toolchain/gcc/patches/3.4.6/800-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 diff -urN gcc-3.4.1-dist/gcc/config/arm/linux-elf.h gcc-3.4.1/gcc/config/arm/linux-elf.h
   7 --- gcc-3.4.1-dist/gcc/config/arm/linux-elf.h   2004-08-16 16:01:50.000000000 -0500
   8 +++ gcc-3.4.1/gcc/config/arm/linux-elf.h        2004-08-16 15:43:40.000000000 -0500
   9 @@ -30,17 +30,34 @@
  10  /* Do not assume anything about header files.  */
  11  #define NO_IMPLICIT_EXTERN_C
  12
  13 +/*
  14 + * 'config.gcc' defines TARGET_BIG_ENDIAN_DEFAULT as 1 for arm*b-*
  15 + * (big endian) configurations.
  16 + */
  17 +#if TARGET_BIG_ENDIAN_DEFAULT
  18 +#define TARGET_ENDIAN_DEFAULT ARM_FLAG_BIG_END
  19 +#define TARGET_ENDIAN_OPTION "mbig-endian"
  20 +#define TARGET_LINKER_EMULATION "armelfb_linux"
  21 +#else
  22 +#define TARGET_ENDIAN_DEFAULT 0
  23 +#define TARGET_ENDIAN_OPTION "mlittle-endian"
  24 +#define TARGET_LINKER_EMULATION "armelf_linux"
  25 +#endif
  26 +
  27  /* Default is to use APCS-32 mode.  */
  28  #undef  TARGET_DEFAULT
  29 -#define TARGET_DEFAULT (ARM_FLAG_APCS_32 | ARM_FLAG_MMU_TRAPS)
  30 +#define TARGET_DEFAULT \
  31 +               ( ARM_FLAG_APCS_32 | \
  32 +                 ARM_FLAG_MMU_TRAPS | \
  33 +                 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", "mapcs-32", "mno-thumb-interwork" }
  43 +       { "marm", TARGET_ENDIAN_OPTION, "mhard-float", "mapcs-32", "mno-thumb-interwork" }
  44
  45  #define CPP_APCS_PC_DEFAULT_SPEC "-D__APCS_32__"
  46
  47 @@ -101,7 +118,7 @@
  48     %{rdynamic:-export-dynamic} \
  49     %{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.2} \
  50     -X \
  51 -   %{mbig-endian:-EB}" \
  52 +   %{mbig-endian:-EB} %{mlittle-endian:-EL}" \
  53     SUBTARGET_EXTRA_LINK_SPEC
  54  #endif
  55
  56 diff -urN gcc-3.4.1-dist/gcc/config.gcc gcc-3.4.1/gcc/config.gcc
  57 --- gcc-3.4.1-dist/gcc/config.gcc       2004-08-16 16:01:50.000000000 -0500
  58 +++ gcc-3.4.1/gcc/config.gcc    2004-08-16 16:01:25.000000000 -0500
  59 @@ -672,6 +672,11 @@
  60         ;;
  61  arm*-*-linux*)                 # ARM GNU/Linux with ELF
  62         tm_file="dbxelf.h elfos.h linux.h arm/elf.h  arm/linux-gas.h arm/linux-elf.h arm/aout.h arm/arm.h"
  63 +       case $target in
  64 +       arm*b-*)
  65 +               tm_defines="TARGET_BIG_ENDIAN_DEFAULT=1 $tm_defines"
  66 +               ;;
  67 +       esac
  68         tmake_file="t-slibgcc-elf-ver t-linux arm/t-linux"
  69         extra_parts="crtbegin.o crtbeginS.o crtend.o crtendS.o"
  70         gnu_ld=yes