kexec-tools: bump version from v2.0.4 to v2.0.9.

- kexec-tools is now distributed with tarballs of .tar.gz and .tar.xz
   format; .tar.bz2 are not provided anymore.
 - Add CONFIG_KEXEC_LZMA for selecting lzma support.

Patches are updated along to:

 - Remove the now unnecessary patch 0004-mips_regdefs.patch.
 - Drop 100-reduce_size.patch because the size reduction is marginal.
 - Allow zlib and lzma support coexist together.  This patch has been
   merged into upstream project.
 - Fix kexec-tools' configure.ac.
 - Fix a few compilation warnings.

Size comparison of stripped binaries of kexec malta target with both
zlib and lzma support enabled.

 - Before: 41447
 - After:  42583

Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>

SVN-Revision: 44437

1 files changed, 171 insertions, 0 deletions

diff --git a/package/boot/kexec-tools/patches/0001-Fix-zlib-lzma-decompression.patch b/package/boot/kexec-tools/patches/0001-Fix-zlib-lzma-decompression.patch
new file mode 100644
index 0000000..06c11ec
--- /dev/null
+++ b/package/boot/kexec-tools/patches/0001-Fix-zlib-lzma-decompression.patch
@@ -0,0 +1,171 @@
+From d606837b56d46eb7f815b5d85f07fcc3f1555d00 Mon Sep 17 00:00:00 2001
+From: Yousong Zhou <yszhou4tech@gmail.com>
+Date: Sun, 1 Feb 2015 00:10:07 +0800
+Subject: [PATCH 1/5] Fix zlib/lzma decompression.
+
+Let {zlib,lzma}_decompress_file() return NULL if anything wrong happened
+to allow the other method to have a chance to run.
+
+Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>
+Signed-off-by: Simon Horman <horms@verge.net.au>
+---
+ kexec/lzma.c |   33 ++++++++++++++++++++++-----------
+ kexec/zlib.c |   57 +++++++++++++++++++++++++++++++++++----------------------
+ 2 files changed, 57 insertions(+), 33 deletions(-)
+
+diff --git a/kexec/lzma.c b/kexec/lzma.c
+index 939aeb3..5bfccb7 100644
+--- a/kexec/lzma.c
++++ b/kexec/lzma.c
+@@ -162,13 +162,16 @@ char *lzma_decompress_file(const char *filename, off_t *r_size)
+ 	off_t size, allocated;
+ 	ssize_t result;
+ 
+-	if (!filename) {
+-		*r_size = 0;
+-		return 0;
+-	}
++	dbgprintf("Try LZMA decompression.\n");
++
++	*r_size = 0;
++	if (!filename)
++		return NULL;
++
+ 	fp = lzopen(filename, "rb");
+ 	if (fp == 0) {
+-		die("Cannot open `%s'\n", filename);
++		dbgprintf("Cannot open `%s'\n", filename);
++		return NULL;
+ 	}
+ 	size = 0;
+ 	allocated = 65536;
+@@ -183,17 +186,25 @@ char *lzma_decompress_file(const char *filename, off_t *r_size)
+ 			if ((errno == EINTR) || (errno == EAGAIN))
+ 				continue;
+ 
+-			die ("read on %s of %ld bytes failed\n",
+-				filename, (allocated - size) + 0UL);
++			dbgprintf("%s: read on %s of %ld bytes failed\n",
++				__func__, filename, (allocated - size) + 0UL);
++			break;
+ 		}
+ 		size += result;
+-	} while(result > 0);
+-	result = lzclose(fp);
+-	if (result != LZMA_OK) {
+-		die ("Close of %s failed\n", filename);
++	} while (result > 0);
++
++	if (lzclose(fp) != LZMA_OK) {
++		dbgprintf("%s: Close of %s failed\n", __func__, filename);
++		goto fail;
+ 	}
++	if (result < 0)
++		goto fail;
++
+ 	*r_size =  size;
+ 	return buf;
++fail:
++	free(buf);
++	return NULL;
+ }
+ #else
+ char *lzma_decompress_file(const char *UNUSED(filename), off_t *UNUSED(r_size))
+diff --git a/kexec/zlib.c b/kexec/zlib.c
+index d44df12..7170ac3 100644
+--- a/kexec/zlib.c
++++ b/kexec/zlib.c
+@@ -15,29 +15,39 @@
+ #include <ctype.h>
+ #include <zlib.h>
+ 
++static void _gzerror(gzFile fp, int *errnum, const char **errmsg)
++{
++	*errmsg = gzerror(fp, errnum);
++	if (*errnum == Z_ERRNO) {
++		*errmsg = strerror(*errnum);
++	}
++}
++
+ char *zlib_decompress_file(const char *filename, off_t *r_size)
+ {
+ 	gzFile fp;
+ 	int errnum;
+ 	const char *msg;
+ 	char *buf;
+-	off_t size, allocated;
++	off_t size = 0, allocated;
+ 	ssize_t result;
+ 
++	dbgprintf("Try gzip decompression.\n");
++
++	*r_size = 0;
+ 	if (!filename) {
+-		*r_size = 0;
+-		return 0;
++		return NULL;
+ 	}
+ 	fp = gzopen(filename, "rb");
+ 	if (fp == 0) {
+-		msg = gzerror(fp, &errnum);
+-		if (errnum == Z_ERRNO) {
+-			msg = strerror(errno);
+-		}
+-		fprintf(stderr, "Cannot open `%s': %s\n", filename, msg);
++		_gzerror(fp, &errnum, &msg);
++		dbgprintf("Cannot open `%s': %s\n", filename, msg);
++		return NULL;
++	}
++	if (gzdirect(fp)) {
++		/* It's not in gzip format */
+ 		return NULL;
+ 	}
+-	size = 0;
+ 	allocated = 65536;
+ 	buf = xmalloc(allocated);
+ 	do {
+@@ -49,25 +59,28 @@ char *zlib_decompress_file(const char *filename, off_t *r_size)
+ 		if (result < 0) {
+ 			if ((errno == EINTR) || (errno == EAGAIN))
+ 				continue;
+-
+-			msg = gzerror(fp, &errnum);
+-			if (errnum == Z_ERRNO) {
+-				msg = strerror(errno);
+-			}
+-			die ("read on %s of %ld bytes failed: %s\n",
+-				filename, (allocated - size) + 0UL, msg);
++			_gzerror(fp, &errnum, &msg);
++			dbgprintf("Read on %s of %ld bytes failed: %s\n",
++					filename, (allocated - size) + 0UL, msg);
++			size = 0;
++			goto fail;
+ 		}
+ 		size += result;
+ 	} while(result > 0);
++
++fail:
+ 	result = gzclose(fp);
+ 	if (result != Z_OK) {
+-		msg = gzerror(fp, &errnum);
+-		if (errnum == Z_ERRNO) {
+-			msg = strerror(errno);
+-		}
+-		die ("Close of %s failed: %s\n", filename, msg);
++		_gzerror(fp, &errnum, &msg);
++		dbgprintf(" Close of %s failed: %s\n", filename, msg);
++	}
++
++	if (size > 0) {
++		*r_size = size;
++	} else {
++		free(buf);
++		buf = NULL;
+ 	}
+-	*r_size =  size;
+ 	return buf;
+ }
+ #else
+-- 
+1.7.10.4
+