extern char **environ;
-enum BSDType {
- target_freebsd,
- target_netbsd,
- target_openbsd,
-};
-extern enum BSDType bsd_type;
-
#include "exec/user/thunk.h"
#include "target_arch.h"
#include "syscall_defs.h"
uint32_t elf_flags;
};
-#define MAX_SIGQUEUE_SIZE 1024
-
-struct qemu_sigqueue {
- struct qemu_sigqueue *next;
- target_siginfo_t info;
-};
-
struct emulated_sigtable {
int pending; /* true if signal is pending */
- struct qemu_sigqueue *first;
- struct qemu_sigqueue info; /* Put first signal info here */
+ target_siginfo_t info;
};
/*
struct bsd_binprm *bprm;
struct image_info *info;
+ struct emulated_sigtable sync_signal;
+ /*
+ * TODO: Since we block all signals while returning to the main CPU
+ * loop, this needn't be an array
+ */
struct emulated_sigtable sigtab[TARGET_NSIG];
- struct qemu_sigqueue sigqueue_table[MAX_SIGQUEUE_SIZE]; /* siginfo queue */
- struct qemu_sigqueue *first_free; /* first free siginfo queue entry */
- int signal_pending; /* non zero if a signal may be pending */
-
- uint8_t stack[];
+ /*
+ * Nonzero if process_pending_signals() needs to do something (either
+ * handle a pending signal or unblock signals).
+ * This flag is written from a signal handler so should be accessed via
+ * the qatomic_read() and qatomic_set() functions. (It is not accessed
+ * from multiple threads.)
+ */
+ int signal_pending;
+ /* True if we're leaving a sigsuspend and sigsuspend_mask is valid. */
+ bool in_sigsuspend;
+ /*
+ * This thread's signal mask, as requested by the guest program.
+ * The actual signal mask of this thread may differ:
+ * + we don't let SIGSEGV and SIGBUS be blocked while running guest code
+ * + sometimes we block all signals to avoid races
+ */
+ sigset_t signal_mask;
+ /*
+ * The signal mask imposed by a guest sigsuspend syscall, if we are
+ * currently in the middle of such a syscall
+ */
+ sigset_t sigsuspend_mask;
+
+ /* This thread's sigaltstack, if it has one */
+ struct target_sigaltstack sigaltstack_used;
} __attribute__((aligned(16))) TaskState;
-void init_task_state(TaskState *ts);
void stop_all_tasks(void);
extern const char *qemu_uname_release;
abi_long arg1, abi_long arg2, abi_long arg3,
abi_long arg4, abi_long arg5, abi_long arg6);
void print_openbsd_syscall_ret(int num, abi_long ret);
+/**
+ * print_taken_signal:
+ * @target_signum: target signal being taken
+ * @tinfo: target_siginfo_t which will be passed to the guest for the signal
+ *
+ * Print strace output indicating that this signal is being taken by the guest,
+ * in a format similar to:
+ * --- SIGSEGV {si_signo=SIGSEGV, si_code=SI_KERNEL, si_addr=0} ---
+ */
+void print_taken_signal(int target_signum, const target_siginfo_t *tinfo);
extern int do_strace;
-/* signal.c */
-void process_pending_signals(CPUArchState *cpu_env);
-void signal_init(void);
-long do_sigreturn(CPUArchState *env);
-long do_rt_sigreturn(CPUArchState *env);
-void queue_signal(CPUArchState *env, int sig, target_siginfo_t *info);
-abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp);
-
/* mmap.c */
int target_mprotect(abi_ulong start, abi_ulong len, int prot);
abi_long target_mmap(abi_ulong start, abi_ulong len, int prot,
#include <pthread.h>
+#include "user/safe-syscall.h"
+
#endif /* QEMU_H */