From: Will Sowerbutts <will@sowerbutts.com>
Date: Mon, 5 Jan 2015 00:49:44 +0000 (+0000)
Subject: binman: Fail when _DISCARD grows to overlap _COMMONMEM
X-Git-Url: https://git.ndcode.org/public/gitweb.cgi?a=commitdiff_plain;h=45690f3a3a0892c0c733204d0f00b6151ba67cc1;p=FUZIX.git

binman: Fail when _DISCARD grows to overlap _COMMONMEM
---

diff --git a/Kernel/tools/binman.c b/Kernel/tools/binman.c
index 8aeff896..224ce1f6 100644
--- a/Kernel/tools/binman.c
+++ b/Kernel/tools/binman.c
@@ -115,6 +115,14 @@ int main(int argc, char *argv[])
 		exit(1);
 	}
 
+	/* linker will allow us to overlap _DISCARD (which may grow)
+	   with with _COMMONMEM. */
+	if(s__DISCARD && s__DISCARD+l__DISCARD > s__COMMONMEM){
+		fprintf(stderr, "Move _DISCARD down by at least %d bytes\n",
+			s__DISCARD + l__DISCARD - s__COMMONMEM);
+		exit(1);
+	}
+
         printf("Scanning data from 0x%x to 0x%x\n",
                 s__DATA, s__DATA + l__DATA);
 	base = s__DATA;