bsd-user: Implement procctl(2) along with necessary conversion functions.

[mirror_qemu.git] / bsd-user / signal-common.h

diff --git a/bsd-user/signal-common.h b/bsd-user/signal-common.h
index ee819266f549e3f513ad388c8a7c5f2bd905d085..77d7c7a78b7f72778630633bcbb5a785ce82703e 100644 (file)
--- a/bsd-user/signal-common.h
+++ b/bsd-user/signal-common.h
@@ -9,10 +9,33 @@
 #ifndef SIGNAL_COMMON_H
 #define SIGNAL_COMMON_H
 
+/**
+ * block_signals: block all signals while handling this guest syscall
+ *
+ * Block all signals, and arrange that the signal mask is returned to
+ * its correct value for the guest before we resume execution of guest code.
+ * If this function returns non-zero, then the caller should immediately
+ * return -TARGET_ERESTARTSYS to the main loop, which will take the pending
+ * signal and restart execution of the syscall.
+ * If block_signals() returns zero, then the caller can continue with
+ * emulation of the system call knowing that no signals can be taken
+ * (and therefore that no race conditions will result).
+ * This should only be called once, because if it is called a second time
+ * it will always return non-zero. (Think of it like a mutex that can't
+ * be recursively locked.)
+ * Signals will be unblocked again by process_pending_signals().
+ *
+ * Return value: non-zero if there was a pending signal, zero if not.
+ */
+int block_signals(void); /* Returns non zero if signal pending */
+
 long do_rt_sigreturn(CPUArchState *env);
+int do_sigaction(int sig, const struct target_sigaction *act,
+                struct target_sigaction *oact);
 abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp);
-long do_sigreturn(CPUArchState *env);
+long do_sigreturn(CPUArchState *env, abi_ulong addr);
 void force_sig_fault(int sig, int code, abi_ulong addr);
+void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info);
 int host_to_target_signal(int sig);
 void host_to_target_sigset(target_sigset_t *d, const sigset_t *s);
 void process_pending_signals(CPUArchState *env);
@@ -27,22 +50,27 @@ void target_to_host_sigset(sigset_t *d, const target_sigset_t *s);
  * 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
+ * from the guest userspace program. Linux kernels 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
+ * and other signal independent 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).
+ *
+ * QEMU_SI_CAPSICUM is currently only FreeBSD 14 current only, so only define
+ * it where _capsicum is available.
  */
 #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 */
+#if defined(__FreeBSD_version) && __FreeBSD_version >= 1400026
 #define QEMU_SI_CAPSICUM 5      /* _capsicum is valid in _reason */
+#endif
 
 #endif