powerpc: Add emulation for the addpcis instruction

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The addpcis instruction puts the sum of the next instruction address
plus a constant into a register.  Since the result depends on the
address of the instruction, it will give an incorrect result if it
is single-stepped out of line, which is what the *probes subsystem
will currently do if a probe is placed on an addpcis instruction.
This fixes the problem by adding emulation of it to analyse_instr().

Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

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Paul Mackerras 2017-08-30 14:12:31 +10:00 • committed by Michael Ellerman

parent 5762e08344

commit 958465ee54

1 changed files with 11 additions and 3 deletions

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arch/powerpc/lib/sstep.c

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