Implement host_signal_pc, host_signal_set_pc and host_signal_write for
i386.
Signed-off-by: Kyle Evans <kev...@freebsd.org>
Signed-off-by: Warner Losh <i...@bsdimp.com>
Reviewed-by: Peter Maydell <peter.mayd...@linaro.org>
Reviewed-by: Richard Henderson <richard.hender...@linaro.org>
---
bsd-user/host/i386/host-signal.h | 37 ++++++++++++++++++++++++++++++++
1 file changed, 37 insertions(+)
create mode 100644 bsd-user/host/i386/host-signal.h
diff --git a/bsd-user/host/i386/host-signal.h b/bsd-user/host/i386/host-signal.h
new file mode 100644
index 00000000000..169e61b154c
--- /dev/null
+++ b/bsd-user/host/i386/host-signal.h
@@ -0,0 +1,37 @@
+/*
+ * host-signal.h: signal info dependent on the host architecture
+ *
+ * Copyright (c) 2021 Warner Losh
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#ifndef I386_HOST_SIGNAL_H
+#define I386_HOST_SIGNAL_H
+
+#include <sys/ucontext.h>
+#include <machine/trap.h>
+#include <vm/pmap.h>
+#include <machine/pmap.h>
+
+static inline uintptr_t host_signal_pc(ucontext_t *uc)
+{
+ return uc->uc_mcontext.mc_eip;
+}
+
+static inline void host_signal_set_pc(ucontext_t *uc, uintptr_t pc)
+{
+ uc->uc_mcontext.mc_eip = pc;
+}
+
+static inline bool host_signal_write(siginfo_t *info, ucontext_t *uc)
+{
+ /*
+ * Look in sys/i386/i386/trap.c. NOTE: mc_err == tr_err due to type punning
+ * between a trapframe and mcontext on FreeBSD/i386.
+ */
+ return uc->uc_mcontext.mc_trapno == T_PAGEFLT &&
+ uc->uc_mcontext.mc_err & PGEX_W;
+}
+
+#endif
--
2.33.1
