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@gmx.de

Applied to u-boot/master, thanks!