| 1 | /* TUI display registers in window. |
| 2 | |
| 3 | Copyright (C) 1998-2019 Free Software Foundation, Inc. |
| 4 | |
| 5 | Contributed by Hewlett-Packard Company. |
| 6 | |
| 7 | This file is part of GDB. |
| 8 | |
| 9 | This program is free software; you can redistribute it and/or modify |
| 10 | it under the terms of the GNU General Public License as published by |
| 11 | the Free Software Foundation; either version 3 of the License, or |
| 12 | (at your option) any later version. |
| 13 | |
| 14 | This program is distributed in the hope that it will be useful, |
| 15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | GNU General Public License for more details. |
| 18 | |
| 19 | You should have received a copy of the GNU General Public License |
| 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 21 | |
| 22 | #include "defs.h" |
| 23 | #include "arch-utils.h" |
| 24 | #include "tui/tui.h" |
| 25 | #include "tui/tui-data.h" |
| 26 | #include "symtab.h" |
| 27 | #include "gdbtypes.h" |
| 28 | #include "gdbcmd.h" |
| 29 | #include "frame.h" |
| 30 | #include "regcache.h" |
| 31 | #include "inferior.h" |
| 32 | #include "target.h" |
| 33 | #include "tui/tui-layout.h" |
| 34 | #include "tui/tui-win.h" |
| 35 | #include "tui/tui-windata.h" |
| 36 | #include "tui/tui-wingeneral.h" |
| 37 | #include "tui/tui-file.h" |
| 38 | #include "tui/tui-regs.h" |
| 39 | #include "tui/tui-io.h" |
| 40 | #include "reggroups.h" |
| 41 | #include "valprint.h" |
| 42 | #include "completer.h" |
| 43 | |
| 44 | #include "gdb_curses.h" |
| 45 | |
| 46 | |
| 47 | /***************************************** |
| 48 | ** STATIC LOCAL FUNCTIONS FORWARD DECLS ** |
| 49 | ******************************************/ |
| 50 | static void |
| 51 | tui_display_register (struct tui_data_element *data, |
| 52 | struct tui_gen_win_info *win_info); |
| 53 | |
| 54 | static enum tui_status tui_show_register_group (struct reggroup *group, |
| 55 | struct frame_info *frame, |
| 56 | int refresh_values_only); |
| 57 | |
| 58 | static enum tui_status tui_get_register (struct frame_info *frame, |
| 59 | struct tui_data_element *data, |
| 60 | int regnum, int *changedp); |
| 61 | |
| 62 | |
| 63 | |
| 64 | /***************************************** |
| 65 | ** PUBLIC FUNCTIONS ** |
| 66 | ******************************************/ |
| 67 | |
| 68 | /* Answer the number of the last line in the regs display. If there |
| 69 | are no registers (-1) is returned. */ |
| 70 | int |
| 71 | tui_last_regs_line_no (void) |
| 72 | { |
| 73 | int num_lines = (-1); |
| 74 | |
| 75 | if (TUI_DATA_WIN->regs_content_count > 0) |
| 76 | { |
| 77 | num_lines = (TUI_DATA_WIN->regs_content_count |
| 78 | / TUI_DATA_WIN->regs_column_count); |
| 79 | if (TUI_DATA_WIN->regs_content_count % TUI_DATA_WIN->regs_column_count) |
| 80 | num_lines++; |
| 81 | } |
| 82 | return num_lines; |
| 83 | } |
| 84 | |
| 85 | |
| 86 | /* Answer the line number that the register element at element_no is |
| 87 | on. If element_no is greater than the number of register elements |
| 88 | there are, -1 is returned. */ |
| 89 | int |
| 90 | tui_line_from_reg_element_no (int element_no) |
| 91 | { |
| 92 | if (element_no < TUI_DATA_WIN->regs_content_count) |
| 93 | { |
| 94 | int i, line = (-1); |
| 95 | |
| 96 | i = 1; |
| 97 | while (line == (-1)) |
| 98 | { |
| 99 | if (element_no < TUI_DATA_WIN->regs_column_count * i) |
| 100 | line = i - 1; |
| 101 | else |
| 102 | i++; |
| 103 | } |
| 104 | |
| 105 | return line; |
| 106 | } |
| 107 | else |
| 108 | return (-1); |
| 109 | } |
| 110 | |
| 111 | |
| 112 | /* Answer the index of the first element in line_no. If line_no is |
| 113 | past the register area (-1) is returned. */ |
| 114 | int |
| 115 | tui_first_reg_element_no_inline (int line_no) |
| 116 | { |
| 117 | if ((line_no * TUI_DATA_WIN->regs_column_count) |
| 118 | <= TUI_DATA_WIN->regs_content_count) |
| 119 | return (((line_no + 1) * TUI_DATA_WIN->regs_column_count) |
| 120 | - TUI_DATA_WIN->regs_column_count); |
| 121 | else |
| 122 | return (-1); |
| 123 | } |
| 124 | |
| 125 | |
| 126 | /* Show the registers of the given group in the data window |
| 127 | and refresh the window. */ |
| 128 | void |
| 129 | tui_show_registers (struct reggroup *group) |
| 130 | { |
| 131 | enum tui_status ret = TUI_FAILURE; |
| 132 | |
| 133 | /* Make sure the curses mode is enabled. */ |
| 134 | tui_enable (); |
| 135 | |
| 136 | /* Make sure the register window is visible. If not, select an |
| 137 | appropriate layout. */ |
| 138 | if (TUI_DATA_WIN == NULL || !TUI_DATA_WIN->generic.is_visible) |
| 139 | tui_set_layout_by_name (DATA_NAME); |
| 140 | |
| 141 | if (group == 0) |
| 142 | group = general_reggroup; |
| 143 | |
| 144 | /* Say that registers should be displayed, even if there is a |
| 145 | problem. */ |
| 146 | TUI_DATA_WIN->display_regs = true; |
| 147 | |
| 148 | if (target_has_registers && target_has_stack && target_has_memory) |
| 149 | { |
| 150 | ret = tui_show_register_group (group, get_selected_frame (NULL), |
| 151 | group == TUI_DATA_WIN->current_group); |
| 152 | } |
| 153 | if (ret == TUI_FAILURE) |
| 154 | { |
| 155 | TUI_DATA_WIN->current_group = 0; |
| 156 | tui_erase_data_content (NO_REGS_STRING); |
| 157 | } |
| 158 | else |
| 159 | { |
| 160 | int i; |
| 161 | |
| 162 | /* Clear all notation of changed values. */ |
| 163 | for (i = 0; i < TUI_DATA_WIN->regs_content_count; i++) |
| 164 | { |
| 165 | struct tui_gen_win_info *data_item_win; |
| 166 | struct tui_win_element *win; |
| 167 | |
| 168 | data_item_win = &TUI_DATA_WIN->regs_content[i] |
| 169 | ->which_element.data_window; |
| 170 | win = data_item_win->content[0]; |
| 171 | win->which_element.data.highlight = FALSE; |
| 172 | } |
| 173 | TUI_DATA_WIN->current_group = group; |
| 174 | tui_display_all_data (); |
| 175 | } |
| 176 | } |
| 177 | |
| 178 | |
| 179 | /* Set the data window to display the registers of the register group |
| 180 | using the given frame. Values are refreshed only when |
| 181 | refresh_values_only is TRUE. */ |
| 182 | |
| 183 | static enum tui_status |
| 184 | tui_show_register_group (struct reggroup *group, |
| 185 | struct frame_info *frame, |
| 186 | int refresh_values_only) |
| 187 | { |
| 188 | struct gdbarch *gdbarch = get_frame_arch (frame); |
| 189 | enum tui_status ret = TUI_FAILURE; |
| 190 | int nr_regs; |
| 191 | int allocated_here = FALSE; |
| 192 | int regnum, pos; |
| 193 | char title[80]; |
| 194 | |
| 195 | /* Make a new title showing which group we display. */ |
| 196 | snprintf (title, sizeof (title) - 1, "Register group: %s", |
| 197 | reggroup_name (group)); |
| 198 | xfree (TUI_DATA_WIN->generic.title); |
| 199 | TUI_DATA_WIN->generic.title = xstrdup (title); |
| 200 | |
| 201 | /* See how many registers must be displayed. */ |
| 202 | nr_regs = 0; |
| 203 | for (regnum = 0; regnum < gdbarch_num_cooked_regs (gdbarch); regnum++) |
| 204 | { |
| 205 | const char *name; |
| 206 | |
| 207 | /* Must be in the group. */ |
| 208 | if (!gdbarch_register_reggroup_p (gdbarch, regnum, group)) |
| 209 | continue; |
| 210 | |
| 211 | /* If the register name is empty, it is undefined for this |
| 212 | processor, so don't display anything. */ |
| 213 | name = gdbarch_register_name (gdbarch, regnum); |
| 214 | if (name == 0 || *name == '\0') |
| 215 | continue; |
| 216 | |
| 217 | nr_regs++; |
| 218 | } |
| 219 | |
| 220 | if (TUI_DATA_WIN->regs_content_count > 0 && !refresh_values_only) |
| 221 | { |
| 222 | tui_free_data_content (TUI_DATA_WIN->regs_content, |
| 223 | TUI_DATA_WIN->regs_content_count); |
| 224 | TUI_DATA_WIN->regs_content_count = 0; |
| 225 | } |
| 226 | |
| 227 | if (TUI_DATA_WIN->regs_content_count <= 0) |
| 228 | { |
| 229 | TUI_DATA_WIN->regs_content = tui_alloc_content (nr_regs, DATA_WIN); |
| 230 | allocated_here = TRUE; |
| 231 | refresh_values_only = FALSE; |
| 232 | } |
| 233 | |
| 234 | if (TUI_DATA_WIN->regs_content != NULL) |
| 235 | { |
| 236 | if (!refresh_values_only || allocated_here) |
| 237 | { |
| 238 | TUI_DATA_WIN->generic.content = NULL; |
| 239 | TUI_DATA_WIN->generic.content_size = 0; |
| 240 | tui_add_content_elements (&TUI_DATA_WIN->generic, nr_regs); |
| 241 | TUI_DATA_WIN->regs_content = TUI_DATA_WIN->generic.content; |
| 242 | TUI_DATA_WIN->regs_content_count = nr_regs; |
| 243 | } |
| 244 | |
| 245 | /* Now set the register names and values. */ |
| 246 | pos = 0; |
| 247 | for (regnum = 0; regnum < gdbarch_num_cooked_regs (gdbarch); regnum++) |
| 248 | { |
| 249 | struct tui_gen_win_info *data_item_win; |
| 250 | struct tui_data_element *data; |
| 251 | const char *name; |
| 252 | |
| 253 | /* Must be in the group. */ |
| 254 | if (!gdbarch_register_reggroup_p (gdbarch, regnum, group)) |
| 255 | continue; |
| 256 | |
| 257 | /* If the register name is empty, it is undefined for this |
| 258 | processor, so don't display anything. */ |
| 259 | name = gdbarch_register_name (gdbarch, regnum); |
| 260 | if (name == 0 || *name == '\0') |
| 261 | continue; |
| 262 | |
| 263 | data_item_win = |
| 264 | &TUI_DATA_WIN->regs_content[pos]->which_element.data_window; |
| 265 | data = &data_item_win->content[0]->which_element.data; |
| 266 | if (data) |
| 267 | { |
| 268 | if (!refresh_values_only) |
| 269 | { |
| 270 | data->item_no = regnum; |
| 271 | data->name = name; |
| 272 | data->highlight = FALSE; |
| 273 | } |
| 274 | tui_get_register (frame, data, regnum, 0); |
| 275 | } |
| 276 | pos++; |
| 277 | } |
| 278 | |
| 279 | TUI_DATA_WIN->generic.content_size = |
| 280 | TUI_DATA_WIN->regs_content_count + TUI_DATA_WIN->data_content_count; |
| 281 | ret = TUI_SUCCESS; |
| 282 | } |
| 283 | |
| 284 | return ret; |
| 285 | } |
| 286 | |
| 287 | /* Function to display the registers in the content from |
| 288 | 'start_element_no' until the end of the register content or the end |
| 289 | of the display height. No checking for displaying past the end of |
| 290 | the registers is done here. */ |
| 291 | void |
| 292 | tui_display_registers_from (int start_element_no) |
| 293 | { |
| 294 | if (TUI_DATA_WIN->regs_content != NULL |
| 295 | && TUI_DATA_WIN->regs_content_count > 0) |
| 296 | { |
| 297 | int i = start_element_no; |
| 298 | int j, item_win_width, cur_y; |
| 299 | |
| 300 | int max_len = 0; |
| 301 | for (i = 0; i < TUI_DATA_WIN->regs_content_count; i++) |
| 302 | { |
| 303 | struct tui_data_element *data; |
| 304 | struct tui_gen_win_info *data_item_win; |
| 305 | char *p; |
| 306 | int len; |
| 307 | |
| 308 | data_item_win |
| 309 | = &TUI_DATA_WIN->regs_content[i]->which_element.data_window; |
| 310 | data = &data_item_win->content[0]->which_element.data; |
| 311 | len = 0; |
| 312 | p = data->content; |
| 313 | if (p != 0) |
| 314 | while (*p) |
| 315 | { |
| 316 | if (*p++ == '\t') |
| 317 | len = 8 * ((len / 8) + 1); |
| 318 | else |
| 319 | len++; |
| 320 | } |
| 321 | |
| 322 | if (len > max_len) |
| 323 | max_len = len; |
| 324 | } |
| 325 | item_win_width = max_len + 1; |
| 326 | i = start_element_no; |
| 327 | |
| 328 | TUI_DATA_WIN->regs_column_count = |
| 329 | (TUI_DATA_WIN->generic.width - 2) / item_win_width; |
| 330 | if (TUI_DATA_WIN->regs_column_count == 0) |
| 331 | TUI_DATA_WIN->regs_column_count = 1; |
| 332 | item_win_width = |
| 333 | (TUI_DATA_WIN->generic.width - 2) / TUI_DATA_WIN->regs_column_count; |
| 334 | |
| 335 | /* Now create each data "sub" window, and write the display into |
| 336 | it. */ |
| 337 | cur_y = 1; |
| 338 | while (i < TUI_DATA_WIN->regs_content_count |
| 339 | && cur_y <= TUI_DATA_WIN->generic.viewport_height) |
| 340 | { |
| 341 | for (j = 0; |
| 342 | j < TUI_DATA_WIN->regs_column_count |
| 343 | && i < TUI_DATA_WIN->regs_content_count; |
| 344 | j++) |
| 345 | { |
| 346 | struct tui_gen_win_info *data_item_win; |
| 347 | struct tui_data_element *data_element_ptr; |
| 348 | |
| 349 | /* Create the window if necessary. */ |
| 350 | data_item_win = &TUI_DATA_WIN->regs_content[i] |
| 351 | ->which_element.data_window; |
| 352 | data_element_ptr = &data_item_win->content[0]->which_element.data; |
| 353 | if (data_item_win->handle != NULL |
| 354 | && (data_item_win->height != 1 |
| 355 | || data_item_win->width != item_win_width |
| 356 | || data_item_win->origin.x != (item_win_width * j) + 1 |
| 357 | || data_item_win->origin.y != cur_y)) |
| 358 | { |
| 359 | tui_delete_win (data_item_win->handle); |
| 360 | data_item_win->handle = 0; |
| 361 | } |
| 362 | |
| 363 | if (data_item_win->handle == NULL) |
| 364 | { |
| 365 | data_item_win->height = 1; |
| 366 | data_item_win->width = item_win_width; |
| 367 | data_item_win->origin.x = (item_win_width * j) + 1; |
| 368 | data_item_win->origin.y = cur_y; |
| 369 | tui_make_window (data_item_win, DONT_BOX_WINDOW); |
| 370 | scrollok (data_item_win->handle, FALSE); |
| 371 | } |
| 372 | touchwin (data_item_win->handle); |
| 373 | |
| 374 | /* Get the printable representation of the register |
| 375 | and display it. */ |
| 376 | tui_display_register (data_element_ptr, data_item_win); |
| 377 | i++; /* Next register. */ |
| 378 | } |
| 379 | cur_y++; /* Next row. */ |
| 380 | } |
| 381 | } |
| 382 | } |
| 383 | |
| 384 | |
| 385 | /* Function to display the registers in the content from |
| 386 | 'start_element_no' on 'start_line_no' until the end of the register |
| 387 | content or the end of the display height. This function checks |
| 388 | that we won't display off the end of the register display. */ |
| 389 | static void |
| 390 | tui_display_reg_element_at_line (int start_element_no, |
| 391 | int start_line_no) |
| 392 | { |
| 393 | if (TUI_DATA_WIN->regs_content != NULL |
| 394 | && TUI_DATA_WIN->regs_content_count > 0) |
| 395 | { |
| 396 | int element_no = start_element_no; |
| 397 | |
| 398 | if (start_element_no != 0 && start_line_no != 0) |
| 399 | { |
| 400 | int last_line_no, first_line_on_last_page; |
| 401 | |
| 402 | last_line_no = tui_last_regs_line_no (); |
| 403 | first_line_on_last_page |
| 404 | = last_line_no - (TUI_DATA_WIN->generic.height - 2); |
| 405 | if (first_line_on_last_page < 0) |
| 406 | first_line_on_last_page = 0; |
| 407 | |
| 408 | /* If there is no other data displayed except registers, and |
| 409 | the element_no causes us to scroll past the end of the |
| 410 | registers, adjust what element to really start the |
| 411 | display at. */ |
| 412 | if (TUI_DATA_WIN->data_content_count <= 0 |
| 413 | && start_line_no > first_line_on_last_page) |
| 414 | element_no |
| 415 | = tui_first_reg_element_no_inline (first_line_on_last_page); |
| 416 | } |
| 417 | tui_display_registers_from (element_no); |
| 418 | } |
| 419 | } |
| 420 | |
| 421 | |
| 422 | |
| 423 | /* Function to display the registers starting at line line_no in the |
| 424 | data window. Answers the line number that the display actually |
| 425 | started from. If nothing is displayed (-1) is returned. */ |
| 426 | int |
| 427 | tui_display_registers_from_line (int line_no, |
| 428 | int force_display) |
| 429 | { |
| 430 | if (TUI_DATA_WIN->regs_content_count > 0) |
| 431 | { |
| 432 | int line, element_no; |
| 433 | |
| 434 | if (line_no < 0) |
| 435 | line = 0; |
| 436 | else if (force_display) |
| 437 | { /* If we must display regs (force_display is true), then |
| 438 | make sure that we don't display off the end of the |
| 439 | registers. */ |
| 440 | if (line_no >= tui_last_regs_line_no ()) |
| 441 | { |
| 442 | if ((line = tui_line_from_reg_element_no ( |
| 443 | TUI_DATA_WIN->regs_content_count - 1)) < 0) |
| 444 | line = 0; |
| 445 | } |
| 446 | else |
| 447 | line = line_no; |
| 448 | } |
| 449 | else |
| 450 | line = line_no; |
| 451 | |
| 452 | element_no = tui_first_reg_element_no_inline (line); |
| 453 | if (element_no |
| 454 | < TUI_DATA_WIN->regs_content_count) |
| 455 | tui_display_reg_element_at_line (element_no, line); |
| 456 | else |
| 457 | line = (-1); |
| 458 | |
| 459 | return line; |
| 460 | } |
| 461 | |
| 462 | return (-1); /* Nothing was displayed. */ |
| 463 | } |
| 464 | |
| 465 | |
| 466 | /* This function check all displayed registers for changes in values, |
| 467 | given a particular frame. If the values have changed, they are |
| 468 | updated with the new value and highlighted. */ |
| 469 | void |
| 470 | tui_check_register_values (struct frame_info *frame) |
| 471 | { |
| 472 | if (TUI_DATA_WIN != NULL |
| 473 | && TUI_DATA_WIN->generic.is_visible) |
| 474 | { |
| 475 | if (TUI_DATA_WIN->regs_content_count <= 0 |
| 476 | && TUI_DATA_WIN->display_regs) |
| 477 | tui_show_registers (TUI_DATA_WIN->current_group); |
| 478 | else |
| 479 | { |
| 480 | int i; |
| 481 | |
| 482 | for (i = 0; (i < TUI_DATA_WIN->regs_content_count); i++) |
| 483 | { |
| 484 | struct tui_data_element *data; |
| 485 | struct tui_gen_win_info *data_item_win_ptr; |
| 486 | int was_hilighted; |
| 487 | |
| 488 | data_item_win_ptr = &TUI_DATA_WIN->regs_content[i]-> |
| 489 | which_element.data_window; |
| 490 | data = &data_item_win_ptr->content[0]->which_element.data; |
| 491 | was_hilighted = data->highlight; |
| 492 | |
| 493 | tui_get_register (frame, data, |
| 494 | data->item_no, &data->highlight); |
| 495 | |
| 496 | if (data->highlight || was_hilighted) |
| 497 | { |
| 498 | tui_display_register (data, data_item_win_ptr); |
| 499 | } |
| 500 | } |
| 501 | } |
| 502 | } |
| 503 | } |
| 504 | |
| 505 | /* Display a register in a window. If hilite is TRUE, then the value |
| 506 | will be displayed in reverse video. */ |
| 507 | static void |
| 508 | tui_display_register (struct tui_data_element *data, |
| 509 | struct tui_gen_win_info *win_info) |
| 510 | { |
| 511 | if (win_info->handle != NULL) |
| 512 | { |
| 513 | int i; |
| 514 | |
| 515 | if (data->highlight) |
| 516 | /* We ignore the return value, casting it to void in order to avoid |
| 517 | a compiler warning. The warning itself was introduced by a patch |
| 518 | to ncurses 5.7 dated 2009-08-29, changing this macro to expand |
| 519 | to code that causes the compiler to generate an unused-value |
| 520 | warning. */ |
| 521 | (void) wstandout (win_info->handle); |
| 522 | |
| 523 | wmove (win_info->handle, 0, 0); |
| 524 | for (i = 1; i < win_info->width; i++) |
| 525 | waddch (win_info->handle, ' '); |
| 526 | wmove (win_info->handle, 0, 0); |
| 527 | if (data->content) |
| 528 | waddstr (win_info->handle, data->content); |
| 529 | |
| 530 | if (data->highlight) |
| 531 | /* We ignore the return value, casting it to void in order to avoid |
| 532 | a compiler warning. The warning itself was introduced by a patch |
| 533 | to ncurses 5.7 dated 2009-08-29, changing this macro to expand |
| 534 | to code that causes the compiler to generate an unused-value |
| 535 | warning. */ |
| 536 | (void) wstandend (win_info->handle); |
| 537 | tui_refresh_win (win_info); |
| 538 | } |
| 539 | } |
| 540 | |
| 541 | /* Helper for "tui reg next", wraps a call to REGGROUP_NEXT, but adds wrap |
| 542 | around behaviour. Returns the next register group, or NULL if the |
| 543 | register window is not currently being displayed. */ |
| 544 | |
| 545 | static struct reggroup * |
| 546 | tui_reg_next (struct gdbarch *gdbarch) |
| 547 | { |
| 548 | struct reggroup *group = NULL; |
| 549 | |
| 550 | if (TUI_DATA_WIN != NULL) |
| 551 | { |
| 552 | group = TUI_DATA_WIN->current_group; |
| 553 | group = reggroup_next (gdbarch, group); |
| 554 | if (group == NULL) |
| 555 | group = reggroup_next (gdbarch, NULL); |
| 556 | } |
| 557 | return group; |
| 558 | } |
| 559 | |
| 560 | /* Helper for "tui reg prev", wraps a call to REGGROUP_PREV, but adds wrap |
| 561 | around behaviour. Returns the previous register group, or NULL if the |
| 562 | register window is not currently being displayed. */ |
| 563 | |
| 564 | static struct reggroup * |
| 565 | tui_reg_prev (struct gdbarch *gdbarch) |
| 566 | { |
| 567 | struct reggroup *group = NULL; |
| 568 | |
| 569 | if (TUI_DATA_WIN != NULL) |
| 570 | { |
| 571 | group = TUI_DATA_WIN->current_group; |
| 572 | group = reggroup_prev (gdbarch, group); |
| 573 | if (group == NULL) |
| 574 | group = reggroup_prev (gdbarch, NULL); |
| 575 | } |
| 576 | return group; |
| 577 | } |
| 578 | |
| 579 | /* Implement the 'tui reg' command. Changes the register group displayed |
| 580 | in the tui register window. Displays the tui register window if it is |
| 581 | not already on display. */ |
| 582 | |
| 583 | static void |
| 584 | tui_reg_command (const char *args, int from_tty) |
| 585 | { |
| 586 | struct gdbarch *gdbarch = get_current_arch (); |
| 587 | |
| 588 | if (args != NULL) |
| 589 | { |
| 590 | struct reggroup *group, *match = NULL; |
| 591 | size_t len = strlen (args); |
| 592 | |
| 593 | /* Make sure the curses mode is enabled. */ |
| 594 | tui_enable (); |
| 595 | |
| 596 | /* Make sure the register window is visible. If not, select an |
| 597 | appropriate layout. We need to do this before trying to run the |
| 598 | 'next' or 'prev' commands. */ |
| 599 | if (TUI_DATA_WIN == NULL || !TUI_DATA_WIN->generic.is_visible) |
| 600 | tui_set_layout_by_name (DATA_NAME); |
| 601 | |
| 602 | if (strncmp (args, "next", len) == 0) |
| 603 | match = tui_reg_next (gdbarch); |
| 604 | else if (strncmp (args, "prev", len) == 0) |
| 605 | match = tui_reg_prev (gdbarch); |
| 606 | |
| 607 | /* This loop matches on the initial part of a register group |
| 608 | name. If this initial part in ARGS matches only one register |
| 609 | group then the switch is made. */ |
| 610 | for (group = reggroup_next (gdbarch, NULL); |
| 611 | group != NULL; |
| 612 | group = reggroup_next (gdbarch, group)) |
| 613 | { |
| 614 | if (strncmp (reggroup_name (group), args, len) == 0) |
| 615 | { |
| 616 | if (match != NULL) |
| 617 | error (_("ambiguous register group name '%s'"), args); |
| 618 | match = group; |
| 619 | } |
| 620 | } |
| 621 | |
| 622 | if (match == NULL) |
| 623 | error (_("unknown register group '%s'"), args); |
| 624 | |
| 625 | tui_show_registers (match); |
| 626 | } |
| 627 | else |
| 628 | { |
| 629 | struct reggroup *group; |
| 630 | int first; |
| 631 | |
| 632 | printf_unfiltered (_("\"tui reg\" must be followed by the name of " |
| 633 | "either a register group,\nor one of 'next' " |
| 634 | "or 'prev'. Known register groups are:\n")); |
| 635 | |
| 636 | for (first = 1, group = reggroup_next (gdbarch, NULL); |
| 637 | group != NULL; |
| 638 | first = 0, group = reggroup_next (gdbarch, group)) |
| 639 | { |
| 640 | if (!first) |
| 641 | printf_unfiltered (", "); |
| 642 | printf_unfiltered ("%s", reggroup_name (group)); |
| 643 | } |
| 644 | |
| 645 | printf_unfiltered ("\n"); |
| 646 | } |
| 647 | } |
| 648 | |
| 649 | /* Complete names of register groups, and add the special "prev" and "next" |
| 650 | names. */ |
| 651 | |
| 652 | static void |
| 653 | tui_reggroup_completer (struct cmd_list_element *ignore, |
| 654 | completion_tracker &tracker, |
| 655 | const char *text, const char *word) |
| 656 | { |
| 657 | static const char *extra[] = { "next", "prev", NULL }; |
| 658 | size_t len = strlen (word); |
| 659 | const char **tmp; |
| 660 | |
| 661 | reggroup_completer (ignore, tracker, text, word); |
| 662 | |
| 663 | /* XXXX use complete_on_enum instead? */ |
| 664 | for (tmp = extra; *tmp != NULL; ++tmp) |
| 665 | { |
| 666 | if (strncmp (word, *tmp, len) == 0) |
| 667 | tracker.add_completion (make_unique_xstrdup (*tmp)); |
| 668 | } |
| 669 | } |
| 670 | |
| 671 | void |
| 672 | _initialize_tui_regs (void) |
| 673 | { |
| 674 | struct cmd_list_element **tuicmd, *cmd; |
| 675 | |
| 676 | tuicmd = tui_get_cmd_list (); |
| 677 | |
| 678 | cmd = add_cmd ("reg", class_tui, tui_reg_command, _("\ |
| 679 | TUI command to control the register window."), tuicmd); |
| 680 | set_cmd_completer (cmd, tui_reggroup_completer); |
| 681 | } |
| 682 | |
| 683 | |
| 684 | /***************************************** |
| 685 | ** STATIC LOCAL FUNCTIONS ** |
| 686 | ******************************************/ |
| 687 | |
| 688 | /* Get the register from the frame and return a printable |
| 689 | representation of it. */ |
| 690 | |
| 691 | static char * |
| 692 | tui_register_format (struct frame_info *frame, int regnum) |
| 693 | { |
| 694 | struct gdbarch *gdbarch = get_frame_arch (frame); |
| 695 | |
| 696 | string_file stream; |
| 697 | |
| 698 | scoped_restore save_pagination |
| 699 | = make_scoped_restore (&pagination_enabled, 0); |
| 700 | scoped_restore save_stdout |
| 701 | = make_scoped_restore (&gdb_stdout, &stream); |
| 702 | |
| 703 | gdbarch_print_registers_info (gdbarch, &stream, frame, regnum, 1); |
| 704 | |
| 705 | /* Remove the possible \n. */ |
| 706 | std::string &str = stream.string (); |
| 707 | if (!str.empty () && str.back () == '\n') |
| 708 | str.resize (str.size () - 1); |
| 709 | |
| 710 | /* Expand tabs into spaces, since ncurses on MS-Windows doesn't. */ |
| 711 | return tui_expand_tabs (str.c_str (), 0); |
| 712 | } |
| 713 | |
| 714 | /* Get the register value from the given frame and format it for the |
| 715 | display. When changep is set, check if the new register value has |
| 716 | changed with respect to the previous call. */ |
| 717 | static enum tui_status |
| 718 | tui_get_register (struct frame_info *frame, |
| 719 | struct tui_data_element *data, |
| 720 | int regnum, int *changedp) |
| 721 | { |
| 722 | enum tui_status ret = TUI_FAILURE; |
| 723 | |
| 724 | if (changedp) |
| 725 | *changedp = FALSE; |
| 726 | if (target_has_registers) |
| 727 | { |
| 728 | char *prev_content = data->content; |
| 729 | |
| 730 | data->content = tui_register_format (frame, regnum); |
| 731 | |
| 732 | if (changedp != NULL |
| 733 | && strcmp (prev_content, data->content) != 0) |
| 734 | *changedp = 1; |
| 735 | |
| 736 | xfree (prev_content); |
| 737 | |
| 738 | ret = TUI_SUCCESS; |
| 739 | } |
| 740 | return ret; |
| 741 | } |