1 files changed, 0 insertions, 159 deletions
diff --git a/ANDROID_3.4.5/arch/arm/mm/rodata.c b/ANDROID_3.4.5/arch/arm/mm/rodata.c
deleted file mode 100644
index 9a8eb841..00000000
--- a/ANDROID_3.4.5/arch/arm/mm/rodata.c
+++ /dev/null
@@ -1,159 +0,0 @@
-/*
- *  linux/arch/arm/mm/rodata.c
- *
- *  Copyright (C) 2011 Google, Inc.
- *
- *  Author: Colin Cross <ccross@android.com>
- *
- *  Based on x86 implementation in arch/x86/mm/init_32.c
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/module.h>
-
-#include <asm/cache.h>
-#include <asm/pgtable.h>
-#include <asm/rodata.h>
-#include <asm/sections.h>
-#include <asm/tlbflush.h>
-
-#include "mm.h"
-
-static int kernel_set_to_readonly __read_mostly;
-
-#ifdef CONFIG_DEBUG_RODATA_TEST
-static const int rodata_test_data = 0xC3;
-
-static noinline void rodata_test(void)
-{
-	int result;
-
-	pr_info("%s: attempting to write to read-only section:\n", __func__);
-
-	if (*(volatile int *)&rodata_test_data != 0xC3) {
-		pr_err("read only data changed before test\n");
-		return;
-	}
-
-	/*
-	 * Attempt to to write to rodata_test_data, trapping the expected
-	 * data abort.  If the trap executed, result will be 1.  If it didn't,
-	 * result will be 0xFF.
-	 */
-	asm volatile(
-		"0:	str	%[zero], [%[rodata_test_data]]\n"
-		"	mov	%[result], #0xFF\n"
-		"	b	2f\n"
-		"1:	mov	%[result], #1\n"
-		"2:\n"
-
-		/* Exception fixup - if store at label 0 faults, jumps to 1 */
-		".pushsection __ex_table, \"a\"\n"
-		"	.long	0b, 1b\n"
-		".popsection\n"
-
-		: [result] "=r" (result)
-		: [rodata_test_data] "r" (&rodata_test_data), [zero] "r" (0)
-		: "memory"
-	);
-
-	if (result == 1)
-		pr_info("write to read-only section trapped, success\n");
-	else
-		pr_err("write to read-only section NOT trapped, test failed\n");
-
-	if (*(volatile int *)&rodata_test_data != 0xC3)
-		pr_err("read only data changed during write\n");
-}
-#else
-static inline void rodata_test(void) { }
-#endif
-
-static int set_page_attributes(unsigned long virt, int numpages,
-	pte_t (*f)(pte_t))
-{
-	pmd_t *pmd;
-	pte_t *pte;
-	unsigned long start = virt;
-	unsigned long end = virt + (numpages << PAGE_SHIFT);
-	unsigned long pmd_end;
-
-	while (virt < end) {
-		pmd = pmd_off_k(virt);
-		pmd_end = min(ALIGN(virt + 1, PMD_SIZE), end);
-
-		if ((pmd_val(*pmd) & PMD_TYPE_MASK) != PMD_TYPE_TABLE) {
-			pr_err("%s: pmd %p=%08lx for %08lx not page table\n",
-				__func__, pmd, pmd_val(*pmd), virt);
-			virt = pmd_end;
-			continue;
-		}
-
-		while (virt < pmd_end) {
-			pte = pte_offset_kernel(pmd, virt);
-			set_pte_ext(pte, f(*pte), 0);
-			virt += PAGE_SIZE;
-		}
-	}
-
-	flush_tlb_kernel_range(start, end);
-
-	return 0;
-}
-
-int set_memory_ro(unsigned long virt, int numpages)
-{
-	return set_page_attributes(virt, numpages, pte_wrprotect);
-}
-EXPORT_SYMBOL(set_memory_ro);
-
-int set_memory_rw(unsigned long virt, int numpages)
-{
-	return set_page_attributes(virt, numpages, pte_mkwrite);
-}
-EXPORT_SYMBOL(set_memory_rw);
-
-void set_kernel_text_rw(void)
-{
-	unsigned long start = PAGE_ALIGN((unsigned long)_text);
-	unsigned long size = PAGE_ALIGN((unsigned long)__end_rodata) - start;
-
-	if (!kernel_set_to_readonly)
-		return;
-
-	pr_debug("Set kernel text: %lx - %lx to read-write\n",
-		 start, start + size);
-
-	set_memory_rw(start, size >> PAGE_SHIFT);
-}
-
-void set_kernel_text_ro(void)
-{
-	unsigned long start = PAGE_ALIGN((unsigned long)_text);
-	unsigned long size = PAGE_ALIGN((unsigned long)__end_rodata) - start;
-
-	if (!kernel_set_to_readonly)
-		return;
-
-	pr_info_once("Write protecting the kernel text section %lx - %lx\n",
-		start, start + size);
-
-	pr_debug("Set kernel text: %lx - %lx to read only\n",
-		 start, start + size);
-
-	set_memory_ro(start, size >> PAGE_SHIFT);
-}
-
-void mark_rodata_ro(void)
-{
-	kernel_set_to_readonly = 1;
-
-	set_kernel_text_ro();
-
-	rodata_test();
-}