bsd/ppc/signal.h

   1 /*
   2  * Copyright (c) 2006 Apple Computer, Inc. All Rights Reserved.
   3  *
   4  * @APPLE_LICENSE_OSREFERENCE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License.  The rights granted to you under the
  10  * License may not be used to create, or enable the creation or
  11  * redistribution of, unlawful or unlicensed copies of an Apple operating
  12  * system, or to circumvent, violate, or enable the circumvention or
  13  * violation of, any terms of an Apple operating system software license
  14  * agreement.
  15  *
  16  * Please obtain a copy of the License at
  17  * http://www.opensource.apple.com/apsl/ and read it before using this
  18  * file.
  19  *
  20  * The Original Code and all software distributed under the License are
  21  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  22  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  23  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  25  * Please see the License for the specific language governing rights and
  26  * limitations under the License.
  27  *
  28  * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  29  */
  30 /*
  31  * Copyright (c) 1992, 1993 NeXT Computer, Inc.
  32  */
  33
  34 #ifndef _PPC_SIGNAL_
  35 #define _PPC_SIGNAL_ 1
  36
  37 #include <sys/appleapiopts.h>
  38
  39 #ifdef __APPLE_API_OBSOLETE
  40 typedef int sig_atomic_t;
  41
  42 /*
  43  * Machine-dependant flags used in sigvec call.
  44  */
  45 #define SV_SAVE_REGS    0x1000  /* Save all regs in sigcontext */
  46
  47 /*
  48  * regs_saved_t -- Describes which registers beyond what the kernel cares
  49  *                 about are saved to and restored from this sigcontext.
  50  *
  51  * The default is REGS_SAVED_CALLER, only the caller saved registers
  52  * are saved.  If the SV_SAVE_REGS flag was set when the signal
  53  * handler was registered with sigvec() then all the registers will be
  54  * saved in the sigcontext, and REGS_SAVED_ALL will be set.  The C
  55  * library uses REGS_SAVED_NONE in order to quickly restore kernel
  56  * state during a longjmp().
  57  */
  58 typedef enum {
  59         REGS_SAVED_NONE,                /* Only kernel managed regs restored */
  60         REGS_SAVED_CALLER,              /* "Caller saved" regs: rpc, a0-a7,
  61                                            t0-t4, at, lk0-lk1, xt1-xt20,
  62                                            xr0-xr1 */
  63         REGS_SAVED_ALL                  /* All registers */
  64 } regs_saved_t;
  65
  66
  67 /*
  68  * Information pushed on stack when a signal is delivered.
  69  * This is used by the kernel to restore state following
  70  * execution of the signal handler.  It is also made available
  71  * to the handler to allow it to properly restore state if
  72  * a non-standard exit is performed.
  73  */
  74 struct sigcontext32 {
  75     int         sc_onstack;     /* sigstack state to restore */
  76     int         sc_mask;        /* signal mask to restore */
  77     int         sc_ir;                  /* pc */
  78     int         sc_psw;         /* processor status word */
  79     int         sc_sp;          /* stack pointer if sc_regs == NULL */
  80     void        *sc_regs;               /* (kernel private) saved state */
  81 };
  82
  83 struct sigcontext64 {
  84     int         sc_onstack;     /* sigstack state to restore */
  85     int         sc_mask;        /* signal mask to restore */
  86     long long   sc_ir;          /* pc */
  87     long long   sc_psw;         /* processor status word */
  88     long long   sc_sp;          /* stack pointer if sc_regs == NULL */
  89     void        *sc_regs;       /* (kernel private) saved state */
  90 };
  91
  92 /*
  93  * LP64todo - Have to decide how to handle this.
  94  * For now, just duplicate the 32-bit context as the generic one.
  95  */
  96 struct sigcontext {
  97     int         sc_onstack;     /* sigstack state to restore */
  98     int         sc_mask;        /* signal mask to restore */
  99     int         sc_ir;                  /* pc */
 100     int         sc_psw;         /* processor status word */
 101     int         sc_sp;          /* stack pointer if sc_regs == NULL */
 102     void        *sc_regs;               /* (kernel private) saved state */
 103 };
 104
 105 #endif /* __APPLE_API_OBSOLETE */
 106
 107 #endif /* _PPC_SIGNAL_ */
 108