A method of printing user state segment error message under Linux

Citation: Vedon Embedded Video Phase 31st Section 3rd _ Application Debug Configuration Modify kernel Print user state segment error message _p "6th minute.

1. Configure the kernel support Debug_user (tick Kernel hacking, Verbose USER fault messages[*] (Video section 8:23)

2. Set Bootargs, add parameter User_debug = 0xFF. User_debug each of the representatives to set different modes, the specific mode can refer to the file: Include/asm-arm/system.h under the udbg_xxx.

If a program with a segment error is executed, a detailed error message is printed.

You can locate the wrong location based on PC values and individual register values.

First disassembly of the problem application: arm-linux-objdump-d FileName > Anotherfile

Then open anotherfile to view disassembly and locate the instructions at the PC value.

Report:

View the address range of the system call function: View the file System.map.

View the address of a function in the current system: View/proc/kallsyms file (large file, preferably relocated to file before viewing)

View function Call Order: Strace-o xxxfile./xxx and then view Xxxfile

A method of printing user state segment error message under Linux