• Stafford Horne's avatar
    openrisc: support framepointers and STACKTRACE_SUPPORT · eecac38b
    Stafford Horne authored
    For lockdep support a reliable stack trace mechanism is needed.  This
    patch adds support in OpenRISC for the stacktrace framework, implemented
    by a simple unwinder api.  The unwinder api supports both framepointer
    and basic stack tracing.
    
    The unwinder is now used to replace the stack_dump() implementation as
    well. The new traces are inline with other architectures trace format:
    
     Call trace:
     [<c0004448>] show_stack+0x3c/0x58
     [<c031c940>] dump_stack+0xa8/0xe4
     [<c0008104>] __cpu_up+0x64/0x130
     [<c000d268>] bringup_cpu+0x3c/0x178
     [<c000d038>] cpuhp_invoke_callback+0xa8/0x1fc
     [<c000d680>] cpuhp_up_callbacks+0x44/0x14c
     [<c000e400>] cpu_up+0x14c/0x1bc
     [<c041da60>] smp_init+0x104/0x15c
     [<c033843c>] ? kernel_init+0x0/0x140
     [<c0415e04>] kernel_init_freeable+0xbc/0x25c
     [<c033843c>] ? kernel_init+0x0/0x140
     [<c0338458>] kernel_init+0x1c/0x140
     [<c003a174>] ? schedule_tail+0x18/0xa0
     [<c0006b80>] ret_from_fork+0x1c/0x9c
    Signed-off-by: default avatarStafford Horne <shorne@gmail.com>
    eecac38b
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