bsd-user/signal-common.h

   1 /*
   2  * Emulation of BSD signals
   3  *
   4  * Copyright (c) 2013 Stacey Son
   5  *
   6  * SPDX-License-Identifier: GPL-2.0-or-later
   7  */
   8
   9 #ifndef SIGNAL_COMMON_H
  10 #define SIGNAL_COMMON_H
  11
  12 long do_rt_sigreturn(CPUArchState *env);
  13 abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp);
  14 long do_sigreturn(CPUArchState *env, abi_ulong addr);
  15 void force_sig_fault(int sig, int code, abi_ulong addr);
  16 int host_to_target_signal(int sig);
  17 void host_to_target_sigset(target_sigset_t *d, const sigset_t *s);
  18 void process_pending_signals(CPUArchState *env);
  19 void queue_signal(CPUArchState *env, int sig, int si_type,
  20                   target_siginfo_t *info);
  21 void signal_init(void);
  22 int target_to_host_signal(int sig);
  23 void target_to_host_sigset(sigset_t *d, const target_sigset_t *s);
  24
  25 /*
  26  * Within QEMU the top 8 bits of si_code indicate which of the parts of the
  27  * union in target_siginfo is valid. This only applies between
  28  * host_to_target_siginfo_noswap() and tswap_siginfo(); it does not appear
  29  * either within host siginfo_t or in target_siginfo structures which we get
  30  * from the guest userspace program. Linux kenrels use this internally, but BSD
  31  * kernels don't do this, but its a useful abstraction.
  32  *
  33  * The linux-user version of this uses the top 16 bits, but FreeBSD's SI_USER
  34  * and other signal indepenent SI_ codes have bit 16 set, so we only use the top
  35  * byte instead.
  36  *
  37  * For FreeBSD, we have si_pid, si_uid, si_status, and si_addr always. Linux and
  38  * {Open,Net}BSD have a different approach (where their reason field is larger,
  39  * but whose siginfo has fewer fields always).
  40  */
  41 #define QEMU_SI_NOINFO   0      /* nothing other than si_signo valid */
  42 #define QEMU_SI_FAULT    1      /* _fault is valid in _reason */
  43 #define QEMU_SI_TIMER    2      /* _timer is valid in _reason */
  44 #define QEMU_SI_MESGQ    3      /* _mesgq is valid in _reason */
  45 #define QEMU_SI_POLL     4      /* _poll is valid in _reason */
  46 #define QEMU_SI_CAPSICUM 5      /* _capsicum is valid in _reason */
  47
  48 #endif