急啊，高手帮忙看看！！！！！！！！

static void blint_fiq_handler_setup(void)
+{
+ void *fiqhandler_start;
+ unsigned int fiqhandler_length;
+ struct pt_regs regs;
+ extern unsigned char blint_fiq_handler_start, blint_fiq_handler_end;
+
+ printk(\"FIQ: Setting up handler for battery low fast interrupt\\n\");
+
+ fiqhandler_start = &blint_fiq_handler_start;
+ fiqhandler_length = &blint_fiq_handler_end - &blint_fiq_handler_start;
+
+ if (claim_fiq(&blint_fh)) {
+  printk(\"FIQ: Could not claim fast interrupt\\n\");
+  return;
+ }
+
+ set_fiq_handler(fiqhandler_start, fiqhandler_length);
+ set_fiq_regs(?s);
+ psionw_writel(1, BLEOI);
+ enable_fiq(IRQ_BLINT);
+}
.................................................................
.................................................................


+/*
+ *  linux/arch/arm/lib/psionwblint.S
+ *
+ *  Copyright (C) 2002 Tony Lindgren <tony@atomide.com>
+ *
+ *  Modeled after Russel King\'s floppydma.S
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
#include <linux/linkage.h>
+#include <asm/assembler.h>
+#include <asm/hardware/psionw.h>
+  .text
+
+  .global SYMBOL_NAME(extfiq_handler_end)
+ENTRY(extfiq_handler_start)
+  mov r11, #0xdf000000 @ VBASE
+  mov r12,  #\'E\'
+         strb r12, [r11, #0x700] @ UART2
+  subs    pc,   lr,  #4  @ return
+SYMBOL_NAME(extfiq_handler_end):
+
+  .global SYMBOL_NAME(blint_fiq_handler_end)
+ENTRY(blint_fiq_handler_start)
+  mov r11, #0xdf000000 @ VBASE
+  str r11, [r11, #0x0410] @ write to BLEOI
+
+  ldr r12, [r11, #0x0e08] @ load PCDR
+  bic r12, r12, #0x10  @ clear PCDR_LIGHT
+  str r12, [r11, #0x0e08] @ write PCDR
+
+  mov r12,  #\'B\'
+         strb r12, [r11, #0x700] @ UART2
+  subs    pc,   lr,  #4  @ return
+SYMBOL_NAME(blint_fiq_handler_end):
.....................................................
第一个函数是申请FIQ，他会用到两个变量blint_fiq_handler_start,blint_fiq_handler_end
这两个变量没有定义
第二个函数是一个汇编程序，它里面包括了两个类型的FIQ，现在只看blint_fiq
它在用ENTRY(blint_fiq_handler_start)和SYMBOL_NAME(blint_fiq_handler_end)时，这两个变量需要赋值么，还是一旦调用了他们两个，他们就会变成有值的了，使得第一个函数调用它们时不用再对它们赋值了。那么第二个函数的作用是什么哪，没看懂它的源代码。在编译驱动时（第一个函数包含在驱动程序driver.c里面），第二个函数和驱动的关系是什么，要把它放在哪哪？
急啊！！在搞不出这个程序，老师就怒了，请高手帮忙看看！！！
跪谢！！！！！