Juan Castillo 5ea8aa722d Add NULL pointer check before reading BL32 entry point information ...

BL2 is responsible for loading BL32 and passing a pointer to the
BL32 entrypoint info to BL31 in the BL31 parameters. If no BL32
image is loaded, a NULL pointer is passed. The platform is
responsible for accessing BL31 parameters and extracting the
corresponding BL32 EP info.

In ARM platforms, arm_bl31_early_platform_setup() dereferences the
pointer to the BL32 EP info without checking first if the pointer
is NULL. This will cause an exception if a BL32 entrypoint has not
been populated by BL2. FVP and Juno are not affected because they
always define BL32_BASE, irrespective of whether a BL32 image is
included in the FIP or not.

This patches fixes the issue by checking the BL32 ep_info pointer
before trying to access the data.

If `RESET_TO_BL31` is enabled, the BL32 entrypoint is not
populated if BL32_BASE is not defined.

NOTE: Maintainers of partner platforms should check for this issue
in their ports.

Fixes ARM-software/tf-issues#320

Change-Id: I31456155503f2765766e8b7cd30ab4a40958fb96

2015-11-13 10:51:26 +00:00

..

arm

Add NULL pointer check before reading BL32 entry point information

2015-11-13 10:51:26 +00:00

common

Add optional platform error handler API

2015-10-28 09:13:40 +00:00

compat

PSCI: Implement platform compatibility layer

2015-08-13 20:08:19 +01:00

mediatek

Merge pull request #393 from mtk09422/misc-updates

2015-09-30 11:13:33 +01:00

nvidia/tegra

Tegra: Perform cache maintenance on video carveout memory

2015-09-14 22:09:40 +01:00