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

     /*-
      * SPDX-License-Identifier: BSD-3-Clause
      *
      * Copyright (c) 1986, 1989, 1991, 1993
      *      The Regents of the University of California.  All rights reserved.
      * Copyright (c) 2003 Peter Wemm.
      *
      * 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.
     *
     *      @(#)signal.h    8.1 (Berkeley) 6/11/93
     * $FreeBSD$
     */
    
    #ifndef _X86_SIGNAL_H
    #define _X86_SIGNAL_H 1
    
    /*
     * Machine-dependent signal definitions
     */
    
    #include <sys/cdefs.h>
    #include <sys/_sigset.h>
    
    #ifdef __i386__
    typedef int sig_atomic_t;
    
    #if __BSD_VISIBLE
    struct sigcontext {
            struct __sigset sc_mask;        /* signal mask to restore */
            int     sc_onstack;             /* sigstack state to restore */
            int     sc_gs;                  /* machine state (struct trapframe) */
            int     sc_fs;
            int     sc_es;
            int     sc_ds;
            int     sc_edi;
            int     sc_esi;
            int     sc_ebp;
            int     sc_isp;
            int     sc_ebx;
            int     sc_edx;
            int     sc_ecx;
            int     sc_eax;
            int     sc_trapno;
            int     sc_err;
            int     sc_eip;
            int     sc_cs;
            int     sc_efl;
            int     sc_esp;
            int     sc_ss;
            int     sc_len;                 /* sizeof(mcontext_t) */
            /*
             * See <machine/ucontext.h> and <machine/npx.h> for
             * the following fields.
             */
            int     sc_fpformat;
            int     sc_ownedfp;
            int     sc_flags;
            int     sc_fpstate[128] __aligned(16);
    
            int     sc_fsbase;
            int     sc_gsbase;
    
            int     sc_xfpustate;
            int     sc_xfpustate_len;
    
            int     sc_spare2[4];
    };
    
    #define sc_sp           sc_esp
    #define sc_fp           sc_ebp
    #define sc_pc           sc_eip
    #define sc_ps           sc_efl
    #define sc_eflags       sc_efl
    
    #endif /* __BSD_VISIBLE */
    #endif /* __i386__ */
    
   #ifdef __amd64__
   typedef long sig_atomic_t;
   
   #if __BSD_VISIBLE
   /*
    * Information pushed on stack when a signal is delivered.
    * This is used by the kernel to restore state following
    * execution of the signal handler.  It is also made available
    * to the handler to allow it to restore state properly if
    * a non-standard exit is performed.
    *
    * The sequence of the fields/registers after sc_mask in struct
    * sigcontext must match those in mcontext_t and struct trapframe.
    */
   struct sigcontext {
           struct __sigset sc_mask;        /* signal mask to restore */
           long    sc_onstack;             /* sigstack state to restore */
           long    sc_rdi;         /* machine state (struct trapframe) */
           long    sc_rsi;
           long    sc_rdx;
           long    sc_rcx;
           long    sc_r8;
           long    sc_r9;
           long    sc_rax;
           long    sc_rbx;
           long    sc_rbp;
           long    sc_r10;
           long    sc_r11;
           long    sc_r12;
           long    sc_r13;
           long    sc_r14;
           long    sc_r15;
           int     sc_trapno;
           short   sc_fs;
           short   sc_gs;
           long    sc_addr;
           int     sc_flags;
           short   sc_es;
           short   sc_ds;
           long    sc_err;
           long    sc_rip;
           long    sc_cs;
           long    sc_rflags;
           long    sc_rsp;
           long    sc_ss;
           long    sc_len;                 /* sizeof(mcontext_t) */
           /*
            * See <machine/ucontext.h> and <machine/fpu.h> for the following
            * fields.
            */
           long    sc_fpformat;
           long    sc_ownedfp;
           long    sc_fpstate[64] __aligned(16);
   
           long    sc_fsbase;
           long    sc_gsbase;
   
           long    sc_xfpustate;
           long    sc_xfpustate_len;
   
           long    sc_spare[4];
   };
   #endif /* __BSD_VISIBLE */
   #endif /* __amd64__ */
   
   #endif

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