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uclinux-2008R1.5-RC3(bf561)到VDSP5的移植(19):_stext

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<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />

快乐虾

http://blog.csdn.net/lights_joy/

lights@hb165.com

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)

欢迎转载,但请保留作者信息

看看到目前为止还有几个error

[Error li1021] The following symbols referenced in processor 'p0' could not be resolved:

'_stext [__stext]' referenced from 'corea.dlb[head.doj]'

'bf53x_relocate_l1_mem [_bf53x_relocate_l1_mem]' referenced from 'corea.dlb[head.doj]'

'cmdline_init [_cmdline_init]' referenced from 'corea.dlb[head.doj]'

'init_pda [_init_pda]' referenced from 'corea.dlb[head.doj]'

'init_thread_union [_init_thread_union]' referenced from 'corea.dlb[head.doj]'

'start_kernel [_start_kernel]' referenced from 'corea.dlb[head.doj]'

下面开始解决_stext的问题。

先看看head.s中对_stext的使用:

/* In case there is a NULL pointer reference

* Zero out region before stext

*/

p1.l = 0x0;

p1.h = 0x0;

r0.l = __stext;

r0.h = __stext;

r0 = r0 >> 1;

p2 = r0;

r0 = 0;

lsetup (.L_clear_zero, .L_clear_zero) lc0 = p2;

.L_clear_zero:

W[p1++] = r0;

这段代码的用意在于将代码段之前的SDRAM空间清0。在vmlinux.lds.s中将_stext定义为指向代码段的首地址,如下所示:

.text :

{

__text = .;

_text = .;

__stext = .;

TEXT_TEXT

SCHED_TEXT

LOCK_TEXT

KPROBES_TEXT

*(.text.*)

*(.fixup)

. = ALIGN(16);

___start___ex_table = .;

*(__ex_table)

___stop___ex_table = .;

. = ALIGN(4);

__etext = .;

}

相应地我们要在LDF文件中添加内容,还是先给代码段定义空间:

MEM_UCLINUX_TEXT { TYPE(RAM) START(0x00010000) END(0x0001ffff) WIDTH(8) }

MEM_UCLINUX_DATA { TYPE(RAM) START(0x00020000) END(0x0002ffff) WIDTH(8) }

MEM_UCLINUX_BSS { TYPE(RAM) START(0x00030000) END(0x0003ffff) WIDTH(8) }

MEM_SDRAM_BANK0 { TYPE(RAM) START(0x00040000) END(0x00ffffff) WIDTH(8) }

MEM_SDRAM_BANK1 { TYPE(RAM) START(0x01000000) END(0x01ffffff) WIDTH(8) }

MEM_SDRAM_BANK2 { TYPE(RAM) START(0x02000000) END(0x02ffffff) WIDTH(8) }

MEM_SDRAM_BANK3 { TYPE(RAM) START(0x03000000) END(0x03ffffff) WIDTH(8) }

接下来在p0里面定义text段:

uclinux_text

{

__text = .;

_text = .;

__stext = .;

/*

TEXT_TEXT

SCHED_TEXT

LOCK_TEXT

KPROBES_TEXT

*(.text.*)

*(.fixup)

. = ALIGN(16);

___start___ex_table = .;

*(__ex_table)

___stop___ex_table = .;

*/

INPUT_SECTION_ALIGN(4)

__etext = .;

} > MEM_UCLINUX_TEXT

内容暂时为空,后面根据需要添加。

看看还有几个error

[Error li1021] The following symbols referenced in processor 'p0' could not be resolved:

'bf53x_relocate_l1_mem [_bf53x_relocate_l1_mem]' referenced from 'corea.dlb[head.doj]'

'cmdline_init [_cmdline_init]' referenced from 'corea.dlb[head.doj]'

'init_pda [_init_pda]' referenced from 'corea.dlb[head.doj]'

'init_thread_union [_init_thread_union]' referenced from 'corea.dlb[head.doj]'

'start_kernel [_start_kernel]' referenced from 'corea.dlb[head.doj]'

1 参考资料

uclinux-2008R1.5-RC3(bf561)到VDSP5的移植(1):前言(<?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" /><chsdate w:st="on" isrocdate="False" islunardate="False" day="12" month="1" year="2009">2009-1-12</chsdate>)

uclinux-2008R1.5-RC3(bf561)到VDSP5的移植(2):代码注释(<chsdate w:st="on" isrocdate="False" islunardate="False" day="12" month="1" year="2009">2009-1-12</chsdate>)

uclinux-2008R1.5-RC3(bf561)到VDSP5的移植(3):vdsp项目创建(<chsdate w:st="on" isrocdate="False" islunardate="False" day="12" month="1" year="2009">2009-1-12</chsdate>)

uclinux-2008R1.5-RC3(bf561)到VDSP5的移植(4):目录差异(<chsdate w:st="on" isrocdate="False" islunardate="False" day="12" month="1" year="2009">2009-1-12</chsdate>)

uclinux-2008R1.5-RC3(bf561)到VDSP5的移植(5):'bf561.h'的问题(<chsdate w:st="on" isrocdate="False" islunardate="False" day="12" month="1" year="2009">2009-1-12</chsdate>)

uclinux-2008R1.5-RC3(bf561)到VDSP5的移植(6)CONFIG_BFIN_KERNEL_CLOCK(<chsdate w:st="on" isrocdate="False" islunardate="False" day="12" month="1" year="2009">2009-1-12</chsdate>)

uclinux-2008R1.5-RC3(bf561)到VDSP5的移植(7)CONFIG_MEM_MT48LC16M16A2TG_75(<chsdate w:st="on" isrocdate="False" islunardate="False" day="12" month="1" year="2009">2009-1-12</chsdate>)

uclinux-2008R1.5-RC3(bf561)到VDSP5的移植(8):CONFIG_CLKIN_HZ(<chsdate w:st="on" isrocdate="False" islunardate="False" day="12" month="1" year="2009">2009-1-12</chsdate>)

uclinux-2008R1.5-RC3(bf561)到VDSP5的移植(9):CONFIG_MEM_SIZE(<chsdate w:st="on" isrocdate="False" islunardate="False" day="12" month="1" year="2009">2009-1-12</chsdate>)

uclinux-2008R1.5-RC3(bf561)到VDSP5的移植(10):CONFIG_FLASH_SPEED_BTT(<chsdate w:st="on" isrocdate="False" islunardate="False" day="13" month="1" year="2009">2009-1-13</chsdate>)

uclinux-2008R1.5-RC3(bf561)到VDSP5的移植(11):__INIT(<chsdate w:st="on" isrocdate="False" islunardate="False" day="13" month="1" year="2009">2009-1-13</chsdate>)

uclinux-2008R1.5-RC3(bf561)到VDSP5的移植(12):trace_buffer_init(<chsdate w:st="on" isrocdate="False" islunardate="False" day="13" month="1" year="2009">2009-1-13</chsdate>)

uclinux-2008R1.5-RC3(bf561)到VDSP5的移植(13):ENDPROC(<chsdate w:st="on" isrocdate="False" islunardate="False" day="13" month="1" year="2009">2009-1-13</chsdate>)

uclinux-2008R1.5-RC3(bf561)VDSP5的移植(14)__FINIT(<chsdate w:st="on" isrocdate="False" islunardate="False" day="13" month="1" year="2009">2009-1-13</chsdate>)

uclinux-2008R1.5-RC3(bf561)VDSP5的移植(15)CONFIG_BANK_x(<chsdate w:st="on" isrocdate="False" islunardate="False" day="13" month="1" year="2009">2009-1-13</chsdate>)

uclinux-2008R1.5-RC3(bf561)VDSP5的移植(16):使用head.s做为入口点(<chsdate w:st="on" isrocdate="False" islunardate="False" day="13" month="1" year="2009">2009-1-13</chsdate>)

uclinux-2008R1.5-RC3(bf561)VDSP5的移植(17)__bss_start(<chsdate w:st="on" isrocdate="False" islunardate="False" day="13" month="1" year="2009">2009-1-13</chsdate>)

uclinux-2008R1.5-RC3(bf561)VDSP5的移植(18)_sdata(<chsdate w:st="on" isrocdate="False" islunardate="False" day="14" month="1" year="2009">2009-1-14</chsdate>)

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