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Construct main.c from a template.

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This commit is contained in:
Russel Winder
2009-08-10 11:03:17 +01:00
parent b833381c4a
commit 9781f49f5d
2 changed files with 30 additions and 31 deletions
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22
loader/SConscript
View File

@@ -65,11 +65,29 @@ def createKernelSFile(target, source, env):
.incbin "%s"
''' % (os.path.splitext(image.name)[0], image.path))
def createMainC(target, source, env):
with open(source[0].path) as inFile:
with open(target[0].path, 'w') as outFile:
externs = ''
declarations = ''
loads = ''
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)
declarations += 'void *%s_entry = NULL;\n' % (name,)
loads += 'printf("Loading the %s...\\n");\nload_image(&%s_entry, _start_%s, _end_%s);\n' %(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)
startAxfS = Command('start.axf.S', images[0], ksymToLds)
kernelS = Command('kernel.S', images + [startAxfS], createKernelSFile)
mainC = Command('main.c', ['main.c.in'] + images, createMainC)
objects = environment.Object(Glob('*.c') + [kernelS, startAxfS])
objects = environment.Object(Glob('*.c') + [kernelS, startAxfS, mainC])
Depends(objects, environment['configFiles'])
Depends(objects, images)
program = environment.Program('final', objects + [environment['baremetal_crt0']])

39
loader/main.c → loader/main.c.in
View File

@@ -95,17 +95,10 @@
* Extern symbols *
*****************/
/* These symbols are defined by the linker scripts. */
extern char _start_kernel[];
extern char _end_kernel[];
extern char _start_mm0[];
extern char _end_mm0[];
extern char _start_fs0[];
extern char _end_fs0[];
extern char _start_test0[];
extern char _end_test0[];
extern char _start_bootdesc[];
extern char _end_bootdesc[];
/* Variable declarations added here for symbols defined by the linker scripts. */
__EXTERNAL_SYMBOLS_EDIT_MARKER__
/* This is a kernel symbol exported to loader's linker script from kernel build */
extern char bkpt_phys_to_virt[];
@@ -118,29 +111,17 @@ static void load_image(void **entry, char *start, char *end);
int
main(void)
{
void *kernel_entry = NULL;
void *mm0_entry = NULL;
void *fs0_entry = NULL;
void *test0_entry = NULL;
void *bootdesc_entry = NULL;
/* Declarations added here.*/
__DECLARATIONS_EDIT_MARKER__
arch_init();
printf("elf-loader:\tStarted\n");
printf("Loading the kernel...\n");
load_image(&kernel_entry, _start_kernel, _end_kernel);
/* Loader statements added here. */
printf("Loading the bootdesc\n");
load_image(&bootdesc_entry, _start_bootdesc, _end_bootdesc);
printf("Loading mm0\n");
load_image(&mm0_entry, _start_mm0, _end_mm0);
printf("Loading fs0\n");
load_image(&fs0_entry, _start_fs0, _end_fs0);
printf("Loading test0\n");
load_image(&test0_entry, _start_test0, _end_test0);
__LOAD_STATEMENTS_EDIT_MARKER__
printf("elf-loader:\tkernel entry point is %p\n", kernel_entry);
arch_start_kernel(kernel_entry);