|
ARM9裸机编程代码有init.S,Vect.S,main.c文件,看名字就可以知道每个文件是什么意思了,
MDK中ARM9的链接脚本如下:
LR_IROM1 0x00000020 0x2000000 { ; load region size_region
ER_IROM1 0x00000020 0x2000000 { ; load address = execution address
*.o (INIT, +First)
*(InRoot$$Sections)
.ANY (+RO)
}
RW_RAM1 +0 { ; RW_RAM1 start address is after ER_ROM1
.ANY (+RW +ZI)
}
}
查看生成的map文件,其中有如下内容:
Image Entry point : 0x00000020
Load Region LR_IROM1 (Base: 0x00000020, Size: 0x00004010, Max: 0x02000000, ABSOLUTE, COMPRESSED[0x00003ddc])
Execution Region ER_IROM1 (Base: 0x00000020, Size: 0x00003d54, Max: 0x02000000, ABSOLUTE)
Base Addr Size Type Attr Idx E Section Name Object
0x00000020 0x00000060 Code RO 98 * INIT sys_boot0_start.o
0x00000080 0x00000008 Code RO 1467 * !!!main c_5.l(__main.o)
0x00000088 0x0000003c Code RO 1678 !!!scatter c_5.l(__scatter.o)
0x000000c4 0x0000005c Code RO 1676 !!dczerorl2 c_5.l(__dczerorl2.o)
0x00000120 0x00000028 Code RO 1680 !!handler_copy c_5.l(__scatter_copy.o)
0x00000148 0x0000002c Code RO 1682 !!handler_zi c_5.l(__scatter_zi.o)
。。。。。。。。。。。。。
。。。。。。。。。。。。。
0x0000071c 0x00000030 Code RO 1380 SYS_INIT sys_ctl.o
0x0000074c 0x00000094 Code RO 94 Vect vectors.o
。。。。。。。。。。。。。
但我希望Vectors.o即Vect节放在INIT节之后,不要放得太远,我按下面处理:
LR_IROM1 0x00000020 0x2000000 { ; load region size_region
ER_IROM1 0x00000020 0x2000000 { ; load address = execution address
sys_boot0_start.o (INIT, +First)
}
VECT +0 {
vectors.o(Vect)
*(InRoot$$Sections)
.ANY (+RO)
}
RW_RAM1 +0 { ; RW_RAM1 start address is after ER_ROM1
.ANY (+RW +ZI)
}
}
查看生成的map文件,其中有如下内容:
Image Entry point : 0x00000020
Load Region LR_IROM1 (Base: 0x00000020, Size: 0x00004010, Max: 0x02000000, ABSOLUTE, COMPRESSED[0x00003ddc])
Execution Region ER_IROM1 (Base: 0x00000020, Size: 0x00000060, Max: 0x02000000, ABSOLUTE)
Base Addr Size Type Attr Idx E Section Name Object
0x00000020 0x00000060 Code RO 98 * INIT sys_boot0_start.o
Execution Region VECT (Base: 0x00000080, Size: 0x00003cf4, Max: 0xffffffff, ABSOLUTE)
Base Addr Size Type Attr Idx E Section Name Object
0x00000080 0x00000008 Code RO 1467 * !!!main c_5.l(__main.o)
0x00000088 0x0000003c Code RO 1678 !!!scatter c_5.l(__scatter.o)
0x000000c4 0x0000005c Code RO 1676 !!dczerorl2 c_5.l(__dczerorl2.o)
0x00000120 0x00000028 Code RO 1680 !!handler_copy c_5.l(__scatter_copy.o)
0x00000148 0x0000002c Code RO 1682 !!handler_zi c_5.l(__scatter_zi.o)
。。。。。。。。。。。。。
。。。。。。。。。。。。。
0x0000071c 0x00000030 Code RO 1380 SYS_INIT sys_ctl.o
0x0000074c 0x00000094 Code RO 94 Vect vectors.o
。。。。。。。。。。。。。
结果我发现Vect还是离INIT很远,我再按如下修改:
LR_IROM1 0x00000020 0x2000000 { ; load region size_region
ER_IROM1 0x00000020 0x2000000 { ; load address = execution address
sys_boot0_start.o (INIT, +First)
}
VECT +0 { //+0表示VECT区紧挨着ER_IROM1区
vectors.o(Vect,+First) //关键就这里在VECT区的第一个.o代码模块即Vect节中添加+First,这表示这个Vect节要放在VECT区的最开始位置
*(InRoot$$Sections)
.ANY (+RO)
}
RW_RAM1 +0 { ; RW_RAM1 start address is after ER_ROM1
.ANY (+RW +ZI)
}
}
生成的map文件有如下内容:
Image Entry point : 0x00000020
Load Region LR_IROM1 (Base: 0x00000020, Size: 0x00004010, Max: 0x02000000, ABSOLUTE, COMPRESSED[0x00003ddc])
Execution Region ER_IROM1 (Base: 0x00000020, Size: 0x00000060, Max: 0x02000000, ABSOLUTE)
Base Addr Size Type Attr Idx E Section Name Object
0x00000020 0x00000060 Code RO 98 * INIT sys_boot0_start.o
Execution Region VECT (Base: 0x00000080, Size: 0x00003cf4, Max: 0xffffffff, ABSOLUTE)
Base Addr Size Type Attr Idx E Section Name Object
0x00000080 0x00000094 Code RO 94 Vect vectors.o
0x00000114 0x00000008 Code RO 1467 * !!!main c_5.l(__main.o)
|
|