toolchain/gcc/patches/4.1.2/800-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 @@ -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.  */