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Message-ID: <20061004184927.GH665@shell0.pdx.osdl.net>
Date: Wed, 4 Oct 2006 11:49:27 -0700
From: Judith Lebzelter <judith@...l.org>
To: paulus@...ba.org
Cc: jeremy@...p.org, linuxppc-dev@...abs.org,
linux-kernel@...r.kernel.org
Subject: [PATCH] use-generic-bug-for-ppc
For 2.6.18-mm3, the 32-bit 'ppc' architectures won't compile due to errors:
arch/ppc/kernel/built-in.o: In function `find_bug':
arch/ppc/kernel/traps.c:582: undefined reference to `module_find_bug'
arch/powerpc/kernel/built-in.o: In function `module_arch_cleanup':
arch/powerpc/kernel/module_32.c:282: undefined reference to `module_bug_cleanup'
arch/powerpc/kernel/built-in.o: In function `module_finalize':
arch/powerpc/kernel/module_32.c:277: undefined reference to `module_bug_finalize'
make: [.tmp_vmlinux3] Error 1 (ignored)
KSYM .tmp_kallsyms3.S
powerpc-750-linux-gnu-nm: '.tmp_vmlinux3': No such file
No valid symbol.
make: [.tmp_kallsyms3.S] Error 1 (ignored)
AS .tmp_kallsyms3.o
LD vmlinux
arch/ppc/kernel/built-in.o: In function `find_bug':
arch/ppc/kernel/traps.c:582: undefined reference to `module_find_bug'
arch/powerpc/kernel/built-in.o: In function `module_arch_cleanup':
arch/powerpc/kernel/module_32.c:282: undefined reference to `module_bug_cleanup'
arch/powerpc/kernel/built-in.o: In function `module_finalize':
arch/powerpc/kernel/module_32.c:277: undefined reference to `module_bug_finalize'
make: [vmlinux] Error 1 (ignored)
These changes match changes for using the generic bug libraries as in
'use-generic-bug-for-powerpc.patch' and gets rid of the compile errors.
Signed-off-by: Judith Lebzelter <judith@...l.org>
---
Files Edited:
arch/ppc/kernel/traps.c
arch/ppc/Kconfig
Index: linux/arch/ppc/Kconfig
===================================================================
--- linux.orig/arch/ppc/Kconfig 2006-10-03 16:11:26.456655259 -0700
+++ linux/arch/ppc/Kconfig 2006-10-03 17:10:09.398320057 -0700
@@ -52,6 +52,11 @@
bool
default y
+config GENERIC_BUG
+ bool
+ default y
+ depends on BUG
+
source "init/Kconfig"
menu "Processor"
Index: linux/arch/ppc/kernel/traps.c
===================================================================
--- linux.orig/arch/ppc/kernel/traps.c 2006-10-03 16:11:26.461653713 -0700
+++ linux/arch/ppc/kernel/traps.c 2006-10-04 10:00:21.198907987 -0700
@@ -28,6 +28,7 @@
#include <linux/init.h>
#include <linux/module.h>
#include <linux/prctl.h>
+#include <linux/bug.h>
#include <asm/pgtable.h>
#include <asm/uaccess.h>
@@ -568,55 +569,9 @@
*/
extern struct bug_entry __start___bug_table[], __stop___bug_table[];
-#ifndef CONFIG_MODULES
-#define module_find_bug(x) NULL
-#endif
-
-struct bug_entry *find_bug(unsigned long bugaddr)
+int is_valid_bugaddr(unsigned long addr)
{
- struct bug_entry *bug;
-
- for (bug = __start___bug_table; bug < __stop___bug_table; ++bug)
- if (bugaddr == bug->bug_addr)
- return bug;
- return module_find_bug(bugaddr);
-}
-
-int check_bug_trap(struct pt_regs *regs)
-{
- struct bug_entry *bug;
- unsigned long addr;
-
- if (regs->msr & MSR_PR)
- return 0; /* not in kernel */
- addr = regs->nip; /* address of trap instruction */
- if (addr < PAGE_OFFSET)
- return 0;
- bug = find_bug(regs->nip);
- if (bug == NULL)
- return 0;
- if (bug->line & BUG_WARNING_TRAP) {
- /* this is a WARN_ON rather than BUG/BUG_ON */
-#ifdef CONFIG_XMON
- xmon_printf(KERN_ERR "Badness in %s at %s:%ld\n",
- bug->function, bug->file,
- bug->line & ~BUG_WARNING_TRAP);
-#endif /* CONFIG_XMON */
- printk(KERN_ERR "Badness in %s at %s:%ld\n",
- bug->function, bug->file,
- bug->line & ~BUG_WARNING_TRAP);
- dump_stack();
- return 1;
- }
-#ifdef CONFIG_XMON
- xmon_printf(KERN_CRIT "kernel BUG in %s at %s:%ld!\n",
- bug->function, bug->file, bug->line);
- xmon(regs);
-#endif /* CONFIG_XMON */
- printk(KERN_CRIT "kernel BUG in %s at %s:%ld!\n",
- bug->function, bug->file, bug->line);
-
- return 0;
+ return addr >= PAGE_OFFSET;
}
void program_check_exception(struct pt_regs *regs)
@@ -671,7 +626,9 @@
/* trap exception */
if (debugger_bpt(regs))
return;
- if (check_bug_trap(regs)) {
+
+ if (!(regs->msr & MSR_PR) && /* not user-mode */
+ report_bug(regs->nip) == BUG_TRAP_TYPE_WARN) {
regs->nip += 4;
return;
}
-
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