bsd/ppc/signal.h

   1 /*
   2  * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_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. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23 /*
  24  * Copyright (c) 1992, 1993 NeXT Computer, Inc.
  25  */
  26
  27 #ifndef _PPC_SIGNAL_
  28 #define _PPC_SIGNAL_ 1
  29
  30 #include <sys/appleapiopts.h>
  31
  32 #ifdef __APPLE_API_OBSOLETE
  33 typedef int sig_atomic_t;
  34
  35 /*
  36  * Machine-dependant flags used in sigvec call.
  37  */
  38 #define SV_SAVE_REGS    0x1000  /* Save all regs in sigcontext */
  39
  40 /*
  41  * regs_saved_t -- Describes which registers beyond what the kernel cares
  42  *                 about are saved to and restored from this sigcontext.
  43  *
  44  * The default is REGS_SAVED_CALLER, only the caller saved registers
  45  * are saved.  If the SV_SAVE_REGS flag was set when the signal
  46  * handler was registered with sigvec() then all the registers will be
  47  * saved in the sigcontext, and REGS_SAVED_ALL will be set.  The C
  48  * library uses REGS_SAVED_NONE in order to quickly restore kernel
  49  * state during a longjmp().
  50  */
  51 typedef enum {
  52         REGS_SAVED_NONE,                /* Only kernel managed regs restored */
  53         REGS_SAVED_CALLER,              /* "Caller saved" regs: rpc, a0-a7,
  54                                            t0-t4, at, lk0-lk1, xt1-xt20,
  55                                            xr0-xr1 */
  56         REGS_SAVED_ALL                  /* All registers */
  57 } regs_saved_t;
  58
  59
  60 /*
  61  * Information pushed on stack when a signal is delivered.
  62  * This is used by the kernel to restore state following
  63  * execution of the signal handler.  It is also made available
  64  * to the handler to allow it to properly restore state if
  65  * a non-standard exit is performed.
  66  */
  67 struct sigcontext32 {
  68     int         sc_onstack;     /* sigstack state to restore */
  69     int         sc_mask;        /* signal mask to restore */
  70     int         sc_ir;                  /* pc */
  71     int         sc_psw;         /* processor status word */
  72     int         sc_sp;          /* stack pointer if sc_regs == NULL */
  73     void        *sc_regs;               /* (kernel private) saved state */
  74 };
  75
  76 struct sigcontext64 {
  77     int         sc_onstack;     /* sigstack state to restore */
  78     int         sc_mask;        /* signal mask to restore */
  79     long long   sc_ir;          /* pc */
  80     long long   sc_psw;         /* processor status word */
  81     long long   sc_sp;          /* stack pointer if sc_regs == NULL */
  82     void        *sc_regs;       /* (kernel private) saved state */
  83 };
  84
  85 /*
  86  * LP64todo - Have to decide how to handle this.
  87  * For now, just duplicate the 32-bit context as the generic one.
  88  */
  89 struct sigcontext {
  90     int         sc_onstack;     /* sigstack state to restore */
  91     int         sc_mask;        /* signal mask to restore */
  92     int         sc_ir;                  /* pc */
  93     int         sc_psw;         /* processor status word */
  94     int         sc_sp;          /* stack pointer if sc_regs == NULL */
  95     void        *sc_regs;               /* (kernel private) saved state */
  96 };
  97
  98 #endif /* __APPLE_API_OBSOLETE */
  99
 100 #endif /* _PPC_SIGNAL_ */
 101