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 Index: gcc-4.1.1/gcc/config/arm/linux-elf.h
   7 ===================================================================
   8 --- gcc-4.1.1.orig/gcc/config/arm/linux-elf.h
   9 +++ gcc-4.1.1/gcc/config/arm/linux-elf.h
  10 @@ -28,19 +28,33 @@
  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 @@ -61,7 +75,7 @@
  48     %{rdynamic:-export-dynamic} \
  49     %{!dynamic-linker:-dynamic-linker " LINUX_TARGET_INTERPRETER "} \
  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-4.1.1/gcc/config.gcc
  57 ===================================================================
  58 --- gcc-4.1.1.orig/gcc/config.gcc
  59 +++ gcc-4.1.1/gcc/config.gcc
  60 @@ -672,6 +672,11 @@ arm*-*-netbsd*)
  61         ;;
  62  arm*-*-linux*)                 # ARM GNU/Linux with ELF
  63         tm_file="dbxelf.h elfos.h linux.h arm/elf.h arm/linux-gas.h arm/linux-elf.h"
  64 +       case $target in
  65 +       arm*b-*)
  66 +               tm_defines="${tm_defines} TARGET_BIG_ENDIAN_DEFAULT=1"
  67 +               ;;
  68 +       esac
  69         tmake_file="${tmake_file} t-linux arm/t-arm"
  70         case ${target} in
  71         arm*-*-linux-gnueabi)
  72 Index: gcc-4.1.1/gcc/config/arm/linux-eabi.h
  73 ===================================================================
  74 --- gcc-4.1.1.orig/gcc/config/arm/linux-eabi.h
  75 +++ gcc-4.1.1/gcc/config/arm/linux-eabi.h
  76 @@ -20,6 +20,17 @@
  77     the Free Software Foundation, 51 Franklin Street, Fifth Floor,
  78     Boston, MA 02110-1301, USA.  */
  79
  80 +/*
  81 + * 'config.gcc' defines TARGET_BIG_ENDIAN_DEFAULT as 1 for arm*b-*
  82 + * (big endian) configurations.
  83 + */
  84 +#undef TARGET_LINKER_EMULATION
  85 +#if TARGET_BIG_ENDIAN_DEFAULT
  86 +#define TARGET_LINKER_EMULATION "armelfb_linux_eabi"
  87 +#else
  88 +#define TARGET_LINKER_EMULATION "armelf_linux_eabi"
  89 +#endif
  90 +
  91  /* On EABI GNU/Linux, we want both the BPABI builtins and the
  92     GNU/Linux builtins.  */
  93  #undef TARGET_OS_CPP_BUILTINS
  94 @@ -48,7 +59,7 @@
  95  #define SUBTARGET_CPU_DEFAULT TARGET_CPU_arm10tdmi
  96
  97  #undef SUBTARGET_EXTRA_LINK_SPEC
  98 -#define SUBTARGET_EXTRA_LINK_SPEC " -m armelf_linux_eabi"
  99 +#define SUBTARGET_EXTRA_LINK_SPEC " -m " TARGET_LINKER_EMULATION
 100
 101  /* Use ld-linux.so.3 so that it will be possible to run "classic"
 102     GNU/Linux binaries on an EABI system.  */
 103 Index: gcc-4.1.1/gcc/config/arm/bpabi.h
 104 ===================================================================
 105 --- gcc-4.1.1.orig/gcc/config/arm/bpabi.h
 106 +++ gcc-4.1.1/gcc/config/arm/bpabi.h
 107 @@ -33,9 +33,19 @@
 108  #undef FPUTYPE_DEFAULT
 109  #define FPUTYPE_DEFAULT FPUTYPE_VFP
 110
 111 +/*
 112 + * 'config.gcc' defines TARGET_BIG_ENDIAN_DEFAULT as 1 for arm*b-*
 113 + * (big endian) configurations.
 114 + */
 115 +#if TARGET_BIG_ENDIAN_DEFAULT
 116 +#define TARGET_ENDIAN_DEFAULT MASK_BIG_END
 117 +#else
 118 +#define TARGET_ENDIAN_DEFAULT 0
 119 +#endif
 120 +
 121  /* EABI targets should enable interworking by default.  */
 122  #undef TARGET_DEFAULT
 123 -#define TARGET_DEFAULT MASK_INTERWORK
 124 +#define TARGET_DEFAULT (MASK_INTERWORK | TARGET_ENDIAN_DEFAULT)
 125
 126  /* The ARM BPABI functions return a boolean; they use no special
 127     calling convention.  */