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    Subject[PATCH 3.15 109/109] ARC: Implement ptrace(PTRACE_GET_THREAD_AREA)
    Date
    3.15-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Anton Kolesov <Anton.Kolesov@synopsys.com>

    commit a4b6cb735b25aa84a462a1985e3e43bebaf5beb4 upstream.

    This patch adds implementation of GET_THREAD_AREA ptrace request type. This
    is required by GDB to debug NPTL applications.

    Signed-off-by: Anton Kolesov <Anton.Kolesov@synopsys.com>
    Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    arch/arc/include/uapi/asm/ptrace.h | 1 +
    arch/arc/kernel/ptrace.c | 4 ++++
    2 files changed, 5 insertions(+)

    --- a/arch/arc/include/uapi/asm/ptrace.h
    +++ b/arch/arc/include/uapi/asm/ptrace.h
    @@ -11,6 +11,7 @@
    #ifndef _UAPI__ASM_ARC_PTRACE_H
    #define _UAPI__ASM_ARC_PTRACE_H

    +#define PTRACE_GET_THREAD_AREA 25

    #ifndef __ASSEMBLY__
    /*
    --- a/arch/arc/kernel/ptrace.c
    +++ b/arch/arc/kernel/ptrace.c
    @@ -146,6 +146,10 @@ long arch_ptrace(struct task_struct *chi
    pr_debug("REQ=%ld: ADDR =0x%lx, DATA=0x%lx)\n", request, addr, data);

    switch (request) {
    + case PTRACE_GET_THREAD_AREA:
    + ret = put_user(task_thread_info(child)->thr_ptr,
    + (unsigned long __user *)data);
    + break;
    default:
    ret = ptrace_request(child, request, addr, data);
    break;



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