1. 2. 3. 4. 5. 6. 7. 8. 9. 3.Kernel部分 saved_command_line 这是一个全局变量,在您所需要此参数的driver文件中,extern saved_command_line变量, 通过查找 cus_param 的字符串即可: char * ptr; int cus_param; ptr = strstr(saved_command_line, "cus_param="); ptr += strlen("cus_param...
四、跳转到start_kernel(这也是内核的第一个c函数start_kernel) ldr r13, __switch_data start_kernel 内核的启动流程参照开发手册上面的一幅图 大致总结一下内核的启动流程: arch/am/kernel/head.S start_kernel setup_arch //解析uboot传入的启动参数 setup_command_line(command_line);//解析uboot传入的启动...
strlen += sprintf(commanline, "%s cus_param=%1d", commanline, g_boot_arg->cus_param); //mediatek add 3.Kernel部分 saved_command_line 这是一个全局变量,在您所须要此參数的driver文件里。extern saved_command_line变量。 通过查找 cus_param 的字符串就可以: char * ptr; int cus_param; ptr...
out/host/linux-x86/bin/mkbootimg-msm7627_ffa --kernel out/target/product/msm7627_ffa/kernel --ramdisk out/target/product/msm7627_ffa/ramdisk.img --cmdline "mem=203M console=ttyMSM2,115200n8 androidboot.hardware=qcom" --output out/target/product/msm7627_ffa/boot.img 根据上面的命令我们可以首...
内核部分:Systrace利用了Linux Kernel中的ftrace功能。所以,如果要使用Systrace的话,必须开启kernel中和ftrace相关的模块。 数据采集部分:Android定义了一个Trace类。应用程序可利用该类把统计信息输出给ftrace。同时,Android还有一个atrace程序,它可以从ftrace中读取统计信息然后交给数据分析工具来处理。
int fd = open("/dev/null", O_RDWR); // NOLINT(android-cloexec-open) if (fd == -1) { int saved_errno = errno; android::base::InitLogging(argv, &android::base::KernelLogger, InitAborter); errno = saved_errno; PLOG(FATAL) << "Couldn't open /dev/null"; } dup2(fd, STDIN_...
// properties set in DT always have priority over the command-line ones. process_kernel_dt(); process_kernel_cmdline(); // Propagate the kernel variables to internal variables // used by init as well as the current required properties. ...
// properties set in DT always have priority over the command-line ones. process_kernel_dt(); process_kernel_cmdline(); // Propagate the kernel variables to internal variables // used by init as well as the current required properties. ...
// properties set in DT always have priority over the command-line ones. process_kernel_dt(); process_kernel_cmdline(); // Propagate the kernel variables to internal variables // used by init as well as the current required properties. ...
** appended to the kernel commandline in the tags. ** 5. r0 = 0, r1 = MACHINE_TYPE, r2 = tags_addr ** 6. if second_size != 0: jump to second_addr ** else: jump to kernel_addr */ 关于boot header这个数据结构我们需要重点注意,在这里我们关注其中几个比较重要的值,这些值定义在boot...