add copy_file_range system call wrapper

Makefile

@@ -189,6 +189,9 @@ obj/crt/crt1_linux.o: qualcomm-software/crt/arm/crt1_linux.s
 
 CRT_OBJS += obj/crt/crt1_linux.o
 CRT_LIBS += lib/crt1_linux.o
+
+EXCLUDED := obj/src/linux/copy_file_range.o
+ALL_OBJS := $(filter-out $(EXCLUDED), $(ALL_OBJS))
 endif
 endif
 # Qualcomm-specific code - end

include/unistd.h

@@ -190,6 +190,9 @@ char *get_current_dir_name(void);
 int syncfs(int);
 int euidaccess(const char *, int);
 int eaccess(const char *, int);
+#ifndef __QUIC_BAREMETAL
+ssize_t copy_file_range(int, off_t *, int, off_t *, size_t, unsigned);
+#endif // __QUIC_BAREMETAL
 #endif
 
 #if defined(_LARGEFILE64_SOURCE) || defined(_GNU_SOURCE)

src/linux/copy_file_range.c

@@ -0,0 +1,8 @@
+#define _GNU_SOURCE
+#include <unistd.h>
+#include "syscall.h"
+
+ssize_t copy_file_range(int fd_in, off_t *off_in, int fd_out, off_t *off_out, size_t len, unsigned flags)
+{
+	return syscall(SYS_copy_file_range, fd_in, off_in, fd_out, off_out, len, flags);
+}