Lines Matching refs:registers

5 | Title          | Not saving x0 to x3 registers can leak information from one |
28 into the firmware. However, for an SMC exception, the general purpose registers
32 caller in registers ``x0`` to ``x3``. In TF-A, these return values are written
37 called. It restores the values of all general purpose registers taken from the
38 CPU context stored on the stack. This includes registers ``x0`` to ``x3``, as
45      * This function restores all general purpose registers except x30 from the
75 SMCs it would need to be aware of which return registers contain valid data, so
76 it can sanitise any unused return registers. On the other hand, mitigating this
78 information is leaked through registers ``x0`` to ``x3``, by preserving the
82 ``SP_MIN`` already saves all general purpose registers - including ``r0`` to
89      * Macro to save the General purpose registers (r0 - r12), the banked
90      * spsr, lr, sp registers and the `scr` register to the SMC context on entry