public inbox for glibc-cvs@sourceware.org
help / color / mirror / Atom feed
* [glibc] Linux: Enhance glibcsyscalls.py to support listing system calls
@ 2020-05-11 20:23 Florian Weimer
0 siblings, 0 replies; only message in thread
From: Florian Weimer @ 2020-05-11 20:23 UTC (permalink / raw)
To: glibc-cvs
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=6fcb0272f76721a45e33061404120907e8c5dae4
commit 6fcb0272f76721a45e33061404120907e8c5dae4
Author: Florian Weimer <fweimer@redhat.com>
Date: Mon May 11 22:23:34 2020 +0200
Linux: Enhance glibcsyscalls.py to support listing system calls
The script can now be called to query the definition status of
system call numbers across all architectures, like this:
$ python3 sysdeps/unix/sysv/linux/glibcsyscalls.py query-syscall sync_file_range sync_file_range2
sync_file_range:
defined: aarch64 alpha csky hppa i386 ia64 m68k microblaze mips/mips32 mips/mips64/n32 mips/mips64/n64 nios2 riscv/rv64 s390/s390-32 s390/s390-64 sh sparc/sparc32 sparc/sparc64 x86_64/64 x86_64/x32
undefined: arm powerpc/powerpc32 powerpc/powerpc64
sync_file_range2:
defined: arm powerpc/powerpc32 powerpc/powerpc64
undefined: aarch64 alpha csky hppa i386 ia64 m68k microblaze mips/mips32 mips/mips64/n32 mips/mips64/n64 nios2 riscv/rv64 s390/s390-32 s390/s390-64 sh sparc/sparc32 sparc/sparc64 x86_64/64 x86_64/x32
This command lists the headers containing the system call numbers:
$ python3 sysdeps/unix/sysv/linux/glibcsyscalls.py list-headers
The argument parser code is based on a suggestion from Adhemerval Zanella.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Diff:
---
sysdeps/unix/sysv/linux/glibcsyscalls.py | 84 +++++++++++++++++++++++++++++++-
1 file changed, 83 insertions(+), 1 deletion(-)
diff --git a/sysdeps/unix/sysv/linux/glibcsyscalls.py b/sysdeps/unix/sysv/linux/glibcsyscalls.py
index de4d707e48..8d45cd4333 100644
--- a/sysdeps/unix/sysv/linux/glibcsyscalls.py
+++ b/sysdeps/unix/sysv/linux/glibcsyscalls.py
@@ -17,9 +17,12 @@
# License along with the GNU C Library; if not, see
# <http://www.gnu.org/licenses/>.
+import os
import re
-import glibcextract
+if __name__ != '__main__':
+ # When called as a main program, this is not needed.
+ import glibcextract
def extract_system_call_name(macro):
"""Convert the macro name (with __NR_) to a system call name."""
@@ -168,3 +171,82 @@ def linux_kernel_version(cc):
val = glibcextract.compute_c_consts(sym_data, cc)['LINUX_VERSION_CODE']
val = int(val)
return ((val & 0xff0000) >> 16, (val & 0xff00) >> 8)
+
+class ArchSyscall:
+ """Canonical name and location of a syscall header."""
+
+ def __init__(self, name, path):
+ self.name = name
+ self.path = path
+
+ def __repr__(self):
+ return 'ArchSyscall(name={!r}, patch={!r})'.format(
+ self.name, self.path)
+
+def list_arch_syscall_headers(topdir):
+ """A generator which returns all the ArchSyscall objects in a tree."""
+
+ sysdeps = os.path.join(topdir, 'sysdeps', 'unix', 'sysv', 'linux')
+ for root, dirs, files in os.walk(sysdeps):
+ if root != sysdeps:
+ for filename in files:
+ if filename == 'arch-syscall.h':
+ yield ArchSyscall(
+ name=os.path.relpath(root, sysdeps),
+ path=os.path.join(root, filename))
+
+def __main():
+ """Entry point when called as the main program."""
+
+ import argparse
+ import sys
+
+ # Top-level directory of the source tree.
+ topdir = os.path.realpath(os.path.join(
+ os.path.dirname(os.path.realpath(__file__)), *('..',) * 4))
+
+ def get_parser():
+ parser = argparse.ArgumentParser(description=__doc__)
+ subparsers = parser.add_subparsers(dest='command', required=True)
+ subparsers.add_parser('list-headers',
+ help='Print the absolute paths of all arch-syscall.h header files')
+ subparser = subparsers.add_parser('query-syscall',
+ help='Summarize the implementation status of system calls')
+ subparser.add_argument('syscalls', help='Which syscalls to check',
+ nargs='+')
+ return parser
+ parser = get_parser()
+ args = parser.parse_args()
+
+ if args.command == 'list-headers':
+ for header in sorted([syscall.path for syscall
+ in list_arch_syscall_headers(topdir)]):
+ print(header)
+
+ elif args.command == 'query-syscall':
+ # List of system call tables.
+ tables = sorted(list_arch_syscall_headers(topdir),
+ key=lambda syscall: syscall.name)
+ for table in tables:
+ table.numbers = load_arch_syscall_header(table.path)
+
+ for nr in args.syscalls:
+ defined = [table.name for table in tables
+ if nr in table.numbers]
+ undefined = [table.name for table in tables
+ if nr not in table.numbers]
+ if not defined:
+ print('{}: not defined on any architecture'.format(nr))
+ elif not undefined:
+ print('{}: defined on all architectures'.format(nr))
+ else:
+ print('{}:'.format(nr))
+ print(' defined: {}'.format(' '.join(defined)))
+ print(' undefined: {}'.format(' '.join(undefined)))
+
+ else:
+ # Unrecognized command.
+ usage(1)
+
+if __name__ == '__main__':
+ __main()
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2020-05-11 20:23 UTC | newest]
Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-05-11 20:23 [glibc] Linux: Enhance glibcsyscalls.py to support listing system calls Florian Weimer
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).