arch/arm64: Enable 'large' code model for large targets
Targets with text or data addresses above the 4GB boundary may need to use
the large code model to ensure relocations in the linker work correctly.
Signed-off-by: Keith Packard <keithp@keithp.com>
diff --git a/arch/arm64/core/CMakeLists.txt b/arch/arm64/core/CMakeLists.txt
index da6e3b1..143d108 100644
--- a/arch/arm64/core/CMakeLists.txt
+++ b/arch/arm64/core/CMakeLists.txt
@@ -15,6 +15,18 @@
vector_table.S
)
+# Use large code model for addresses larger than 32 bits,
+# This is 10 characters long (0x12345678). We can't use a
+# simple numeric comparison because these values may be
+# beyond the numeric range of integers for cmake.
+
+string(LENGTH "x${CONFIG_SRAM_BASE_ADDRESS}" SRAM_LENGTH)
+string(LENGTH "x${CONFIG_KERNEL_VM_BASE}" KERNEL_VM_LENGTH)
+
+if(${SRAM_LENGTH} GREATER 11 OR ${KERNEL_VM_LENGTH} GREATER 11)
+ zephyr_cc_option(-mcmodel=large)
+endif()
+
zephyr_library_sources_ifdef(CONFIG_FPU_SHARING fpu.c fpu.S)
zephyr_library_sources_ifdef(CONFIG_ARM_MMU mmu.c mmu.S)
zephyr_library_sources_ifdef(CONFIG_ARM_MPU cortex_r/arm_mpu.c)
