1  /* Copyright (C) 1996-2023 Free Software Foundation, Inc.
       2     This file is part of the GNU C Library.
       3  
       4     The GNU C Library is free software; you can redistribute it and/or
       5     modify it under the terms of the GNU Lesser General Public
       6     License as published by the Free Software Foundation; either
       7     version 2.1 of the License, or (at your option) any later version.
       8  
       9     The GNU C Library is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12     Lesser General Public License for more details.
      13  
      14     You should have received a copy of the GNU Lesser General Public
      15     License along with the GNU C Library; if not, see
      16     <https://www.gnu.org/licenses/>.  */
      17  
      18  #ifndef _BITS_SIGCONTEXT_H
      19  #define _BITS_SIGCONTEXT_H 1
      20  
      21  #if !defined _SIGNAL_H && !defined _SYS_UCONTEXT_H
      22  # error "Never use <bits/sigcontext.h> directly; include <signal.h> instead."
      23  #endif
      24  
      25  #define __need_size_t
      26  #include <stddef.h>
      27  #include <bits/sigstack.h>
      28  #include <bits/types/struct_sigstack.h>
      29  #include <bits/types/stack_t.h>
      30  #include <bits/ss_flags.h>
      31  
      32  struct __ia64_fpreg
      33    {
      34      union
      35        {
      36  	unsigned long bits[2];
      37        } u;
      38    } __attribute__ ((__aligned__ (16)));
      39  
      40  struct sigcontext
      41  {
      42    unsigned long int sc_flags;	/* see manifest constants below */
      43    unsigned long int sc_nat;	/* bit i == 1 iff scratch reg gr[i] is a NaT */
      44    stack_t sc_stack;		/* previously active stack */
      45  
      46    unsigned long int sc_ip;	/* instruction pointer */
      47    unsigned long int sc_cfm;	/* current frame marker */
      48    unsigned long int sc_um;	/* user mask bits */
      49    unsigned long int sc_ar_rsc;	/* register stack configuration register */
      50    unsigned long int sc_ar_bsp;	/* backing store pointer */
      51    unsigned long int sc_ar_rnat;	/* RSE NaT collection register */
      52    unsigned long int sc_ar_ccv;	/* compare & exchange compare value register */
      53    unsigned long int sc_ar_unat;	/* ar.unat of interrupted context */
      54    unsigned long int sc_ar_fpsr;	/* floating-point status register */
      55    unsigned long int sc_ar_pfs;	/* previous function state */
      56    unsigned long int sc_ar_lc;	/* loop count register */
      57    unsigned long int sc_pr;	/* predicate registers */
      58    unsigned long int sc_br[8];	/* branch registers */
      59    unsigned long int sc_gr[32];	/* general registers (static partition) */
      60    struct __ia64_fpreg sc_fr[128];	/* floating-point registers */
      61    unsigned long int sc_rbs_base;/* NULL or new base of sighandler's rbs */
      62    unsigned long int sc_loadrs;	/* see description above */
      63    unsigned long int sc_ar25;	/* cmp8xchg16 uses this */
      64    unsigned long int sc_ar26;	/* rsvd for scratch use */
      65    unsigned long int sc_rsvd[12];/* reserved for future use */
      66  
      67    /* sc_mask is actually an sigset_t but we don't want to
      68     * include the kernel headers here. */
      69    unsigned long int sc_mask;	/* signal mask to restore after handler returns */
      70  };
      71  
      72  /* sc_flag bit definitions. */
      73  #define IA64_SC_FLAG_ONSTACK_BIT	0	/* is handler running on signal stack? */
      74  #define IA64_SC_FLAG_IN_SYSCALL_BIT	1	/* did signal interrupt a syscall? */
      75  #define IA64_SC_FLAG_FPH_VALID_BIT	2	/* is state in f[32]-f[127] valid? */
      76  
      77  #define IA64_SC_FLAG_ONSTACK		(1 << IA64_SC_FLAG_ONSTACK_BIT)
      78  #define IA64_SC_FLAG_IN_SYSCALL		(1 << IA64_SC_FLAG_IN_SYSCALL_BIT)
      79  #define IA64_SC_FLAG_FPH_VALID		(1 << IA64_SC_FLAG_FPH_VALID_BIT)
      80  
      81  #endif /* _BITS_SIGCONTEXT_H */