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#ifndef _SYSCALL_TABLE_H_
#define _SYSCALL_TABLE_H_
/* header file for the file syscall_table.c which is automatically generated
during the building/compilation process. The source file to generate
arch_table.c is vu_syscall.conf */
struct syscall_descriptor_t;
struct vuht_entry_t;
/* a choice function processes the actual arguments of a system call request
and returns the pointer to the hash table entry which is responsible to handle
the request. When a choice function returns NULL it means that the request
is not to be virtualized, so it is forwarded to the kernel */
typedef struct vuht_entry_t *choicef_t(struct syscall_descriptor_t *);
typedef void wrapf_t(struct vuht_entry_t *, struct syscall_descriptor_t *);
/* vu_syscall_table defines for each _VU_ system call:
the choice function,
the system call pre-processing wrapper
it is evaluated before the kernel gets the system call.
the system call co-processing wrapper
it is evaluated while the kernel is processing the request
the system call post-processing wrapper
it runs when the kernel has completed the system call request
*/
struct syscall_tab_entry{
choicef_t *choicef;
wrapf_t *wrapinf;
wrapf_t *wrapduringf;
wrapf_t *wrapoutf;
};
struct vsyscall_tab_entry{
choicef_t *choicef;
wrapf_t *wrapf;
};
extern const struct syscall_tab_entry vu_syscall_table[];
extern const struct vsyscall_tab_entry vvu_syscall_table[];
/* these arrays provide the names of _VU_ system calls (for debugging purposes) */
extern const char *vu_syscall_names[];
extern const char *vvu_syscall_names[];
#endif
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