/*
 * sys/syscall.h — the raw syscall interface.
 *
 * syscall() is the ONLY place in nulsl-libc that talks the kernel ABI.
 * Everything above it (read, write, exit, ...) is a wrapper.
 *
 * SYS_* constants below are the x86_64 numbers for the syscalls the libc
 * itself wraps or its tests use. They are #ifndef-guarded so kernel UAPI
 * headers can coexist. Extend the table as needed (docs/syscalls.md).
 */

#ifndef _NULSL_SYS_SYSCALL_H
#define _NULSL_SYS_SYSCALL_H

#ifdef __cplusplus
extern "C" {
#endif

long syscall(long number, ...);

/* x86_64 syscall numbers (Linux ABI). */
#ifndef SYS_read
#define SYS_read 0
#endif
#ifndef SYS_write
#define SYS_write 1
#endif
#ifndef SYS_open
#define SYS_open 2
#endif
#ifndef SYS_close
#define SYS_close 3
#endif
#ifndef SYS_getpid
#define SYS_getpid 39
#endif
#ifndef SYS_exit
#define SYS_exit 60
#endif
#ifndef SYS_unlink
#define SYS_unlink 87
#endif
#ifndef SYS_clock_gettime
#define SYS_clock_gettime 228
#endif

#ifdef __cplusplus
}
#endif

#endif /* _NULSL_SYS_SYSCALL_H */