diff options
| -rw-r--r-- | arch/x86/kernel/ldt.c | 3 | ||||
| -rw-r--r-- | arch/x86/kernel/process_64.c | 3 | ||||
| -rw-r--r-- | arch/x86/kernel/tls.c | 7 | ||||
| -rw-r--r-- | include/asm-x86/desc.h | 29 | ||||
| -rw-r--r-- | include/asm-x86/desc_32.h | 15 | ||||
| -rw-r--r-- | include/asm-x86/desc_64.h | 17 |
6 files changed, 34 insertions, 40 deletions
diff --git a/arch/x86/kernel/ldt.c b/arch/x86/kernel/ldt.c index 7eb0c8a..3e872b4 100644 --- a/arch/x86/kernel/ldt.c +++ b/arch/x86/kernel/ldt.c @@ -223,8 +223,7 @@ static int write_ldt(void __user *ptr, unsigned long bytecount, int oldmode) } } - ldt.a = LDT_entry_a(&ldt_info); - ldt.b = LDT_entry_b(&ldt_info); + fill_ldt(&ldt, &ldt_info); if (oldmode) ldt.avl = 0; diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c index 86c310a..f91521e 100644 --- a/arch/x86/kernel/process_64.c +++ b/arch/x86/kernel/process_64.c @@ -457,8 +457,7 @@ static inline void set_32bit_tls(struct task_struct *t, int tls, u32 addr) }; struct desc_struct *desc = (void *)t->thread.tls_array; desc += tls; - desc->a = LDT_entry_a(&ud); - desc->b = LDT_entry_b(&ud); + fill_ldt(desc, &ud); } static inline u32 read_32bit_tls(struct task_struct *t, int tls) diff --git a/arch/x86/kernel/tls.c b/arch/x86/kernel/tls.c index 67a3776..74d2b65 100644 --- a/arch/x86/kernel/tls.c +++ b/arch/x86/kernel/tls.c @@ -67,10 +67,9 @@ int do_set_thread_area(struct task_struct *p, int idx, if (LDT_empty(&info)) { desc[0] = 0; desc[1] = 0; - } else { - desc[0] = LDT_entry_a(&info); - desc[1] = LDT_entry_b(&info); - } + } else + fill_ldt((struct desc_struct *)desc, &info); + if (t == ¤t->thread) load_TLS(t, cpu); diff --git a/include/asm-x86/desc.h b/include/asm-x86/desc.h index 6065c50..47086d2 100644 --- a/include/asm-x86/desc.h +++ b/include/asm-x86/desc.h @@ -1,5 +1,34 @@ +#ifndef _ASM_DESC_H_ +#define _ASM_DESC_H_ + +#ifndef __ASSEMBLY__ +#include <asm/desc_defs.h> +#include <asm/ldt.h> + +static inline void fill_ldt(struct desc_struct *desc, struct user_desc *info) +{ + desc->limit0 = info->limit & 0x0ffff; + desc->base0 = info->base_addr & 0x0000ffff; + + desc->base1 = (info->base_addr & 0x00ff0000) >> 16; + desc->type = (info->read_exec_only ^ 1) << 1; + desc->type |= info->contents << 2; + desc->s = 1; + desc->dpl = 0x3; + desc->p = info->seg_not_present ^ 1; + desc->limit = (info->limit & 0xf0000) >> 16; + desc->avl = info->useable; + desc->d = info->seg_32bit; + desc->g = info->limit_in_pages; + desc->base2 = (info->base_addr & 0xff000000) >> 24; +} + +#endif + #ifdef CONFIG_X86_32 # include "desc_32.h" #else # include "desc_64.h" #endif + +#endif diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h index 54b2314..0370099 100644 --- a/include/asm-x86/desc_32.h +++ b/include/asm-x86/desc_32.h @@ -163,21 +163,6 @@ static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const vo #define set_tss_desc(cpu,addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr) -#define LDT_entry_a(info) \ - ((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff)) - -#define LDT_entry_b(info) \ - (((info)->base_addr & 0xff000000) | \ - (((info)->base_addr & 0x00ff0000) >> 16) | \ - ((info)->limit & 0xf0000) | \ - (((info)->read_exec_only ^ 1) << 9) | \ - ((info)->contents << 10) | \ - (((info)->seg_not_present ^ 1) << 15) | \ - ((info)->seg_32bit << 22) | \ - ((info)->limit_in_pages << 23) | \ - ((info)->useable << 20) | \ - 0x7000) - #define LDT_empty(info) (\ (info)->base_addr == 0 && \ (info)->limit == 0 && \ diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h index c49f928..ba7fb87 100644 --- a/include/asm-x86/desc_64.h +++ b/include/asm-x86/desc_64.h @@ -147,23 +147,6 @@ static inline void set_ldt_desc(unsigned cpu, void *addr, int size) (unsigned long)addr, DESC_LDT, size * 8 - 1); } -#define LDT_entry_a(info) \ - ((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff)) -/* Don't allow setting of the lm bit. It is useless anyways because - 64bit system calls require __USER_CS. */ -#define LDT_entry_b(info) \ - (((info)->base_addr & 0xff000000) | \ - (((info)->base_addr & 0x00ff0000) >> 16) | \ - ((info)->limit & 0xf0000) | \ - (((info)->read_exec_only ^ 1) << 9) | \ - ((info)->contents << 10) | \ - (((info)->seg_not_present ^ 1) << 15) | \ - ((info)->seg_32bit << 22) | \ - ((info)->limit_in_pages << 23) | \ - ((info)->useable << 20) | \ - /* ((info)->lm << 21) | */ \ - 0x7000) - #define LDT_empty(info) (\ (info)->base_addr == 0 && \ (info)->limit == 0 && \ |
