diff options
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/Kconfig | 19 | ||||
| -rw-r--r-- | arch/arm/Makefile | 7 |
2 files changed, 24 insertions, 2 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index c4d585e2de7..ead6172692d 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -401,6 +401,21 @@ config NO_IDLE_HZ Currently at least OMAP, PXA2xx and SA11x0 platforms are known to have accurate timekeeping with dynamic tick. +config AEABI + bool "Use the ARM EABI to compile the kernel" + help + This option allows for the kernel to be compiled using the latest + ARM ABI (aka EABI). This is only useful if you are using a user + space environment that is also compiled with EABI. + + Since there are major incompatibilities between the legacy ABI and + EABI, especially with regard to structure member alignment, this + option also changes the kernel syscall calling convention to + disambiguate both ABIs and allow for backward compatibility support + (selected with CONFIG_OABI_COMPAT). + + To use this you need GCC version 4.0.0 or later. + config ARCH_DISCONTIGMEM_ENABLE bool default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM) @@ -587,6 +602,7 @@ comment "At least one emulation must be selected" config FPE_NWFPE bool "NWFPE math emulation" + depends on !AEABI ---help--- Say Y to include the NWFPE floating point emulator in the kernel. This is necessary to run most binaries. Linux does not currently @@ -610,7 +626,7 @@ config FPE_NWFPE_XP config FPE_FASTFPE bool "FastFPE math emulation (EXPERIMENTAL)" - depends on !CPU_32v3 && EXPERIMENTAL + depends on !AEABI && !CPU_32v3 && EXPERIMENTAL ---help--- Say Y here to include the FAST floating point emulator in the kernel. This is an experimental much faster emulator which now also has full @@ -642,6 +658,7 @@ source "fs/Kconfig.binfmt" config ARTHUR tristate "RISC OS personality" + depends on !AEABI help Say Y here to include the kernel code necessary if you want to run Acorn RISC OS/Arthur binaries under Linux. This code is still very diff --git a/arch/arm/Makefile b/arch/arm/Makefile index 1fa2a101158..fbfc14a56b9 100644 --- a/arch/arm/Makefile +++ b/arch/arm/Makefile @@ -56,8 +56,13 @@ tune-$(CONFIG_CPU_SA1100) :=-mtune=strongarm1100 tune-$(CONFIG_CPU_XSCALE) :=$(call cc-option,-mtune=xscale,-mtune=strongarm110) -Wa,-mcpu=xscale tune-$(CONFIG_CPU_V6) :=$(call cc-option,-mtune=arm1136j-s,-mtune=strongarm) -# Need -Uarm for gcc < 3.x +ifeq ($(CONFIG_AEABI),y) +CFLAGS_ABI :=-mabi=aapcs -mno-thumb-interwork +else CFLAGS_ABI :=$(call cc-option,-mapcs-32,-mabi=apcs-gnu) $(call cc-option,-mno-thumb-interwork,) +endif + +# Need -Uarm for gcc < 3.x CFLAGS +=$(CFLAGS_ABI) $(arch-y) $(tune-y) $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,)) -msoft-float -Uarm AFLAGS +=$(CFLAGS_ABI) $(arch-y) $(tune-y) -msoft-float |