Hello!
On 16.11.2020 8:03, Tiezhu Yang wrote:
Select ARCH_WANT_FRAME_POINTERS to fix the following build error under
CONFIG_DEBUG_ATOMIC_SLEEP:
CC arch/mips/kernel/signal.o
{standard input}: Assembler messages:
{standard input}:1775: Error: Unable to parse register name $fp
scripts/Makefile.build:283: recipe for target 'arch/mips/kernel/signal.o' failed
make[2]: *** [arch/mips/kernel/signal.o] Error 1
scripts/Makefile.build:500: recipe for target 'arch/mips/kernel' failed
make[1]: *** [arch/mips/kernel] Error 2
Makefile:1799: recipe for target 'arch/mips' failed
make: *** [arch/mips] Error 2
I think it is useful to get debugging information as described in the
following texts:
lib/Kconfig.debug
config FRAME_POINTER
bool "Compile the kernel with frame pointers"
...
default y if (DEBUG_INFO && UML) || ARCH_WANT_FRAME_POINTERS
help
If you say Y here the resulting kernel image will be slightly
larger and slower, but it gives very useful debugging information
in case of kernel bugs. (precise oopses/stacktraces/warnings)
Documentation/dev-tools/kgdb.rst
This option inserts code to into the compiled executable which saves
So to or into? :-)
the frame information in registers or on the stack at different points
which allows a debugger such as gdb to more accurately construct stack
back traces while debugging the kernel.
Signed-off-by: Tiezhu Yang <yangtiezhu@xxxxxxxxxxx>
[...]
MBR, Sergei
