linux-user: Add cpu_loop_exit_sigbus

This is a new interface to be provided by the os emulator for
raising SIGBUS on fault.  Use the new record_sigbus target hook.

Reviewed-by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

1 files changed, 14 insertions, 0 deletions

diff --git a/include/exec/exec-all.h b/include/exec/exec-all.h
index f74578500c..6bb2a0f7ec 100644
--- a/include/exec/exec-all.h
+++ b/include/exec/exec-all.h
@@ -700,6 +700,20 @@ void QEMU_NORETURN cpu_loop_exit_sigsegv(CPUState *cpu, target_ulong addr,
                                          MMUAccessType access_type,
                                          bool maperr, uintptr_t ra);
 
+/**
+ * cpu_loop_exit_sigbus:
+ * @cpu: the cpu context
+ * @addr: the guest address of the alignment fault
+ * @access_type: access was read/write/execute
+ * @ra: host pc for unwinding
+ *
+ * Use the TCGCPUOps hook to record cpu state, do guest operating system
+ * specific things to raise SIGBUS, and jump to the main cpu loop.
+ */
+void QEMU_NORETURN cpu_loop_exit_sigbus(CPUState *cpu, target_ulong addr,
+                                        MMUAccessType access_type,
+                                        uintptr_t ra);
+
 #else
 static inline void mmap_lock(void) {}
 static inline void mmap_unlock(void) {}