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744bafc3f2
GDBFeature::num_regs holds the number of registers, but when using the compound literal construction, if the last array entry is not set, the array will be shorter. Prevent array overrun by making the array length explicit, Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Akihiko Odaki <odaki@rsg.ci.i.u-tokyo.ac.jp> Message-Id: <20260216214332.47639-1-philmd@linaro.org>
106 lines
3.1 KiB
Python
106 lines
3.1 KiB
Python
#!/usr/bin/env python3
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# SPDX-License-Identifier: GPL-2.0-or-later
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import os, sys, xml.etree.ElementTree
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def writeliteral(indent, bytes):
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sys.stdout.write(' ' * indent)
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sys.stdout.write('"')
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quoted = True
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for c in bytes:
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if not quoted:
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sys.stdout.write('\n')
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sys.stdout.write(' ' * indent)
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sys.stdout.write('"')
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quoted = True
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if c == b'"'[0]:
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sys.stdout.write('\\"')
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elif c == b'\\'[0]:
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sys.stdout.write('\\\\')
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elif c == b'\n'[0]:
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sys.stdout.write('\\n"')
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quoted = False
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elif c >= 32 and c < 127:
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sys.stdout.write(c.to_bytes(1, 'big').decode())
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else:
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sys.stdout.write(f'\{c:03o}')
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if quoted:
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sys.stdout.write('"')
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sys.stdout.write('#include "qemu/osdep.h"\n' \
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'#include "exec/gdbstub.h"\n' \
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'\n'
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'const GDBFeature gdb_static_features[] = {\n')
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for input in sys.argv[1:]:
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with open(input, 'rb') as file:
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read = file.read()
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parser = xml.etree.ElementTree.XMLPullParser(['start', 'end'])
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parser.feed(read)
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events = parser.read_events()
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event, element = next(events)
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if event != 'start':
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sys.stderr.write(f'unexpected event: {event}\n')
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exit(1)
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if element.tag != 'feature':
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sys.stderr.write(f'unexpected start tag: {element.tag}\n')
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exit(1)
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feature_name = element.attrib['name']
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regnum = 0
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regnames = []
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regnums = []
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tags = ['feature']
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for event, element in events:
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if event == 'end':
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if element.tag != tags[len(tags) - 1]:
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sys.stderr.write(f'unexpected end tag: {element.tag}\n')
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exit(1)
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tags.pop()
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if element.tag == 'feature':
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break
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elif event == 'start':
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if len(tags) < 2 and element.tag == 'reg':
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if 'regnum' in element.attrib:
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regnum = int(element.attrib['regnum'])
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regnames.append(element.attrib['name'])
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regnums.append(regnum)
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regnum += 1
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tags.append(element.tag)
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else:
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raise Exception(f'unexpected event: {event}\n')
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if len(tags):
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sys.stderr.write('unterminated feature tag\n')
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exit(1)
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base_reg = min(regnums)
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num_regs = max(regnums) - base_reg + 1 if len(regnums) else 0
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sys.stdout.write(' {\n')
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writeliteral(8, bytes(os.path.basename(input), 'utf-8'))
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sys.stdout.write(',\n')
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writeliteral(8, read)
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sys.stdout.write(',\n')
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writeliteral(8, bytes(feature_name, 'utf-8'))
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sys.stdout.write(',\n')
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sys.stdout.write(f' (const char * const [{num_regs}]) {{\n')
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for index, regname in enumerate(regnames):
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sys.stdout.write(f' [{regnums[index] - base_reg}] =\n')
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writeliteral(16, bytes(regname, 'utf-8'))
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sys.stdout.write(',\n')
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sys.stdout.write( ' },\n')
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sys.stdout.write(f' {num_regs},\n')
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sys.stdout.write( ' },\n')
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sys.stdout.write(' { NULL }\n};\n')
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