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Changes in README. Fixes to fault handling.

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Yet to investigate why adding a printf format attribute to
stdio.h does not generate warnings for invalid arguments to printf.
This commit is contained in:
Bahadir Balban
2008-03-16 14:58:47 +00:00
parent 1cc6a87547
commit 0f4a4ae5b4
8 changed files with 83 additions and 46 deletions
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13
tasks/mm0/src/fault.c
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@@ -271,10 +271,10 @@ int copy_on_write(struct fault_data *fault)
* when there are shadows one is created because a fork had just
* happened, in which case all shadows are rendered read-only.
*/
if (!(vmo->flags & VM_WRITE)) {
if (!(vmo_link->obj->flags & VM_WRITE)) {
if (!(shadow_link = vma_create_shadow()))
return -ENOMEM;
printf("%s: Created a shadow.\n", __TASKNAME__);
/* Initialise the shadow */
shadow = shadow_link->obj;
shadow->refcnt = 1;
@@ -328,7 +328,7 @@ int copy_on_write(struct fault_data *fault)
/* Update page details */
spin_lock(&new_page->lock);
new_page->refcnt = 1;
new_page->refcnt = 0;
new_page->owner = copier_link->obj;
new_page->offset = file_offset;
new_page->virtual = 0;
@@ -343,6 +343,8 @@ int copy_on_write(struct fault_data *fault)
(void *)page_align(fault->address), 1,
(reason & VM_READ) ? MAP_USR_RO_FLAGS : MAP_USR_RW_FLAGS,
fault->task->tid);
printf("%s: Mapped 0x%x as writable to tid %d.\n", __TASKNAME__,
page_align(fault->address), fault->task->tid);
/*
* Finished handling the actual fault, now check for possible
@@ -403,11 +405,14 @@ int __do_page_fault(struct fault_data *fault)
__TASKNAME__);
BUG();
}
/* Map it to faulty task */
l4_map((void *)page_to_phys(page),
(void *)page_align(fault->address), 1,
(reason & VM_READ) ? MAP_USR_RO_FLAGS : MAP_USR_RW_FLAGS,
fault->task->tid);
printf("%s: Mapped 0x%x as readable to tid %d.\n", __TASKNAME__,
page_align(fault->address), fault->task->tid);
}
/* Handle write */
@@ -435,6 +440,8 @@ int __do_page_fault(struct fault_data *fault)
(void *)page_align(fault->address), 1,
(reason & VM_READ) ? MAP_USR_RO_FLAGS : MAP_USR_RW_FLAGS,
fault->task->tid);
printf("%s: Mapped 0x%x as writable to tid %d.\n", __TASKNAME__,
page_align(fault->address), fault->task->tid);
}
/* FIXME: Just do fs files for now, anon shm objects later. */
BUG_ON((vma_flags & VMA_SHARED) && (vma_flags & VMA_ANONYMOUS));