sysdeps/unix/sysv/linux/ia64/bits/sigcontext.h

   1 /* Copyright (C) 1996-2019 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Jes Sorensen <jes@linuxcare.com>, July 2000
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #ifndef _BITS_SIGCONTEXT_H
  20 #define _BITS_SIGCONTEXT_H 1
  21
  22 #if !defined _SIGNAL_H && !defined _SYS_UCONTEXT_H
  23 # error "Never use <bits/sigcontext.h> directly; include <signal.h> instead."
  24 #endif
  25
  26 #define __need_size_t
  27 #include <stddef.h>
  28 #include <bits/sigstack.h>
  29 #include <bits/types/struct_sigstack.h>
  30 #include <bits/types/stack_t.h>
  31 #include <bits/ss_flags.h>
  32
  33 struct __ia64_fpreg
  34   {
  35     union
  36       {
  37         unsigned long bits[2];
  38       } u;
  39   } __attribute__ ((__aligned__ (16)));
  40
  41 struct sigcontext
  42 {
  43   unsigned long int sc_flags;   /* see manifest constants below */
  44   unsigned long int sc_nat;     /* bit i == 1 iff scratch reg gr[i] is a NaT */
  45   stack_t sc_stack;             /* previously active stack */
  46
  47   unsigned long int sc_ip;      /* instruction pointer */
  48   unsigned long int sc_cfm;     /* current frame marker */
  49   unsigned long int sc_um;      /* user mask bits */
  50   unsigned long int sc_ar_rsc;  /* register stack configuration register */
  51   unsigned long int sc_ar_bsp;  /* backing store pointer */
  52   unsigned long int sc_ar_rnat; /* RSE NaT collection register */
  53   unsigned long int sc_ar_ccv;  /* compare & exchange compare value register */
  54   unsigned long int sc_ar_unat; /* ar.unat of interrupted context */
  55   unsigned long int sc_ar_fpsr; /* floating-point status register */
  56   unsigned long int sc_ar_pfs;  /* previous function state */
  57   unsigned long int sc_ar_lc;   /* loop count register */
  58   unsigned long int sc_pr;      /* predicate registers */
  59   unsigned long int sc_br[8];   /* branch registers */
  60   unsigned long int sc_gr[32];  /* general registers (static partition) */
  61   struct __ia64_fpreg sc_fr[128];       /* floating-point registers */
  62   unsigned long int sc_rbs_base;/* NULL or new base of sighandler's rbs */
  63   unsigned long int sc_loadrs;  /* see description above */
  64   unsigned long int sc_ar25;    /* cmp8xchg16 uses this */
  65   unsigned long int sc_ar26;    /* rsvd for scratch use */
  66   unsigned long int sc_rsvd[12];/* reserved for future use */
  67
  68   /* sc_mask is actually an sigset_t but we don't want to
  69    * include the kernel headers here. */
  70   unsigned long int sc_mask;    /* signal mask to restore after handler returns */
  71 };
  72
  73 /* sc_flag bit definitions. */
  74 #define IA64_SC_FLAG_ONSTACK_BIT        0       /* is handler running on signal stack? */
  75 #define IA64_SC_FLAG_IN_SYSCALL_BIT     1       /* did signal interrupt a syscall? */
  76 #define IA64_SC_FLAG_FPH_VALID_BIT      2       /* is state in f[32]-f[127] valid? */
  77
  78 #define IA64_SC_FLAG_ONSTACK            (1 << IA64_SC_FLAG_ONSTACK_BIT)
  79 #define IA64_SC_FLAG_IN_SYSCALL         (1 << IA64_SC_FLAG_IN_SYSCALL_BIT)
  80 #define IA64_SC_FLAG_FPH_VALID          (1 << IA64_SC_FLAG_FPH_VALID_BIT)
  81
  82 #endif /* _BITS_SIGCONTEXT_H */