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add mcexec's PTE cleaning to munmap()/mmap(MAP_FIXED)

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The correction of the problem that MKL application does not start
This commit is contained in:
NAKAMURA Gou
2013-09-05 10:12:56 +09:00
parent 0e0684cd1c
commit 47722baf2e
2 changed files with 58 additions and 0 deletions
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37
executer/kernel/syscall.c
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@ -600,6 +600,38 @@ static void __return_syscall(struct mcctrl_channel *c, int ret)
c->param.response_va->status = 1;
}
static void clear_pte_range(uintptr_t addr, uintptr_t len)
{
struct mm_struct *mm = current->mm;
struct vm_area_struct *vma;
uintptr_t start;
uintptr_t end;
down_read(&mm->mmap_sem);
vma = find_vma(mm, 0);
if (!vma) {
printk("clear_pte_range(%lx,%lx):find_vma(0) failed\n",
addr, len);
up_read(&mm->mmap_sem);
return;
}
start = addr;
end = addr + len;
if (start < vma->vm_start) {
start = vma->vm_start;
}
if (vma->vm_end < end) {
end = vma->vm_end;
}
if (start < end) {
zap_vma_ptes(vma, start, end-start);
}
up_read(&mm->mmap_sem);
return;
}
int __do_in_kernel_syscall(ihk_os_t os, struct mcctrl_channel *c, struct syscall_request *sc)
{
int error;
@ -607,6 +639,11 @@ int __do_in_kernel_syscall(ihk_os_t os, struct mcctrl_channel *c, struct syscall
dprintk("__do_in_kernel_syscall(%p,%p,%p %ld)\n", os, c, sc, sc->number);
switch (sc->number) {
case __NR_munmap:
clear_pte_range(sc->args[0], sc->args[1]);
ret = 0;
break;
default:
error = -ENOSYS;
goto out;