Hi, I've seen void (*sv_prepsyscall)(struct trapframe *, int *, u_int *, caddr_t *); field in struct sysentvec defined in sys/sysent.h; I've seen it's call be the current process in syscall interrupt 0x80 handling and it seems to set number of arguments and base pointer for syscall arguments. It's not a comment in the code, somebody could tell me what is the task of this field?
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