diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/sh/kernel/process.c | 15 | ||||
| -rw-r--r-- | arch/sh/kernel/traps.c | 19 | ||||
| -rw-r--r-- | arch/sh/mm/fault.c | 39 |
3 files changed, 66 insertions, 7 deletions
diff --git a/arch/sh/kernel/process.c b/arch/sh/kernel/process.c index 286c80388bf5..329b3f3051de 100644 --- a/arch/sh/kernel/process.c +++ b/arch/sh/kernel/process.c @@ -7,7 +7,7 @@ * * SuperH version: Copyright (C) 1999, 2000 Niibe Yutaka & Kaz Kojima * Copyright (C) 2006 Lineo Solutions Inc. support SH4A UBC - * Copyright (C) 2002 - 2006 Paul Mundt + * Copyright (C) 2002 - 2007 Paul Mundt */ #include <linux/module.h> #include <linux/mm.h> @@ -15,6 +15,7 @@ #include <linux/pm.h> #include <linux/kallsyms.h> #include <linux/kexec.h> +#include <asm/kdebug.h> #include <asm/uaccess.h> #include <asm/mmu_context.h> #include <asm/ubc.h> @@ -299,8 +300,8 @@ static void ubc_set_tracing(int asid, unsigned long pc) ctrl_outl(0, UBC_BAMRA); if (current_cpu_data.type == CPU_SH7729 || - current_cpu_data.type == CPU_SH7710 || - current_cpu_data.type == CPU_SH7712 ) { + current_cpu_data.type == CPU_SH7710 || + current_cpu_data.type == CPU_SH7712) { ctrl_outw(BBR_INST | BBR_READ | BBR_CPU, UBC_BBRA); ctrl_outl(BRCR_PCBA | BRCR_PCTE, UBC_BRCR); } else { @@ -496,6 +497,10 @@ asmlinkage void debug_trap_handler(unsigned long r4, unsigned long r5, /* Rewind */ regs->pc -= 2; + if (notify_die(DIE_TRAP, regs, regs->tra & 0xff, + SIGTRAP) == NOTIFY_STOP) + return; + force_sig(SIGTRAP, current); } @@ -511,6 +516,10 @@ asmlinkage void bug_trap_handler(unsigned long r4, unsigned long r5, /* Rewind */ regs->pc -= 2; + if (notify_die(DIE_TRAP, regs, TRAPA_BUG_OPCODE & 0xff, + SIGTRAP) == NOTIFY_STOP) + return; + #ifdef CONFIG_BUG if (__kernel_text_address(instruction_pointer(regs))) { u16 insn = *(u16 *)instruction_pointer(regs); diff --git a/arch/sh/kernel/traps.c b/arch/sh/kernel/traps.c index 77107838271f..7b40f0ff3dfc 100644 --- a/arch/sh/kernel/traps.c +++ b/arch/sh/kernel/traps.c @@ -5,7 +5,7 @@ * SuperH version: Copyright (C) 1999 Niibe Yutaka * Copyright (C) 2000 Philipp Rumpf * Copyright (C) 2000 David Howells - * Copyright (C) 2002 - 2006 Paul Mundt + * Copyright (C) 2002 - 2007 Paul Mundt * * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive @@ -23,6 +23,7 @@ #include <linux/limits.h> #include <asm/system.h> #include <asm/uaccess.h> +#include <asm/kdebug.h> #ifdef CONFIG_SH_KGDB #include <asm/kgdb.h> @@ -75,7 +76,21 @@ static void dump_mem(const char *str, unsigned long bottom, unsigned long top) } } -DEFINE_SPINLOCK(die_lock); +ATOMIC_NOTIFIER_HEAD(shdie_chain); + +int register_die_notifier(struct notifier_block *nb) +{ + return atomic_notifier_chain_register(&shdie_chain, nb); +} +EXPORT_SYMBOL(register_die_notifier); + +int unregister_die_notifier(struct notifier_block *nb) +{ + return atomic_notifier_chain_unregister(&shdie_chain, nb); +} +EXPORT_SYMBOL(unregister_die_notifier); + +static DEFINE_SPINLOCK(die_lock); void die(const char * str, struct pt_regs * regs, long err) { diff --git a/arch/sh/mm/fault.c b/arch/sh/mm/fault.c index fa5d7f0b9f18..0ecc117cade4 100644 --- a/arch/sh/mm/fault.c +++ b/arch/sh/mm/fault.c @@ -2,7 +2,7 @@ * Page fault handler for SH with an MMU. * * Copyright (C) 1999 Niibe Yutaka - * Copyright (C) 2003 Paul Mundt + * Copyright (C) 2003 - 2007 Paul Mundt * * Based on linux/arch/i386/mm/fault.c: * Copyright (C) 1995 Linus Torvalds @@ -15,12 +15,42 @@ #include <linux/mm.h> #include <linux/hardirq.h> #include <linux/kprobes.h> +#include <asm/kdebug.h> #include <asm/system.h> #include <asm/mmu_context.h> #include <asm/tlbflush.h> #include <asm/kgdb.h> -extern void die(const char *,struct pt_regs *,long); +#ifdef CONFIG_KPROBES +ATOMIC_NOTIFIER_HEAD(notify_page_fault_chain); + +/* Hook to register for page fault notifications */ +int register_page_fault_notifier(struct notifier_block *nb) +{ + return atomic_notifier_chain_register(¬ify_page_fault_chain, nb); +} + +int unregister_page_fault_notifier(struct notifier_block *nb) +{ + return atomic_notifier_chain_unregister(¬ify_page_fault_chain, nb); +} + +static inline int notify_page_fault(enum die_val val, struct pt_regs *regs, + int trap, int sig) +{ + struct die_args args = { + .regs = regs, + .trapnr = trap, + }; + return atomic_notifier_call_chain(¬ify_page_fault_chain, val, &args); +} +#else +static inline int notify_page_fault(enum die_val val, struct pt_regs *regs, + int trap, int sig) +{ + return NOTIFY_DONE; +} +#endif /* * This routine handles page faults. It determines the address, @@ -39,6 +69,11 @@ asmlinkage void __kprobes do_page_fault(struct pt_regs *regs, siginfo_t info; trace_hardirqs_on(); + + if (notify_page_fault(DIE_PAGE_FAULT, regs, + writeaccess, SIGSEGV) == NOTIFY_STOP) + return; + local_irq_enable(); #ifdef CONFIG_SH_KGDB |