diff options
Diffstat (limited to 'arch/x86_64/ia32/ptrace32.c')
| -rw-r--r-- | arch/x86_64/ia32/ptrace32.c | 44 |
1 files changed, 11 insertions, 33 deletions
diff --git a/arch/x86_64/ia32/ptrace32.c b/arch/x86_64/ia32/ptrace32.c index 2a925e2af39..5f4cdfa5690 100644 --- a/arch/x86_64/ia32/ptrace32.c +++ b/arch/x86_64/ia32/ptrace32.c @@ -196,36 +196,6 @@ static int getreg32(struct task_struct *child, unsigned regno, u32 *val) #undef R32 -static struct task_struct *find_target(int request, int pid, int *err) -{ - struct task_struct *child; - - *err = -EPERM; - if (pid == 1) - return NULL; - - *err = -ESRCH; - read_lock(&tasklist_lock); - child = find_task_by_pid(pid); - if (child) - get_task_struct(child); - read_unlock(&tasklist_lock); - if (child) { - *err = -EPERM; - if (child->pid == 1) - goto out; - *err = ptrace_check_attach(child, request == PTRACE_KILL); - if (*err < 0) - goto out; - return child; - } - out: - if (child) - put_task_struct(child); - return NULL; - -} - asmlinkage long sys32_ptrace(long request, u32 pid, u32 addr, u32 data) { struct task_struct *child; @@ -254,9 +224,16 @@ asmlinkage long sys32_ptrace(long request, u32 pid, u32 addr, u32 data) break; } - child = find_target(request, pid, &ret); - if (!child) - return ret; + if (request == PTRACE_TRACEME) + return ptrace_traceme(); + + child = ptrace_get_task_struct(pid); + if (IS_ERR(child)) + return PTR_ERR(child); + + ret = ptrace_check_attach(child, request == PTRACE_KILL); + if (ret < 0) + goto out; childregs = (struct pt_regs *)(child->thread.rsp0 - sizeof(struct pt_regs)); @@ -373,6 +350,7 @@ asmlinkage long sys32_ptrace(long request, u32 pid, u32 addr, u32 data) break; } + out: put_task_struct(child); return ret; } |