diff --git a/libc/SYSCALLS.TXT b/libc/SYSCALLS.TXT
index bf56ffe48..96cc9e6a9 100644
--- a/libc/SYSCALLS.TXT
+++ b/libc/SYSCALLS.TXT
@@ -1,13 +1,11 @@
-# this file is used to list all the syscalls that will be supported by
-# the Bionic C library. It is used to automatically generate the syscall
-# stubs, the list of syscall constants (__NR_xxxx) and the content of <linux/_unistd.h>
+# This file is used to automatically generate bionic's the system calls stubs.
 #
-# each non comment line has the following format:
+# Each non comment line has the following format:
 #
-# return_type    func_name[:syscall_name[:call_id]]([parameter_list])  (syscall_number|"stub")
+# return_type    func_name[:syscall_name[:call_id]]([parameter_list])  (1|-1|"stub")
 #
-# note that:
-#      - syscall_name correspond to the name of the syscall, which may differ from
+# Note that:
+#      - syscall_name corresponds to the name of the syscall, which may differ from
 #        the exported function name (example: the exit syscall is implemented by the _exit()
 #        function, which is not the same as the standard C exit() function which calls it)
 #        The call_id parameter, given that func_name and syscall_name have
@@ -18,302 +16,306 @@
 #      - each parameter type is assumed to be stored on 32 bits, there is no plan to support
 #        64-bit architectures at the moment
 #
-#      - it there is "stub" instead of a syscall number, the tool will not generate any
-#        assembler template for the syscall; it's up to the bionic implementation to provide
-#        a relevant C stub
+#      - the final field can be "1", meaning: generate a stub for each architecture,
+#        taking the constants from the kernel header files.
 #
-#      - additionally, if the syscall number is different amoung ARM, and x86, MIPS use:
-#        return_type funcname[:syscall_name](parameters) arm_number,x86_number,mips_number
+#      - the final field can be "stub" meaning: do not generate any stubs ---
+#        in this case, a hand-written custom stub must be provided.
+#        TODO: replace this with something like "custom" or "none", or remove
+#        it entirely.
+#
+#      - the final field can be a three-element list of 1s and -1 meaning:
+#        this system call is only available on some of the architectures (1),
+#        and no stub should be generated for those architectures marked with -1.
+#        the order is arm,x86,mips.
+#        TODO: replace this with something more readable like "-arm,-mips" (meaning x86 only).
 #
 # This file is processed by a python script named gensyscalls.py.
 #
-# The checksyscalls.py script can check that the syscall numbers here are
-# correct by comparing them to the numbers in the Linux kernel headers.
-#
 
 # process management
-void    _exit:exit_group (int)      248,252,246
+void    _exit:exit_group (int)      1
 void    _exit_thread:exit (int)     1
-pid_t   __fork:fork (void)           2
-pid_t   _waitpid:waitpid (pid_t, int*, int, struct rusage*)   -1,7,7
-int     __waitid:waitid(int, pid_t, struct siginfo_t*, int,void*)          280,284,278
-pid_t   wait4(pid_t pid, int *status, int options, struct rusage *rusage)   114
+pid_t   __fork:fork (void)           1
+pid_t   _waitpid:waitpid (pid_t, int*, int, struct rusage*)   -1,1,1
+int     __waitid:waitid(int, pid_t, struct siginfo_t*, int,void*)          1
+pid_t   wait4(pid_t pid, int *status, int options, struct rusage *rusage)   1
 
 # NOTE: this system call is never called directly, but we list it there
 #       to have __NR_clone properly defined.
 #
-pid_t   __sys_clone:clone (int, void*, int*, void*, int*) 120
+pid_t   __sys_clone:clone (int, void*, int*, void*, int*) 1
 
-int     execve (const char*, char* const*, char* const*)  11
+int     execve (const char*, char* const*, char* const*)  1
 
-int     __setuid:setuid32 (uid_t)    213,213,-1
-int     __setuid:setuid (uid_t)   -1,-1,23
-uid_t   getuid:getuid32 ()         199,199,-1
-uid_t   getuid:getuid ()           -1,-1,24
-gid_t   getgid:getgid32 ()         200,200,-1
-gid_t   getgid:getgid ()           -1,-1,47
-uid_t   geteuid:geteuid32 ()       201,201,-1
-uid_t   geteuid:geteuid ()         -1,-1,49
-gid_t   getegid:getegid32 ()       202,202,-1
-gid_t   getegid:getegid ()         -1,-1,50
-uid_t   getresuid:getresuid32 (uid_t *ruid, uid_t *euid, uid_t *suid)   209,209,-1
-uid_t   getresuid:getresuid (uid_t *ruid, uid_t *euid, uid_t *suid)     -1,-1,186
-gid_t   getresgid:getresgid32 (gid_t *rgid, gid_t *egid, gid_t *sgid)   211,211,-1
-gid_t   getresgid:getresgid (gid_t *rgid, gid_t *egid, gid_t *sgid)     -1,-1,191
-pid_t   gettid()                   224,224,222
-ssize_t readahead(int, off64_t, size_t)     225,225,223
-int     getgroups:getgroups32(int, gid_t *)    205,205,-1
-int     getgroups:getgroups(int, gid_t *)      -1,-1,80
-pid_t   getpgid(pid_t)             132
-pid_t   getppid()                  64
-pid_t   getsid(pid_t)              147,147,151
-pid_t   setsid()                   66
-int     setgid:setgid32(gid_t)     214,214,-1
-int     setgid:setgid(gid_t)       -1,-1,46
+int     __setuid:setuid32 (uid_t)    1,1,-1
+int     __setuid:setuid (uid_t)   -1,-1,1
+uid_t   getuid:getuid32 ()         1,1,-1
+uid_t   getuid:getuid ()           -1,-1,1
+gid_t   getgid:getgid32 ()         1,1,-1
+gid_t   getgid:getgid ()           -1,-1,1
+uid_t   geteuid:geteuid32 ()       1,1,-1
+uid_t   geteuid:geteuid ()         -1,-1,1
+gid_t   getegid:getegid32 ()       1,1,-1
+gid_t   getegid:getegid ()         -1,-1,1
+uid_t   getresuid:getresuid32 (uid_t *ruid, uid_t *euid, uid_t *suid)   1,1,-1
+uid_t   getresuid:getresuid (uid_t *ruid, uid_t *euid, uid_t *suid)     -1,-1,1
+gid_t   getresgid:getresgid32 (gid_t *rgid, gid_t *egid, gid_t *sgid)   1,1,-1
+gid_t   getresgid:getresgid (gid_t *rgid, gid_t *egid, gid_t *sgid)     -1,-1,1
+pid_t   gettid()                   1
+ssize_t readahead(int, off64_t, size_t)     1
+int     getgroups:getgroups32(int, gid_t *)    1,1,-1
+int     getgroups:getgroups(int, gid_t *)      -1,-1,1
+pid_t   getpgid(pid_t)             1
+pid_t   getppid()                  1
+pid_t   getsid(pid_t)              1
+pid_t   setsid()                   1
+int     setgid:setgid32(gid_t)     1,1,-1
+int     setgid:setgid(gid_t)       -1,-1,1
 int     seteuid:seteuid32(uid_t)   stub
-int     __setreuid:setreuid32(uid_t, uid_t)   203,203,-1
-int     __setreuid:setreuid(uid_t, uid_t)     -1,-1,70
-int     __setresuid:setresuid32(uid_t, uid_t, uid_t)   208,208,-1
-int     __setresuid:setresuid(uid_t, uid_t, uid_t)     -1,-1,185
-int     setresgid:setresgid32(gid_t, gid_t, gid_t)   210,210,-1
-int     setresgid:setresgid(gid_t, gid_t, gid_t)     -1,-1,190
-void*   __brk:brk(void*)           45
+int     __setreuid:setreuid32(uid_t, uid_t)   1,1,-1
+int     __setreuid:setreuid(uid_t, uid_t)     -1,-1,1
+int     __setresuid:setresuid32(uid_t, uid_t, uid_t)   1,1,-1
+int     __setresuid:setresuid(uid_t, uid_t, uid_t)     -1,-1,1
+int     setresgid:setresgid32(gid_t, gid_t, gid_t)   1,1,-1
+int     setresgid:setresgid(gid_t, gid_t, gid_t)     -1,-1,1
+void*   __brk:brk(void*)           1
 # see comments in arch-arm/bionic/kill.S to understand why we don't generate an ARM stub for kill/tkill
-int     kill(pid_t, int)           -1,37,37
-int     tkill(pid_t tid, int sig)  -1,238,236
-int     tgkill(pid_t tgid, pid_t tid, int sig)  -1,270,266
-int     __ptrace:ptrace(int request, int pid, void* addr, void* data)  26
-int     __set_thread_area:set_thread_area(void*  user_desc)  -1,243,283
-int     __getpriority:getpriority(int, int)  96
-int     setpriority(int, int, int)   97
-int     setrlimit(int resource, const struct rlimit *rlp)  75
-int     getrlimit:ugetrlimit(int resource, struct rlimit *rlp)  191,191,-1
-int     getrlimit:getrlimit(int resource, struct rlimit *rlp)  -1,-1,76
-int     getrusage(int who, struct rusage*  r_usage)  77
-int     setgroups:setgroups32(int, const gid_t *)   206,206,-1
-int     setgroups:setgroups(int, const gid_t *)     -1,-1,81
+int     kill(pid_t, int)           -1,1,1
+int     tkill(pid_t tid, int sig)  -1,1,1
+int     tgkill(pid_t tgid, pid_t tid, int sig)  -1,1,1
+int     __ptrace:ptrace(int request, int pid, void* addr, void* data)  1
+int     __set_thread_area:set_thread_area(void*  user_desc)  -1,1,1
+int     __getpriority:getpriority(int, int)  1
+int     setpriority(int, int, int)   1
+int     setrlimit(int resource, const struct rlimit *rlp)  1
+int     getrlimit:ugetrlimit(int resource, struct rlimit *rlp)  1,1,-1
+int     getrlimit:getrlimit(int resource, struct rlimit *rlp)  -1,-1,1
+int     getrusage(int who, struct rusage*  r_usage)  1
+int     setgroups:setgroups32(int, const gid_t *)   1,1,-1
+int     setgroups:setgroups(int, const gid_t *)     -1,-1,1
 pid_t   getpgrp(void)  stub
-int     setpgid(pid_t, pid_t)  57
-pid_t   vfork(void)  190,-1,-1
-int     setregid:setregid32(gid_t, gid_t)  204,204,-1
-int     setregid:setregid(gid_t, gid_t)    -1,-1,71
-int     chroot(const char *)  61
+int     setpgid(pid_t, pid_t)  1
+pid_t   vfork(void)  1,-1,-1
+int     setregid:setregid32(gid_t, gid_t)  1,1,-1
+int     setregid:setregid(gid_t, gid_t)    -1,-1,1
+int     chroot(const char *)  1
 # IMPORTANT: Even though <sys/prctl.h> declares prctl(int,...), the syscall stub must take 6 arguments
 #            to match the kernel implementation.
-int     prctl(int option, unsigned int arg2, unsigned int arg3, unsigned int arg4, unsigned int arg5)  172,172,192
-int     capget(cap_user_header_t header, cap_user_data_t data) 184,184,204
-int     capset(cap_user_header_t header, const cap_user_data_t data) 185,185,205
-int     sigaltstack(const stack_t*, stack_t*) 186,186,206
-int     acct(const char*  filepath)  51
+int     prctl(int option, unsigned int arg2, unsigned int arg3, unsigned int arg4, unsigned int arg5) 1
+int     capget(cap_user_header_t header, cap_user_data_t data) 1
+int     capset(cap_user_header_t header, const cap_user_data_t data) 1
+int     sigaltstack(const stack_t*, stack_t*) 1
+int     acct(const char*  filepath)  1
 
 # file descriptors
-ssize_t     read (int, void*, size_t)        3
-ssize_t     write (int, const void*, size_t)       4
-ssize_t     pread64 (int, void *, size_t, off64_t) 180,180,200
-ssize_t     pwrite64 (int, void *, size_t, off64_t) 181,181,201
-int         __open:open (const char*, int, mode_t)  5
-int         __openat:openat (int, const char*, int, mode_t)  322,295,288
-int         close (int)                      6
+ssize_t     read (int, void*, size_t)        1
+ssize_t     write (int, const void*, size_t)       1
+ssize_t     pread64 (int, void *, size_t, off64_t) 1
+ssize_t     pwrite64 (int, void *, size_t, off64_t) 1
+int         __open:open (const char*, int, mode_t)  1
+int         __openat:openat (int, const char*, int, mode_t) 1
+int         close (int)                      1
 int         creat(const char*, mode_t)       stub
-off_t       lseek(int, off_t, int)           19
-int         __llseek:_llseek (int, unsigned long, unsigned long, loff_t*, int)  140
-pid_t       getpid ()    20
+off_t       lseek(int, off_t, int)           1
+int         __llseek:_llseek (int, unsigned long, unsigned long, loff_t*, int)  1
+pid_t       getpid ()    1
 void *      mmap(void *, size_t, int, int, int, long)  stub
-void *      __mmap2:mmap2(void*, size_t, int, int, int, long)   192,192,210
-int         munmap(void *, size_t)  91
-void *      mremap(void *, size_t, size_t, unsigned long)  163,163,167
-int         msync(const void *, size_t, int)    144
-int         mprotect(const void *, size_t, int)  125
-int         madvise(const void *, size_t, int)  220,219,218
-int         mlock(const void *addr, size_t len)    150,150,154
-int         munlock(const void *addr, size_t len)   151,151,155
-int         mlockall(int flags)   152,152,156
-int         munlockall()   153,153,157
-int         mincore(void*  start, size_t  length, unsigned char*  vec)   219,218,217
-int         __ioctl:ioctl(int, int, void *)  54
-int         readv(int, const struct iovec *, int)   145
-int         writev(int, const struct iovec *, int)  146
-int         __fcntl:fcntl(int, int, void*)  55
-int         flock(int, int)   143
-int         fchmod(int, mode_t)  94
-int         dup(int)  41
-int         pipe(int *)  42,42,-1
-int         pipe2(int *, int) 359,331,328
-int         dup2(int, int)   63
-int         select:_newselect(int, struct fd_set *, struct fd_set *, struct fd_set *, struct timeval *)  142
-int         ftruncate(int, off_t)  93
-int         ftruncate64(int, off64_t) 194,194,212
-int         getdents:getdents64(unsigned int, struct dirent *, unsigned int)   217,220,219
-int         fsync(int)  118
-int         fdatasync(int) 148,148,152
-int         fchown:fchown32(int, uid_t, gid_t)  207,207,-1
-int         fchown:fchown(int, uid_t, gid_t)    -1,-1,95
-void        sync(void)  36
-int         __fcntl64:fcntl64(int, int, void *)  221,221,220
-int         __fstatfs64:fstatfs64(int, size_t, struct statfs *)  267,269,256
-ssize_t     sendfile(int out_fd, int in_fd, off_t *offset, size_t count)  187,187,207
-int         fstatat:fstatat64(int dirfd, const char *path, struct stat *buf, int flags)   327,300,293
-int         mkdirat(int dirfd, const char *pathname, mode_t mode)  323,296,289
-int         fchownat(int dirfd, const char *path, uid_t owner, gid_t group, int flags)  325,298,291
-int         fchmodat(int dirfd, const char *path, mode_t mode, int flags)  333,306,299
-int         renameat(int olddirfd, const char *oldpath, int newdirfd, const char *newpath)  329,302,295
-int         fsetxattr(int, const char *, const void *, size_t, int) 228,228,226
-ssize_t     fgetxattr(int, const char *, void *, size_t) 231,231,229
-ssize_t     flistxattr(int, char *, size_t) 234,234,232
-int         fremovexattr(int, const char *) 237,237,235
+void *      __mmap2:mmap2(void*, size_t, int, int, int, long)   1
+int         munmap(void *, size_t)  1
+void *      mremap(void *, size_t, size_t, unsigned long)  1
+int         msync(const void *, size_t, int)    1
+int         mprotect(const void *, size_t, int)  1
+int         madvise(const void *, size_t, int)  1
+int         mlock(const void *addr, size_t len)    1
+int         munlock(const void *addr, size_t len)   1
+int         mlockall(int flags)   1
+int         munlockall()   1
+int         mincore(void*  start, size_t  length, unsigned char*  vec)   1
+int         __ioctl:ioctl(int, int, void *)  1
+int         readv(int, const struct iovec *, int)   1
+int         writev(int, const struct iovec *, int)  1
+int         __fcntl:fcntl(int, int, void*)  1
+int         flock(int, int)   1
+int         fchmod(int, mode_t)  1
+int         dup(int)  1
+int         pipe(int *)  1,1,-1
+int         pipe2(int *, int) 1
+int         dup2(int, int)   1
+int         select:_newselect(int, struct fd_set *, struct fd_set *, struct fd_set *, struct timeval *)  1
+int         ftruncate(int, off_t)  1
+int         ftruncate64(int, off64_t) 1
+int         getdents:getdents64(unsigned int, struct dirent *, unsigned int)   1
+int         fsync(int)  1
+int         fdatasync(int) 1
+int         fchown:fchown32(int, uid_t, gid_t)  1,1,-1
+int         fchown:fchown(int, uid_t, gid_t)    -1,-1,1
+void        sync(void)  1
+int         __fcntl64:fcntl64(int, int, void *)  1
+int         __fstatfs64:fstatfs64(int, size_t, struct statfs *)  1
+ssize_t     sendfile(int out_fd, int in_fd, off_t *offset, size_t count)  1
+int         fstatat:fstatat64(int dirfd, const char *path, struct stat *buf, int flags)   1
+int         mkdirat(int dirfd, const char *pathname, mode_t mode)  1
+int         fchownat(int dirfd, const char *path, uid_t owner, gid_t group, int flags)  1
+int         fchmodat(int dirfd, const char *path, mode_t mode, int flags)  1
+int         renameat(int olddirfd, const char *oldpath, int newdirfd, const char *newpath)  1
+int         fsetxattr(int, const char *, const void *, size_t, int) 1
+ssize_t     fgetxattr(int, const char *, void *, size_t) 1
+ssize_t     flistxattr(int, char *, size_t) 1
+int         fremovexattr(int, const char *) 1
 
 # file system
-int     link (const char*, const char*)  9
-int     unlink (const char*)             10
-int     unlinkat (int, const char *, int)   328,301,294
-int     chdir (const char*)              12
-int     mknod (const char*, mode_t, dev_t)  14
-int     chmod (const char*,mode_t)          15
-int     chown:chown32(const char *, uid_t, gid_t)  212,212,-1
-int     chown:chown(const char *, uid_t, gid_t)    -1,-1,202
-int     lchown:lchown32 (const char*, uid_t, gid_t)  198,198,-1
-int     lchown:lchown (const char*, uid_t, gid_t)  -1,-1,16
-int     mount (const char*, const char*, const char*, unsigned long, const void*)  21
+int     link (const char*, const char*)  1
+int     unlink (const char*)             1
+int     unlinkat (int, const char *, int)   1
+int     chdir (const char*)              1
+int     mknod (const char*, mode_t, dev_t)  1
+int     chmod (const char*,mode_t)          1
+int     chown:chown32(const char *, uid_t, gid_t)  1,1,-1
+int     chown:chown(const char *, uid_t, gid_t)    -1,-1,1
+int     lchown:lchown32 (const char*, uid_t, gid_t)  1,1,-1
+int     lchown:lchown (const char*, uid_t, gid_t)  -1,-1,1
+int     mount (const char*, const char*, const char*, unsigned long, const void*)  1
 int     umount(const char*)  stub
-int     umount2 (const char*, int)  52
-int     fstat:fstat64(int, struct stat*)    197,197,215
-int     stat:stat64(const char *, struct stat *)  195,195,213
-int     lstat:lstat64(const char *, struct stat *)  196,196,214
-int     mkdir(const char *, mode_t) 39
-int     readlink(const char *, char *, size_t)  85
-int     rmdir(const char *)  40
-int     rename(const char *, const char *)  38
-int     __getcwd:getcwd(char * buf, size_t size)  183,183,203
-int     access(const char *, int)  33
-int     faccessat(int, const char *, int, int)  334,307,300
-int     symlink(const char *, const char *)  83
-int     fchdir(int)    133
-int     truncate(const char*, off_t)    92
-int     setxattr(const char *, const char *, const void *, size_t, int) 226,226,224
-int     lsetxattr(const char *, const char *, const void *, size_t, int) 227,227,225
-ssize_t getxattr(const char *, const char *, void *, size_t) 229,229,227
-ssize_t lgetxattr(const char *, const char *, void *, size_t) 230,230,228
-ssize_t listxattr(const char *, char *, size_t) 232,232,230
-ssize_t llistxattr(const char *, char *, size_t) 233,233,231
-int     removexattr(const char *, const char *) 235,235,233
-int     lremovexattr(const char *, const char *) 236,236,234
-int     __statfs64:statfs64(const char *, size_t, struct statfs *)  266,268,255
-long    unshare(unsigned long)  337,310,303
+int     umount2 (const char*, int)  1
+int     fstat:fstat64(int, struct stat*)    1
+int     stat:stat64(const char *, struct stat *)  1
+int     lstat:lstat64(const char *, struct stat *)  1
+int     mkdir(const char *, mode_t) 1
+int     readlink(const char *, char *, size_t)  1
+int     rmdir(const char *)  1
+int     rename(const char *, const char *)  1
+int     __getcwd:getcwd(char * buf, size_t size)  1
+int     access(const char *, int)  1
+int     faccessat(int, const char *, int, int)  1
+int     symlink(const char *, const char *)  1
+int     fchdir(int)    1
+int     truncate(const char*, off_t)    1
+int     setxattr(const char *, const char *, const void *, size_t, int) 1
+int     lsetxattr(const char *, const char *, const void *, size_t, int) 1
+ssize_t getxattr(const char *, const char *, void *, size_t) 1
+ssize_t lgetxattr(const char *, const char *, void *, size_t) 1
+ssize_t listxattr(const char *, char *, size_t) 1
+ssize_t llistxattr(const char *, char *, size_t) 1
+int     removexattr(const char *, const char *) 1
+int     lremovexattr(const char *, const char *) 1
+int     __statfs64:statfs64(const char *, size_t, struct statfs *)  1
+long    unshare(unsigned long)  1
 
 # time
-int           pause ()                       29
-int           gettimeofday(struct timeval*, struct timezone*)       78
-int           settimeofday(const struct timeval*, const struct timezone*)   79
-clock_t       times(struct tms *)       43
-int           nanosleep(const struct timespec *, struct timespec *)   162,162,166
-int           clock_gettime(clockid_t clk_id, struct timespec *tp)    263,265,263
-int           clock_settime(clockid_t clk_id, const struct timespec *tp)  262,264,262
-int           clock_getres(clockid_t clk_id, struct timespec *res)   264,266,264
-int           clock_nanosleep(clockid_t clock_id, int flags, const struct timespec *req, struct timespec *rem)  265,267,265
-int           getitimer(int, const struct itimerval *)   105
-int           setitimer(int, const struct itimerval *, struct itimerval *)  104
-int           __timer_create:timer_create(clockid_t clockid, struct sigevent *evp, timer_t *timerid)    257,259,257
-int           __timer_settime:timer_settime(timer_t, int, const struct itimerspec*, struct itimerspec*) 258,260,258
-int           __timer_gettime:timer_gettime(timer_t, struct itimerspec*)                                259,261,259
-int           __timer_getoverrun:timer_getoverrun(timer_t)                                              260,262,260
-int           __timer_delete:timer_delete(timer_t)                                                      261,263,261
-int           utimes(const char*, const struct timeval tvp[2])                          269,271,267
-int           utimensat(int, const char *, const struct timespec times[2], int)         348,320,316
+int           pause ()                       1
+int           gettimeofday(struct timeval*, struct timezone*)       1
+int           settimeofday(const struct timeval*, const struct timezone*)   1
+clock_t       times(struct tms *)       1
+int           nanosleep(const struct timespec *, struct timespec *)   1
+int           clock_gettime(clockid_t clk_id, struct timespec *tp)    1
+int           clock_settime(clockid_t clk_id, const struct timespec *tp)  1
+int           clock_getres(clockid_t clk_id, struct timespec *res)   1
+int           clock_nanosleep(clockid_t clock_id, int flags, const struct timespec *req, struct timespec *rem)  1
+int           getitimer(int, const struct itimerval *)   1
+int           setitimer(int, const struct itimerval *, struct itimerval *)  1
+int           __timer_create:timer_create(clockid_t clockid, struct sigevent *evp, timer_t *timerid)    1
+int           __timer_settime:timer_settime(timer_t, int, const struct itimerspec*, struct itimerspec*) 1
+int           __timer_gettime:timer_gettime(timer_t, struct itimerspec*)                                1
+int           __timer_getoverrun:timer_getoverrun(timer_t)                                              1
+int           __timer_delete:timer_delete(timer_t)                                                      1
+int           utimes(const char*, const struct timeval tvp[2])                          1
+int           utimensat(int, const char *, const struct timespec times[2], int)         1
 
 # signals
-int     sigaction(int, const struct sigaction *, struct sigaction *)  67
-int     sigprocmask(int, const sigset_t *, sigset_t *)  126
-int     __sigsuspend:sigsuspend(int unused1, int unused2, unsigned mask)  72,72,-1
-int     __sigsuspend:sigsuspend(const sigset_t *mask)  -1,-1,72
-int     __rt_sigaction:rt_sigaction (int sig, const struct sigaction *act, struct sigaction *oact, size_t sigsetsize)  174,174,194
-int     __rt_sigprocmask:rt_sigprocmask (int  how, const sigset_t *set, sigset_t *oset, size_t sigsetsize)  175,175,195
-int     __rt_sigtimedwait:rt_sigtimedwait(const sigset_t *set, struct siginfo_t  *info, struct timespec_t  *timeout, size_t  sigset_size)  177,177,197
-int     sigpending(sigset_t *)  73
-int     signalfd4(int fd, const sigset_t *mask, size_t sizemask, int flags)  355,327,324
+int     sigaction(int, const struct sigaction *, struct sigaction *)  1
+int     sigprocmask(int, const sigset_t *, sigset_t *)  1
+int     __sigsuspend:sigsuspend(int unused1, int unused2, unsigned mask)  1,1,-1
+int     __sigsuspend:sigsuspend(const sigset_t *mask)  -1,-1,1
+int     __rt_sigaction:rt_sigaction (int sig, const struct sigaction *act, struct sigaction *oact, size_t sigsetsize)  1
+int     __rt_sigprocmask:rt_sigprocmask (int  how, const sigset_t *set, sigset_t *oset, size_t sigsetsize)  1
+int     __rt_sigtimedwait:rt_sigtimedwait(const sigset_t *set, struct siginfo_t  *info, struct timespec_t  *timeout, size_t  sigset_size)  1
+int     sigpending(sigset_t *)  1
+int     signalfd4(int fd, const sigset_t *mask, size_t sizemask, int flags)  1
 
 # sockets
-int           socket(int, int, int)              281,-1,183
-int           socketpair(int, int, int, int*)    288,-1,184
-int           bind(int, struct sockaddr *, int)  282,-1,169
-int           connect(int, struct sockaddr *, socklen_t)   283,-1,170
-int           listen(int, int)                   284,-1,174
-int           accept(int, struct sockaddr *, socklen_t *)  285,-1,168
-int           getsockname(int, struct sockaddr *, socklen_t *)  286,-1,172
-int           getpeername(int, struct sockaddr *, socklen_t *)  287,-1,171
-int           sendto(int, const void *, size_t, int, const struct sockaddr *, socklen_t)  290,-1,180
-int           recvfrom(int, void *, size_t, unsigned int, struct sockaddr *, socklen_t *)  292,-1,176
-int           shutdown(int, int)  293,-1,182
-int           setsockopt(int, int, int, const void *, socklen_t)  294,-1,181
-int           getsockopt(int, int, int, void *, socklen_t *)    295,-1,173
-int           sendmsg(int, const struct msghdr *, unsigned int)  296,-1,179
-int           recvmsg(int, struct msghdr *, unsigned int)   297,-1,177
+int           socket(int, int, int)              1,-1,1
+int           socketpair(int, int, int, int*)    1,-1,1
+int           bind(int, struct sockaddr *, int)  1,-1,1
+int           connect(int, struct sockaddr *, socklen_t)   1,-1,1
+int           listen(int, int)                   1,-1,1
+int           accept(int, struct sockaddr *, socklen_t *)  1,-1,1
+int           getsockname(int, struct sockaddr *, socklen_t *)  1,-1,1
+int           getpeername(int, struct sockaddr *, socklen_t *)  1,-1,1
+int           sendto(int, const void *, size_t, int, const struct sockaddr *, socklen_t)  1,-1,1
+int           recvfrom(int, void *, size_t, unsigned int, struct sockaddr *, socklen_t *)  1,-1,1
+int           shutdown(int, int)  1,-1,1
+int           setsockopt(int, int, int, const void *, socklen_t)  1,-1,1
+int           getsockopt(int, int, int, void *, socklen_t *)    1,-1,1
+int           sendmsg(int, const struct msghdr *, unsigned int)  1,-1,1
+int           recvmsg(int, struct msghdr *, unsigned int)   1,-1,1
 
 # sockets for x86. These are done as an "indexed" call to socketcall syscall.
-int           socket:socketcall:1 (int, int, int) -1,102,-1
-int           bind:socketcall:2 (int, struct sockaddr *, int)  -1,102,-1
-int           connect:socketcall:3(int, struct sockaddr *, socklen_t)   -1,102,-1
-int           listen:socketcall:4(int, int)                   -1,102,-1
-int           accept:socketcall:5(int, struct sockaddr *, socklen_t *)  -1,102,-1
-int           getsockname:socketcall:6(int, struct sockaddr *, socklen_t *)  -1,102,-1
-int           getpeername:socketcall:7(int, struct sockaddr *, socklen_t *)  -1,102,-1
-int           socketpair:socketcall:8(int, int, int, int*)    -1,102,-1
-int           sendto:socketcall:11(int, const void *, size_t, int, const struct sockaddr *, socklen_t)  -1,102,-1
-int           recvfrom:socketcall:12(int, void *, size_t, unsigned int, struct sockaddr *, socklen_t *)  -1,102,-1
-int           shutdown:socketcall:13(int, int)  -1,102,-1
-int           setsockopt:socketcall:14(int, int, int, const void *, socklen_t)  -1,102,-1
-int           getsockopt:socketcall:15(int, int, int, void *, socklen_t *)    -1,102,-1
-int           sendmsg:socketcall:16(int, const struct msghdr *, unsigned int)  -1,102,-1
-int           recvmsg:socketcall:17(int, struct msghdr *, unsigned int)   -1,102,-1
+int           socket:socketcall:1 (int, int, int) -1,1,-1
+int           bind:socketcall:2 (int, struct sockaddr *, int)  -1,1,-1
+int           connect:socketcall:3(int, struct sockaddr *, socklen_t)   -1,1,-1
+int           listen:socketcall:4(int, int)                   -1,1,-1
+int           accept:socketcall:5(int, struct sockaddr *, socklen_t *)  -1,1,-1
+int           getsockname:socketcall:6(int, struct sockaddr *, socklen_t *)  -1,1,-1
+int           getpeername:socketcall:7(int, struct sockaddr *, socklen_t *)  -1,1,-1
+int           socketpair:socketcall:8(int, int, int, int*)    -1,1,-1
+int           sendto:socketcall:11(int, const void *, size_t, int, const struct sockaddr *, socklen_t)  -1,1,-1
+int           recvfrom:socketcall:12(int, void *, size_t, unsigned int, struct sockaddr *, socklen_t *)  -1,1,-1
+int           shutdown:socketcall:13(int, int)  -1,1,-1
+int           setsockopt:socketcall:14(int, int, int, const void *, socklen_t)  -1,1,-1
+int           getsockopt:socketcall:15(int, int, int, void *, socklen_t *)    -1,1,-1
+int           sendmsg:socketcall:16(int, const struct msghdr *, unsigned int)  -1,1,-1
+int           recvmsg:socketcall:17(int, struct msghdr *, unsigned int)   -1,1,-1
 
 # scheduler & real-time
-int sched_setscheduler(pid_t pid, int policy, const struct sched_param *param)  156,156,160
-int sched_getscheduler(pid_t pid)  157,157,161
-int sched_yield(void)  158,158,162
-int sched_setparam(pid_t pid, const struct sched_param *param)  154,154,158
-int sched_getparam(pid_t pid, struct sched_param *param)  155,155,159
-int sched_get_priority_max(int policy)  159,159,163
-int sched_get_priority_min(int policy)  160,160,164
-int sched_rr_get_interval(pid_t pid, struct timespec *interval)  161,161,165
-int sched_setaffinity(pid_t pid, size_t setsize, const cpu_set_t* set) 241,241,239
-int __sched_getaffinity:sched_getaffinity(pid_t pid, size_t setsize, cpu_set_t* set)  242,242,240
-int __getcpu:getcpu(unsigned *cpu, unsigned *node, void *unused) 345,318,312
+int sched_setscheduler(pid_t pid, int policy, const struct sched_param *param)  1
+int sched_getscheduler(pid_t pid)  1
+int sched_yield(void)  1
+int sched_setparam(pid_t pid, const struct sched_param *param)  1
+int sched_getparam(pid_t pid, struct sched_param *param)  1
+int sched_get_priority_max(int policy)  1
+int sched_get_priority_min(int policy)  1
+int sched_rr_get_interval(pid_t pid, struct timespec *interval)  1
+int sched_setaffinity(pid_t pid, size_t setsize, const cpu_set_t* set) 1
+int __sched_getaffinity:sched_getaffinity(pid_t pid, size_t setsize, cpu_set_t* set)  1
+int __getcpu:getcpu(unsigned *cpu, unsigned *node, void *unused) 1
 
 # io priorities
-int ioprio_set(int which, int who, int ioprio) 314,289,314
-int ioprio_get(int which, int who) 315,290,315
+int ioprio_set(int which, int who, int ioprio) 1
+int ioprio_get(int which, int who) 1
 
 # other
-int     uname(struct utsname *)  122
-mode_t  umask(mode_t)  60
-int      __reboot:reboot(int, int, int, void *)  88
-int     __syslog:syslog(int, char *, int)  103
-int     init_module(void *, unsigned long, const char *)  128
-int     delete_module(const char*, unsigned int)   129
-int     klogctl:syslog(int, char *, int)   103
-int     sysinfo(struct sysinfo *)  116
-int     personality(unsigned long)  136
-long    perf_event_open(struct perf_event_attr *attr_uptr, pid_t pid, int cpu, int group_fd, unsigned long flags) 364,336,333
+int     uname(struct utsname *)  1
+mode_t  umask(mode_t)  1
+int      __reboot:reboot(int, int, int, void *)  1
+int     __syslog:syslog(int, char *, int)  1
+int     init_module(void *, unsigned long, const char *)  1
+int     delete_module(const char*, unsigned int)   1
+int     klogctl:syslog(int, char *, int)   1
+int     sysinfo(struct sysinfo *)  1
+int     personality(unsigned long)  1
+long    perf_event_open(struct perf_event_attr *attr_uptr, pid_t pid, int cpu, int group_fd, unsigned long flags) 1
 
 # futex
-int	futex(void *, int, int, void *, void *, int) 240,240,238
+int	futex(void *, int, int, void *, void *, int) 1
 
 # epoll
-int     epoll_create(int size)     250,254,248
-int     epoll_ctl(int epfd, int op, int fd, struct epoll_event *event)    251,255,249
-int     epoll_wait(int epfd, struct epoll_event *events, int max, int timeout)   252,256,250
+int     epoll_create(int size)     1
+int     epoll_ctl(int epfd, int op, int fd, struct epoll_event *event)    1
+int     epoll_wait(int epfd, struct epoll_event *events, int max, int timeout)   1
 
-int     inotify_init(void)      316,291,284
-int     inotify_add_watch(int, const char *, unsigned int)  317,292,285
-int     inotify_rm_watch(int, unsigned int)  318,293,286
+int     inotify_init(void)      1
+int     inotify_add_watch(int, const char *, unsigned int)  1
+int     inotify_rm_watch(int, unsigned int)  1
 
-int     poll(struct pollfd *, unsigned int, long)  168,168,188
+int     poll(struct pollfd *, unsigned int, long)  1
 
-int     eventfd:eventfd2(unsigned int, int)  356,328,325
+int     eventfd:eventfd2(unsigned int, int)  1
 
 # ARM-specific ARM_NR_BASE == 0x0f0000 == 983040
-int     __set_tls:__ARM_NR_set_tls(void*)                                 983045,-1,-1
-int     cacheflush:__ARM_NR_cacheflush(long start, long end, long flags)  983042,-1,-1
+int     __set_tls:__ARM_NR_set_tls(void*)                                 1,-1,-1
+int     cacheflush:__ARM_NR_cacheflush(long start, long end, long flags)  1,-1,-1
 
 # MIPS-specific
-int	_flush_cache:cacheflush(char *addr, const int nbytes, const int op)	-1,-1,147
-int	syscall(int number,...) -1,-1,0
+int     _flush_cache:cacheflush(char *addr, const int nbytes, const int op) -1,-1,1
+int     syscall(int number,...) -1,-1,1
diff --git a/libc/tools/checksyscalls.py b/libc/tools/checksyscalls.py
deleted file mode 100755
index b32567684..000000000
--- a/libc/tools/checksyscalls.py
+++ /dev/null
@@ -1,188 +0,0 @@
-#!/usr/bin/python
-#
-# this tool is used to check that the syscall numbers that are in
-# SYSCALLS.TXT correspond to those found in the Linux kernel sources
-# for the arm, i386 and mips architectures
-#
-
-import sys, re, string, os, commands
-from   bionic_utils import *
-
-# change this if necessary
-syscalls_txt = "SYSCALLS.TXT"
-
-def usage():
-    print "usage: checksyscalls [options] [kernel_headers_rootdir]"
-    print "    options:    -v   enable verbose mode"
-    sys.exit(1)
-
-
-linux_root    = None
-syscalls_file = None
-
-def parse_command_line(args):
-    global linux_root, syscalls_file, verbose
-
-    program = args[0]
-    args    = args[1:]
-    while len(args) > 0 and args[0][0] == "-":
-        option = args[0][1:]
-        args   = args[1:]
-
-        if option == "v":
-            D_setlevel(1)
-        else:
-            usage()
-
-    if len(args) > 2:
-        usage()
-
-    if len(args) == 0:
-        linux_root = find_kernel_headers()
-        if linux_root == None:
-            print "Could not locate original or system kernel headers root directory."
-            print "Please specify one when calling this program, i.e. 'checksyscalls <headers-directory>'"
-            sys.exit(1)
-        print "using the following kernel headers root: '%s'" % linux_root
-    else:
-        linux_root = args[0]
-        if not os.path.isdir(linux_root):
-            print "the directory '%s' does not exist. aborting\n" % headers_root
-            sys.exit(1)
-
-parse_command_line(sys.argv)
-
-syscalls_file = find_file_from_upwards(None, syscalls_txt)
-if not syscalls_file:
-    print "could not locate the %s file. Aborting" % syscalls_txt
-    sys.exit(1)
-
-print "parsing %s" % syscalls_file
-
-# read the syscalls description file
-#
-
-parser = SysCallsTxtParser()
-parser.parse_file(syscalls_file)
-syscalls = parser.syscalls
-
-re_nr_line       = re.compile( r"#define __NR_(\w*)\s*\(__NR_SYSCALL_BASE\+\s*(\w*)\)" )
-re_nr_clock_line = re.compile( r"#define __NR_(\w*)\s*\(__NR_timer_create\+(\w*)\)" )
-re_arm_nr_line   = re.compile( r"#define __ARM_NR_(\w*)\s*\(__ARM_NR_BASE\+\s*(\w*)\)" )
-re_x86_line      = re.compile( r"#define __NR_(\w*)\s*([0-9]*)" )
-re_mips_line     = re.compile( r"#define __NR_(\w*)\s*\(__NR_Linux\s*\+\s*([0-9]*)\)" )
-
-# now read the Linux arm header
-def process_nr_line(line,dict):
-
-    m = re_mips_line.match(line)
-    if m:
-        if dict["Linux"]==4000:
-            dict[m.group(1)] = int(m.group(2))
-        return
-
-    m = re_nr_line.match(line)
-    if m:
-        dict[m.group(1)] = int(m.group(2))
-        return
-
-    m = re_nr_clock_line.match(line)
-    if m:
-        dict[m.group(1)] = int(m.group(2)) + 259
-        return
-
-    m = re_arm_nr_line.match(line)
-    if m:
-        offset_str = m.group(2)
-        #print "%s = %s" % (m.group(1), offset_str)
-        base = 10
-        if offset_str.lower().startswith("0x"):
-          # Processing something similar to
-          #   #define __ARM_NR_cmpxchg  (__ARM_NR_BASE+0x00fff0)
-          base = 16
-        dict["ARM_"+m.group(1)] = int(offset_str, base) + 0x0f0000
-        return
-
-    m = re_x86_line.match(line)
-    if m:
-        # try block because the ARM header has some #define _NR_XXXXX  /* nothing */
-        try:
-            #print "%s = %s" % (m.group(1), m.group(2))
-            dict[m.group(1)] = int(m.group(2))
-        except:
-            pass
-        return
-
-
-def process_header(header_file,dict):
-    fp = open(header_file)
-    D("reading "+header_file)
-    for line in fp.xreadlines():
-        line = line.strip()
-        if not line: continue
-        process_nr_line(line,dict)
-    fp.close()
-
-arm_dict = {}
-x86_dict = {}
-mips_dict = {}
-
-# remove trailing slash from the linux_root, if any
-if linux_root[-1] == '/':
-    linux_root = linux_root[:-1]
-
-arm_unistd = find_arch_header(linux_root, "arm", "unistd.h")
-if not arm_unistd:
-    print "WEIRD: Could not locate the ARM unistd.h kernel header file,"
-    print "maybe using a different set of kernel headers might help."
-    sys.exit(1)
-
-# on recent kernels, asm-i386 and asm-x64_64 have been merged into asm-x86
-# with two distinct unistd_32.h and unistd_64.h definition files.
-# take care of this here
-#
-x86_unistd = find_arch_header(linux_root, "i386", "unistd.h")
-if not x86_unistd:
-    x86_unistd = find_arch_header(linux_root, "x86", "unistd_32.h")
-    if not x86_unistd:
-        print "WEIRD: Could not locate the i386/x86 unistd.h header file,"
-        print "maybe using a different set of kernel headers might help."
-        sys.exit(1)
-
-mips_unistd = find_arch_header(linux_root, "mips", "unistd.h")
-if not mips_unistd:
-    print "WEIRD: Could not locate the Mips unistd.h kernel header file,"
-    print "maybe using a different set of kernel headers might help."
-    sys.exit(1)
-
-process_header( arm_unistd, arm_dict )
-process_header( x86_unistd, x86_dict )
-process_header( mips_unistd, mips_dict )
-
-# now perform the comparison
-errors = 0
-
-def check_syscalls(archname, idname, arch_dict):
-    errors = 0
-    for sc in syscalls:
-        sc_name = sc["name"]
-        sc_id   = sc[idname]
-        if sc_id == -1:
-            sc_id = sc["common"]
-        if sc_id >= 0:
-            if not arch_dict.has_key(sc_name):
-                print "error: %s syscall %s not defined, should be %d" % (archname, sc_name, sc_id)
-                errors += 1
-            elif arch_dict[sc_name] != sc_id:
-                print "error: %s syscall %s should be %d instead of %d" % (archname, sc_name, arch_dict[sc_name], sc_id)
-                errors += 1
-    return errors
-
-errors += check_syscalls("arm", "armid", arm_dict)
-errors += check_syscalls("x86", "x86id", x86_dict)
-errors += check_syscalls("mips", "mipsid", mips_dict)
-
-if errors == 0:
-    print "congratulations, everything's fine !!"
-else:
-    print "correct %d errors !!" % errors