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PTE clearing bug due to wrong unmap fixed

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This commit is contained in:
Balazs Gerofi
2012-06-08 18:12:03 +09:00
parent 77296a31a2
commit 8005f8455d
1 changed files with 27 additions and 14 deletions
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41
kernel/host.c
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@@ -18,6 +18,18 @@
#define dkprintf(...)
#endif
void check_mapping_for_proc(struct process *proc, unsigned long addr)
{
unsigned long __phys;
if (aal_mc_pt_virt_to_phys(proc->vm->page_table, (void*)addr, &__phys)) {
kprintf("check_map: no mapping for 0x%lX\n", addr);
}
else {
kprintf("check_map: 0x%lX -> 0x%lX\n", addr, __phys);
}
}
/*
* Communication with host
*/
@@ -71,13 +83,18 @@ static void process_msg_prepare_process(unsigned long rphys)
{
void *_virt = (void *)s;
unsigned long _phys;
aal_mc_pt_virt_to_phys(cpu_local_var(current)->vm->page_table,
_virt, &_phys);
if (aal_mc_pt_virt_to_phys(proc->vm->page_table,
_virt, &_phys)) {
kprintf("ERROR: no mapping for 0x%lX\n", _virt);
}
for (_virt = (void *)s + PAGE_SIZE;
(unsigned long)_virt < e; _virt += PAGE_SIZE) {
unsigned long __phys;
aal_mc_pt_virt_to_phys(cpu_local_var(current)->vm->page_table,
_virt, &__phys);
if (aal_mc_pt_virt_to_phys(proc->vm->page_table,
_virt, &__phys)) {
kprintf("ERROR: no mapping for 0x%lX\n", _virt);
panic("mapping");
}
if (__phys != _phys + PAGE_SIZE) {
kprintf("0x%lX + PAGE_SIZE is not physically contigous, from 0x%lX to 0x%lX\n", _virt - PAGE_SIZE, _phys, __phys);
panic("mondai");
@@ -137,6 +154,7 @@ static void process_msg_prepare_process(unsigned long rphys)
e : proc->vm->region.data_end);
}
}
proc->vm->region.brk_start = proc->vm->region.brk_end =
proc->vm->region.data_end;
proc->vm->region.map_start = proc->vm->region.map_end =
@@ -187,12 +205,9 @@ static void process_msg_prepare_process(unsigned long rphys)
memcpy_long(args_envs, args_envs_r, p->args_len + 8);
/* TODO: add a virtual_unmap function, that really does only unmap
* the virtual address and doesn't drop the physical page itself!! */
//aal_mc_unmap_virtual(args_envs_r, args_envs_npages);
//aal_mc_unmap_memory(NULL, args_envs_rp, p->args_len);
aal_mc_unmap_virtual(args_envs_r, args_envs_npages, 0);
aal_mc_unmap_memory(NULL, args_envs_rp, p->args_len);
dkprintf("envs: 0x%lX, envs_len: %d\n", p->envs, p->envs_len);
// Map in remote physical addr of envs and copy it after args
@@ -208,8 +223,8 @@ static void process_msg_prepare_process(unsigned long rphys)
memcpy_long(args_envs + p->args_len, args_envs_r, p->envs_len + 8);
//aal_mc_unmap_virtual(args_envs_r, args_envs_npages);
//aal_mc_unmap_memory(NULL, args_envs_rp, p->envs_len);
aal_mc_unmap_virtual(args_envs_r, args_envs_npages, 0);
aal_mc_unmap_memory(NULL, args_envs_rp, p->envs_len);
// Update variables
argc = *((int*)(args_envs));
@@ -238,8 +253,6 @@ static void process_msg_prepare_process(unsigned long rphys)
dkprintf("env OK\n");
aal_mc_unmap_virtual(args_envs, ARGENV_PAGE_COUNT, 0);
p->rprocess = (unsigned long)proc;
init_process_stack(proc, argc, argv, envc, env);