From 2b82007571dbe02b85338dc9fa85251cd5d68028 Mon Sep 17 00:00:00 2001
From: Michael Brown
Date: Wed, 4 Sep 2024 13:29:30 +0100
Subject: [gdb] Allow CPU architectures to omit support for GDB

Move the <gdbmach.h> file to <bits/gdbmach.h>, and provide a common
dummy implementation for all architectures that have not yet
implemented support for GDB.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
---
 src/include/bits/gdbmach.h | 45 +++++++++++++++++++++++++++++++++++++++++++++
 src/include/ipxe/gdbstub.h |  2 +-
 2 files changed, 46 insertions(+), 1 deletion(-)
 create mode 100644 src/include/bits/gdbmach.h

(limited to 'src/include')

diff --git a/src/include/bits/gdbmach.h b/src/include/bits/gdbmach.h
new file mode 100644
index 000000000..7e349856f
--- /dev/null
+++ b/src/include/bits/gdbmach.h
@@ -0,0 +1,45 @@
+#ifndef _BITS_GDBMACH_H
+#define _BITS_GDBMACH_H
+
+/** @file
+ *
+ * Dummy GDB architecture specifics
+ *
+ * This file is included only if the architecture does not provide its
+ * own version of this file.
+ *
+ */
+
+#include <stdint.h>
+
+typedef unsigned long gdbreg_t;
+
+/* Register snapshot */
+enum {
+	/* Not yet implemented */
+	GDBMACH_NREGS,
+};
+
+#define GDBMACH_SIZEOF_REGS ( GDBMACH_NREGS * sizeof ( gdbreg_t ) )
+
+static inline void gdbmach_set_pc ( gdbreg_t *regs, gdbreg_t pc ) {
+	/* Not yet implemented */
+	( void ) regs;
+	( void ) pc;
+}
+
+static inline void gdbmach_set_single_step ( gdbreg_t *regs, int step ) {
+	/* Not yet implemented */
+	( void ) regs;
+	( void ) step;
+}
+
+static inline void gdbmach_breakpoint ( void ) {
+	/* Not yet implemented */
+}
+
+extern int gdbmach_set_breakpoint ( int type, unsigned long addr, size_t len,
+				    int enable );
+extern void gdbmach_init ( void );
+
+#endif /* _BITS_GDBMACH_H */
diff --git a/src/include/ipxe/gdbstub.h b/src/include/ipxe/gdbstub.h
index 13ca33ddb..2240cca42 100644
--- a/src/include/ipxe/gdbstub.h
+++ b/src/include/ipxe/gdbstub.h
@@ -11,7 +11,7 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <stdint.h>
 #include <ipxe/tables.h>
-#include <gdbmach.h>
+#include <bits/gdbmach.h>
 
 /**
  * A transport mechanism for the GDB protocol
-- 
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