xref: /qemu/scripts/feature_to_c.py (revision ec6f3fc3) 
1#!/usr/bin/env python3
2# SPDX-License-Identifier: GPL-2.0-or-later
3
4import os, sys, xml.etree.ElementTree
5
6def writeliteral(indent, bytes):
7    sys.stdout.write(' ' * indent)
8    sys.stdout.write('"')
9    quoted = True
10
11    for c in bytes:
12        if not quoted:
13            sys.stdout.write('\n')
14            sys.stdout.write(' ' * indent)
15            sys.stdout.write('"')
16            quoted = True
17
18        if c == b'"'[0]:
19            sys.stdout.write('\\"')
20        elif c == b'\\'[0]:
21            sys.stdout.write('\\\\')
22        elif c == b'\n'[0]:
23            sys.stdout.write('\\n"')
24            quoted = False
25        elif c >= 32 and c < 127:
26            sys.stdout.write(c.to_bytes(1, 'big').decode())
27        else:
28            sys.stdout.write(f'\{c:03o}')
29
30    if quoted:
31        sys.stdout.write('"')
32
33sys.stdout.write('#include "qemu/osdep.h"\n' \
34                 '#include "exec/gdbstub.h"\n' \
35                 '\n'
36                 'const GDBFeature gdb_static_features[] = {\n')
37
38for input in sys.argv[1:]:
39    with open(input, 'rb') as file:
40        read = file.read()
41
42    parser = xml.etree.ElementTree.XMLPullParser(['start', 'end'])
43    parser.feed(read)
44    events = parser.read_events()
45    event, element = next(events)
46    if event != 'start':
47        sys.stderr.write(f'unexpected event: {event}\n')
48        exit(1)
49    if element.tag != 'feature':
50        sys.stderr.write(f'unexpected start tag: {element.tag}\n')
51        exit(1)
52
53    regnum = 0
54    regnums = []
55    tags = ['feature']
56    for event, element in events:
57        if event == 'end':
58            if element.tag != tags[len(tags) - 1]:
59                sys.stderr.write(f'unexpected end tag: {element.tag}\n')
60                exit(1)
61
62            tags.pop()
63            if element.tag == 'feature':
64                break
65        elif event == 'start':
66            if len(tags) < 2 and element.tag == 'reg':
67                if 'regnum' in element.attrib:
68                    regnum = int(element.attrib['regnum'])
69
70                regnums.append(regnum)
71                regnum += 1
72
73            tags.append(element.tag)
74        else:
75            raise Exception(f'unexpected event: {event}\n')
76
77    if len(tags):
78        sys.stderr.write('unterminated feature tag\n')
79        exit(1)
80
81    base_reg = min(regnums)
82    num_regs = max(regnums) - base_reg + 1 if len(regnums) else 0
83
84    sys.stdout.write('    {\n')
85    writeliteral(8, bytes(os.path.basename(input), 'utf-8'))
86    sys.stdout.write(',\n')
87    writeliteral(8, read)
88    sys.stdout.write(f',\n        {num_regs},\n    }},\n')
89
90sys.stdout.write('    { NULL }\n};\n')
91