コミット: fdc37389fbf72c218b82b16505a8e9de3815fbc1 - gcc_dc (git)

GCC with patches for Dreamcast

コミットメタ情報

• リビジョン: fdc37389fbf72c218b82b16505a8e9de3815fbc1 (tree)
• 日時: 2021-09-30 14:15:03
• 作者: alaskanemily <emily@alas...>
• コミッター: alaskanemily

ログメッセージ

Add Dreamcast target

変更サマリ

• modified: config.sub
• modified: fixincludes/mkfixinc.sh
• modified: gcc/config.gcc
• add: gcc/config/dc.h
• modified: gcc/tsystem.h
• modified: libgcc/config.host

差分

--- a/config.sub
+++ b/config.sub
@@ -1415,7 +1415,7 @@ case $os in
 	      | -os2* | -vos* | -palmos* | -uclinux* | -nucleus* \
 	      | -morphos* | -superux* | -rtmk* | -rtmk-nova* | -windiss* \
 	      | -powermax* | -dnix* | -nx6 | -nx7 | -sei* | -dragonfly* \
-	      | -skyos* | -haiku* | -rdos* | -toppers* | -drops* | -es* \
+	      | -skyos* | -haiku* | -rdos* | -toppers* | -drops* | -es* | -dc* \
 	      | -onefs* | -tirtos* | -phoenix* | -fuchsia* | -redox* | -bme*)
 	# Remember, each alternative MUST END IN *, to match a version number.
 		;;

--- a/fixincludes/mkfixinc.sh
+++ b/fixincludes/mkfixinc.sh
@@ -19,7 +19,8 @@ case $machine in
     powerpc-*-rtems*   | \
     powerpcle-*-eabisim* | \
     powerpcle-*-eabi* | \
-    *-musl* )
+    *-musl* |
+    *-dc)
 	#  IF there is no include fixing,
 	#  THEN create a no-op fixer and exit
 	(echo "#! /bin/sh" ; echo "exit 0" ) > ${target}

--- a/gcc/config.gcc
+++ b/gcc/config.gcc
@@ -676,6 +676,11 @@ case ${target} in
     "" | yes | posix) thread_file='posix' ;;
   esac
   ;;
+*-*-dc*)
+  gas=yes
+  gnu_ld=yes
+  use_gcc_stdint=provide
+  ;;
 *-*-dragonfly*)
   gas=yes
   gnu_ld=yes
@@ -2744,6 +2749,14 @@ s390x-ibm-tpf*)
 	extra_options="${extra_options} s390/tpf.opt"
 	tmake_file="${tmake_file} s390/t-s390"
 	;;
+sh*-*-dc*)
+    with_endian=little
+	TM_ENDIAN_CONFIG=ml
+    tm_file="sh/little.h dbxelf.h elfos.h sh/elf.h sh/embed-elf.h ${tm_file} dc.h"
+	sh_cpu_default=sh4-single-only
+	sh_cpu_target=sh4-single-only
+    tm_defines="$tm_defines SUPPORT_SH1=1 SUPPORT_SH2E=1 SUPPORT_SH4=1 SUPPORT_SH4_SINGLE=1"
+    ;;
 sh-*-elf* | sh[12346l]*-*-elf* | \
   sh-*-linux* | sh[2346lbe]*-*-linux* | \
   sh-*-netbsdelf* | shl*-*-netbsdelf*)

--- /dev/null
+++ b/gcc/config/dc.h
@@ -0,0 +1,60 @@
+/*
+ * GCC config for Dreamcast.
+ *
+ * This software is provided 'as-is', without any express or implied
+ *  warranty.  In no event will the authors be held liable for any damages
+ *  arising from the use of this software.
+ * 
+ *  Permission is granted to anyone to use this software for any purpose,
+ *  including commercial applications, and to alter it and redistribute it
+ *  freely, subject to the following restrictions:
+ * 
+ *  1. The origin of this software must not be misrepresented; you must not
+ *     claim that you wrote the original software. If you use this software
+ *     in a product, an acknowledgment in the product documentation would be
+ *     appreciated but is not required.
+ *  2. Altered source versions must be plainly marked as such, and must not be
+ *     misrepresented as being the original software.
+ *  3. This notice may not be removed or altered from any source distribution.
+ */
+
+#undef TARGET_DC
+#define TARGET_DC 1
+
+#undef LINK_SPEC
+#define LINK_SPEC "-N -O -EL --relax"
+
+#undef TARGET_OS_CPP_BUILTINS
+#define TARGET_OS_CPP_BUILTINS() { \
+        builtin_define("__dreamcast__"); \
+        builtin_define("__dc__"); \
+        builtin_assert("system=dc"); \
+        \
+    }
+
+/* Default to unsigned chars */
+#undef DEFAULT_SIGNED_CHAR
+#define DEFAULT_SIGNED_CHAR 0
+
+/* Used from ASM */
+#undef TARGET_CXX_CDTOR_RETURN_THIS
+#define TARGET_CXX_CDTOR_RETURN_THIS() true
+
+/* BYOlibm */
+#undef MATH_LIBRARY
+#define MATH_LIBRARY ""
+
+#undef LIBGCC_SPEC
+#define LIBGCC_SPEC "%{!shared: \
+  %{m4-100*:-lic_invalidate_array_4-100} \
+  %{m4-200*:-lic_invalidate_array_4-200} \
+  %{Os: -lgcc-Os-4-200} \
+  -lgcc \
+  %{!Os: -lgcc-Os-4-200}"
+
+#undef CC1_SPEC
+#define CC1_SPEC " -mhitachi "
+
+#undef CC1PLUS_SPEC
+#define CC1PLUS_SPEC " -fno-rtti -fno-exceptions "
+

--- a/gcc/tsystem.h
+++ b/gcc/tsystem.h
@@ -26,6 +26,8 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
 #ifndef GCC_TSYSTEM_H
 #define GCC_TSYSTEM_H
 
+#define inhibit_libc 1
+
 /* System headers (e.g. stdio.h, stdlib.h, unistd.h) sometimes
    indirectly include getopt.h.  Our -I flags will cause gcc's gnu
    getopt.h to be included, not the platform's copy.  In the default

--- a/libgcc/config.host
+++ b/libgcc/config.host
@@ -1182,6 +1182,17 @@ s390x-ibm-tpf*)
 	extra_parts="crtbeginS.o crtendS.o"
 	md_unwind_header=s390/tpf-unwind.h
 	;;
+sh*-*-dc*)
+	tmake_file="$tmake_file sh/t-sh"
+    # TODO: Some of these files are not useful on Dreamcast, but the shouldn't
+    # actually cause any problems.
+    # The Dreamcast also does have an MMU, but it's assumed this will either
+    # not be used at all, or will be entirely managed by the software.
+	extra_parts="$extra_parts crt1.o crti.o crtn.o crtbeginS.o crtendS.o \
+		libic_invalidate_array_4-100.a \
+		libic_invalidate_array_4-200.a \
+		libgcc-Os-4-200.a libgcc-4-300.a"
+	;;
 sh-*-elf* | sh[12346l]*-*-elf*)
 	tmake_file="$tmake_file sh/t-sh t-crtstuff-pic t-fdpbit"
 	extra_parts="$extra_parts crt1.o crti.o crtn.o crtbeginS.o crtendS.o \