can not use gdb to debug

[taffychann]

Debugging with debug_qemu() in Scripts/run.sh

In the debug_qemu() function in Scripts/run.sh, the following line is executed:

echo "symbol-file $LEMOND/Kernel/build/kernel.sys" >> $(dirname $(readlink -f "$0"))/debug.gdb

This adds the following line to debug.gdb:

target remote localhost:1234
symbol-file /home/ayumi/LemonOS/Scripts/../Kernel/build/kernel.sys

However, there is no file with the above path.
So, I modified run.sh as follows:

echo "symbol-file $LEMOND/Build/sysroot/system/lemon/kernel.sys" >> $(dirname $(readlink -f "$0"))/debug.gdb

After making this change, when I added some breakpoints and typed c, something went wrong:

CPU does not support SSE4.2. LEMON OS requires x86_64-v2 support.

I then added -cpu host to the qemu-system-x86_64 command in run.sh as follows:

-qemu-system-x86_64 -cpu host

After this change, when I typed c in gdb, the OS ran fine, but I couldn’t set a breakpoint at entry. Although I could set breakpoints at other functions, when I typed c, I received the following warning:

Cannot access memory at address...

[UnmappedStack]

Perhaps debug this with GDB. Oh wait-