sysdeps/unix/sysv/linux/sparc/sparc64/sigcontextinfo.h

   1 /* Copyright (C) 1999-2023 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 _SIGCONTEXTINFO_H
  19 #define _SIGCONTEXTINFO_H
  20
  21 #include <bits/types/siginfo_t.h>
  22
  23 /* The sparc64 kernel signal frame for SA_SIGINFO is defined as:
  24
  25    struct rt_signal_frame
  26    {
  27      struct sparc_stackf ss;
  28      siginfo_t info;
  29      struct pt_regs regs;
  30      __siginfo_fpu_t *fpu_save;
  31      stack_t stack;
  32      sigset_t mask;
  33      __siginfo_rwin_t *rwin_save;
  34    };
  35
  36    Unlike other architectures, sparc64 passe the siginfo_t INFO pointer
  37    as the third argument to a sa_sigaction handler with SA_SIGINFO enabled.  */
  38
  39 #ifndef STACK_BIAS
  40 #define STACK_BIAS 2047
  41 #endif
  42
  43 struct pt_regs
  44 {
  45   unsigned long int u_regs[16];
  46   unsigned long int tstate;
  47   unsigned long int tpc;
  48   unsigned long int tnpc;
  49   unsigned int y;
  50   unsigned int magic;
  51 };
  52
  53 static inline uintptr_t
  54 sigcontext_get_pc (const siginfo_t *ctx)
  55 {
  56   struct pt_regs *regs = (struct pt_regs*) ((siginfo_t *)(ctx) + 1);
  57   return regs->tpc;
  58 }
  59
  60 #endif