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path: root/drivers/tty/vt/vt.c
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Diffstat (limited to 'drivers/tty/vt/vt.c')
-rw-r--r--drivers/tty/vt/vt.c2534
1 files changed, 1361 insertions, 1173 deletions
diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index 981d2bfcf9a5..59b4b5e126ba 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -104,7 +104,6 @@
#include <linux/uaccess.h>
#include <linux/kdb.h>
#include <linux/ctype.h>
-#include <linux/bsearch.h>
#include <linux/gcd.h>
#define MAX_NR_CON_DRIVER 16
@@ -135,19 +134,18 @@ const struct consw *conswitchp;
#define DEFAULT_CURSOR_BLINK_MS 200
struct vc vc_cons [MAX_NR_CONSOLES];
+EXPORT_SYMBOL(vc_cons);
-#ifndef VT_SINGLE_DRIVER
static const struct consw *con_driver_map[MAX_NR_CONSOLES];
-#endif
static int con_open(struct tty_struct *, struct file *);
-static void vc_init(struct vc_data *vc, unsigned int rows,
- unsigned int cols, int do_clear);
+static void vc_init(struct vc_data *vc, int do_clear);
static void gotoxy(struct vc_data *vc, int new_x, int new_y);
+static void restore_cur(struct vc_data *vc);
static void save_cur(struct vc_data *vc);
static void reset_terminal(struct vc_data *vc, int do_clear);
static void con_flush_chars(struct tty_struct *tty);
-static int set_vesa_blanking(char __user *p);
+static int set_vesa_blanking(u8 __user *mode);
static void set_cursor(struct vc_data *vc);
static void hide_cursor(struct vc_data *vc);
static void console_callback(struct work_struct *ignored);
@@ -162,6 +160,7 @@ int default_utf8 = true;
module_param(default_utf8, int, S_IRUGO | S_IWUSR);
int global_cursor_default = -1;
module_param(global_cursor_default, int, S_IRUGO | S_IWUSR);
+EXPORT_SYMBOL(global_cursor_default);
static int cur_default = CUR_UNDERLINE;
module_param(cur_default, int, S_IRUGO | S_IWUSR);
@@ -174,8 +173,9 @@ static int ignore_poke;
int do_poke_blanked_console;
int console_blanked;
+EXPORT_SYMBOL(console_blanked);
-static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
+static enum vesa_blank_mode vesa_blank_mode;
static int vesa_off_interval;
static int blankinterval;
core_param(consoleblank, blankinterval, int, 0444);
@@ -190,8 +190,10 @@ static DECLARE_WORK(con_driver_unregister_work, con_driver_unregister_callback);
* saved_* variants are for save/restore around kernel debugger enter/leave
*/
int fg_console;
+EXPORT_SYMBOL(fg_console);
int last_console;
int want_console = -1;
+
static int saved_fg_console;
static int saved_last_console;
static int saved_want_console;
@@ -223,6 +225,7 @@ static int scrollback_delta;
* the console on our behalf.
*/
int (*console_blank_hook)(int);
+EXPORT_SYMBOL(console_blank_hook);
static DEFINE_TIMER(console_timer, blank_screen_t);
static int blank_state;
@@ -283,18 +286,20 @@ static inline bool con_should_update(const struct vc_data *vc)
return con_is_visible(vc) && !console_blanked;
}
-static inline unsigned short *screenpos(const struct vc_data *vc, int offset,
- bool viewed)
+static inline u16 *screenpos(const struct vc_data *vc, unsigned int offset,
+ bool viewed)
{
- unsigned short *p;
-
- if (!viewed)
- p = (unsigned short *)(vc->vc_origin + offset);
- else if (!vc->vc_sw->con_screen_pos)
- p = (unsigned short *)(vc->vc_visible_origin + offset);
+ unsigned long origin = viewed ? vc->vc_visible_origin : vc->vc_origin;
+
+ return (u16 *)(origin + offset);
+}
+
+static void con_putc(struct vc_data *vc, u16 ca, unsigned int y, unsigned int x)
+{
+ if (vc->vc_sw->con_putc)
+ vc->vc_sw->con_putc(vc, ca, y, x);
else
- p = vc->vc_sw->con_screen_pos(vc, offset);
- return p;
+ vc->vc_sw->con_putcs(vc, &ca, 1, y, x);
}
/* Called from the keyboard irq path.. */
@@ -316,73 +321,55 @@ void schedule_console_callback(void)
* Code to manage unicode-based screen buffers
*/
-#ifdef NO_VC_UNI_SCREEN
-/* this disables and optimizes related code away at compile time */
-#define get_vc_uniscr(vc) NULL
-#else
-#define get_vc_uniscr(vc) vc->vc_uni_screen
-#endif
-
-#define VC_UNI_SCREEN_DEBUG 0
-
-typedef uint32_t char32_t;
-
/*
* Our screen buffer is preceded by an array of line pointers so that
* scrolling only implies some pointer shuffling.
*/
-struct uni_screen {
- char32_t *lines[0];
-};
-static struct uni_screen *vc_uniscr_alloc(unsigned int cols, unsigned int rows)
+static u32 **vc_uniscr_alloc(unsigned int cols, unsigned int rows)
{
- struct uni_screen *uniscr;
+ u32 **uni_lines;
void *p;
- unsigned int memsize, i;
+ unsigned int memsize, i, col_size = cols * sizeof(**uni_lines);
/* allocate everything in one go */
- memsize = cols * rows * sizeof(char32_t);
- memsize += rows * sizeof(char32_t *);
- p = vzalloc(memsize);
- if (!p)
+ memsize = col_size * rows;
+ memsize += rows * sizeof(*uni_lines);
+ uni_lines = vzalloc(memsize);
+ if (!uni_lines)
return NULL;
/* initial line pointers */
- uniscr = p;
- p = uniscr->lines + rows;
+ p = uni_lines + rows;
for (i = 0; i < rows; i++) {
- uniscr->lines[i] = p;
- p += cols * sizeof(char32_t);
+ uni_lines[i] = p;
+ p += col_size;
}
- return uniscr;
+
+ return uni_lines;
}
-static void vc_uniscr_free(struct uni_screen *uniscr)
+static void vc_uniscr_free(u32 **uni_lines)
{
- vfree(uniscr);
+ vfree(uni_lines);
}
-static void vc_uniscr_set(struct vc_data *vc, struct uni_screen *new_uniscr)
+static void vc_uniscr_set(struct vc_data *vc, u32 **new_uni_lines)
{
- vc_uniscr_free(vc->vc_uni_screen);
- vc->vc_uni_screen = new_uniscr;
+ vc_uniscr_free(vc->vc_uni_lines);
+ vc->vc_uni_lines = new_uni_lines;
}
-static void vc_uniscr_putc(struct vc_data *vc, char32_t uc)
+static void vc_uniscr_putc(struct vc_data *vc, u32 uc)
{
- struct uni_screen *uniscr = get_vc_uniscr(vc);
-
- if (uniscr)
- uniscr->lines[vc->state.y][vc->state.x] = uc;
+ if (vc->vc_uni_lines)
+ vc->vc_uni_lines[vc->state.y][vc->state.x] = uc;
}
static void vc_uniscr_insert(struct vc_data *vc, unsigned int nr)
{
- struct uni_screen *uniscr = get_vc_uniscr(vc);
-
- if (uniscr) {
- char32_t *ln = uniscr->lines[vc->state.y];
+ if (vc->vc_uni_lines) {
+ u32 *ln = vc->vc_uni_lines[vc->state.y];
unsigned int x = vc->state.x, cols = vc->vc_cols;
memmove(&ln[x + nr], &ln[x], (cols - x - nr) * sizeof(*ln));
@@ -392,13 +379,11 @@ static void vc_uniscr_insert(struct vc_data *vc, unsigned int nr)
static void vc_uniscr_delete(struct vc_data *vc, unsigned int nr)
{
- struct uni_screen *uniscr = get_vc_uniscr(vc);
-
- if (uniscr) {
- char32_t *ln = uniscr->lines[vc->state.y];
+ if (vc->vc_uni_lines) {
+ u32 *ln = vc->vc_uni_lines[vc->state.y];
unsigned int x = vc->state.x, cols = vc->vc_cols;
- memcpy(&ln[x], &ln[x + nr], (cols - x - nr) * sizeof(*ln));
+ memmove(&ln[x], &ln[x + nr], (cols - x - nr) * sizeof(*ln));
memset32(&ln[cols - nr], ' ', nr);
}
}
@@ -406,86 +391,93 @@ static void vc_uniscr_delete(struct vc_data *vc, unsigned int nr)
static void vc_uniscr_clear_line(struct vc_data *vc, unsigned int x,
unsigned int nr)
{
- struct uni_screen *uniscr = get_vc_uniscr(vc);
-
- if (uniscr) {
- char32_t *ln = uniscr->lines[vc->state.y];
-
- memset32(&ln[x], ' ', nr);
- }
+ if (vc->vc_uni_lines)
+ memset32(&vc->vc_uni_lines[vc->state.y][x], ' ', nr);
}
static void vc_uniscr_clear_lines(struct vc_data *vc, unsigned int y,
unsigned int nr)
{
- struct uni_screen *uniscr = get_vc_uniscr(vc);
+ if (vc->vc_uni_lines)
+ while (nr--)
+ memset32(vc->vc_uni_lines[y++], ' ', vc->vc_cols);
+}
- if (uniscr) {
- unsigned int cols = vc->vc_cols;
+/* juggling array rotation algorithm (complexity O(N), size complexity O(1)) */
+static void juggle_array(u32 **array, unsigned int size, unsigned int nr)
+{
+ unsigned int gcd_idx;
- while (nr--)
- memset32(uniscr->lines[y++], ' ', cols);
+ for (gcd_idx = 0; gcd_idx < gcd(nr, size); gcd_idx++) {
+ u32 *gcd_idx_val = array[gcd_idx];
+ unsigned int dst_idx = gcd_idx;
+
+ while (1) {
+ unsigned int src_idx = (dst_idx + nr) % size;
+ if (src_idx == gcd_idx)
+ break;
+
+ array[dst_idx] = array[src_idx];
+ dst_idx = src_idx;
+ }
+
+ array[dst_idx] = gcd_idx_val;
}
}
-static void vc_uniscr_scroll(struct vc_data *vc, unsigned int t, unsigned int b,
- enum con_scroll dir, unsigned int nr)
+static void vc_uniscr_scroll(struct vc_data *vc, unsigned int top,
+ unsigned int bottom, enum con_scroll dir,
+ unsigned int nr)
{
- struct uni_screen *uniscr = get_vc_uniscr(vc);
+ u32 **uni_lines = vc->vc_uni_lines;
+ unsigned int size = bottom - top;
- if (uniscr) {
- unsigned int i, j, k, sz, d, clear;
+ if (!uni_lines)
+ return;
- sz = b - t;
- clear = b - nr;
- d = nr;
- if (dir == SM_DOWN) {
- clear = t;
- d = sz - nr;
- }
- for (i = 0; i < gcd(d, sz); i++) {
- char32_t *tmp = uniscr->lines[t + i];
- j = i;
- while (1) {
- k = j + d;
- if (k >= sz)
- k -= sz;
- if (k == i)
- break;
- uniscr->lines[t + j] = uniscr->lines[t + k];
- j = k;
- }
- uniscr->lines[t + j] = tmp;
- }
- vc_uniscr_clear_lines(vc, clear, nr);
+ if (dir == SM_DOWN) {
+ juggle_array(&uni_lines[top], size, size - nr);
+ vc_uniscr_clear_lines(vc, top, nr);
+ } else {
+ juggle_array(&uni_lines[top], size, nr);
+ vc_uniscr_clear_lines(vc, bottom - nr, nr);
}
}
-static void vc_uniscr_copy_area(struct uni_screen *dst,
+static u32 vc_uniscr_getc(struct vc_data *vc, int relative_pos)
+{
+ int pos = vc->state.x + vc->vc_need_wrap + relative_pos;
+
+ if (vc->vc_uni_lines && in_range(pos, 0, vc->vc_cols))
+ return vc->vc_uni_lines[vc->state.y][pos];
+ return 0;
+}
+
+static void vc_uniscr_copy_area(u32 **dst_lines,
unsigned int dst_cols,
unsigned int dst_rows,
- struct uni_screen *src,
+ u32 **src_lines,
unsigned int src_cols,
unsigned int src_top_row,
unsigned int src_bot_row)
{
unsigned int dst_row = 0;
- if (!dst)
+ if (!dst_lines)
return;
while (src_top_row < src_bot_row) {
- char32_t *src_line = src->lines[src_top_row];
- char32_t *dst_line = dst->lines[dst_row];
+ u32 *src_line = src_lines[src_top_row];
+ u32 *dst_line = dst_lines[dst_row];
- memcpy(dst_line, src_line, src_cols * sizeof(char32_t));
+ memcpy(dst_line, src_line, src_cols * sizeof(*src_line));
if (dst_cols - src_cols)
memset32(dst_line + src_cols, ' ', dst_cols - src_cols);
src_top_row++;
dst_row++;
}
while (dst_row < dst_rows) {
- char32_t *dst_line = dst->lines[dst_row];
+ u32 *dst_line = dst_lines[dst_row];
memset32(dst_line, ' ', dst_cols);
dst_row++;
@@ -500,23 +492,20 @@ static void vc_uniscr_copy_area(struct uni_screen *dst,
*/
int vc_uniscr_check(struct vc_data *vc)
{
- struct uni_screen *uniscr;
+ u32 **uni_lines;
unsigned short *p;
int x, y, mask;
- if (__is_defined(NO_VC_UNI_SCREEN))
- return -EOPNOTSUPP;
-
WARN_CONSOLE_UNLOCKED();
if (!vc->vc_utf)
return -ENODATA;
- if (vc->vc_uni_screen)
+ if (vc->vc_uni_lines)
return 0;
- uniscr = vc_uniscr_alloc(vc->vc_cols, vc->vc_rows);
- if (!uniscr)
+ uni_lines = vc_uniscr_alloc(vc->vc_cols, vc->vc_rows);
+ if (!uni_lines)
return -ENOMEM;
/*
@@ -528,14 +517,15 @@ int vc_uniscr_check(struct vc_data *vc)
p = (unsigned short *)vc->vc_origin;
mask = vc->vc_hi_font_mask | 0xff;
for (y = 0; y < vc->vc_rows; y++) {
- char32_t *line = uniscr->lines[y];
+ u32 *line = uni_lines[y];
for (x = 0; x < vc->vc_cols; x++) {
u16 glyph = scr_readw(p++) & mask;
line[x] = inverse_translate(vc, glyph, true);
}
}
- vc->vc_uni_screen = uniscr;
+ vc->vc_uni_lines = uni_lines;
+
return 0;
}
@@ -547,11 +537,12 @@ int vc_uniscr_check(struct vc_data *vc)
void vc_uniscr_copy_line(const struct vc_data *vc, void *dest, bool viewed,
unsigned int row, unsigned int col, unsigned int nr)
{
- struct uni_screen *uniscr = get_vc_uniscr(vc);
+ u32 **uni_lines = vc->vc_uni_lines;
int offset = row * vc->vc_size_row + col * 2;
unsigned long pos;
- BUG_ON(!uniscr);
+ if (WARN_ON_ONCE(!uni_lines))
+ return;
pos = (unsigned long)screenpos(vc, offset, viewed);
if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
@@ -562,7 +553,7 @@ void vc_uniscr_copy_line(const struct vc_data *vc, void *dest, bool viewed,
*/
row = (pos - vc->vc_origin) / vc->vc_size_row;
col = ((pos - vc->vc_origin) % vc->vc_size_row) / 2;
- memcpy(dest, &uniscr->lines[row][col], nr * sizeof(char32_t));
+ memcpy(dest, &uni_lines[row][col], nr * sizeof(u32));
} else {
/*
* Scrollback is active. For now let's simply backtranslate
@@ -572,7 +563,7 @@ void vc_uniscr_copy_line(const struct vc_data *vc, void *dest, bool viewed,
*/
u16 *p = (u16 *)pos;
int mask = vc->vc_hi_font_mask | 0xff;
- char32_t *uni_buf = dest;
+ u32 *uni_buf = dest;
while (nr--) {
u16 glyph = scr_readw(p++) & mask;
*uni_buf++ = inverse_translate(vc, glyph, true);
@@ -580,82 +571,43 @@ void vc_uniscr_copy_line(const struct vc_data *vc, void *dest, bool viewed,
}
}
-/* this is for validation and debugging only */
-static void vc_uniscr_debug_check(struct vc_data *vc)
+static void con_scroll(struct vc_data *vc, unsigned int top,
+ unsigned int bottom, enum con_scroll dir,
+ unsigned int nr)
{
- struct uni_screen *uniscr = get_vc_uniscr(vc);
- unsigned short *p;
- int x, y, mask;
+ unsigned int rows = bottom - top;
+ u16 *clear, *dst, *src;
- if (!VC_UNI_SCREEN_DEBUG || !uniscr)
+ if (top + nr >= bottom)
+ nr = rows - 1;
+ if (bottom > vc->vc_rows || top >= bottom || nr < 1)
return;
- WARN_CONSOLE_UNLOCKED();
-
- /*
- * Make sure our unicode screen translates into the same glyphs
- * as the actual screen. This is brutal indeed.
- */
- p = (unsigned short *)vc->vc_origin;
- mask = vc->vc_hi_font_mask | 0xff;
- for (y = 0; y < vc->vc_rows; y++) {
- char32_t *line = uniscr->lines[y];
- for (x = 0; x < vc->vc_cols; x++) {
- u16 glyph = scr_readw(p++) & mask;
- char32_t uc = line[x];
- int tc = conv_uni_to_pc(vc, uc);
- if (tc == -4)
- tc = conv_uni_to_pc(vc, 0xfffd);
- if (tc == -4)
- tc = conv_uni_to_pc(vc, '?');
- if (tc != glyph)
- pr_err_ratelimited(
- "%s: mismatch at %d,%d: glyph=%#x tc=%#x\n",
- __func__, x, y, glyph, tc);
- }
- }
-}
-
-
-static void con_scroll(struct vc_data *vc, unsigned int t, unsigned int b,
- enum con_scroll dir, unsigned int nr)
-{
- u16 *clear, *d, *s;
-
- if (t + nr >= b)
- nr = b - t - 1;
- if (b > vc->vc_rows || t >= b || nr < 1)
- return;
- vc_uniscr_scroll(vc, t, b, dir, nr);
- if (con_is_visible(vc) && vc->vc_sw->con_scroll(vc, t, b, dir, nr))
+ vc_uniscr_scroll(vc, top, bottom, dir, nr);
+ if (con_is_visible(vc) &&
+ vc->vc_sw->con_scroll(vc, top, bottom, dir, nr))
return;
- s = clear = (u16 *)(vc->vc_origin + vc->vc_size_row * t);
- d = (u16 *)(vc->vc_origin + vc->vc_size_row * (t + nr));
+ src = clear = (u16 *)(vc->vc_origin + vc->vc_size_row * top);
+ dst = (u16 *)(vc->vc_origin + vc->vc_size_row * (top + nr));
if (dir == SM_UP) {
- clear = s + (b - t - nr) * vc->vc_cols;
- swap(s, d);
+ clear = src + (rows - nr) * vc->vc_cols;
+ swap(src, dst);
}
- scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row);
+ scr_memmovew(dst, src, (rows - nr) * vc->vc_size_row);
scr_memsetw(clear, vc->vc_video_erase_char, vc->vc_size_row * nr);
}
static void do_update_region(struct vc_data *vc, unsigned long start, int count)
{
unsigned int xx, yy, offset;
- u16 *p;
+ u16 *p = (u16 *)start;
+
+ offset = (start - vc->vc_origin) / 2;
+ xx = offset % vc->vc_cols;
+ yy = offset / vc->vc_cols;
- p = (u16 *) start;
- if (!vc->vc_sw->con_getxy) {
- offset = (start - vc->vc_origin) / 2;
- xx = offset % vc->vc_cols;
- yy = offset / vc->vc_cols;
- } else {
- int nxx, nyy;
- start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy);
- xx = nxx; yy = nyy;
- }
for(;;) {
u16 attrib = scr_readw(p) & 0xff00;
int startx = xx;
@@ -678,10 +630,6 @@ static void do_update_region(struct vc_data *vc, unsigned long start, int count)
break;
xx = 0;
yy++;
- if (vc->vc_sw->con_getxy) {
- p = (u16 *)start;
- start = vc->vc_sw->con_getxy(vc, start, NULL, NULL);
- }
}
}
@@ -695,6 +643,7 @@ void update_region(struct vc_data *vc, unsigned long start, int count)
set_cursor(vc);
}
}
+EXPORT_SYMBOL(update_region);
/* Structure of attributes is hardware-dependent */
@@ -755,7 +704,7 @@ static void update_attr(struct vc_data *vc)
/* Note: inverting the screen twice should revert to the original state */
void invert_screen(struct vc_data *vc, int offset, int count, bool viewed)
{
- unsigned short *p;
+ u16 *p;
WARN_CONSOLE_UNLOCKED();
@@ -814,7 +763,7 @@ void complement_pos(struct vc_data *vc, int offset)
old_offset < vc->vc_screenbuf_size) {
scr_writew(old, screenpos(vc, old_offset, true));
if (con_should_update(vc))
- vc->vc_sw->con_putc(vc, old, oldy, oldx);
+ con_putc(vc, old, oldy, oldx);
notify_update(vc);
}
@@ -823,15 +772,14 @@ void complement_pos(struct vc_data *vc, int offset)
if (offset != -1 && offset >= 0 &&
offset < vc->vc_screenbuf_size) {
unsigned short new;
- unsigned short *p;
- p = screenpos(vc, offset, true);
+ u16 *p = screenpos(vc, offset, true);
old = scr_readw(p);
new = old ^ vc->vc_complement_mask;
scr_writew(new, p);
if (con_should_update(vc)) {
oldx = (offset >> 1) % vc->vc_cols;
oldy = (offset >> 1) / vc->vc_cols;
- vc->vc_sw->con_putc(vc, new, oldy, oldx);
+ con_putc(vc, new, oldy, oldx);
}
notify_update(vc);
}
@@ -885,7 +833,7 @@ static void add_softcursor(struct vc_data *vc)
i ^= CUR_FG;
scr_writew(i, (u16 *)vc->vc_pos);
if (con_should_update(vc))
- vc->vc_sw->con_putc(vc, i, vc->state.y, vc->state.x);
+ con_putc(vc, i, vc->state.y, vc->state.x);
}
static void hide_softcursor(struct vc_data *vc)
@@ -893,8 +841,8 @@ static void hide_softcursor(struct vc_data *vc)
if (softcursor_original != -1) {
scr_writew(softcursor_original, (u16 *)vc->vc_pos);
if (con_should_update(vc))
- vc->vc_sw->con_putc(vc, softcursor_original,
- vc->state.y, vc->state.x);
+ con_putc(vc, softcursor_original, vc->state.y,
+ vc->state.x);
softcursor_original = -1;
}
}
@@ -904,7 +852,7 @@ static void hide_cursor(struct vc_data *vc)
if (vc_is_sel(vc))
clear_selection();
- vc->vc_sw->con_cursor(vc, CM_ERASE);
+ vc->vc_sw->con_cursor(vc, false);
hide_softcursor(vc);
}
@@ -917,7 +865,7 @@ static void set_cursor(struct vc_data *vc)
clear_selection();
add_softcursor(vc);
if (CUR_SIZE(vc->vc_cursor_type) != CUR_NONE)
- vc->vc_sw->con_cursor(vc, CM_DRAW);
+ vc->vc_sw->con_cursor(vc, true);
} else
hide_cursor(vc);
}
@@ -949,21 +897,18 @@ static void flush_scrollback(struct vc_data *vc)
WARN_CONSOLE_UNLOCKED();
set_origin(vc);
- if (vc->vc_sw->con_flush_scrollback) {
- vc->vc_sw->con_flush_scrollback(vc);
- } else if (con_is_visible(vc)) {
- /*
- * When no con_flush_scrollback method is provided then the
- * legacy way for flushing the scrollback buffer is to use
- * a side effect of the con_switch method. We do it only on
- * the foreground console as background consoles have no
- * scrollback buffers in that case and we obviously don't
- * want to switch to them.
- */
- hide_cursor(vc);
- vc->vc_sw->con_switch(vc);
- set_cursor(vc);
- }
+ if (!con_is_visible(vc))
+ return;
+
+ /*
+ * The legacy way for flushing the scrollback buffer is to use a side
+ * effect of the con_switch method. We do it only on the foreground
+ * console as background consoles have no scrollback buffers in that
+ * case and we obviously don't want to switch to them.
+ */
+ hide_cursor(vc);
+ vc->vc_sw->con_switch(vc);
+ set_cursor(vc);
}
/*
@@ -1014,7 +959,7 @@ void redraw_screen(struct vc_data *vc, int is_switch)
}
if (redraw) {
- int update;
+ bool update;
int old_was_color = vc->vc_can_do_color;
set_origin(vc);
@@ -1040,6 +985,7 @@ void redraw_screen(struct vc_data *vc, int is_switch)
notify_update(vc);
}
}
+EXPORT_SYMBOL(redraw_screen);
/*
* Allocation, freeing and resizing of VTs.
@@ -1050,16 +996,16 @@ int vc_cons_allocated(unsigned int i)
return (i < MAX_NR_CONSOLES && vc_cons[i].d);
}
-static void visual_init(struct vc_data *vc, int num, int init)
+static void visual_init(struct vc_data *vc, int num, bool init)
{
/* ++Geert: vc->vc_sw->con_init determines console size */
if (vc->vc_sw)
module_put(vc->vc_sw->owner);
vc->vc_sw = conswitchp;
-#ifndef VT_SINGLE_DRIVER
+
if (con_driver_map[num])
vc->vc_sw = con_driver_map[num];
-#endif
+
__module_get(vc->vc_sw->owner);
vc->vc_num = num;
vc->vc_display_fg = &master_display_fg;
@@ -1134,7 +1080,7 @@ int vc_allocate(unsigned int currcons) /* return 0 on success */
vc->port.ops = &vc_port_ops;
INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
- visual_init(vc, currcons, 1);
+ visual_init(vc, currcons, true);
if (!*vc->uni_pagedict_loc)
con_set_default_unimap(vc);
@@ -1153,7 +1099,7 @@ int vc_allocate(unsigned int currcons) /* return 0 on success */
if (global_cursor_default == -1)
global_cursor_default = 1;
- vc_init(vc, vc->vc_rows, vc->vc_cols, 1);
+ vc_init(vc, 1);
vcs_make_sysfs(currcons);
atomic_notifier_call_chain(&vt_notifier_list, VT_ALLOCATE, &param);
@@ -1166,51 +1112,44 @@ err_free:
}
static inline int resize_screen(struct vc_data *vc, int width, int height,
- int user)
+ bool from_user)
{
/* Resizes the resolution of the display adapater */
int err = 0;
if (vc->vc_sw->con_resize)
- err = vc->vc_sw->con_resize(vc, width, height, user);
+ err = vc->vc_sw->con_resize(vc, width, height, from_user);
return err;
}
/**
- * vc_do_resize - resizing method for the tty
- * @tty: tty being resized
- * @vc: virtual console private data
- * @cols: columns
- * @lines: lines
+ * vc_do_resize - resizing method for the tty
+ * @tty: tty being resized
+ * @vc: virtual console private data
+ * @cols: columns
+ * @lines: lines
+ * @from_user: invoked by a user?
*
- * Resize a virtual console, clipping according to the actual constraints.
- * If the caller passes a tty structure then update the termios winsize
- * information and perform any necessary signal handling.
+ * Resize a virtual console, clipping according to the actual constraints. If
+ * the caller passes a tty structure then update the termios winsize
+ * information and perform any necessary signal handling.
*
- * Caller must hold the console semaphore. Takes the termios rwsem and
- * ctrl.lock of the tty IFF a tty is passed.
+ * Locking: Caller must hold the console semaphore. Takes the termios rwsem and
+ * ctrl.lock of the tty IFF a tty is passed.
*/
-
static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc,
- unsigned int cols, unsigned int lines)
+ unsigned int cols, unsigned int lines, bool from_user)
{
unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0;
unsigned long end;
unsigned int old_rows, old_row_size, first_copied_row;
unsigned int new_cols, new_rows, new_row_size, new_screen_size;
- unsigned int user;
unsigned short *oldscreen, *newscreen;
- struct uni_screen *new_uniscr = NULL;
+ u32 **new_uniscr = NULL;
WARN_CONSOLE_UNLOCKED();
- if (!vc)
- return -ENXIO;
-
- user = vc->vc_resize_user;
- vc->vc_resize_user = 0;
-
if (cols > VC_MAXCOL || lines > VC_MAXROW)
return -EINVAL;
@@ -1236,7 +1175,7 @@ static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc,
* to deal with possible errors from the code below, we call
* the resize_screen here as well.
*/
- return resize_screen(vc, new_cols, new_rows, user);
+ return resize_screen(vc, new_cols, new_rows, from_user);
}
if (new_screen_size > KMALLOC_MAX_SIZE || !new_screen_size)
@@ -1245,7 +1184,7 @@ static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc,
if (!newscreen)
return -ENOMEM;
- if (get_vc_uniscr(vc)) {
+ if (vc->vc_uni_lines) {
new_uniscr = vc_uniscr_alloc(new_cols, new_rows);
if (!new_uniscr) {
kfree(newscreen);
@@ -1259,7 +1198,7 @@ static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc,
old_rows = vc->vc_rows;
old_row_size = vc->vc_size_row;
- err = resize_screen(vc, new_cols, new_rows, user);
+ err = resize_screen(vc, new_cols, new_rows, from_user);
if (err) {
kfree(newscreen);
vc_uniscr_free(new_uniscr);
@@ -1297,7 +1236,7 @@ static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc,
end = old_origin + old_row_size * min(old_rows, new_rows);
vc_uniscr_copy_area(new_uniscr, new_cols, new_rows,
- get_vc_uniscr(vc), rlth/2, first_copied_row,
+ vc->vc_uni_lines, rlth/2, first_copied_row,
min(old_rows, new_rows));
vc_uniscr_set(vc, new_uniscr);
@@ -1346,43 +1285,42 @@ static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc,
}
/**
- * vc_resize - resize a VT
- * @vc: virtual console
- * @cols: columns
- * @rows: rows
+ * __vc_resize - resize a VT
+ * @vc: virtual console
+ * @cols: columns
+ * @rows: rows
+ * @from_user: invoked by a user?
+ *
+ * Resize a virtual console as seen from the console end of things. We use the
+ * common vc_do_resize() method to update the structures.
*
- * Resize a virtual console as seen from the console end of things. We
- * use the common vc_do_resize methods to update the structures. The
- * caller must hold the console sem to protect console internals and
- * vc->port.tty
+ * Locking: The caller must hold the console sem to protect console internals
+ * and @vc->port.tty.
*/
-
-int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int rows)
+int __vc_resize(struct vc_data *vc, unsigned int cols, unsigned int rows,
+ bool from_user)
{
- return vc_do_resize(vc->port.tty, vc, cols, rows);
+ return vc_do_resize(vc->port.tty, vc, cols, rows, from_user);
}
+EXPORT_SYMBOL(__vc_resize);
/**
- * vt_resize - resize a VT
- * @tty: tty to resize
- * @ws: winsize attributes
+ * vt_resize - resize a VT
+ * @tty: tty to resize
+ * @ws: winsize attributes
*
- * Resize a virtual terminal. This is called by the tty layer as we
- * register our own handler for resizing. The mutual helper does all
- * the actual work.
+ * Resize a virtual terminal. This is called by the tty layer as we register
+ * our own handler for resizing. The mutual helper does all the actual work.
*
- * Takes the console sem and the called methods then take the tty
- * termios_rwsem and the tty ctrl.lock in that order.
+ * Locking: Takes the console sem and the called methods then take the tty
+ * termios_rwsem and the tty ctrl.lock in that order.
*/
static int vt_resize(struct tty_struct *tty, struct winsize *ws)
{
struct vc_data *vc = tty->driver_data;
- int ret;
- console_lock();
- ret = vc_do_resize(tty, vc, ws->ws_col, ws->ws_row);
- console_unlock();
- return ret;
+ guard(console_lock)();
+ return vc_do_resize(tty, vc, ws->ws_col, ws->ws_row, false);
}
struct vc_data *vc_deallocate(unsigned int currcons)
@@ -1403,6 +1341,10 @@ struct vc_data *vc_deallocate(unsigned int currcons)
vc_uniscr_set(vc, NULL);
kfree(vc->vc_screenbuf);
vc_cons[currcons].d = NULL;
+ if (vc->vc_saved_screen != NULL) {
+ kfree(vc->vc_saved_screen);
+ vc->vc_saved_screen = NULL;
+ }
}
return vc;
}
@@ -1424,6 +1366,7 @@ enum { EPecma = 0, EPdec, EPeq, EPgt, EPlt};
const unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7,
8,12,10,14, 9,13,11,15 };
+EXPORT_SYMBOL(color_table);
/* the default colour table, for VGA+ colour systems */
unsigned char default_red[] = {
@@ -1431,18 +1374,21 @@ unsigned char default_red[] = {
0x55, 0xff, 0x55, 0xff, 0x55, 0xff, 0x55, 0xff
};
module_param_array(default_red, byte, NULL, S_IRUGO | S_IWUSR);
+EXPORT_SYMBOL(default_red);
unsigned char default_grn[] = {
0x00, 0x00, 0xaa, 0x55, 0x00, 0x00, 0xaa, 0xaa,
0x55, 0x55, 0xff, 0xff, 0x55, 0x55, 0xff, 0xff
};
module_param_array(default_grn, byte, NULL, S_IRUGO | S_IWUSR);
+EXPORT_SYMBOL(default_grn);
unsigned char default_blu[] = {
0x00, 0x00, 0x00, 0x00, 0xaa, 0xaa, 0xaa, 0xaa,
0x55, 0x55, 0x55, 0x55, 0xff, 0xff, 0xff, 0xff
};
module_param_array(default_blu, byte, NULL, S_IRUGO | S_IWUSR);
+EXPORT_SYMBOL(default_blu);
/*
* gotoxy() must verify all boundaries, because the arguments
@@ -1549,36 +1495,43 @@ static inline void del(struct vc_data *vc)
/* ignored */
}
-static void csi_J(struct vc_data *vc, int vpar)
+enum CSI_J {
+ CSI_J_CURSOR_TO_END = 0,
+ CSI_J_START_TO_CURSOR = 1,
+ CSI_J_VISIBLE = 2,
+ CSI_J_FULL = 3,
+};
+
+static void csi_J(struct vc_data *vc, enum CSI_J vpar)
{
+ unsigned short *start;
unsigned int count;
- unsigned short * start;
switch (vpar) {
- case 0: /* erase from cursor to end of display */
- vc_uniscr_clear_line(vc, vc->state.x,
- vc->vc_cols - vc->state.x);
- vc_uniscr_clear_lines(vc, vc->state.y + 1,
- vc->vc_rows - vc->state.y - 1);
- count = (vc->vc_scr_end - vc->vc_pos) >> 1;
- start = (unsigned short *)vc->vc_pos;
- break;
- case 1: /* erase from start to cursor */
- vc_uniscr_clear_line(vc, 0, vc->state.x + 1);
- vc_uniscr_clear_lines(vc, 0, vc->state.y);
- count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1;
- start = (unsigned short *)vc->vc_origin;
- break;
- case 3: /* include scrollback */
- flush_scrollback(vc);
- fallthrough;
- case 2: /* erase whole display */
- vc_uniscr_clear_lines(vc, 0, vc->vc_rows);
- count = vc->vc_cols * vc->vc_rows;
- start = (unsigned short *)vc->vc_origin;
- break;
- default:
- return;
+ case CSI_J_CURSOR_TO_END:
+ vc_uniscr_clear_line(vc, vc->state.x,
+ vc->vc_cols - vc->state.x);
+ vc_uniscr_clear_lines(vc, vc->state.y + 1,
+ vc->vc_rows - vc->state.y - 1);
+ count = (vc->vc_scr_end - vc->vc_pos) >> 1;
+ start = (unsigned short *)vc->vc_pos;
+ break;
+ case CSI_J_START_TO_CURSOR:
+ vc_uniscr_clear_line(vc, 0, vc->state.x + 1);
+ vc_uniscr_clear_lines(vc, 0, vc->state.y);
+ count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1;
+ start = (unsigned short *)vc->vc_origin;
+ break;
+ case CSI_J_FULL:
+ flush_scrollback(vc);
+ fallthrough;
+ case CSI_J_VISIBLE:
+ vc_uniscr_clear_lines(vc, 0, vc->vc_rows);
+ count = vc->vc_cols * vc->vc_rows;
+ start = (unsigned short *)vc->vc_origin;
+ break;
+ default:
+ return;
}
scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
if (con_should_update(vc))
@@ -1586,27 +1539,33 @@ static void csi_J(struct vc_data *vc, int vpar)
vc->vc_need_wrap = 0;
}
-static void csi_K(struct vc_data *vc, int vpar)
+enum {
+ CSI_K_CURSOR_TO_LINEEND = 0,
+ CSI_K_LINESTART_TO_CURSOR = 1,
+ CSI_K_LINE = 2,
+};
+
+static void csi_K(struct vc_data *vc)
{
unsigned int count;
unsigned short *start = (unsigned short *)vc->vc_pos;
int offset;
- switch (vpar) {
- case 0: /* erase from cursor to end of line */
- offset = 0;
- count = vc->vc_cols - vc->state.x;
- break;
- case 1: /* erase from start of line to cursor */
- offset = -vc->state.x;
- count = vc->state.x + 1;
- break;
- case 2: /* erase whole line */
- offset = -vc->state.x;
- count = vc->vc_cols;
- break;
- default:
- return;
+ switch (vc->vc_par[0]) {
+ case CSI_K_CURSOR_TO_LINEEND:
+ offset = 0;
+ count = vc->vc_cols - vc->state.x;
+ break;
+ case CSI_K_LINESTART_TO_CURSOR:
+ offset = -vc->state.x;
+ count = vc->state.x + 1;
+ break;
+ case CSI_K_LINE:
+ offset = -vc->state.x;
+ count = vc->vc_cols;
+ break;
+ default:
+ return;
}
vc_uniscr_clear_line(vc, vc->state.x + offset, count);
scr_memsetw(start + offset, vc->vc_video_erase_char, 2 * count);
@@ -1615,20 +1574,15 @@ static void csi_K(struct vc_data *vc, int vpar)
do_update_region(vc, (unsigned long)(start + offset), count);
}
-/* erase the following vpar positions */
-static void csi_X(struct vc_data *vc, unsigned int vpar)
+/* erase the following count positions */
+static void csi_X(struct vc_data *vc)
{ /* not vt100? */
- unsigned int count;
-
- if (!vpar)
- vpar++;
-
- count = min(vpar, vc->vc_cols - vc->state.x);
+ unsigned int count = clamp(vc->vc_par[0], 1, vc->vc_cols - vc->state.x);
vc_uniscr_clear_line(vc, vc->state.x, count);
scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count);
if (con_should_update(vc))
- vc->vc_sw->con_clear(vc, vc->state.y, vc->state.x, 1, count);
+ vc->vc_sw->con_clear(vc, vc->state.y, vc->state.x, count);
vc->vc_need_wrap = 0;
}
@@ -1644,7 +1598,7 @@ static void default_attr(struct vc_data *vc)
struct rgb { u8 r; u8 g; u8 b; };
-static void rgb_from_256(int i, struct rgb *c)
+static void rgb_from_256(unsigned int i, struct rgb *c)
{
if (i < 8) { /* Standard colours. */
c->r = i&1 ? 0xaa : 0x00;
@@ -1655,9 +1609,12 @@ static void rgb_from_256(int i, struct rgb *c)
c->g = i&2 ? 0xff : 0x55;
c->b = i&4 ? 0xff : 0x55;
} else if (i < 232) { /* 6x6x6 colour cube. */
- c->r = (i - 16) / 36 * 85 / 2;
- c->g = (i - 16) / 6 % 6 * 85 / 2;
- c->b = (i - 16) % 6 * 85 / 2;
+ i -= 16;
+ c->b = i % 6 * 255 / 6;
+ i /= 6;
+ c->g = i % 6 * 255 / 6;
+ i /= 6;
+ c->r = i * 255 / 6;
} else /* Grayscale ramp. */
c->r = c->g = c->b = i * 10 - 2312;
}
@@ -1727,6 +1684,39 @@ static int vc_t416_color(struct vc_data *vc, int i,
return i;
}
+enum {
+ CSI_m_DEFAULT = 0,
+ CSI_m_BOLD = 1,
+ CSI_m_HALF_BRIGHT = 2,
+ CSI_m_ITALIC = 3,
+ CSI_m_UNDERLINE = 4,
+ CSI_m_BLINK = 5,
+ CSI_m_REVERSE = 7,
+ CSI_m_PRI_FONT = 10,
+ CSI_m_ALT_FONT1 = 11,
+ CSI_m_ALT_FONT2 = 12,
+ CSI_m_DOUBLE_UNDERLINE = 21,
+ CSI_m_NORMAL_INTENSITY = 22,
+ CSI_m_NO_ITALIC = 23,
+ CSI_m_NO_UNDERLINE = 24,
+ CSI_m_NO_BLINK = 25,
+ CSI_m_NO_REVERSE = 27,
+ CSI_m_FG_COLOR_BEG = 30,
+ CSI_m_FG_COLOR_END = 37,
+ CSI_m_FG_COLOR = 38,
+ CSI_m_DEFAULT_FG_COLOR = 39,
+ CSI_m_BG_COLOR_BEG = 40,
+ CSI_m_BG_COLOR_END = 47,
+ CSI_m_BG_COLOR = 48,
+ CSI_m_DEFAULT_BG_COLOR = 49,
+ CSI_m_BRIGHT_FG_COLOR_BEG = 90,
+ CSI_m_BRIGHT_FG_COLOR_END = 97,
+ CSI_m_BRIGHT_FG_COLOR_OFF = CSI_m_BRIGHT_FG_COLOR_BEG - CSI_m_FG_COLOR_BEG,
+ CSI_m_BRIGHT_BG_COLOR_BEG = 100,
+ CSI_m_BRIGHT_BG_COLOR_END = 107,
+ CSI_m_BRIGHT_BG_COLOR_OFF = CSI_m_BRIGHT_BG_COLOR_BEG - CSI_m_BG_COLOR_BEG,
+};
+
/* console_lock is held */
static void csi_m(struct vc_data *vc)
{
@@ -1734,33 +1724,33 @@ static void csi_m(struct vc_data *vc)
for (i = 0; i <= vc->vc_npar; i++)
switch (vc->vc_par[i]) {
- case 0: /* all attributes off */
+ case CSI_m_DEFAULT: /* all attributes off */
default_attr(vc);
break;
- case 1:
+ case CSI_m_BOLD:
vc->state.intensity = VCI_BOLD;
break;
- case 2:
+ case CSI_m_HALF_BRIGHT:
vc->state.intensity = VCI_HALF_BRIGHT;
break;
- case 3:
+ case CSI_m_ITALIC:
vc->state.italic = true;
break;
- case 21:
+ case CSI_m_DOUBLE_UNDERLINE:
/*
* No console drivers support double underline, so
* convert it to a single underline.
*/
- case 4:
+ case CSI_m_UNDERLINE:
vc->state.underline = true;
break;
- case 5:
+ case CSI_m_BLINK:
vc->state.blink = true;
break;
- case 7:
+ case CSI_m_REVERSE:
vc->state.reverse = true;
break;
- case 10: /* ANSI X3.64-1979 (SCO-ish?)
+ case CSI_m_PRI_FONT: /* ANSI X3.64-1979 (SCO-ish?)
* Select primary font, don't display control chars if
* defined, don't set bit 8 on output.
*/
@@ -1768,7 +1758,7 @@ static void csi_m(struct vc_data *vc)
vc->vc_disp_ctrl = 0;
vc->vc_toggle_meta = 0;
break;
- case 11: /* ANSI X3.64-1979 (SCO-ish?)
+ case CSI_m_ALT_FONT1: /* ANSI X3.64-1979 (SCO-ish?)
* Select first alternate font, lets chars < 32 be
* displayed as ROM chars.
*/
@@ -1776,7 +1766,7 @@ static void csi_m(struct vc_data *vc)
vc->vc_disp_ctrl = 1;
vc->vc_toggle_meta = 0;
break;
- case 12: /* ANSI X3.64-1979 (SCO-ish?)
+ case CSI_m_ALT_FONT2: /* ANSI X3.64-1979 (SCO-ish?)
* Select second alternate font, toggle high bit
* before displaying as ROM char.
*/
@@ -1784,47 +1774,51 @@ static void csi_m(struct vc_data *vc)
vc->vc_disp_ctrl = 1;
vc->vc_toggle_meta = 1;
break;
- case 22:
+ case CSI_m_NORMAL_INTENSITY:
vc->state.intensity = VCI_NORMAL;
break;
- case 23:
+ case CSI_m_NO_ITALIC:
vc->state.italic = false;
break;
- case 24:
+ case CSI_m_NO_UNDERLINE:
vc->state.underline = false;
break;
- case 25:
+ case CSI_m_NO_BLINK:
vc->state.blink = false;
break;
- case 27:
+ case CSI_m_NO_REVERSE:
vc->state.reverse = false;
break;
- case 38:
+ case CSI_m_FG_COLOR:
i = vc_t416_color(vc, i, rgb_foreground);
break;
- case 48:
+ case CSI_m_BG_COLOR:
i = vc_t416_color(vc, i, rgb_background);
break;
- case 39:
+ case CSI_m_DEFAULT_FG_COLOR:
vc->state.color = (vc->vc_def_color & 0x0f) |
(vc->state.color & 0xf0);
break;
- case 49:
+ case CSI_m_DEFAULT_BG_COLOR:
vc->state.color = (vc->vc_def_color & 0xf0) |
(vc->state.color & 0x0f);
break;
- default:
- if (vc->vc_par[i] >= 90 && vc->vc_par[i] <= 107) {
- if (vc->vc_par[i] < 100)
- vc->state.intensity = VCI_BOLD;
- vc->vc_par[i] -= 60;
- }
- if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37)
- vc->state.color = color_table[vc->vc_par[i] - 30]
- | (vc->state.color & 0xf0);
- else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47)
- vc->state.color = (color_table[vc->vc_par[i] - 40] << 4)
- | (vc->state.color & 0x0f);
+ case CSI_m_BRIGHT_FG_COLOR_BEG ... CSI_m_BRIGHT_FG_COLOR_END:
+ vc->state.intensity = VCI_BOLD;
+ vc->vc_par[i] -= CSI_m_BRIGHT_FG_COLOR_OFF;
+ fallthrough;
+ case CSI_m_FG_COLOR_BEG ... CSI_m_FG_COLOR_END:
+ vc->vc_par[i] -= CSI_m_FG_COLOR_BEG;
+ vc->state.color = color_table[vc->vc_par[i]] |
+ (vc->state.color & 0xf0);
+ break;
+ case CSI_m_BRIGHT_BG_COLOR_BEG ... CSI_m_BRIGHT_BG_COLOR_END:
+ vc->vc_par[i] -= CSI_m_BRIGHT_BG_COLOR_OFF;
+ fallthrough;
+ case CSI_m_BG_COLOR_BEG ... CSI_m_BG_COLOR_END:
+ vc->vc_par[i] -= CSI_m_BG_COLOR_BEG;
+ vc->state.color = (color_table[vc->vc_par[i]] << 4) |
+ (vc->state.color & 0x0f);
break;
}
update_attr(vc);
@@ -1878,133 +1872,233 @@ int mouse_reporting(void)
return vc_cons[fg_console].d->vc_report_mouse;
}
+/* invoked via ioctl(TIOCLINUX) */
+static int get_bracketed_paste(struct tty_struct *tty)
+{
+ struct vc_data *vc = tty->driver_data;
+
+ return vc->vc_bracketed_paste;
+}
+
/* console_lock is held */
-static void set_mode(struct vc_data *vc, int on_off)
+static void enter_alt_screen(struct vc_data *vc)
{
- int i;
+ unsigned int size = vc->vc_rows * vc->vc_cols * 2;
+
+ if (vc->vc_saved_screen != NULL)
+ return; /* Already inside an alt-screen */
+ vc->vc_saved_screen = kmemdup((u16 *)vc->vc_origin, size, GFP_KERNEL);
+ if (vc->vc_saved_screen == NULL)
+ return;
+ vc->vc_saved_rows = vc->vc_rows;
+ vc->vc_saved_cols = vc->vc_cols;
+ save_cur(vc);
+ /* clear entire screen */
+ csi_J(vc, CSI_J_FULL);
+}
+
+/* console_lock is held */
+static void leave_alt_screen(struct vc_data *vc)
+{
+ unsigned int rows = min(vc->vc_saved_rows, vc->vc_rows);
+ unsigned int cols = min(vc->vc_saved_cols, vc->vc_cols);
+ u16 *src, *dest;
+
+ if (vc->vc_saved_screen == NULL)
+ return; /* Not inside an alt-screen */
+ for (unsigned int r = 0; r < rows; r++) {
+ src = vc->vc_saved_screen + r * vc->vc_saved_cols;
+ dest = ((u16 *)vc->vc_origin) + r * vc->vc_cols;
+ memcpy(dest, src, 2 * cols);
+ }
+ restore_cur(vc);
+ /* Update the entire screen */
+ if (con_should_update(vc))
+ do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
+ kfree(vc->vc_saved_screen);
+ vc->vc_saved_screen = NULL;
+}
+
+enum {
+ CSI_DEC_hl_CURSOR_KEYS = 1, /* CKM: cursor keys send ^[Ox/^[[x */
+ CSI_DEC_hl_132_COLUMNS = 3, /* COLM: 80/132 mode switch */
+ CSI_DEC_hl_REVERSE_VIDEO = 5, /* SCNM */
+ CSI_DEC_hl_ORIGIN_MODE = 6, /* OM: origin relative/absolute */
+ CSI_DEC_hl_AUTOWRAP = 7, /* AWM */
+ CSI_DEC_hl_AUTOREPEAT = 8, /* ARM */
+ CSI_DEC_hl_MOUSE_X10 = 9,
+ CSI_DEC_hl_SHOW_CURSOR = 25, /* TCEM */
+ CSI_DEC_hl_MOUSE_VT200 = 1000,
+ CSI_DEC_hl_ALT_SCREEN = 1049,
+ CSI_DEC_hl_BRACKETED_PASTE = 2004,
+};
+
+/* console_lock is held */
+static void csi_DEC_hl(struct vc_data *vc, bool on_off)
+{
+ unsigned int i;
for (i = 0; i <= vc->vc_npar; i++)
- if (vc->vc_priv == EPdec) {
- switch(vc->vc_par[i]) { /* DEC private modes set/reset */
- case 1: /* Cursor keys send ^[Ox/^[[x */
- if (on_off)
- set_kbd(vc, decckm);
- else
- clr_kbd(vc, decckm);
- break;
- case 3: /* 80/132 mode switch unimplemented */
+ switch (vc->vc_par[i]) {
+ case CSI_DEC_hl_CURSOR_KEYS:
+ if (on_off)
+ set_kbd(vc, decckm);
+ else
+ clr_kbd(vc, decckm);
+ break;
+ case CSI_DEC_hl_132_COLUMNS: /* unimplemented */
#if 0
- vc_resize(deccolm ? 132 : 80, vc->vc_rows);
- /* this alone does not suffice; some user mode
- utility has to change the hardware regs */
+ vc_resize(deccolm ? 132 : 80, vc->vc_rows);
+ /* this alone does not suffice; some user mode
+ utility has to change the hardware regs */
#endif
- break;
- case 5: /* Inverted screen on/off */
- if (vc->vc_decscnm != on_off) {
- vc->vc_decscnm = on_off;
- invert_screen(vc, 0,
- vc->vc_screenbuf_size,
- false);
- update_attr(vc);
- }
- break;
- case 6: /* Origin relative/absolute */
- vc->vc_decom = on_off;
- gotoxay(vc, 0, 0);
- break;
- case 7: /* Autowrap on/off */
- vc->vc_decawm = on_off;
- break;
- case 8: /* Autorepeat on/off */
- if (on_off)
- set_kbd(vc, decarm);
- else
- clr_kbd(vc, decarm);
- break;
- case 9:
- vc->vc_report_mouse = on_off ? 1 : 0;
- break;
- case 25: /* Cursor on/off */
- vc->vc_deccm = on_off;
- break;
- case 1000:
- vc->vc_report_mouse = on_off ? 2 : 0;
- break;
- }
- } else {
- switch(vc->vc_par[i]) { /* ANSI modes set/reset */
- case 3: /* Monitor (display ctrls) */
- vc->vc_disp_ctrl = on_off;
- break;
- case 4: /* Insert Mode on/off */
- vc->vc_decim = on_off;
- break;
- case 20: /* Lf, Enter == CrLf/Lf */
- if (on_off)
- set_kbd(vc, lnm);
- else
- clr_kbd(vc, lnm);
- break;
+ break;
+ case CSI_DEC_hl_REVERSE_VIDEO:
+ if (vc->vc_decscnm != on_off) {
+ vc->vc_decscnm = on_off;
+ invert_screen(vc, 0, vc->vc_screenbuf_size,
+ false);
+ update_attr(vc);
}
+ break;
+ case CSI_DEC_hl_ORIGIN_MODE:
+ vc->vc_decom = on_off;
+ gotoxay(vc, 0, 0);
+ break;
+ case CSI_DEC_hl_AUTOWRAP:
+ vc->vc_decawm = on_off;
+ break;
+ case CSI_DEC_hl_AUTOREPEAT:
+ if (on_off)
+ set_kbd(vc, decarm);
+ else
+ clr_kbd(vc, decarm);
+ break;
+ case CSI_DEC_hl_MOUSE_X10:
+ vc->vc_report_mouse = on_off ? 1 : 0;
+ break;
+ case CSI_DEC_hl_SHOW_CURSOR:
+ vc->vc_deccm = on_off;
+ break;
+ case CSI_DEC_hl_MOUSE_VT200:
+ vc->vc_report_mouse = on_off ? 2 : 0;
+ break;
+ case CSI_DEC_hl_BRACKETED_PASTE:
+ vc->vc_bracketed_paste = on_off;
+ break;
+ case CSI_DEC_hl_ALT_SCREEN:
+ if (on_off)
+ enter_alt_screen(vc);
+ else
+ leave_alt_screen(vc);
+ break;
}
}
+enum {
+ CSI_hl_DISPLAY_CTRL = 3, /* handle ansi control chars */
+ CSI_hl_INSERT = 4, /* IRM: insert/replace */
+ CSI_hl_AUTO_NL = 20, /* LNM: Enter == CrLf/Lf */
+};
+
/* console_lock is held */
-static void setterm_command(struct vc_data *vc)
+static void csi_hl(struct vc_data *vc, bool on_off)
+{
+ unsigned int i;
+
+ for (i = 0; i <= vc->vc_npar; i++)
+ switch (vc->vc_par[i]) { /* ANSI modes set/reset */
+ case CSI_hl_DISPLAY_CTRL:
+ vc->vc_disp_ctrl = on_off;
+ break;
+ case CSI_hl_INSERT:
+ vc->vc_decim = on_off;
+ break;
+ case CSI_hl_AUTO_NL:
+ if (on_off)
+ set_kbd(vc, lnm);
+ else
+ clr_kbd(vc, lnm);
+ break;
+ }
+}
+
+enum CSI_right_square_bracket {
+ CSI_RSB_COLOR_FOR_UNDERLINE = 1,
+ CSI_RSB_COLOR_FOR_HALF_BRIGHT = 2,
+ CSI_RSB_MAKE_CUR_COLOR_DEFAULT = 8,
+ CSI_RSB_BLANKING_INTERVAL = 9,
+ CSI_RSB_BELL_FREQUENCY = 10,
+ CSI_RSB_BELL_DURATION = 11,
+ CSI_RSB_BRING_CONSOLE_TO_FRONT = 12,
+ CSI_RSB_UNBLANK = 13,
+ CSI_RSB_VESA_OFF_INTERVAL = 14,
+ CSI_RSB_BRING_PREV_CONSOLE_TO_FRONT = 15,
+ CSI_RSB_CURSOR_BLINK_INTERVAL = 16,
+};
+
+/*
+ * csi_RSB - csi+] (Right Square Bracket) handler
+ *
+ * These are linux console private sequences.
+ *
+ * console_lock is held
+ */
+static void csi_RSB(struct vc_data *vc)
{
switch (vc->vc_par[0]) {
- case 1: /* set color for underline mode */
+ case CSI_RSB_COLOR_FOR_UNDERLINE:
if (vc->vc_can_do_color && vc->vc_par[1] < 16) {
vc->vc_ulcolor = color_table[vc->vc_par[1]];
if (vc->state.underline)
update_attr(vc);
}
break;
- case 2: /* set color for half intensity mode */
+ case CSI_RSB_COLOR_FOR_HALF_BRIGHT:
if (vc->vc_can_do_color && vc->vc_par[1] < 16) {
vc->vc_halfcolor = color_table[vc->vc_par[1]];
if (vc->state.intensity == VCI_HALF_BRIGHT)
update_attr(vc);
}
break;
- case 8: /* store colors as defaults */
+ case CSI_RSB_MAKE_CUR_COLOR_DEFAULT:
vc->vc_def_color = vc->vc_attr;
if (vc->vc_hi_font_mask == 0x100)
vc->vc_def_color >>= 1;
default_attr(vc);
update_attr(vc);
break;
- case 9: /* set blanking interval */
+ case CSI_RSB_BLANKING_INTERVAL:
blankinterval = min(vc->vc_par[1], 60U) * 60;
poke_blanked_console();
break;
- case 10: /* set bell frequency in Hz */
+ case CSI_RSB_BELL_FREQUENCY:
if (vc->vc_npar >= 1)
vc->vc_bell_pitch = vc->vc_par[1];
else
vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
break;
- case 11: /* set bell duration in msec */
+ case CSI_RSB_BELL_DURATION:
if (vc->vc_npar >= 1)
vc->vc_bell_duration = (vc->vc_par[1] < 2000) ?
msecs_to_jiffies(vc->vc_par[1]) : 0;
else
vc->vc_bell_duration = DEFAULT_BELL_DURATION;
break;
- case 12: /* bring specified console to the front */
+ case CSI_RSB_BRING_CONSOLE_TO_FRONT:
if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1))
set_console(vc->vc_par[1] - 1);
break;
- case 13: /* unblank the screen */
+ case CSI_RSB_UNBLANK:
poke_blanked_console();
break;
- case 14: /* set vesa powerdown interval */
+ case CSI_RSB_VESA_OFF_INTERVAL:
vesa_off_interval = min(vc->vc_par[1], 60U) * 60 * HZ;
break;
- case 15: /* activate the previous console */
+ case CSI_RSB_BRING_PREV_CONSOLE_TO_FRONT:
set_console(last_console);
break;
- case 16: /* set cursor blink duration in msec */
+ case CSI_RSB_CURSOR_BLINK_INTERVAL:
if (vc->vc_npar >= 1 && vc->vc_par[1] >= 50 &&
vc->vc_par[1] <= USHRT_MAX)
vc->vc_cur_blink_ms = vc->vc_par[1];
@@ -2017,41 +2111,32 @@ static void setterm_command(struct vc_data *vc)
/* console_lock is held */
static void csi_at(struct vc_data *vc, unsigned int nr)
{
- if (nr > vc->vc_cols - vc->state.x)
- nr = vc->vc_cols - vc->state.x;
- else if (!nr)
- nr = 1;
+ nr = clamp(nr, 1, vc->vc_cols - vc->state.x);
insert_char(vc, nr);
}
/* console_lock is held */
-static void csi_L(struct vc_data *vc, unsigned int nr)
+static void csi_L(struct vc_data *vc)
{
- if (nr > vc->vc_rows - vc->state.y)
- nr = vc->vc_rows - vc->state.y;
- else if (!nr)
- nr = 1;
+ unsigned int nr = clamp(vc->vc_par[0], 1, vc->vc_rows - vc->state.y);
+
con_scroll(vc, vc->state.y, vc->vc_bottom, SM_DOWN, nr);
vc->vc_need_wrap = 0;
}
/* console_lock is held */
-static void csi_P(struct vc_data *vc, unsigned int nr)
+static void csi_P(struct vc_data *vc)
{
- if (nr > vc->vc_cols - vc->state.x)
- nr = vc->vc_cols - vc->state.x;
- else if (!nr)
- nr = 1;
+ unsigned int nr = clamp(vc->vc_par[0], 1, vc->vc_cols - vc->state.x);
+
delete_char(vc, nr);
}
/* console_lock is held */
-static void csi_M(struct vc_data *vc, unsigned int nr)
+static void csi_M(struct vc_data *vc)
{
- if (nr > vc->vc_rows - vc->state.y)
- nr = vc->vc_rows - vc->state.y;
- else if (!nr)
- nr=1;
+ unsigned int nr = clamp(vc->vc_par[0], 1, vc->vc_rows - vc->state.y);
+
con_scroll(vc, vc->state.y, vc->vc_bottom, SM_UP, nr);
vc->vc_need_wrap = 0;
}
@@ -2074,9 +2159,48 @@ static void restore_cur(struct vc_data *vc)
vc->vc_need_wrap = 0;
}
-enum { ESnormal, ESesc, ESsquare, ESgetpars, ESfunckey,
- EShash, ESsetG0, ESsetG1, ESpercent, EScsiignore, ESnonstd,
- ESpalette, ESosc, ESapc, ESpm, ESdcs };
+/**
+ * enum vc_ctl_state - control characters state of a vt
+ *
+ * @ESnormal: initial state, no control characters parsed
+ * @ESesc: ESC parsed
+ * @ESsquare: CSI parsed -- modifiers/parameters/ctrl chars expected
+ * @ESgetpars: CSI parsed -- parameters/ctrl chars expected
+ * @ESfunckey: CSI [ parsed
+ * @EShash: ESC # parsed
+ * @ESsetG0: ESC ( parsed
+ * @ESsetG1: ESC ) parsed
+ * @ESpercent: ESC % parsed
+ * @EScsiignore: CSI [0x20-0x3f] parsed
+ * @ESnonstd: OSC parsed
+ * @ESpalette: OSC P parsed
+ * @ESosc: OSC [0-9] parsed
+ * @ESANSI_first: first state for ignoring ansi control sequences
+ * @ESapc: ESC _ parsed
+ * @ESpm: ESC ^ parsed
+ * @ESdcs: ESC P parsed
+ * @ESANSI_last: last state for ignoring ansi control sequences
+ */
+enum vc_ctl_state {
+ ESnormal,
+ ESesc,
+ ESsquare,
+ ESgetpars,
+ ESfunckey,
+ EShash,
+ ESsetG0,
+ ESsetG1,
+ ESpercent,
+ EScsiignore,
+ ESnonstd,
+ ESpalette,
+ ESosc,
+ ESANSI_first = ESosc,
+ ESapc,
+ ESpm,
+ ESdcs,
+ ESANSI_last = ESdcs,
+};
/* console_lock is held (except via vc_init()) */
static void reset_terminal(struct vc_data *vc, int do_clear)
@@ -2093,6 +2217,7 @@ static void reset_terminal(struct vc_data *vc, int do_clear)
vc->state.charset = 0;
vc->vc_need_wrap = 0;
vc->vc_report_mouse = 0;
+ vc->vc_bracketed_paste = 0;
vc->vc_utf = default_utf8;
vc->vc_utf_count = 0;
@@ -2105,6 +2230,13 @@ static void reset_terminal(struct vc_data *vc, int do_clear)
vc->vc_deccm = global_cursor_default;
vc->vc_decim = 0;
+ if (vc->vc_saved_screen != NULL) {
+ kfree(vc->vc_saved_screen);
+ vc->vc_saved_screen = NULL;
+ vc->vc_saved_rows = 0;
+ vc->vc_saved_cols = 0;
+ }
+
vt_reset_keyboard(vc->vc_num);
vc->vc_cursor_type = cur_default;
@@ -2124,10 +2256,10 @@ static void reset_terminal(struct vc_data *vc, int do_clear)
gotoxy(vc, 0, 0);
save_cur(vc);
if (do_clear)
- csi_J(vc, 2);
+ csi_J(vc, CSI_J_VISIBLE);
}
-static void vc_setGx(struct vc_data *vc, unsigned int which, int c)
+static void vc_setGx(struct vc_data *vc, unsigned int which, u8 c)
{
unsigned char *charset = &vc->state.Gx_charset[which];
@@ -2150,36 +2282,54 @@ static void vc_setGx(struct vc_data *vc, unsigned int which, int c)
vc->vc_translate = set_translate(*charset, vc);
}
-/* is this state an ANSI control string? */
-static bool ansi_control_string(unsigned int state)
+static bool ansi_control_string(enum vc_ctl_state state)
{
- if (state == ESosc || state == ESapc || state == ESpm || state == ESdcs)
- return true;
- return false;
+ return state >= ESANSI_first && state <= ESANSI_last;
}
-/* console_lock is held */
-static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
+enum {
+ ASCII_NULL = 0,
+ ASCII_BELL = 7,
+ ASCII_BACKSPACE = 8,
+ ASCII_IGNORE_FIRST = ASCII_BACKSPACE,
+ ASCII_HTAB = 9,
+ ASCII_LINEFEED = 10,
+ ASCII_VTAB = 11,
+ ASCII_FORMFEED = 12,
+ ASCII_CAR_RET = 13,
+ ASCII_IGNORE_LAST = ASCII_CAR_RET,
+ ASCII_SHIFTOUT = 14,
+ ASCII_SHIFTIN = 15,
+ ASCII_CANCEL = 24,
+ ASCII_SUBSTITUTE = 26,
+ ASCII_ESCAPE = 27,
+ ASCII_CSI_IGNORE_FIRST = ' ', /* 0x2x, 0x3a and 0x3c - 0x3f */
+ ASCII_CSI_IGNORE_LAST = '?',
+ ASCII_DEL = 127,
+ ASCII_EXT_CSI = 128 + ASCII_ESCAPE,
+};
+
+/*
+ * Handle ascii characters in control sequences and change states accordingly.
+ * E.g. ESC sets the state of vc to ESesc.
+ *
+ * Returns: true if @c handled.
+ */
+static bool handle_ascii(struct tty_struct *tty, struct vc_data *vc, u8 c)
{
- /*
- * Control characters can be used in the _middle_
- * of an escape sequence, aside from ANSI control strings.
- */
- if (ansi_control_string(vc->vc_state) && c >= 8 && c <= 13)
- return;
switch (c) {
- case 0:
- return;
- case 7:
+ case ASCII_NULL:
+ return true;
+ case ASCII_BELL:
if (ansi_control_string(vc->vc_state))
vc->vc_state = ESnormal;
else if (vc->vc_bell_duration)
kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration);
- return;
- case 8:
+ return true;
+ case ASCII_BACKSPACE:
bs(vc);
- return;
- case 9:
+ return true;
+ case ASCII_HTAB:
vc->vc_pos -= (vc->state.x << 1);
vc->state.x = find_next_bit(vc->vc_tab_stop,
@@ -2190,119 +2340,330 @@ static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
vc->vc_pos += (vc->state.x << 1);
notify_write(vc, '\t');
- return;
- case 10: case 11: case 12:
+ return true;
+ case ASCII_LINEFEED:
+ case ASCII_VTAB:
+ case ASCII_FORMFEED:
lf(vc);
if (!is_kbd(vc, lnm))
- return;
+ return true;
fallthrough;
- case 13:
+ case ASCII_CAR_RET:
cr(vc);
- return;
- case 14:
+ return true;
+ case ASCII_SHIFTOUT:
vc->state.charset = 1;
vc->vc_translate = set_translate(vc->state.Gx_charset[1], vc);
vc->vc_disp_ctrl = 1;
- return;
- case 15:
+ return true;
+ case ASCII_SHIFTIN:
vc->state.charset = 0;
vc->vc_translate = set_translate(vc->state.Gx_charset[0], vc);
vc->vc_disp_ctrl = 0;
- return;
- case 24: case 26:
+ return true;
+ case ASCII_CANCEL:
+ case ASCII_SUBSTITUTE:
vc->vc_state = ESnormal;
- return;
- case 27:
+ return true;
+ case ASCII_ESCAPE:
vc->vc_state = ESesc;
- return;
- case 127:
+ return true;
+ case ASCII_DEL:
del(vc);
- return;
- case 128+27:
+ return true;
+ case ASCII_EXT_CSI:
vc->vc_state = ESsquare;
- return;
+ return true;
}
- switch(vc->vc_state) {
- case ESesc:
- vc->vc_state = ESnormal;
- switch (c) {
- case '[':
- vc->vc_state = ESsquare;
- return;
- case ']':
- vc->vc_state = ESnonstd;
- return;
- case '_':
- vc->vc_state = ESapc;
- return;
- case '^':
- vc->vc_state = ESpm;
- return;
- case '%':
- vc->vc_state = ESpercent;
- return;
- case 'E':
- cr(vc);
- lf(vc);
- return;
- case 'M':
- ri(vc);
- return;
- case 'D':
- lf(vc);
- return;
- case 'H':
- if (vc->state.x < VC_TABSTOPS_COUNT)
- set_bit(vc->state.x, vc->vc_tab_stop);
- return;
- case 'P':
- vc->vc_state = ESdcs;
- return;
- case 'Z':
+
+ return false;
+}
+
+/*
+ * Handle a character (@c) following an ESC (when @vc is in the ESesc state).
+ * E.g. previous ESC with @c == '[' here yields the ESsquare state (that is:
+ * CSI).
+ */
+static void handle_esc(struct tty_struct *tty, struct vc_data *vc, u8 c)
+{
+ vc->vc_state = ESnormal;
+ switch (c) {
+ case '[':
+ vc->vc_state = ESsquare;
+ break;
+ case ']':
+ vc->vc_state = ESnonstd;
+ break;
+ case '_':
+ vc->vc_state = ESapc;
+ break;
+ case '^':
+ vc->vc_state = ESpm;
+ break;
+ case '%':
+ vc->vc_state = ESpercent;
+ break;
+ case 'E':
+ cr(vc);
+ lf(vc);
+ break;
+ case 'M':
+ ri(vc);
+ break;
+ case 'D':
+ lf(vc);
+ break;
+ case 'H':
+ if (vc->state.x < VC_TABSTOPS_COUNT)
+ set_bit(vc->state.x, vc->vc_tab_stop);
+ break;
+ case 'P':
+ vc->vc_state = ESdcs;
+ break;
+ case 'Z':
+ respond_ID(tty);
+ break;
+ case '7':
+ save_cur(vc);
+ break;
+ case '8':
+ restore_cur(vc);
+ break;
+ case '(':
+ vc->vc_state = ESsetG0;
+ break;
+ case ')':
+ vc->vc_state = ESsetG1;
+ break;
+ case '#':
+ vc->vc_state = EShash;
+ break;
+ case 'c':
+ reset_terminal(vc, 1);
+ break;
+ case '>': /* Numeric keypad */
+ clr_kbd(vc, kbdapplic);
+ break;
+ case '=': /* Appl. keypad */
+ set_kbd(vc, kbdapplic);
+ break;
+ }
+}
+
+/*
+ * Handle special DEC control sequences ("ESC [ ? parameters char"). Parameters
+ * are in @vc->vc_par and the char is in @c here.
+ */
+static void csi_DEC(struct tty_struct *tty, struct vc_data *vc, u8 c)
+{
+ switch (c) {
+ case 'h':
+ csi_DEC_hl(vc, true);
+ break;
+ case 'l':
+ csi_DEC_hl(vc, false);
+ break;
+ case 'c':
+ if (vc->vc_par[0])
+ vc->vc_cursor_type = CUR_MAKE(vc->vc_par[0],
+ vc->vc_par[1],
+ vc->vc_par[2]);
+ else
+ vc->vc_cursor_type = cur_default;
+ break;
+ case 'm':
+ clear_selection();
+ if (vc->vc_par[0])
+ vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1];
+ else
+ vc->vc_complement_mask = vc->vc_s_complement_mask;
+ break;
+ case 'n':
+ if (vc->vc_par[0] == 5)
+ status_report(tty);
+ else if (vc->vc_par[0] == 6)
+ cursor_report(vc, tty);
+ break;
+ }
+}
+
+/*
+ * Handle Control Sequence Introducer control characters. That is
+ * "ESC [ parameters char". Parameters are in @vc->vc_par and the char is in
+ * @c here.
+ */
+static void csi_ECMA(struct tty_struct *tty, struct vc_data *vc, u8 c)
+{
+ switch (c) {
+ case 'G':
+ case '`':
+ if (vc->vc_par[0])
+ vc->vc_par[0]--;
+ gotoxy(vc, vc->vc_par[0], vc->state.y);
+ break;
+ case 'A':
+ if (!vc->vc_par[0])
+ vc->vc_par[0]++;
+ gotoxy(vc, vc->state.x, vc->state.y - vc->vc_par[0]);
+ break;
+ case 'B':
+ case 'e':
+ if (!vc->vc_par[0])
+ vc->vc_par[0]++;
+ gotoxy(vc, vc->state.x, vc->state.y + vc->vc_par[0]);
+ break;
+ case 'C':
+ case 'a':
+ if (!vc->vc_par[0])
+ vc->vc_par[0]++;
+ gotoxy(vc, vc->state.x + vc->vc_par[0], vc->state.y);
+ break;
+ case 'D':
+ if (!vc->vc_par[0])
+ vc->vc_par[0]++;
+ gotoxy(vc, vc->state.x - vc->vc_par[0], vc->state.y);
+ break;
+ case 'E':
+ if (!vc->vc_par[0])
+ vc->vc_par[0]++;
+ gotoxy(vc, 0, vc->state.y + vc->vc_par[0]);
+ break;
+ case 'F':
+ if (!vc->vc_par[0])
+ vc->vc_par[0]++;
+ gotoxy(vc, 0, vc->state.y - vc->vc_par[0]);
+ break;
+ case 'd':
+ if (vc->vc_par[0])
+ vc->vc_par[0]--;
+ gotoxay(vc, vc->state.x ,vc->vc_par[0]);
+ break;
+ case 'H':
+ case 'f':
+ if (vc->vc_par[0])
+ vc->vc_par[0]--;
+ if (vc->vc_par[1])
+ vc->vc_par[1]--;
+ gotoxay(vc, vc->vc_par[1], vc->vc_par[0]);
+ break;
+ case 'J':
+ csi_J(vc, vc->vc_par[0]);
+ break;
+ case 'K':
+ csi_K(vc);
+ break;
+ case 'L':
+ csi_L(vc);
+ break;
+ case 'M':
+ csi_M(vc);
+ break;
+ case 'P':
+ csi_P(vc);
+ break;
+ case 'c':
+ if (!vc->vc_par[0])
respond_ID(tty);
- return;
- case '7':
- save_cur(vc);
- return;
- case '8':
- restore_cur(vc);
- return;
- case '(':
- vc->vc_state = ESsetG0;
- return;
- case ')':
- vc->vc_state = ESsetG1;
- return;
- case '#':
- vc->vc_state = EShash;
- return;
- case 'c':
- reset_terminal(vc, 1);
- return;
- case '>': /* Numeric keypad */
- clr_kbd(vc, kbdapplic);
- return;
- case '=': /* Appl. keypad */
- set_kbd(vc, kbdapplic);
- return;
+ break;
+ case 'g':
+ if (!vc->vc_par[0] && vc->state.x < VC_TABSTOPS_COUNT)
+ set_bit(vc->state.x, vc->vc_tab_stop);
+ else if (vc->vc_par[0] == 3)
+ bitmap_zero(vc->vc_tab_stop, VC_TABSTOPS_COUNT);
+ break;
+ case 'h':
+ csi_hl(vc, true);
+ break;
+ case 'l':
+ csi_hl(vc, false);
+ break;
+ case 'm':
+ csi_m(vc);
+ break;
+ case 'n':
+ if (vc->vc_par[0] == 5)
+ status_report(tty);
+ else if (vc->vc_par[0] == 6)
+ cursor_report(vc, tty);
+ break;
+ case 'q': /* DECLL - but only 3 leds */
+ /* map 0,1,2,3 to 0,1,2,4 */
+ if (vc->vc_par[0] < 4)
+ vt_set_led_state(vc->vc_num,
+ (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4);
+ break;
+ case 'r':
+ if (!vc->vc_par[0])
+ vc->vc_par[0]++;
+ if (!vc->vc_par[1])
+ vc->vc_par[1] = vc->vc_rows;
+ /* Minimum allowed region is 2 lines */
+ if (vc->vc_par[0] < vc->vc_par[1] &&
+ vc->vc_par[1] <= vc->vc_rows) {
+ vc->vc_top = vc->vc_par[0] - 1;
+ vc->vc_bottom = vc->vc_par[1];
+ gotoxay(vc, 0, 0);
}
+ break;
+ case 's':
+ save_cur(vc);
+ break;
+ case 'u':
+ restore_cur(vc);
+ break;
+ case 'X':
+ csi_X(vc);
+ break;
+ case '@':
+ csi_at(vc, vc->vc_par[0]);
+ break;
+ case ']':
+ csi_RSB(vc);
+ break;
+ }
+
+}
+
+static void vc_reset_params(struct vc_data *vc)
+{
+ memset(vc->vc_par, 0, sizeof(vc->vc_par));
+ vc->vc_npar = 0;
+}
+
+/* console_lock is held */
+static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, u8 c)
+{
+ /*
+ * Control characters can be used in the _middle_
+ * of an escape sequence, aside from ANSI control strings.
+ */
+ if (ansi_control_string(vc->vc_state) && c >= ASCII_IGNORE_FIRST &&
+ c <= ASCII_IGNORE_LAST)
+ return;
+
+ if (handle_ascii(tty, vc, c))
+ return;
+
+ switch(vc->vc_state) {
+ case ESesc: /* ESC */
+ handle_esc(tty, vc, c);
return;
- case ESnonstd:
- if (c=='P') { /* palette escape sequence */
- for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
- vc->vc_par[vc->vc_npar] = 0;
- vc->vc_npar = 0;
+ case ESnonstd: /* ESC ] aka OSC */
+ switch (c) {
+ case 'P': /* palette escape sequence */
+ vc_reset_params(vc);
vc->vc_state = ESpalette;
return;
- } else if (c=='R') { /* reset palette */
+ case 'R': /* reset palette */
reset_palette(vc);
- vc->vc_state = ESnormal;
- } else if (c>='0' && c<='9')
+ break;
+ case '0' ... '9':
vc->vc_state = ESosc;
- else
- vc->vc_state = ESnormal;
+ return;
+ }
+ vc->vc_state = ESnormal;
return;
- case ESpalette:
+ case ESpalette: /* ESC ] P aka OSC P */
if (isxdigit(c)) {
vc->vc_par[vc->vc_npar++] = hex_to_bin(c);
if (vc->vc_npar == 7) {
@@ -2319,16 +2680,14 @@ static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
} else
vc->vc_state = ESnormal;
return;
- case ESsquare:
- for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
- vc->vc_par[vc->vc_npar] = 0;
- vc->vc_npar = 0;
+ case ESsquare: /* ESC [ aka CSI, parameters or modifiers expected */
+ vc_reset_params(vc);
+
vc->vc_state = ESgetpars;
- if (c == '[') { /* Function key */
- vc->vc_state=ESfunckey;
- return;
- }
switch (c) {
+ case '[': /* Function key */
+ vc->vc_state = ESfunckey;
+ return;
case '?':
vc->vc_priv = EPdec;
return;
@@ -2344,182 +2703,44 @@ static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
}
vc->vc_priv = EPecma;
fallthrough;
- case ESgetpars:
- if (c == ';' && vc->vc_npar < NPAR - 1) {
- vc->vc_npar++;
- return;
- } else if (c>='0' && c<='9') {
+ case ESgetpars: /* ESC [ aka CSI, parameters expected */
+ switch (c) {
+ case ';':
+ if (vc->vc_npar < NPAR - 1) {
+ vc->vc_npar++;
+ return;
+ }
+ break;
+ case '0' ... '9':
vc->vc_par[vc->vc_npar] *= 10;
vc->vc_par[vc->vc_npar] += c - '0';
return;
}
- if (c >= 0x20 && c <= 0x3f) { /* 0x2x, 0x3a and 0x3c - 0x3f */
+ if (c >= ASCII_CSI_IGNORE_FIRST && c <= ASCII_CSI_IGNORE_LAST) {
vc->vc_state = EScsiignore;
return;
}
+
+ /* parameters done, handle the control char @c */
+
vc->vc_state = ESnormal;
- switch(c) {
- case 'h':
- if (vc->vc_priv <= EPdec)
- set_mode(vc, 1);
- return;
- case 'l':
- if (vc->vc_priv <= EPdec)
- set_mode(vc, 0);
- return;
- case 'c':
- if (vc->vc_priv == EPdec) {
- if (vc->vc_par[0])
- vc->vc_cursor_type =
- CUR_MAKE(vc->vc_par[0],
- vc->vc_par[1],
- vc->vc_par[2]);
- else
- vc->vc_cursor_type = cur_default;
- return;
- }
- break;
- case 'm':
- if (vc->vc_priv == EPdec) {
- clear_selection();
- if (vc->vc_par[0])
- vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1];
- else
- vc->vc_complement_mask = vc->vc_s_complement_mask;
- return;
- }
- break;
- case 'n':
- if (vc->vc_priv == EPecma) {
- if (vc->vc_par[0] == 5)
- status_report(tty);
- else if (vc->vc_par[0] == 6)
- cursor_report(vc, tty);
- }
- return;
- }
- if (vc->vc_priv != EPecma) {
- vc->vc_priv = EPecma;
- return;
- }
- switch(c) {
- case 'G': case '`':
- if (vc->vc_par[0])
- vc->vc_par[0]--;
- gotoxy(vc, vc->vc_par[0], vc->state.y);
- return;
- case 'A':
- if (!vc->vc_par[0])
- vc->vc_par[0]++;
- gotoxy(vc, vc->state.x, vc->state.y - vc->vc_par[0]);
- return;
- case 'B': case 'e':
- if (!vc->vc_par[0])
- vc->vc_par[0]++;
- gotoxy(vc, vc->state.x, vc->state.y + vc->vc_par[0]);
- return;
- case 'C': case 'a':
- if (!vc->vc_par[0])
- vc->vc_par[0]++;
- gotoxy(vc, vc->state.x + vc->vc_par[0], vc->state.y);
- return;
- case 'D':
- if (!vc->vc_par[0])
- vc->vc_par[0]++;
- gotoxy(vc, vc->state.x - vc->vc_par[0], vc->state.y);
- return;
- case 'E':
- if (!vc->vc_par[0])
- vc->vc_par[0]++;
- gotoxy(vc, 0, vc->state.y + vc->vc_par[0]);
- return;
- case 'F':
- if (!vc->vc_par[0])
- vc->vc_par[0]++;
- gotoxy(vc, 0, vc->state.y - vc->vc_par[0]);
- return;
- case 'd':
- if (vc->vc_par[0])
- vc->vc_par[0]--;
- gotoxay(vc, vc->state.x ,vc->vc_par[0]);
- return;
- case 'H': case 'f':
- if (vc->vc_par[0])
- vc->vc_par[0]--;
- if (vc->vc_par[1])
- vc->vc_par[1]--;
- gotoxay(vc, vc->vc_par[1], vc->vc_par[0]);
- return;
- case 'J':
- csi_J(vc, vc->vc_par[0]);
- return;
- case 'K':
- csi_K(vc, vc->vc_par[0]);
- return;
- case 'L':
- csi_L(vc, vc->vc_par[0]);
- return;
- case 'M':
- csi_M(vc, vc->vc_par[0]);
- return;
- case 'P':
- csi_P(vc, vc->vc_par[0]);
- return;
- case 'c':
- if (!vc->vc_par[0])
- respond_ID(tty);
- return;
- case 'g':
- if (!vc->vc_par[0] && vc->state.x < VC_TABSTOPS_COUNT)
- set_bit(vc->state.x, vc->vc_tab_stop);
- else if (vc->vc_par[0] == 3)
- bitmap_zero(vc->vc_tab_stop, VC_TABSTOPS_COUNT);
- return;
- case 'm':
- csi_m(vc);
- return;
- case 'q': /* DECLL - but only 3 leds */
- /* map 0,1,2,3 to 0,1,2,4 */
- if (vc->vc_par[0] < 4)
- vt_set_led_state(vc->vc_num,
- (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4);
- return;
- case 'r':
- if (!vc->vc_par[0])
- vc->vc_par[0]++;
- if (!vc->vc_par[1])
- vc->vc_par[1] = vc->vc_rows;
- /* Minimum allowed region is 2 lines */
- if (vc->vc_par[0] < vc->vc_par[1] &&
- vc->vc_par[1] <= vc->vc_rows) {
- vc->vc_top = vc->vc_par[0] - 1;
- vc->vc_bottom = vc->vc_par[1];
- gotoxay(vc, 0, 0);
- }
- return;
- case 's':
- save_cur(vc);
- return;
- case 'u':
- restore_cur(vc);
- return;
- case 'X':
- csi_X(vc, vc->vc_par[0]);
+
+ switch (vc->vc_priv) {
+ case EPdec:
+ csi_DEC(tty, vc, c);
return;
- case '@':
- csi_at(vc, vc->vc_par[0]);
+ case EPecma:
+ csi_ECMA(tty, vc, c);
return;
- case ']': /* setterm functions */
- setterm_command(vc);
+ default:
return;
}
- return;
case EScsiignore:
- if (c >= 20 && c <= 0x3f)
+ if (c >= ASCII_CSI_IGNORE_FIRST && c <= ASCII_CSI_IGNORE_LAST)
return;
vc->vc_state = ESnormal;
return;
- case ESpercent:
+ case ESpercent: /* ESC % */
vc->vc_state = ESnormal;
switch (c) {
case '@': /* defined in ISO 2022 */
@@ -2531,79 +2752,42 @@ static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
return;
}
return;
- case ESfunckey:
+ case ESfunckey: /* ESC [ [ aka CSI [ */
vc->vc_state = ESnormal;
return;
- case EShash:
+ case EShash: /* ESC # */
vc->vc_state = ESnormal;
if (c == '8') {
/* DEC screen alignment test. kludge :-) */
vc->vc_video_erase_char =
(vc->vc_video_erase_char & 0xff00) | 'E';
- csi_J(vc, 2);
+ csi_J(vc, CSI_J_VISIBLE);
vc->vc_video_erase_char =
(vc->vc_video_erase_char & 0xff00) | ' ';
do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
}
return;
- case ESsetG0:
+ case ESsetG0: /* ESC ( */
vc_setGx(vc, 0, c);
vc->vc_state = ESnormal;
return;
- case ESsetG1:
+ case ESsetG1: /* ESC ) */
vc_setGx(vc, 1, c);
vc->vc_state = ESnormal;
return;
- case ESapc:
+ case ESapc: /* ESC _ */
return;
- case ESosc:
+ case ESosc: /* ESC ] [0-9] aka OSC [0-9] */
return;
- case ESpm:
+ case ESpm: /* ESC ^ */
return;
- case ESdcs:
+ case ESdcs: /* ESC P */
return;
default:
vc->vc_state = ESnormal;
}
}
-/* is_double_width() is based on the wcwidth() implementation by
- * Markus Kuhn -- 2007-05-26 (Unicode 5.0)
- * Latest version: https://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
- */
-struct interval {
- uint32_t first;
- uint32_t last;
-};
-
-static int ucs_cmp(const void *key, const void *elt)
-{
- uint32_t ucs = *(uint32_t *)key;
- struct interval e = *(struct interval *) elt;
-
- if (ucs > e.last)
- return 1;
- else if (ucs < e.first)
- return -1;
- return 0;
-}
-
-static int is_double_width(uint32_t ucs)
-{
- static const struct interval double_width[] = {
- { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E },
- { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF },
- { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 },
- { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD }
- };
- if (ucs < double_width[0].first ||
- ucs > double_width[ARRAY_SIZE(double_width) - 1].last)
- return 0;
-
- return bsearch(&ucs, double_width, ARRAY_SIZE(double_width),
- sizeof(struct interval), ucs_cmp) != NULL;
-}
-
struct vc_draw_region {
unsigned long from, to;
int x;
@@ -2634,39 +2818,45 @@ static inline int vc_translate_ascii(const struct vc_data *vc, int c)
/**
- * vc_sanitize_unicode -- Replace invalid Unicode code points with U+FFFD
- * @c: the received character, or U+FFFD for invalid sequences.
+ * vc_sanitize_unicode - Replace invalid Unicode code points with ``U+FFFD``
+ * @c: the received code point
*/
static inline int vc_sanitize_unicode(const int c)
{
- if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff)
+ if (c >= 0xd800 && c <= 0xdfff)
return 0xfffd;
return c;
}
/**
- * vc_translate_unicode -- Combine UTF-8 into Unicode in @vc_utf_char
+ * vc_translate_unicode - Combine UTF-8 into Unicode in &vc_data.vc_utf_char
* @vc: virtual console
- * @c: character to translate
- * @rescan: we return true if we need more (continuation) data
+ * @c: UTF-8 byte to translate
+ * @rescan: set to true iff @c wasn't consumed here and needs to be re-processed
+ *
+ * * &vc_data.vc_utf_char is the being-constructed Unicode code point.
+ * * &vc_data.vc_utf_count is the number of continuation bytes still expected to
+ * arrive.
+ * * &vc_data.vc_npar is the number of continuation bytes arrived so far.
*
- * @vc_utf_char is the being-constructed unicode character.
- * @vc_utf_count is the number of continuation bytes still expected to arrive.
- * @vc_npar is the number of continuation bytes arrived so far.
+ * Return:
+ * * %-1 - Input OK so far, @c consumed, further bytes expected.
+ * * %0xFFFD - Possibility 1: input invalid, @c may have been consumed (see
+ * desc. of @rescan). Possibility 2: input OK, @c consumed,
+ * ``U+FFFD`` is the resulting code point. ``U+FFFD`` is valid,
+ * ``REPLACEMENT CHARACTER``.
+ * * otherwise - Input OK, @c consumed, resulting code point returned.
*/
static int vc_translate_unicode(struct vc_data *vc, int c, bool *rescan)
{
- static const u32 utf8_length_changes[] = {
- 0x0000007f, 0x000007ff, 0x0000ffff,
- 0x001fffff, 0x03ffffff, 0x7fffffff
- };
+ static const u32 utf8_length_changes[] = {0x7f, 0x7ff, 0xffff, 0x10ffff};
/* Continuation byte received */
if ((c & 0xc0) == 0x80) {
/* Unexpected continuation byte? */
if (!vc->vc_utf_count)
- return 0xfffd;
+ goto bad_sequence;
vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f);
vc->vc_npar++;
@@ -2678,17 +2868,17 @@ static int vc_translate_unicode(struct vc_data *vc, int c, bool *rescan)
/* Reject overlong sequences */
if (c <= utf8_length_changes[vc->vc_npar - 1] ||
c > utf8_length_changes[vc->vc_npar])
- return 0xfffd;
+ goto bad_sequence;
return vc_sanitize_unicode(c);
}
/* Single ASCII byte or first byte of a sequence received */
if (vc->vc_utf_count) {
- /* Continuation byte expected */
+ /* A continuation byte was expected */
*rescan = true;
vc->vc_utf_count = 0;
- return 0xfffd;
+ goto bad_sequence;
}
/* Nothing to do if an ASCII byte was received */
@@ -2706,19 +2896,15 @@ static int vc_translate_unicode(struct vc_data *vc, int c, bool *rescan)
} else if ((c & 0xf8) == 0xf0) {
vc->vc_utf_count = 3;
vc->vc_utf_char = (c & 0x07);
- } else if ((c & 0xfc) == 0xf8) {
- vc->vc_utf_count = 4;
- vc->vc_utf_char = (c & 0x03);
- } else if ((c & 0xfe) == 0xfc) {
- vc->vc_utf_count = 5;
- vc->vc_utf_char = (c & 0x01);
} else {
- /* 254 and 255 are invalid */
- return 0xfffd;
+ goto bad_sequence;
}
need_more_bytes:
return -1;
+
+bad_sequence:
+ return 0xfffd;
}
static int vc_translate(struct vc_data *vc, int *c, bool *rescan)
@@ -2757,9 +2943,13 @@ static bool vc_is_control(struct vc_data *vc, int tc, int c)
* as cursor movement) and should not be displayed as a glyph unless
* the disp_ctrl mode is explicitly enabled.
*/
- static const u32 CTRL_ACTION = 0x0d00ff81;
+ static const u32 CTRL_ACTION = BIT(ASCII_NULL) |
+ GENMASK(ASCII_SHIFTIN, ASCII_BELL) | BIT(ASCII_CANCEL) |
+ BIT(ASCII_SUBSTITUTE) | BIT(ASCII_ESCAPE);
/* Cannot be overridden by disp_ctrl */
- static const u32 CTRL_ALWAYS = 0x0800f501;
+ static const u32 CTRL_ALWAYS = BIT(ASCII_NULL) | BIT(ASCII_BACKSPACE) |
+ BIT(ASCII_LINEFEED) | BIT(ASCII_SHIFTIN) | BIT(ASCII_SHIFTOUT) |
+ BIT(ASCII_CAR_RET) | BIT(ASCII_FORMFEED) | BIT(ASCII_ESCAPE);
if (vc->vc_state != ESnormal)
return true;
@@ -2776,70 +2966,159 @@ static bool vc_is_control(struct vc_data *vc, int tc, int c)
* useless without them; to display an arbitrary font position use the
* direct-to-font zone in UTF-8 mode.
*/
- if (c < 32) {
+ if (c < BITS_PER_TYPE(CTRL_ALWAYS)) {
if (vc->vc_disp_ctrl)
return CTRL_ALWAYS & BIT(c);
else
return vc->vc_utf || (CTRL_ACTION & BIT(c));
}
- if (c == 127 && !vc->vc_disp_ctrl)
+ if (c == ASCII_DEL && !vc->vc_disp_ctrl)
return true;
- if (c == 128 + 27)
+ if (c == ASCII_EXT_CSI)
return true;
return false;
}
+static void vc_con_rewind(struct vc_data *vc)
+{
+ if (vc->state.x && !vc->vc_need_wrap) {
+ vc->vc_pos -= 2;
+ vc->state.x--;
+ }
+ vc->vc_need_wrap = 0;
+}
+
+#define UCS_ZWS 0x200b /* Zero Width Space */
+#define UCS_VS16 0xfe0f /* Variation Selector 16 */
+#define UCS_REPLACEMENT 0xfffd /* Replacement Character */
+
+static int vc_process_ucs(struct vc_data *vc, int *c, int *tc)
+{
+ u32 prev_c, curr_c = *c;
+
+ if (ucs_is_double_width(curr_c)) {
+ /*
+ * The Unicode screen memory is allocated only when
+ * required. This is one such case as we need to remember
+ * which displayed characters are double-width.
+ */
+ vc_uniscr_check(vc);
+ return 2;
+ }
+
+ if (!ucs_is_zero_width(curr_c))
+ return 1;
+
+ /* From here curr_c is known to be zero-width. */
+
+ if (ucs_is_double_width(vc_uniscr_getc(vc, -2))) {
+ /*
+ * Let's merge this zero-width code point with the preceding
+ * double-width code point by replacing the existing
+ * zero-width space padding. To do so we rewind one column
+ * and pretend this has a width of 1.
+ * We give the legacy display the same initial space padding.
+ */
+ vc_con_rewind(vc);
+ *tc = ' ';
+ return 1;
+ }
+
+ /* From here the preceding character, if any, must be single-width. */
+ prev_c = vc_uniscr_getc(vc, -1);
+
+ if (curr_c == UCS_VS16 && prev_c != 0) {
+ /*
+ * VS16 (U+FE0F) is special. It typically turns the preceding
+ * single-width character into a double-width one. Let it
+ * have a width of 1 effectively making the combination with
+ * the preceding character double-width.
+ */
+ *tc = ' ';
+ return 1;
+ }
+
+ /* try recomposition */
+ prev_c = ucs_recompose(prev_c, curr_c);
+ if (prev_c != 0) {
+ vc_con_rewind(vc);
+ *tc = *c = prev_c;
+ return 1;
+ }
+
+ /* Otherwise zero-width code points are ignored. */
+ return 0;
+}
+
+static int vc_get_glyph(struct vc_data *vc, int tc)
+{
+ int glyph = conv_uni_to_pc(vc, tc);
+ u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
+
+ if (!(glyph & ~charmask))
+ return glyph;
+
+ if (glyph == -1)
+ return -1; /* nothing to display */
+
+ /* Glyph not found */
+ if ((!vc->vc_utf || vc->vc_disp_ctrl || tc < 128) && !(tc & ~charmask)) {
+ /*
+ * In legacy mode use the glyph we get by a 1:1 mapping.
+ * This would make absolutely no sense with Unicode in mind, but do this for
+ * ASCII characters since a font may lack Unicode mapping info and we don't
+ * want to end up with having question marks only.
+ */
+ return tc;
+ }
+
+ /*
+ * The Unicode screen memory is allocated only when required.
+ * This is one such case: we're about to "cheat" with the displayed
+ * character meaning the simple screen buffer won't hold the original
+ * information, whereas the Unicode screen buffer always does.
+ */
+ vc_uniscr_check(vc);
+
+ /* Try getting a simpler fallback character. */
+ tc = ucs_get_fallback(tc);
+ if (tc)
+ return vc_get_glyph(vc, tc);
+
+ /* Display U+FFFD (Unicode Replacement Character). */
+ return conv_uni_to_pc(vc, UCS_REPLACEMENT);
+}
+
static int vc_con_write_normal(struct vc_data *vc, int tc, int c,
struct vc_draw_region *draw)
{
int next_c;
unsigned char vc_attr = vc->vc_attr;
- u16 himask = vc->vc_hi_font_mask, charmask = himask ? 0x1ff : 0xff;
+ u16 himask = vc->vc_hi_font_mask;
u8 width = 1;
bool inverse = false;
if (vc->vc_utf && !vc->vc_disp_ctrl) {
- if (is_double_width(c))
- width = 2;
+ width = vc_process_ucs(vc, &c, &tc);
+ if (!width)
+ goto out;
}
/* Now try to find out how to display it */
- tc = conv_uni_to_pc(vc, tc);
- if (tc & ~charmask) {
- if (tc == -1 || tc == -2)
- return -1; /* nothing to display */
-
- /* Glyph not found */
- if ((!vc->vc_utf || vc->vc_disp_ctrl || c < 128) &&
- !(c & ~charmask)) {
- /*
- * In legacy mode use the glyph we get by a 1:1
- * mapping.
- * This would make absolutely no sense with Unicode in
- * mind, but do this for ASCII characters since a font
- * may lack Unicode mapping info and we don't want to
- * end up with having question marks only.
- */
- tc = c;
- } else {
- /*
- * Display U+FFFD. If it's not found, display an inverse
- * question mark.
- */
- tc = conv_uni_to_pc(vc, 0xfffd);
- if (tc < 0) {
- inverse = true;
- tc = conv_uni_to_pc(vc, '?');
- if (tc < 0)
- tc = '?';
-
- vc_attr = vc_invert_attr(vc);
- con_flush(vc, draw);
- }
- }
+ tc = vc_get_glyph(vc, tc);
+ if (tc == -1)
+ return -1; /* nothing to display */
+ if (tc < 0) {
+ inverse = true;
+ tc = conv_uni_to_pc(vc, '?');
+ if (tc < 0)
+ tc = '?';
+
+ vc_attr = vc_invert_attr(vc);
+ con_flush(vc, draw);
}
next_c = c;
@@ -2880,8 +3159,14 @@ static int vc_con_write_normal(struct vc_data *vc, int tc, int c,
tc = conv_uni_to_pc(vc, ' ');
if (tc < 0)
tc = ' ';
- next_c = ' ';
+ /*
+ * Store a zero-width space in the Unicode screen given that
+ * the previous code point is semantically double width.
+ */
+ next_c = UCS_ZWS;
}
+
+out:
notify_write(vc, c);
if (inverse)
@@ -2891,33 +3176,25 @@ static int vc_con_write_normal(struct vc_data *vc, int tc, int c,
}
/* acquires console_lock */
-static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count)
+static int do_con_write(struct tty_struct *tty, const u8 *buf, int count)
{
struct vc_draw_region draw = {
.x = -1,
};
int c, tc, n = 0;
unsigned int currcons;
- struct vc_data *vc;
+ struct vc_data *vc = tty->driver_data;
struct vt_notifier_param param;
bool rescan;
if (in_interrupt())
return count;
- console_lock();
- vc = tty->driver_data;
- if (vc == NULL) {
- pr_err("vt: argh, driver_data is NULL !\n");
- console_unlock();
- return 0;
- }
-
+ guard(console_lock)();
currcons = vc->vc_num;
if (!vc_cons_allocated(currcons)) {
/* could this happen? */
pr_warn_once("con_write: tty %d not allocated\n", currcons+1);
- console_unlock();
return 0;
}
@@ -2929,7 +3206,7 @@ static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int co
param.vc = vc;
while (!tty->flow.stopped && count) {
- int orig = *buf;
+ u8 orig = *buf;
buf++;
n++;
count--;
@@ -2959,10 +3236,9 @@ rescan_last_byte:
goto rescan_last_byte;
}
con_flush(vc, &draw);
- vc_uniscr_debug_check(vc);
console_conditional_schedule();
notify_update(vc);
- console_unlock();
+
return n;
}
@@ -2977,7 +3253,7 @@ rescan_last_byte:
*/
static void console_callback(struct work_struct *ignored)
{
- console_lock();
+ guard(console_lock)();
if (want_console >= 0) {
if (want_console != fg_console &&
@@ -3006,8 +3282,6 @@ static void console_callback(struct work_struct *ignored)
blank_timer_expired = 0;
}
notify_update(vc_cons[fg_console].d);
-
- console_unlock();
}
int set_console(int nr)
@@ -3039,16 +3313,16 @@ struct tty_driver *console_driver;
#ifdef CONFIG_VT_CONSOLE
/**
- * vt_kmsg_redirect() - Sets/gets the kernel message console
- * @new: The new virtual terminal number or -1 if the console should stay
- * unchanged
+ * vt_kmsg_redirect() - sets/gets the kernel message console
+ * @new: the new virtual terminal number or -1 if the console should stay
+ * unchanged
*
* By default, the kernel messages are always printed on the current virtual
* console. However, the user may modify that default with the
- * TIOCL_SETKMSGREDIRECT ioctl call.
+ * %TIOCL_SETKMSGREDIRECT ioctl call.
*
* This function sets the kernel message console to be @new. It returns the old
- * virtual console number. The virtual terminal number 0 (both as parameter and
+ * virtual console number. The virtual terminal number %0 (both as parameter and
* return value) means no redirection (i.e. always printed on the currently
* active console).
*
@@ -3056,8 +3330,8 @@ struct tty_driver *console_driver;
* value is not modified. You may use the macro vt_get_kmsg_redirect() in that
* case to make the code more understandable.
*
- * When the kernel is compiled without CONFIG_VT_CONSOLE, this function ignores
- * the parameter and always returns 0.
+ * When the kernel is compiled without %CONFIG_VT_CONSOLE, this function ignores
+ * the parameter and always returns %0.
*/
int vt_kmsg_redirect(int new)
{
@@ -3112,22 +3386,23 @@ static void vt_console_print(struct console *co, const char *b, unsigned count)
cnt = 0;
while (count--) {
c = *b++;
- if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) {
+ if (c == ASCII_LINEFEED || c == ASCII_CAR_RET ||
+ c == ASCII_BACKSPACE || vc->vc_need_wrap) {
if (cnt && con_is_visible(vc))
vc->vc_sw->con_putcs(vc, start, cnt, vc->state.y, start_x);
cnt = 0;
- if (c == 8) { /* backspace */
+ if (c == ASCII_BACKSPACE) {
bs(vc);
start = (ushort *)vc->vc_pos;
start_x = vc->state.x;
continue;
}
- if (c != 13)
+ if (c != ASCII_CAR_RET)
lf(vc);
cr(vc);
start = (ushort *)vc->vc_pos;
start_x = vc->state.x;
- if (c == 10 || c == 13)
+ if (c == ASCII_LINEFEED || c == ASCII_CAR_RET)
continue;
}
vc_uniscr_putc(vc, c);
@@ -3156,8 +3431,14 @@ static struct tty_driver *vt_console_device(struct console *c, int *index)
return console_driver;
}
+static int vt_console_setup(struct console *co, char *options)
+{
+ return co->index >= MAX_NR_CONSOLES ? -EINVAL : 0;
+}
+
static struct console vt_console_driver = {
.name = "tty",
+ .setup = vt_console_setup,
.write = vt_console_print,
.device = vt_console_device,
.unblank = unblank_screen,
@@ -3185,6 +3466,8 @@ int tioclinux(struct tty_struct *tty, unsigned long arg)
{
char type, data;
char __user *p = (char __user *)arg;
+ void __user *param_aligned32 = (u32 __user *)arg + 1;
+ void __user *param = (void __user *)arg + 1;
int lines;
int ret;
@@ -3194,93 +3477,80 @@ int tioclinux(struct tty_struct *tty, unsigned long arg)
return -EFAULT;
ret = 0;
- switch (type)
- {
- case TIOCL_SETSEL:
- ret = set_selection_user((struct tiocl_selection
- __user *)(p+1), tty);
- break;
- case TIOCL_PASTESEL:
- ret = paste_selection(tty);
- break;
- case TIOCL_UNBLANKSCREEN:
- console_lock();
+ switch (type) {
+ case TIOCL_SETSEL:
+ return set_selection_user(param, tty);
+ case TIOCL_PASTESEL:
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+ return paste_selection(tty);
+ case TIOCL_UNBLANKSCREEN:
+ scoped_guard(console_lock)
unblank_screen();
- console_unlock();
- break;
- case TIOCL_SELLOADLUT:
- console_lock();
- ret = sel_loadlut(p);
- console_unlock();
- break;
- case TIOCL_GETSHIFTSTATE:
-
- /*
- * Make it possible to react to Shift+Mousebutton.
- * Note that 'shift_state' is an undocumented
- * kernel-internal variable; programs not closely
- * related to the kernel should not use this.
- */
- data = vt_get_shift_state();
- ret = put_user(data, p);
- break;
- case TIOCL_GETMOUSEREPORTING:
- console_lock(); /* May be overkill */
+ break;
+ case TIOCL_SELLOADLUT:
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+ return sel_loadlut(param_aligned32);
+ case TIOCL_GETSHIFTSTATE:
+ /*
+ * Make it possible to react to Shift+Mousebutton. Note that
+ * 'shift_state' is an undocumented kernel-internal variable;
+ * programs not closely related to the kernel should not use
+ * this.
+ */
+ data = vt_get_shift_state();
+ return put_user(data, p);
+ case TIOCL_GETMOUSEREPORTING:
+ scoped_guard(console_lock) /* May be overkill */
data = mouse_reporting();
- console_unlock();
- ret = put_user(data, p);
- break;
- case TIOCL_SETVESABLANK:
- console_lock();
- ret = set_vesa_blanking(p);
- console_unlock();
- break;
- case TIOCL_GETKMSGREDIRECT:
- data = vt_get_kmsg_redirect();
- ret = put_user(data, p);
- break;
- case TIOCL_SETKMSGREDIRECT:
- if (!capable(CAP_SYS_ADMIN)) {
- ret = -EPERM;
- } else {
- if (get_user(data, p+1))
- ret = -EFAULT;
- else
- vt_kmsg_redirect(data);
- }
- break;
- case TIOCL_GETFGCONSOLE:
- /* No locking needed as this is a transiently
- correct return anyway if the caller hasn't
- disabled switching */
- ret = fg_console;
- break;
- case TIOCL_SCROLLCONSOLE:
- if (get_user(lines, (s32 __user *)(p+4))) {
- ret = -EFAULT;
- } else {
- /* Need the console lock here. Note that lots
- of other calls need fixing before the lock
- is actually useful ! */
- console_lock();
- scrollfront(vc_cons[fg_console].d, lines);
- console_unlock();
- ret = 0;
- }
- break;
- case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */
- console_lock();
+ return put_user(data, p);
+ case TIOCL_SETVESABLANK:
+ return set_vesa_blanking(param);
+ case TIOCL_GETKMSGREDIRECT:
+ data = vt_get_kmsg_redirect();
+ return put_user(data, p);
+ case TIOCL_SETKMSGREDIRECT:
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (get_user(data, p+1))
+ return -EFAULT;
+
+ vt_kmsg_redirect(data);
+
+ break;
+ case TIOCL_GETFGCONSOLE:
+ /*
+ * No locking needed as this is a transiently correct return
+ * anyway if the caller hasn't disabled switching.
+ */
+ return fg_console;
+ case TIOCL_SCROLLCONSOLE:
+ if (get_user(lines, (s32 __user *)param_aligned32))
+ return -EFAULT;
+
+ /*
+ * Needs the console lock here. Note that lots of other calls
+ * need fixing before the lock is actually useful!
+ */
+ scoped_guard(console_lock)
+ scrollfront(vc_cons[fg_console].d, lines);
+ break;
+ case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */
+ scoped_guard(console_lock) {
ignore_poke = 1;
do_blank_screen(0);
- console_unlock();
- break;
- case TIOCL_BLANKEDSCREEN:
- ret = console_blanked;
- break;
- default:
- ret = -EINVAL;
- break;
+ }
+ break;
+ case TIOCL_BLANKEDSCREEN:
+ return console_blanked;
+ case TIOCL_GETBRACKETEDPASTE:
+ return get_bracketed_paste(tty);
+ default:
+ return -EINVAL;
}
+
return ret;
}
@@ -3288,7 +3558,7 @@ int tioclinux(struct tty_struct *tty, unsigned long arg)
* /dev/ttyN handling
*/
-static int con_write(struct tty_struct *tty, const unsigned char *buf, int count)
+static ssize_t con_write(struct tty_struct *tty, const u8 *buf, size_t count)
{
int retval;
@@ -3298,7 +3568,7 @@ static int con_write(struct tty_struct *tty, const unsigned char *buf, int count
return retval;
}
-static int con_put_char(struct tty_struct *tty, unsigned char ch)
+static int con_put_char(struct tty_struct *tty, u8 ch)
{
return do_con_write(tty, &ch, 1);
}
@@ -3356,17 +3626,13 @@ static void con_start(struct tty_struct *tty)
static void con_flush_chars(struct tty_struct *tty)
{
- struct vc_data *vc;
+ struct vc_data *vc = tty->driver_data;
if (in_interrupt()) /* from flush_to_ldisc */
return;
- /* if we race with con_close(), vt may be null */
- console_lock();
- vc = tty->driver_data;
- if (vc)
- set_cursor(vc);
- console_unlock();
+ guard(console_lock)();
+ set_cursor(vc);
}
/*
@@ -3378,22 +3644,20 @@ static int con_install(struct tty_driver *driver, struct tty_struct *tty)
struct vc_data *vc;
int ret;
- console_lock();
+ guard(console_lock)();
ret = vc_allocate(currcons);
if (ret)
- goto unlock;
+ return ret;
vc = vc_cons[currcons].d;
/* Still being freed */
- if (vc->port.tty) {
- ret = -ERESTARTSYS;
- goto unlock;
- }
+ if (vc->port.tty)
+ return -ERESTARTSYS;
ret = tty_port_install(&vc->port, driver, tty);
if (ret)
- goto unlock;
+ return ret;
tty->driver_data = vc;
vc->port.tty = tty;
@@ -3407,9 +3671,8 @@ static int con_install(struct tty_driver *driver, struct tty_struct *tty)
tty->termios.c_iflag |= IUTF8;
else
tty->termios.c_iflag &= ~IUTF8;
-unlock:
- console_unlock();
- return ret;
+
+ return 0;
}
static int con_open(struct tty_struct *tty, struct file *filp)
@@ -3428,9 +3691,9 @@ static void con_shutdown(struct tty_struct *tty)
{
struct vc_data *vc = tty->driver_data;
BUG_ON(vc == NULL);
- console_lock();
+
+ guard(console_lock)();
vc->port.tty = NULL;
- console_unlock();
}
static void con_cleanup(struct tty_struct *tty)
@@ -3440,6 +3703,15 @@ static void con_cleanup(struct tty_struct *tty)
tty_port_put(&vc->port);
}
+/*
+ * We can't deal with anything but the N_TTY ldisc,
+ * because we can sleep in our write() routine.
+ */
+static int con_ldisc_ok(struct tty_struct *tty, int ldisc)
+{
+ return ldisc == N_TTY ? 0 : -EINVAL;
+}
+
static int default_color = 7; /* white */
static int default_italic_color = 2; // green (ASCII)
static int default_underline_color = 3; // cyan (ASCII)
@@ -3447,16 +3719,10 @@ module_param_named(color, default_color, int, S_IRUGO | S_IWUSR);
module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR);
module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR);
-static void vc_init(struct vc_data *vc, unsigned int rows,
- unsigned int cols, int do_clear)
+static void vc_init(struct vc_data *vc, int do_clear)
{
int j, k ;
- vc->vc_cols = cols;
- vc->vc_rows = rows;
- vc->vc_size_row = cols << 1;
- vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
-
set_origin(vc);
vc->vc_pos = vc->vc_origin;
reset_vc(vc);
@@ -3521,18 +3787,17 @@ static int __init con_init(void)
vc_cons[currcons].d = vc = kzalloc(sizeof(struct vc_data), GFP_NOWAIT);
INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
tty_port_init(&vc->port);
- visual_init(vc, currcons, 1);
+ visual_init(vc, currcons, true);
/* Assuming vc->vc_{cols,rows,screenbuf_size} are sane here. */
vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_NOWAIT);
- vc_init(vc, vc->vc_rows, vc->vc_cols,
- currcons || !vc->vc_sw->con_save_screen);
+ vc_init(vc, currcons || !vc->vc_sw->con_save_screen);
}
currcons = fg_console = 0;
master_display_fg = vc = vc_cons[currcons].d;
set_origin(vc);
save_screen(vc);
gotoxy(vc, vc->state.x, vc->state.y);
- csi_J(vc, 0);
+ csi_J(vc, CSI_J_CURSOR_TO_END);
update_screen(vc);
pr_info("Console: %s %s %dx%d\n",
vc->vc_can_do_color ? "colour" : "mono",
@@ -3566,6 +3831,7 @@ static const struct tty_operations con_ops = {
.resize = vt_resize,
.shutdown = con_shutdown,
.cleanup = con_cleanup,
+ .ldisc_ok = con_ldisc_ok,
};
static struct cdev vc0_cdev;
@@ -3590,7 +3856,7 @@ int __init vty_init(const struct file_operations *console_fops)
if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) ||
register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0)
panic("Couldn't register /dev/tty0 driver\n");
- tty0dev = device_create_with_groups(tty_class, NULL,
+ tty0dev = device_create_with_groups(&tty_class, NULL,
MKDEV(TTY_MAJOR, 0), NULL,
vt_dev_groups, "tty0");
if (IS_ERR(tty0dev))
@@ -3622,9 +3888,9 @@ int __init vty_init(const struct file_operations *console_fops)
return 0;
}
-#ifndef VT_SINGLE_DRIVER
-
-static struct class *vtconsole_class;
+static const struct class vtconsole_class = {
+ .name = "vtconsole",
+};
static int do_bind_con_driver(const struct consw *csw, int first, int last,
int deflt)
@@ -3691,7 +3957,7 @@ static int do_bind_con_driver(const struct consw *csw, int first, int last,
old_was_color = vc->vc_can_do_color;
vc->vc_sw->con_deinit(vc);
vc->vc_origin = (unsigned long)vc->vc_screenbuf;
- visual_init(vc, i, 0);
+ visual_init(vc, i, false);
set_origin(vc);
update_attr(vc);
@@ -3916,15 +4182,13 @@ static ssize_t store_bind(struct device *dev, struct device_attribute *attr,
struct con_driver *con = dev_get_drvdata(dev);
int bind = simple_strtoul(buf, NULL, 0);
- console_lock();
+ guard(console_lock)();
if (bind)
vt_bind(con);
else
vt_unbind(con);
- console_unlock();
-
return count;
}
@@ -3934,9 +4198,8 @@ static ssize_t show_bind(struct device *dev, struct device_attribute *attr,
struct con_driver *con = dev_get_drvdata(dev);
int bind;
- console_lock();
- bind = con_is_bound(con->con);
- console_unlock();
+ scoped_guard(console_lock)
+ bind = con_is_bound(con->con);
return sysfs_emit(buf, "%i\n", bind);
}
@@ -3981,7 +4244,7 @@ static void vtconsole_deinit_device(struct con_driver *con)
* RETURNS: zero if unbound, nonzero if bound
*
* Drivers can call this and if zero, they should release
- * all resources allocated on con_startup()
+ * all resources allocated on &consw.con_startup()
*/
int con_is_bound(const struct consw *csw)
{
@@ -4021,15 +4284,9 @@ EXPORT_SYMBOL(con_is_visible);
* Called when the console is taken over by the kernel debugger, this
* function needs to save the current console state, then put the console
* into a state suitable for the kernel debugger.
- *
- * RETURNS:
- * Zero on success, nonzero if a failure occurred when trying to prepare
- * the console for the debugger.
*/
-int con_debug_enter(struct vc_data *vc)
+void con_debug_enter(struct vc_data *vc)
{
- int ret = 0;
-
saved_fg_console = fg_console;
saved_last_console = last_console;
saved_want_console = want_console;
@@ -4038,7 +4295,7 @@ int con_debug_enter(struct vc_data *vc)
vc->vc_mode = KD_TEXT;
console_blanked = 0;
if (vc->vc_sw->con_debug_enter)
- ret = vc->vc_sw->con_debug_enter(vc);
+ vc->vc_sw->con_debug_enter(vc);
#ifdef CONFIG_KGDB_KDB
/* Set the initial LINES variable if it is not already set */
if (vc->vc_rows < 999) {
@@ -4068,7 +4325,6 @@ int con_debug_enter(struct vc_data *vc)
}
}
#endif /* CONFIG_KGDB_KDB */
- return ret;
}
EXPORT_SYMBOL_GPL(con_debug_enter);
@@ -4077,15 +4333,10 @@ EXPORT_SYMBOL_GPL(con_debug_enter);
*
* Restore the console state to what it was before the kernel debugger
* was invoked.
- *
- * RETURNS:
- * Zero on success, nonzero if a failure occurred when trying to restore
- * the console.
*/
-int con_debug_leave(void)
+void con_debug_leave(void)
{
struct vc_data *vc;
- int ret = 0;
fg_console = saved_fg_console;
last_console = saved_last_console;
@@ -4095,8 +4346,7 @@ int con_debug_leave(void)
vc = vc_cons[fg_console].d;
if (vc->vc_sw->con_debug_leave)
- ret = vc->vc_sw->con_debug_leave(vc);
- return ret;
+ vc->vc_sw->con_debug_leave(vc);
}
EXPORT_SYMBOL_GPL(con_debug_leave);
@@ -4151,7 +4401,7 @@ static int do_register_con_driver(const struct consw *csw, int first, int last)
goto err;
con_driver->dev =
- device_create_with_groups(vtconsole_class, NULL,
+ device_create_with_groups(&vtconsole_class, NULL,
MKDEV(0, con_driver->node),
con_driver, con_dev_groups,
"vtcon%i", con_driver->node);
@@ -4221,7 +4471,7 @@ static void con_driver_unregister_callback(struct work_struct *ignored)
{
int i;
- console_lock();
+ guard(console_lock)();
for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
struct con_driver *con_driver = &registered_con_driver[i];
@@ -4232,7 +4482,7 @@ static void con_driver_unregister_callback(struct work_struct *ignored)
console_unlock();
vtconsole_deinit_device(con_driver);
- device_destroy(vtconsole_class, MKDEV(0, con_driver->node));
+ device_destroy(&vtconsole_class, MKDEV(0, con_driver->node));
console_lock();
@@ -4246,8 +4496,6 @@ static void con_driver_unregister_callback(struct work_struct *ignored)
con_driver->first = 0;
con_driver->last = 0;
}
-
- console_unlock();
}
/*
@@ -4283,21 +4531,18 @@ EXPORT_SYMBOL_GPL(do_take_over_console);
*/
void give_up_console(const struct consw *csw)
{
- console_lock();
+ guard(console_lock)();
do_unregister_con_driver(csw);
- console_unlock();
}
+EXPORT_SYMBOL(give_up_console);
static int __init vtconsole_class_init(void)
{
int i;
- vtconsole_class = class_create(THIS_MODULE, "vtconsole");
- if (IS_ERR(vtconsole_class)) {
- pr_warn("Unable to create vt console class; errno = %ld\n",
- PTR_ERR(vtconsole_class));
- vtconsole_class = NULL;
- }
+ i = class_register(&vtconsole_class);
+ if (i)
+ pr_warn("Unable to create vt console class; errno = %d\n", i);
/* Add system drivers to sysfs */
for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
@@ -4305,7 +4550,7 @@ static int __init vtconsole_class_init(void)
if (con->con && !con->dev) {
con->dev =
- device_create_with_groups(vtconsole_class, NULL,
+ device_create_with_groups(&vtconsole_class, NULL,
MKDEV(0, con->node),
con, con_dev_groups,
"vtcon%i", con->node);
@@ -4324,20 +4569,20 @@ static int __init vtconsole_class_init(void)
}
postcore_initcall(vtconsole_class_init);
-#endif
-
/*
* Screen blanking
*/
-static int set_vesa_blanking(char __user *p)
+static int set_vesa_blanking(u8 __user *mode_user)
{
- unsigned int mode;
+ u8 mode;
- if (get_user(mode, p + 1))
+ if (get_user(mode, mode_user))
return -EFAULT;
- vesa_blank_mode = (mode < 4) ? mode : 0;
+ guard(console_lock)();
+ vesa_blank_mode = (mode <= VESA_BLANK_MAX) ? mode : VESA_NO_BLANKING;
+
return 0;
}
@@ -4362,7 +4607,7 @@ void do_blank_screen(int entering_gfx)
if (entering_gfx) {
hide_cursor(vc);
save_screen(vc);
- vc->vc_sw->con_blank(vc, -1, 1);
+ vc->vc_sw->con_blank(vc, VESA_VSYNC_SUSPEND, 1);
console_blanked = fg_console + 1;
blank_state = blank_off;
set_origin(vc);
@@ -4378,12 +4623,13 @@ void do_blank_screen(int entering_gfx)
}
hide_cursor(vc);
- del_timer_sync(&console_timer);
+ timer_delete_sync(&console_timer);
blank_timer_expired = 0;
save_screen(vc);
/* In case we need to reset origin, blanking hook returns 1 */
- i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0);
+ i = vc->vc_sw->con_blank(vc, vesa_off_interval ? VESA_VSYNC_SUSPEND :
+ (vesa_blank_mode + 1), 0);
console_blanked = fg_console + 1;
if (i)
set_origin(vc);
@@ -4434,7 +4680,7 @@ void do_unblank_screen(int leaving_gfx)
}
console_blanked = 0;
- if (vc->vc_sw->con_blank(vc, 0, leaving_gfx))
+ if (vc->vc_sw->con_blank(vc, VESA_NO_BLANKING, leaving_gfx))
/* Low-level driver cannot restore -> do it ourselves */
update_screen(vc);
if (console_blank_hook)
@@ -4442,6 +4688,7 @@ void do_unblank_screen(int leaving_gfx)
set_palette(vc);
set_cursor(vc);
vt_event_post(VT_EVENT_UNBLANK, vc->vc_num, vc->vc_num);
+ notify_update(vc);
}
EXPORT_SYMBOL(do_unblank_screen);
@@ -4482,7 +4729,7 @@ void poke_blanked_console(void)
/* This isn't perfectly race free, but a race here would be mostly harmless,
* at worst, we'll do a spurious blank and it's unlikely
*/
- del_timer(&console_timer);
+ timer_delete(&console_timer);
blank_timer_expired = 0;
if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS)
@@ -4520,7 +4767,7 @@ int con_set_cmap(unsigned char __user *arg)
if (copy_from_user(colormap, arg, sizeof(colormap)))
return -EFAULT;
- console_lock();
+ guard(console_lock)();
for (i = k = 0; i < 16; i++) {
default_red[i] = colormap[k++];
default_grn[i] = colormap[k++];
@@ -4536,7 +4783,6 @@ int con_set_cmap(unsigned char __user *arg)
}
set_palette(vc_cons[i].d);
}
- console_unlock();
return 0;
}
@@ -4546,13 +4792,12 @@ int con_get_cmap(unsigned char __user *arg)
int i, k;
unsigned char colormap[3*16];
- console_lock();
- for (i = k = 0; i < 16; i++) {
- colormap[k++] = default_red[i];
- colormap[k++] = default_grn[i];
- colormap[k++] = default_blu[i];
- }
- console_unlock();
+ scoped_guard(console_lock)
+ for (i = k = 0; i < 16; i++) {
+ colormap[k++] = default_red[i];
+ colormap[k++] = default_grn[i];
+ colormap[k++] = default_blu[i];
+ }
if (copy_to_user(arg, colormap, sizeof(colormap)))
return -EFAULT;
@@ -4574,83 +4819,86 @@ void reset_palette(struct vc_data *vc)
/*
* Font switching
*
- * Currently we only support fonts up to 32 pixels wide, at a maximum height
- * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
- * depending on width) reserved for each character which is kinda wasty, but
- * this is done in order to maintain compatibility with the EGA/VGA fonts. It
- * is up to the actual low-level console-driver convert data into its favorite
- * format (maybe we should add a `fontoffset' field to the `display'
- * structure so we won't have to convert the fontdata all the time.
+ * Currently we only support fonts up to 128 pixels wide, at a maximum height
+ * of 128 pixels. Userspace fontdata may have to be stored with 32 bytes
+ * (shorts/ints, depending on width) reserved for each character which is
+ * kinda wasty, but this is done in order to maintain compatibility with the
+ * EGA/VGA fonts. It is up to the actual low-level console-driver convert data
+ * into its favorite format (maybe we should add a `fontoffset' field to the
+ * `display' structure so we won't have to convert the fontdata all the time.
* /Jes
*/
-#define max_font_size 65536
+#define max_font_width 64
+#define max_font_height 128
+#define max_font_glyphs 512
+#define max_font_size (max_font_glyphs*max_font_width*max_font_height)
static int con_font_get(struct vc_data *vc, struct console_font_op *op)
{
struct console_font font;
- int rc = -EINVAL;
int c;
+ unsigned int vpitch = op->op == KD_FONT_OP_GET_TALL ? op->height : 32;
+
+ if (vpitch > max_font_height)
+ return -EINVAL;
+ void *font_data __free(kvfree) = NULL;
if (op->data) {
- font.data = kmalloc(max_font_size, GFP_KERNEL);
+ font.data = font_data = kvzalloc(max_font_size, GFP_KERNEL);
if (!font.data)
return -ENOMEM;
} else
font.data = NULL;
- console_lock();
- if (vc->vc_mode != KD_TEXT)
- rc = -EINVAL;
- else if (vc->vc_sw->con_font_get)
- rc = vc->vc_sw->con_font_get(vc, &font);
- else
- rc = -ENOSYS;
- console_unlock();
+ scoped_guard(console_lock) {
+ if (vc->vc_mode != KD_TEXT)
+ return -EINVAL;
+ if (!vc->vc_sw->con_font_get)
+ return -ENOSYS;
- if (rc)
- goto out;
+ int ret = vc->vc_sw->con_font_get(vc, &font, vpitch);
+ if (ret)
+ return ret;
+ }
- c = (font.width+7)/8 * 32 * font.charcount;
+ c = DIV_ROUND_UP(font.width, 8) * vpitch * font.charcount;
if (op->data && font.charcount > op->charcount)
- rc = -ENOSPC;
+ return -ENOSPC;
if (font.width > op->width || font.height > op->height)
- rc = -ENOSPC;
- if (rc)
- goto out;
+ return -ENOSPC;
op->height = font.height;
op->width = font.width;
op->charcount = font.charcount;
if (op->data && copy_to_user(op->data, font.data, c))
- rc = -EFAULT;
+ return -EFAULT;
-out:
- kfree(font.data);
- return rc;
+ return 0;
}
-static int con_font_set(struct vc_data *vc, struct console_font_op *op)
+static int con_font_set(struct vc_data *vc, const struct console_font_op *op)
{
struct console_font font;
- int rc = -EINVAL;
int size;
+ unsigned int vpitch = op->op == KD_FONT_OP_SET_TALL ? op->height : 32;
- if (vc->vc_mode != KD_TEXT)
- return -EINVAL;
if (!op->data)
return -EINVAL;
- if (op->charcount > 512)
+ if (op->charcount > max_font_glyphs)
+ return -EINVAL;
+ if (op->width <= 0 || op->width > max_font_width || !op->height ||
+ op->height > max_font_height)
return -EINVAL;
- if (op->width <= 0 || op->width > 32 || !op->height || op->height > 32)
+ if (vpitch < op->height)
return -EINVAL;
- size = (op->width+7)/8 * 32 * op->charcount;
+ size = DIV_ROUND_UP(op->width, 8) * vpitch * op->charcount;
if (size > max_font_size)
return -ENOSPC;
- font.data = memdup_user(op->data, size);
+ void *font_data __free(kfree) = font.data = memdup_user(op->data, size);
if (IS_ERR(font.data))
return PTR_ERR(font.data);
@@ -4658,18 +4906,17 @@ static int con_font_set(struct vc_data *vc, struct console_font_op *op)
font.width = op->width;
font.height = op->height;
- console_lock();
+ guard(console_lock)();
+
if (vc->vc_mode != KD_TEXT)
- rc = -EINVAL;
- else if (vc->vc_sw->con_font_set) {
- if (vc_is_sel(vc))
- clear_selection();
- rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
- } else
- rc = -ENOSYS;
- console_unlock();
- kfree(font.data);
- return rc;
+ return -EINVAL;
+ if (!vc->vc_sw->con_font_set)
+ return -ENOSYS;
+
+ if (vc_is_sel(vc))
+ clear_selection();
+
+ return vc->vc_sw->con_font_set(vc, &font, vpitch, op->flags);
}
static int con_font_default(struct vc_data *vc, struct console_font_op *op)
@@ -4677,8 +4924,6 @@ static int con_font_default(struct vc_data *vc, struct console_font_op *op)
struct console_font font = {.width = op->width, .height = op->height};
char name[MAX_FONT_NAME];
char *s = name;
- int rc;
-
if (!op->data)
s = NULL;
@@ -4687,31 +4932,33 @@ static int con_font_default(struct vc_data *vc, struct console_font_op *op)
else
name[MAX_FONT_NAME - 1] = 0;
- console_lock();
- if (vc->vc_mode != KD_TEXT) {
- console_unlock();
- return -EINVAL;
- }
- if (vc->vc_sw->con_font_default) {
+ scoped_guard(console_lock) {
+ if (vc->vc_mode != KD_TEXT)
+ return -EINVAL;
+ if (!vc->vc_sw->con_font_default)
+ return -ENOSYS;
+
if (vc_is_sel(vc))
clear_selection();
- rc = vc->vc_sw->con_font_default(vc, &font, s);
- } else
- rc = -ENOSYS;
- console_unlock();
- if (!rc) {
- op->width = font.width;
- op->height = font.height;
+ int ret = vc->vc_sw->con_font_default(vc, &font, s);
+ if (ret)
+ return ret;
}
- return rc;
+
+ op->width = font.width;
+ op->height = font.height;
+
+ return 0;
}
int con_font_op(struct vc_data *vc, struct console_font_op *op)
{
switch (op->op) {
case KD_FONT_OP_SET:
+ case KD_FONT_OP_SET_TALL:
return con_font_set(vc, op);
case KD_FONT_OP_GET:
+ case KD_FONT_OP_GET_TALL:
return con_font_get(vc, op);
case KD_FONT_OP_SET_DEFAULT:
return con_font_default(vc, op);
@@ -4740,10 +4987,11 @@ EXPORT_SYMBOL_GPL(screen_glyph);
u32 screen_glyph_unicode(const struct vc_data *vc, int n)
{
- struct uni_screen *uniscr = get_vc_uniscr(vc);
+ u32 **uni_lines = vc->vc_uni_lines;
+
+ if (uni_lines)
+ return uni_lines[n / vc->vc_cols][n % vc->vc_cols];
- if (uniscr)
- return uniscr->lines[n / vc->vc_cols][n % vc->vc_cols];
return inverse_translate(vc, screen_glyph(vc, n * 2), true);
}
EXPORT_SYMBOL_GPL(screen_glyph_unicode);
@@ -4789,63 +5037,3 @@ void vcs_scr_updated(struct vc_data *vc)
{
notify_update(vc);
}
-
-void vc_scrolldelta_helper(struct vc_data *c, int lines,
- unsigned int rolled_over, void *base, unsigned int size)
-{
- unsigned long ubase = (unsigned long)base;
- ptrdiff_t scr_end = (void *)c->vc_scr_end - base;
- ptrdiff_t vorigin = (void *)c->vc_visible_origin - base;
- ptrdiff_t origin = (void *)c->vc_origin - base;
- int margin = c->vc_size_row * 4;
- int from, wrap, from_off, avail;
-
- /* Turn scrollback off */
- if (!lines) {
- c->vc_visible_origin = c->vc_origin;
- return;
- }
-
- /* Do we have already enough to allow jumping from 0 to the end? */
- if (rolled_over > scr_end + margin) {
- from = scr_end;
- wrap = rolled_over + c->vc_size_row;
- } else {
- from = 0;
- wrap = size;
- }
-
- from_off = (vorigin - from + wrap) % wrap + lines * c->vc_size_row;
- avail = (origin - from + wrap) % wrap;
-
- /* Only a little piece would be left? Show all incl. the piece! */
- if (avail < 2 * margin)
- margin = 0;
- if (from_off < margin)
- from_off = 0;
- if (from_off > avail - margin)
- from_off = avail;
-
- c->vc_visible_origin = ubase + (from + from_off) % wrap;
-}
-EXPORT_SYMBOL_GPL(vc_scrolldelta_helper);
-
-/*
- * Visible symbols for modules
- */
-
-EXPORT_SYMBOL(color_table);
-EXPORT_SYMBOL(default_red);
-EXPORT_SYMBOL(default_grn);
-EXPORT_SYMBOL(default_blu);
-EXPORT_SYMBOL(update_region);
-EXPORT_SYMBOL(redraw_screen);
-EXPORT_SYMBOL(vc_resize);
-EXPORT_SYMBOL(fg_console);
-EXPORT_SYMBOL(console_blank_hook);
-EXPORT_SYMBOL(console_blanked);
-EXPORT_SYMBOL(vc_cons);
-EXPORT_SYMBOL(global_cursor_default);
-#ifndef VT_SINGLE_DRIVER
-EXPORT_SYMBOL(give_up_console);
-#endif
generated by cgit (git 2.34.1) at 2025-12-25 08:29:48 +0000