--- arch/i386/kernel/entry.S.orig 2002-08-02 19:39:42.000000000 -0500 +++ arch/i386/kernel/entry.S 2002-10-08 15:43:08.000000000 -0500 @@ -584,8 +584,8 @@ .long SYMBOL_NAME(sys_capset) /* 185 */ .long SYMBOL_NAME(sys_sigaltstack) .long SYMBOL_NAME(sys_sendfile) - .long SYMBOL_NAME(sys_ni_syscall) /* streams1 */ - .long SYMBOL_NAME(sys_ni_syscall) /* streams2 */ + .long SYMBOL_NAME(sys_getpmsg) /* streams1 */ + .long SYMBOL_NAME(sys_putpmsg) /* streams2 */ .long SYMBOL_NAME(sys_vfork) /* 190 */ .long SYMBOL_NAME(sys_getrlimit) .long SYMBOL_NAME(sys_mmap2) --- kernel/ksyms.c.orig 2002-08-02 19:39:46.000000000 -0500 +++ kernel/ksyms.c 2002-10-10 10:46:43.000000000 -0500 @@ -497,6 +497,11 @@ EXPORT_SYMBOL(seq_release); EXPORT_SYMBOL(seq_read); EXPORT_SYMBOL(seq_lseek); +extern int register_streams_calls(int (*putpmsg) (int,void *,void *,int,int), + int (*getpmsg) (int,void *,void *,int,int)); +extern void unregister_streams_calls(void); +EXPORT_SYMBOL(register_streams_calls); +EXPORT_SYMBOL(unregister_streams_calls); /* Program loader interfaces */ EXPORT_SYMBOL(setup_arg_pages); --- kernel/sys.c.orig 2002-08-02 19:39:46.000000000 -0500 +++ kernel/sys.c 2002-10-10 10:51:27.000000000 -0500 @@ -167,6 +167,50 @@ return notifier_chain_unregister(&reboot_notifier_list, nb); } +static int (*do_putpmsg) (int, void *, void *, int, int) = NULL; +static int (*do_getpmsg) (int, void *, void *, int, int) = NULL; + +static DECLARE_RWSEM(streams_call_sem) ; + +long asmlinkage sys_putpmsg(int fd, void *ctlptr, void *datptr, int band, int flags) +{ + int ret = -ENOSYS; + down_read(&streams_call_sem) ; /* should return int, but doesn't */ + if (do_putpmsg) + ret = (*do_putpmsg) (fd, ctlptr, datptr, band, flags); + up_read(&streams_call_sem); + return ret; +} + +long asmlinkage sys_getpmsg(int fd, void *ctlptr, void *datptr, int band, int flags) +{ + int ret = -ENOSYS; + down_read(&streams_call_sem) ; /* should return int, but doesn't */ + if (do_getpmsg) + ret = (*do_getpmsg) (fd, ctlptr, datptr, band, flags); + up_read(&streams_call_sem); + return ret; +} + +int register_streams_calls(int (*putpmsg) (int, void *, void *, int, int), + int (*getpmsg) (int, void *, void *, int, int)) +{ + down_write(&streams_call_sem) ; /* should return int, but doesn't */ + if ( (putpmsg != NULL && do_putpmsg != NULL) + || (getpmsg != NULL && do_getpmsg != NULL) + ) + return -EBUSY; + do_putpmsg = putpmsg; + do_getpmsg = getpmsg; + up_write(&streams_call_sem); + return 0 ; +} + +void unregister_streams_calls(void) +{ + register_streams_calls(NULL, NULL); +} + asmlinkage long sys_ni_syscall(void) { return -ENOSYS;