gdb <executable> gdb --args <executable> arg1 arg2 arg3 gdb -x gdbcommands --init-commands=gdb-openocd.cfg
Add symbols:
symbol-file /mnt/nfs/binary-with-symbols.elf dir /mnt/nfs/src
set print pretty on
Disable Cortex M0 interrupts
set remote hardware-breakpoint-limit 4 set remote hardware-watchpoint-limit 2 define hook-step mon cortex_m maskisr on end define hookpost-step mon cortex_m maskisr off end
set verbose on set auto-load safe-path / set debug auto-load on set sysroot /home/user/prj/buildroot/output/target source ../../interactive/src set substitute-path /usr/sbin/app /apps/app/app add-symbol-file /home/user/prj/stm32/main/bootloader/build/bin/main.elf 0x08005000 dir ../../out/build/app-undefined dir ../../out/build/app-undefined/apps/app dir ../../out/build/app-undefined/apps/app/app set substitute-path /usr/lib ../../out/target/usr/lib set args -m 0 -c /etc/conf.d/conf.xml #sharedlibrary #target extended-remote 192.168.1.62:12345 break myFunction
target extended-remote localhost:2331 #monitor reset monitor halt # Setup GDB FOR FASTER DOWNLOADS #set remote memory-write-packet-size 1024 #set remote memory-write-packet-size fixed
# Add GDB access to mem range where VTOR is located mem 0xE0000000 0xE00FFFFF define bootapp monitor reset halt # Adjust VTOR (Vector table offset register) set {int}0xE000ED08 = &exception_table # Set SP/PC to the values from the actual vector table set $sp = *(int*)&exception_table set $pc = *((int*)(&exception_table)+1) end
Search paths (prefixes):
Translate beginning of paths:
PC is at RTMPCheckEtherType+0x90/0x4d4 [mt7601Uapsta] LR is at RTMPCheckEtherType+0x34/0x4d4 [mt7601Uapsta] Code: e59f3418 e0256593 e2859d43 e289902c (e5d939ba)
Oops occurs at offset 0x90 from RTMPCheckEtherType. 0x4d4 is length. “Code” line shows last instruction. Instruction in bracket is problematic instruction (at RTMPCheckEtherType+0x90)
Disassembly kernel binary or module binary: objdump -dS vmlinux > /tmp/kernel.s and look into generated code.
apt-get install gdb python2.7-dbg
gdb python <pid>
call raise(kernel-thread-id, signo) or call pthread_kill(pthread-thread-id, signo).