| |
| # Generates the makefile "sysd-rules" given a list of sysdeps |
| # subdirectories (the sysdirs search path). For every basename that |
| # appears in the search path, e.g. "vfork", it picks the source file |
| # that appears first, e.g. "sysdeps/unix/sysv/linux/i386/vfork.S". |
| |
| # TODO(mseaborn): Handle check-inhibit-asm |
| # TODO(mseaborn): Handle rule for installing .h files |
| |
| import os |
| import sys |
| |
| |
| source_suffixes = (".c", ".S", ".s") |
| |
| |
| def parse_syscalls_list(path): |
| for line in open(path, "r"): |
| if not line.startswith("#") and line.strip() != "": |
| yield line.split() |
| |
| |
| # This is a list of sources files that take priority over files found |
| # via the sysdeps search path. This allows us, for example, to ignore |
| # sysdeps/i386/memcmp.S without overriding |
| # sysdeps/i386/dl-trampoline.S. |
| # TODO(mseaborn): Make this mechanism less NaCl-specific by moving |
| # this list to a file that is found via the search path. |
| override_list = [ |
| "debug/memcpy_chk.c", |
| "debug/strcpy_chk.c", |
| "debug/stpcpy_chk.c", |
| "dirent/alphasort.c", |
| "dirent/scandir.c", |
| "dirent/versionsort.c", |
| "inet/htonl.c", |
| "inet/htons.c", |
| "io/ftw.c", |
| "io/lockf.c", |
| "io/posix_fadvise.c", |
| "libio/fseeko.c", |
| "libio/ftello.c", |
| "libio/iofgetpos.c", |
| "libio/iofopen.c", |
| "libio/iofsetpos.c", |
| "math/e_acosl.c", |
| "math/e_atan2l.c", |
| "math/e_expl.c", |
| "math/e_sqrtl.c", |
| "math/s_atanl.c", |
| "math/s_cexp.c", |
| "math/s_cexpl.c", |
| "math/s_fmax.c", |
| "math/s_fmaxf.c", |
| "math/s_fmin.c", |
| "math/s_fminf.c", |
| "math/s_significandl.c", |
| "misc/mkostemp.c", |
| "misc/mkstemp.c", |
| "misc/syscall.c", |
| "nptl/pthread_barrier_wait.c", |
| "nptl/pthread_cond_broadcast.c", |
| "nptl/pthread_cond_signal.c", |
| "nptl/pthread_cond_timedwait.c", |
| "nptl/pthread_cond_wait.c", |
| "nptl/pthread_rwlock_rdlock.c", |
| "nptl/pthread_rwlock_timedrdlock.c", |
| "nptl/pthread_rwlock_timedwrlock.c", |
| "nptl/pthread_rwlock_unlock.c", |
| "nptl/pthread_rwlock_wrlock.c", |
| "nptl/pthread_spin_init.c", |
| "nptl/pthread_spin_lock.c", |
| "nptl/pthread_spin_trylock.c", |
| "nptl/pthread_spin_unlock.c", |
| "nptl/sysdeps/unix/sysv/linux/ia64/pthread_once.c", |
| "nptl/sysdeps/unix/sysv/linux/libc-lowlevellock.c", |
| "nptl/sysdeps/unix/sysv/linux/lowlevellock.c", |
| "nptl/sysdeps/unix/sysv/linux/lowlevelrobustlock.c", |
| "nptl/sysdeps/unix/sysv/linux/sem_post.c", |
| "nptl/sysdeps/unix/sysv/linux/sem_timedwait.c", |
| "nptl/sysdeps/unix/sysv/linux/sem_trywait.c", |
| "nptl/sysdeps/unix/sysv/linux/sem_wait.c", |
| "posix/alarm.c", |
| "posix/getegid.c", |
| "posix/geteuid.c", |
| "posix/getgid.c", |
| "posix/getpid.c", |
| "posix/getuid.c", |
| "posix/glob.c", |
| "posix/pread.c", |
| "posix/pwrite.c", |
| "posix/vfork.c", |
| "posix/wait.c", |
| "posix/waitid.c", |
| "posix/waitpid.c", |
| "signal/sigaction.c", |
| "stdio-common/tmpfile.c", |
| "stdlib/add_n.c", |
| "stdlib/addmul_1.c", |
| "stdlib/getcontext.c", |
| "stdlib/lshift.c", |
| "stdlib/makecontext.c", |
| "stdlib/mul_1.c", |
| "stdlib/rshift.c", |
| "stdlib/setcontext.c", |
| "stdlib/sub_n.c", |
| "stdlib/submul_1.c", |
| "stdlib/swapcontext.c", |
| "string/bzero.c", |
| "string/memchr.c", |
| "string/memcmp.c", |
| "string/memcpy.c", |
| "string/mempcpy.c", |
| "string/memset.c", |
| "string/rawmemchr.c", |
| "string/stpcpy.c", |
| "string/stpncpy.c", |
| "string/strcat.c", |
| "string/strchr.c", |
| "string/strchrnul.c", |
| "string/strcmp.c", |
| "string/strcpy.c", |
| "string/strcspn.c", |
| "string/strlen.c", |
| "string/strpbrk.c", |
| "string/strrchr.c", |
| "string/strspn.c", |
| "string/strtok.c", |
| "string/strtok_r.c", |
| "sysdeps/generic/initfini.c", |
| "sysdeps/posix/writev.c", |
| "sysvipc/semtimedop.c", |
| "sysdeps/ieee754/dbl-64/e_atanh.c", |
| "sysdeps/ieee754/dbl-64/s_asinh.c", |
| "sysdeps/ieee754/dbl-64/s_copysign.c", |
| "sysdeps/ieee754/dbl-64/s_llrint.c", |
| "sysdeps/ieee754/dbl-64/s_lrint.c", |
| "sysdeps/ieee754/dbl-64/s_sincos.c", |
| "sysdeps/ieee754/flt-32/e_atanhf.c", |
| "sysdeps/ieee754/flt-32/s_asinhf.c", |
| "sysdeps/ieee754/flt-32/s_copysignf.c", |
| "sysdeps/ieee754/flt-32/s_llrintf.c", |
| "sysdeps/ieee754/flt-32/s_lrintf.c", |
| "sysdeps/ieee754/ldbl-96/e_atanhl.c", |
| "sysdeps/ieee754/ldbl-96/s_asinhl.c", |
| "sysdeps/ieee754/ldbl-96/s_logbl.c", |
| "sysdeps/ieee754/ldbl-96/s_rintl.c", |
| "sysdeps/nacl/umount.c", |
| "sysdeps/nacl/getpid.c", |
| "sysdeps/nacl/start.c", |
| "sysdeps/nacl/truncate.c", |
| "sysdeps/posix/libc_fatal.c", |
| "sysdeps/posix/posix_fallocate.c", |
| "sysdeps/posix/writev.c", |
| "sysdeps/unix/readdir_r.c", |
| "sysdeps/unix/sysv/linux/epoll_pwait.c", |
| "sysdeps/unix/sysv/linux/fstatvfs.c", |
| "sysdeps/unix/sysv/linux/getdirentries.c", |
| "sysdeps/unix/sysv/linux/openat.c", |
| "sysdeps/unix/sysv/linux/sched_getcpu.c", |
| "sysdeps/unix/sysv/linux/statvfs.c", |
| "sysdeps/unix/sysv/linux/sync_file_range.c", |
| "sysdeps/unix/time.c", |
| "sysvipc/semtimedop.c", |
| ] |
| |
| def get_override_map(): |
| override_map = {} |
| for filename in override_list: |
| assert filename[-2:] in source_suffixes, filename |
| assert os.path.exists(filename), filename |
| override_map[os.path.basename(filename[:-2])] = filename |
| return override_map |
| |
| |
| class RuleGenerator(object): |
| |
| def __init__(self, sysdirs): |
| self.sysdirs = sysdirs |
| self.all_leafnames = set() |
| # Checking all_files is a little faster than os.path.exists(). |
| self.all_files = set() |
| self.autogen_syscalls = set() |
| self.override_map = get_override_map() |
| |
| def scan_sysdirs(self): |
| for subdir in self.sysdirs: |
| for leafname in os.listdir(subdir): |
| pathname = os.path.join(subdir, leafname) |
| self.all_files.add(pathname) |
| if leafname[-2:] in source_suffixes: |
| self.all_leafnames.add(leafname[:-2]) |
| elif leafname == "syscalls.list": |
| for fields in parse_syscalls_list(pathname): |
| # We don't need to look at the 2nd field. It |
| # does not override other files - it can only |
| # cause this entry to be overridden by others. |
| name = fields[0] |
| self.autogen_syscalls.add((subdir, name)) |
| |
| def find_matches(self, leafname): |
| if leafname in self.override_map: |
| yield False, self.override_map[leafname] |
| for subdir in self.sysdirs: |
| # A syscalls.list entry for "mkdir" (for example) overrides |
| # "mkdir.c" in the same directory. |
| if (subdir, leafname) in self.autogen_syscalls: |
| yield True, "SYSCALL:%s:%s" % (subdir, leafname) |
| for suffix in source_suffixes: |
| pathname = os.path.join(subdir, leafname + suffix) |
| if pathname in self.all_files: |
| yield False, pathname |
| |
| def put_leafname_rules(self, stream, leafname): |
| matches = list(self.find_matches(leafname)) |
| if len(matches) == 0: |
| raise Exception("No match for %s" % leafname) |
| matches_string = " ".join(desc for is_autogen, desc in matches) |
| stream.write("\n### %s: %s\n" % (leafname, matches_string)) |
| is_autogen, pathname = matches[0] |
| if is_autogen: |
| # We don't need to generate rules for this leafname: |
| # its rules are generated by sysdeps/unix/make-syscalls.sh. |
| return |
| |
| def put_lib_rules(leafname, flags): |
| for dest_suffix in (".o", ".os"): |
| args = {"pathname": pathname, |
| "src_suffix": pathname[-2:], |
| "dest_suffix": dest_suffix, |
| "leafname": leafname, |
| "flags": flags} |
| stream.write( |
| "$(objpfx)%(leafname)s%(dest_suffix)s: " |
| "$(..)%(pathname)s $(before-compile)\n" |
| #"\t@echo building %(leafname)s%(dest_suffix)s\n" |
| "\t$(compile-command%(src_suffix)s)%(flags)s\n" % args) |
| |
| # Object files for libpthread.so |
| put_lib_rules("ptw-" + leafname, " $(ptw-CPPFLAGS)") |
| # Object files for ld.so (dynamic linker) |
| put_lib_rules("rtld-" + leafname, " $(rtld-CPPFLAGS)") |
| if leafname.startswith("s_"): |
| # Object files for libm.so (maths) |
| put_lib_rules("m_" + leafname[2:], " $(m_CPPFLAGS)") |
| # Object files for libc.so/libc.a and other libraries |
| put_lib_rules(leafname, "") |
| |
| def put_override_warnings(self, stream): |
| for leafname in sorted(self.override_map.iterkeys()): |
| if leafname not in self.all_leafnames: |
| stream.write( |
| "\n### Warning: nothing to override for %s." % leafname) |
| |
| def put_rules(self, stream): |
| for leafname in sorted(self.all_leafnames): |
| self.put_leafname_rules(stream, leafname) |
| |
| |
| def main(args): |
| generator = RuleGenerator(args) |
| generator.scan_sysdirs() |
| generator.put_override_warnings(sys.stdout) |
| generator.put_rules(sys.stdout) |
| |
| |
| if __name__ == "__main__": |
| main(sys.argv[1:]) |
