[U-Boot] [PATCH 1/1] arm64: print instructions leading to exception

[Tom Rini]

On Thu, Sep 12, 2019 at 07:09:26PM +0200, Heinrich Schuchardt wrote:

> If an exception occurs in a loaded image and the relocation offset is
> unknown, it is helpful to know the instructions pointed to by the
> program counter. This patch adds the missing output.
> 
> A possible output is:
>     Code: 910c4021 aa1303e0 f9400662 d63f0040 (e7f7defb)
> 
> The parentheses indicate the instruction causing the exception.
> 
> The output can be disassembled using scripts/decodecode:
> 
> echo 'Code: 90000360 9100b800 94002782 17ffff8f (e7f7defb)' | \
>   ARCH=arm64 scripts/decodecode
> 
> Code: 90000360 9100b800 94002782 17ffff8f (e7f7defb)
> All code
> ========
>    0:   90000360    adrp    x0, 0x6c000
>    4:   9100b800    add     x0, x0, #0x2e
>    8:   94002782    bl      0x9e10
>    c:   17ffff8f    b       0xfffffffffffffe48
>   10:*  e7f7defb    .inst   0xe7f7defb ; undefined <-- trapping instruction
> 
> Code starting with the faulting instruction
> ===========================================
>    0:   e7f7defb    .inst   0xe7f7defb ; undefined
> 
> We already have implemented the same for armv7.
> 
> For testing command 'exception undefined' can be used.
> 
> Signed-off-by: Heinrich Schuchardt <xypron.glpk at gmx.de>

Applied to u-boot/master, thanks!

-- 
Tom
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