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| author | Glauber de Oliveira Costa <gcosta@redhat.com> | 2008-01-30 13:31:13 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-01-30 13:31:13 +0100 |
| commit | 80fbb69a8d1268ef48dfe21da80e68cb01922f31 (patch) | |
| tree | 6cc2d5d0fdc40eb53f74e36c5557fa24f89edce0 /include/asm-x86/desc.h | |
| parent | 5af725026fe902bf81f1b90b1b9d9ee4b9e1eb6a (diff) | |
| download | kernel-crypto-80fbb69a8d1268ef48dfe21da80e68cb01922f31.tar.gz kernel-crypto-80fbb69a8d1268ef48dfe21da80e68cb01922f31.tar.xz kernel-crypto-80fbb69a8d1268ef48dfe21da80e68cb01922f31.zip | |
x86: introduce fill_ldt
This patch introduces fill_ldt(), which populates a ldt descriptor
from a user_desc in once, instead of relying in the LDT_entry_a and
LDT_entry_b macros
Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/asm-x86/desc.h')
| -rw-r--r-- | include/asm-x86/desc.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/include/asm-x86/desc.h b/include/asm-x86/desc.h index 6065c509226..47086d2d929 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 |