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docs:guide-developer:gdb [2018/08/16 11:03] – [Starting GNU Debugger] karlpdocs:guide-developer:gdb [2023/03/09 10:15] (current) – [GNU Debugger] update GDB documnetation link tatami
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 ====== GNU Debugger ====== ====== GNU Debugger ======
-  * **''Note:''** This guide is by no means a Howto, just some short instructions to use GDB on OpenWrt.\\ Please look upstream for multilingual instructions and manuals, like e.g. here: [[http://sourceware.org/gdb/current/onlinedocs/gdb/]]+  * **''Note:''** This guide is by no means a Howto, just some short instructions to use GDB on OpenWrt.\\ Please look upstream for multilingual instructions and manuals, like e.g. here: [[https://sourceware.org/gdb/documentation/]]
  
  
 ===== Compiling Tools ===== ===== Compiling Tools =====
-in [[docs:guide-developer:build-system:use-buildsystem#image_configuration|menuconfig]] enable gdb+in [[docs:guide-developer:toolchain:use-buildsystem#image_configuration|menuconfig]] enable gdb
  
-| Advanced configuration options (for developers) -> Toolchain Options ->  Build gdb |+  Advanced configuration options (for developers) -> Toolchain Options ->  Build gdb
  
 and gdbserver and gdbserver
  
-| Development -> gdbserver |+  Development -> gdbserver
  
  
 ===== Add debugging to a package ===== ===== Add debugging to a package =====
 Add CFLAGS to the package Makefile and recompile it. Add CFLAGS to the package Makefile and recompile it.
-| TARGET_CFLAGS += -ggdb3 |+  TARGET_CFLAGS += -ggdb3
 Alternatively recompile the package with ''CONFIG_DEBUG'' set Alternatively recompile the package with ''CONFIG_DEBUG'' set
-| make package/busybox/{clean,compile} V=s CONFIG_DEBUG=y | +  make package/busybox/{clean,compile} V=s CONFIG_DEBUG=y 
-Or you can enable debug info in [[docs:guide-developer:build-system:use-buildsystem#image_configuration|menuconfig]] +Or you can enable debug info in [[docs:guide-developer:toolchain:use-buildsystem#image_configuration|menuconfig]] 
-| Global build settings > Compile packages with debugging info |+  Global build settings > Compile packages with debugging info
  
 ===== Starting GNU Debugger ===== ===== Starting GNU Debugger =====
 Start gdbserver on target (router) Start gdbserver on target (router)
-| gdbserver :9000 /bin/ping example.org |+  gdbserver :9000 /bin/ping example.org
  
 Start gdb on host (in compiling tree) Start gdb on host (in compiling tree)
-| ./scripts/remote-gdb 192.168.1.1:9000 ./build_dir/target-*/busybox-*/busybox |+  ./scripts/remote-gdb 192.168.1.1:9000 ./build_dir/target-*/busybox-*/busybox
  
 now you have a gdb shell. Set breakpoints, start program, backtrace etc. now you have a gdb shell. Set breakpoints, start program, backtrace etc.
  
-| (gdb) b source-file.c:123 | +  (gdb) b source-file.c:123 
-| (gdb) c | +  (gdb) c 
-| (gdb) bt |+  (gdb) bt
  
 If you want to restart the program, you'll need to set the remote path and arguments If you want to restart the program, you'll need to set the remote path and arguments
  
-| (gdb) set remote exec-file /usr/bin/blah | +  (gdb) set remote exec-file /usr/bin/blah 
-| (gdb) set args -v -x -merry-fishing | +  (gdb) set args -v -x -merry-fishing 
-| (gdb) run |+  (gdb) run
  
  • Last modified: 2018/08/16 11:03
  • by karlp