User Tools

Site Tools


mywiki:linux:kgdb

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revisionPrevious revision
Next revision
Previous revision
mywiki:linux:kgdb [2021/07/04 10:09] – [Setup] shaoguohmywiki:linux:kgdb [2022/04/02 17:29] (current) – external edit 127.0.0.1
Line 1: Line 1:
 Kernel debugging kgdb Kernel debugging kgdb
  
 +| Reference | [[http://www.yolinux.com/TUTORIALS/GDB-Commands.html|GDB commands]] | [[https://sourceware.org/gdb/onlinedocs/gdb/Symbols.html | Examining Symbol]] |
  
 +Linux Kernel coding style: 
 +  * https://www.kernel.org/doc/html/v5.0/process/coding-style.html
 +  * Documentation/process/coding-style.rst
 +
 +Linux Kernel documentation: for example of linux kernel 5.0
 +  * https://www.kernel.org/doc/html/v5.0/   
 +  * 
 ====== Kernel configure ====== ====== Kernel configure ======
 ===== kgdb内核配置 ===== ===== kgdb内核配置 =====
Line 101: Line 109:
 | Command | Function | | Command | Function |
 | b | Will immediately reboot the system without syncing or unmounting your disks |  | b | Will immediately reboot the system without syncing or unmounting your disks | 
-| c | Will perform a system crash by a NULL pointer dereference |  A crashdump will be taken if configured | +| c | Will perform a system crash by a NULL pointer dereferenceA crashdump will be taken if configured | 
 | d | Shows all locks that are held |  | d | Shows all locks that are held | 
 | e | Send a SIGTERM to all processes, except for init |  | e | Send a SIGTERM to all processes, except for init | 
Line 109: Line 117:
 | i | Send a SIGKILL to all processes, except for init |  | i | Send a SIGKILL to all processes, except for init | 
 | j | Forcibly “Just thaw it” - filesystems frozen by the FIFREEZE ioctl |  | j | Forcibly “Just thaw it” - filesystems frozen by the FIFREEZE ioctl | 
-| k | Secure Access Key (SAK) Kills all programs on the current virtual console |  NOTE: See important comments below in SAK section | +| k | Secure Access Key (SAK) Kills all programs on the current virtual consoleNOTE: See important comments below in SAK section | 
 | l | Shows a stack backtrace for all active CPUs |  | l | Shows a stack backtrace for all active CPUs | 
 | m | Will dump current memory info to your console |  | m | Will dump current memory info to your console | 
Line 123: Line 131:
 | v | Causes ETM buffer dump [ARM-specific] | | v | Causes ETM buffer dump [ARM-specific] |
 | w | Dumps tasks that are in uninterruptable (blocked) state |  | w | Dumps tasks that are in uninterruptable (blocked) state | 
-| x | Used by xmon interface on ppc/powerpc platforms |  Show global PMU Registers on sparc64 |  Dump all TLB entries on MIPS | +| x | Used by xmon interface on ppc/powerpc platformsShow global PMU Registers on sparc64Dump all TLB entries on MIPS | 
 | y | Show global CPU Registers [SPARC-64 specific] | | y | Show global CPU Registers [SPARC-64 specific] |
 | z | Dump the ftrace buffer | | z | Dump the ftrace buffer |
-| 0-9 | Sets the console log level, controlling which kernel messages will be printed to your console. (0, for example would make it so that only emergency messages like PANICs or OOPSes would make it to your console.)+| 0-9 | Sets the console log level, controlling which kernel messages will be printed to your console. (0, for example would make it so that only emergency messages like PANICs or OOPSes would make it to your console.) |
mywiki/linux/kgdb.1625364543.txt.gz · Last modified: (external edit)