Hello Kinsey,
why don't you use a fatal error extension for this? You can save all the
processor state to a structure and use it to jump to previous or next
instruction it if needed in a custom fatal error handler which deals
with RTEMS_FATAL_EXCEPTION. I think libdebugger uses this approach.
On 14/04/2021 17:46, Kinsey Moore wrote:
This adds a confdef option allowing an application to request mapping
machine exceptions to POSIX signals. This is required for some languages
such as Ada.
[...]
diff --git a/cpukit/include/rtems/exceptions.h
b/cpukit/include/rtems/exceptions.h
new file mode 100644
index 0000000000..5e43827d11
--- /dev/null
+++ b/cpukit/include/rtems/exceptions.h
@@ -0,0 +1,57 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+
+/**
+ * @file
+ *
+ * @brief Exception mapping
+ *
+ * This file describes the hooks necessary for mapping machine exceptions to
+ * POSIX signals.
+ */
+
+/*
+ * Copyright (C) 2021 On-Line Applications Research
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _RTEMS_EXCEPTIONS_H
+#define _RTEMS_EXCEPTIONS_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief Configures the desired mapping for machine exceptions to POSIX
+ * signals.
+ *
+ * See CONFIGURE_APPLICATION_NEEDS_EXCEPTION_TO_SIGNAL_MAPPING documentation
in the
+ * "RTEMS Classic API Guide".
+ */
+void _Exception_initialize_signal_mapping( void );
+
+#ifdef __cplusplus
+}
+#endif
The #include <rtems/*.h> location should be used for header files which
provide API elements. API elements should be in the rtems_* namespace.
--
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