编译时一个变量出现地址编码出现警告

警告如下：

"../vlfftApps/func_master_SynDetect_FreMF.c", line 322: warning #17003-D: relocation from function "funcm_SynDetect" to symbol "mytestnum" overflowed; the 29-bit relocated address 0x1fe30b03 is too large to encode in the 15-bit unsigned field (type = 'R_C6000_SBR_U15_W' (13), file = "./vlfftApps/func_master_SynDetect_FreMF.obj", offset = 0x00000cac, section = ".text")

定义变量的方式如下

#pragma DATA_SECTION(mytestnum, ".externalMEM");
volatile int mytestnum;

在../vlfftApps/func_master_SynDetect_FreMF.c中声明如下

extern volatile int mytestnum;

对于编译的东西我不懂，我想知道的是

1.为什么重定位的时候会溢出？这个溢出是指后边的地址编码不能用15bit的无符号域来表示吗？

2. file = "./vlfftApps/func_master_SynDetect_FreMF.obj", offset = 0x00000cac, section = ".text"中，这个offset指的是"./vlfftApps/func_master_SynDetect_FreMF.obj"相对于 ".text"的位置吗？

3.对于出现的这个问题，我应该怎么解决。