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author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-01-06 21:59:14 (GMT) |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-01-06 21:59:14 (GMT) |
commit | 69734b644bf19f20d2989e1a8e5bf59c837ee5c1 (patch) | |
tree | b1afd22d6e84db04516e466c223d67c1c340e6d9 /arch/x86/mm | |
parent | 67b0243131150391125d8d0beb5359d7aec78b55 (diff) | |
parent | ceb7b40b65539a771d1bfaf47660ac0ee57e0c4f (diff) | |
download | linux-69734b644bf19f20d2989e1a8e5bf59c837ee5c1.tar.xz |
Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
* 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (21 commits)
x86: Fix atomic64_xxx_cx8() functions
x86: Fix and improve cmpxchg_double{,_local}()
x86_64, asm: Optimise fls(), ffs() and fls64()
x86, bitops: Move fls64.h inside __KERNEL__
x86: Fix and improve percpu_cmpxchg{8,16}b_double()
x86: Report cpb and eff_freq_ro flags correctly
x86/i386: Use less assembly in strlen(), speed things up a bit
x86: Use the same node_distance for 32 and 64-bit
x86: Fix rflags in FAKE_STACK_FRAME
x86: Clean up and extend do_int3()
x86: Call do_notify_resume() with interrupts enabled
x86/div64: Add a micro-optimization shortcut if base is power of two
x86-64: Cleanup some assembly entry points
x86-64: Slightly shorten line system call entry and exit paths
x86-64: Reduce amount of redundant code generated for invalidate_interruptNN
x86-64: Slightly shorten int_ret_from_sys_call
x86, efi: Convert efi_phys_get_time() args to physical addresses
x86: Default to vsyscall=emulate
x86-64: Set siginfo and context on vsyscall emulation faults
x86: consolidate xchg and xadd macros
...
Diffstat (limited to 'arch/x86/mm')
-rw-r--r-- | arch/x86/mm/extable.c | 2 | ||||
-rw-r--r-- | arch/x86/mm/fault.c | 22 |
2 files changed, 17 insertions, 7 deletions
diff --git a/arch/x86/mm/extable.c b/arch/x86/mm/extable.c index d0474ad..1fb85db 100644 --- a/arch/x86/mm/extable.c +++ b/arch/x86/mm/extable.c @@ -25,7 +25,7 @@ int fixup_exception(struct pt_regs *regs) if (fixup) { /* If fixup is less than 16, it means uaccess error */ if (fixup->fixup < 16) { - current_thread_info()->uaccess_err = -EFAULT; + current_thread_info()->uaccess_err = 1; regs->ip += fixup->fixup; return 1; } diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c index 5db0490..9d74824 100644 --- a/arch/x86/mm/fault.c +++ b/arch/x86/mm/fault.c @@ -626,7 +626,7 @@ pgtable_bad(struct pt_regs *regs, unsigned long error_code, static noinline void no_context(struct pt_regs *regs, unsigned long error_code, - unsigned long address) + unsigned long address, int signal, int si_code) { struct task_struct *tsk = current; unsigned long *stackend; @@ -634,8 +634,17 @@ no_context(struct pt_regs *regs, unsigned long error_code, int sig; /* Are we prepared to handle this kernel fault? */ - if (fixup_exception(regs)) + if (fixup_exception(regs)) { + if (current_thread_info()->sig_on_uaccess_error && signal) { + tsk->thread.trap_no = 14; + tsk->thread.error_code = error_code | PF_USER; + tsk->thread.cr2 = address; + + /* XXX: hwpoison faults will set the wrong code. */ + force_sig_info_fault(signal, si_code, address, tsk, 0); + } return; + } /* * 32-bit: @@ -755,7 +764,7 @@ __bad_area_nosemaphore(struct pt_regs *regs, unsigned long error_code, if (is_f00f_bug(regs, address)) return; - no_context(regs, error_code, address); + no_context(regs, error_code, address, SIGSEGV, si_code); } static noinline void @@ -819,7 +828,7 @@ do_sigbus(struct pt_regs *regs, unsigned long error_code, unsigned long address, /* Kernel mode? Handle exceptions or die: */ if (!(error_code & PF_USER)) { - no_context(regs, error_code, address); + no_context(regs, error_code, address, SIGBUS, BUS_ADRERR); return; } @@ -854,7 +863,7 @@ mm_fault_error(struct pt_regs *regs, unsigned long error_code, if (!(fault & VM_FAULT_RETRY)) up_read(¤t->mm->mmap_sem); if (!(error_code & PF_USER)) - no_context(regs, error_code, address); + no_context(regs, error_code, address, 0, 0); return 1; } if (!(fault & VM_FAULT_ERROR)) @@ -864,7 +873,8 @@ mm_fault_error(struct pt_regs *regs, unsigned long error_code, /* Kernel mode? Handle exceptions or die: */ if (!(error_code & PF_USER)) { up_read(¤t->mm->mmap_sem); - no_context(regs, error_code, address); + no_context(regs, error_code, address, + SIGSEGV, SEGV_MAPERR); return 1; } |