Sanjay Kumar, Noida (sanjayku@xxxxxxxxxxxxxxxxx) wrote: > The inline assembley code is > making a system call ( int $0x80) > passing system call number (__NR_##name) and argument( arg1) it requires. > The value returned from the system call is obtained in __res variable > a and b denotes eax and ebx registers respectively. > Basically the inline assembly format is like > asm ( assembler template > : output operands > : input operands); hi, As I know, to switch from user to kernel land, parameters are push on stack and eax contains nr_syscall (number of the system call). Afterwards, an 0x80 int are generated: (int $0x80). Now you are in : linux/arch/i386/kernel/entry.S and syscall are choiced by eax register and kernel sys_ function is called. If I say some awful mistake, please correct me. I am here to learn :-) -- Amicalement/Regards Christophe Lucas - c.lucas@xxxxxxxxxxx - Registered User #271267 * GNU/Linux developer/network administrator * Membre du RotomaLUG (LUG de la région Rouennaise) (http://www.rotomalug.org) * http://odie.mcom.fr/~clucas/
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