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    gdbstub: x86: Switch 64/32 bit registers dynamically · 5f30fa18
    Jan Kiszka 提交于
    Commit 56aebc89 changed gdbstub in way
    that debugging 32 or 16-bit guest code is no longer possible with qemu
    for x86_64 guest CPUs. Since that commit, qemu only provides registers
    sets for 64-bit, forcing current and foreseeable gdb to also switch its
    architecture to 64-bit. And this breaks if the inferior is 32 or 16 bit.
    
    No question, this is a gdb issue. But, as it was confirmed in several
    discusssions with gdb people, it is a non-trivial thing to fix. So until
    qemu finds a gdb version attach with a rework x86 support, we have to
    work around it by switching the register layout as the guest switches
    its execution mode between 16/32 and 64 bit.
    Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com>
    Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
    5f30fa18
cpu.h 26.8 KB