| 1 | By Lennert Buytenhek <buytenh@wantstofly.org> |
| 2 | Adds support for arm*b-linux* big-endian ARM targets |
| 3 | |
| 4 | See http://gcc.gnu.org/PR16350 |
| 5 | |
| 6 | --- a/gcc/config/arm/linux-elf.h |
| 7 | +++ b/gcc/config/arm/linux-elf.h |
| 8 | @@ -28,19 +28,33 @@ |
| 9 | #undef TARGET_VERSION |
| 10 | #define TARGET_VERSION fputs (" (ARM GNU/Linux with ELF)", stderr); |
| 11 | |
| 12 | +/* |
| 13 | + * 'config.gcc' defines TARGET_BIG_ENDIAN_DEFAULT as 1 for arm*b-* |
| 14 | + * (big endian) configurations. |
| 15 | + */ |
| 16 | +#if TARGET_BIG_ENDIAN_DEFAULT |
| 17 | +#define TARGET_ENDIAN_DEFAULT MASK_BIG_END |
| 18 | +#define TARGET_ENDIAN_OPTION "mbig-endian" |
| 19 | +#define TARGET_LINKER_EMULATION "armelfb_linux" |
| 20 | +#else |
| 21 | +#define TARGET_ENDIAN_DEFAULT 0 |
| 22 | +#define TARGET_ENDIAN_OPTION "mlittle-endian" |
| 23 | +#define TARGET_LINKER_EMULATION "armelf_linux" |
| 24 | +#endif |
| 25 | + |
| 26 | #undef TARGET_DEFAULT_FLOAT_ABI |
| 27 | #define TARGET_DEFAULT_FLOAT_ABI ARM_FLOAT_ABI_HARD |
| 28 | |
| 29 | #undef TARGET_DEFAULT |
| 30 | -#define TARGET_DEFAULT (0) |
| 31 | +#define TARGET_DEFAULT (TARGET_ENDIAN_DEFAULT) |
| 32 | |
| 33 | #define SUBTARGET_CPU_DEFAULT TARGET_CPU_arm6 |
| 34 | |
| 35 | -#define SUBTARGET_EXTRA_LINK_SPEC " -m armelf_linux -p" |
| 36 | +#define SUBTARGET_EXTRA_LINK_SPEC " -m " TARGET_LINKER_EMULATION " -p" |
| 37 | |
| 38 | #undef MULTILIB_DEFAULTS |
| 39 | #define MULTILIB_DEFAULTS \ |
| 40 | - { "marm", "mlittle-endian", "mhard-float", "mno-thumb-interwork" } |
| 41 | + { "marm", TARGET_ENDIAN_OPTION, "mhard-float", "mno-thumb-interwork" } |
| 42 | |
| 43 | /* Now we define the strings used to build the spec file. */ |
| 44 | #undef LIB_SPEC |
| 45 | @@ -65,7 +79,7 @@ |
| 46 | %{rdynamic:-export-dynamic} \ |
| 47 | %{!dynamic-linker:-dynamic-linker " LINUX_TARGET_INTERPRETER "} \ |
| 48 | -X \ |
| 49 | - %{mbig-endian:-EB}" \ |
| 50 | + %{mbig-endian:-EB} %{mlittle-endian:-EL}" \ |
| 51 | SUBTARGET_EXTRA_LINK_SPEC |
| 52 | |
| 53 | #undef LINK_SPEC |
| 54 | --- a/gcc/config.gcc |
| 55 | +++ b/gcc/config.gcc |
| 56 | @@ -672,6 +672,11 @@ arm*-*-netbsd*) |
| 57 | ;; |
| 58 | arm*-*-linux*) # ARM GNU/Linux with ELF |
| 59 | tm_file="dbxelf.h elfos.h linux.h arm/elf.h arm/linux-gas.h arm/linux-elf.h" |
| 60 | + case $target in |
| 61 | + arm*b-*) |
| 62 | + tm_defines="${tm_defines} TARGET_BIG_ENDIAN_DEFAULT=1" |
| 63 | + ;; |
| 64 | + esac |
| 65 | tmake_file="${tmake_file} t-linux arm/t-arm" |
| 66 | case ${target} in |
| 67 | arm*-*-linux-gnueabi | arm*-*-linux-uclibcgnueabi) |
| 68 | --- a/gcc/config/arm/linux-eabi.h |
| 69 | +++ b/gcc/config/arm/linux-eabi.h |
| 70 | @@ -20,6 +20,17 @@ |
| 71 | the Free Software Foundation, 51 Franklin Street, Fifth Floor, |
| 72 | Boston, MA 02110-1301, USA. */ |
| 73 | |
| 74 | +/* |
| 75 | + * 'config.gcc' defines TARGET_BIG_ENDIAN_DEFAULT as 1 for arm*b-* |
| 76 | + * (big endian) configurations. |
| 77 | + */ |
| 78 | +#undef TARGET_LINKER_EMULATION |
| 79 | +#if TARGET_BIG_ENDIAN_DEFAULT |
| 80 | +#define TARGET_LINKER_EMULATION "armelfb_linux_eabi" |
| 81 | +#else |
| 82 | +#define TARGET_LINKER_EMULATION "armelf_linux_eabi" |
| 83 | +#endif |
| 84 | + |
| 85 | /* On EABI GNU/Linux, we want both the BPABI builtins and the |
| 86 | GNU/Linux builtins. */ |
| 87 | #undef TARGET_OS_CPP_BUILTINS |
| 88 | @@ -48,7 +59,7 @@ |
| 89 | #define SUBTARGET_CPU_DEFAULT TARGET_CPU_arm10tdmi |
| 90 | |
| 91 | #undef SUBTARGET_EXTRA_LINK_SPEC |
| 92 | -#define SUBTARGET_EXTRA_LINK_SPEC " -m armelf_linux_eabi" |
| 93 | +#define SUBTARGET_EXTRA_LINK_SPEC " -m " TARGET_LINKER_EMULATION |
| 94 | |
| 95 | /* Use ld-linux.so.3 so that it will be possible to run "classic" |
| 96 | GNU/Linux binaries on an EABI system. */ |
| 97 | --- a/gcc/config/arm/bpabi.h |
| 98 | +++ b/gcc/config/arm/bpabi.h |
| 99 | @@ -33,9 +33,19 @@ |
| 100 | #undef FPUTYPE_DEFAULT |
| 101 | #define FPUTYPE_DEFAULT FPUTYPE_VFP |
| 102 | |
| 103 | +/* |
| 104 | + * 'config.gcc' defines TARGET_BIG_ENDIAN_DEFAULT as 1 for arm*b-* |
| 105 | + * (big endian) configurations. |
| 106 | + */ |
| 107 | +#if TARGET_BIG_ENDIAN_DEFAULT |
| 108 | +#define TARGET_ENDIAN_DEFAULT MASK_BIG_END |
| 109 | +#else |
| 110 | +#define TARGET_ENDIAN_DEFAULT 0 |
| 111 | +#endif |
| 112 | + |
| 113 | /* EABI targets should enable interworking by default. */ |
| 114 | #undef TARGET_DEFAULT |
| 115 | -#define TARGET_DEFAULT MASK_INTERWORK |
| 116 | +#define TARGET_DEFAULT (MASK_INTERWORK | TARGET_ENDIAN_DEFAULT) |
| 117 | |
| 118 | /* The ARM BPABI functions return a boolean; they use no special |
| 119 | calling convention. */ |
| 120 | |
