| 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 | diff -urN gcc-3.4.1-dist/gcc/config/arm/linux-elf.h gcc-3.4.1/gcc/config/arm/linux-elf.h |
| 7 | --- gcc-3.4.1-dist/gcc/config/arm/linux-elf.h 2004-08-16 16:01:50.000000000 -0500 |
| 8 | +++ gcc-3.4.1/gcc/config/arm/linux-elf.h 2004-08-16 15:43:40.000000000 -0500 |
| 9 | @@ -30,17 +30,34 @@ |
| 10 | /* Do not assume anything about header files. */ |
| 11 | #define NO_IMPLICIT_EXTERN_C |
| 12 | |
| 13 | +/* |
| 14 | + * 'config.gcc' defines TARGET_BIG_ENDIAN_DEFAULT as 1 for arm*b-* |
| 15 | + * (big endian) configurations. |
| 16 | + */ |
| 17 | +#if TARGET_BIG_ENDIAN_DEFAULT |
| 18 | +#define TARGET_ENDIAN_DEFAULT ARM_FLAG_BIG_END |
| 19 | +#define TARGET_ENDIAN_OPTION "mbig-endian" |
| 20 | +#define TARGET_LINKER_EMULATION "armelfb_linux" |
| 21 | +#else |
| 22 | +#define TARGET_ENDIAN_DEFAULT 0 |
| 23 | +#define TARGET_ENDIAN_OPTION "mlittle-endian" |
| 24 | +#define TARGET_LINKER_EMULATION "armelf_linux" |
| 25 | +#endif |
| 26 | + |
| 27 | /* Default is to use APCS-32 mode. */ |
| 28 | #undef TARGET_DEFAULT |
| 29 | -#define TARGET_DEFAULT (ARM_FLAG_APCS_32 | ARM_FLAG_MMU_TRAPS) |
| 30 | +#define TARGET_DEFAULT \ |
| 31 | + ( ARM_FLAG_APCS_32 | \ |
| 32 | + ARM_FLAG_MMU_TRAPS | \ |
| 33 | + TARGET_ENDIAN_DEFAULT ) |
| 34 | |
| 35 | #define SUBTARGET_CPU_DEFAULT TARGET_CPU_arm6 |
| 36 | |
| 37 | -#define SUBTARGET_EXTRA_LINK_SPEC " -m armelf_linux -p" |
| 38 | +#define SUBTARGET_EXTRA_LINK_SPEC " -m " TARGET_LINKER_EMULATION " -p" |
| 39 | |
| 40 | #undef MULTILIB_DEFAULTS |
| 41 | #define MULTILIB_DEFAULTS \ |
| 42 | - { "marm", "mlittle-endian", "mhard-float", "mapcs-32", "mno-thumb-interwork" } |
| 43 | + { "marm", TARGET_ENDIAN_OPTION, "mhard-float", "mapcs-32", "mno-thumb-interwork" } |
| 44 | |
| 45 | #define CPP_APCS_PC_DEFAULT_SPEC "-D__APCS_32__" |
| 46 | |
| 47 | @@ -101,7 +118,7 @@ |
| 48 | %{rdynamic:-export-dynamic} \ |
| 49 | %{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.2} \ |
| 50 | -X \ |
| 51 | - %{mbig-endian:-EB}" \ |
| 52 | + %{mbig-endian:-EB} %{mlittle-endian:-EL}" \ |
| 53 | SUBTARGET_EXTRA_LINK_SPEC |
| 54 | #endif |
| 55 | |
| 56 | diff -urN gcc-3.4.1-dist/gcc/config.gcc gcc-3.4.1/gcc/config.gcc |
| 57 | --- gcc-3.4.1-dist/gcc/config.gcc 2004-08-16 16:01:50.000000000 -0500 |
| 58 | +++ gcc-3.4.1/gcc/config.gcc 2004-08-16 16:01:25.000000000 -0500 |
| 59 | @@ -672,6 +672,11 @@ |
| 60 | ;; |
| 61 | arm*-*-linux*) # ARM GNU/Linux with ELF |
| 62 | tm_file="dbxelf.h elfos.h linux.h arm/elf.h arm/linux-gas.h arm/linux-elf.h arm/aout.h arm/arm.h" |
| 63 | + case $target in |
| 64 | + arm*b-*) |
| 65 | + tm_defines="TARGET_BIG_ENDIAN_DEFAULT=1 $tm_defines" |
| 66 | + ;; |
| 67 | + esac |
| 68 | tmake_file="t-slibgcc-elf-ver t-linux arm/t-linux" |
| 69 | extra_parts="crtbegin.o crtbeginS.o crtend.o crtendS.o" |
| 70 | gnu_ld=yes |
| 71 | |
