gdbstub: Introduce GDBFeature structure

Before this change, the information from a XML file was stored in an
array that is not descriptive. Introduce a dedicated structure type to
make it easier to understand and to extend with more fields.

Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230912224107.29669-6-akihiko.odaki@daynix.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20231009164104.369749-13-alex.bennee@linaro.org>

scripts/feature_to_c.py

@@ -0,0 +1,48 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+import os, sys
+
+def writeliteral(indent, bytes):
+    sys.stdout.write(' ' * indent)
+    sys.stdout.write('"')
+    quoted = True
+
+    for c in bytes:
+        if not quoted:
+            sys.stdout.write('\n')
+            sys.stdout.write(' ' * indent)
+            sys.stdout.write('"')
+            quoted = True
+
+        if c == b'"'[0]:
+            sys.stdout.write('\\"')
+        elif c == b'\\'[0]:
+            sys.stdout.write('\\\\')
+        elif c == b'\n'[0]:
+            sys.stdout.write('\\n"')
+            quoted = False
+        elif c >= 32 and c < 127:
+            sys.stdout.write(c.to_bytes(1, 'big').decode())
+        else:
+            sys.stdout.write(f'\{c:03o}')
+
+    if quoted:
+        sys.stdout.write('"')
+
+sys.stdout.write('#include "qemu/osdep.h"\n' \
+                 '#include "exec/gdbstub.h"\n' \
+                 '\n'
+                 'const GDBFeature gdb_static_features[] = {\n')
+
+for input in sys.argv[1:]:
+    with open(input, 'rb') as file:
+        read = file.read()
+
+    sys.stdout.write('    {\n')
+    writeliteral(8, bytes(os.path.basename(input), 'utf-8'))
+    sys.stdout.write(',\n')
+    writeliteral(8, read)
+    sys.stdout.write('\n    },\n')
+
+sys.stdout.write('    { NULL }\n};\n')