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    microblaze: Add KGDB support · 2d5973cb
    Michal Simek 提交于
    Kgdb uses brki r16, 0x18 instruction to call
    low level _debug_exception function which save
    current state to pt_regs and call microblaze_kgdb_break
    function. _debug_exception should be called only from
    the kernel space. User space calling is not supported
    because user application debugging uses different handling.
    
    pt_regs_to_gdb_regs loads additional special registers
    which can't be changed
    
     * Enable KGDB in Kconfig
     * Remove ancient not-tested KGDB support
     * Remove ancient _debug_exception code from entry.S
    
    Only MMU KGDB support is supported.
    Signed-off-by: NMichal Simek <monstr@monstr.eu>
    CC: Jason Wessel <jason.wessel@windriver.com>
    CC: John Williams <john.williams@petalogix.com>
    CC: Edgar E. Iglesias <edgar.iglesias@petalogix.com>
    CC: linux-kernel@vger.kernel.org
    Acked-by: NJason Wessel <jason.wessel@windriver.com>
    2d5973cb
Kconfig 6.6 KB