From 76cb841cb886eef6b3bee341a2266c76578724ad Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 03:02:30 +0200 Subject: Adding upstream version 4.19.249. Signed-off-by: Daniel Baumann --- arch/h8300/mm/fault.c | 58 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 58 insertions(+) create mode 100644 arch/h8300/mm/fault.c (limited to 'arch/h8300/mm/fault.c') diff --git a/arch/h8300/mm/fault.c b/arch/h8300/mm/fault.c new file mode 100644 index 000000000..fabffb839 --- /dev/null +++ b/arch/h8300/mm/fault.c @@ -0,0 +1,58 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * linux/arch/h8300/mm/fault.c + * + * Copyright (C) 1998 D. Jeff Dionne , + * Copyright (C) 2000 Lineo, Inc. (www.lineo.com) + * + * Based on: + * + * linux/arch/m68knommu/mm/fault.c + * linux/arch/m68k/mm/fault.c + * + * Copyright (C) 1995 Hamish Macdonald + */ + +#include +#include +#include +#include + +#include + +void die(const char *str, struct pt_regs *fp, unsigned long err); + +/* + * This routine handles page faults. It determines the problem, and + * then passes it off to one of the appropriate routines. + * + * error_code: + * bit 0 == 0 means no page found, 1 means protection fault + * bit 1 == 0 means read, 1 means write + * + * If this routine detects a bad access, it returns 1, otherwise it + * returns 0. + */ +asmlinkage int do_page_fault(struct pt_regs *regs, unsigned long address, + unsigned long error_code) +{ +#ifdef DEBUG + pr_debug("regs->sr=%#x, regs->pc=%#lx, address=%#lx, %ld\n", + regs->sr, regs->pc, address, error_code); +#endif + +/* + * Oops. The kernel tried to access some bad page. We'll have to + * terminate things with extreme prejudice. + */ + if ((unsigned long) address < PAGE_SIZE) + pr_alert("Unable to handle kernel NULL pointer dereference"); + else + pr_alert("Unable to handle kernel access"); + printk(" at virtual address %08lx\n", address); + if (!user_mode(regs)) + die("Oops", regs, error_code); + do_exit(SIGKILL); + + return 1; +} -- cgit v1.2.3