Imported pristine psxsdk-20190410 from official repo

1 files changed, 50 insertions, 0 deletions

diff --git a/libpsx/src/setup.c b/libpsx/src/setup.c
new file mode 100644
index 0000000..d77f062
--- /dev/null
+++ b/libpsx/src/setup.c
@@ -0,0 +1,50 @@
+#include <psx.h>
+#include <stdio.h>
+#include "memory.h"
+
+extern int __bss_start[];
+extern int __bss_end[];
+
+extern void *__ctor_list;
+extern void *__ctor_end;
+
+
+// Function to call static constructors (for C++, etc.)
+static void call_ctors(void)
+{
+	dprintf("Calling static constructors...\n");
+
+	void **p = &__ctor_end - 1;
+	
+	for(--p; *p != NULL && (int)*p != -1 && p > &__ctor_list; p--)
+	{
+		dprintf("Constructor address = %x\n", (unsigned int)*p);
+		(*(void (**)())p)();
+	}
+	
+	dprintf("Finished calling static constructors\n");
+}
+
+void psxsdk_setup()
+{
+	unsigned int x;
+
+	printf("Initializing PSXSDK... \n");
+
+	dprintf("Clearing BSS space...\n");
+	
+// Clear BSS space	
+	for(x = (unsigned int)__bss_start; x < (unsigned int)__bss_end; x++)
+		*((unsigned char*)x) = 0;
+
+	dprintf("BSS space cleared.\n");
+	
+// Setup memory allocation functions
+	malloc_setup();
+	
+	dprintf("Finished setting up memory allocation functions.\n");
+
+// Call static constructors
+	call_ctors();
+
+}