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- By Lennert Buytenhek <buytenh@wantstofly.org>
- Adds support for arm*b-linux* big-endian ARM targets
- See http://gcc.gnu.org/PR16350
- Index: gcc-4.1.1/gcc/config/arm/linux-elf.h
- ===================================================================
- --- gcc-4.1.1.orig/gcc/config/arm/linux-elf.h
- +++ gcc-4.1.1/gcc/config/arm/linux-elf.h
- @@ -28,19 +28,33 @@
- #undef TARGET_VERSION
- #define TARGET_VERSION fputs (" (ARM GNU/Linux with ELF)", stderr);
-
- +/*
- + * 'config.gcc' defines TARGET_BIG_ENDIAN_DEFAULT as 1 for arm*b-*
- + * (big endian) configurations.
- + */
- +#if TARGET_BIG_ENDIAN_DEFAULT
- +#define TARGET_ENDIAN_DEFAULT MASK_BIG_END
- +#define TARGET_ENDIAN_OPTION "mbig-endian"
- +#define TARGET_LINKER_EMULATION "armelfb_linux"
- +#else
- +#define TARGET_ENDIAN_DEFAULT 0
- +#define TARGET_ENDIAN_OPTION "mlittle-endian"
- +#define TARGET_LINKER_EMULATION "armelf_linux"
- +#endif
- +
- #undef TARGET_DEFAULT_FLOAT_ABI
- #define TARGET_DEFAULT_FLOAT_ABI ARM_FLOAT_ABI_HARD
-
- #undef TARGET_DEFAULT
- -#define TARGET_DEFAULT (0)
- +#define TARGET_DEFAULT (TARGET_ENDIAN_DEFAULT)
-
- #define SUBTARGET_CPU_DEFAULT TARGET_CPU_arm6
-
- -#define SUBTARGET_EXTRA_LINK_SPEC " -m armelf_linux -p"
- +#define SUBTARGET_EXTRA_LINK_SPEC " -m " TARGET_LINKER_EMULATION " -p"
-
- #undef MULTILIB_DEFAULTS
- #define MULTILIB_DEFAULTS \
- - { "marm", "mlittle-endian", "mhard-float", "mno-thumb-interwork" }
- + { "marm", TARGET_ENDIAN_OPTION, "mhard-float", "mno-thumb-interwork" }
-
- /* Now we define the strings used to build the spec file. */
- #undef LIB_SPEC
- @@ -61,7 +75,7 @@
- %{rdynamic:-export-dynamic} \
- %{!dynamic-linker:-dynamic-linker " LINUX_TARGET_INTERPRETER "} \
- -X \
- - %{mbig-endian:-EB}" \
- + %{mbig-endian:-EB} %{mlittle-endian:-EL}" \
- SUBTARGET_EXTRA_LINK_SPEC
-
- #undef LINK_SPEC
- Index: gcc-4.1.1/gcc/config.gcc
- ===================================================================
- --- gcc-4.1.1.orig/gcc/config.gcc
- +++ gcc-4.1.1/gcc/config.gcc
- @@ -672,6 +672,11 @@ arm*-*-netbsd*)
- ;;
- arm*-*-linux*) # ARM GNU/Linux with ELF
- tm_file="dbxelf.h elfos.h linux.h arm/elf.h arm/linux-gas.h arm/linux-elf.h"
- + case $target in
- + arm*b-*)
- + tm_defines="${tm_defines} TARGET_BIG_ENDIAN_DEFAULT=1"
- + ;;
- + esac
- tmake_file="${tmake_file} t-linux arm/t-arm"
- case ${target} in
- arm*-*-linux-gnueabi)
- Index: gcc-4.1.1/gcc/config/arm/linux-eabi.h
- ===================================================================
- --- gcc-4.1.1.orig/gcc/config/arm/linux-eabi.h
- +++ gcc-4.1.1/gcc/config/arm/linux-eabi.h
- @@ -20,6 +20,17 @@
- the Free Software Foundation, 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA. */
-
- +/*
- + * 'config.gcc' defines TARGET_BIG_ENDIAN_DEFAULT as 1 for arm*b-*
- + * (big endian) configurations.
- + */
- +#undef TARGET_LINKER_EMULATION
- +#if TARGET_BIG_ENDIAN_DEFAULT
- +#define TARGET_LINKER_EMULATION "armelfb_linux_eabi"
- +#else
- +#define TARGET_LINKER_EMULATION "armelf_linux_eabi"
- +#endif
- +
- /* On EABI GNU/Linux, we want both the BPABI builtins and the
- GNU/Linux builtins. */
- #undef TARGET_OS_CPP_BUILTINS
- @@ -48,7 +59,7 @@
- #define SUBTARGET_CPU_DEFAULT TARGET_CPU_arm10tdmi
-
- #undef SUBTARGET_EXTRA_LINK_SPEC
- -#define SUBTARGET_EXTRA_LINK_SPEC " -m armelf_linux_eabi"
- +#define SUBTARGET_EXTRA_LINK_SPEC " -m " TARGET_LINKER_EMULATION
-
- /* Use ld-linux.so.3 so that it will be possible to run "classic"
- GNU/Linux binaries on an EABI system. */
- Index: gcc-4.1.1/gcc/config/arm/bpabi.h
- ===================================================================
- --- gcc-4.1.1.orig/gcc/config/arm/bpabi.h
- +++ gcc-4.1.1/gcc/config/arm/bpabi.h
- @@ -33,9 +33,19 @@
- #undef FPUTYPE_DEFAULT
- #define FPUTYPE_DEFAULT FPUTYPE_VFP
-
- +/*
- + * 'config.gcc' defines TARGET_BIG_ENDIAN_DEFAULT as 1 for arm*b-*
- + * (big endian) configurations.
- + */
- +#if TARGET_BIG_ENDIAN_DEFAULT
- +#define TARGET_ENDIAN_DEFAULT MASK_BIG_END
- +#else
- +#define TARGET_ENDIAN_DEFAULT 0
- +#endif
- +
- /* EABI targets should enable interworking by default. */
- #undef TARGET_DEFAULT
- -#define TARGET_DEFAULT MASK_INTERWORK
- +#define TARGET_DEFAULT (MASK_INTERWORK | TARGET_ENDIAN_DEFAULT)
-
- /* The ARM BPABI functions return a boolean; they use no special
- calling convention. */
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