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diff lwlink/script.c @ 315:fcd103148aa6

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Add ability to load sections downward instead of upward Add "section ... high ..." statement to link scripts to allow a section to be placed based on its end address instead of its start address. All sections listed after such a statement are treated as growing downward until the next section statement specifying a load address.
author William Astle <lost@l-w.ca>
date Wed, 27 Nov 2013 16:01:26 -0700
parents 86eb8814a05c
children 55c1f9a321e9
line wrap: on
line diff
--- a/lwlink/script.c	Tue Nov 12 21:03:48 2013 -0700
+++ b/lwlink/script.c	Wed Nov 27 16:01:26 2013 -0700
@@ -380,6 +380,7 @@
 		}
 		else if (!strcmp(line, "section"))
 		{
+			int growsdown = 0;
 			// section
 			// parse out the section name and flags
 			for (ptr2 = ptr; *ptr2 && !isspace(*ptr2); ptr2++)
@@ -404,12 +405,24 @@
 						ptr2++;
 					
 				}
+				else if (!strncmp(ptr2, "high", 4))
+				{
+					ptr2 += 4;
+					while (*ptr2 && isspace(*ptr2))
+						ptr2++;
+					growsdown = 1;
+				}
 				else
 				{
 					fprintf(stderr, "%s: bad script\n", scriptfile);
 					exit(1);
 				}
 			}
+			else
+			{
+				if (linkscript.nlines > 0)
+					growsdown = linkscript.lines[linkscript.nlines - 1].growsdown;
+			}
 			
 			// now ptr2 points to the load address if there is one
 			// or NUL if not
@@ -417,6 +430,7 @@
 
 			linkscript.lines[linkscript.nlines].noflags = 0;
 			linkscript.lines[linkscript.nlines].yesflags = 0;
+			linkscript.lines[linkscript.nlines].growsdown = growsdown;
 			if (*ptr2)
 				linkscript.lines[linkscript.nlines].loadat = strtol(ptr2, NULL, 16);
 			else