Add a new user-only interface for updating cpu state before
raising a signal. This will take the place of do_unaligned_access
for user-only and should result in less boilerplate for each guest.
Signed-off-by: Richard Henderson <richard.hender...@linaro.org>
---
include/hw/core/tcg-cpu-ops.h | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/include/hw/core/tcg-cpu-ops.h b/include/hw/core/tcg-cpu-ops.h
index 8eadd404c8..e13898553a 100644
--- a/include/hw/core/tcg-cpu-ops.h
+++ b/include/hw/core/tcg-cpu-ops.h
@@ -135,6 +135,29 @@ struct TCGCPUOps {
void (*record_sigsegv)(CPUState *cpu, vaddr addr,
MMUAccessType access_type,
bool maperr, uintptr_t ra);
+ /**
+ * record_sigbus:
+ * @cpu: cpu context
+ * @addr: misaligned guest address
+ * @access_type: access was read/write/execute
+ * @ra: host pc for unwinding
+ *
+ * We are about to raise SIGBUS with si_code BUS_ADRALN,
+ * and si_addr set for @addr. Record anything further needed
+ * for the signal ucontext_t.
+ *
+ * If the emulated kernel does not provide the signal handler with
+ * anything besides the user context registers, and the siginfo_t,
+ * then this hook need do nothing and may be omitted.
+ * Otherwise, record the data and return; the caller will raise
+ * the signal, unwind the cpu state, and return to the main loop.
+ *
+ * If it is simpler to re-use the sysemu do_unaligned_access code,
+ * @ra is provided so that a "normal" cpu exception can be raised.
+ * In this case, the signal must be raised by the architecture cpu_loop.
+ */
+ void (*record_sigbus)(CPUState *cpu, vaddr addr,
+ MMUAccessType access_type, uintptr_t ra);
#endif /* CONFIG_SOFTMMU */
#endif /* NEED_CPU_H */
--
2.25.1
