toolchain/gcc/patches/4.1.0/800-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 --- gcc-4.1.0/gcc/config/arm/linux-elf.h
   7 +++ gcc-4.1.0/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_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 --- gcc-4.1.0/gcc/config.gcc
  55 +++ gcc-4.1.0/gcc/config.gcc
  56 @@ -672,6 +672,11 @@
  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)