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Commit eeea3c3f authored by Roland McGrath's avatar Roland McGrath
Browse files

x86: tracehook syscall 



This changes x86 syscall tracing to use the new tracehook.h entry points.
There is no change, only cleanup.

Signed-off-by: default avatarRoland McGrath <roland@redhat.com>
parent 36a03308

arch/x86/kernel/ptrace.c

+6 −28
Original line number Diff line number Diff line
@@ -14,6 +14,7 @@ 
#include <linux/errno.h>

#include <linux/ptrace.h>

#include <linux/regset.h>

#include <linux/tracehook.h>

#include <linux/user.h>

#include <linux/elf.h>

#include <linux/security.h>
@@ -1375,30 +1376,6 @@ void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs, int error_code) 
	force_sig_info(SIGTRAP, &info, tsk);

}



static void syscall_trace(struct pt_regs *regs)

{

	if (!(current->ptrace & PT_PTRACED))

		return;



#if 0

	printk("trace %s ip %lx sp %lx ax %d origrax %d caller %lx tiflags %x ptrace %x\n",

	       current->comm,

	       regs->ip, regs->sp, regs->ax, regs->orig_ax, __builtin_return_address(0),

	       current_thread_info()->flags, current->ptrace);

#endif



	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;

	}

}



#ifdef CONFIG_X86_32

# define IS_IA32	1
@@ -1432,8 +1409,9 @@ asmregparm long syscall_trace_enter(struct pt_regs *regs) 
	if (unlikely(test_thread_flag(TIF_SYSCALL_EMU)))

		ret = -1L;



	if (ret || test_thread_flag(TIF_SYSCALL_TRACE))

		syscall_trace(regs);

	if ((ret || test_thread_flag(TIF_SYSCALL_TRACE)) &&

	    tracehook_report_syscall_entry(regs))

		ret = -1L;



	if (unlikely(current->audit_context)) {

		if (IS_IA32)
@@ -1459,7 +1437,7 @@ asmregparm void syscall_trace_leave(struct pt_regs *regs) 
		audit_syscall_exit(AUDITSC_RESULT(regs->ax), regs->ax);



	if (test_thread_flag(TIF_SYSCALL_TRACE))

		syscall_trace(regs);

		tracehook_report_syscall_exit(regs, 0);



	/*

	 * If TIF_SYSCALL_EMU is set, we only get here because of
@@ -1475,6 +1453,6 @@ asmregparm void syscall_trace_leave(struct pt_regs *regs) 
	 * system call instruction.

	 */

	if (test_thread_flag(TIF_SINGLESTEP) &&

	    (current->ptrace & PT_PTRACED))

	    tracehook_consider_fatal_signal(current, SIGTRAP, SIG_DFL))

		send_sigtrap(current, regs, 0);

}