Fixed lots of issues with mm0 initialization, final one was an oversized do_munmap.

test0 now successfully runs its beginning.
test0 SConscript has a dependency problem.

Issues to be investigated:
- vm_file and vnodes need to be merged fully in all functions.
- libposix shared page references need to be removed.
- Any references to VFS_TID, PAGER_TID need to be removed.

conts/posix/libposix/init.c

@@ -1,23 +0,0 @@
-/*
- * Main entry point for posix services and applications.
- *
- * Copyright (C) 2007-2009 Bahadir Balban
- */
-#include <shpage.h>
-#include <posix_init.h>
-#include <libposix.h>
-
-void posix_service_init(void)
-{
-	/* Non-pager tasks initialise their shared communication page */
-	BUG_ON(self_tid() != VFS_TID);
-	shared_page_init();
-}
-
-void libposix_init(void)
-{
-	/* Shall only be run by posix applications */
-	BUG_ON(self_tid() == PAGER_TID || self_tid() == VFS_TID);
-	shared_page_init();
-}
-

conts/posix/mm0/include/memfs/memfs.h

@@ -42,7 +42,7 @@
 #define MEMFS_TOTAL_SIZE		SZ_4MB
 #define MEMFS_TOTAL_INODES		128
 #define MEMFS_TOTAL_BLOCKS		2000
-#define MEMFS_FMAX_BLOCKS		60
+#define MEMFS_FMAX_BLOCKS		120
 #define MEMFS_BLOCK_SIZE		PAGE_SIZE
 #define MEMFS_MAGIC			0xB
 #define MEMFS_NAME			"memfs"

conts/posix/mm0/mm/init.c

@@ -467,10 +467,12 @@ void copy_init_process(void)
 
 	/*
 	 * Map an anonymous region and prefault it.
+	 * Its got to be from __end, because we haven't
+	 * unmapped .init section yet (where map_start normally lies).
 	 */
 	if (IS_ERR(mapped =
-		   do_mmap(0, 0, self, 0,
-			   VMA_ANONYMOUS | VM_READ |
+		   do_mmap(0, 0, self, page_align_up(__end),
+			   VMA_ANONYMOUS | VM_READ | VMA_FIXED |
 			   VM_WRITE | VM_EXEC | VMA_PRIVATE,
 			   __pfn(img_size)))) {
 		printf("FATAL: do_mmap: failed with %d.\n",
@@ -496,7 +498,7 @@ void copy_init_process(void)
 	sys_close(find_task(self_tid()), fd);
 
 	/* Unmap anon region */
-	do_munmap(self, (unsigned long)mapped, img_size);
+	do_munmap(self, (unsigned long)mapped, __pfn(img_size));
 
 	/* Unmap raw virtual range for image memory */
 	l4_unmap_helper(init_img_start,__pfn(img_size));

conts/posix/mm0/mm/memory.c

@@ -157,6 +157,7 @@ void *pager_map_file_range(struct vm_file *f, unsigned long byte_offset,
 	return (void *)((unsigned long)page | (PAGE_MASK & byte_offset));
 }
 
+/* FIXME: PAGE_COLOR!!! */
 void *pager_validate_map_user_range2(struct tcb *user, void *userptr,
 				    unsigned long size, unsigned int vm_flags)
 {

conts/posix/mm0/mm/pagers.c

@@ -97,8 +97,8 @@ int file_page_out(struct vm_object *vm_obj, unsigned long page_offset)
 	/* Map the page to self */
 	l4_map(paddr, vaddr, 1, MAP_USR_RW_FLAGS, self_tid());
 
-	printf("%s/%s: Writing to vnode %lu, at pgoff 0x%lu, %d pages, buf at %p\n",
-		__TASKNAME__, __FUNCTION__, vm_file_to_vnum(f), page_offset, 1, vaddr);
+	//printf("%s/%s: Writing to vnode %lu, at pgoff 0x%lu, %d pages, buf at %p\n",
+	//	__TASKNAME__, __FUNCTION__, vm_file_to_vnum(f), page_offset, 1, vaddr);
 
 	/* Syscall to vfs to write page back to file. */
 	if ((err = vfs_write(vm_file_to_vnum(f), page_offset, 1, vaddr)) < 0)

conts/posix/mm0/mm/task.c

@@ -491,21 +491,24 @@ int task_map_stack(struct vm_file *f, struct exec_file_desc *efd, struct tcb *ta
 		return (int)mapped;
 	}
 
-	/* Map the stack's part that will contain args and environment */
-	if (IS_ERR(args_on_stack =
-		   pager_validate_map_user_range2(task,
-						  (void *)task->args_start,
-						  stack_used,
-						  VM_READ | VM_WRITE))) {
-		return (int)args_on_stack;
+	/* If args or env use any bytes */
+	if (stack_used) {
+		/* Map the stack's part that will contain args and environment */
+		if (IS_ERR(args_on_stack =
+			   pager_validate_map_user_range2(task,
+							  (void *)task->args_start,
+							  stack_used,
+							  VM_READ | VM_WRITE))) {
+			return (int)args_on_stack;
+		}
+
+		/* Copy arguments and env */
+		task_args_to_user(args_on_stack, args, env);
+
+		/* Unmap task's those stack pages from pager */
+		pager_unmap_pages(args_on_stack, arg_pages);
 	}
 
-	/* Copy arguments and env */
-	task_args_to_user(args_on_stack, args, env);
-
-	/* Unmap task's those stack pages from pager */
-	pager_unmap_pages(args_on_stack, arg_pages);
-
 	return 0;
 }
 
@@ -536,7 +539,7 @@ int task_map_bss(struct vm_file *f, struct exec_file_desc *efd, struct tcb *task
 		/* Get the page */
 		last_data_page = task_virt_to_page(task, task->data_end);
 
-		/* Map the page */
+		/* Map the page. FIXME: PAGE COLOR!!! */
 		pagebuf = l4_map_helper((void *)page_to_phys(last_data_page), 1);
 
 		/* Find the bss offset */

conts/posix/test0/SConscript

@@ -9,7 +9,7 @@ sys.path.append('../../../../')
 from config.lib import *
 from tools.pyelf.lmanext import *
 
-src = [Glob('*.[c]') + Glob('test_exec.S') + Glob('src/*.c') + Glob('src/arch/arm/*.c')]
+src = [Glob('*.c') + Glob('test_exec.S') + Glob('src/*.c') + Glob('src/arch/arm/*.c')]
 
 asm_string = \
 '''
@@ -41,6 +41,7 @@ test_exec_src = Glob('src/test_exec/*.[cS]')
 test_exec_objs = test_exec_env.Object(test_exec_src)
 test_exec = test_exec_env.Program('src/test_exec/test_exec', test_exec_objs)
 test_exec_asm = Command('test_exec.S', test_exec, generate_incbin_asm)
+Depends(test_exec, test_exec_objs)
 
 env.Append(LIBS = ['posix', 'c-userspace'])
 env.Append(LINKFLAGS = ['-T' + lma_lds[0].path, '-u_start'])
@@ -49,7 +50,6 @@ env.Replace(PROGSUFFIX = '')
 objs = env.Object(src + test_exec_asm)
 test0 = env.Program('test0', objs)
 
-
 elf_wrap_string = \
 '''
 .align 4
@@ -75,11 +75,8 @@ elf_wrap_env.Append(LINKFLAGS = '-T' + elf_wrapped_lds[0].path)
 elf_wrap_objs = elf_wrap_env.Object(elf_wrapped_asm)
 test0_elf_elf = elf_wrap_env.Program('test0_elf.elf', elf_wrap_objs)
 
-Depends(test0, objs)
 Depends(test0, lma_lds)
-Depends(lma_lds, previmage)
 Depends(test0, test_exec)
-Depends(test0_elf_elf, elf_wrap_objs)
-Depends(test0_elf_elf, test0)
+Depends(lma_lds, previmage)
 Depends(test0_elf_elf, elf_wrapped_lds)
 Return('test0_elf_elf')

conts/posix/test0/container.c

@@ -16,9 +16,6 @@ void __container_init(void)
 	/* Generic L4 thread initialisation */
 	__l4_init();
 
-	/* Initialise posix library for application */
-	libposix_init();
-
 	/* Entry to main */
 	main();
 }

conts/posix/test0/include/linker.lds.in

@@ -1,24 +1,14 @@
 /*
- * Simple linker script for userspace or svc tasks.
+ * Userspace linker script
  *
- * Copyright (C) 2007 Bahadir Balban
+ * Copyright (C) 2007 - 2009 Bahadir Balban
  */
 
-/*
- * The only catch with this linker script is that everything
- * is linked starting at virtual_base, and loaded starting
- * at physical_base. virtual_base is the predefined region
- * of virtual memory for userland applications. physical_base
- * is determined at build-time, it is one of the subsequent pages
- * that come after the kernel image's load area.
- */
-/* USER_AREA_START, see memlayout.h */
 virtual_base = 0x10000000;
 physical_base = %s;
-__stack = (0x20000000 - 0x1000 - 8); /* First page before the env/args */
-/* INCLUDE "include/physical_base.lds" */
 
-/* physical_base = 0x228000; */
+__stack = (0x20000000 - 0x1000 - 8); /* First page before the env/args */
+
 offset = virtual_base - physical_base;
 
 ENTRY(_start)
@@ -27,18 +17,32 @@ SECTIONS
 {
 	. = virtual_base;
 	_start_text = .;
-	.text : AT (ADDR(.text) - offset) { *(.text.head) *(.text) }
-	/* rodata is needed else your strings will link at physical! */
-	.rodata : AT (ADDR(.rodata) - offset) { *(.rodata) }
-	.rodata1 : AT (ADDR(.rodata1) - offset) { *(.rodata1) }
-	.data : AT (ADDR(.data) - offset)
-	{
-		. = ALIGN(4K);
+	.text : AT (ADDR(.text) - offset) {
+		*(.text.head)
+		*(.text)
+	}
+	.rodata : AT (ADDR(.rodata) - offset) {
+		*(.rodata)
+	}
+	.rodata1 : AT (ADDR(.rodata1) - offset) {
+		*(.rodata1)
+	}
+
+	. = ALIGN(4K);
+	.data : AT (ADDR(.data) - offset) {
 		_start_test_exec = .;
 		*(.testexec)
 		_end_test_exec = .;
 		*(.data)
 	}
-	.bss : AT (ADDR(.bss) - offset) { *(.bss) }
+	.got : AT (ADDR(.got) - offset) {
+		*(.got)
+	}
+	.got.plt : AT (ADDR(.got.plt) - offset) {
+		*(.got.plt)
+	}
+	.bss : AT (ADDR(.bss) - offset) {
+		*(.bss)
+	}
 	_end = .;
 }

conts/posix/test0/src/test_exec/container.c

@@ -16,9 +16,6 @@ void __container_init(void)
 	/* Generic L4 thread initialisation */
 	__l4_init();
 
-	/* Initialise posix library for application */
-	libposix_init();
-
 	/* Entry to main */
 	main();
 }

src/arch/arm/exception.c

@@ -19,7 +19,7 @@
 #include INC_SUBARCH(mm.h)
 
 /* Abort debugging conditions */
- #define DEBUG_ABORTS
+// #define DEBUG_ABORTS
 #if defined (DEBUG_ABORTS)
 #define dbg_abort(...)	dprintk(__VA_ARGS__)
 #else