X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=arch%2Fia64%2Fkernel%2Fptrace.c;h=9887c8787e7ad38490b425cdf77663a4a4e69106;hb=a82642fa190029a438c0d09edb0e5463a0fe9e1e;hp=bbb8bc7c0552cdb860a466df3e302698b35da58c;hpb=2d986010ad13a00b83851238d52601d6092df40e;p=linux-2.6-omap-h63xx.git diff --git a/arch/ia64/kernel/ptrace.c b/arch/ia64/kernel/ptrace.c index bbb8bc7c055..9887c8787e7 100644 --- a/arch/ia64/kernel/ptrace.c +++ b/arch/ia64/kernel/ptrace.c @@ -254,7 +254,7 @@ get_rnat (struct task_struct *task, struct switch_stack *sw, long num_regs, nbits; struct pt_regs *pt; - pt = ia64_task_regs(task); + pt = task_pt_regs(task); kbsp = (unsigned long *) sw->ar_bspstore; ubspstore = (unsigned long *) pt->ar_bspstore; @@ -314,7 +314,7 @@ put_rnat (struct task_struct *task, struct switch_stack *sw, struct pt_regs *pt; unsigned long cfm, *urbs_kargs; - pt = ia64_task_regs(task); + pt = task_pt_regs(task); kbsp = (unsigned long *) sw->ar_bspstore; ubspstore = (unsigned long *) pt->ar_bspstore; @@ -407,7 +407,7 @@ ia64_peek (struct task_struct *child, struct switch_stack *child_stack, urbs_end = (long *) user_rbs_end; laddr = (unsigned long *) addr; - child_regs = ia64_task_regs(child); + child_regs = task_pt_regs(child); bspstore = (unsigned long *) child_regs->ar_bspstore; krbs = (unsigned long *) child + IA64_RBS_OFFSET/8; if (on_kernel_rbs(addr, (unsigned long) bspstore, @@ -467,7 +467,7 @@ ia64_poke (struct task_struct *child, struct switch_stack *child_stack, struct pt_regs *child_regs; laddr = (unsigned long *) addr; - child_regs = ia64_task_regs(child); + child_regs = task_pt_regs(child); bspstore = (unsigned long *) child_regs->ar_bspstore; krbs = (unsigned long *) child + IA64_RBS_OFFSET/8; if (on_kernel_rbs(addr, (unsigned long) bspstore, @@ -567,7 +567,7 @@ thread_matches (struct task_struct *thread, unsigned long addr) */ return 0; - thread_regs = ia64_task_regs(thread); + thread_regs = task_pt_regs(thread); thread_rbs_end = ia64_get_user_rbs_end(thread, thread_regs, NULL); if (!on_kernel_rbs(addr, thread_regs->ar_bspstore, thread_rbs_end)) return 0; @@ -587,8 +587,9 @@ thread_matches (struct task_struct *thread, unsigned long addr) static struct task_struct * find_thread_for_addr (struct task_struct *child, unsigned long addr) { - struct task_struct *g, *p; + struct task_struct *p; struct mm_struct *mm; + struct list_head *this, *next; int mm_users; if (!(mm = get_task_mm(child))) @@ -600,28 +601,21 @@ find_thread_for_addr (struct task_struct *child, unsigned long addr) goto out; /* not multi-threaded */ /* - * First, traverse the child's thread-list. Good for scalability with - * NPTL-threads. + * Traverse the current process' children list. Every task that + * one attaches to becomes a child. And it is only attached children + * of the debugger that are of interest (ptrace_check_attach checks + * for this). */ - p = child; - do { - if (thread_matches(p, addr)) { - child = p; - goto out; - } - if (mm_users-- <= 1) - goto out; - } while ((p = next_thread(p)) != child); - - do_each_thread(g, p) { - if (child->mm != mm) + list_for_each_safe(this, next, ¤t->children) { + p = list_entry(this, struct task_struct, sibling); + if (p->mm != mm) continue; - if (thread_matches(p, addr)) { child = p; goto out; } - } while_each_thread(g, p); + } + out: mmput(mm); return child; @@ -633,7 +627,7 @@ find_thread_for_addr (struct task_struct *child, unsigned long addr) inline void ia64_flush_fph (struct task_struct *task) { - struct ia64_psr *psr = ia64_psr(ia64_task_regs(task)); + struct ia64_psr *psr = ia64_psr(task_pt_regs(task)); /* * Prevent migrating this task while @@ -659,7 +653,7 @@ ia64_flush_fph (struct task_struct *task) void ia64_sync_fph (struct task_struct *task) { - struct ia64_psr *psr = ia64_psr(ia64_task_regs(task)); + struct ia64_psr *psr = ia64_psr(task_pt_regs(task)); ia64_flush_fph(task); if (!(task->thread.flags & IA64_THREAD_FPH_VALID)) { @@ -800,7 +794,7 @@ access_uarea (struct task_struct *child, unsigned long addr, + offsetof(struct pt_regs, reg))) - pt = ia64_task_regs(child); + pt = task_pt_regs(child); sw = (struct switch_stack *) (child->thread.ksp + 16); if ((addr & 0x7) != 0) { @@ -1126,7 +1120,7 @@ ptrace_getregs (struct task_struct *child, struct pt_all_user_regs __user *ppr) if (!access_ok(VERIFY_WRITE, ppr, sizeof(struct pt_all_user_regs))) return -EIO; - pt = ia64_task_regs(child); + pt = task_pt_regs(child); sw = (struct switch_stack *) (child->thread.ksp + 16); unw_init_from_blocked_task(&info, child); if (unw_unwind_to_user(&info) < 0) { @@ -1271,7 +1265,7 @@ ptrace_setregs (struct task_struct *child, struct pt_all_user_regs __user *ppr) if (!access_ok(VERIFY_READ, ppr, sizeof(struct pt_all_user_regs))) return -EIO; - pt = ia64_task_regs(child); + pt = task_pt_regs(child); sw = (struct switch_stack *) (child->thread.ksp + 16); unw_init_from_blocked_task(&info, child); if (unw_unwind_to_user(&info) < 0) { @@ -1409,7 +1403,7 @@ ptrace_setregs (struct task_struct *child, struct pt_all_user_regs __user *ppr) void ptrace_disable (struct task_struct *child) { - struct ia64_psr *child_psr = ia64_psr(ia64_task_regs(child)); + struct ia64_psr *child_psr = ia64_psr(task_pt_regs(child)); /* make sure the single step/taken-branch trap bits are not set: */ child_psr->ss = 0; @@ -1428,14 +1422,7 @@ sys_ptrace (long request, pid_t pid, unsigned long addr, unsigned long data) lock_kernel(); ret = -EPERM; if (request == PTRACE_TRACEME) { - /* are we already being traced? */ - if (current->ptrace & PT_PTRACED) - goto out; - ret = security_ptrace(current->parent, current); - if (ret) - goto out; - current->ptrace |= PT_PTRACED; - ret = 0; + ret = ptrace_traceme(); goto out; } @@ -1469,7 +1456,7 @@ sys_ptrace (long request, pid_t pid, unsigned long addr, unsigned long data) if (ret < 0) goto out_tsk; - pt = ia64_task_regs(child); + pt = task_pt_regs(child); sw = (struct switch_stack *) (child->thread.ksp + 16); switch (request) { @@ -1669,8 +1656,14 @@ syscall_trace_leave (long arg0, long arg1, long arg2, long arg3, long arg4, long arg5, long arg6, long arg7, struct pt_regs regs) { - if (unlikely(current->audit_context)) - audit_syscall_exit(current, AUDITSC_RESULT(regs.r10), regs.r8); + if (unlikely(current->audit_context)) { + int success = AUDITSC_RESULT(regs.r10); + long result = regs.r8; + + if (success != AUDITSC_SUCCESS) + result = -result; + audit_syscall_exit(current, success, result); + } if (test_thread_flag(TIF_SYSCALL_TRACE) && (current->ptrace & PT_PTRACED))