ptrace: use ptrace_request() in the remaining architectures

Use ptrace_request() in the three remaining architectures that didn't use it
(m68knommu, h8300, microblaze).  This means:

 - ptrace_request now handles PTRACE_{PEEK,POKE}{TEXT,DATA} and PTRACE_DETATCH
   calls that were previously called directly, or in case of h8300 even open
   coded.
 - adds new support for PTRACE_SETOPTIONS/PTRACE_GETEVENTMSG/
   PTRACE_GETSIGINFO/PTRACE_SETSIGINFO

Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Michal Simek <monstr@monstr.eu>
Acked-by: Greg Ungerer <gerg@uclinux.org>
Acked-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

arch/h8300/kernel/ptrace.c

@@ -42,14 +42,6 @@ extern void h8300_enable_trace(struct task_struct *child);
  * in exit.c or in signal.c.
  */
 
-inline
-static int read_long(struct task_struct * tsk, unsigned long addr,
-	unsigned long * result)
-{
-	*result = *(unsigned long *)addr;
-	return 0;
-}
-
 void ptrace_disable(struct task_struct *child)
 {
 	h8300_disable_trace(child);
@@ -60,17 +52,6 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 	int ret;
 
 	switch (request) {
-		case PTRACE_PEEKTEXT: /* read word at location addr. */ 
-		case PTRACE_PEEKDATA: {
-			unsigned long tmp;
-
-			ret = read_long(child, addr, &tmp);
-			if (ret < 0)
-				break ;
-			ret = put_user(tmp, (unsigned long *) data);
-			break ;
-		}
-
 	/* read the word at location addr in the USER area. */
 		case PTRACE_PEEKUSR: {
 			unsigned long tmp = 0;
@@ -109,11 +90,6 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 		}
 
       /* when I and D space are separate, this will have to be fixed. */
-		case PTRACE_POKETEXT: /* write the word at location addr. */
-		case PTRACE_POKEDATA:
-			ret = generic_ptrace_pokedata(child, addr, data);
-			break;
-
 		case PTRACE_POKEUSR: /* write the word at location addr in the USER area */
 			if ((addr & 3) || addr < 0 || addr >= sizeof(struct user)) {
 				ret = -EIO;
@@ -175,10 +151,6 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 			break;
 		}
 
-		case PTRACE_DETACH:	/* detach a process that was attached. */
-			ret = ptrace_detach(child, data);
-			break;
-
 		case PTRACE_GETREGS: { /* Get all gp regs from the child. */
 		  	int i;
 			unsigned long tmp;
@@ -210,7 +182,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 		}
 
 		default:
-			ret = -EIO;
+			ret = ptrace_request(child, request, addr, data);
 			break;
 	}
 	return ret;

arch/m68knommu/kernel/ptrace.c

@@ -116,12 +116,6 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 	int ret;
 
 	switch (request) {
-		/* when I and D space are separate, these will need to be fixed. */
-		case PTRACE_PEEKTEXT: /* read word at location addr. */ 
-		case PTRACE_PEEKDATA:
-			ret = generic_ptrace_peekdata(child, addr, data);
-			break;
-
 		/* read the word at location addr in the USER area. */
 		case PTRACE_PEEKUSR: {
 			unsigned long tmp;
@@ -160,12 +154,6 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 			break;
 		}
 
-		/* when I and D space are separate, this will have to be fixed. */
-		case PTRACE_POKETEXT: /* write the word at location addr. */
-		case PTRACE_POKEDATA:
-			ret = generic_ptrace_pokedata(child, addr, data);
-			break;
-
 		case PTRACE_POKEUSR: /* write the word at location addr in the USER area */
 			ret = -EIO;
 			if ((addr & 3) || addr < 0 ||
@@ -258,10 +246,6 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 			break;
 		}
 
-		case PTRACE_DETACH:	/* detach a process that was attached. */
-			ret = ptrace_detach(child, data);
-			break;
-
 		case PTRACE_GETREGS: { /* Get all gp regs from the child. */
 		  	int i;
 			unsigned long tmp;
@@ -325,7 +309,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 		break;
 
 		default:
-			ret = -EIO;
+			ret = ptrace_request(child, request, addr, data);
 			break;
 	}
 	return ret;

arch/microblaze/kernel/ptrace.c

@@ -78,26 +78,6 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 	unsigned long copied;
 
 	switch (request) {
-	case PTRACE_PEEKTEXT: /* read word at location addr. */
-	case PTRACE_PEEKDATA:
-		pr_debug("PEEKTEXT/PEEKDATA at %08lX\n", addr);
-		copied = access_process_vm(child, addr, &val, sizeof(val), 0);
-		rval = -EIO;
-		if (copied != sizeof(val))
-			break;
-		rval = put_user(val, (unsigned long *)data);
-		break;
-
-	case PTRACE_POKETEXT: /* write the word at location addr. */
-	case PTRACE_POKEDATA:
-		pr_debug("POKETEXT/POKEDATA to %08lX\n", addr);
-		rval = 0;
-		if (access_process_vm(child, addr, &data, sizeof(data), 1)
-		    == sizeof(data))
-			break;
-		rval = -EIO;
-		break;
-
 	/* Read/write the word at location ADDR in the registers. */
 	case PTRACE_PEEKUSR:
 	case PTRACE_POKEUSR:
@@ -167,13 +147,8 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 		wake_up_process(child);
 		break;
 
-	case PTRACE_DETACH: /* detach a process that was attached. */
-		pr_debug("PTRACE_DETACH\n");
-		rval = ptrace_detach(child, data);
-		break;
 	default:
-		/* rval = ptrace_request(child, request, addr, data); noMMU */
-		rval = -EIO;
+		rval = ptrace_request(child, request, addr, data);
 	}
 	return rval;
 }