build vram crt0

dkarm-eabi/crtls/Makefile

@@ -3,3 +3,8 @@ include $(DEVKITARM)/base_rules
 all:
 	$(CC)  -x assembler-with-cpp -marm -c $(CRT)_crt0.s -o$(CRT)_crt0.o
 	$(CC)  -x assembler-with-cpp -mthumb -c $(CRT)_crt0.s -o thumb/$(CRT)_crt0.o
+
+ds_arm7_vram_crt0:
+	$(CC)  -x assembler-with-cpp -marm -c -DVRAM ds_arm7_crt0.s -ods_arm7_vram_crt0.o
+	$(CC)  -x assembler-with-cpp -mthumb -c -DVRAM ds_arm7_crt0.s -othumb/ds_arm7_vram_crt0.o
+

dkarm-eabi/crtls/ds_arm7_crt0.s

@@ -23,6 +23,7 @@ _start:
 	msr	cpsr, r0
 	ldr	sp, =__sp_usr		@ Set user stack
 
+#ifndef VRAM
 	adr	r1, __sync_start	@ Perform ARM7<->ARM9 sync code
 	ldr	r2, =__arm7_start__
 	mov	r3, #(__sync_end-__sync_start)
@@ -30,7 +31,9 @@ _start:
 	bl	CopyMem
 	mov	r3, r8
 	bl	_blx_r3_stub
-
+#else
+	bl	__sync_start
+#endif
 @---------------------------------------------------------------------------------
 @ Copy initialized data (data section) from LMA to VMA (EWRAM to IWRAM)
 @---------------------------------------------------------------------------------
@@ -46,6 +49,7 @@ _start:
 	sub	r1, r1, r0
 	bl	ClearMem
 
+#ifndef VRAM
 	cmp	r10, #1
 	bne	NotTWL
 	ldr	r1, =__dsimode		@ set DSi mode flag
@@ -60,6 +64,7 @@ _start:
 	ldr	r1, =__twl_bss_end__
 	sub	r1, r1, r0
 	bl	ClearMem
+#endif
 
 NotTWL:
 	ldr	r3, =__libc_init_array	@ global constructors

dkarm-eabi/crtls/ds_arm7_vram.specs

@@ -4,5 +4,5 @@
 %(old_link) -T ds_arm7_vram.ld%s
 
 *startfile:
-ds_arm7_crt0%O%s crti%O%s crtbegin%O%s
+ds_arm7_vram_crt0%O%s crti%O%s crtbegin%O%s
 

dkarm-eabi/scripts/build-crtls.sh

@@ -21,6 +21,7 @@ $MAKE CRT=gp32_gpsdk
 $MAKE CRT=ds_arm7
 $MAKE CRT=ds_arm9
 $MAKE CRT=ds_cart
+$MAKE ds_arm7_vram_crt0
 $target-gcc -march=armv6k -mfloat-abi=hard -c 3dsx_crt0.s -o armv6k/fpu/3dsx_crt0.o
 
 cd $BUILDDIR/libgba-$LIBGBA_VER