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

   1 /* Copyright (C) 1996-2024 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 */