waterInvestigationHiddenDanger hiddenDangerAnalysis.h 李欣儒 commit at 2021-03-04

waterInvestigationHiddenDanger/analysisOfLeakageHiddenDanger/hiddenDangerAnalysis.h

@@ -96,3 +96,73 @@ extern unsigned long empty_zero_page;
  * Page Directory:
  *  - Size: 16KB
  *  - 64 PGEs per PGD
+ *  - Each PGE holds 1 PUD and covers 64MB
+ *
+ * Page Upper Directory:
+ *  - Size: 256B
+ *  - 1 PUE per PUD
+ *  - Each PUE holds 1 PMD and covers 64MB
+ *
+ * Page Mid-Level Directory
+ *  - Size: 256B
+ *  - 1 PME per PMD
+ *  - Each PME holds 64 STEs, all of which point to separate chunks of the same Page Table
+ *  - All STEs are instantiated at the same time
+ *
+ * Page Table
+ *  - Size: 16KB
+ *  - 4096 PTEs per PT
+ *  - Each Linux PT is subdivided into 64 FR451 PT's, each of which holds 64 entries
+ *
+ * Pages
+ *  - Size: 4KB
+ *
+ * total PTEs
+ *	= 1 PML4E * 64 PGEs * 1 PUEs * 1 PMEs * 4096 PTEs
+ *	= 1 PML4E * 64 PGEs * 64 STEs * 64 PTEs/FR451-PT
+ *	= 262144 (or 256 * 1024)
+ */
+#define PGDIR_SHIFT		26
+#define PGDIR_SIZE		(1UL << PGDIR_SHIFT)
+#define PGDIR_MASK		(~(PGDIR_SIZE - 1))
+#define PTRS_PER_PGD		64
+
+#define PUD_SHIFT		26
+#define PTRS_PER_PUD		1
+#define PUD_SIZE		(1UL << PUD_SHIFT)
+#define PUD_MASK		(~(PUD_SIZE - 1))
+#define PUE_SIZE		256
+
+#define PMD_SHIFT		26
+#define PMD_SIZE		(1UL << PMD_SHIFT)
+#define PMD_MASK		(~(PMD_SIZE - 1))
+#define PTRS_PER_PMD		1
+#define PME_SIZE		256
+
+#define __frv_PT_SIZE		256
+
+#define PTRS_PER_PTE		4096
+
+#define USER_PGDS_IN_LAST_PML4	(TASK_SIZE / PGDIR_SIZE)
+#define FIRST_USER_ADDRESS	0
+
+#define USER_PGD_PTRS		(PAGE_OFFSET >> PGDIR_SHIFT)
+#define KERNEL_PGD_PTRS		(PTRS_PER_PGD - USER_PGD_PTRS)
+
+#define TWOLEVEL_PGDIR_SHIFT	26
+#define BOOT_USER_PGD_PTRS	(__PAGE_OFFSET >> TWOLEVEL_PGDIR_SHIFT)
+#define BOOT_KERNEL_PGD_PTRS	(PTRS_PER_PGD - BOOT_USER_PGD_PTRS)
+
+#ifndef __ASSEMBLY__
+
+extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
+
+#define pte_ERROR(e) \
+	printk("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, (e).pte)
+#define pmd_ERROR(e) \
+	printk("%s:%d: bad pmd %08lx.\n", __FILE__, __LINE__, pmd_val(e))
+#define pud_ERROR(e) \
+	printk("%s:%d: bad pud %08lx.\n", __FILE__, __LINE__, pmd_val(pud_val(e)))
+#define pgd_ERROR(e) \
+	printk("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pmd_val(pud_val(pgd_val(e))))
+