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  • Andrew Jones's avatar
    arm/arm64: maintain per thread exception handlers · ad14f089
    Andrew Jones authored
    Add exception handlers to thread info. And, since we allow threads
    running in user mode to install exception handlers too (a convenience
    for unit test developers), check for handlers on the user mode stack
    thread info too. But, unit test developers will likely also expect the
    installation of exception handlers done in kernel mode, before switching
    to user mode, to work. So, if there's no handler in the thread info
    hanging off the user mode stack, then still check the kernel mode stack
    thread info for one.
    Use THREAD_SIZE == PAGE_SIZE, when PAGE_SIZE is larger than 16K.
    This is for arm64, which uses 64K pages, because the exception
    handler arrays are 8K together, making the stack too small with
    THREAD_SIZE == 16K.
    Signed-off-by: default avatarAndrew Jones <>
    Signed-off-by: default avatarMarcelo Tosatti <>