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| author | Akinobu Mita <akinobu.mita@gmail.com> | 2009-07-19 00:08:54 +0900 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-07-19 18:27:51 +0200 |
| commit | 254e0a6bff87ab8b22293c4bd1443507df698407 (patch) | |
| tree | ca62e3ed83f736c0d53fd9ba7dac3dcbb9cb00a4 /arch/x86/kernel/step.c | |
| parent | 78af08d90b8f745044b1274430bc4bc6b2b27aca (diff) | |
| download | blackbird-op-linux-254e0a6bff87ab8b22293c4bd1443507df698407.tar.gz blackbird-op-linux-254e0a6bff87ab8b22293c4bd1443507df698407.zip | |
x86: Use get_desc_base()
Use get_desc_base() to get the base address in desc_struct
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
LKML-Reference: <20090718150853.GA11294@localhost.localdomain>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/step.c')
| -rw-r--r-- | arch/x86/kernel/step.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/arch/x86/kernel/step.c b/arch/x86/kernel/step.c index e8b9863ef8c4..3149032ff107 100644 --- a/arch/x86/kernel/step.c +++ b/arch/x86/kernel/step.c @@ -4,6 +4,7 @@ #include <linux/sched.h> #include <linux/mm.h> #include <linux/ptrace.h> +#include <asm/desc.h> unsigned long convert_ip_to_linear(struct task_struct *child, struct pt_regs *regs) { @@ -23,7 +24,7 @@ unsigned long convert_ip_to_linear(struct task_struct *child, struct pt_regs *re * and APM bios ones we just ignore here. */ if ((seg & SEGMENT_TI_MASK) == SEGMENT_LDT) { - u32 *desc; + struct desc_struct *desc; unsigned long base; seg &= ~7UL; @@ -33,12 +34,10 @@ unsigned long convert_ip_to_linear(struct task_struct *child, struct pt_regs *re addr = -1L; /* bogus selector, access would fault */ else { desc = child->mm->context.ldt + seg; - base = ((desc[0] >> 16) | - ((desc[1] & 0xff) << 16) | - (desc[1] & 0xff000000)); + base = get_desc_base(desc); /* 16-bit code segment? */ - if (!((desc[1] >> 22) & 1)) + if (!desc->d) addr &= 0xffff; addr += base; } |
