Generate the final link linker scripts.

SConstruct

@@ -261,7 +261,7 @@ else :
     loaderEnvironment = baseEnvironment.Clone(
         CC = 'arm-none-linux-gnueabi-gcc',
         CCFLAGS = ['-g', '-nostdlib', '-ffreestanding', '-std=gnu99', '-Wall', '-Werror'],
-        LINKFLAGS = ['-nostdlib', '-Tloader/mylink.lds'],
+        LINKFLAGS = ['-nostdlib', '-T' + buildDirectory + '/loader/linker.lds'],
         PROGSUFFIX = '.axf',
         LIBS = [libelf, libs['baremetal'], 'gcc', libs['baremetal']],
         CPPPATH = ['#libs/elf/include', '#' + buildDirectory + '/loader'])

loader/SConscript

@@ -74,22 +74,44 @@ def createMainC(target, source, env):
             for item in source[1:]:
                 name = os.path.splitext(item.name)[0]
                 if name == 'start' : name = 'kernel'
-                externs += 'extern char _start_%s[];\nextern char _end_%s[];\n' % (name, name)
+                externs += '''
-                declarations += 'void *%s_entry = NULL;\n' % (name,)
+extern char _start_%s[];
-                loads += 'printf("Loading the %s...\\n");\nload_image(&%s_entry, _start_%s, _end_%s);\n' %(name, name, name, name)
+extern char _end_%s[];
+''' % (name, name)
+                declarations += '        void *%s_entry = NULL;\n' % (name,)
+                loads += '''
+        printf("Loading the %s...\\n");
+        load_image(&%s_entry, _start_%s, _end_%s);
+''' %(name, name, name, name)
             text = inFile.read()
             text = text.replace('__EXTERNAL_SYMBOLS_EDIT_MARKER__', externs)
             text = text.replace('__DECLARATIONS_EDIT_MARKER__', declarations)
             text = text.replace('__LOAD_STATEMENTS_EDIT_MARKER__', loads)
             outFile.write(text)
 
+def createLinkerScript(target, source, env):
+    with open(source[0].path) as inFile:
+        with open(target[0].path, 'w') as outFile:
+            linkerItems = ''
+            for item in source[1:]:
+                name = os.path.splitext(item.name)[0]
+                if name == 'start' : name = 'kernel'
+                linkerItems += '''
+		_start_%s = .;
+		*(.%s)
+		_end_%s = .;
+''' % (name, name, name)
+            outFile.write(inFile.read().replace('__LINKER_ITEMS_EDIT_MARKER__', linkerItems))
+
 startAxfS = Command('start.axf.S', images[0], ksymToLds)
 kernelS = Command('kernel.S', images + [startAxfS], createKernelSFile)
 mainC = Command('main.c', ['main.c.in'] + images, createMainC)
+linkerScript = Command('linker.lds', ['linker.lds.in'] + images, createLinkerScript)
 
 objects = environment.Object(['arch.c' , kernelS, startAxfS, mainC])
 Depends(objects, environment['configFiles'])
 Depends(objects, images)
 program = environment.Program('final', objects + [environment['baremetal_crt0']])
+Depends(program, linkerScript)
 
 Return('program')

loader/linker.lds.in

@@ -1,3 +1,11 @@
+/****
+ ****  Template for generating a linker.lds.  Edit markers have replaced some items in the original file
+ ****
+ ****  Copyright © 2009  B Labs Ltd
+ ****
+ ****  Author: Russel Winder.
+ ****/
+
 /*
  * Simple linker script for userspace or svc tasks.
  *
@@ -13,21 +21,7 @@ SECTIONS
 	.rodata1 : { *(.rodata1) }
 	.data :
 	{
-		_start_kernel = .;
+__LINKER_ITEMS_EDIT_MARKER__
-		*(.kernel)
-		_end_kernel = .;
-		_start_bootdesc = .;
-		*(.bootdesc)
-		_end_bootdesc = .;
-		_start_mm0 = .;
-		*(.mm0)
-		_end_mm0 = .;
-		_start_fs0 = .;
-		*(.fs0)
-		_end_fs0 = .;
-		_start_test0 = .;
-		*(.test0)
-		_end_test0 = .;
 		*(.data)
 	}
 	.got : { *(.got) *(.got.plt) }

loader/main.c.in

@@ -1,3 +1,11 @@
+/****
+ ****  Template for generating a main.c.  Edit markers have replaced some items in the original file
+ ****
+ ****  Copyright © 2009  B Labs Ltd
+ ****
+ ****  Author: Russel Winder.
+ ****/
+
 /*******************************************************************************
 * Filename:    src/main.c                                                      *
 * Description: Elf-loader - ELF file kernel/application bootstraper, main      *
@@ -113,7 +121,7 @@ main(void)
 {
   /* Declarations added here.*/
 
-  __DECLARATIONS_EDIT_MARKER__
+__DECLARATIONS_EDIT_MARKER__
 
 	arch_init();
 
@@ -121,7 +129,7 @@ main(void)
 
   /*  Loader statements added here. */
 
-  __LOAD_STATEMENTS_EDIT_MARKER__
+__LOAD_STATEMENTS_EDIT_MARKER__
 
 	printf("elf-loader:\tkernel entry point is %p\n", kernel_entry);
 	arch_start_kernel(kernel_entry);