/* * Emulation of BSD signals * * Copyright (c) 2013 Stacey Son * * SPDX-License-Identifier: GPL-2.0-or-later */ #ifndef SIGNAL_COMMON_H #define SIGNAL_COMMON_H long do_rt_sigreturn(CPUArchState *env); abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp); long do_sigreturn(CPUArchState *env); void force_sig_fault(int sig, int code, abi_ulong addr); int host_to_target_signal(int sig); void process_pending_signals(CPUArchState *env); void queue_signal(CPUArchState *env, int sig, int si_type, target_siginfo_t *info); void signal_init(void); int target_to_host_signal(int sig); /* * Within QEMU the top 8 bits of si_code indicate which of the parts of the * union in target_siginfo is valid. This only applies between * host_to_target_siginfo_noswap() and tswap_siginfo(); it does not appear * either within host siginfo_t or in target_siginfo structures which we get * from the guest userspace program. Linux kenrels use this internally, but BSD * kernels don't do this, but its a useful abstraction. * * The linux-user version of this uses the top 16 bits, but FreeBSD's SI_USER * and other signal indepenent SI_ codes have bit 16 set, so we only use the top * byte instead. * * For FreeBSD, we have si_pid, si_uid, si_status, and si_addr always. Linux and * {Open,Net}BSD have a different approach (where their reason field is larger, * but whose siginfo has fewer fields always). */ #define QEMU_SI_NOINFO 0 /* nothing other than si_signo valid */ #define QEMU_SI_FAULT 1 /* _fault is valid in _reason */ #define QEMU_SI_TIMER 2 /* _timer is valid in _reason */ #define QEMU_SI_MESGQ 3 /* _mesgq is valid in _reason */ #define QEMU_SI_POLL 4 /* _poll is valid in _reason */ #define QEMU_SI_CAPSICUM 5 /* _capsicum is valid in _reason */ #endif