Messages in this thread | | | Date | Fri, 03 Jan 2003 16:33:28 +0000 | From | Alvaro Lopes <> | Subject | Re: [STUPID] Best looking code to transfer to a t-shirt |
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Maciej Soltysiak wrote:
>Hi, > >I am in a t-shirt transfering frenzy and was wondering which part of the >kernel code it would be best to have on my t-shirt. >I was looking at my favourite: netfilter code, but it is to clean, short >and simple functions, no tons of pointers, no mallocs, no hex numbers, too >many defines used. I was looking for something terribly complicated and >looking awesome to the eye. > > arch/i386/mm/fault.c
/* * Synchronize this task's top level page-table * with the 'reference' page table. * * Do _not_ use "tsk" here. We might be inside * an interrupt in the middle of a task switch.. */ int offset = __pgd_offset(address); pgd_t *pgd, *pgd_k; pmd_t *pmd, *pmd_k; pte_t *pte_k;
asm("movl %%cr3,%0":"=r" (pgd)); pgd = offset + (pgd_t *)__va(pgd); pgd_k = init_mm.pgd + offset;
if (!pgd_present(*pgd_k)) goto no_context; set_pgd(pgd, *pgd_k); pmd = pmd_offset(pgd, address); pmd_k = pmd_offset(pgd_k, address); if (!pmd_present(*pmd_k)) goto no_context; set_pmd(pmd, *pmd_k);
pte_k = pte_offset_kernel(pmd_k, address); if (!pte_present(*pte_k)) goto no_context; return; }
--
Álvaro Lopes --------------------- A .sig is just a .sig
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