binnam: handle platforms with an _BOOT section leading

We need in some cases to put a bootstrap entry below everything else and not
have code first. In that case binman needs to back from boot not from code.

diff --git a/Kernel/tools/binman.c b/Kernel/tools/binman.c
index 80fda6d..9ea4cb8 100644 (file)
--- a/Kernel/tools/binman.c
+++ b/Kernel/tools/binman.c
@@ -10,7 +10,7 @@ static unsigned int s__CODE, s__CODE2, s__INITIALIZER, s__DATA,
     s__INITIALIZED, s__INITIALIZER, s__COMMONMEM, s__VIDEO, l__INITIALIZED,
     l__GSFINAL, l__GSINIT, l__COMMONMEM, s__FONT, l__FONT, s__DISCARD,
     l__DISCARD, l__CODE, l__CODE2, l__VIDEO, l__DATA, s__CONST, l__CONST,
-    s__HEAP, l__HEAP, s__PAGE0 = 0xFFFF;
+    s__HEAP, l__HEAP, s__BOOT=0xFFFF, l__BOOT, s__PAGE0 = 0xFFFF;
 
 
 static void ProcessMap(FILE * fp)
@@ -73,6 +73,10 @@ static void ProcessMap(FILE * fp)
                        sscanf(p1, "%x", &s__HEAP);
                if (strcmp(p2, "l__HEAP") == 0)
                        sscanf(p1, "%x", &l__HEAP);
+               if (strcmp(p2, "s__BOOT") == 0)
+                       sscanf(p1, "%x", &s__BOOT);
+               if (strcmp(p2, "l__BOOT") == 0)
+                       sscanf(p1, "%x", &l__BOOT);
                if (strcmp(p2, "s__PAGE0") == 0)
                        sscanf(p1, "%x", &s__PAGE0);
        }
@@ -166,6 +170,11 @@ int main(int argc, char *argv[])
                no_pack = 1;
        }
 
+       /* Some kernels need a special boot area and it may be before the
+          CODE block */
+       if (s__BOOT < start)
+               start = s__BOOT;
+
        /* TODO: Support a proper discardable high discard in other mappings */
 
        /* In an environment with a single process mapped we put the discard