The reset vector is 16-bit real mode, so you have the debugger in the wrong mode. The code should transition to 32 bit protected early in the flow.
Sent from my iPhone > On Aug 3, 2017, at 7:47 PM, wang xiaofeng <[email protected]> wrote: > > Hello, > I am tring to add my own SEC code base on OVMF and run on QEMU. Since > the code cannot run I need to step to step trace the assembly code . > The hang point is very early before I can use either UDK or debug serial > output. I tried to use gdb to connect to QEMU.I start gdb in another > terminal, and issue the following commands: > (gdb) set architecture i386:x86-64:intel > (gdb) target remote localhost:1234 > It really stops at the bios first instruction at 0XFFFFFFF0. But gdb shows > eip= 0xFFF0 and CS=0xF000(why it not be 0xfff0). After I trigger the command > "display /i $pc" > It shows the assembly code in 0xFFF0 instead of 0XFFFFFFF0, so the > information is incorrect. > Anyone knows how to corrently debug the SEC code ? Other debug tool is also > ok. > Thanks in advance! > > > > _______________________________________________ > edk2-devel mailing list > [email protected] > https://lists.01.org/mailman/listinfo/edk2-devel _______________________________________________ edk2-devel mailing list [email protected] https://lists.01.org/mailman/listinfo/edk2-devel
