bsd-user/signal.c: Implement cpu_loop_exit_sigsegv

First attempt at implementing cpu_loop_exit_sigsegv, mostly copied from
linux-user version of this function.

Signed-off-by: Stacey Son <sson@FreeBSD.org>
Signed-off-by: Kyle Evans <kevans@freebsd.org>
Signed-off-by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

diff --git a/bsd-user/signal.c b/bsd-user/signal.c
index 1206d0d728c613c2344058c67ab324e815977155..12de0e2dea41f78fe9373e611751293aadd7d0d0 100644 (file)
--- a/bsd-user/signal.c
+++ b/bsd-user/signal.c
@@ -20,6 +20,7 @@
 #include "qemu/osdep.h"
 #include "qemu.h"
 #include "signal-common.h"
+#include "hw/core/tcg-cpu-ops.h"
 
 /*
  * Stubbed out routines until we merge signal support from bsd-user
@@ -63,9 +64,17 @@ void process_pending_signals(CPUArchState *cpu_env)
 void cpu_loop_exit_sigsegv(CPUState *cpu, target_ulong addr,
                            MMUAccessType access_type, bool maperr, uintptr_t ra)
 {
-    qemu_log_mask(LOG_UNIMP, "No signal support for SIGSEGV\n");
-    /* unreachable */
-    abort();
+    const struct TCGCPUOps *tcg_ops = CPU_GET_CLASS(cpu)->tcg_ops;
+
+    if (tcg_ops->record_sigsegv) {
+        tcg_ops->record_sigsegv(cpu, addr, access_type, maperr, ra);
+    }
+
+    force_sig_fault(TARGET_SIGSEGV,
+                    maperr ? TARGET_SEGV_MAPERR : TARGET_SEGV_ACCERR,
+                    addr);
+    cpu->exception_index = EXCP_INTERRUPT;
+    cpu_loop_exit_restore(cpu, ra);
 }
 
 void cpu_loop_exit_sigbus(CPUState *cpu, target_ulong addr,