From 21532b9e5bd597631cfe38d9eb34df069938065b Mon Sep 17 00:00:00 2001
From: "Tautschnig, Michael" <tautschn@amazon.co.uk>
Date: Mon, 4 Jul 2016 13:55:04 +0000
Subject: scripts: Fix size mismatch of kexec_purgatory_size

bin2c is used to create a valid C file out of a binary file where two
symbols will be globally defined: <name> and <name>_size. <name> is
passed as the first parameter of the host binary.

Building using goto-cc reported that the purgatory binary code (the only
current user of this utility) declares kexec_purgatory_size as 'size_t'
where bin2c generate <name>_size to be 'int' so in a 64-bit host where
sizeof(size_t) > sizeof(int) this type mismatch will always yield the
wrong value for big-endian architectures while for little-endian it will
be wrong if the object laid in memory directly after
kexec_purgatory_size contains non-zero value at the time of reading.

This commit changes <name>_size to be size_t instead.

Note:

Another way to fix the problem is to change the type of
kexec_purgatory_size to be 'int' as there's this check in code:
(kexec_purgatory_size <= 0)

Signed-off-by: Michael Tautschnig <tautschn@amazon.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
Signed-off-by: Michal Marek <mmarek@suse.com>

diff --git a/scripts/basic/bin2c.c b/scripts/basic/bin2c.c
index af187e6..c3d7eef 100644
--- a/scripts/basic/bin2c.c
+++ b/scripts/basic/bin2c.c
@@ -29,7 +29,8 @@ int main(int argc, char *argv[])
 	} while (ch != EOF);
 
 	if (argc > 1)
-		printf("\t;\n\nconst int %s_size = %d;\n", argv[1], total);
+		printf("\t;\n\n#include <linux/types.h>\n\nconst size_t %s_size = %d;\n",
+		       argv[1], total);
 
 	return 0;
 }
-- 
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