just to side-track a little. is it ok to program in this way? suppose i have a routine call write2() that has the same arguments as write(). i call write2() in a c program, and i write a separate implementation of write2 in a .s file. is it ok to pop the eip address, pop the 3 arguments from the stack and store them accordingly to ebx, ecx, edx, and then call sys_write? i managed to run it on my pc. but when i tried running it on another pc of similar configurations (pentium 166 running redhat), it ran well, but with a segfault. please advise. <quote who="SACHIN PRASAD"> > > > Iknow that this is little OT , but i guess this is the best place where i > 'll get the exact answer. > > mov eax,5 ; the syscall number for open() > ; we already have the filename in ebx > > mov ecx,0 ; O_RDONLY, defined in fcntl.h > > int 80h ; call the kernel > > Now my problem is how the system call 80h knows that only eax has the > required argument and the second argument is in ecx . Why not the first > argument in ecx register ? > > thanks in advance > sachin prasad > > > > > _________________________________________________________________ > MSN 8 helps eliminate e-mail viruses. Get 2 months FREE* > http://join.msn.com/?page=features/virus > > -- > Kernelnewbies: Help each other learn about the Linux kernel. > Archive: http://mail.nl.linux.org/kernelnewbies/ > FAQ: http://kernelnewbies.org/faq/ > -- eMail: eugeneteo@eugeneteo.net, eugeneteo@null.cc.uic.edu gpg pub_key: http://www.comp.nus.edu.sg/~teohanhu/eugeneteo.asc main(i){putchar(182623909>>(i-1)*5&31|!!(i<7)<<6)&&main(++i);} -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
