FVP: Enable PIE for RESET_TO_BL31=1
This patch enabled PIE for FVP when RESET_TO_BL31=1. The references
to BL31_BASE are replaced by BL31_START as being a symbol exported by
the linker, will create a dynamic relocation entry in .rela.dyn and
hence will be fixed up by dynamic linker at runtime. Also, we disable
RECLAIM_INIT_CODE when PIE is enabled as the init section overlay
creates some static relocations which cannot be handled by the
dynamic linker currently.
Change-Id: I86df1b0a8b2a8bbbe7c3f3c0b9a08c86c2963ec0
Signed-off-by: Soby Mathew <soby.mathew@arm.com>
diff --git a/plat/arm/common/arm_bl31_setup.c b/plat/arm/common/arm_bl31_setup.c
index 24d5570..1b05f46 100644
--- a/plat/arm/common/arm_bl31_setup.c
+++ b/plat/arm/common/arm_bl31_setup.c
@@ -25,11 +25,13 @@
static entry_point_info_t bl32_image_ep_info;
static entry_point_info_t bl33_image_ep_info;
+#if !RESET_TO_BL31
/*
* Check that BL31_BASE is above ARM_TB_FW_CONFIG_LIMIT. The reserved page
* is required for SOC_FW_CONFIG/TOS_FW_CONFIG passed from BL2.
*/
CASSERT(BL31_BASE >= ARM_TB_FW_CONFIG_LIMIT, assert_bl31_base_overflows);
+#endif
/* Weak definitions may be overridden in specific ARM standard platform */
#pragma weak bl31_early_platform_setup2
@@ -38,8 +40,8 @@
#pragma weak bl31_plat_get_next_image_ep_info
#define MAP_BL31_TOTAL MAP_REGION_FLAT( \
- BL31_BASE, \
- BL31_END - BL31_BASE, \
+ BL31_START, \
+ BL31_END - BL31_START, \
MT_MEMORY | MT_RW | MT_SECURE)
#if RECLAIM_INIT_CODE
IMPORT_SYM(unsigned long, __INIT_CODE_START__, BL_INIT_CODE_BASE);