1 files changed, 43 insertions, 23 deletions

diff --git a/bsd-user/qemu.h b/bsd-user/qemu.h
index 1b3b974afe..02921ac8b3 100644
--- a/bsd-user/qemu.h
+++ b/bsd-user/qemu.h
@@ -70,17 +70,9 @@ struct image_info {
     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;
 };
 
 /*
@@ -93,15 +85,39 @@ typedef struct TaskState {
     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;
 
@@ -201,16 +217,18 @@ print_openbsd_syscall(int num,
                       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,
@@ -451,4 +469,6 @@ static inline void *lock_user_string(abi_ulong guest_addr)
 
 #include <pthread.h>
 
+#include "user/safe-syscall.h"
+
 #endif /* QEMU_H */