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| author | Glauber de Oliveira Costa <gcosta@redhat.com> | 2008-01-30 13:31:14 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-01-30 13:31:14 +0100 |
| commit | cc6978528cbd475d952e0eb5073375839dfb600e (patch) | |
| tree | 96d07f0b08b08c0ebfaf8c73252316cb8c978652 | |
| parent | 26048d75e8d6c840742468667f4a7ab8c2df74c9 (diff) | |
| download | linux-stable-cc6978528cbd475d952e0eb5073375839dfb600e.tar.gz linux-stable-cc6978528cbd475d952e0eb5073375839dfb600e.tar.bz2 linux-stable-cc6978528cbd475d952e0eb5073375839dfb600e.zip | |
x86: modify get_desc_base
This patch makes get_desc_base() receive a struct desc_struct,
and then uses its internal fields to compute the base address.
This is done at both i386 and x86_64, and then it is moved
to common header
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>
| -rw-r--r-- | arch/x86/kernel/tls.c | 2 | ||||
| -rw-r--r-- | arch/x86/mm/fault_32.c | 2 | ||||
| -rw-r--r-- | include/asm-x86/desc.h | 5 | ||||
| -rw-r--r-- | include/asm-x86/desc_32.h | 8 | ||||
| -rw-r--r-- | include/asm-x86/desc_64.h | 9 |
5 files changed, 7 insertions, 19 deletions
diff --git a/arch/x86/kernel/tls.c b/arch/x86/kernel/tls.c index 74d2b65a82eb..98f428be8e8c 100644 --- a/arch/x86/kernel/tls.c +++ b/arch/x86/kernel/tls.c @@ -112,7 +112,7 @@ int do_get_thread_area(struct task_struct *p, int idx, memset(&info, 0, sizeof(struct user_desc)); info.entry_number = idx; - info.base_addr = get_desc_base((void *)desc); + info.base_addr = get_desc_base((struct desc_struct *)desc); info.limit = GET_LIMIT(desc); info.seg_32bit = GET_32BIT(desc); info.contents = GET_CONTENTS(desc); diff --git a/arch/x86/mm/fault_32.c b/arch/x86/mm/fault_32.c index 6056c6d71835..ef5ab2b925c4 100644 --- a/arch/x86/mm/fault_32.c +++ b/arch/x86/mm/fault_32.c @@ -115,7 +115,7 @@ static inline unsigned long get_segment_eip(struct pt_regs *regs, } /* Decode the code segment base from the descriptor */ - base = get_desc_base((unsigned long *)desc); + base = get_desc_base((struct desc_struct *)desc); if (seg & (1<<2)) { mutex_unlock(¤t->mm->context.lock); diff --git a/include/asm-x86/desc.h b/include/asm-x86/desc.h index 99c4adc851e2..a6fdd7c7b6b2 100644 --- a/include/asm-x86/desc.h +++ b/include/asm-x86/desc.h @@ -69,6 +69,11 @@ static inline void load_LDT(mm_context_t *pc) preempt_enable(); } +static inline unsigned long get_desc_base(struct desc_struct *desc) +{ + return desc->base0 | ((desc->base1) << 16) | ((desc->base2) << 24); +} + #else /* * GET_DESC_BASE reads the descriptor base of the specified segment. diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h index 01415ad35fdf..8450c2a99c3a 100644 --- a/include/asm-x86/desc_32.h +++ b/include/asm-x86/desc_32.h @@ -168,14 +168,6 @@ 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) -static inline unsigned long get_desc_base(unsigned long *desc) -{ - unsigned long base; - base = ((desc[0] >> 16) & 0x0000ffff) | - ((desc[1] << 16) & 0x00ff0000) | - (desc[1] & 0xff000000); - return base; -} #endif /* !__ASSEMBLY__ */ #endif diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h index 448f96ed973f..a7a6c301c6bc 100644 --- a/include/asm-x86/desc_64.h +++ b/include/asm-x86/desc_64.h @@ -156,15 +156,6 @@ static inline void load_TLS(struct thread_struct *t, unsigned int cpu) gdt[i] = t->tls_array[i]; } -static inline unsigned long get_desc_base(const void *ptr) -{ - const u32 *desc = ptr; - unsigned long base; - base = ((desc[0] >> 16) & 0x0000ffff) | - ((desc[1] << 16) & 0x00ff0000) | - (desc[1] & 0xff000000); - return base; -} #endif /* !__ASSEMBLY__ */ #endif |