commit f68d22e8796524f36acf9feb6ffcc16cb1fc75d2
author Michalis Pappas <mpappas@fastmail.fm> Tue Mar 20 14:30:00 2018 +0800
committer Michalis Pappas <mpappas@fastmail.fm> Tue Mar 20 14:35:47 2018 +0800
tree f055f0739e6f619625ac4e571541a1fec36908d7
parent fb45044bc567b96e8be243b717ec2920224cd9b9

qemu: Add support for stack canary protection

Allow qemu users to enable stack protection. Since the virt platform
does not provide an RNG, use a basic, timer-based, canary generation,
similarly to FVP.

Increase SRAM size and BL2 size to fit images when stack protection is
enabled.

Notice that stack protection is not enabled by default in qemu.

Fixes ARM-software/tf-issues#568

Signed-off-by: Michalis Pappas <mpappas@fastmail.fm>

plat/qemu/platform.mk

diff --git a/plat/qemu/platform.mk b/plat/qemu/platform.mk
index 5bfd48a..e11f504 100644
--- a/plat/qemu/platform.mk
+++ b/plat/qemu/platform.mk
@@ -168,6 +168,10 @@
 endif
 
 SEPARATE_CODE_AND_RODATA := 1
+ENABLE_STACK_PROTECTOR	 := 0
+ifneq ($(ENABLE_STACK_PROTECTOR), 0)
+	PLAT_BL_COMMON_SOURCES += plat/qemu/qemu_stack_protector.c
+endif
 
 # Disable the PSCI platform compatibility layer
 ENABLE_PLAT_COMPAT	:= 	0