| /* Disassemble support for GDB. |
| |
| Copyright (C) 2000-2016 Free Software Foundation, Inc. |
| |
| 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 3 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, see <http://www.gnu.org/licenses/>. */ |
| |
| #include "defs.h" |
| #include "target.h" |
| #include "value.h" |
| #include "ui-out.h" |
| #include "disasm.h" |
| #include "gdbcore.h" |
| #include "dis-asm.h" |
| #include "source.h" |
| #include <algorithm> |
| |
| /* Disassemble functions. |
| FIXME: We should get rid of all the duplicate code in gdb that does |
| the same thing: disassemble_command() and the gdbtk variation. */ |
| |
| /* This structure is used to store line number information for the |
| deprecated /m option. |
| We need a different sort of line table from the normal one cuz we can't |
| depend upon implicit line-end pc's for lines to do the |
| reordering in this function. */ |
| |
| struct deprecated_dis_line_entry |
| { |
| int line; |
| CORE_ADDR start_pc; |
| CORE_ADDR end_pc; |
| }; |
| |
| /* This Structure is used to store line number information. |
| We need a different sort of line table from the normal one cuz we can't |
| depend upon implicit line-end pc's for lines to do the |
| reordering in this function. */ |
| |
| struct dis_line_entry |
| { |
| struct symtab *symtab; |
| int line; |
| }; |
| |
| /* Hash function for dis_line_entry. */ |
| |
| static hashval_t |
| hash_dis_line_entry (const void *item) |
| { |
| const struct dis_line_entry *dle = (const struct dis_line_entry *) item; |
| |
| return htab_hash_pointer (dle->symtab) + dle->line; |
| } |
| |
| /* Equal function for dis_line_entry. */ |
| |
| static int |
| eq_dis_line_entry (const void *item_lhs, const void *item_rhs) |
| { |
| const struct dis_line_entry *lhs = (const struct dis_line_entry *) item_lhs; |
| const struct dis_line_entry *rhs = (const struct dis_line_entry *) item_rhs; |
| |
| return (lhs->symtab == rhs->symtab |
| && lhs->line == rhs->line); |
| } |
| |
| /* Create the table to manage lines for mixed source/disassembly. */ |
| |
| static htab_t |
| allocate_dis_line_table (void) |
| { |
| return htab_create_alloc (41, |
| hash_dis_line_entry, eq_dis_line_entry, |
| xfree, xcalloc, xfree); |
| } |
| |
| /* Add a new dis_line_entry containing SYMTAB and LINE to TABLE. */ |
| |
| static void |
| add_dis_line_entry (htab_t table, struct symtab *symtab, int line) |
| { |
| void **slot; |
| struct dis_line_entry dle, *dlep; |
| |
| dle.symtab = symtab; |
| dle.line = line; |
| slot = htab_find_slot (table, &dle, INSERT); |
| if (*slot == NULL) |
| { |
| dlep = XNEW (struct dis_line_entry); |
| dlep->symtab = symtab; |
| dlep->line = line; |
| *slot = dlep; |
| } |
| } |
| |
| /* Return non-zero if SYMTAB, LINE are in TABLE. */ |
| |
| static int |
| line_has_code_p (htab_t table, struct symtab *symtab, int line) |
| { |
| struct dis_line_entry dle; |
| |
| dle.symtab = symtab; |
| dle.line = line; |
| return htab_find (table, &dle) != NULL; |
| } |
| |
| /* Like target_read_memory, but slightly different parameters. */ |
| static int |
| dis_asm_read_memory (bfd_vma memaddr, gdb_byte *myaddr, unsigned int len, |
| struct disassemble_info *info) |
| { |
| return target_read_code (memaddr, myaddr, len); |
| } |
| |
| /* Like memory_error with slightly different parameters. */ |
| static void |
| dis_asm_memory_error (int err, bfd_vma memaddr, |
| struct disassemble_info *info) |
| { |
| memory_error (TARGET_XFER_E_IO, memaddr); |
| } |
| |
| /* Like print_address with slightly different parameters. */ |
| static void |
| dis_asm_print_address (bfd_vma addr, struct disassemble_info *info) |
| { |
| struct gdbarch *gdbarch = (struct gdbarch *) info->application_data; |
| |
| print_address (gdbarch, addr, (struct ui_file *) info->stream); |
| } |
| |
| static int |
| compare_lines (const void *mle1p, const void *mle2p) |
| { |
| struct deprecated_dis_line_entry *mle1, *mle2; |
| int val; |
| |
| mle1 = (struct deprecated_dis_line_entry *) mle1p; |
| mle2 = (struct deprecated_dis_line_entry *) mle2p; |
| |
| /* End of sequence markers have a line number of 0 but don't want to |
| be sorted to the head of the list, instead sort by PC. */ |
| if (mle1->line == 0 || mle2->line == 0) |
| { |
| val = mle1->start_pc - mle2->start_pc; |
| if (val == 0) |
| val = mle1->line - mle2->line; |
| } |
| else |
| { |
| val = mle1->line - mle2->line; |
| if (val == 0) |
| val = mle1->start_pc - mle2->start_pc; |
| } |
| return val; |
| } |
| |
| /* See disasm.h. */ |
| |
| int |
| gdb_pretty_print_insn (struct gdbarch *gdbarch, struct ui_out *uiout, |
| struct disassemble_info * di, |
| const struct disasm_insn *insn, int flags, |
| struct ui_file *stb) |
| { |
| /* parts of the symbolic representation of the address */ |
| int unmapped; |
| int offset; |
| int line; |
| int size; |
| struct cleanup *ui_out_chain; |
| char *filename = NULL; |
| char *name = NULL; |
| CORE_ADDR pc; |
| |
| ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, NULL); |
| pc = insn->addr; |
| |
| if (insn->number != 0) |
| { |
| ui_out_field_fmt (uiout, "insn-number", "%u", insn->number); |
| ui_out_text (uiout, "\t"); |
| } |
| |
| if ((flags & DISASSEMBLY_SPECULATIVE) != 0) |
| { |
| if (insn->is_speculative) |
| { |
| ui_out_field_string (uiout, "is-speculative", "?"); |
| |
| /* The speculative execution indication overwrites the first |
| character of the PC prefix. |
| We assume a PC prefix length of 3 characters. */ |
| if ((flags & DISASSEMBLY_OMIT_PC) == 0) |
| ui_out_text (uiout, pc_prefix (pc) + 1); |
| else |
| ui_out_text (uiout, " "); |
| } |
| else if ((flags & DISASSEMBLY_OMIT_PC) == 0) |
| ui_out_text (uiout, pc_prefix (pc)); |
| else |
| ui_out_text (uiout, " "); |
| } |
| else if ((flags & DISASSEMBLY_OMIT_PC) == 0) |
| ui_out_text (uiout, pc_prefix (pc)); |
| ui_out_field_core_addr (uiout, "address", gdbarch, pc); |
| |
| if (!build_address_symbolic (gdbarch, pc, 0, &name, &offset, &filename, |
| &line, &unmapped)) |
| { |
| /* We don't care now about line, filename and unmapped. But we might in |
| the future. */ |
| ui_out_text (uiout, " <"); |
| if ((flags & DISASSEMBLY_OMIT_FNAME) == 0) |
| ui_out_field_string (uiout, "func-name", name); |
| ui_out_text (uiout, "+"); |
| ui_out_field_int (uiout, "offset", offset); |
| ui_out_text (uiout, ">:\t"); |
| } |
| else |
| ui_out_text (uiout, ":\t"); |
| |
| if (filename != NULL) |
| xfree (filename); |
| if (name != NULL) |
| xfree (name); |
| |
| ui_file_rewind (stb); |
| if (flags & DISASSEMBLY_RAW_INSN) |
| { |
| CORE_ADDR end_pc; |
| bfd_byte data; |
| int err; |
| const char *spacer = ""; |
| |
| /* Build the opcodes using a temporary stream so we can |
| write them out in a single go for the MI. */ |
| struct ui_file *opcode_stream = mem_fileopen (); |
| struct cleanup *cleanups = |
| make_cleanup_ui_file_delete (opcode_stream); |
| |
| size = gdbarch_print_insn (gdbarch, pc, di); |
| end_pc = pc + size; |
| |
| for (;pc < end_pc; ++pc) |
| { |
| err = (*di->read_memory_func) (pc, &data, 1, di); |
| if (err != 0) |
| (*di->memory_error_func) (err, pc, di); |
| fprintf_filtered (opcode_stream, "%s%02x", |
| spacer, (unsigned) data); |
| spacer = " "; |
| } |
| |
| ui_out_field_stream (uiout, "opcodes", opcode_stream); |
| ui_out_text (uiout, "\t"); |
| |
| do_cleanups (cleanups); |
| } |
| else |
| size = gdbarch_print_insn (gdbarch, pc, di); |
| |
| ui_out_field_stream (uiout, "inst", stb); |
| ui_file_rewind (stb); |
| do_cleanups (ui_out_chain); |
| ui_out_text (uiout, "\n"); |
| |
| return size; |
| } |
| |
| static int |
| dump_insns (struct gdbarch *gdbarch, struct ui_out *uiout, |
| struct disassemble_info * di, |
| CORE_ADDR low, CORE_ADDR high, |
| int how_many, int flags, struct ui_file *stb, |
| CORE_ADDR *end_pc) |
| { |
| struct disasm_insn insn; |
| int num_displayed = 0; |
| |
| memset (&insn, 0, sizeof (insn)); |
| insn.addr = low; |
| |
| while (insn.addr < high && (how_many < 0 || num_displayed < how_many)) |
| { |
| int size; |
| |
| size = gdb_pretty_print_insn (gdbarch, uiout, di, &insn, flags, stb); |
| if (size <= 0) |
| break; |
| |
| ++num_displayed; |
| insn.addr += size; |
| |
| /* Allow user to bail out with ^C. */ |
| QUIT; |
| } |
| |
| if (end_pc != NULL) |
| *end_pc = insn.addr; |
| |
| return num_displayed; |
| } |
| |
| /* The idea here is to present a source-O-centric view of a |
| function to the user. This means that things are presented |
| in source order, with (possibly) out of order assembly |
| immediately following. |
| |
| N.B. This view is deprecated. */ |
| |
| static void |
| do_mixed_source_and_assembly_deprecated |
| (struct gdbarch *gdbarch, struct ui_out *uiout, |
| struct disassemble_info *di, struct symtab *symtab, |
| CORE_ADDR low, CORE_ADDR high, |
| int how_many, int flags, struct ui_file *stb) |
| { |
| int newlines = 0; |
| int nlines; |
| struct linetable_entry *le; |
| struct deprecated_dis_line_entry *mle; |
| struct symtab_and_line sal; |
| int i; |
| int out_of_order = 0; |
| int next_line = 0; |
| int num_displayed = 0; |
| print_source_lines_flags psl_flags = 0; |
| struct cleanup *ui_out_chain; |
| struct cleanup *ui_out_tuple_chain = make_cleanup (null_cleanup, 0); |
| struct cleanup *ui_out_list_chain = make_cleanup (null_cleanup, 0); |
| |
| gdb_assert (symtab != NULL && SYMTAB_LINETABLE (symtab) != NULL); |
| |
| nlines = SYMTAB_LINETABLE (symtab)->nitems; |
| le = SYMTAB_LINETABLE (symtab)->item; |
| |
| if (flags & DISASSEMBLY_FILENAME) |
| psl_flags |= PRINT_SOURCE_LINES_FILENAME; |
| |
| mle = (struct deprecated_dis_line_entry *) |
| alloca (nlines * sizeof (struct deprecated_dis_line_entry)); |
| |
| /* Copy linetable entries for this function into our data |
| structure, creating end_pc's and setting out_of_order as |
| appropriate. */ |
| |
| /* First, skip all the preceding functions. */ |
| |
| for (i = 0; i < nlines - 1 && le[i].pc < low; i++); |
| |
| /* Now, copy all entries before the end of this function. */ |
| |
| for (; i < nlines - 1 && le[i].pc < high; i++) |
| { |
| if (le[i].line == le[i + 1].line && le[i].pc == le[i + 1].pc) |
| continue; /* Ignore duplicates. */ |
| |
| /* Skip any end-of-function markers. */ |
| if (le[i].line == 0) |
| continue; |
| |
| mle[newlines].line = le[i].line; |
| if (le[i].line > le[i + 1].line) |
| out_of_order = 1; |
| mle[newlines].start_pc = le[i].pc; |
| mle[newlines].end_pc = le[i + 1].pc; |
| newlines++; |
| } |
| |
| /* If we're on the last line, and it's part of the function, |
| then we need to get the end pc in a special way. */ |
| |
| if (i == nlines - 1 && le[i].pc < high) |
| { |
| mle[newlines].line = le[i].line; |
| mle[newlines].start_pc = le[i].pc; |
| sal = find_pc_line (le[i].pc, 0); |
| mle[newlines].end_pc = sal.end; |
| newlines++; |
| } |
| |
| /* Now, sort mle by line #s (and, then by addresses within lines). */ |
| |
| if (out_of_order) |
| qsort (mle, newlines, sizeof (struct deprecated_dis_line_entry), |
| compare_lines); |
| |
| /* Now, for each line entry, emit the specified lines (unless |
| they have been emitted before), followed by the assembly code |
| for that line. */ |
| |
| ui_out_chain = make_cleanup_ui_out_list_begin_end (uiout, "asm_insns"); |
| |
| for (i = 0; i < newlines; i++) |
| { |
| /* Print out everything from next_line to the current line. */ |
| if (mle[i].line >= next_line) |
| { |
| if (next_line != 0) |
| { |
| /* Just one line to print. */ |
| if (next_line == mle[i].line) |
| { |
| ui_out_tuple_chain |
| = make_cleanup_ui_out_tuple_begin_end (uiout, |
| "src_and_asm_line"); |
| print_source_lines (symtab, next_line, mle[i].line + 1, psl_flags); |
| } |
| else |
| { |
| /* Several source lines w/o asm instructions associated. */ |
| for (; next_line < mle[i].line; next_line++) |
| { |
| struct cleanup *ui_out_list_chain_line; |
| struct cleanup *ui_out_tuple_chain_line; |
| |
| ui_out_tuple_chain_line |
| = make_cleanup_ui_out_tuple_begin_end (uiout, |
| "src_and_asm_line"); |
| print_source_lines (symtab, next_line, next_line + 1, |
| psl_flags); |
| ui_out_list_chain_line |
| = make_cleanup_ui_out_list_begin_end (uiout, |
| "line_asm_insn"); |
| do_cleanups (ui_out_list_chain_line); |
| do_cleanups (ui_out_tuple_chain_line); |
| } |
| /* Print the last line and leave list open for |
| asm instructions to be added. */ |
| ui_out_tuple_chain |
| = make_cleanup_ui_out_tuple_begin_end (uiout, |
| "src_and_asm_line"); |
| print_source_lines (symtab, next_line, mle[i].line + 1, psl_flags); |
| } |
| } |
| else |
| { |
| ui_out_tuple_chain |
| = make_cleanup_ui_out_tuple_begin_end (uiout, |
| "src_and_asm_line"); |
| print_source_lines (symtab, mle[i].line, mle[i].line + 1, psl_flags); |
| } |
| |
| next_line = mle[i].line + 1; |
| ui_out_list_chain |
| = make_cleanup_ui_out_list_begin_end (uiout, "line_asm_insn"); |
| } |
| |
| num_displayed += dump_insns (gdbarch, uiout, di, |
| mle[i].start_pc, mle[i].end_pc, |
| how_many, flags, stb, NULL); |
| |
| /* When we've reached the end of the mle array, or we've seen the last |
| assembly range for this source line, close out the list/tuple. */ |
| if (i == (newlines - 1) || mle[i + 1].line > mle[i].line) |
| { |
| do_cleanups (ui_out_list_chain); |
| do_cleanups (ui_out_tuple_chain); |
| ui_out_tuple_chain = make_cleanup (null_cleanup, 0); |
| ui_out_list_chain = make_cleanup (null_cleanup, 0); |
| ui_out_text (uiout, "\n"); |
| } |
| if (how_many >= 0 && num_displayed >= how_many) |
| break; |
| } |
| do_cleanups (ui_out_chain); |
| } |
| |
| /* The idea here is to present a source-O-centric view of a |
| function to the user. This means that things are presented |
| in source order, with (possibly) out of order assembly |
| immediately following. */ |
| |
| static void |
| do_mixed_source_and_assembly (struct gdbarch *gdbarch, struct ui_out *uiout, |
| struct disassemble_info *di, |
| struct symtab *main_symtab, |
| CORE_ADDR low, CORE_ADDR high, |
| int how_many, int flags, struct ui_file *stb) |
| { |
| const struct linetable_entry *le, *first_le; |
| int i, nlines; |
| int num_displayed = 0; |
| print_source_lines_flags psl_flags = 0; |
| struct cleanup *cleanups; |
| struct cleanup *ui_out_chain; |
| struct cleanup *ui_out_tuple_chain; |
| struct cleanup *ui_out_list_chain; |
| CORE_ADDR pc; |
| struct symtab *last_symtab; |
| int last_line; |
| htab_t dis_line_table; |
| |
| gdb_assert (main_symtab != NULL && SYMTAB_LINETABLE (main_symtab) != NULL); |
| |
| /* First pass: collect the list of all source files and lines. |
| We do this so that we can only print lines containing code once. |
| We try to print the source text leading up to the next instruction, |
| but if that text is for code that will be disassembled later, then |
| we'll want to defer printing it until later with its associated code. */ |
| |
| dis_line_table = allocate_dis_line_table (); |
| cleanups = make_cleanup_htab_delete (dis_line_table); |
| |
| pc = low; |
| |
| /* The prologue may be empty, but there may still be a line number entry |
| for the opening brace which is distinct from the first line of code. |
| If the prologue has been eliminated find_pc_line may return the source |
| line after the opening brace. We still want to print this opening brace. |
| first_le is used to implement this. */ |
| |
| nlines = SYMTAB_LINETABLE (main_symtab)->nitems; |
| le = SYMTAB_LINETABLE (main_symtab)->item; |
| first_le = NULL; |
| |
| /* Skip all the preceding functions. */ |
| for (i = 0; i < nlines && le[i].pc < low; i++) |
| continue; |
| |
| if (i < nlines && le[i].pc < high) |
| first_le = &le[i]; |
| |
| /* Add lines for every pc value. */ |
| while (pc < high) |
| { |
| struct symtab_and_line sal; |
| int length; |
| |
| sal = find_pc_line (pc, 0); |
| length = gdb_insn_length (gdbarch, pc); |
| pc += length; |
| |
| if (sal.symtab != NULL) |
| add_dis_line_entry (dis_line_table, sal.symtab, sal.line); |
| } |
| |
| /* Second pass: print the disassembly. |
| |
| Output format, from an MI perspective: |
| The result is a ui_out list, field name "asm_insns", where elements have |
| name "src_and_asm_line". |
| Each element is a tuple of source line specs (field names line, file, |
| fullname), and field "line_asm_insn" which contains the disassembly. |
| Field "line_asm_insn" is a list of tuples: address, func-name, offset, |
| opcodes, inst. |
| |
| CLI output works on top of this because MI ignores ui_out_text output, |
| which is where we put file name and source line contents output. |
| |
| Cleanup usage: |
| cleanups: |
| For things created at the beginning of this function and need to be |
| kept until the end of this function. |
| ui_out_chain |
| Handles the outer "asm_insns" list. |
| ui_out_tuple_chain |
| The tuples for each group of consecutive disassemblies. |
| ui_out_list_chain |
| List of consecutive source lines or disassembled insns. */ |
| |
| if (flags & DISASSEMBLY_FILENAME) |
| psl_flags |= PRINT_SOURCE_LINES_FILENAME; |
| |
| ui_out_chain = make_cleanup_ui_out_list_begin_end (uiout, "asm_insns"); |
| |
| ui_out_tuple_chain = NULL; |
| ui_out_list_chain = NULL; |
| |
| last_symtab = NULL; |
| last_line = 0; |
| pc = low; |
| |
| while (pc < high) |
| { |
| struct symtab_and_line sal; |
| CORE_ADDR end_pc; |
| int start_preceding_line_to_display = 0; |
| int end_preceding_line_to_display = 0; |
| int new_source_line = 0; |
| |
| sal = find_pc_line (pc, 0); |
| |
| if (sal.symtab != last_symtab) |
| { |
| /* New source file. */ |
| new_source_line = 1; |
| |
| /* If this is the first line of output, check for any preceding |
| lines. */ |
| if (last_line == 0 |
| && first_le != NULL |
| && first_le->line < sal.line) |
| { |
| start_preceding_line_to_display = first_le->line; |
| end_preceding_line_to_display = sal.line; |
| } |
| } |
| else |
| { |
| /* Same source file as last time. */ |
| if (sal.symtab != NULL) |
| { |
| if (sal.line > last_line + 1 && last_line != 0) |
| { |
| int l; |
| |
| /* Several preceding source lines. Print the trailing ones |
| not associated with code that we'll print later. */ |
| for (l = sal.line - 1; l > last_line; --l) |
| { |
| if (line_has_code_p (dis_line_table, sal.symtab, l)) |
| break; |
| } |
| if (l < sal.line - 1) |
| { |
| start_preceding_line_to_display = l + 1; |
| end_preceding_line_to_display = sal.line; |
| } |
| } |
| if (sal.line != last_line) |
| new_source_line = 1; |
| else |
| { |
| /* Same source line as last time. This can happen, depending |
| on the debug info. */ |
| } |
| } |
| } |
| |
| if (new_source_line) |
| { |
| /* Skip the newline if this is the first instruction. */ |
| if (pc > low) |
| ui_out_text (uiout, "\n"); |
| if (ui_out_tuple_chain != NULL) |
| { |
| gdb_assert (ui_out_list_chain != NULL); |
| do_cleanups (ui_out_list_chain); |
| do_cleanups (ui_out_tuple_chain); |
| } |
| if (sal.symtab != last_symtab |
| && !(flags & DISASSEMBLY_FILENAME)) |
| { |
| /* Remember MI ignores ui_out_text. |
| We don't have to do anything here for MI because MI |
| output includes the source specs for each line. */ |
| if (sal.symtab != NULL) |
| { |
| ui_out_text (uiout, |
| symtab_to_filename_for_display (sal.symtab)); |
| } |
| else |
| ui_out_text (uiout, "unknown"); |
| ui_out_text (uiout, ":\n"); |
| } |
| if (start_preceding_line_to_display > 0) |
| { |
| /* Several source lines w/o asm instructions associated. |
| We need to preserve the structure of the output, so output |
| a bunch of line tuples with no asm entries. */ |
| int l; |
| struct cleanup *ui_out_list_chain_line; |
| struct cleanup *ui_out_tuple_chain_line; |
| |
| gdb_assert (sal.symtab != NULL); |
| for (l = start_preceding_line_to_display; |
| l < end_preceding_line_to_display; |
| ++l) |
| { |
| ui_out_tuple_chain_line |
| = make_cleanup_ui_out_tuple_begin_end (uiout, |
| "src_and_asm_line"); |
| print_source_lines (sal.symtab, l, l + 1, psl_flags); |
| ui_out_list_chain_line |
| = make_cleanup_ui_out_list_begin_end (uiout, |
| "line_asm_insn"); |
| do_cleanups (ui_out_list_chain_line); |
| do_cleanups (ui_out_tuple_chain_line); |
| } |
| } |
| ui_out_tuple_chain |
| = make_cleanup_ui_out_tuple_begin_end (uiout, "src_and_asm_line"); |
| if (sal.symtab != NULL) |
| print_source_lines (sal.symtab, sal.line, sal.line + 1, psl_flags); |
| else |
| ui_out_text (uiout, _("--- no source info for this pc ---\n")); |
| ui_out_list_chain |
| = make_cleanup_ui_out_list_begin_end (uiout, "line_asm_insn"); |
| } |
| else |
| { |
| /* Here we're appending instructions to an existing line. |
| By construction the very first insn will have a symtab |
| and follow the new_source_line path above. */ |
| gdb_assert (ui_out_tuple_chain != NULL); |
| gdb_assert (ui_out_list_chain != NULL); |
| } |
| |
| if (sal.end != 0) |
| end_pc = std::min (sal.end, high); |
| else |
| end_pc = pc + 1; |
| num_displayed += dump_insns (gdbarch, uiout, di, pc, end_pc, |
| how_many, flags, stb, &end_pc); |
| pc = end_pc; |
| |
| if (how_many >= 0 && num_displayed >= how_many) |
| break; |
| |
| last_symtab = sal.symtab; |
| last_line = sal.line; |
| } |
| |
| do_cleanups (ui_out_chain); |
| do_cleanups (cleanups); |
| } |
| |
| static void |
| do_assembly_only (struct gdbarch *gdbarch, struct ui_out *uiout, |
| struct disassemble_info * di, |
| CORE_ADDR low, CORE_ADDR high, |
| int how_many, int flags, struct ui_file *stb) |
| { |
| struct cleanup *ui_out_chain; |
| |
| ui_out_chain = make_cleanup_ui_out_list_begin_end (uiout, "asm_insns"); |
| |
| dump_insns (gdbarch, uiout, di, low, high, how_many, flags, stb, NULL); |
| |
| do_cleanups (ui_out_chain); |
| } |
| |
| /* Initialize the disassemble info struct ready for the specified |
| stream. */ |
| |
| static int ATTRIBUTE_PRINTF (2, 3) |
| fprintf_disasm (void *stream, const char *format, ...) |
| { |
| va_list args; |
| |
| va_start (args, format); |
| vfprintf_filtered ((struct ui_file *) stream, format, args); |
| va_end (args); |
| /* Something non -ve. */ |
| return 0; |
| } |
| |
| struct disassemble_info |
| gdb_disassemble_info (struct gdbarch *gdbarch, struct ui_file *file) |
| { |
| struct disassemble_info di; |
| |
| init_disassemble_info (&di, file, fprintf_disasm); |
| di.flavour = bfd_target_unknown_flavour; |
| di.memory_error_func = dis_asm_memory_error; |
| di.print_address_func = dis_asm_print_address; |
| /* NOTE: cagney/2003-04-28: The original code, from the old Insight |
| disassembler had a local optomization here. By default it would |
| access the executable file, instead of the target memory (there |
| was a growing list of exceptions though). Unfortunately, the |
| heuristic was flawed. Commands like "disassemble &variable" |
| didn't work as they relied on the access going to the target. |
| Further, it has been supperseeded by trust-read-only-sections |
| (although that should be superseeded by target_trust..._p()). */ |
| di.read_memory_func = dis_asm_read_memory; |
| di.arch = gdbarch_bfd_arch_info (gdbarch)->arch; |
| di.mach = gdbarch_bfd_arch_info (gdbarch)->mach; |
| di.endian = gdbarch_byte_order (gdbarch); |
| di.endian_code = gdbarch_byte_order_for_code (gdbarch); |
| di.application_data = gdbarch; |
| disassemble_init_for_target (&di); |
| return di; |
| } |
| |
| void |
| gdb_disassembly (struct gdbarch *gdbarch, struct ui_out *uiout, |
| char *file_string, int flags, int how_many, |
| CORE_ADDR low, CORE_ADDR high) |
| { |
| struct ui_file *stb = mem_fileopen (); |
| struct cleanup *cleanups = make_cleanup_ui_file_delete (stb); |
| struct disassemble_info di = gdb_disassemble_info (gdbarch, stb); |
| struct symtab *symtab; |
| int nlines = -1; |
| |
| /* Assume symtab is valid for whole PC range. */ |
| symtab = find_pc_line_symtab (low); |
| |
| if (symtab != NULL && SYMTAB_LINETABLE (symtab) != NULL) |
| nlines = SYMTAB_LINETABLE (symtab)->nitems; |
| |
| if (!(flags & (DISASSEMBLY_SOURCE_DEPRECATED | DISASSEMBLY_SOURCE)) |
| || nlines <= 0) |
| do_assembly_only (gdbarch, uiout, &di, low, high, how_many, flags, stb); |
| |
| else if (flags & DISASSEMBLY_SOURCE) |
| do_mixed_source_and_assembly (gdbarch, uiout, &di, symtab, low, high, |
| how_many, flags, stb); |
| |
| else if (flags & DISASSEMBLY_SOURCE_DEPRECATED) |
| do_mixed_source_and_assembly_deprecated (gdbarch, uiout, &di, symtab, |
| low, high, how_many, flags, stb); |
| |
| do_cleanups (cleanups); |
| gdb_flush (gdb_stdout); |
| } |
| |
| /* Print the instruction at address MEMADDR in debugged memory, |
| on STREAM. Returns the length of the instruction, in bytes, |
| and, if requested, the number of branch delay slot instructions. */ |
| |
| int |
| gdb_print_insn (struct gdbarch *gdbarch, CORE_ADDR memaddr, |
| struct ui_file *stream, int *branch_delay_insns) |
| { |
| struct disassemble_info di; |
| int length; |
| |
| di = gdb_disassemble_info (gdbarch, stream); |
| length = gdbarch_print_insn (gdbarch, memaddr, &di); |
| if (branch_delay_insns) |
| { |
| if (di.insn_info_valid) |
| *branch_delay_insns = di.branch_delay_insns; |
| else |
| *branch_delay_insns = 0; |
| } |
| return length; |
| } |
| |
| static void |
| do_ui_file_delete (void *arg) |
| { |
| ui_file_delete ((struct ui_file *) arg); |
| } |
| |
| /* Return the length in bytes of the instruction at address MEMADDR in |
| debugged memory. */ |
| |
| int |
| gdb_insn_length (struct gdbarch *gdbarch, CORE_ADDR addr) |
| { |
| static struct ui_file *null_stream = NULL; |
| |
| /* Dummy file descriptor for the disassembler. */ |
| if (!null_stream) |
| { |
| null_stream = ui_file_new (); |
| make_final_cleanup (do_ui_file_delete, null_stream); |
| } |
| |
| return gdb_print_insn (gdbarch, addr, null_stream, NULL); |
| } |
| |
| /* fprintf-function for gdb_buffered_insn_length. This function is a |
| nop, we don't want to print anything, we just want to compute the |
| length of the insn. */ |
| |
| static int ATTRIBUTE_PRINTF (2, 3) |
| gdb_buffered_insn_length_fprintf (void *stream, const char *format, ...) |
| { |
| return 0; |
| } |
| |
| /* Initialize a struct disassemble_info for gdb_buffered_insn_length. */ |
| |
| static void |
| gdb_buffered_insn_length_init_dis (struct gdbarch *gdbarch, |
| struct disassemble_info *di, |
| const gdb_byte *insn, int max_len, |
| CORE_ADDR addr) |
| { |
| init_disassemble_info (di, NULL, gdb_buffered_insn_length_fprintf); |
| |
| /* init_disassemble_info installs buffer_read_memory, etc. |
| so we don't need to do that here. |
| The cast is necessary until disassemble_info is const-ified. */ |
| di->buffer = (gdb_byte *) insn; |
| di->buffer_length = max_len; |
| di->buffer_vma = addr; |
| |
| di->arch = gdbarch_bfd_arch_info (gdbarch)->arch; |
| di->mach = gdbarch_bfd_arch_info (gdbarch)->mach; |
| di->endian = gdbarch_byte_order (gdbarch); |
| di->endian_code = gdbarch_byte_order_for_code (gdbarch); |
| |
| disassemble_init_for_target (di); |
| } |
| |
| /* Return the length in bytes of INSN. MAX_LEN is the size of the |
| buffer containing INSN. */ |
| |
| int |
| gdb_buffered_insn_length (struct gdbarch *gdbarch, |
| const gdb_byte *insn, int max_len, CORE_ADDR addr) |
| { |
| struct disassemble_info di; |
| |
| gdb_buffered_insn_length_init_dis (gdbarch, &di, insn, max_len, addr); |
| |
| return gdbarch_print_insn (gdbarch, addr, &di); |
| } |