diff options
author | Ingo Molnar <mingo@elte.hu> | 2009-03-05 12:47:28 +0100 |
---|---|---|
committer | Ingo Molnar <mingo@elte.hu> | 2009-03-05 12:47:28 +0100 |
commit | 7df4edb07cf54a4868b9a750424c0d2aa68f8d66 (patch) | |
tree | 0ad0ad3f3dcb6f9edf26dde42ba625053dddf54f /arch/sparc/mm/fault_64.c | |
parent | 0d688da5505d77bcef2441e0a22d8cc26459702d (diff) | |
parent | 559595a985e106d2fa9f0c79b7f5805453fed593 (diff) |
Merge branch 'linus' into core/iommu
Diffstat (limited to 'arch/sparc/mm/fault_64.c')
-rw-r--r-- | arch/sparc/mm/fault_64.c | 44 |
1 files changed, 38 insertions, 6 deletions
diff --git a/arch/sparc/mm/fault_64.c b/arch/sparc/mm/fault_64.c index a9e474bf638..4ab8993b086 100644 --- a/arch/sparc/mm/fault_64.c +++ b/arch/sparc/mm/fault_64.c @@ -19,6 +19,7 @@ #include <linux/interrupt.h> #include <linux/kprobes.h> #include <linux/kdebug.h> +#include <linux/percpu.h> #include <asm/page.h> #include <asm/pgtable.h> @@ -224,6 +225,30 @@ cannot_handle: unhandled_fault (address, current, regs); } +static void noinline bogus_32bit_fault_tpc(struct pt_regs *regs) +{ + static int times; + + if (times++ < 10) + printk(KERN_ERR "FAULT[%s:%d]: 32-bit process reports " + "64-bit TPC [%lx]\n", + current->comm, current->pid, + regs->tpc); + show_regs(regs); +} + +static void noinline bogus_32bit_fault_address(struct pt_regs *regs, + unsigned long addr) +{ + static int times; + + if (times++ < 10) + printk(KERN_ERR "FAULT[%s:%d]: 32-bit process " + "reports 64-bit fault address [%lx]\n", + current->comm, current->pid, addr); + show_regs(regs); +} + asmlinkage void __kprobes do_sparc64_fault(struct pt_regs *regs) { struct mm_struct *mm = current->mm; @@ -244,6 +269,19 @@ asmlinkage void __kprobes do_sparc64_fault(struct pt_regs *regs) (fault_code & FAULT_CODE_DTLB)) BUG(); + if (test_thread_flag(TIF_32BIT)) { + if (!(regs->tstate & TSTATE_PRIV)) { + if (unlikely((regs->tpc >> 32) != 0)) { + bogus_32bit_fault_tpc(regs); + goto intr_or_no_mm; + } + } + if (unlikely((address >> 32) != 0)) { + bogus_32bit_fault_address(regs, address); + goto intr_or_no_mm; + } + } + if (regs->tstate & TSTATE_PRIV) { unsigned long tpc = regs->tpc; @@ -264,12 +302,6 @@ asmlinkage void __kprobes do_sparc64_fault(struct pt_regs *regs) if (in_atomic() || !mm) goto intr_or_no_mm; - if (test_thread_flag(TIF_32BIT)) { - if (!(regs->tstate & TSTATE_PRIV)) - regs->tpc &= 0xffffffff; - address &= 0xffffffff; - } - if (!down_read_trylock(&mm->mmap_sem)) { if ((regs->tstate & TSTATE_PRIV) && !search_exception_tables(regs->tpc)) { |