toolchain/gcc/patches/4.2.3/800-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 Index: gcc-4.2.3/gcc/config/arm/linux-elf.h
   7 ===================================================================
   8 --- gcc-4.2.3.orig/gcc/config/arm/linux-elf.h   2007-09-01 17:28:30.000000000 +0200
   9 +++ gcc-4.2.3/gcc/config/arm/linux-elf.h        2008-05-21 13:45:53.349289241 +0200
  10 @@ -27,19 +27,33 @@
  11  #undef  TARGET_VERSION
  12  #define TARGET_VERSION  fputs (" (ARM GNU/Linux with ELF)", stderr);
  13
  14 +/*
  15 + * 'config.gcc' defines TARGET_BIG_ENDIAN_DEFAULT as 1 for arm*b-*
  16 + * (big endian) configurations.
  17 + */
  18 +#if TARGET_BIG_ENDIAN_DEFAULT
  19 +#define TARGET_ENDIAN_DEFAULT MASK_BIG_END
  20 +#define TARGET_ENDIAN_OPTION "mbig-endian"
  21 +#define TARGET_LINKER_EMULATION "armelfb_linux"
  22 +#else
  23 +#define TARGET_ENDIAN_DEFAULT 0
  24 +#define TARGET_ENDIAN_OPTION "mlittle-endian"
  25 +#define TARGET_LINKER_EMULATION "armelf_linux"
  26 +#endif
  27 +
  28  #undef  TARGET_DEFAULT_FLOAT_ABI
  29  #define TARGET_DEFAULT_FLOAT_ABI ARM_FLOAT_ABI_HARD
  30
  31  #undef  TARGET_DEFAULT
  32 -#define TARGET_DEFAULT (0)
  33 +#define TARGET_DEFAULT (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", "mno-thumb-interwork" }
  43 +       { "marm", TARGET_ENDIAN_OPTION, "mhard-float", "mno-thumb-interwork" }
  44
  45  /* Now we define the strings used to build the spec file.  */
  46  #undef  LIB_SPEC
  47 @@ -60,7 +74,7 @@
  48     %{rdynamic:-export-dynamic} \
  49     %{!dynamic-linker:-dynamic-linker " LINUX_DYNAMIC_LINKER "} \
  50     -X \
  51 -   %{mbig-endian:-EB}" \
  52 +   %{mbig-endian:-EB} %{mlittle-endian:-EL}" \
  53     SUBTARGET_EXTRA_LINK_SPEC
  54
  55  #undef  LINK_SPEC
  56 Index: gcc-4.2.3/gcc/config.gcc
  57 ===================================================================
  58 --- gcc-4.2.3.orig/gcc/config.gcc       2008-05-21 13:45:43.333288320 +0200
  59 +++ gcc-4.2.3/gcc/config.gcc    2008-05-21 13:45:53.353287795 +0200
  60 @@ -708,6 +708,11 @@
  61         tm_file="dbxelf.h elfos.h linux.h arm/elf.h arm/linux-gas.h arm/linux-elf.h"
  62         tmake_file="${tmake_file} t-linux arm/t-arm"
  63         case ${target} in
  64 +       arm*b-*)
  65 +               tm_defines="${tm_defines} TARGET_BIG_ENDIAN_DEFAULT=1"
  66 +               ;;
  67 +       esac
  68 +       case ${target} in
  69         arm*-*-linux-*eabi)
  70             tm_file="$tm_file arm/bpabi.h arm/linux-eabi.h"
  71             tmake_file="$tmake_file arm/t-arm-elf arm/t-bpabi arm/t-linux-eabi"