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add PTATTR_NO_EXECUTE

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NAKAMURA Gou
2014-04-08 19:17:42 +09:00
parent f60b37ea1b
commit b31a1b6db2
4 changed files with 30 additions and 12 deletions
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3
arch/x86/kernel/include/arch-memory.h
View File

@ -114,6 +114,7 @@ enum ihk_mc_pt_attribute {
PTATTR_WRITABLE = 0x02,
PTATTR_USER = 0x04,
PTATTR_LARGEPAGE = 0x80,
PTATTR_NO_EXECUTE = 0x8000000000000000,
PTATTR_UNCACHABLE = 0x10000,
PTATTR_FOR_USER = 0x20000,
};
@ -156,5 +157,5 @@ void *map_fixed_area(unsigned long phys, unsigned long size, int uncachable);
#define AP_TRAMPOLINE_SIZE 0x4000
/* Local is cachable */
#define IHK_IKC_QUEUE_PT_ATTR (PTATTR_WRITABLE | PTATTR_UNCACHABLE)
#define IHK_IKC_QUEUE_PT_ATTR (PTATTR_NO_EXECUTE | PTATTR_WRITABLE | PTATTR_UNCACHABLE)
#endif

12
arch/x86/kernel/memory.c
View File

@ -1666,21 +1666,25 @@ void *map_fixed_area(unsigned long phys, unsigned long size, int uncachable)
{
unsigned long poffset, paligned;
int i, npages;
int flag = PTATTR_WRITABLE | PTATTR_ACTIVE;
void *v = (void *)fixed_virt;
enum ihk_mc_pt_attribute attr;
poffset = phys & (PAGE_SIZE - 1);
paligned = phys & PAGE_MASK;
npages = (poffset + size + PAGE_SIZE - 1) >> PAGE_SHIFT;
attr = PTATTR_WRITABLE | PTATTR_ACTIVE;
#if 0 /* In the case of LAPIC MMIO, something will happen */
attr |= PTATTR_NO_EXECUTE;
#endif
if (uncachable) {
flag |= PTATTR_UNCACHABLE;
attr |= PTATTR_UNCACHABLE;
}
kprintf("map_fixed: %lx => %p (%d pages)\n", paligned, v, npages);
for (i = 0; i < npages; i++) {
if(__set_pt_page(init_pt, (void *)fixed_virt, paligned, flag)){
if(__set_pt_page(init_pt, (void *)fixed_virt, paligned, attr)){
return NULL;
}
@ -1695,7 +1699,7 @@ void *map_fixed_area(unsigned long phys, unsigned long size, int uncachable)
void init_low_area(struct page_table *pt)
{
set_pt_large_page(pt, 0, 0, PTATTR_WRITABLE);
set_pt_large_page(pt, 0, 0, PTATTR_NO_EXECUTE|PTATTR_WRITABLE);
}
static void init_vsyscall_area(struct page_table *pt)

18
kernel/host.c
View File

@ -69,13 +69,16 @@ static int process_msg_prepare_process(unsigned long rphys)
unsigned long flags;
uintptr_t interp_obase = -1;
uintptr_t interp_nbase = -1;
enum ihk_mc_pt_attribute attr;
attr = PTATTR_NO_EXECUTE | PTATTR_WRITABLE | PTATTR_FOR_USER;
sz = sizeof(struct program_load_desc)
+ sizeof(struct program_image_section) * 16;
npages = ((rphys + sz - 1) >> PAGE_SHIFT) - (rphys >> PAGE_SHIFT) + 1;
phys = ihk_mc_map_memory(NULL, rphys, sz);
if((p = ihk_mc_map_virtual(phys, npages, PTATTR_WRITABLE | PTATTR_FOR_USER)) == NULL){
if((p = ihk_mc_map_virtual(phys, npages, attr)) == NULL){
ihk_mc_unmap_memory(NULL, phys, sz);
return -ENOMEM;
}
@ -264,7 +267,7 @@ static int process_msg_prepare_process(unsigned long rphys)
args_envs_rp = ihk_mc_map_memory(NULL, (unsigned long)p->args, p->args_len);
dkprintf("args_envs_rp: 0x%lX\n", args_envs_rp);
if((args_envs_r = (char *)ihk_mc_map_virtual(args_envs_rp, args_envs_npages,
PTATTR_WRITABLE | PTATTR_FOR_USER)) == NULL){
attr)) == NULL){
goto err;
}
dkprintf("args_envs_r: 0x%lX\n", args_envs_r);
@ -285,7 +288,7 @@ static int process_msg_prepare_process(unsigned long rphys)
args_envs_rp = ihk_mc_map_memory(NULL, (unsigned long)p->envs, p->envs_len);
dkprintf("args_envs_rp: 0x%lX\n", args_envs_rp);
if((args_envs_r = (char *)ihk_mc_map_virtual(args_envs_rp, args_envs_npages,
PTATTR_WRITABLE | PTATTR_FOR_USER)) == NULL){
attr)) == NULL){
goto err;
}
dkprintf("args_envs_r: 0x%lX\n", args_envs_r);
@ -363,6 +366,9 @@ static void process_msg_init_acked(struct ihk_ikc_channel_desc *c, unsigned long
{
struct ikc_scd_init_param *param = (void *)pphys;
struct syscall_params *lparam;
enum ihk_mc_pt_attribute attr;
attr = PTATTR_NO_EXECUTE | PTATTR_WRITABLE | PTATTR_FOR_USER;
lparam = &cpu_local_var(scp);
if(cpu_local_var(syscall_channel2) == c)
@ -372,7 +378,7 @@ static void process_msg_init_acked(struct ihk_ikc_channel_desc *c, unsigned long
REQUEST_PAGE_COUNT * PAGE_SIZE);
if((lparam->request_va = ihk_mc_map_virtual(lparam->request_pa,
REQUEST_PAGE_COUNT,
PTATTR_WRITABLE | PTATTR_FOR_USER)) == NULL){
attr)) == NULL){
// TODO:
panic("ENOMEM");
}
@ -383,7 +389,7 @@ static void process_msg_init_acked(struct ihk_ikc_channel_desc *c, unsigned long
PAGE_SIZE);
if((lparam->doorbell_va = ihk_mc_map_virtual(lparam->doorbell_pa,
DOORBELL_PAGE_COUNT,
PTATTR_WRITABLE | PTATTR_FOR_USER)) == NULL){
attr)) == NULL){
// TODO:
panic("ENOMEM");
}
@ -392,7 +398,7 @@ static void process_msg_init_acked(struct ihk_ikc_channel_desc *c, unsigned long
lparam->post_pa = ihk_mc_map_memory(NULL, param->post_page,
PAGE_SIZE);
if((lparam->post_va = ihk_mc_map_virtual(lparam->post_pa, 1,
PTATTR_WRITABLE | PTATTR_FOR_USER)) == NULL){
attr)) == NULL){
// TODO:
panic("ENOMEM");
}

9
kernel/process.c
View File

@ -348,6 +348,7 @@ int update_process_page_table(struct process *process,
attr = flag | PTATTR_USER | PTATTR_FOR_USER;
attr |= (range->flag & VR_PROT_WRITE)? PTATTR_WRITABLE: 0;
attr |= (range->flag & VR_PROT_EXEC)? 0: PTATTR_NO_EXECUTE;
p = range->start;
while (p < range->end) {
@ -690,6 +691,10 @@ enum ihk_mc_pt_attribute vrflag_to_ptattr(unsigned long flag)
attr |= PTATTR_WRITABLE;
}
if (!(flag & VR_PROT_EXEC)) {
attr |= PTATTR_NO_EXECUTE;
}
return attr;
}
@ -1198,7 +1203,9 @@ static int do_page_fault_process(struct process *proc, void *fault_addr0, uint64
if (((range->flag & VR_PROT_MASK) == VR_PROT_NONE)
|| ((reason & PF_WRITE)
&& !(range->flag & VR_PROT_WRITE))) {
&& !(range->flag & VR_PROT_WRITE))
|| ((reason & PF_INSTR)
&& !(range->flag & VR_PROT_EXEC))) {
error = -EFAULT;
kprintf("[%d]do_page_fault_process(%p,%lx,%lx):"
"access denied. %d\n",