1 files changed, 170 insertions, 0 deletions
diff --git a/util/mkelfImage/kunzip_src/lib/kunzip.c b/util/mkelfImage/kunzip_src/lib/kunzip.c
new file mode 100644
index 0000000000..4bfe504f70
--- /dev/null
+++ b/util/mkelfImage/kunzip_src/lib/kunzip.c
@@ -0,0 +1,170 @@
+#include <string.h>
+#include <stdlib.h>
+
+/*
+ * gzip support routine declartions..
+ * =========================================================
+ */
+
+#ifdef DEBUG
+#  define Trace(x) 
+#  define Tracev(x)
+#  define Tracevv(x)
+#  define Tracec(c,x)
+#  define Tracecv(c,x)
+#  define DBG(x) printf x
+#else
+#  define Trace(x)
+#  define Tracev(x)
+#  define Tracevv(x)
+#  define Tracec(c,x)
+#  define Tracecv(c,x)
+#  define DBG(x)
+#endif
+
+void error(char *str)
+{
+	DBG(("%s\n", str));
+}
+
+static unsigned char *inbuf;	/* input buffer */
+static unsigned int insize;	/* valid bytes in inbuf */
+static unsigned int inptr;	/* index of next byte to be processed in inbuf */
+
+#if !defined(DEBUG)
+#define get_byte()  (inptr < insize ? inbuf[inptr++] : 0)
+#else
+static unsigned char get_byte(void)
+{
+	static int count;
+	unsigned char byte = (inptr < insize ? inbuf[inptr++] : 0);
+#if 0
+	printf("%02x ", byte);
+	if ((++count & 0x0f) == 0) {
+		printf("\n");
+	}
+#endif
+	return byte;
+}
+
+#endif
+
+static void flush_window(void);
+
+static long bytes_out;		/* total bytes compressed */
+static unsigned outcnt;		/* bytes in output buffer */
+
+#define WSIZE 0x8000		/* Window size must be at least 32k, and a power of two */
+static unsigned char window[WSIZE];	/* Sliding window buffer */
+
+/*
+ * gzip declarations
+ */
+
+#define OF(args)  args
+#define STATIC static
+
+
+#define memzero(s, n)     memset ((s), 0, (n))
+
+typedef unsigned char uch;
+typedef unsigned short ush;
+typedef unsigned long ulg;
+
+
+
+#include "inflate.c"
+
+
+/* Variables that gunzip doesn't need to see... */
+static unsigned char *output_ptr;
+static unsigned long end_offset;
+static struct unzip_region {
+	unsigned long start;
+	unsigned long end_offset;
+} unzip_region;
+
+/* Data provided by the header */
+extern unsigned char zipped_data[];
+extern unsigned char zipped_data_end[];
+extern unsigned char entry;
+/* Assembly language routines */
+extern void jmp_to_program_entry(void *);
+
+/* ===========================================================================
+ * Write the output window window[0..outcnt-1] and update crc and bytes_out.
+ * (Used for the decompressed data only.)
+ */
+static void flush_window(void)
+{
+	ulg c = crc;		/* temporary variable */
+	unsigned n;
+	unsigned long limit;
+	uch *in, *out, ch;
+
+	limit = outcnt;
+
+
+	n = 0;
+	in = window;
+	while (n < outcnt) {
+		limit = end_offset - bytes_out +n;
+		if (limit > outcnt) {
+			limit = outcnt;
+		}
+		out = output_ptr;
+		DBG(("flush 0x%08lx start 0x%08lx limit 0x%08lx\n", 
+			(unsigned long) out, (unsigned long)n, limit));
+		for (; n < limit; n++) {
+			ch = *out++ = *in++;
+			c = crc_32_tab[((int) c ^ ch) & 0xff] ^ (c >> 8);
+		}
+		crc = c;
+		bytes_out += (out - output_ptr);
+		output_ptr = out;
+		if (bytes_out == end_offset) {
+			if (output_ptr == (unsigned char *)(&unzip_region+1)) {
+				output_ptr = (unsigned char *)(unzip_region.start);
+				end_offset = unzip_region.end_offset;
+			} else {
+				output_ptr = (unsigned char *)&unzip_region;
+				end_offset += sizeof(unzip_region);
+			}
+		}
+	}
+	outcnt = 0;
+}
+
+
+void gunzip_setup(void)
+{
+	DBG(("gunzip_setup\n"));
+	outcnt = 0;
+	bytes_out = 0;
+
+	end_offset = sizeof(unzip_region);
+	output_ptr = (unsigned char *)&unzip_region;
+
+	inbuf = &zipped_data[0];
+	insize = zipped_data_end - zipped_data;
+	inptr = 0;
+
+	makecrc();
+	DBG(("gunzip_setup_done\n"));
+}
+
+
+int kunzip(int argc, char **argv)
+{
+	DBG(("kunzip\n"));
+	gunzip_setup();
+	DBG(("pre_gunzip\n"));
+	if (gunzip() != 0) {
+		error("gunzip failed");
+		while(1) {}
+		return -1;
+	}
+	DBG(("pre_jmp_to_program_entry: %p\n", &entry ));
+	jmp_to_program_entry(&entry);
+	return 0;
+}