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arch: arm: export entry veneers

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When building a Secure firmware image, instruct the linker to
generate a symbol table with the entry veneers, to allow a Non
Secure firmware image to access Secure Entry functions via the
entry veneers.

Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
This commit is contained in:
Ioannis Glaropoulos 2018-04-12 14:33:52 +02:00 • committed by Anas Nashif
commit f2bdee356b
2 changed files with 26 additions and 0 deletions
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10
arch/arm/core/Kconfig
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@ -123,6 +123,16 @@ config ARM_NSC_REGION_BASE_ADDRESS
a Non-Secure Callable section, depending on the available
security atttribution unit (SAU or IDAU) for a given SOC.
config ARM_ENTRY_VENEERS_LIB_NAME
string "Entry Veneers symbol file"
depends on ARM_FIRMWARE_HAS_SECURE_ENTRY_FUNCS
default "libentryveneers.a"
help
Library file to store the symbol table for
the entry veneers. The library may be used
for building a Non-Secure firmware with
access to Secure Entry functions.
endmenu
menu "Architecture Floating Point Options"

16
arch/arm/core/cortex_m/tz/CMakeLists.txt
View file

@ -2,4 +2,20 @@
# Security Extensions. This option is required when building a Secure firmware.
zephyr_compile_options(-mcmse)
if(CONFIG_ARM_FIRMWARE_HAS_SECURE_ENTRY_FUNCS)
# --out-implib and --cmse-implib instruct the linker to produce
# an import library that consists of a relocatable file containing
# only a symbol table with the entry veneers. The library may be used
# when building a Non-Secure image which shall have access to Secure
# Entry functions.
zephyr_ld_options(
${LINKERFLAGPREFIX},--out-implib=${CONFIG_ARM_ENTRY_VENEERS_LIB_NAME}
)
zephyr_ld_options(
${LINKERFLAGPREFIX},--cmse-implib
)
endif()
zephyr_sources(arm_core_tz.c)