From: Alan Cox <alan@linux.intel.com>
Date: Sun, 28 Jan 2018 15:20:47 +0000 (+0000)
Subject: binman: spot discard/initializer overlap
X-Git-Url: https://git.ndcode.org/public/gitweb.cgi?a=commitdiff_plain;h=d7b7d559e889a8e8ec83602e48885edadfa6f1fe;p=FUZIX.git

binman: spot discard/initializer overlap
---

diff --git a/Kernel/tools/binman.c b/Kernel/tools/binman.c
index 77c1e693..26962d2a 100644
--- a/Kernel/tools/binman.c
+++ b/Kernel/tools/binman.c
@@ -127,6 +127,15 @@ int main(int argc, char *argv[])
 			s__DISCARD + l__DISCARD - s__COMMONMEM);
 		exit(1);
 	}
+	/* If we have a discard area that overlaps the initializer block
+	   then the compiler will have messed it up. Even though we then
+	   copy the initializers into initialized we can only use the space
+	   for bss */
+	if (s__DISCARD && s__DISCARD + l__DISCARD >= s__INITIALIZER &&
+		s__INITIALIZER + l__INITIALIZED >= s__DISCARD) {
+		fprintf(stderr, "Initializer will have overwritten DISCARD\n");
+		exit(1);
+	}
 
         printf("Scanning data from 0x%x to 0x%x\n",
                 s__DATA, s__DATA + l__DATA);