Author: julian Date: Fri Dec 2 06:27:14 2016 New Revision: 309395 URL: https://svnweb.freebsd.org/changeset/base/309395
Log: MFH: r297012 Add a few details that make it easier to use this macro. Sponsored by: Panzura inc Modified: stable/10/share/man/man9/SYSCALL_MODULE.9 Directory Properties: stable/10/ (props changed) Modified: stable/10/share/man/man9/SYSCALL_MODULE.9 ============================================================================== --- stable/10/share/man/man9/SYSCALL_MODULE.9 Fri Dec 2 06:15:59 2016 (r309394) +++ stable/10/share/man/man9/SYSCALL_MODULE.9 Fri Dec 2 06:27:14 2016 (r309395) @@ -57,6 +57,8 @@ A pointer to an which saves the offset in .Vt "struct sysent" where the syscall is allocated. +If the location pointed to by offset holds a non 0 number it will be used if possible. +If it holds 0 then one will be assigned. .It Fa new_sysent is a pointer to a structure that specifies the function implementing the syscall and the number of arguments this function needs (see @@ -72,6 +74,17 @@ The argument passed to the callback func .Fa evh event handler when it is called. .El +.Pp +The syscall number assigned to the module can be retrieved using the +.Xr modstat 3 +and +.Xr modfind 3 +library functions in libc. +The MACRO +.Fn SYSCALL_MODULE_HELPER +includes +.Fn SYSCALL_MODULE +and much of its boilerplate code. .Sh EXAMPLES A minimal example for a syscall module can be found in .Pa /usr/share/examples/kld/syscall/module/syscall.c . _______________________________________________ svn-src-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
