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https://github.com/openwrt/openwrt.git
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120 lines
3.6 KiB
Diff
120 lines
3.6 KiB
Diff
By Lennert Buytenhek <buytenh@wantstofly.org>
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Adds support for arm*b-linux* big-endian ARM targets
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See http://gcc.gnu.org/PR16350
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--- a/gcc/config/arm/linux-elf.h
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+++ b/gcc/config/arm/linux-elf.h
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@@ -28,19 +28,33 @@
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#undef TARGET_VERSION
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#define TARGET_VERSION fputs (" (ARM GNU/Linux with ELF)", stderr);
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+/*
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+ * 'config.gcc' defines TARGET_BIG_ENDIAN_DEFAULT as 1 for arm*b-*
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+ * (big endian) configurations.
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+ */
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+#if TARGET_BIG_ENDIAN_DEFAULT
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+#define TARGET_ENDIAN_DEFAULT MASK_BIG_END
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+#define TARGET_ENDIAN_OPTION "mbig-endian"
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+#define TARGET_LINKER_EMULATION "armelfb_linux"
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+#else
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+#define TARGET_ENDIAN_DEFAULT 0
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+#define TARGET_ENDIAN_OPTION "mlittle-endian"
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+#define TARGET_LINKER_EMULATION "armelf_linux"
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+#endif
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+
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#undef TARGET_DEFAULT_FLOAT_ABI
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#define TARGET_DEFAULT_FLOAT_ABI ARM_FLOAT_ABI_HARD
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#undef TARGET_DEFAULT
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-#define TARGET_DEFAULT (0)
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+#define TARGET_DEFAULT (TARGET_ENDIAN_DEFAULT)
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#define SUBTARGET_CPU_DEFAULT TARGET_CPU_arm6
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-#define SUBTARGET_EXTRA_LINK_SPEC " -m armelf_linux -p"
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+#define SUBTARGET_EXTRA_LINK_SPEC " -m " TARGET_LINKER_EMULATION " -p"
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#undef MULTILIB_DEFAULTS
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#define MULTILIB_DEFAULTS \
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- { "marm", "mlittle-endian", "mhard-float", "mno-thumb-interwork" }
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+ { "marm", TARGET_ENDIAN_OPTION, "mhard-float", "mno-thumb-interwork" }
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/* Now we define the strings used to build the spec file. */
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#undef LIB_SPEC
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@@ -65,7 +79,7 @@
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%{rdynamic:-export-dynamic} \
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%{!dynamic-linker:-dynamic-linker " LINUX_TARGET_INTERPRETER "} \
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-X \
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- %{mbig-endian:-EB}" \
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+ %{mbig-endian:-EB} %{mlittle-endian:-EL}" \
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SUBTARGET_EXTRA_LINK_SPEC
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#undef LINK_SPEC
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--- a/gcc/config.gcc
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+++ b/gcc/config.gcc
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@@ -672,6 +672,11 @@ arm*-*-netbsd*)
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;;
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arm*-*-linux*) # ARM GNU/Linux with ELF
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tm_file="dbxelf.h elfos.h linux.h arm/elf.h arm/linux-gas.h arm/linux-elf.h"
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+ case $target in
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+ arm*b-*)
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+ tm_defines="${tm_defines} TARGET_BIG_ENDIAN_DEFAULT=1"
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+ ;;
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+ esac
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tmake_file="${tmake_file} t-linux arm/t-arm"
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case ${target} in
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arm*-*-linux-gnueabi | arm*-*-linux-uclibcgnueabi)
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--- a/gcc/config/arm/linux-eabi.h
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+++ b/gcc/config/arm/linux-eabi.h
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@@ -20,6 +20,17 @@
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the Free Software Foundation, 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA. */
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+/*
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+ * 'config.gcc' defines TARGET_BIG_ENDIAN_DEFAULT as 1 for arm*b-*
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+ * (big endian) configurations.
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+ */
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+#undef TARGET_LINKER_EMULATION
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+#if TARGET_BIG_ENDIAN_DEFAULT
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+#define TARGET_LINKER_EMULATION "armelfb_linux_eabi"
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+#else
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+#define TARGET_LINKER_EMULATION "armelf_linux_eabi"
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+#endif
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+
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/* On EABI GNU/Linux, we want both the BPABI builtins and the
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GNU/Linux builtins. */
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#undef TARGET_OS_CPP_BUILTINS
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@@ -48,7 +59,7 @@
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#define SUBTARGET_CPU_DEFAULT TARGET_CPU_arm10tdmi
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#undef SUBTARGET_EXTRA_LINK_SPEC
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-#define SUBTARGET_EXTRA_LINK_SPEC " -m armelf_linux_eabi"
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+#define SUBTARGET_EXTRA_LINK_SPEC " -m " TARGET_LINKER_EMULATION
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/* Use ld-linux.so.3 so that it will be possible to run "classic"
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GNU/Linux binaries on an EABI system. */
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--- a/gcc/config/arm/bpabi.h
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+++ b/gcc/config/arm/bpabi.h
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@@ -33,9 +33,19 @@
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#undef FPUTYPE_DEFAULT
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#define FPUTYPE_DEFAULT FPUTYPE_VFP
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+/*
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+ * 'config.gcc' defines TARGET_BIG_ENDIAN_DEFAULT as 1 for arm*b-*
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+ * (big endian) configurations.
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+ */
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+#if TARGET_BIG_ENDIAN_DEFAULT
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+#define TARGET_ENDIAN_DEFAULT MASK_BIG_END
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+#else
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+#define TARGET_ENDIAN_DEFAULT 0
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+#endif
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+
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/* EABI targets should enable interworking by default. */
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#undef TARGET_DEFAULT
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-#define TARGET_DEFAULT MASK_INTERWORK
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+#define TARGET_DEFAULT (MASK_INTERWORK | TARGET_ENDIAN_DEFAULT)
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/* The ARM BPABI functions return a boolean; they use no special
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calling convention. */
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