diff options
Diffstat (limited to 'arch/arm/Kconfig')
| -rw-r--r-- | arch/arm/Kconfig | 37 |
1 files changed, 36 insertions, 1 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 3cfd82a05b2..5959e36c3b4 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -180,6 +180,7 @@ config ARCH_OMAP config ARCH_VERSATILE bool "Versatile" select ARM_AMBA + select ARM_VIC select ICST307 help This enables support for ARM Ltd Versatile board. @@ -400,6 +401,38 @@ 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 OABI_COMPAT + bool "Allow old ABI binaries to run with this kernel" + depends on AEABI + default y + help + This option preserves the old syscall interface along with the + new (ARM EABI) one. It also provides a compatibility layer to + intercept syscalls that have structure arguments which layout + in memory differs between the legacy ABI and the new ARM EABI + (only for non "thumb" binaries). This option adds a tiny + overhead to all syscalls and produces a slightly larger kernel. + If you know you'll be using only pure EABI user space then you + can say N here. If this option is not selected and you attempt + to execute a legacy ABI binary then the result will be + UNPREDICTABLE (in fact it can be predicted that it won't work + at all). If in doubt say Y. + config ARCH_DISCONTIGMEM_ENABLE bool default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM) @@ -586,6 +619,7 @@ comment "At least one emulation must be selected" config FPE_NWFPE bool "NWFPE math emulation" + depends on !AEABI || OABI_COMPAT ---help--- Say Y to include the NWFPE floating point emulator in the kernel. This is necessary to run most binaries. Linux does not currently @@ -609,7 +643,7 @@ config FPE_NWFPE_XP config FPE_FASTFPE bool "FastFPE math emulation (EXPERIMENTAL)" - depends on !CPU_32v3 && EXPERIMENTAL + depends on (!AEABI || OABI_COMPAT) && !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 @@ -641,6 +675,7 @@ 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 |