Support Unicode characters in keymap dead key tables

Support for Unicode characters had been added to the keyboard code,
but there are keymaps that have accented characters accessed via dead
key combinations, and those were still restricted to 8 bit codes.

This update to kbd.c adds support for Unicode characters and
compatibility code that allows a kbdcontrol command built from kbio.h
without these patches to work on a new kernel.

Compatibility code that allows a new kbdcontrol binary running on an
old kernel to load and display the dead key map will be committed in a
separate commit.

Reviewed by:	imp, brooks
Approved by:	brooks
MFC after:	3 days
Differential Revision:	https://reviews.freebsd.org/D38381

(cherry picked from commit 4972fb9276389fb87a790b415b1161cff395884c)

12 files changed, 82 insertions, 8 deletions

diff --git a/sys/dev/adb/adb_kbd.c b/sys/dev/adb/adb_kbd.c
index d765e73ed351..69ef6271bfa2 100644
--- a/sys/dev/adb/adb_kbd.c
+++ b/sys/dev/adb/adb_kbd.c
@@ -800,6 +800,7 @@ static int akbd_ioctl(keyboard_t *kbd, u_long cmd, caddr_t data)
 	case OPIO_KEYMAP:
 	case PIO_KEYMAPENT:
 	case PIO_DEADKEYMAP:
+	case OPIO_DEADKEYMAP:
 	default:
 		return (genkbd_commonioctl(kbd, cmd, data));
 	}
diff --git a/sys/dev/atkbdc/atkbd.c b/sys/dev/atkbdc/atkbd.c
index 2e4c8e8e940f..cfaf7749a64c 100644
--- a/sys/dev/atkbdc/atkbd.c
+++ b/sys/dev/atkbdc/atkbd.c
@@ -1091,6 +1091,7 @@ atkbd_ioctl(keyboard_t *kbd, u_long cmd, caddr_t arg)
 	case OPIO_KEYMAP:	/* set keyboard translation table (compat) */
 	case PIO_KEYMAPENT:	/* set keyboard translation table entry */
 	case PIO_DEADKEYMAP:	/* set accent key translation table */
+	case OPIO_DEADKEYMAP:	/* set accent key translation table (compat) */
 		state->ks_accents = 0;
 		/* FALLTHROUGH */
 	default:
diff --git a/sys/dev/gpio/gpiokeys.c b/sys/dev/gpio/gpiokeys.c
index 652a828b63ba..56adb94ba091 100644
--- a/sys/dev/gpio/gpiokeys.c
+++ b/sys/dev/gpio/gpiokeys.c
@@ -899,6 +899,7 @@ gpiokeys_ioctl_locked(keyboard_t *kbd, u_long cmd, caddr_t arg)
 	case PIO_KEYMAPENT:		/* set keyboard translation table
 					 * entry */
 	case PIO_DEADKEYMAP:		/* set accent key translation table */
+	case OPIO_DEADKEYMAP:		/* set accent key translation table (compat) */
 		sc->sc_accents = 0;
 		/* FALLTHROUGH */
 	default:
diff --git a/sys/dev/hid/hkbd.c b/sys/dev/hid/hkbd.c
index 7515c1e426dd..b0d82299e487 100644
--- a/sys/dev/hid/hkbd.c
+++ b/sys/dev/hid/hkbd.c
@@ -1640,6 +1640,7 @@ hkbd_ioctl_locked(keyboard_t *kbd, u_long cmd, caddr_t arg)
 	case PIO_KEYMAPENT:		/* set keyboard translation table
 					 * entry */
 	case PIO_DEADKEYMAP:		/* set accent key translation table */
+	case OPIO_DEADKEYMAP:		/* set accent key translation table (compat) */
 		sc->sc_accents = 0;
 		/* FALLTHROUGH */
 	default:
diff --git a/sys/dev/hyperv/input/hv_kbd.c b/sys/dev/hyperv/input/hv_kbd.c
index 291dfe64a803..c6bf5cbbbf14 100644
--- a/sys/dev/hyperv/input/hv_kbd.c
+++ b/sys/dev/hyperv/input/hv_kbd.c
@@ -667,6 +667,7 @@ hvkbd_ioctl_locked(keyboard_t *kbd, u_long cmd, caddr_t arg)
 	case OPIO_KEYMAP:	/* set keyboard translation table (compat) */
 	case PIO_KEYMAPENT:	/* set keyboard translation table entry */
 	case PIO_DEADKEYMAP:	/* set accent key translation table */
+	case OPIO_DEADKEYMAP:	/* set accent key translation table (compat) */
 		sc->sc_accents = 0;
 		/* FALLTHROUGH */
 	default:
diff --git a/sys/dev/kbd/kbd.c b/sys/dev/kbd/kbd.c
index deb7672de7fa..41d6fd5666d8 100644
--- a/sys/dev/kbd/kbd.c
+++ b/sys/dev/kbd/kbd.c
@@ -790,6 +790,8 @@ genkbd_commonioctl(keyboard_t *kbd, u_long cmd, caddr_t arg)
 {
 	keymap_t *mapp;
 	okeymap_t *omapp;
+	accentmap_t *accentmapp;
+	oaccentmap_t *oaccentmapp;
 	keyarg_t *keyp;
 	fkeyarg_t *fkeyp;
 	int i, j;
@@ -898,16 +900,58 @@ genkbd_commonioctl(keyboard_t *kbd, u_long cmd, caddr_t arg)
 #endif
 
 	case GIO_DEADKEYMAP:	/* get accent key translation table */
-		bcopy(kbd->kb_accentmap, arg, sizeof(*kbd->kb_accentmap));
+		error = copyout(kbd->kb_accentmap, *(void **)arg,
+		    sizeof(accentmap_t));
+		return (error);
+		break;
+	case OGIO_DEADKEYMAP:	/* get accent key translation table (compat) */
+		accentmapp = kbd->kb_accentmap;
+		oaccentmapp = (oaccentmap_t *)arg;
+		oaccentmapp->n_accs = accentmapp->n_accs;
+		for (i = 0; i < NUM_DEADKEYS; i++) {
+			oaccentmapp->acc[i].accchar =
+			    accentmapp->acc[i].accchar;
+			for (j = 0; j < NUM_ACCENTCHARS; j++) {
+				oaccentmapp->acc[i].map[j][0] =
+				    accentmapp->acc[i].map[j][0];
+				oaccentmapp->acc[i].map[j][1] =
+				    accentmapp->acc[i].map[j][1];
+			}
+		}
 		break;
+
 	case PIO_DEADKEYMAP:	/* set accent key translation table */
+	case OPIO_DEADKEYMAP:	/* set accent key translation table (compat) */
 #ifndef KBD_DISABLE_KEYMAP_LOAD
-		error = accent_change_ok(kbd->kb_accentmap,
-		    (accentmap_t *)arg, curthread);
+		accentmapp = malloc(sizeof(*accentmapp), M_TEMP, M_WAITOK);
+		if (cmd == OPIO_DEADKEYMAP) {
+			oaccentmapp = (oaccentmap_t *)arg;
+			accentmapp->n_accs = oaccentmapp->n_accs;
+			for (i = 0; i < NUM_DEADKEYS; i++) {
+				for (j = 0; j < NUM_ACCENTCHARS; j++) {
+					accentmapp->acc[i].map[j][0] =
+					    oaccentmapp->acc[i].map[j][0];
+					accentmapp->acc[i].map[j][1] =
+					    oaccentmapp->acc[i].map[j][1];
+					accentmapp->acc[i].accchar =
+					    oaccentmapp->acc[i].accchar;
+				}
+			}
+		} else {
+			error = copyin(*(void **)arg, accentmapp, sizeof(*accentmapp));
+			if (error != 0) {
+				free(accentmapp, M_TEMP);
+				return (error);
+			}
+		}
+
+		error = accent_change_ok(kbd->kb_accentmap, accentmapp, curthread);
 		if (error != 0) {
+			free(accentmapp, M_TEMP);
 			return (error);
 		}
-		bcopy(arg, kbd->kb_accentmap, sizeof(*kbd->kb_accentmap));
+		bcopy(accentmapp, kbd->kb_accentmap, sizeof(*kbd->kb_accentmap));
+		free(accentmapp, M_TEMP);
 		break;
 #else
 		return (ENODEV);
diff --git a/sys/dev/kbdmux/kbdmux.c b/sys/dev/kbdmux/kbdmux.c
index b70e956830e5..1545022bec2a 100644
--- a/sys/dev/kbdmux/kbdmux.c
+++ b/sys/dev/kbdmux/kbdmux.c
@@ -1243,6 +1243,7 @@ kbdmux_ioctl(keyboard_t *kbd, u_long cmd, caddr_t arg)
 	case OPIO_KEYMAP:	/* set keyboard translation table (compat) */
 	case PIO_KEYMAPENT:	/* set keyboard translation table entry */
 	case PIO_DEADKEYMAP:	/* set accent key translation table */
+	case OPIO_DEADKEYMAP:	/* set accent key translation table (compat) */
 		KBDMUX_LOCK(state);
                 state->ks_accents = 0;
 
diff --git a/sys/dev/syscons/syscons.c b/sys/dev/syscons/syscons.c
index 6c349668410d..c456be43d8a4 100644
--- a/sys/dev/syscons/syscons.c
+++ b/sys/dev/syscons/syscons.c
@@ -1598,6 +1598,8 @@ sctty_ioctl(struct tty *tp, u_long cmd, caddr_t data, struct thread *td)
 	case OPIO_KEYMAP: /* set keyboard translation table (compat) */
 	case GIO_DEADKEYMAP: /* get accent key translation table */
 	case PIO_DEADKEYMAP: /* set accent key translation table */
+	case OGIO_DEADKEYMAP: /* get accent key translation table (compat) */
+	case OPIO_DEADKEYMAP: /* set accent key translation table (compat) */
 	case GETFKEY: /* get function key string */
 	case SETFKEY: /* set function key string */
 		error = kbdd_ioctl(sc->kbd, cmd, data);
diff --git a/sys/dev/usb/input/ukbd.c b/sys/dev/usb/input/ukbd.c
index 48bac46ab088..ab42f0ea1283 100644
--- a/sys/dev/usb/input/ukbd.c
+++ b/sys/dev/usb/input/ukbd.c
@@ -1862,6 +1862,7 @@ ukbd_ioctl_locked(keyboard_t *kbd, u_long cmd, caddr_t arg)
 	case PIO_KEYMAPENT:		/* set keyboard translation table
 					 * entry */
 	case PIO_DEADKEYMAP:		/* set accent key translation table */
+	case OPIO_DEADKEYMAP:		/* set accent key translation table (compat) */
 		sc->sc_accents = 0;
 		/* FALLTHROUGH */
 	default:
diff --git a/sys/dev/vkbd/vkbd.c b/sys/dev/vkbd/vkbd.c
index fdd244ec2525..27cf4549f3db 100644
--- a/sys/dev/vkbd/vkbd.c
+++ b/sys/dev/vkbd/vkbd.c
@@ -1207,6 +1207,7 @@ vkbd_ioctl(keyboard_t *kbd, u_long cmd, caddr_t arg)
 	case OPIO_KEYMAP:	/* set keyboard translation table (compat) */
 	case PIO_KEYMAPENT:	/* set keyboard translation table entry */
 	case PIO_DEADKEYMAP:	/* set accent key translation table */
+	case OPIO_DEADKEYMAP:	/* set accent key translation table (compat) */
 		state->ks_accents = 0;
 		/* FALLTHROUGH */
 
diff --git a/sys/dev/vt/vt_core.c b/sys/dev/vt/vt_core.c
index c5347db94c86..e148fa4f8d7d 100644
--- a/sys/dev/vt/vt_core.c
+++ b/sys/dev/vt/vt_core.c
@@ -2403,7 +2403,9 @@ skip_thunk:
 	case GIO_KEYMAP:
 	case PIO_KEYMAP:
 	case GIO_DEADKEYMAP:
+	case OGIO_DEADKEYMAP:
 	case PIO_DEADKEYMAP:
+	case OPIO_DEADKEYMAP:
 	case GETFKEY:
 	case SETFKEY:
 	case KDGKBINFO:
diff --git a/sys/sys/kbio.h b/sys/sys/kbio.h
index 7f17bda76c51..daef8e474816 100644
--- a/sys/sys/kbio.h
+++ b/sys/sys/kbio.h
@@ -199,8 +199,8 @@ typedef struct okeymap okeymap_t;
 #define ACC(x)		((x)+F_ACC)
 
 struct acc_t {
-	u_char		accchar;
-	u_char		map[NUM_ACCENTCHARS][2];
+	u_int		accchar;
+	u_int		map[NUM_ACCENTCHARS][2];
 };
 
 struct accentmap {
@@ -209,6 +209,19 @@ struct accentmap {
 };
 typedef struct accentmap accentmap_t;
 
+#ifdef _KERNEL
+struct oacc_t {
+	u_char		accchar;
+	u_char		map[NUM_ACCENTCHARS][2];
+};
+
+struct oaccentmap {
+	u_short		n_accs;
+	struct oacc_t	acc[NUM_DEADKEYS];
+};
+typedef struct oaccentmap oaccentmap_t;
+#endif /* _KERNEL */
+
 struct keyarg {
 	u_short		keynum;
 	struct keyent_t	key;
@@ -241,8 +254,13 @@ typedef struct fkeyarg	fkeyarg_t;
 #define OGIO_KEYMAP 	_IOR('k', 6, okeymap_t)
 #define OPIO_KEYMAP 	_IOW('k', 7, okeymap_t)
 #endif /* _KERNEL */
-#define GIO_DEADKEYMAP 	_IOR('k', 8, accentmap_t)
-#define PIO_DEADKEYMAP 	_IOW('k', 9, accentmap_t)
+/* XXX: Should have accentmap_t as an argument, but that's too big for ioctl()! */
+#define GIO_DEADKEYMAP 	 _IO('k', 8)
+#define PIO_DEADKEYMAP 	 _IO('k', 9)
+#ifdef _KERNEL
+#define OGIO_DEADKEYMAP	_IOR('k', 8, oaccentmap_t)
+#define OPIO_DEADKEYMAP	_IOW('k', 9, oaccentmap_t)
+#endif /* _KERNEL */
 #define GIO_KEYMAPENT 	_IOWR('k', 10, keyarg_t)
 #define PIO_KEYMAPENT 	_IOW('k', 11, keyarg_t)