * Copyright (c) 1990 The Regents of the University of California.
      * All rights reserved.
      *
      * This code is derived from software contributed to Berkeley by
      * William Jolitz.
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      from: @(#)reg.h 5.5 (Berkeley) 1/18/91
     * $FreeBSD$
     */
    
    #ifndef _MACHINE_REG_H_
    #define _MACHINE_REG_H_
    
    #include <machine/_types.h>
    
    #ifdef __i386__
    /*
     * Indices for registers in `struct trapframe' and `struct regs'.
     *
     * This interface is deprecated.  In the kernel, it is only used in FPU
     * emulators to convert from register numbers encoded in instructions to
     * register values.  Everything else just accesses the relevant struct
     * members.  In userland, debuggers tend to abuse this interface since
     * they don't understand that `struct regs' is a struct.  I hope they have
     * stopped accessing the registers in the trap frame via PT_{READ,WRITE}_U
     * and we can stop supporting the user area soon.
     */
    #define tFS     (0)
    #define tES     (1)
    #define tDS     (2)
    #define tEDI    (3)
    #define tESI    (4)
    #define tEBP    (5)
    #define tISP    (6)
    #define tEBX    (7)
    #define tEDX    (8)
    #define tECX    (9)
    #define tEAX    (10)
    #define tERR    (12)
    #define tEIP    (13)
    #define tCS     (14)
    #define tEFLAGS (15)
    #define tESP    (16)
    #define tSS     (17)
    
    /*
     * Indices for registers in `struct regs' only.
     *
     * Some registers live in the pcb and are only in an "array" with the
     * other registers in application interfaces that copy all the registers
     * to or from a `struct regs'.
     */
    #define tGS     (18)
    #endif /* __i386__ */
    
    /* Rename the structs below depending on the machine architecture. */
    #ifdef  __i386__
    #define __reg32         reg
    #define __fpreg32       fpreg
    #define __dbreg32       dbreg
    #else
    #define __reg32         reg32
    #define __reg64         reg
    #define __fpreg32       fpreg32
    #define __fpreg64       fpreg
    #define __dbreg32       dbreg32
    #define __dbreg64       dbreg
    #define __HAVE_REG32
    #endif
    
    /*
    * Register set accessible via /proc/$pid/regs and PT_{SET,GET}REGS.
    */
   struct __reg32 {
           __uint32_t      r_fs;
           __uint32_t      r_es;
           __uint32_t      r_ds;
           __uint32_t      r_edi;
           __uint32_t      r_esi;
           __uint32_t      r_ebp;
           __uint32_t      r_isp;
           __uint32_t      r_ebx;
           __uint32_t      r_edx;
           __uint32_t      r_ecx;
           __uint32_t      r_eax;
           __uint32_t      r_trapno;
           __uint32_t      r_err;
           __uint32_t      r_eip;
           __uint32_t      r_cs;
           __uint32_t      r_eflags;
           __uint32_t      r_esp;
           __uint32_t      r_ss;
           __uint32_t      r_gs;
   };
   
   struct __reg64 {
           __int64_t       r_r15;
           __int64_t       r_r14;
           __int64_t       r_r13;
           __int64_t       r_r12;
           __int64_t       r_r11;
           __int64_t       r_r10;
           __int64_t       r_r9;
           __int64_t       r_r8;
           __int64_t       r_rdi;
           __int64_t       r_rsi;
           __int64_t       r_rbp;
           __int64_t       r_rbx;
           __int64_t       r_rdx;
           __int64_t       r_rcx;
           __int64_t       r_rax;
           __uint32_t      r_trapno;
           __uint16_t      r_fs;
           __uint16_t      r_gs;
           __uint32_t      r_err;
           __uint16_t      r_es;
           __uint16_t      r_ds;
           __int64_t       r_rip;
           __int64_t       r_cs;
           __int64_t       r_rflags;
           __int64_t       r_rsp;
           __int64_t       r_ss;
   };
   
   /*
    * Register set accessible via /proc/$pid/fpregs.
    *
    * XXX should get struct from fpu.h.  Here we give a slightly
    * simplified struct.  This may be too much detail.  Perhaps
    * an array of unsigned longs is best.
    */
   struct __fpreg32 {
           __uint32_t      fpr_env[7];
           __uint8_t       fpr_acc[8][10];
           __uint32_t      fpr_ex_sw;
           __uint8_t       fpr_pad[64];
   };
   
   struct __fpreg64 {
           __uint64_t      fpr_env[4];
           __uint8_t       fpr_acc[8][16];
           __uint8_t       fpr_xacc[16][16];
           __uint64_t      fpr_spare[12];
   };
   
   /*
    * Register set accessible via PT_GETXMMREGS (i386).
    */
   struct xmmreg {
           /*
            * XXX should get struct from npx.h.  Here we give a slightly
            * simplified struct.  This may be too much detail.  Perhaps
            * an array of unsigned longs is best.
            */
           __uint32_t      xmm_env[8];
           __uint8_t       xmm_acc[8][16];
           __uint8_t       xmm_reg[8][16];
           __uint8_t       xmm_pad[224];
   };
   
   /*
    * Register set accessible via /proc/$pid/dbregs.
    */
   struct __dbreg32 {
           __uint32_t      dr[8];  /* debug registers */
                                   /* Index 0-3: debug address registers */
                                   /* Index 4-5: reserved */
                                   /* Index 6: debug status */
                                   /* Index 7: debug control */
   };
   
   struct __dbreg64 {
           __uint64_t      dr[16]; /* debug registers */
                                   /* Index 0-3: debug address registers */
                                   /* Index 4-5: reserved */
                                   /* Index 6: debug status */
                                   /* Index 7: debug control */
                                   /* Index 8-15: reserved */
   };
   
   #define DBREG_DR6_RESERVED1     0xffff0ff0
   #define DBREG_DR6_BMASK         0x000f
   #define DBREG_DR6_B(i)          (1 << (i))
   #define DBREG_DR6_BD            0x2000
   #define DBREG_DR6_BS            0x4000
   #define DBREG_DR6_BT            0x8000
   
   #define DBREG_DR7_RESERVED1     0x0400
   #define DBREG_DR7_LOCAL_ENABLE  0x01
   #define DBREG_DR7_GLOBAL_ENABLE 0x02
   #define DBREG_DR7_LEN_1         0x00    /* 1 byte length          */
   #define DBREG_DR7_LEN_2         0x01
   #define DBREG_DR7_LEN_4         0x03
   #define DBREG_DR7_LEN_8         0x02
   #define DBREG_DR7_EXEC          0x00    /* break on execute       */
   #define DBREG_DR7_WRONLY        0x01    /* break on write         */
   #define DBREG_DR7_RDWR          0x03    /* break on read or write */
   #define DBREG_DR7_MASK(i)       \
           ((__u_register_t)(0xf) << ((i) * 4 + 16) | 0x3 << (i) * 2)
   #define DBREG_DR7_SET(i, len, access, enable)                           \
           ((__u_register_t)((len) << 2 | (access)) << ((i) * 4 + 16) |    \
           (enable) << (i) * 2)
   #define DBREG_DR7_GD            0x2000
   #define DBREG_DR7_ENABLED(d, i) (((d) & 0x3 << (i) * 2) != 0)
   #define DBREG_DR7_ACCESS(d, i)  ((d) >> ((i) * 4 + 16) & 0x3)
   #define DBREG_DR7_LEN(d, i)     ((d) >> ((i) * 4 + 18) & 0x3)
   
   #define DBREG_DRX(d,x)  ((d)->dr[(x)])  /* reference dr0 - dr7 by
                                              register number */
   
   #undef __reg32
   #undef __reg64
   #undef __fpreg32
   #undef __fpreg64
   #undef __dbreg32
   #undef __dbreg64
   
   #ifdef _KERNEL
   struct thread;
   
   /*
    * XXX these interfaces are MI, so they should be declared in a MI place.
    */
   int     fill_regs(struct thread *, struct reg *);
   int     fill_frame_regs(struct trapframe *, struct reg *);
   int     set_regs(struct thread *, struct reg *);
   int     fill_fpregs(struct thread *, struct fpreg *);
   int     set_fpregs(struct thread *, struct fpreg *);
   int     fill_dbregs(struct thread *, struct dbreg *);
   int     set_dbregs(struct thread *, struct dbreg *);
   #ifdef COMPAT_FREEBSD32
   int     fill_regs32(struct thread *, struct reg32 *);
   int     set_regs32(struct thread *, struct reg32 *);
   int     fill_fpregs32(struct thread *, struct fpreg32 *);
   int     set_fpregs32(struct thread *, struct fpreg32 *);
   int     fill_dbregs32(struct thread *, struct dbreg32 *);
   int     set_dbregs32(struct thread *, struct dbreg32 *);
   #endif
   #endif
   
   #endif /* !_MACHINE_REG_H_ */

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