Initial commit

tools/gen_isr_header.py

@@ -0,0 +1,66 @@
+#!/usr/bin/env python3
+
+import subprocess
+import os
+import re
+import datetime
+
+def cpp_preprocess(input_path, cpp='cpp'):
+    return subprocess.check_output([cpp, '-P', input_path]).decode()
+
+def gen_isr_header(f, cpp='cpp'):
+    stripped_code = cpp_preprocess(args.input, args.use_cpp)
+
+    armed = False
+    for line in stripped_code.splitlines():
+        line = line.strip()
+
+        if armed:
+            if not line.startswith('.word'):
+                break
+
+            word, value = line.split()
+            assert word == '.word'
+            if value == '0':
+                yield None
+            else:
+                yield value
+
+        else:
+            if line.startswith('g_pfnVectors:'):
+                armed = True
+
+    else:
+        raise ValueError('Cannot find interrupt vector definition!')
+
+if __name__ == '__main__':
+    import argparse
+    parser = argparse.ArgumentParser()
+    parser.add_argument('--use-cpp', type=str, default=os.getenv('CPP', 'cpp'), help='cpp (C preprocessor) executable to use')
+    parser.add_argument('-g', '--generate-include-guards', action='store_true', help='Whether to generate include guards')
+    parser.add_argument('input', help='Input stm32****_startup.s file')
+    args = parser.parse_args()
+
+    print('/* AUTOGENERATED FILE! DO NOT MODIFY! */')
+    print('/* Generated {datetime.datetime.utcnow()} from {args.input} */')
+    if args.generate_include_guards:
+        include_guard_id = '__ISR_HEADER_' + re.sub('[^A-Za-z0-9]', '_', args.input.split('/')[-1]) + '__'
+        print(f'#ifndef {include_guard_id}')
+        print(f'#define {include_guard_id}')
+
+    print()
+    for i, handler_name in enumerate(gen_isr_header(args.input, args.use_cpp)):
+        if handler_name is None:
+            print(f'/* IRQ {i} is undefined for this part. */')
+        else:
+            print(f'void {handler_name}(void); {" " * (30-len(handler_name))} /* {i:> 3} */')
+    print()
+
+    print(f'#define NUM_IRQs {i+1}')
+    print('extern uint32_t g_pfnVectors[NUM_IRQs];')
+    print('#define isr_vector g_pfnVectors')
+    print()
+
+    if args.generate_include_guards:
+        print(f'#endif /* {include_guard_id} */')
+