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authorWarner Losh <imp@bsdimp.com>2022-01-08 17:14:12 -0700
committerWarner Losh <imp@bsdimp.com>2022-01-28 15:52:39 -0700
commit6e0bc06e210cbd25006c3a39e9a8325784d0be78 (patch)
treeca1fede25cafd389420c61d5a3fa975c7a4c9077 /bsd-user
parente32a63010ff221f7e161a592972076d2976c5eae (diff)
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bsd-user/host/arm/host-signal.h: Implement host_signal_*
Implement host_signal_pc, host_signal_set_pc and host_signal_write for arm. Signed-off-by: Kyle Evans <kevans@freebsd.org> Signed-off-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to 'bsd-user')
-rw-r--r--bsd-user/host/arm/host-signal.h35
1 files changed, 35 insertions, 0 deletions
diff --git a/bsd-user/host/arm/host-signal.h b/bsd-user/host/arm/host-signal.h
new file mode 100644
index 0000000..56679bd
--- /dev/null
+++ b/bsd-user/host/arm/host-signal.h
@@ -0,0 +1,35 @@
+/*
+ * host-signal.h: signal info dependent on the host architecture
+ *
+ * Copyright (c) 2021 Warner Losh
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#ifndef ARM_HOST_SIGNAL_H
+#define ARM_HOST_SIGNAL_H
+
+#include <sys/ucontext.h>
+
+static inline uintptr_t host_signal_pc(ucontext_t *uc)
+{
+ return uc->uc_mcontext.__gregs[_REG_PC];
+}
+
+static inline void host_signal_set_pc(ucontext_t *uc, uintptr_t pc)
+{
+ uc->uc_mcontext.__gregs[_REG_PC] = pc;
+}
+
+static inline bool host_signal_write(siginfo_t *info, ucontext_t *uc)
+{
+ /*
+ * In the FSR, bit 11 is WnR. FreeBSD returns this as part of the
+ * si_info.si_trapno.
+ */
+ uint32_t fsr = info->si_trapno;
+
+ return extract32(fsr, 11, 1);
+}
+
+#endif