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Diffstat (limited to 'gdb/tui/tui-disasm.c')
| -rw-r--r-- | gdb/tui/tui-disasm.c | 415 |
1 files changed, 415 insertions, 0 deletions
diff --git a/gdb/tui/tui-disasm.c b/gdb/tui/tui-disasm.c new file mode 100644 index 0000000..763d81e --- /dev/null +++ b/gdb/tui/tui-disasm.c @@ -0,0 +1,415 @@ +/* Disassembly display. + + Copyright 1998, 1999, 2000, 2001, 2002, 2003 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. */ + +#include "defs.h" +#include "symtab.h" +#include "breakpoint.h" +#include "frame.h" +#include "value.h" +#include "source.h" +#include "disasm.h" + +#include "tui/tui.h" +#include "tui/tui-data.h" +#include "tui/tui-win.h" +#include "tui/tui-layout.h" +#include "tui/tui-winsource.h" +#include "tui/tui-stack.h" +#include "tui/tui-file.h" + +#ifdef HAVE_NCURSES_H +#include <ncurses.h> +#else +#ifdef HAVE_CURSES_H +#include <curses.h> +#endif +#endif + +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; + + /* now init the ui_file structure */ + gdb_dis_out = tui_sfileopen (256); + + /* 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 + gdb_print_insn (pc, gdb_dis_out); + + 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 (get_frame_pc (deprecated_selected_frame)); + 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); + } +} |