2.5.3 rel.dyn段重定位 编译uboot使用“-pie”选项以后会生成一个.rel.dyn 段,需要对这个段进行重定位和拷贝: 94-97行,从.rel.dyn 段开始,每次读取两个4字节的数据存放到r0和r1寄存器中,r0存放低4字节的数据,也就是 Label 地址;r1存放高4字节的数据,也就是 Label 标志。 第98行,取r1的低8位。 第99...
本系列教程以「i.MX6ULL」处理器的ARM开发板为实验基础,学习记录嵌入式Linux开发的各种知识与经验,主要内容包括嵌入式Linux移植,嵌入式Linux驱动开发,嵌入式Linux应用开发等。 本系列教程将以野火的i.MX6ULL eMMC开发板为硬件基础,以「野火EBF6ULL Pro开发板教程」和「正点原子i.MX6ULL阿尔法开发板教程」为参考,进行...
"ip=dhcp nfsroot=${serverip}:${nfsroot},v3,tcp\0"\ "netboot=echo Booting from net ...; "\ "run netargs; "\ "if test ${ip_dyn} = yes; then "\ "setenv get_cmd dhcp; "\ "else "\ "setenv get_cmd tftp; "\ "fi; "\ "${get_cmd} ${loadaddr} ${image}; "\ "if ...
{console} " \ "root=/dev/nfs " \ "ip=dhcp nfsroot=${serverip}:${nfsroot},v3,tcp\0" \ "netboot=echo Booting from net ...; " \ "run netargs; " \ "if test ${ip_dyn} = yes; then " \ "setenv get_cmd dhcp; " \ "else " \ "setenv get_cmd tftp; " \ "fi; " ...
"if test ${ip_dyn} = yes; then " \ "setenv get_cmd dhcp; " \ "else " \ "setenv get_cmd tftp; " \ "fi; " \ "${get_cmd} ${image}; " \ "if test ${boot_fdt} = yes || test ${boot_fdt} = try; then " \ "if ${get_cmd} ${fdt_addr} ${fdt_file}; then "...
netboot=echo Booting from net ...; run netargs; if test ${ip_dyn} = yes; then setenv get_cmd dhcp; else setenv get_cmd tftp; fi; ${get_cmd} ${imag}; if test ${boot_fdt} = yes || test ${boot_fdt} = try; then if ${get_cmd} ${fdt_addr} ${fdt_file}; then bootz...
netboot=echo Booting from net ...; run netargs; if test ${ip_dyn} = yes; then setenv get_cmd dhcp; else setenv get_cmd tftp; fi; ${get_cmd} ${imag}; if test ${boot_fdt} = yes || test ${boot_fdt} = try; then if ${get_cmd} ${fdt_addr} ${fdt_file}; then bootz...
可以看到,uboot编译出的可执行程序中,最开始放置的还是中断向量表(vectors),第一行代码为 _start 函数,地址在0x87800000处,并把此地址作为起始地址赋给 __image_copy_start 变量用于镜像拷贝。 二、_start 函数 map文件中给出了 _start 函数在 arch/arm/lib 下面,搜索一下...
setenv serverip 192.168.6.186 ;虚拟机的ip setenv gatewayip 192.168.1.1 ;网关 saveenv ;保存配置 加载内核和设备树setenv bootcmd tftp 41000000 uImage;tftp 42000000 exynos4412-fs4412.dtb;bootm 41000000 - 42000000 bootcmd:uboot2启动之后,首先先执行找到这个参数,执行后面的命令。
netboot=echo Booting from net ...; run netargs; if test ${ip_dyn} = yes; then setenv get_cmd dhcp; else setenv get_cmdtftp; fi; ${get_cmd} ${loadaddr} ${image}; if test ${boot_fdt} = yes || test ${boot_fdt} = try; then if ${get_cmd} ${fdt_addr} ${fdt_file}...