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Commit 9e228ee9 authored by Mike Frysinger's avatar Mike Frysinger
Browse files

Blackfin: check for bad syscalls after tracing it 



We want to report all system calls (even invalid ones) to the tracing
layers, so check the NR only after we've notified.

Signed-off-by: default avatarMike Frysinger <vapier@gentoo.org>
parent 600482c1

arch/blackfin/mach-common/entry.S

+14 −9
Original line number Diff line number Diff line
@@ -626,13 +626,6 @@ ENTRY(_system_call) 
	p0 = [sp + PT_ORIG_P0];

#endif /* CONFIG_IPIPE */



	/* Check the System Call */

	r7 = __NR_syscall;

	/* System call number is passed in P0 */

	r6 = p0;

	cc = r6 < r7;

	if ! cc jump .Lbadsys;



	/* are we tracing syscalls?*/

	r7 = sp;

	r6.l = lo(ALIGN_PAGE_MASK);
@@ -645,6 +638,12 @@ ENTRY(_system_call) 
	CC = BITTST(r7,TIF_SINGLESTEP);

	if CC JUMP _sys_trace;



	/* Make sure the system call # is valid */

	p4 = __NR_syscall;

	/* System call number is passed in P0 */

	cc = p4 <= p0;

	if cc jump .Lbadsys;



	/* Execute the appropriate system call */



	p4 = p0;
@@ -741,9 +740,14 @@ _sys_trace: 
	r0 = sp;

	pseudo_long_call _syscall_trace_enter, p5;



	/* Execute the appropriate system call */



	/* Make sure the system call # is valid */

	p4 = [SP + PT_P0];

	p3 = __NR_syscall;

	cc = p3 <= p4;

	r0 = -ENOSYS;

	if cc jump .Lsys_trace_badsys;



	/* Execute the appropriate system call */

	p5.l = _sys_call_table;

	p5.h = _sys_call_table;

	p5 = p5 + (p4 << 2);
@@ -761,6 +765,7 @@ _sys_trace: 
	SP += -12;

	call (p5);

	SP += 24;

.Lsys_trace_badsys:

	[sp + PT_R0] = r0;



	r0 = sp;