[libc] add reference for syscall numbers

Signed-off-by: Shreeyash Pandey <[email protected]>

Author: bojle

libc/src/__support/OSUtil/darwin/aarch64/syscall.h

@@ -110,6 +110,14 @@ LIBC_INLINE long syscall_impl(long number, long arg1, long arg2, long arg3,
 #undef REGISTER_CONSTRAINT_5
 #undef REGISTER_CONSTRAINT_6
 
+/* Following has been copied from MacOSX15.5 sdk
+ * This has been referenced from and generated by the syscalls.master file
+ * that can be found
+ * https://github.com/apple-oss-distributions/xnu/blob/f6217f891ac0bb64f3d375211650a4c1ff8ca1ea/bsd/kern/syscalls.master
+ */
+
+/* SYSCALL NUMBERS START */
+
 #define SYS_syscall 0
 #define SYS_exit 1
 #define SYS_fork 2
@@ -671,4 +679,6 @@ LIBC_INLINE long syscall_impl(long number, long arg1, long arg2, long arg3,
 #define SYS_MAXSYSCALL 558
 #define SYS_invalid 63
 
+/* SYSCALL NUMBERS END */
+
 #endif // LLVM_LIBC_SRC___SUPPORT_OSUTIL_DARWIN_ARM_SYSCALL_H