LXR qemu/linux-user/include/host/alpha/host-signal.h

   1/*
   2 * host-signal.h: signal info dependent on the host architecture
   3 *
   4 * Copyright (c) 2003-2005 Fabrice Bellard
   5 * Copyright (c) 2021 Linaro Limited
   6 *
   7 * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
   8 * See the COPYING file in the top-level directory.
   9 */
  10
  11#ifndef ALPHA_HOST_SIGNAL_H
  12#define ALPHA_HOST_SIGNAL_H
  13
  14/* The third argument to a SA_SIGINFO handler is ucontext_t. */
  15typedef ucontext_t host_sigcontext;
  16
  17static inline uintptr_t host_signal_pc(host_sigcontext *uc)
  18{
  19    return uc->uc_mcontext.sc_pc;
  20}
  21
  22static inline void host_signal_set_pc(host_sigcontext *uc, uintptr_t pc)
  23{
  24    uc->uc_mcontext.sc_pc = pc;
  25}
  26
  27static inline void *host_signal_mask(host_sigcontext *uc)
  28{
  29    return &uc->uc_sigmask;
  30}
  31
  32static inline bool host_signal_write(siginfo_t *info, host_sigcontext *uc)
  33{
  34    uint32_t *pc = (uint32_t *)host_signal_pc(uc);
  35    uint32_t insn = *pc;
  36
  37    /* XXX: need kernel patch to get write flag faster */
  38    switch (insn >> 26) {
  39    case 0x0d: /* stw */
  40    case 0x0e: /* stb */
  41    case 0x0f: /* stq_u */
  42    case 0x24: /* stf */
  43    case 0x25: /* stg */
  44    case 0x26: /* sts */
  45    case 0x27: /* stt */
  46    case 0x2c: /* stl */
  47    case 0x2d: /* stq */
  48    case 0x2e: /* stl_c */
  49    case 0x2f: /* stq_c */
  50        return true;
  51    }
  52    return false;
  53}
  54
  55#endif
  56