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Merge branch 'master' of postpeta.pccluster.org:mckernel

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This commit is contained in:
Balazs Gerofi bgerofi@riken.jp
2014-04-11 15:41:25 +09:00
parent b93db2411c 56f0d3b29f
commit 40fdb8865b
8 changed files with 93 additions and 20 deletions
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38
arch/x86/kernel/cpu.c
View File

@ -311,9 +311,45 @@ static void enable_page_protection_fault(void)
return;
}
static int no_execute_available = 0;
static void enable_no_execute(void)
{
unsigned long efer;
if (!no_execute_available) {
return;
}
efer = rdmsr(MSR_EFER);
#define IA32_EFER_NXE (1UL << 11)
efer |= IA32_EFER_NXE;
wrmsr(MSR_EFER, efer);
return;
}
static void check_no_execute(void)
{
uint32_t edx;
extern void enable_ptattr_no_execute(void);
/* check Execute Disable Bit available bit */
asm ("cpuid" : "=d" (edx) : "a" (0x80000001) : "%rbx", "%rcx");
no_execute_available = (edx & (1 << 20))? 1: 0;
kprintf("no_execute_available: %d\n", no_execute_available);
if (no_execute_available) {
enable_ptattr_no_execute();
}
return;
}
void init_cpu(void)
{
enable_page_protection_fault();
enable_no_execute();
init_fpu();
init_lapic();
init_syscall();
@ -330,6 +366,8 @@ void setup_x86(void)
init_page_table();
check_no_execute();
init_cpu();
kprintf("setup_x86 done.\n");

7
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,
};
@ -142,8 +143,8 @@ static inline uintptr_t pte_get_phys(pte_t *ptep)
}
struct page_table;
void set_pte(pte_t *ppte, unsigned long phys, int attr);
pte_t *get_pte(struct page_table *pt, void *virt, int attr);
void set_pte(pte_t *ppte, unsigned long phys, enum ihk_mc_pt_attribute attr);
pte_t *get_pte(struct page_table *pt, void *virt, enum ihk_mc_pt_attribute attr);
void *early_alloc_page(void);
void *get_last_early_heap(void);
@ -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

28
arch/x86/kernel/memory.c
View File

@ -219,7 +219,15 @@ static struct page_table *__alloc_new_pt(enum ihk_mc_ap_flag ap_flag)
* but L2 and L1 do not!
*/
#define ATTR_MASK (PTATTR_WRITABLE | PTATTR_USER | PTATTR_ACTIVE)
static enum ihk_mc_pt_attribute attr_mask = PTATTR_WRITABLE | PTATTR_USER | PTATTR_ACTIVE;
#define ATTR_MASK attr_mask
void enable_ptattr_no_execute(void)
{
attr_mask |= PTATTR_NO_EXECUTE;
return;
}
#if 0
static unsigned long attr_to_l4attr(enum ihk_mc_pt_attribute attr)
{
@ -266,7 +274,7 @@ static unsigned long attr_to_l1attr(enum ihk_mc_pt_attribute attr)
| ((uint64_t)(l1i) << PTL1_SHIFT) \
)
void set_pte(pte_t *ppte, unsigned long phys, int attr)
void set_pte(pte_t *ppte, unsigned long phys, enum ihk_mc_pt_attribute attr)
{
if (attr & PTATTR_LARGEPAGE) {
*ppte = phys | attr_to_l2attr(attr) | PFL2_SIZE;
@ -285,7 +293,7 @@ void set_pte(pte_t *ppte, unsigned long phys, int attr)
* and returns a pointer to the PTE corresponding to the
* virtual address.
*/
pte_t *get_pte(struct page_table *pt, void *virt, int attr, enum ihk_mc_ap_flag ap_flag)
pte_t *get_pte(struct page_table *pt, void *virt, enum ihk_mc_pt_attribute attr, enum ihk_mc_ap_flag ap_flag)
{
int l4idx, l3idx, l2idx, l1idx;
unsigned long v = (unsigned long)virt;
@ -341,7 +349,7 @@ pte_t *get_pte(struct page_table *pt, void *virt, int attr, enum ihk_mc_ap_flag
#endif
static int __set_pt_page(struct page_table *pt, void *virt, unsigned long phys,
int attr)
enum ihk_mc_pt_attribute attr)
{
int l4idx, l3idx, l2idx, l1idx;
unsigned long v = (unsigned long)virt;
@ -1666,21 +1674,25 @@ 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 +1707,7 @@ 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)

1
executer/include/uprotocol.h
View File

@ -65,6 +65,7 @@ struct program_load_desc {
int cpu;
int pid;
int err;
int stack_prot;
unsigned long entry;
unsigned long user_start;
unsigned long user_end;

7
executer/user/mcexec.c
View File

@ -159,6 +159,7 @@ struct program_load_desc *load_elf(FILE *fp, char **interp_pathp)
fseek(fp, hdr.e_phoff, SEEK_SET);
j = 0;
desc->num_sections = nhdrs;
desc->stack_prot = PROT_READ | PROT_WRITE | PROT_EXEC; /* default */
for (i = 0; i < hdr.e_phnum; i++) {
if (fread(&phdr, sizeof(phdr), 1, fp) < 1) {
__eprintf("Loading phdr failed (%d)\n", i);
@ -205,6 +206,12 @@ struct program_load_desc *load_elf(FILE *fp, char **interp_pathp)
load_addr = phdr.p_vaddr - phdr.p_offset;
}
}
if (phdr.p_type == PT_GNU_STACK) {
desc->stack_prot = PROT_NONE;
desc->stack_prot |= (phdr.p_flags & PF_R)? PROT_READ: 0;
desc->stack_prot |= (phdr.p_flags & PF_W)? PROT_WRITE: 0;
desc->stack_prot |= (phdr.p_flags & PF_X)? PROT_EXEC: 0;
}
}
desc->pid = getpid();
desc->entry = hdr.e_entry;

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");
}

1
kernel/include/syscall.h
View File

@ -109,6 +109,7 @@ struct program_load_desc {
int cpu;
int pid;
int err;
int stack_prot;
unsigned long entry;
unsigned long user_start;
unsigned long user_end;

13
kernel/process.c
View File

@ -347,6 +347,7 @@ 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) {
@ -689,6 +690,10 @@ 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;
}
@ -1197,7 +1202,9 @@ 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",
@ -1325,8 +1332,8 @@ int init_process_stack(struct process *process, struct program_load_desc *pn,
start = end - size;
vrflag = VR_STACK | VR_DEMAND_PAGING;
vrflag |= VR_PROT_READ | VR_PROT_WRITE | VR_PROT_EXEC;
vrflag |= VRFLAG_PROT_TO_MAXPROT(vrflag);
vrflag |= PROT_TO_VR_FLAG(pn->stack_prot);
vrflag |= VR_MAXPROT_READ | VR_MAXPROT_WRITE | VR_MAXPROT_EXEC;
#define NOPHYS ((uintptr_t)-1)
if ((rc = add_process_memory_range(process, start, end, NOPHYS,
vrflag, NULL, 0)) != 0) {