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Fail to compile gator driver module

lsy2025

我最近在尝试用Streamline分析汇编代码在Android手机上的执行流水线，看了很多博客以后，逐渐理清楚思路，不知道我理解的对不对？

1. 拉取Linux kernel代码，打开CONFIG_HW_PERF_EVENTS等等

2. 在Linux kernel编译目录下拷贝gator driver源码

3. 修改Makefile

4. 重新编译内核，再编译gator.ko

我在Android手机上使用zcat config.zip | grep 'CONFIG_HW_PERF_EVENTS'等查询现有的内核编译时是否开启了相关配置，Android手机上的内核确实是开启了CONFIG_HW_PERF_EVENTS等，但是没有gator.ko，会导致Streamline连接手机以后，出现下面的warnning提示

"No Perf PMUs detected\n"
"Could not detect any Perf PMUs in /sys/bus/event_source/devices/ but the system contains recognised CPUs. "
"The system may not support perf hardware counters. Check CONFIG_HW_PERF_EVENTS is set and that the PMU is "
"configured in the target device tree."
 
因此我重新编译gator.ko，又出现下面的错误
好像是gator driver里依赖了walk_stackframe内核函数，这个该怎么处理呢？
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  • 0 in reply to Peter Harris

    Thanks for your reply ! However,  when I tried to use Streamline from Arm Mobile Studio for profiling debuggable Application, I got none instruction sample like below

    When I configure counters, it also remind me a warning 

    Should I care about it and How could I get instruction sample ?

Reply
  • 0 in reply to Peter Harris

    Thanks for your reply ! However,  when I tried to use Streamline from Arm Mobile Studio for profiling debuggable Application, I got none instruction sample like below

    When I configure counters, it also remind me a warning 

    Should I care about it and How could I get instruction sample ?

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