arm-trusted-firmware

2792 Commits

5 Branches

114 Tags

55 MiB

Tree: fa05efb3d5

Commit Graph

Author	SHA1	Message	Date
dp-arm	82cb2c1ad9	Use SPDX license identifiers To make software license auditing simpler, use SPDX[0] license identifiers instead of duplicating the license text in every file. NOTE: Files that have been imported by FreeBSD have not been modified. [0]: https://spdx.org/ Change-Id: I80a00e1f641b8cc075ca5a95b10607ed9ed8761a Signed-off-by: dp-arm <dimitris.papastamos@arm.com>	8 years ago
Douglas Raillard	51faada71a	Add support for GCC stack protection Introduce new build option ENABLE_STACK_PROTECTOR. It enables compilation of all BL images with one of the GCC -fstack-protector-* options. A new platform function plat_get_stack_protector_canary() is introduced. It returns a value that is used to initialize the canary for stack corruption detection. Returning a random value will prevent an attacker from predicting the value and greatly increase the effectiveness of the protection. A message is printed at the ERROR level when a stack corruption is detected. To be effective, the global data must be stored at an address lower than the base of the stacks. Failure to do so would allow an attacker to overwrite the canary as part of an attack which would void the protection. FVP implementation of plat_get_stack_protector_canary is weak as there is no real source of entropy on the FVP. It therefore relies on a timer's value, which could be predictable. Change-Id: Icaaee96392733b721fa7c86a81d03660d3c1bc06 Signed-off-by: Douglas Raillard <douglas.raillard@arm.com>	8 years ago

Author

SHA1

Message

Date

dp-arm

82cb2c1ad9

Use SPDX license identifiers

To make software license auditing simpler, use SPDX[0] license
identifiers instead of duplicating the license text in every file.

NOTE: Files that have been imported by FreeBSD have not been modified.

[0]: https://spdx.org/

Change-Id: I80a00e1f641b8cc075ca5a95b10607ed9ed8761a
Signed-off-by: dp-arm <dimitris.papastamos@arm.com>

8 years ago

Douglas Raillard

51faada71a

Add support for GCC stack protection

Introduce new build option ENABLE_STACK_PROTECTOR. It enables
compilation of all BL images with one of the GCC -fstack-protector-*
options.

A new platform function plat_get_stack_protector_canary() is introduced.
It returns a value that is used to initialize the canary for stack
corruption detection. Returning a random value will prevent an attacker
from predicting the value and greatly increase the effectiveness of the
protection.

A message is printed at the ERROR level when a stack corruption is
detected.

To be effective, the global data must be stored at an address
lower than the base of the stacks. Failure to do so would allow an
attacker to overwrite the canary as part of an attack which would void
the protection.

FVP implementation of plat_get_stack_protector_canary is weak as
there is no real source of entropy on the FVP. It therefore relies on a
timer's value, which could be predictable.

Change-Id: Icaaee96392733b721fa7c86a81d03660d3c1bc06
Signed-off-by: Douglas Raillard <douglas.raillard@arm.com>

8 years ago

2 Commits (fa05efb3d58654d0cec707ef1a025f5a24596588)