LXR qemu/linux-user/include/host/mips/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 MIPS_HOST_SIGNAL_H
  12#define MIPS_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.pc;
  20}
  21
  22static inline void host_signal_set_pc(host_sigcontext *uc, uintptr_t pc)
  23{
  24    uc->uc_mcontext.pc = pc;
  25}
  26
  27static inline void *host_signal_mask(host_sigcontext *uc)
  28{
  29    return &uc->uc_sigmask;
  30}
  31
  32#if defined(__misp16) || defined(__mips_micromips)
  33#error "Unsupported encoding"
  34#endif
  35
  36static inline bool host_signal_write(siginfo_t *info, host_sigcontext *uc)
  37{
  38    uint32_t insn = *(uint32_t *)host_signal_pc(uc);
  39
  40    /* Detect all store instructions at program counter. */
  41    switch ((insn >> 26) & 077) {
  42    case 050: /* SB */
  43    case 051: /* SH */
  44    case 052: /* SWL */
  45    case 053: /* SW */
  46    case 054: /* SDL */
  47    case 055: /* SDR */
  48    case 056: /* SWR */
  49    case 070: /* SC */
  50    case 071: /* SWC1 */
  51    case 074: /* SCD */
  52    case 075: /* SDC1 */
  53    case 077: /* SD */
  54#if !defined(__mips_isa_rev) || __mips_isa_rev < 6
  55    case 072: /* SWC2 */
  56    case 076: /* SDC2 */
  57#endif
  58        return true;
  59    case 023: /* COP1X */
  60        /*
  61         * Required in all versions of MIPS64 since
  62         * MIPS64r1 and subsequent versions of MIPS32r2.
  63         */
  64        switch (insn & 077) {
  65        case 010: /* SWXC1 */
  66        case 011: /* SDXC1 */
  67        case 015: /* SUXC1 */
  68            return true;
  69        }
  70        break;
  71    }
  72    return false;
  73}
  74
  75#endif
  76