diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/um/Makefile | 2 | ||||
| -rw-r--r-- | arch/um/sys-i386/ldt.c | 35 |
2 files changed, 20 insertions, 17 deletions
diff --git a/arch/um/Makefile b/arch/um/Makefile index e55d32e903bc..1b12feeba368 100644 --- a/arch/um/Makefile +++ b/arch/um/Makefile @@ -17,7 +17,7 @@ core-y += $(ARCH_DIR)/kernel/ \ # Have to precede the include because the included Makefiles reference them. SYMLINK_HEADERS := archparam.h system.h sigcontext.h processor.h ptrace.h \ - module.h vm-flags.h elf.h + module.h vm-flags.h elf.h ldt.h SYMLINK_HEADERS := $(foreach header,$(SYMLINK_HEADERS),include/asm-um/$(header)) # XXX: The "os" symlink is only used by arch/um/include/os.h, which includes diff --git a/arch/um/sys-i386/ldt.c b/arch/um/sys-i386/ldt.c index 6360f1c958d0..17746b4c08ff 100644 --- a/arch/um/sys-i386/ldt.c +++ b/arch/um/sys-i386/ldt.c @@ -228,7 +228,7 @@ static int read_ldt(void __user * ptr, unsigned long bytecount) size = LDT_ENTRY_SIZE*LDT_DIRECT_ENTRIES; if(size > bytecount) size = bytecount; - if(copy_to_user(ptr, ldt->entries, size)) + if(copy_to_user(ptr, ldt->u.entries, size)) err = -EFAULT; bytecount -= size; ptr += size; @@ -239,7 +239,7 @@ static int read_ldt(void __user * ptr, unsigned long bytecount) size = PAGE_SIZE; if(size > bytecount) size = bytecount; - if(copy_to_user(ptr, ldt->pages[i], size)){ + if(copy_to_user(ptr, ldt->u.pages[i], size)){ err = -EFAULT; break; } @@ -321,10 +321,11 @@ static int write_ldt(void __user * ptr, unsigned long bytecount, int func) i*LDT_ENTRIES_PER_PAGE <= ldt_info.entry_number; i++){ if(i == 0) - memcpy(&entry0, ldt->entries, sizeof(entry0)); - ldt->pages[i] = (struct ldt_entry *) - __get_free_page(GFP_KERNEL|__GFP_ZERO); - if(!ldt->pages[i]){ + memcpy(&entry0, ldt->u.entries, + sizeof(entry0)); + ldt->u.pages[i] = (struct ldt_entry *) + __get_free_page(GFP_KERNEL|__GFP_ZERO); + if(!ldt->u.pages[i]){ err = -ENOMEM; /* Undo the change in host */ memset(&ldt_info, 0, sizeof(ldt_info)); @@ -332,8 +333,9 @@ static int write_ldt(void __user * ptr, unsigned long bytecount, int func) goto out_unlock; } if(i == 0) { - memcpy(ldt->pages[0], &entry0, sizeof(entry0)); - memcpy(ldt->pages[0]+1, ldt->entries+1, + memcpy(ldt->u.pages[0], &entry0, + sizeof(entry0)); + memcpy(ldt->u.pages[0]+1, ldt->u.entries+1, sizeof(entry0)*(LDT_DIRECT_ENTRIES-1)); } ldt->entry_count = (i + 1) * LDT_ENTRIES_PER_PAGE; @@ -343,9 +345,9 @@ static int write_ldt(void __user * ptr, unsigned long bytecount, int func) ldt->entry_count = ldt_info.entry_number + 1; if(ldt->entry_count <= LDT_DIRECT_ENTRIES) - ldt_p = ldt->entries + ldt_info.entry_number; + ldt_p = ldt->u.entries + ldt_info.entry_number; else - ldt_p = ldt->pages[ldt_info.entry_number/LDT_ENTRIES_PER_PAGE] + + ldt_p = ldt->u.pages[ldt_info.entry_number/LDT_ENTRIES_PER_PAGE] + ldt_info.entry_number%LDT_ENTRIES_PER_PAGE; if(ldt_info.base_addr == 0 && ldt_info.limit == 0 && @@ -501,8 +503,8 @@ long init_new_ldt(struct mmu_context_skas * new_mm, */ down(&from_mm->ldt.semaphore); if(from_mm->ldt.entry_count <= LDT_DIRECT_ENTRIES){ - memcpy(new_mm->ldt.entries, from_mm->ldt.entries, - sizeof(new_mm->ldt.entries)); + memcpy(new_mm->ldt.u.entries, from_mm->ldt.u.entries, + sizeof(new_mm->ldt.u.entries)); } else{ i = from_mm->ldt.entry_count / LDT_ENTRIES_PER_PAGE; @@ -512,9 +514,10 @@ long init_new_ldt(struct mmu_context_skas * new_mm, err = -ENOMEM; break; } - new_mm->ldt.pages[i] = (struct ldt_entry*)page; - memcpy(new_mm->ldt.pages[i], - from_mm->ldt.pages[i], PAGE_SIZE); + new_mm->ldt.u.pages[i] = + (struct ldt_entry *) page; + memcpy(new_mm->ldt.u.pages[i], + from_mm->ldt.u.pages[i], PAGE_SIZE); } } new_mm->ldt.entry_count = from_mm->ldt.entry_count; @@ -532,7 +535,7 @@ void free_ldt(struct mmu_context_skas * mm) if(!ptrace_ldt && mm->ldt.entry_count > LDT_DIRECT_ENTRIES){ i = mm->ldt.entry_count / LDT_ENTRIES_PER_PAGE; while(i-- > 0){ - free_page((long )mm->ldt.pages[i]); + free_page((long )mm->ldt.u.pages[i]); } } mm->ldt.entry_count = 0; |