mirror of
https://github.com/gatieme/LDD-LinuxDeviceDrivers.git
synced 2026-08-19 01:22:36 +08:00
arm64 memory layout
This commit is contained in:
Cheng Jian
+75
@@ -0,0 +1,75 @@
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From 071929dbdd865f779a89ba3f1e06ba8d17dd3743 Mon Sep 17 00:00:00 2001
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From: Laura Abbott <labbott@redhat.com>
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Date: Tue, 19 Dec 2017 11:28:10 -0800
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Subject: [PATCH] arm64: Stop printing the virtual memory layout
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Printing kernel addresses should be done in limited circumstances, mostly
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for debugging purposes. Printing out the virtual memory layout at every
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kernel bootup doesn't really fall into this category so delete the prints.
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There are other ways to get the same information.
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Acked-by: Kees Cook <keescook@chromium.org>
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Signed-off-by: Laura Abbott <labbott@redhat.com>
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Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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Signed-off-by: Cheng Jian <gatieme@163.com>
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---
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arch/arm64/mm/init.c | 43 -------------------------------------------
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1 file changed, 43 deletions(-)
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diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
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index 5960bef0170d..672094ed7e07 100644
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--- a/arch/arm64/mm/init.c
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+++ b/arch/arm64/mm/init.c
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@@ -599,49 +599,6 @@ void __init mem_init(void)
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mem_init_print_info(NULL);
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-#define MLK(b, t) b, t, ((t) - (b)) >> 10
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-#define MLM(b, t) b, t, ((t) - (b)) >> 20
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-#define MLG(b, t) b, t, ((t) - (b)) >> 30
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-#define MLK_ROUNDUP(b, t) b, t, DIV_ROUND_UP(((t) - (b)), SZ_1K)
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-
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- pr_notice("Virtual kernel memory layout:\n");
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-#ifdef CONFIG_KASAN
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- pr_notice(" kasan : 0x%16lx - 0x%16lx (%6ld GB)\n",
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- MLG(KASAN_SHADOW_START, KASAN_SHADOW_END));
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-#endif
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- pr_notice(" modules : 0x%16lx - 0x%16lx (%6ld MB)\n",
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- MLM(MODULES_VADDR, MODULES_END));
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- pr_notice(" vmalloc : 0x%16lx - 0x%16lx (%6ld GB)\n",
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- MLG(VMALLOC_START, VMALLOC_END));
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- pr_notice(" .text : 0x%p" " - 0x%p" " (%6ld KB)\n",
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- MLK_ROUNDUP(_text, _etext));
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- pr_notice(" .rodata : 0x%p" " - 0x%p" " (%6ld KB)\n",
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- MLK_ROUNDUP(__start_rodata, __init_begin));
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- pr_notice(" .init : 0x%p" " - 0x%p" " (%6ld KB)\n",
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- MLK_ROUNDUP(__init_begin, __init_end));
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- pr_notice(" .data : 0x%p" " - 0x%p" " (%6ld KB)\n",
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- MLK_ROUNDUP(_sdata, _edata));
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- pr_notice(" .bss : 0x%p" " - 0x%p" " (%6ld KB)\n",
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- MLK_ROUNDUP(__bss_start, __bss_stop));
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- pr_notice(" fixed : 0x%16lx - 0x%16lx (%6ld KB)\n",
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- MLK(FIXADDR_START, FIXADDR_TOP));
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- pr_notice(" PCI I/O : 0x%16lx - 0x%16lx (%6ld MB)\n",
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- MLM(PCI_IO_START, PCI_IO_END));
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-#ifdef CONFIG_SPARSEMEM_VMEMMAP
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- pr_notice(" vmemmap : 0x%16lx - 0x%16lx (%6ld GB maximum)\n",
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- MLG(VMEMMAP_START, VMEMMAP_START + VMEMMAP_SIZE));
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- pr_notice(" 0x%16lx - 0x%16lx (%6ld MB actual)\n",
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- MLM((unsigned long)phys_to_page(memblock_start_of_DRAM()),
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- (unsigned long)virt_to_page(high_memory)));
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-#endif
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- pr_notice(" memory : 0x%16lx - 0x%16lx (%6ld MB)\n",
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- MLM(__phys_to_virt(memblock_start_of_DRAM()),
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- (unsigned long)high_memory));
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-
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-#undef MLK
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-#undef MLM
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-#undef MLK_ROUNDUP
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-
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/*
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* Check boundaries twice: Some fundamental inconsistencies can be
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* detected at build time already.
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--
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2.17.1
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@@ -0,0 +1,14 @@
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obj-m := layout.o
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KERNELDIR ?= /lib/modules/$(shell uname -r)/build
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PWD := $(shell pwd)
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all:
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make -C $(KERNELDIR) M=$(PWD) modules
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clean:
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make -C $(KERNELDIR) M=$(PWD) clean
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@@ -0,0 +1,99 @@
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/*****************************************************************
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文件名：mem.c
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输入参数：
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pid 接收待查询进程的PID
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va 接收待查询的虚拟地址
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*****************************************************************/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/sched.h>
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#include <linux/mm.h>
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#include <asm/pgtable.h>
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#include <asm/page.h>
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#include <linux/printk.h>
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#include <linux/memblock.h>
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#include <linux/kallsyms.h>
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MODULE_LICENSE("GPL");
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typedef unsigned long (*PFUNC)(void);
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#if 0
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unsigned long SYMS_FUN(char *name)
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{
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PFUNC func = (PFUNC)kallsyms_lookup_name(name);
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//printk("0x%16lx\n", (unsigned long)func);
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return (*func)();
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}
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#endif
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void show_layout(void)
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{
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#define SYMS_VAL(name) ((unsigned long)kallsyms_lookup_name(name))
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#define SYMS_FUN(name) ((*((PFUNC)kallsyms_lookup_name(name)))())
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#define MLK(b, t) b, t, ((t) - (b)) >> 10
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#define MLM(b, t) b, t, ((t) - (b)) >> 20
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#define MLG(b, t) b, t, ((t) - (b)) >> 30
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#define MLK_ROUNDUP(b, t) b, t, DIV_ROUND_UP(((t) - (b)), SZ_1K)
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pr_notice("Virtual kernel memory layout:\n");
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pr_notice(" memory : 0x%16lx - 0x%16lx (%6ld MB)\n",
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MLM((unsigned long)phys_to_virt(SYMS_FUN("memblock_start_of_DRAM")),
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(unsigned long)high_memory));
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#ifdef CONFIG_KASAN
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pr_notice(" kasan : 0x%16lx - 0x%16lx (%6ld GB)\n",
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MLG(KASAN_SHADOW_START, KASAN_SHADOW_END));
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#endif
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pr_notice(" modules : 0x%16lx - 0x%16lx (%6ld MB)\n",
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MLM(MODULES_VADDR, MODULES_END));
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pr_notice(" vmalloc : 0x%16lx - 0x%16lx (%6ld GB)\n",
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MLG(VMALLOC_START, VMALLOC_END));
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pr_notice(" kernel : 0x%16lx - 0x%16lx (%6ld KB)\n",
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MLK(SYMS_VAL("_text"), SYMS_VAL("_end")));
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pr_notice(" .text : 0x%16lx - 0x%16lx (%6ld KB)\n",
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MLK_ROUNDUP(SYMS_VAL("_text"), SYMS_VAL("_etext")));
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pr_notice(" .rodata : 0x%16lx - 0x%16lx (%6ld KB)\n",
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MLK_ROUNDUP(SYMS_VAL("__start_rodata"), SYMS_VAL("__init_begin")));
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pr_notice(" .init : 0x%16lx - 0x%16lx (%6ld KB)\n",
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MLK_ROUNDUP(SYMS_VAL("__init_begin"), SYMS_VAL("__init_end")));
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pr_notice(" .data : 0x%16lx - 0x%16lx (%6ld KB)\n",
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MLK_ROUNDUP(SYMS_VAL("_sdata"), SYMS_VAL("_edata")));
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pr_notice(" .bss : 0x%16lx - 0x%16lx (%6ld KB)\n",
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MLK_ROUNDUP(SYMS_VAL("__bss_start"), SYMS_VAL("__bss_stop")));
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pr_notice(" fixed : 0x%16lx - 0x%16lx (%6ld KB)\n",
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MLK(FIXADDR_START, FIXADDR_TOP));
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pr_notice(" PCI I/O : 0x%16lx - 0x%16lx (%6ld MB)\n",
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MLM(PCI_IO_START, PCI_IO_END));
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#ifdef CONFIG_SPARSEMEM_VMEMMAP
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pr_notice(" vmemmap : 0x%16lx - 0x%16lx (%6ld GB maximum)\n",
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MLG(VMEMMAP_START, VMEMMAP_START + VMEMMAP_SIZE));
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pr_notice(" 0x%16lx - 0x%16lx (%6ld MB actual)\n",
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MLM((unsigned long)phys_to_page(SYMS_FUN("memblock_start_of_DRAM")),
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(unsigned long)virt_to_page(high_memory)));
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#endif
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pr_notice("PAGE_OFFSET : 0x%16lx\n", PAGE_OFFSET);
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pr_notice("KIMAGE_VADDR: 0x%16lx\n", KIMAGE_VADDR);
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#undef MLK
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#undef MLM
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#undef MLK_ROUNDUP
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}
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static int __init show_layout_init(void)
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{
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show_layout();
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return 0;
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}
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static void __exit show_layout_exit(void)
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{
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printk(KERN_INFO"Goodbye!\n");
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}
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module_init(show_layout_init);
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module_exit(show_layout_exit);
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