Merge bk://nevyn.them.org:5000

into penguin.transmeta.com:/home/penguin/torvalds/repositories/kernel/linux

arch/alpha/kernel/asm-offsets.c

@@ -22,6 +22,7 @@ void foo(void)
 	BLANK();
 	DEFINE(PT_PTRACED, PT_PTRACED);
 	DEFINE(CLONE_VM, CLONE_VM);
+	DEFINE(CLONE_UNTRACED, CLONE_UNTRACED);
 	DEFINE(SIGCHLD, SIGCHLD);
 	BLANK();
 	DEFINE(HAE_CACHE, offsetof(struct alpha_machine_vector, hae_cache));

arch/alpha/kernel/entry.S

@@ -212,7 +212,7 @@ kernel_thread:
 	stq	$2, 152($30)		/* HAE */
 
 	/* Shuffle FLAGS to the front; add CLONE_VM.  */
-	ldi	$1, CLONE_VM
+	ldi	$1, CLONE_VM|CLONE_UNTRACED
 	or	$18, $1, $16
 	bsr	$26, sys_clone
 

arch/alpha/kernel/ptrace.c

@@ -383,7 +383,7 @@ sys_ptrace(long request, long pid, long addr, long data,
 		goto out;
 
 	default:
-		ret = -EIO;
+		ret = ptrace_request(child, request, addr, data);
 		goto out;
 	}
  out:
@@ -400,7 +400,8 @@ syscall_trace(void)
 		return;
 	if (!(current->ptrace & PT_PTRACED))
 		return;
-	current->exit_code = SIGTRAP;
+	current->exit_code = SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
+					? 0x80 : 0);
 	current->state = TASK_STOPPED;
 	notify_parent(current, SIGCHLD);
 	schedule();

arch/arm/kernel/process.c

@@ -403,7 +403,7 @@ pid_t kernel_thread(int (*fn)(void *), void *arg, unsigned long flags)
 	b	sys_exit					\n\
 1:	"
         : "=r" (__ret)
-        : "Ir" (flags), "I" (CLONE_VM), "r" (fn), "r" (arg)
+        : "Ir" (flags), "r" (CLONE_VM | CLONE_UNTRACED), "r" (fn), "r" (arg)
 	: "r0", "r1", "lr");
 	return __ret;
 }

arch/arm/kernel/ptrace.c

@@ -692,16 +692,8 @@ static int do_ptrace(int request, struct task_struct *child, long addr, long dat
 			ret = ptrace_setfpregs(child, (void *)data);
 			break;
 
-		case PTRACE_SETOPTIONS:
-			if (data & PTRACE_O_TRACESYSGOOD)
-				child->ptrace |= PT_TRACESYSGOOD;
-			else
-				child->ptrace &= ~PT_TRACESYSGOOD;
-			ret = 0;
-			break;
-
 		default:
-			ret = -EIO;
+			ret = ptrace_request(child, request, addr, data);
 			break;
 	}
 

arch/cris/kernel/entry.S

@@ -748,6 +748,7 @@ kernel_thread:
 	/* r11 is argument 2 to clone, the flags */
 	move.d  $r12, $r11
 	or.w	LCLONE_VM, $r11
+	or.w	LCLONE_UNTRACED, $r11
 
 	/* Save FN for later.  */
 	move.d	$r10, $r12

arch/cris/kernel/entryoffsets.c

@@ -57,5 +57,6 @@ OF (LTHREAD_DCCR, struct thread_struct, dccr)
 
 /* linux/sched.h values - doesn't have an #ifdef __ASSEMBLY__ for these.  */
 VAL (LCLONE_VM, CLONE_VM)
+VAL (LCLONE_UNTRACED, CLONE_UNTRACED)
 
 __asm__ (".endif");

arch/cris/kernel/ptrace.c

@@ -292,7 +292,7 @@ asmlinkage int sys_ptrace(long request, long pid, long addr, long data)
 		}
 
 		default:
-			ret = -EIO;
+			ret = ptrace_request(child, request, addr, data);
 			break;
 	}
 out_tsk:
@@ -307,10 +307,8 @@ asmlinkage void syscall_trace(void)
 	if ((current->ptrace & (PT_PTRACED | PT_TRACESYS)) !=
 	    (PT_PTRACED | PT_TRACESYS))
 		return;
-	/* TODO: make a way to distinguish between a syscall stop and SIGTRAP
-	 * delivery like in the i386 port ? 
-	 */
-	current->exit_code = SIGTRAP;
+	current->exit_code = SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
+					? 0x80 : 0);
 	current->state = TASK_STOPPED;
 	notify_parent(current, SIGCHLD);
 	schedule();

arch/i386/kernel/process.c

@@ -224,7 +224,7 @@ int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
 	regs.eflags = 0x286;
 
 	/* Ok, create the new process.. */
-	p = do_fork(flags | CLONE_VM, 0, &regs, 0, NULL);
+	p = do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, &regs, 0, NULL);
 	return IS_ERR(p) ? PTR_ERR(p) : p->pid;
 }
 

arch/i386/kernel/ptrace.c

@@ -416,17 +416,8 @@ asmlinkage int sys_ptrace(long request, long pid, long addr, long data)
 		break;
 	}
 
-	case PTRACE_SETOPTIONS: {
-		if (data & PTRACE_O_TRACESYSGOOD)
-			child->ptrace |= PT_TRACESYSGOOD;
-		else
-			child->ptrace &= ~PT_TRACESYSGOOD;
-		ret = 0;
-		break;
-	}
-
 	default:
-		ret = -EIO;
+		ret = ptrace_request(child, request, addr, data);
 		break;
 	}
 out_tsk:

arch/ia64/ia32/sys_ia32.c

@@ -3076,7 +3076,7 @@ sys32_ptrace (int request, pid_t pid, unsigned int addr, unsigned int data,
 		break;
 
 	      default:
-		ret = -EIO;
+		ret = ptrace_request(child, request, addr, data);
 		break;
 
 	}

arch/ia64/kernel/process.c

@@ -516,7 +516,7 @@ kernel_thread (int (*fn)(void *), void *arg, unsigned long flags)
 	struct task_struct *parent = current;
 	int result, tid;
 
-	tid = clone(flags | CLONE_VM, 0);
+	tid = clone(flags | CLONE_VM | CLONE_UNTRACED, 0);
 	if (parent != current) {
 		result = (*fn)(arg);
 		_exit(result);

arch/ia64/kernel/ptrace.c

@@ -1268,16 +1268,8 @@ sys_ptrace (long request, pid_t pid, unsigned long addr, unsigned long data,
 		ret = ptrace_setregs(child, (struct pt_all_user_regs*) data);
 		goto out_tsk;
 
-	      case PTRACE_SETOPTIONS:
-		if (data & PTRACE_O_TRACESYSGOOD)
-			child->ptrace |= PT_TRACESYSGOOD;
-		else
-			child->ptrace &= ~PT_TRACESYSGOOD;
-		ret = 0;
-		break;
-
 	      default:
-		ret = -EIO;
+		ret = ptrace_request(child, request, addr, data);
 		goto out_tsk;
 	}
   out_tsk:

arch/m68k/kernel/process.c

@@ -152,7 +152,7 @@ int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
 
 	{
 	register long retval __asm__ ("d0");
-	register long clone_arg __asm__ ("d1") = flags | CLONE_VM;
+	register long clone_arg __asm__ ("d1") = flags | CLONE_VM | CLONE_UNTRACED;
 
 	retval = __NR_clone;
 	__asm__ __volatile__

arch/m68k/kernel/ptrace.c

@@ -355,7 +355,7 @@ asmlinkage int sys_ptrace(long request, long pid, long addr, long data)
 		}
 
 		default:
-			ret = -EIO;
+			ret = ptrace_request(child, request, addr, data);
 			break;
 	}
 out_tsk:
@@ -370,7 +370,8 @@ asmlinkage void syscall_trace(void)
 	if (!current->thread.work.delayed_trace &&
 	    !current->thread.work.syscall_trace)
 		return;
-	current->exit_code = SIGTRAP;
+	current->exit_code = SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
+					? 0x80 : 0);
 	current->state = TASK_STOPPED;
 	notify_parent(current, SIGCHLD);
 	schedule();

arch/mips/kernel/process.c

@@ -176,7 +176,7 @@ int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
 		:"=r" (retval)
 		:"i" (__NR_clone), "i" (__NR_exit),
 		 "r" (arg), "r" (fn),
-		 "r" (flags | CLONE_VM)
+		 "r" (flags | CLONE_VM | CLONE_UNTRACED)
 		 /*
 		  * The called subroutine might have destroyed any of the
 		  * at, result, argument or temporary registers ...

arch/mips/kernel/ptrace.c

@@ -304,16 +304,8 @@ asmlinkage int sys_ptrace(long request, long pid, long addr, long data)
 		res = ptrace_detach(child, data);
 		break;
 
-	case PTRACE_SETOPTIONS:
-		if (data & PTRACE_O_TRACESYSGOOD)
-			child->ptrace |= PT_TRACESYSGOOD;
-		else
-			child->ptrace &= ~PT_TRACESYSGOOD;
-		res = 0;
-		break;
-
 	default:
-		res = -EIO;
+		res = ptrace_request(child, request, addr, data);
 		goto out;
 	}
 out_tsk:

arch/mips64/kernel/process.c

@@ -167,7 +167,7 @@ int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags)
 		"1:\tmove\t%0, $2"
 		:"=r" (retval)
 		:"i" (__NR_clone), "i" (__NR_exit), "r" (arg), "r" (fn),
-		 "r" (flags | CLONE_VM)
+		 "r" (flags | CLONE_VM | CLONE_UNTRACED)
 
 		 /* The called subroutine might have destroyed any of the
 		  * at, result, argument or temporary registers ...  */

arch/mips64/kernel/ptrace.c

@@ -275,17 +275,8 @@ asmlinkage int sys32_ptrace(int request, int pid, int addr, int data)
 		ret = ptrace_detach(child, data);
 		break;
 
-	case PTRACE_SETOPTIONS: {
-		if (data & PTRACE_O_TRACESYSGOOD)
-			child->ptrace |= PT_TRACESYSGOOD;
-		else
-			child->ptrace &= ~PT_TRACESYSGOOD;
-		ret = 0;
-		break;
-	}
-
 	default:
-		ret = -EIO;
+		ret = ptrace_request(child, request, addr, data);
 		break;
 	}
 
@@ -535,17 +526,8 @@ asmlinkage int sys_ptrace(long request, long pid, long addr, long data)
 		ret = ptrace_detach(child, data);
 		break;
 
-	case PTRACE_SETOPTIONS: {
-		if (data & PTRACE_O_TRACESYSGOOD)
-			child->ptrace |= PT_TRACESYSGOOD;
-		else
-			child->ptrace &= ~PT_TRACESYSGOOD;
-		ret = 0;
-		break;
-	}
-
 	default:
-		ret = -EIO;
+		ret = ptrace_request(child, request, addr, data);
 		break;
 	}
 

arch/parisc/kernel/entry.S

@@ -515,6 +515,7 @@ fault_vector_11:
 	 */
 
 #define CLONE_VM 0x100	/* Must agree with <linux/sched.h> */
+#define CLONE_UNTRACED 0x00800000
 
 	.export __kernel_thread, code
 	.import do_fork
@@ -531,7 +532,8 @@ __kernel_thread:
 #endif
 	STREG	%r26, PT_GR26(%r1)  /* Store function & argument for child */
 	STREG	%r25, PT_GR25(%r1)
-	ldo	CLONE_VM(%r0), %r26   /* Force CLONE_VM since only init_mm */
+	ldil	L%CLONE_UNTRACED, %r26
+	ldo	CLONE_VM(%r26), %r26   /* Force CLONE_VM since only init_mm */
 	or	%r26, %r24, %r26      /* will have kernel mappings.	 */
 	copy	%r0, %r25
 #ifdef __LP64__

arch/parisc/kernel/ptrace.c

@@ -385,7 +385,7 @@ long sys_ptrace(long request, pid_t pid, long addr, long data)
 		goto out_tsk;
 
 	default:
-		ret = -EIO;
+		ret = ptrace_request(child, request, addr, data);
 		goto out_tsk;
 	}
 
@@ -409,7 +409,8 @@ void syscall_trace(void)
 		return;
 	if (!(current->ptrace & PT_PTRACED))
 		return;
-	current->exit_code = SIGTRAP;
+	current->exit_code = SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
+					? 0x80 : 0);
 	current->state = TASK_STOPPED;
 	notify_parent(current, SIGCHLD);
 	schedule();

arch/ppc/kernel/misc.S

@@ -1005,6 +1005,7 @@ _GLOBAL(kernel_thread)
 	mr	r30,r3		/* function */
 	mr	r31,r4		/* argument */
 	ori	r3,r5,CLONE_VM	/* flags */
+	oris	r3,r3,CLONE_UNTRACED>>16
 	li	r0,__NR_clone
 	sc
 	cmpi	0,r3,0		/* parent or child? */

arch/ppc/kernel/ptrace.c

@@ -339,7 +339,7 @@ int sys_ptrace(long request, long pid, long addr, long data)
 #endif
 
 	default:
-		ret = -EIO;
+		ret = ptrace_request(child, request, addr, data);
 		break;
 	}
 out_tsk:
@@ -354,7 +354,8 @@ void do_syscall_trace(void)
         if (!test_thread_flag(TIF_SYSCALL_TRACE)
 	    || !(current->ptrace & PT_PTRACED))
 		return;
-	current->exit_code = SIGTRAP;
+	current->exit_code = SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
+					? 0x80 : 0);
 	current->state = TASK_STOPPED;
 	notify_parent(current, SIGCHLD);
 	schedule();

arch/ppc64/kernel/asm-offsets.c

@@ -157,6 +157,7 @@ int main(void)
 	DEFINE(_SRR1, STACK_FRAME_OVERHEAD+sizeof(struct pt_regs)+8);
 
 	DEFINE(CLONE_VM, CLONE_VM);
+	DEFINE(CLONE_UNTRACED, CLONE_UNTRACED);
 
 	return 0;
 }

arch/ppc64/kernel/misc.S

@@ -486,6 +486,7 @@ _GLOBAL(kernel_thread)
 	/* XXX fix this when we optimise syscall entry to not save volatiles */
 	mr	r6,r3		/* function */
 	ori	r3,r5,CLONE_VM	/* flags */
+	oris	r3,r3,(CLONE_UNTRACED>>16)
 	li	r0,__NR_clone
 	sc
 	cmpi	0,r3,0		/* parent or child? */

arch/ppc64/kernel/ptrace.c

@@ -276,7 +276,7 @@ int sys_ptrace(long request, long pid, long addr, long data)
 	}
 
 	default:
-		ret = -EIO;
+		ret = ptrace_request(child, request, addr, data);
 		break;
 	}
 out_tsk:
@@ -292,7 +292,8 @@ void do_syscall_trace(void)
 		return;
 	if (!(current->ptrace & PT_PTRACED))
 		return;
-	current->exit_code = SIGTRAP;
+	current->exit_code = SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
+					? 0x80 : 0);
 	current->state = TASK_STOPPED;
 	notify_parent(current, SIGCHLD);
 	schedule();

arch/ppc64/kernel/ptrace32.c

@@ -413,7 +413,7 @@ int sys32_ptrace(long request, long pid, unsigned long addr, unsigned long data)
 
 
 	default:
-		ret = -EIO;
+		ret = ptrace_request(child, request, addr, data);
 		break;
 	}
 out_tsk:

arch/s390/kernel/process.c

@@ -146,7 +146,7 @@ int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
 	regs.orig_gpr2 = -1;
 
 	/* Ok, create the new process.. */
-	p = do_fork(flags | CLONE_VM, 0, &regs, 0, NULL);
+	p = do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, &regs, 0, NULL);
 	return IS_ERR(p) ? PTR_ERR(p) : p->pid;
 }
 

arch/s390/kernel/ptrace.c

@@ -307,15 +307,8 @@ do_ptrace(struct task_struct *child, long request, long addr, long data)
 			copied += sizeof(unsigned long);
 		}
 		return 0;
-
-	case PTRACE_SETOPTIONS:
-		if (data & PTRACE_O_TRACESYSGOOD)
-			child->ptrace |= PT_TRACESYSGOOD;
-		else
-			child->ptrace &= ~PT_TRACESYSGOOD;
-		return 0;
 	}
-	return -EIO;
+	return ptrace_request(child, request, addr, data);
 }
 
 asmlinkage int sys_ptrace(long request, long pid, long addr, long data)

arch/s390x/kernel/process.c

@@ -143,7 +143,7 @@ int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
 	regs.orig_gpr2 = -1;
 
 	/* Ok, create the new process.. */
-	p = do_fork(flags | CLONE_VM, 0, &regs, 0, NULL);
+	p = do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, &regs, 0, NULL);
 	return IS_ERR(p) ? PTR_ERR(p) : p->pid;
 }
 

arch/s390x/kernel/ptrace.c

@@ -261,7 +261,7 @@ do_ptrace_normal(struct task_struct *child, long request, long addr, long data)
 		}
 		return 0;
 	}
-	return -EIO;
+	return ptrace_request(child, request, addr, data);
 }
 
 #ifdef CONFIG_S390_SUPPORT
@@ -469,7 +469,7 @@ do_ptrace_emu31(struct task_struct *child, long request, long addr, long data)
 		}
 		return 0;
 	}
-	return -EIO;
+	return ptrace_request(child, request, addr, data);
 }
 #endif
 
@@ -538,12 +538,6 @@ do_ptrace(struct task_struct *child, long request, long addr, long data)
 		/* detach a process that was attached. */
 		return ptrace_detach(child, data);
 
-	case PTRACE_SETOPTIONS:
-		if (data & PTRACE_O_TRACESYSGOOD)
-			child->ptrace |= PT_TRACESYSGOOD;
-		else
-			child->ptrace &= ~PT_TRACESYSGOOD;
-		return 0;
 	/* Do requests that differ for 31/64 bit */
 	default:
 #ifdef CONFIG_S390_SUPPORT
@@ -551,8 +545,8 @@ do_ptrace(struct task_struct *child, long request, long addr, long data)
 			return do_ptrace_emu31(child, request, addr, data);
 #endif
 		return do_ptrace_normal(child, request, addr, data);
-		
 	}
+	/* Not reached.  */
 	return -EIO;
 }
 

arch/sh/kernel/process.c

@@ -120,7 +120,7 @@ int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
 {	/* Don't use this in BL=1(cli).  Or else, CPU resets! */
 	register unsigned long __sc0 __asm__ ("r0");
 	register unsigned long __sc3 __asm__ ("r3") = __NR_clone;
-	register unsigned long __sc4 __asm__ ("r4") = (long) flags | CLONE_VM;
+	register unsigned long __sc4 __asm__ ("r4") = (long) flags | CLONE_VM | CLONE_UNTRACED;
 	register unsigned long __sc5 __asm__ ("r5") = 0;
 	register unsigned long __sc8 __asm__ ("r8") = (long) arg;
 	register unsigned long __sc9 __asm__ ("r9") = (long) fn;

arch/sh/kernel/ptrace.c

@@ -356,17 +356,8 @@ asmlinkage int sys_ptrace(long request, long pid, long addr, long data)
 		ret = ptrace_detach(child, data);
 		break;
 
-	case PTRACE_SETOPTIONS: {
-		if (data & PTRACE_O_TRACESYSGOOD)
-			child->ptrace |= PT_TRACESYSGOOD;
-		else
-			child->ptrace &= ~PT_TRACESYSGOOD;
-		ret = 0;
-		break;
-	}
-
 	default:
-		ret = -EIO;
+		ret = ptrace_request(child, request, addr, data);
 		break;
 	}
 out_tsk:

arch/sparc/kernel/process.c

@@ -726,7 +726,7 @@ pid_t kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
 			   /* Notreached by child. */
 			   "1: mov %%o0, %0\n\t" :
 			   "=r" (retval) :
-			   "i" (__NR_clone), "r" (flags | CLONE_VM),
+			   "i" (__NR_clone), "r" (flags | CLONE_VM | CLONE_UNTRACED),
 			   "i" (__NR_exit),  "r" (fn), "r" (arg) :
 			   "g1", "g2", "g3", "o0", "o1", "memory", "cc");
 	return retval;

arch/sparc/kernel/ptrace.c

@@ -584,10 +584,15 @@ asmlinkage void do_ptrace(struct pt_regs *regs)
 
 	/* PTRACE_DUMPCORE unsupported... */
 
-	default:
-		pt_error_return(regs, EIO);
+	default: {
+		int err = ptrace_request(child, request, addr, data);
+		if (err)
+			pt_error_return(regs, -err);
+		else
+			pt_succ_return(regs, 0);
 		goto out_tsk;
 	}
+	}
 out_tsk:
 	if (child)
 		put_task_struct(child);
@@ -604,7 +609,8 @@ asmlinkage void syscall_trace(void)
 		return;
 	if (!(current->ptrace & PT_PTRACED))
 		return;
-	current->exit_code = SIGTRAP;
+	current->exit_code = SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
+					? 0x80 : 0);
 	current->state = TASK_STOPPED;
 	current->thread.flags ^= MAGIC_CONSTANT;
 	notify_parent(current, SIGCHLD);

arch/sparc64/kernel/process.c

@@ -694,7 +694,7 @@ pid_t kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
 			   /* Notreached by child. */
 			   "1:" :
 			   "=r" (retval) :
-			   "i" (__NR_clone), "r" (flags | CLONE_VM),
+			   "i" (__NR_clone), "r" (flags | CLONE_VM | CLONE_UNTRACED),
 			   "i" (__NR_exit),  "r" (fn), "r" (arg) :
 			   "g1", "g2", "g3", "o0", "o1", "memory", "cc");
 	return retval;

arch/sparc64/kernel/ptrace.c

@@ -571,10 +571,15 @@ asmlinkage void do_ptrace(struct pt_regs *regs)
 
 	/* PTRACE_DUMPCORE unsupported... */
 
-	default:
-		pt_error_return(regs, EIO);
+	default: {
+		int err = ptrace_request(child, request, addr, data);
+		if (err)
+			pt_error_return(regs, -err);
+		else
+			pt_succ_return(regs, 0);
 		goto out_tsk;
 	}
+	}
 flush_and_out:
 	{
 		unsigned long va;
@@ -612,7 +617,8 @@ asmlinkage void syscall_trace(void)
 		return;
 	if (!(current->ptrace & PT_PTRACED))
 		return;
-	current->exit_code = SIGTRAP;
+	current->exit_code = SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
+					? 0x80 : 0);
 	current->state = TASK_STOPPED;
 	notify_parent(current, SIGCHLD);
 	schedule();

arch/x86_64/ia32/ptrace32.c

@@ -185,17 +185,6 @@ asmlinkage long sys32_ptrace(long request, u32 pid, u32 addr, u32 data)
 	__u32 val;
 
 	switch (request) { 
-	case PTRACE_TRACEME:
-	case PTRACE_ATTACH:
-	case PTRACE_SYSCALL:
-	case PTRACE_CONT:
-	case PTRACE_KILL:
-	case PTRACE_SINGLESTEP:
-	case PTRACE_DETACH:
-	case PTRACE_SETOPTIONS:
-		ret = sys_ptrace(request, pid, addr, data); 
-		return ret;
-
 	case PTRACE_PEEKTEXT:
 	case PTRACE_PEEKDATA:
 	case PTRACE_POKEDATA:
@@ -211,7 +200,8 @@ asmlinkage long sys32_ptrace(long request, u32 pid, u32 addr, u32 data)
 		break;
 		
 	default:
-		return -EIO;
+		ret = sys_ptrace(request, pid, addr, data); 
+		return ret;
 	} 
 
 	child = find_target(request, pid, &ret);

arch/x86_64/kernel/process.c

@@ -59,7 +59,7 @@
 asmlinkage extern void ret_from_fork(void);
 int sys_arch_prctl(int code, unsigned long addr);
 
-unsigned long kernel_thread_flags = CLONE_VM;
+unsigned long kernel_thread_flags = CLONE_VM | CLONE_UNTRACED;
 
 int hlt_counter;
 

arch/x86_64/kernel/ptrace.c

@@ -405,17 +405,8 @@ asmlinkage long sys_ptrace(long request, long pid, long addr, long data)
 		break;
 	}
 
-	case PTRACE_SETOPTIONS: {
-		if (data & PTRACE_O_TRACESYSGOOD)
-			child->ptrace |= PT_TRACESYSGOOD;
-		else
-			child->ptrace &= ~PT_TRACESYSGOOD;
-		ret = 0;
-		break;
-	}
-
 	default:
-		ret = -EIO;
+		ret = ptrace_request(child, request, addr, data);
 		break;
 	}
 out_tsk:

fs/binfmt_aout.c

@@ -426,8 +426,12 @@ static int load_aout_binary(struct linux_binprm * bprm, struct pt_regs * regs)
 	regs->gp = ex.a_gpvalue;
 #endif
 	start_thread(regs, ex.a_entry, current->mm->start_stack);
-	if (current->ptrace & PT_PTRACED)
+	if (unlikely(current->ptrace & PT_PTRACED)) {
+		if (current->ptrace & PT_TRACE_EXEC)
+			ptrace_notify ((PTRACE_EVENT_EXEC << 8) | SIGTRAP);
+		else
 			send_sig(SIGTRAP, current, 0);
+	}
 	return 0;
 }
 

fs/binfmt_elf.c

@@ -793,8 +793,12 @@ static int load_elf_binary(struct linux_binprm * bprm, struct pt_regs * regs)
 #endif
 
 	start_thread(regs, elf_entry, bprm->p);
-	if (current->ptrace & PT_PTRACED)
+	if (unlikely(current->ptrace & PT_PTRACED)) {
+		if (current->ptrace & PT_TRACE_EXEC)
+			ptrace_notify ((PTRACE_EVENT_EXEC << 8) | SIGTRAP);
+		else
 			send_sig(SIGTRAP, current, 0);
+	}
 	retval = 0;
 out:
 	return retval;

include/asm-arm/ptrace.h

@@ -6,10 +6,7 @@
 #define PTRACE_GETFPREGS	14
 #define PTRACE_SETFPREGS	15
 
-#define PTRACE_SETOPTIONS	21
-
-/* options set using PTRACE_SETOPTIONS */
-#define PTRACE_O_TRACESYSGOOD	0x00000001
+#define PTRACE_OLDSETOPTIONS	21
 
 #include <asm/proc/ptrace.h>
 

include/asm-i386/ptrace.h

@@ -49,10 +49,7 @@ struct pt_regs {
 #define PTRACE_GETFPXREGS         18
 #define PTRACE_SETFPXREGS         19
 
-#define PTRACE_SETOPTIONS         21
-
-/* options set using PTRACE_SETOPTIONS */
-#define PTRACE_O_TRACESYSGOOD     0x00000001
+#define PTRACE_OLDSETOPTIONS         21
 
 #ifdef __KERNEL__
 #define user_mode(regs) ((VM_MASK & (regs)->eflags) || (3 & (regs)->xcs))

include/asm-ia64/ptrace.h

@@ -287,9 +287,6 @@ struct pt_all_user_regs {
 #define PTRACE_GETREGS		18	/* get all registers (pt_all_user_regs) in one shot */
 #define PTRACE_SETREGS		19	/* set all registers (pt_all_user_regs) in one shot */
 
-#define PTRACE_SETOPTIONS	21
-
-/* options set using PTRACE_SETOPTIONS */
-#define PTRACE_O_TRACESYSGOOD	0x00000001
+#define PTRACE_OLDSETOPTIONS	21
 
 #endif /* _ASM_IA64_PTRACE_H */

include/asm-mips/ptrace.h

@@ -59,10 +59,7 @@ struct pt_regs {
 /* #define PTRACE_GETFPXREGS		18 */
 /* #define PTRACE_SETFPXREGS		19 */
 
-#define PTRACE_SETOPTIONS	21
-
-/* options set using PTRACE_SETOPTIONS */
-#define PTRACE_O_TRACESYSGOOD	0x00000001
+#define PTRACE_OLDSETOPTIONS	21
 
 #ifdef _LANGUAGE_ASSEMBLY
 #include <asm/offset.h>

include/asm-mips64/ptrace.h

@@ -64,10 +64,7 @@ struct pt_regs {
 /* #define PTRACE_GETFPXREGS		18 */
 /* #define PTRACE_SETFPXREGS		19 */
 
-#define PTRACE_SETOPTIONS	21
-
-/* options set using PTRACE_SETOPTIONS */
-#define PTRACE_O_TRACESYSGOOD	0x00000001
+#define PTRACE_OLDSETOPTIONS	21
 
 #ifdef _LANGUAGE_ASSEMBLY
 #include <asm/offset.h>

include/asm-s390/ptrace.h

@@ -105,10 +105,7 @@
 
 #define STACK_FRAME_OVERHEAD	96	/* size of minimum stack frame */
 
-#define PTRACE_SETOPTIONS         21
-
-/* options set using PTRACE_SETOPTIONS */
-#define PTRACE_O_TRACESYSGOOD     0x00000001
+#define PTRACE_OLDSETOPTIONS         21
 
 #ifndef __ASSEMBLY__
 #include <linux/config.h>

include/asm-s390x/ptrace.h

@@ -85,10 +85,7 @@
 
 #define STACK_FRAME_OVERHEAD    160      /* size of minimum stack frame */
 
-#define PTRACE_SETOPTIONS         21
-
-/* options set using PTRACE_SETOPTIONS */
-#define PTRACE_O_TRACESYSGOOD     0x00000001
+#define PTRACE_OLDSETOPTIONS         21
 
 #ifndef __ASSEMBLY__
 #include <linux/config.h>

include/asm-sh/ptrace.h

@@ -44,10 +44,7 @@
 #define REG_XDREG14	47
 #define REG_FPSCR	48
 
-#define PTRACE_SETOPTIONS         21
-
-/* options set using PTRACE_SETOPTIONS */
-#define PTRACE_O_TRACESYSGOOD     0x00000001
+#define PTRACE_OLDSETOPTIONS         21
 
 /*
  * This struct defines the way the registers are stored on the

include/asm-x86_64/ptrace.h

@@ -32,10 +32,7 @@
 /* top of stack page */ 
 #define FRAME_SIZE 168
 
-#define PTRACE_SETOPTIONS         21
-
-/* options set using PTRACE_SETOPTIONS */
-#define PTRACE_O_TRACESYSGOOD     0x00000001
+#define PTRACE_OLDSETOPTIONS         21
 
 /* Dummy values for ptrace */ 
 #define FS 1000 

include/linux/ptrace.h

@@ -23,6 +23,23 @@
 
 #define PTRACE_SYSCALL		  24
 
+/* 0x4200-0x4300 are reserved for architecture-independent additions.  */
+#define PTRACE_SETOPTIONS	0x4200
+#define PTRACE_GETEVENTMSG	0x4201
+
+/* options set using PTRACE_SETOPTIONS */
+#define PTRACE_O_TRACESYSGOOD	0x00000001
+#define PTRACE_O_TRACEFORK	0x00000002
+#define PTRACE_O_TRACEVFORK	0x00000004
+#define PTRACE_O_TRACECLONE	0x00000008
+#define PTRACE_O_TRACEEXEC	0x00000010
+
+/* Wait extended result codes for the above trace options.  */
+#define PTRACE_EVENT_FORK	1
+#define PTRACE_EVENT_VFORK	2
+#define PTRACE_EVENT_CLONE	3
+#define PTRACE_EVENT_EXEC	4
+
 #include <asm/ptrace.h>
 #include <linux/sched.h>
 
@@ -32,6 +49,8 @@ extern int ptrace_attach(struct task_struct *tsk);
 extern int ptrace_detach(struct task_struct *, unsigned int);
 extern void ptrace_disable(struct task_struct *);
 extern int ptrace_check_attach(struct task_struct *task, int kill);
+extern int ptrace_request(struct task_struct *child, long request, long addr, long data);
+extern void ptrace_notify(int exit_code);
 extern void __ptrace_link(struct task_struct *child,
 				struct task_struct *new_parent);
 extern void __ptrace_unlink(struct task_struct *child);

include/linux/sched.h

@@ -51,6 +51,7 @@ struct exec_domain;
 #define CLONE_SETTID	0x00100000	/* write the TID back to userspace */
 #define CLONE_CLEARTID	0x00200000	/* clear the userspace TID */
 #define CLONE_DETACHED	0x00400000	/* parent wants no child-exit signal */
+#define CLONE_UNTRACED  0x00800000	/* set if the tracing process can't force CLONE_PTRACE on this clone */
 
 /*
  * List of flags we want to share for kernel threads,
@@ -389,6 +390,8 @@ struct task_struct {
 	void *journal_info;
 	struct dentry *proc_dentry;
 	struct backing_dev_info *backing_dev_info;
+
+	unsigned long ptrace_message;
 };
 
 extern void __put_task_struct(struct task_struct *tsk);
@@ -427,6 +430,10 @@ do { if (atomic_dec_and_test(&(tsk)->usage)) __put_task_struct(tsk); } while(0)
 #define PT_DTRACE	0x00000002	/* delayed trace (used on m68k, i386) */
 #define PT_TRACESYSGOOD	0x00000004
 #define PT_PTRACE_CAP	0x00000008	/* ptracer can follow suid-exec */
+#define PT_TRACE_FORK	0x00000010
+#define PT_TRACE_VFORK	0x00000020
+#define PT_TRACE_CLONE	0x00000040
+#define PT_TRACE_EXEC	0x00000080
 
 /*
  * Limit the stack by to some sane default: root can always

kernel/fork.c

@@ -946,6 +946,22 @@ static struct task_struct *copy_process(unsigned long clone_flags,
 	goto fork_out;
 }
 
+static inline int fork_traceflag (unsigned clone_flags)
+{
+	if (clone_flags & (CLONE_UNTRACED | CLONE_IDLETASK))
+		return 0;
+	else if (clone_flags & CLONE_VFORK) {
+		if (current->ptrace & PT_TRACE_VFORK)
+			return PTRACE_EVENT_VFORK;
+	} else if ((clone_flags & CSIGNAL) != SIGCHLD) {
+		if (current->ptrace & PT_TRACE_CLONE)
+			return PTRACE_EVENT_CLONE;
+	} else if (current->ptrace & PT_TRACE_FORK)
+		return PTRACE_EVENT_FORK;
+
+	return 0;
+}
+
 /*
  *  Ok, this is the main fork-routine.
  *
@@ -959,6 +975,13 @@ struct task_struct *do_fork(unsigned long clone_flags,
 			    int *user_tid)
 {
 	struct task_struct *p;
+	int trace = 0;
+
+	if (unlikely(current->ptrace)) {
+		trace = fork_traceflag (clone_flags);
+		if (trace)
+			clone_flags |= CLONE_PTRACE;
+	}
 
 	p = copy_process(clone_flags, stack_start, regs, stack_size, user_tid);
 	if (!IS_ERR(p)) {
@@ -974,6 +997,12 @@ struct task_struct *do_fork(unsigned long clone_flags,
 
 		wake_up_forked_process(p);		/* do this last */
 		++total_forks;
+
+		if (unlikely (trace)) {
+			current->ptrace_message = (unsigned long) p->pid;
+			ptrace_notify ((trace << 8) | SIGTRAP);
+		}
+
 		if (clone_flags & CLONE_VFORK)
 			wait_for_completion(&vfork);
 		else

kernel/ptrace.c

@@ -248,3 +248,72 @@ int ptrace_writedata(struct task_struct *tsk, char * src, unsigned long dst, int
 	}
 	return copied;
 }
+
+static int ptrace_setoptions(struct task_struct *child, long data)
+{
+	if (data & PTRACE_O_TRACESYSGOOD)
+		child->ptrace |= PT_TRACESYSGOOD;
+	else
+		child->ptrace &= ~PT_TRACESYSGOOD;
+
+	if (data & PTRACE_O_TRACEFORK)
+		child->ptrace |= PT_TRACE_FORK;
+	else
+		child->ptrace &= ~PT_TRACE_FORK;
+
+	if (data & PTRACE_O_TRACEVFORK)
+		child->ptrace |= PT_TRACE_VFORK;
+	else
+		child->ptrace &= ~PT_TRACE_VFORK;
+
+	if (data & PTRACE_O_TRACECLONE)
+		child->ptrace |= PT_TRACE_CLONE;
+	else
+		child->ptrace &= ~PT_TRACE_CLONE;
+
+	if (data & PTRACE_O_TRACEEXEC)
+		child->ptrace |= PT_TRACE_EXEC;
+	else
+		child->ptrace &= ~PT_TRACE_EXEC;
+
+	if ((data & (PTRACE_O_TRACESYSGOOD | PTRACE_O_TRACEFORK
+		    | PTRACE_O_TRACEVFORK | PTRACE_O_TRACECLONE
+		    | PTRACE_O_TRACEEXEC))
+	    != data)
+		return -EINVAL;
+
+	return 0;
+}
+
+int ptrace_request(struct task_struct *child, long request,
+		   long addr, long data)
+{
+	int ret = -EIO;
+
+	switch (request) {
+#ifdef PTRACE_OLDSETOPTIONS
+	case PTRACE_OLDSETOPTIONS:
+#endif
+	case PTRACE_SETOPTIONS:
+		ret = ptrace_setoptions(child, data);
+		break;
+	case PTRACE_GETEVENTMSG:
+		ret = put_user(child->ptrace_message, (unsigned long *) data);
+		break;
+	default:
+		break;
+	}
+
+	return ret;
+}
+
+void ptrace_notify(int exit_code)
+{
+	BUG_ON (!(current->ptrace & PT_PTRACED));
+
+	/* Let the debugger run.  */
+	current->exit_code = exit_code;
+	set_current_state(TASK_STOPPED);
+	notify_parent(current, SIGCHLD);
+	schedule();
+}