linux.git/arch/powerpc/lib/error-inject.c, branch v5.4.249 Clone of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git powerpc: Add support for function error injection 2018-10-20T02:26:43+00:00 Naveen N. Rao naveen.n.rao@linux.vnet.ibm.com 2018-06-07T09:52:02+00:00 7cd01b08d35f1b7d55686ed8cd57c94d3406ec8f We implement regs_set_return_value() and override_function_with_return() for this purpose. On powerpc, a return from a function (blr) just branches to the location contained in the link register. So, we can just update pt_regs rather than redirecting execution to a dummy function that returns. Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Reviewed-by: Samuel Mendoza-Jonas <sam@mendozajonas.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> 
We implement regs_set_return_value() and override_function_with_return()
for this purpose.

On powerpc, a return from a function (blr) just branches to the location
contained in the link register. So, we can just update pt_regs rather
than redirecting execution to a dummy function that returns.

Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Reviewed-by: Samuel Mendoza-Jonas <sam@mendozajonas.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>