qemu/scripts/feature_to_c.py
Akihiko Odaki eb37086fb0 gdbstub: Add members to identify registers to GDBFeature
These members will be used to help plugins to identify registers.
The added members in instances of GDBFeature dynamically generated by
CPUs will be filled in later changes.

Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Message-Id: <20231213-gdb-v17-10-777047380591@daynix.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20240227144335.1196131-15-alex.bennee@linaro.org>
2024-02-28 09:10:11 +00:00

103 lines
3.0 KiB
Python

#!/usr/bin/env python3
# SPDX-License-Identifier: GPL-2.0-or-later
import os, sys, xml.etree.ElementTree
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()
parser = xml.etree.ElementTree.XMLPullParser(['start', 'end'])
parser.feed(read)
events = parser.read_events()
event, element = next(events)
if event != 'start':
sys.stderr.write(f'unexpected event: {event}\n')
exit(1)
if element.tag != 'feature':
sys.stderr.write(f'unexpected start tag: {element.tag}\n')
exit(1)
feature_name = element.attrib['name']
regnum = 0
regnames = []
regnums = []
tags = ['feature']
for event, element in events:
if event == 'end':
if element.tag != tags[len(tags) - 1]:
sys.stderr.write(f'unexpected end tag: {element.tag}\n')
exit(1)
tags.pop()
if element.tag == 'feature':
break
elif event == 'start':
if len(tags) < 2 and element.tag == 'reg':
if 'regnum' in element.attrib:
regnum = int(element.attrib['regnum'])
regnames.append(element.attrib['name'])
regnums.append(regnum)
regnum += 1
tags.append(element.tag)
else:
raise Exception(f'unexpected event: {event}\n')
if len(tags):
sys.stderr.write('unterminated feature tag\n')
exit(1)
base_reg = min(regnums)
num_regs = max(regnums) - base_reg + 1 if len(regnums) else 0
sys.stdout.write(' {\n')
writeliteral(8, bytes(os.path.basename(input), 'utf-8'))
sys.stdout.write(',\n')
writeliteral(8, read)
sys.stdout.write(',\n')
writeliteral(8, bytes(feature_name, 'utf-8'))
sys.stdout.write(',\n (const char * const []) {\n')
for index, regname in enumerate(regnames):
sys.stdout.write(f' [{regnums[index] - base_reg}] =\n')
writeliteral(16, bytes(regname, 'utf-8'))
sys.stdout.write(',\n')
sys.stdout.write(f' }},\n {num_regs},\n }},\n')
sys.stdout.write(' { NULL }\n};\n')