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