diff options
Diffstat (limited to 'arch/x86/include/asm/desc.h')
| -rw-r--r-- | arch/x86/include/asm/desc.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/arch/x86/include/asm/desc.h b/arch/x86/include/asm/desc.h index 617bd56b307..526248dd31e 100644 --- a/arch/x86/include/asm/desc.h +++ b/arch/x86/include/asm/desc.h @@ -5,6 +5,7 @@ #include <asm/ldt.h> #include <asm/mmu.h> #include <linux/smp.h> +#include <linux/mm_types.h> static inline void fill_ldt(struct desc_struct *desc, const struct user_desc *info) @@ -93,6 +94,9 @@ static inline int desc_empty(const void *ptr) #define load_TLS(t, cpu) native_load_tls(t, cpu) #define set_ldt native_set_ldt +#ifdef CONFIG_X86_32 +#define load_user_cs_desc native_load_user_cs_desc +#endif /*CONFIG_X86_32*/ #define write_ldt_entry(dt, entry, desc) \ native_write_ldt_entry(dt, entry, desc) @@ -392,4 +396,25 @@ static inline void set_system_intr_gate_ist(int n, void *addr, unsigned ist) _set_gate(n, GATE_INTERRUPT, addr, 0x3, ist, __KERNEL_CS); } +#ifdef CONFIG_X86_32 +static inline void set_user_cs(struct desc_struct *desc, unsigned long limit) +{ + limit = (limit - 1) / PAGE_SIZE; + desc->a = limit & 0xffff; + desc->b = (limit & 0xf0000) | 0x00c0fb00; +} + +static inline void native_load_user_cs_desc(int cpu, struct mm_struct *mm) +{ + get_cpu_gdt_table(cpu)[GDT_ENTRY_DEFAULT_USER_CS] = (mm)->context.user_cs; +} + +#define arch_add_exec_range arch_add_exec_range +#define arch_remove_exec_range arch_remove_exec_range +#define arch_flush_exec_range arch_flush_exec_range +extern void arch_add_exec_range(struct mm_struct *mm, unsigned long limit); +extern void arch_remove_exec_range(struct mm_struct *mm, unsigned long limit); +extern void arch_flush_exec_range(struct mm_struct *mm); +#endif /* CONFIG_X86_32 */ + #endif /* _ASM_X86_DESC_H */ |