toolchain/gcc/patches/llvm/800-arm-bigendian.patch

   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 @@ -61,7 +75,7 @@
  46     %{rdynamic:-export-dynamic} \
  47     %{!dynamic-linker:-dynamic-linker " LINUX_DYNAMIC_LINKER "} \
  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 @@ -764,6 +764,11 @@ arm*-*-linux*)                     # ARM GNU/Linux with EL
  57         tm_file="dbxelf.h elfos.h linux.h arm/elf.h arm/linux-gas.h arm/linux-elf.h"
  58         tmake_file="${tmake_file} t-linux arm/t-arm"
  59         case ${target} in
  60 +       arm*b-*)
  61 +               tm_defines="${tm_defines} TARGET_BIG_ENDIAN_DEFAULT=1"
  62 +               ;;
  63 +       esac
  64 +       case ${target} in
  65         arm*-*-linux-*eabi)
  66             tm_file="$tm_file arm/bpabi.h arm/linux-eabi.h"
  67             tmake_file="$tmake_file arm/t-arm-elf arm/t-bpabi arm/t-linux-eabi"