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support mremap(2)

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fixes #22
This commit is contained in:
NAKAMURA Gou
2014-07-01 18:52:31 +09:00
parent 90aaf9dc9c
commit 11bb334bd4
7 changed files with 335 additions and 0 deletions
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1
arch/x86/kernel/include/syscall_list.h
View File

@ -40,6 +40,7 @@ SYSCALL_DELEGATED(18, pwrite64)
SYSCALL_DELEGATED(20, writev)
SYSCALL_DELEGATED(21, access)
SYSCALL_HANDLED(24, sched_yield)
SYSCALL_HANDLED(25, mremap)
SYSCALL_HANDLED(28, madvise)
SYSCALL_HANDLED(34, pause)
SYSCALL_HANDLED(39, getpid)

70
arch/x86/kernel/memory.c
View File

@ -1802,6 +1802,76 @@ enum ihk_mc_pt_attribute arch_vrflag_to_ptattr(unsigned long flag, uint64_t faul
return attr;
}
struct move_args {
uintptr_t src;
uintptr_t dest;
};
static int move_one_page(void *arg0, page_table_t pt, pte_t *ptep, void *pgaddr, size_t pgsize)
{
int error;
struct move_args *args = arg0;
uintptr_t dest;
pte_t apte;
uintptr_t phys;
enum ihk_mc_pt_attribute attr;
dkprintf("move_one_page(%p,%p,%p %#lx,%p,%#lx)\n",
arg0, pt, ptep, *ptep, pgaddr, pgsize);
if (pte_is_fileoff(ptep, pgsize)) {
error = -ENOTSUPP;
kprintf("move_one_page(%p,%p,%p %#lx,%p,%#lx):fileoff. %d\n",
arg0, pt, ptep, *ptep, pgaddr, pgsize, error);
goto out;
}
dest = args->dest + ((uintptr_t)pgaddr - args->src);
apte = PTE_NULL;
pte_xchg(ptep, &apte);
phys = apte & PT_PHYSMASK;
attr = apte & ~PT_PHYSMASK;
error = ihk_mc_pt_set_range(pt, (void *)dest,
(void *)(dest + pgsize), phys, attr);
if (error) {
kprintf("move_one_page(%p,%p,%p %#lx,%p,%#lx):"
"set failed. %d\n",
arg0, pt, ptep, *ptep, pgaddr, pgsize, error);
goto out;
}
error = 0;
out:
dkprintf("move_one_page(%p,%p,%p %#lx,%p,%#lx):%d\n",
arg0, pt, ptep, *ptep, pgaddr, pgsize, error);
return error;
}
int move_pte_range(page_table_t pt, void *src, void *dest, size_t size)
{
int error;
struct move_args args;
dkprintf("move_pte_range(%p,%p,%p,%#lx)\n", pt, src, dest, size);
args.src = (uintptr_t)src;
args.dest = (uintptr_t)dest;
error = visit_pte_range(pt, src, src+size, VPTEF_SKIP_NULL,
&move_one_page, &args);
flush_tlb(); /* XXX: TLB flush */
if (error) {
goto out;
}
error = 0;
out:
dkprintf("move_pte_range(%p,%p,%p,%#lx):%d\n",
pt, src, dest, size, error);
return error;
}
void load_page_table(struct page_table *pt)
{
unsigned long pt_addr;