uclinux-2008R1.5-RC3(bf561)到VDSP5的移植(59)：current_text_addr

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本文适用于

ADI bf561 DSP

优视BF561EVB开发板

uclinux-2008r1.5-rc3(smp patch)

Visual DSP++ 5.0(update 5)

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在include/asm/processor.h中有这样一个定义：

/*

* Default implementation of macro that returns current

* instruction pointer ("program counter").

*/

#define current_text_addr() ({ __label__ _l; _l: &&_l;})

它的作用就是取当前PC的值，但是这行语句在VDSP下会引起一个错误：

..\..\security\commoncap.c

"..\..\include\linux/skbuff.h", line 897: cc1454: error: taking the address of a label is not a supported feature skb_over_panic(skb, len, current_text_addr());

^

"..\..\include\linux/skbuff.h", line 922: cc1454: error: taking the address of a label is not a supported feature skb_under_panic(skb, len, current_text_addr());

^

2 errors detected in the compilation of "..\..\security\commoncap.c".

cc3089: fatal error: Compilation failed

Tool failed with exit/exception code: 1.

Build was unsuccessful.

对其做如下修改：

static inline unsigned long current_text_addr(void)

{

unsigned long pc;

__asm__ __volatile__("%0 = rets;\n\t":"=d"(pc));

return pc;

}

1 参考资料

uclinux-2008R1.5-RC3(bf561)到VDSP5的移植(54)：MEM_SDRAM_BANKx(2009-2-1)

uclinux-2008R1.5-RC3(bf561)到VDSP5的移植(55)：CONFIG_FLAT_NODE_MEM_MAP(2009-02-03)

uclinux-2008R1.5-RC3(bf561)到VDSP5的移植(56)：L1 data memory overflow(2009-02-03)

uclinux-2008R1.5-RC3(bf561)到VDSP5的移植(57)：bsz(2009-2-3)

uclinux-2008R1.5-RC3(bf561)到VDSP5的移植(58)：_cplb_mgr(2009-2-3)

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