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-rw-r--r--arch/blackfin/kernel/ptrace.c66
1 files changed, 17 insertions, 49 deletions
diff --git a/arch/blackfin/kernel/ptrace.c b/arch/blackfin/kernel/ptrace.c
index 92b4ca0b5af6..0618b8287e34 100644
--- a/arch/blackfin/kernel/ptrace.c
+++ b/arch/blackfin/kernel/ptrace.c
@@ -1,6 +1,6 @@
/*
* linux/kernel/ptrace.c is by Ross Biro 1/23/92, edited by Linus Torvalds
- * these modifications are Copyright 2004-2009 Analog Devices Inc.
+ * these modifications are Copyright 2004-2010 Analog Devices Inc.
*
* Licensed under the GPL-2
*/
@@ -15,6 +15,7 @@
#include <linux/user.h>
#include <linux/regset.h>
#include <linux/signal.h>
+#include <linux/tracehook.h>
#include <linux/uaccess.h>
#include <asm/page.h>
@@ -32,25 +33,6 @@
* in exit.c or in signal.c.
*/
-/* Find the stack offset for a register, relative to thread.esp0. */
-#define PT_REG(reg) ((long)&((struct pt_regs *)0)->reg)
-
-/*
- * Get the address of the live pt_regs for the specified task.
- * These are saved onto the top kernel stack when the process
- * is not running.
- *
- * Note: if a user thread is execve'd from kernel space, the
- * kernel stack will not be empty on entry to the kernel, so
- * ptracing these tasks will fail.
- */
-static inline struct pt_regs *task_pt_regs(struct task_struct *task)
-{
- return (struct pt_regs *)
- ((unsigned long)task_stack_page(task) +
- (THREAD_SIZE - sizeof(struct pt_regs)));
-}
-
/*
* Get contents of register REGNO in task TASK.
*/
@@ -234,18 +216,13 @@ const struct user_regset_view *task_user_regset_view(struct task_struct *task)
return &user_bfin_native_view;
}
-void ptrace_enable(struct task_struct *child)
+void user_enable_single_step(struct task_struct *child)
{
struct pt_regs *regs = task_pt_regs(child);
regs->syscfg |= SYSCFG_SSSTEP;
}
-/*
- * Called by kernel/ptrace.c when detaching..
- *
- * Make sure the single step bit is not set.
- */
-void ptrace_disable(struct task_struct *child)
+void user_disable_single_step(struct task_struct *child)
{
struct pt_regs *regs = task_pt_regs(child);
regs->syscfg &= ~SYSCFG_SSSTEP;
@@ -412,27 +389,18 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
return ret;
}
-asmlinkage void syscall_trace(void)
+asmlinkage int syscall_trace_enter(struct pt_regs *regs)
{
- if (!test_thread_flag(TIF_SYSCALL_TRACE))
- return;
-
- if (!(current->ptrace & PT_PTRACED))
- return;
-
- /* the 0x80 provides a way for the tracing parent to distinguish
- * between a syscall stop and SIGTRAP delivery
- */
- ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
- ? 0x80 : 0));
-
- /*
- * this isn't the same as continuing with a signal, but it will do
- * for normal use. strace only continues with a signal if the
- * stopping signal is not SIGTRAP. -brl
- */
- if (current->exit_code) {
- send_sig(current->exit_code, current, 1);
- current->exit_code = 0;
- }
+ int ret = 0;
+
+ if (test_thread_flag(TIF_SYSCALL_TRACE))
+ ret = tracehook_report_syscall_entry(regs);
+
+ return ret;
+}
+
+asmlinkage void syscall_trace_leave(struct pt_regs *regs)
+{
+ if (test_thread_flag(TIF_SYSCALL_TRACE))
+ tracehook_report_syscall_exit(regs, 0);
}