| /* Disassembly display. |
| |
| Copyright 1998, 1999, 2000, 2001, 2002 Free Software Foundation, |
| Inc. |
| |
| Contributed by Hewlett-Packard Company. |
| |
| This file is part of GDB. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| /* FIXME: cagney/2002-02-28: The GDB coding standard indicates that |
| "defs.h" should be included first. Unfortunatly some systems |
| (currently Debian GNU/Linux) include the <stdbool.h> via <curses.h> |
| and they clash with "bfd.h"'s definiton of true/false. The correct |
| fix is to remove true/false from "bfd.h", however, until that |
| happens, hack around it by including "config.h" and <curses.h> |
| first. */ |
| |
| #include "config.h" |
| #ifdef HAVE_NCURSES_H |
| #include <ncurses.h> |
| #else |
| #ifdef HAVE_CURSES_H |
| #include <curses.h> |
| #endif |
| #endif |
| |
| #include "defs.h" |
| #include "symtab.h" |
| #include "breakpoint.h" |
| #include "frame.h" |
| #include "value.h" |
| #include "source.h" |
| |
| #include "tui.h" |
| #include "tuiData.h" |
| #include "tuiWin.h" |
| #include "tuiLayout.h" |
| #include "tuiSourceWin.h" |
| #include "tuiStack.h" |
| #include "tui-file.h" |
| |
| struct tui_asm_line |
| { |
| CORE_ADDR addr; |
| char* addr_string; |
| char* insn; |
| }; |
| |
| /* Function to set the disassembly window's content. |
| Disassemble count lines starting at pc. |
| Return address of the count'th instruction after pc. */ |
| static CORE_ADDR |
| tui_disassemble (struct tui_asm_line* lines, CORE_ADDR pc, int count) |
| { |
| struct ui_file *gdb_dis_out; |
| disassemble_info asm_info; |
| |
| /* now init the ui_file structure */ |
| gdb_dis_out = tui_sfileopen (256); |
| |
| memcpy (&asm_info, TARGET_PRINT_INSN_INFO, sizeof (asm_info)); |
| asm_info.stream = gdb_dis_out; |
| |
| if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG) |
| asm_info.endian = BFD_ENDIAN_BIG; |
| else |
| asm_info.endian = BFD_ENDIAN_LITTLE; |
| |
| if (TARGET_ARCHITECTURE != NULL) |
| asm_info.mach = TARGET_ARCHITECTURE->mach; |
| |
| /* Now construct each line */ |
| for (; count > 0; count--, lines++) |
| { |
| if (lines->addr_string) |
| xfree (lines->addr_string); |
| if (lines->insn) |
| xfree (lines->insn); |
| |
| print_address (pc, gdb_dis_out); |
| lines->addr = pc; |
| lines->addr_string = xstrdup (tui_file_get_strbuf (gdb_dis_out)); |
| |
| ui_file_rewind (gdb_dis_out); |
| |
| pc = pc + TARGET_PRINT_INSN (pc, &asm_info); |
| |
| lines->insn = xstrdup (tui_file_get_strbuf (gdb_dis_out)); |
| |
| /* reset the buffer to empty */ |
| ui_file_rewind (gdb_dis_out); |
| } |
| ui_file_delete (gdb_dis_out); |
| return pc; |
| } |
| |
| /* Find the disassembly address that corresponds to FROM lines |
| above or below the PC. Variable sized instructions are taken |
| into account by the algorithm. */ |
| static CORE_ADDR |
| tui_find_disassembly_address (CORE_ADDR pc, int from) |
| { |
| register CORE_ADDR newLow; |
| int maxLines; |
| int i; |
| struct tui_asm_line* lines; |
| |
| maxLines = (from > 0) ? from : - from; |
| if (maxLines <= 1) |
| return pc; |
| |
| lines = (struct tui_asm_line*) alloca (sizeof (struct tui_asm_line) |
| * maxLines); |
| memset (lines, 0, sizeof (struct tui_asm_line) * maxLines); |
| |
| newLow = pc; |
| if (from > 0) |
| { |
| tui_disassemble (lines, pc, maxLines); |
| newLow = lines[maxLines - 1].addr; |
| } |
| else |
| { |
| CORE_ADDR last_addr; |
| int pos; |
| struct minimal_symbol* msymbol; |
| |
| /* Find backward an address which is a symbol |
| and for which disassembling from that address will fill |
| completely the window. */ |
| pos = maxLines - 1; |
| do { |
| newLow -= 1 * maxLines; |
| msymbol = lookup_minimal_symbol_by_pc_section (newLow, 0); |
| |
| if (msymbol) |
| newLow = SYMBOL_VALUE_ADDRESS (msymbol); |
| else |
| newLow += 1 * maxLines; |
| |
| tui_disassemble (lines, newLow, maxLines); |
| last_addr = lines[pos].addr; |
| } while (last_addr > pc && msymbol); |
| |
| /* Scan forward disassembling one instruction at a time |
| until the last visible instruction of the window |
| matches the pc. We keep the disassembled instructions |
| in the 'lines' window and shift it downward (increasing |
| its addresses). */ |
| if (last_addr < pc) |
| do |
| { |
| CORE_ADDR next_addr; |
| |
| pos++; |
| if (pos >= maxLines) |
| pos = 0; |
| |
| next_addr = tui_disassemble (&lines[pos], last_addr, 1); |
| |
| /* If there are some problems while disassembling exit. */ |
| if (next_addr <= last_addr) |
| break; |
| last_addr = next_addr; |
| } while (last_addr <= pc); |
| pos++; |
| if (pos >= maxLines) |
| pos = 0; |
| newLow = lines[pos].addr; |
| } |
| for (i = 0; i < maxLines; i++) |
| { |
| xfree (lines[i].addr_string); |
| xfree (lines[i].insn); |
| } |
| return newLow; |
| } |
| |
| /* Function to set the disassembly window's content. */ |
| TuiStatus |
| tuiSetDisassemContent (CORE_ADDR pc) |
| { |
| TuiStatus ret = TUI_FAILURE; |
| register int i; |
| register int offset = disassemWin->detail.sourceInfo.horizontalOffset; |
| register int lineWidth, maxLines; |
| CORE_ADDR cur_pc; |
| TuiGenWinInfoPtr locator = locatorWinInfoPtr (); |
| int tab_len = tuiDefaultTabLen (); |
| struct tui_asm_line* lines; |
| int insn_pos; |
| int addr_size, max_size; |
| char* line; |
| |
| if (pc == 0) |
| return TUI_FAILURE; |
| |
| ret = tuiAllocSourceBuffer (disassemWin); |
| if (ret != TUI_SUCCESS) |
| return ret; |
| |
| disassemWin->detail.sourceInfo.startLineOrAddr.addr = pc; |
| cur_pc = (CORE_ADDR) |
| (((TuiWinElementPtr) locator->content[0])->whichElement.locator.addr); |
| |
| maxLines = disassemWin->generic.height - 2; /* account for hilite */ |
| |
| /* Get temporary table that will hold all strings (addr & insn). */ |
| lines = (struct tui_asm_line*) alloca (sizeof (struct tui_asm_line) |
| * maxLines); |
| memset (lines, 0, sizeof (struct tui_asm_line) * maxLines); |
| |
| lineWidth = disassemWin->generic.width - 1; |
| |
| tui_disassemble (lines, pc, maxLines); |
| |
| /* See what is the maximum length of an address and of a line. */ |
| addr_size = 0; |
| max_size = 0; |
| for (i = 0; i < maxLines; i++) |
| { |
| size_t len = strlen (lines[i].addr_string); |
| if (len > addr_size) |
| addr_size = len; |
| |
| len = strlen (lines[i].insn) + tab_len; |
| if (len > max_size) |
| max_size = len; |
| } |
| max_size += addr_size + tab_len; |
| |
| /* Allocate memory to create each line. */ |
| line = (char*) alloca (max_size); |
| insn_pos = (1 + (addr_size / tab_len)) * tab_len; |
| |
| /* Now construct each line */ |
| for (i = 0; i < maxLines; i++) |
| { |
| TuiWinElementPtr element; |
| TuiSourceElement* src; |
| int curLen; |
| |
| element = (TuiWinElementPtr) disassemWin->generic.content[i]; |
| src = &element->whichElement.source; |
| strcpy (line, lines[i].addr_string); |
| curLen = strlen (line); |
| |
| /* Add spaces to make the instructions start on the same column */ |
| while (curLen < insn_pos) |
| { |
| strcat (line, " "); |
| curLen++; |
| } |
| |
| strcat (line, lines[i].insn); |
| |
| /* Now copy the line taking the offset into account */ |
| if (strlen (line) > offset) |
| strcpy (src->line, &line[offset]); |
| else |
| src->line[0] = '\0'; |
| |
| src->lineOrAddr.addr = lines[i].addr; |
| src->isExecPoint = lines[i].addr == cur_pc; |
| |
| /* See whether there is a breakpoint installed. */ |
| src->hasBreak = (!src->isExecPoint |
| && breakpoint_here_p (pc) != no_breakpoint_here); |
| |
| xfree (lines[i].addr_string); |
| xfree (lines[i].insn); |
| } |
| disassemWin->generic.contentSize = i; |
| return TUI_SUCCESS; |
| } |
| |
| |
| /* |
| ** tuiShowDisassem(). |
| ** Function to display the disassembly window with disassembled code. |
| */ |
| void |
| tuiShowDisassem (CORE_ADDR startAddr) |
| { |
| struct symtab *s = find_pc_symtab (startAddr); |
| TuiWinInfoPtr winWithFocus = tuiWinWithFocus (); |
| TuiLineOrAddress val; |
| |
| val.addr = startAddr; |
| tuiAddWinToLayout (DISASSEM_WIN); |
| tuiUpdateSourceWindow (disassemWin, s, val, FALSE); |
| /* |
| ** if the focus was in the src win, put it in the asm win, if the |
| ** source view isn't split |
| */ |
| if (currentLayout () != SRC_DISASSEM_COMMAND && winWithFocus == srcWin) |
| tuiSetWinFocusTo (disassemWin); |
| |
| return; |
| } /* tuiShowDisassem */ |
| |
| |
| /* |
| ** tuiShowDisassemAndUpdateSource(). |
| ** Function to display the disassembly window. |
| */ |
| void |
| tuiShowDisassemAndUpdateSource (CORE_ADDR startAddr) |
| { |
| struct symtab_and_line sal; |
| |
| tuiShowDisassem (startAddr); |
| if (currentLayout () == SRC_DISASSEM_COMMAND) |
| { |
| TuiLineOrAddress val; |
| |
| /* |
| ** Update what is in the source window if it is displayed too, |
| ** note that it follows what is in the disassembly window and visa-versa |
| */ |
| sal = find_pc_line (startAddr, 0); |
| val.lineNo = sal.line; |
| tuiUpdateSourceWindow (srcWin, sal.symtab, val, TRUE); |
| if (sal.symtab) |
| { |
| set_current_source_symtab_and_line (&sal); |
| tuiUpdateLocatorFilename (sal.symtab->filename); |
| } |
| else |
| tuiUpdateLocatorFilename ("?"); |
| } |
| |
| return; |
| } /* tuiShowDisassemAndUpdateSource */ |
| |
| /* |
| ** tuiGetBeginAsmAddress(). |
| */ |
| CORE_ADDR |
| tuiGetBeginAsmAddress (void) |
| { |
| TuiGenWinInfoPtr locator; |
| TuiLocatorElementPtr element; |
| CORE_ADDR addr; |
| |
| locator = locatorWinInfoPtr (); |
| element = &((TuiWinElementPtr) locator->content[0])->whichElement.locator; |
| |
| if (element->addr == 0) |
| { |
| struct minimal_symbol *main_symbol; |
| |
| /* Find address of the start of program. |
| Note: this should be language specific. */ |
| main_symbol = lookup_minimal_symbol ("main", NULL, NULL); |
| if (main_symbol == 0) |
| main_symbol = lookup_minimal_symbol ("MAIN", NULL, NULL); |
| if (main_symbol == 0) |
| main_symbol = lookup_minimal_symbol ("_start", NULL, NULL); |
| if (main_symbol) |
| addr = SYMBOL_VALUE_ADDRESS (main_symbol); |
| else |
| addr = 0; |
| } |
| else /* the target is executing */ |
| addr = element->addr; |
| |
| return addr; |
| } /* tuiGetBeginAsmAddress */ |
| |
| /* Determine what the low address will be to display in the TUI's |
| disassembly window. This may or may not be the same as the |
| low address input. */ |
| CORE_ADDR |
| tuiGetLowDisassemblyAddress (CORE_ADDR low, CORE_ADDR pc) |
| { |
| int pos; |
| |
| /* Determine where to start the disassembly so that the pc is about in the |
| middle of the viewport. */ |
| pos = tuiDefaultWinViewportHeight (DISASSEM_WIN, DISASSEM_COMMAND) / 2; |
| pc = tui_find_disassembly_address (pc, -pos); |
| |
| if (pc < low) |
| pc = low; |
| return pc; |
| } |
| |
| /* |
| ** tuiVerticalDisassemScroll(). |
| ** Scroll the disassembly forward or backward vertically |
| */ |
| void |
| tuiVerticalDisassemScroll (TuiScrollDirection scrollDirection, |
| int numToScroll) |
| { |
| if (disassemWin->generic.content != (OpaquePtr) NULL) |
| { |
| CORE_ADDR pc; |
| TuiWinContent content; |
| struct symtab *s; |
| TuiLineOrAddress val; |
| int maxLines, dir; |
| struct symtab_and_line cursal = get_current_source_symtab_and_line (); |
| |
| content = (TuiWinContent) disassemWin->generic.content; |
| if (cursal.symtab == (struct symtab *) NULL) |
| s = find_pc_symtab (deprecated_selected_frame->pc); |
| else |
| s = cursal.symtab; |
| |
| /* account for hilite */ |
| maxLines = disassemWin->generic.height - 2; |
| pc = content[0]->whichElement.source.lineOrAddr.addr; |
| dir = (scrollDirection == FORWARD_SCROLL) ? maxLines : - maxLines; |
| |
| val.addr = tui_find_disassembly_address (pc, dir); |
| tuiUpdateSourceWindowAsIs (disassemWin, s, val, FALSE); |
| } |
| } |