Another issue (I should report it as a bug imho) is that Do_Syscall is not really usable if you require to use different parameters then integer value, for example: PChar.
A call for example that use PChar as one of it's parameter is inotify_add_watch . I think that the entire design of the Do_SysCall is malformed in the way it assumes the number of parameters and also the type of them, so as I asked before, how I can either call the syscall command without assembler, or how I can pass an array of const (prior to that I asked regarding array of TSysParam) to assembly if three is no other way to use syscall ? Ido On Feb 15, 2008 9:50 PM, ik <[EMAIL PROTECTED]> wrote: > On Fri, Feb 15, 2008 at 8:36 PM, Micha Nelissen <[EMAIL PROTECTED]> wrote: > > ik wrote: > > > Actually the assembler is not that hard to understand :) > > > My point is, that I don't like the idea of 7 or 20 or 100 amount of > > > parameters to give answer to every need. I think we should find a > > > better way to implement it, like var args in C or open array in > > > pascal... > > > > The linux kernel interface is always using registers, and since there > > are a limited amount of registers, there is a max. number of arguments. > > IIRC the maximum is 6, i386 limited: eax, ebx, ecx, edx, esi, edi, ebp. > > You are welcome to correct me if I wrong, but can't I use prameters as > follows: > > push param1 > push param2 > push param3 > .... > push paramX > call syscall > > ? > > If so, then I don't think there is a specific need for using the eax, > ebx registers etc.. > Please look at the C deceleration of the syscall: > int syscall(int number, ...); > > > It uses var_args, and therefor 6 registers are not enough imho... > because tomorrow some one can add new call with 10 params, and then > what ? I can't find any documentation that limit the amount of > parameters that can be given to the function (at least in Linux, maybe > POSIX/BSD/Solaris/Other have different rules) > > > > Micha > > > Ido > -- > http://ik.homelinux.org/ > -- http://ik.homelinux.org/ _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
