Attachment 157414 Details for Bug 241810 – patch

[patch] patch

linux-2.6-x86-crash-driver.patch (text/plain), 6.40 KB, created by Guy Streeter on 2007-06-19 20:12:00 UTC

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Creator: Guy Streeter

Created: 2007-06-19 20:12:00 UTC

Size: 6.40 KB

patch

obsolete

>diff -urNp --exclude-from=/home/davej/.exclude linux-1050/arch/i386/mm/init.c linux-1060/arch/i386/mm/init.c
>--- linux-1050/arch/i386/mm/init.c
>+++ linux-1060/arch/i386/mm/init.c
>@@ -248,6 +248,8 @@ int devmem_is_allowed(unsigned long page
>    return 0;
> }
> 
>+EXPORT_SYMBOL_GPL(page_is_ram);
>+
> #ifdef CONFIG_HIGHMEM
> pte_t *kmap_pte;
> pgprot_t kmap_prot;
>diff -urNp --exclude-from=/home/davej/.exclude linux-1050/drivers/char/crash.c linux-1060/drivers/char/crash.c
>--- linux-1050/drivers/char/crash.c
>+++ linux-1060/drivers/char/crash.c
>@@ -0,0 +1,128 @@
>+/*
>+ *  linux/drivers/char/crash.c
>+ *
>+ *  Copyright (C) 2004  Dave Anderson <anderson@redhat.com>
>+ *  Copyright (C) 2004  Red Hat, Inc.
>+ */
>+
>+/******************************************************************************
>+ *
>+ *   This program is free software; you can redistribute it and/or modify
>+ *   it under the terms of the GNU General Public License as published by
>+ *   the Free Software Foundation; either version 2, or (at your option)
>+ *   any later version.
>+ *
>+ *   This program is distributed in the hope that it will be useful,
>+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
>+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
>+ *   GNU General Public License for more details.
>+ *
>+ *   You should have received a copy of the GNU General Public License
>+ *   along with this program; if not, write to the Free Software
>+ *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
>+ *
>+ *****************************************************************************/
>+
>+#include <linux/module.h>
>+#include <linux/types.h>
>+#include <linux/miscdevice.h>
>+#include <linux/init.h>
>+#include <asm/io.h>
>+#include <asm/uaccess.h>
>+#include <asm/types.h>
>+#include <asm/crash.h>
>+
>+#define CRASH_VERSION   "1.0"
>+
>+/*
>+ *  These are the file operation functions that allow crash utility
>+ *  access to physical memory.
>+ */
>+
>+static loff_t 
>+crash_llseek(struct file * file, loff_t offset, int orig)
>+{
>+	switch (orig) {
>+	case 0:
>+		file->f_pos = offset;
>+		return file->f_pos;
>+	case 1:
>+		file->f_pos += offset;
>+		return file->f_pos;
>+	default:
>+		return -EINVAL;
>+	}
>+}
>+
>+/*
>+ *  Determine the page address for an address offset value, 
>+ *  get a virtual address for it, and copy it out.
>+ *  Accesses must fit within a page.
>+ */
>+static ssize_t
>+crash_read(struct file *file, char *buf, size_t count, loff_t *poff)
>+{
>+	void *vaddr;
>+	struct page *page;
>+	u64 offset;
>+	ssize_t read;
>+
>+	offset = *poff;
>+	if (offset >> PAGE_SHIFT != (offset+count-1) >> PAGE_SHIFT) 
>+		return -EINVAL;
>+
>+	vaddr = map_virtual(offset, &page);
>+	if (!vaddr)
>+		return -EFAULT;
>+
>+	if (copy_to_user(buf, vaddr, count)) {
>+		unmap_virtual(page);
>+		return -EFAULT;
>+	}
>+	unmap_virtual(page);
>+
>+	read = count;
>+	*poff += read;
>+	return read;
>+}
>+
>+static struct file_operations crash_fops = {
>+	.owner = THIS_MODULE,
>+	.llseek = crash_llseek,
>+	.read = crash_read,
>+};
>+
>+static struct miscdevice crash_dev = {
>+	MISC_DYNAMIC_MINOR,
>+	"crash",
>+	&crash_fops
>+};
>+
>+static int __init
>+crash_init(void)
>+{
>+	int ret;
>+
>+	ret = misc_register(&crash_dev);
>+	if (ret) {
>+		printk(KERN_ERR 
>+		    "crash memory driver: cannot misc_register (MISC_DYNAMIC_MINOR)\n");
>+		goto out;
>+	}
>+	
>+	ret = 0;
>+	printk(KERN_INFO "crash memory driver: version %s\n", CRASH_VERSION);
>+out:
>+	return ret;
>+}
>+
>+static void __exit
>+crash_cleanup_module(void)
>+{
>+	misc_deregister(&crash_dev);
>+}
>+
>+module_init(crash_init);
>+module_exit(crash_cleanup_module);
>+
>+MODULE_LICENSE("GPL");
>diff -urNp --exclude-from=/home/davej/.exclude linux-1050/drivers/char/Kconfig linux-1060/drivers/char/Kconfig
>--- linux-1050/drivers/char/Kconfig
>+++ linux-1060/drivers/char/Kconfig
>@@ -441,6 +441,8 @@ config LEGACY_PTYS
> 	  security.  This option enables these legacy devices; on most
> 	  systems, it is safe to say N.
> 
>+config CRASH
>+        tristate "Crash Utility memory driver"
> 
> config LEGACY_PTY_COUNT
> 	int "Maximum number of legacy PTY in use"
>--- linux-2.6.16.noarch/drivers/char/Makefile~	2006-03-25 18:50:42.000000000 -0500
>+++ linux-2.6.16.noarch/drivers/char/Makefile	2006-03-25 18:50:59.000000000 -0500
>@@ -95,6 +95,7 @@ obj-$(CONFIG_IPMI_HANDLER)	+= ipmi/
> 
> obj-$(CONFIG_HANGCHECK_TIMER)	+= hangcheck-timer.o
> obj-$(CONFIG_TCG_TPM)		+= tpm/
>+obj-$(CONFIG_CRASH)		+= crash.o
> 
> # Files generated that shall be removed upon make clean
> clean-files := consolemap_deftbl.c defkeymap.c qtronixmap.c
>diff -urNp --exclude-from=/home/davej/.exclude linux-1050/include/asm-i386/crash.h linux-1060/include/asm-i386/crash.h
>--- linux-1050/include/asm-i386/crash.h
>+++ linux-1060/include/asm-i386/crash.h
>@@ -0,0 +1,75 @@
>+#ifndef _ASM_I386_CRASH_H
>+#define _ASM_I386_CRASH_H
>+
>+/*
>+ * linux/include/asm-i386/crash.h
>+ *
>+ * Copyright (c) 2004 Red Hat, Inc. All rights reserved.
>+ *
>+ * This program is free software; you can redistribute it and/or modify
>+ * it under the terms of the GNU General Public License as published by
>+ * the Free Software Foundation; either version 2, or (at your option)
>+ * any later version.
>+ *
>+ * This program is distributed in the hope that it will be useful,
>+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
>+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
>+ * GNU General Public License for more details.
>+ *
>+ * You should have received a copy of the GNU General Public License
>+ * along with this program; if not, write to the Free Software
>+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
>+ *
>+ */
>+
>+#ifdef __KERNEL__
>+
>+#include <linux/mm.h>
>+#include <linux/highmem.h>
>+#include <asm/mmzone.h>
>+
>+extern int page_is_ram(unsigned long);
>+
>+static inline void *
>+map_virtual(u64 offset, struct page **pp)
>+{
>+	struct page *page;
>+	unsigned long pfn;
>+	void *vaddr;
>+
>+	pfn = (unsigned long)(offset >> PAGE_SHIFT);
>+
>+	if (!page_is_ram(pfn)) {
>+		printk(KERN_INFO
>+		    "crash memory driver: !page_is_ram(pfn: %lx)\n", pfn);
>+		return NULL;
>+	}
>+
>+	if (!pfn_valid(pfn)) {
>+		printk(KERN_INFO
>+		    "crash memory driver: invalid pfn: %lx )\n", pfn);
>+		return NULL;
>+	}
>+
>+	page = pfn_to_page(pfn);
>+
>+	vaddr = kmap(page);
>+	if (!vaddr) {
>+		printk(KERN_INFO
>+		    "crash memory driver: pfn: %lx kmap(page: %lx) failed\n", 
>+			pfn, (unsigned long)page);
>+		return NULL;
>+	}
>+
>+	*pp = page;
>+	return (vaddr + (offset & (PAGE_SIZE-1)));
>+}
>+
>+static inline void unmap_virtual(struct page *page) 
>+{ 
>+	kunmap(page);
>+}
>+
>+#endif /* __KERNEL__ */
>+
>+#endif /* _ASM_I386_CRASH_H */

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Attachments on bug 241810: 157414