Eric Lee / smarc-fsl-linux-kernel

28 May, 2008

1 commit

  • 4dcc29e15   [IA64] Workaround for RSE issue ... Browse Code »

    Problem: An application violating the architectural rules regarding
    operation dependencies and having specific Register Stack Engine (RSE)
    state at the time of the violation, may result in an illegal operation
    fault and invalid RSE state. Such faults may initiate a cascade of
    repeated illegal operation faults within OS interruption handlers.
    The specific behavior is OS dependent.

    Implication: An application causing an illegal operation fault with
    specific RSE state may result in a series of illegal operation faults
    and an eventual OS stack overflow condition.

    Workaround: OS interruption handlers that switch to kernel backing
    store implement a check for invalid RSE state to avoid the series
    of illegal operation faults.

    The core of the workaround is the RSE_WORKAROUND code sequence
    inserted into each invocation of the SAVE_MIN_WITH_COVER and
    SAVE_MIN_WITH_COVER_R19 macros. This sequence includes hard-coded
    constants that depend on the number of stacked physical registers
    being 96. The rest of this patch consists of code to disable this
    workaround should this not be the case (with the presumption that
    if a future Itanium processor increases the number of registers, it
    would also remove the need for this patch).

    Move the start of the RBS up to a mod32 boundary to avoid some
    corner cases.

    The dispatch_illegal_op_fault code outgrew the spot it was
    squatting in when built with this patch and CONFIG_VIRT_CPU_ACCOUNTING=y
    Move it out to the end of the ivt.

    Signed-off-by: Tony Luck

    Tony Luck
     

06 Mar, 2008

2 commits

09 Feb, 2008

2 commits

  • aa91a2e90   [IA64] Synchronize RBS on PTRACE_ATTACH ... Browse Code »

    When attaching to a stopped process, the RSE must be explicitly
    synced to user-space, so the debugger can read the correct values.

    Signed-off-by: Petr Tesarik
    CC: Roland McGrath
    Signed-off-by: Tony Luck

    Petr Tesarik
     
  • 3b2ce0b17   [IA64] Synchronize kernel RSE to user-space and back ... Browse Code »

    This is base kernel patch for ptrace RSE bug. It's basically a backport
    from the utrace RSE patch I sent out several weeks ago. please review.

    when a thread is stopped (ptraced), debugger might change thread's user
    stack (change memory directly), and we must avoid the RSE stored in
    kernel to override user stack (user space's RSE is newer than kernel's
    in the case). To workaround the issue, we copy kernel RSE to user RSE
    before the task is stopped, so user RSE has updated data. we then copy
    user RSE to kernel after the task is resummed from traced stop and
    kernel will use the newer RSE to return to user.

    Signed-off-by: Shaohua Li
    Signed-off-by: Petr Tesarik
    CC: Roland McGrath
    Signed-off-by: Tony Luck

    Petr Tesarik
     

02 Oct, 2006

1 commit

  • b3f827cb0   [PATCH] Add regs_return_value() helper ... Browse Code »

    Add the regs_return_value() macro to extract the return value in an
    architecture agnostic manner, given the pt_regs.

    Other architecture maintainers may want to add similar helpers.

    Signed-off-by: Ananth N Mavinakayanahalli
    Signed-off-by: Anil S Keshavamurthy
    Signed-off-by: Martin Schwidefsky
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Ananth N Mavinakayanahalli
     

17 Sep, 2006

1 commit

  • d5759641f   [PATCH] Fix 'make headers_check' on ia64 ... Browse Code »

    On Tue, 2006-09-12 at 17:44 +0100, David Woodhouse wrote:
    > asm-ia64/ptrace.h requires asm/asm-offsets.h, which does not exist
    > asm-ia64/resource.h requires asm/ustack.h, which does not exist

    Hide parts which shouldn't be visible to userspace.

    Signed-off-by: David Woodhouse
    Cc: Sam Ravnborg
    Cc: "Luck, Tony"
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    David Woodhouse
     

26 Apr, 2006

1 commit

13 Jan, 2006

1 commit

07 Nov, 2005

1 commit

  • 481bed454   [PATCH] consolidate sys_ptrace() ... Browse Code »

    The sys_ptrace boilerplate code (everything outside the big switch
    statement for the arch-specific requests) is shared by most architectures.
    This patch moves it to kernel/ptrace.c and leaves the arch-specific code as
    arch_ptrace.

    Some architectures have a too different ptrace so we have to exclude them.
    They continue to keep their implementations. For sh64 I had to add a
    sh64_ptrace wrapper because it does some initialization on the first call.
    For um I removed an ifdefed SUBARCH_PTRACE_SPECIAL block, but
    SUBARCH_PTRACE_SPECIAL isn't defined anywhere in the tree.

    Signed-off-by: Christoph Hellwig
    Acked-by: Paul Mackerras
    Acked-by: Ralf Baechle
    Acked-By: David Howells
    Acked-by: Russell King
    Acked-by: Paul Mundt
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Christoph Hellwig
     

13 Sep, 2005

1 commit

12 Sep, 2005

1 commit

10 Sep, 2005

1 commit

17 Apr, 2005

1 commit

  • 1da177e4c   Linux-2.6.12-rc2 ... Browse Code »

    Initial git repository build. I'm not bothering with the full history,
    even though we have it. We can create a separate "historical" git
    archive of that later if we want to, and in the meantime it's about
    3.2GB when imported into git - space that would just make the early
    git days unnecessarily complicated, when we don't have a lot of good
    infrastructure for it.

    Let it rip!

    Linus Torvalds