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| author | Yury Polyanskiy <ypolyans@princeton.edu> | 2010-04-26 00:53:10 -0400 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2010-04-30 20:52:45 +0100 |
| commit | ce384d83d00ee457c3931d3fdb9fa2c38e345a3c (patch) | |
| tree | 9f2a8a21236f0a270118d393e893cdc4986d229b /arch/mips | |
| parent | fcf3ca4c3d6d911df8ee2b8f010ffe504d3aef71 (diff) | |
| download | op-kernel-dev-ce384d83d00ee457c3931d3fdb9fa2c38e345a3c.zip op-kernel-dev-ce384d83d00ee457c3931d3fdb9fa2c38e345a3c.tar.gz | |
MIPS: die() does not call die notifier chain
The MIPS implementation of die() forgets to call notify_die() and thus notifiers
registered via register_die_notifier() are not called. This results in kgdb not
being activated on exceptions.
The only subtlety is that notify_die declares its regs argument w/o const, so
the const had to be removed from mips die() as well.
[Ralf: Fixed build error for SGI IP22 and IP28 platforms.]
Signed-off-by: Yury Polyanskiy <ypolyans@princeton.edu>
Cc: linux-mips@linux-mips.org
Patchworks: http://patchwork.linux-mips.org/patch/1142/
Acked-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
---
Diffstat (limited to 'arch/mips')
| -rw-r--r-- | arch/mips/include/asm/ptrace.h | 4 | ||||
| -rw-r--r-- | arch/mips/kernel/traps.c | 9 | ||||
| -rw-r--r-- | arch/mips/sgi-ip22/ip22-berr.c | 2 | ||||
| -rw-r--r-- | arch/mips/sgi-ip22/ip28-berr.c | 2 |
4 files changed, 11 insertions, 6 deletions
diff --git a/arch/mips/include/asm/ptrace.h b/arch/mips/include/asm/ptrace.h index ce47118..cdc6a46 100644 --- a/arch/mips/include/asm/ptrace.h +++ b/arch/mips/include/asm/ptrace.h @@ -142,9 +142,9 @@ extern int ptrace_set_watch_regs(struct task_struct *child, extern asmlinkage void do_syscall_trace(struct pt_regs *regs, int entryexit); -extern NORET_TYPE void die(const char *, const struct pt_regs *) ATTRIB_NORET; +extern NORET_TYPE void die(const char *, struct pt_regs *) ATTRIB_NORET; -static inline void die_if_kernel(const char *str, const struct pt_regs *regs) +static inline void die_if_kernel(const char *str, struct pt_regs *regs) { if (unlikely(!user_mode(regs))) die(str, regs); diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c index 1a4dd65..36460c7 100644 --- a/arch/mips/kernel/traps.c +++ b/arch/mips/kernel/traps.c @@ -352,9 +352,10 @@ void show_registers(const struct pt_regs *regs) static DEFINE_SPINLOCK(die_lock); -void __noreturn die(const char * str, const struct pt_regs * regs) +void __noreturn die(const char * str, struct pt_regs * regs) { static int die_counter; + int sig = SIGSEGV; #ifdef CONFIG_MIPS_MT_SMTC unsigned long dvpret = dvpe(); #endif /* CONFIG_MIPS_MT_SMTC */ @@ -365,6 +366,10 @@ void __noreturn die(const char * str, const struct pt_regs * regs) #ifdef CONFIG_MIPS_MT_SMTC mips_mt_regdump(dvpret); #endif /* CONFIG_MIPS_MT_SMTC */ + + if (notify_die(DIE_OOPS, str, regs, 0, current->thread.trap_no, SIGSEGV) == NOTIFY_STOP) + sig = 0; + printk("%s[#%d]:\n", str, ++die_counter); show_registers(regs); add_taint(TAINT_DIE); @@ -379,7 +384,7 @@ void __noreturn die(const char * str, const struct pt_regs * regs) panic("Fatal exception"); } - do_exit(SIGSEGV); + do_exit(sig); } extern struct exception_table_entry __start___dbe_table[]; diff --git a/arch/mips/sgi-ip22/ip22-berr.c b/arch/mips/sgi-ip22/ip22-berr.c index de6a0cc..911d399 100644 --- a/arch/mips/sgi-ip22/ip22-berr.c +++ b/arch/mips/sgi-ip22/ip22-berr.c @@ -89,7 +89,7 @@ static void print_buserr(void) void ip22_be_interrupt(int irq) { const int field = 2 * sizeof(unsigned long); - const struct pt_regs *regs = get_irq_regs(); + struct pt_regs *regs = get_irq_regs(); save_and_clear_buserr(); print_buserr(); diff --git a/arch/mips/sgi-ip22/ip28-berr.c b/arch/mips/sgi-ip22/ip28-berr.c index 30e12e2..88c684e 100644 --- a/arch/mips/sgi-ip22/ip28-berr.c +++ b/arch/mips/sgi-ip22/ip28-berr.c @@ -453,7 +453,7 @@ mips_be_fatal: void ip22_be_interrupt(int irq) { - const struct pt_regs *regs = get_irq_regs(); + struct pt_regs *regs = get_irq_regs(); count_be_interrupt++; |
