Messages in this thread Patch in this message | | | Subject | [PATCH] UML - add generic BUG support | Date | Tue, 03 Oct 2006 18:56:46 -0400 | From | Jeff Dike <> |
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The BUG changes in -mm3 need some arch support. This patch adds the UML support needed. For the most part, it was stolen from the underlying architecture. The exception is the kernel eip < PAGE_OFFSET test, which is wrong for skas mode UMLs.
Signed-off-by: Jeff Dike <jdike@addtoit.com> --- arch/um/Kconfig | 5 +++++ arch/um/sys-i386/Makefile | 2 +- arch/um/sys-i386/bug.c | 20 ++++++++++++++++++++ arch/um/sys-x86_64/Makefile | 2 +- arch/um/sys-x86_64/bug.c | 20 ++++++++++++++++++++ include/asm-um/bug.h | 4 +++- 6 files changed, 50 insertions(+), 3 deletions(-)
Index: linux-2.6.18-mm/arch/um/Kconfig =================================================================== --- linux-2.6.18-mm.orig/arch/um/Kconfig 2006-10-03 12:46:44.000000000 -0400 +++ linux-2.6.18-mm/arch/um/Kconfig 2006-10-03 17:44:32.000000000 -0400 @@ -29,6 +29,11 @@ config GENERIC_CALIBRATE_DELAY bool default y +config GENERIC_BUG + bool + default y + depends on BUG + # Used in kernel/irq/manage.c and include/linux/irq.h config IRQ_RELEASE_METHOD bool Index: linux-2.6.18-mm/include/asm-um/bug.h =================================================================== --- linux-2.6.18-mm.orig/include/asm-um/bug.h 2006-06-17 21:49:35.000000000 -0400 +++ linux-2.6.18-mm/include/asm-um/bug.h 2006-10-03 13:29:28.000000000 -0400 @@ -1,4 +1,6 @@ #ifndef __UM_BUG_H #define __UM_BUG_H -#include <asm-generic/bug.h> + +#include <asm/arch/bug.h> + #endif Index: linux-2.6.18-mm/arch/um/sys-i386/Makefile =================================================================== --- linux-2.6.18-mm.orig/arch/um/sys-i386/Makefile 2006-10-03 12:53:13.000000000 -0400 +++ linux-2.6.18-mm/arch/um/sys-i386/Makefile 2006-10-03 17:44:32.000000000 -0400 @@ -1,4 +1,4 @@ -obj-y = bugs.o checksum.o delay.o fault.o ksyms.o ldt.o ptrace.o \ +obj-y = bug.o bugs.o checksum.o delay.o fault.o ksyms.o ldt.o ptrace.o \ ptrace_user.o setjmp.o signal.o sigcontext.o syscalls.o sysrq.o \ sys_call_table.o tls.o Index: linux-2.6.18-mm/arch/um/sys-i386/bug.c =================================================================== --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ linux-2.6.18-mm/arch/um/sys-i386/bug.c 2006-10-03 13:45:39.000000000 -0400 @@ -0,0 +1,20 @@ +/* + * Copyright (C) 2006 Jeff Dike (jdike@addtoit.com) + * Licensed under the GPL V2 + */ + +#include <linux/uaccess.h> + +/* Mostly copied from i386/x86_86 - eliminated the eip < PAGE_OFFSET because + * that's not relevent in skas mode. + */ + +int is_valid_bugaddr(unsigned long eip) +{ + unsigned short ud2; + + if (probe_kernel_address((unsigned short __user *)eip, ud2)) + return 0; + + return ud2 == 0x0b0f; +} Index: linux-2.6.18-mm/arch/um/sys-x86_64/Makefile =================================================================== --- linux-2.6.18-mm.orig/arch/um/sys-x86_64/Makefile 2006-10-03 12:53:13.000000000 -0400 +++ linux-2.6.18-mm/arch/um/sys-x86_64/Makefile 2006-10-03 17:44:32.000000000 -0400 @@ -4,7 +4,7 @@ # Licensed under the GPL # -obj-y = bugs.o delay.o fault.o ldt.o mem.o ptrace.o ptrace_user.o \ +obj-y = bug.o bugs.o delay.o fault.o ldt.o mem.o ptrace.o ptrace_user.o \ setjmp.o sigcontext.o signal.o syscalls.o syscall_table.o sysrq.o \ ksyms.o tls.o Index: linux-2.6.18-mm/arch/um/sys-x86_64/bug.c =================================================================== --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ linux-2.6.18-mm/arch/um/sys-x86_64/bug.c 2006-10-03 13:45:53.000000000 -0400 @@ -0,0 +1,20 @@ +/* + * Copyright (C) 2006 Jeff Dike (jdike@addtoit.com) + * Licensed under the GPL V2 + */ + +#include <linux/uaccess.h> + +/* Mostly copied from i386/x86_86 - eliminated the eip < PAGE_OFFSET because + * that's not relevent in skas mode. + */ + +int is_valid_bugaddr(unsigned long eip) +{ + unsigned short ud2; + + if (probe_kernel_address((unsigned short __user *)eip, ud2)) + return 0; + + return ud2 == 0x0b0f; +} - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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