diff options
Diffstat (limited to 'binutils/dwarf.c')
| -rw-r--r-- | binutils/dwarf.c | 1278 |
1 files changed, 661 insertions, 617 deletions
diff --git a/binutils/dwarf.c b/binutils/dwarf.c index 2f877e7..b11169b 100644 --- a/binutils/dwarf.c +++ b/binutils/dwarf.c @@ -2546,37 +2546,33 @@ load_debug_info (void * file) return 0; } -static int -display_debug_lines_raw (struct dwarf_section *section, - unsigned char *data, - unsigned char *end) -{ - unsigned char *start = section->start; - - printf (_("Raw dump of debug contents of section %s:\n\n"), - section->name); +/* Read a DWARF .debug_line section header starting at DATA. + Upon success returns an updated DATA pointer and the LINFO + structure and the END_OF_SEQUENCE pointer will be filled in. + Otherwise returns NULL. */ - while (data < end) - { - DWARF2_Internal_LineInfo linfo; - unsigned char *standard_opcodes; - unsigned char *end_of_sequence; - unsigned char *hdrptr; - unsigned long hdroff; - int initial_length_size; - int offset_size; - int i; +static unsigned char * +read_debug_line_header (struct dwarf_section * section, + unsigned char * data, + unsigned char * end, + DWARF2_Internal_LineInfo * linfo, + unsigned char ** end_of_sequence) +{ + unsigned char *hdrptr; + unsigned int offset_size; + unsigned int initial_length_size; + /* Extract information from the Line Number Program Header. + (section 6.2.4 in the Dwarf3 doc). */ hdrptr = data; - hdroff = hdrptr - start; - /* Check the length of the block. */ - SAFE_BYTE_GET_AND_INC (linfo.li_length, hdrptr, 4, end); + /* Get and check the length of the block. */ + SAFE_BYTE_GET_AND_INC (linfo->li_length, hdrptr, 4, end); - if (linfo.li_length == 0xffffffff) + if (linfo->li_length == 0xffffffff) { /* This section is 64-bit DWARF 3. */ - SAFE_BYTE_GET_AND_INC (linfo.li_length, hdrptr, 8, end); + SAFE_BYTE_GET_AND_INC (linfo->li_length, hdrptr, 8, end); offset_size = 8; initial_length_size = 12; } @@ -2586,315 +2582,381 @@ display_debug_lines_raw (struct dwarf_section *section, initial_length_size = 4; } - if (linfo.li_length + initial_length_size > section->size) + if (linfo->li_length + initial_length_size > section->size) { - warn - (_("The information in section %s appears to be corrupt - the section is too small\n"), - section->name); - return 0; + /* If the length is just a bias against the initial_length_size then + this means that the field has a relocation against it which has not + been applied. (Ie we are dealing with an object file, not a linked + binary). Do not complain but instead assume that the rest of the + section applies to this particular header. */ + if (linfo->li_length == - initial_length_size) + { + linfo->li_length = section->size - initial_length_size; } + else + { + warn (_("The line info appears to be corrupt - " + "the section is too small\n")); + return NULL; + } + } + + /* Get and check the version number. */ + SAFE_BYTE_GET_AND_INC (linfo->li_version, hdrptr, 2, end); - /* Check its version number. */ - SAFE_BYTE_GET_AND_INC (linfo.li_version, hdrptr, 2, end); - if (linfo.li_version != 2 - && linfo.li_version != 3 - && linfo.li_version != 4) + if (linfo->li_version != 2 + && linfo->li_version != 3 + && linfo->li_version != 4) { warn (_("Only DWARF version 2, 3 and 4 line info is currently supported.\n")); - return 0; + return NULL; } - SAFE_BYTE_GET_AND_INC (linfo.li_prologue_length, hdrptr, offset_size, end); - SAFE_BYTE_GET_AND_INC (linfo.li_min_insn_length, hdrptr, 1, end); + SAFE_BYTE_GET_AND_INC (linfo->li_prologue_length, hdrptr, offset_size, end); + SAFE_BYTE_GET_AND_INC (linfo->li_min_insn_length, hdrptr, 1, end); - if (linfo.li_version >= 4) + if (linfo->li_version >= 4) { - SAFE_BYTE_GET_AND_INC (linfo.li_max_ops_per_insn, hdrptr, 1, end); + SAFE_BYTE_GET_AND_INC (linfo->li_max_ops_per_insn, hdrptr, 1, end); - if (linfo.li_max_ops_per_insn == 0) + if (linfo->li_max_ops_per_insn == 0) { warn (_("Invalid maximum operations per insn.\n")); - return 0; + return NULL; } } else - linfo.li_max_ops_per_insn = 1; + linfo->li_max_ops_per_insn = 1; - SAFE_BYTE_GET_AND_INC (linfo.li_default_is_stmt, hdrptr, 1, end); - SAFE_BYTE_GET_AND_INC (linfo.li_line_base, hdrptr, 1, end); - SAFE_BYTE_GET_AND_INC (linfo.li_line_range, hdrptr, 1, end); - SAFE_BYTE_GET_AND_INC (linfo.li_opcode_base, hdrptr, 1, end); + SAFE_BYTE_GET_AND_INC (linfo->li_default_is_stmt, hdrptr, 1, end); + SAFE_BYTE_GET_AND_INC (linfo->li_line_base, hdrptr, 1, end); + SAFE_BYTE_GET_AND_INC (linfo->li_line_range, hdrptr, 1, end); + SAFE_BYTE_GET_AND_INC (linfo->li_opcode_base, hdrptr, 1, end); /* Sign extend the line base field. */ - linfo.li_line_base <<= 24; - linfo.li_line_base >>= 24; - - printf (_(" Offset: 0x%lx\n"), hdroff); - printf (_(" Length: %ld\n"), (long) linfo.li_length); - printf (_(" DWARF Version: %d\n"), linfo.li_version); - printf (_(" Prologue Length: %d\n"), linfo.li_prologue_length); - printf (_(" Minimum Instruction Length: %d\n"), linfo.li_min_insn_length); - if (linfo.li_version >= 4) - printf (_(" Maximum Ops per Instruction: %d\n"), linfo.li_max_ops_per_insn); - printf (_(" Initial value of 'is_stmt': %d\n"), linfo.li_default_is_stmt); - printf (_(" Line Base: %d\n"), linfo.li_line_base); - printf (_(" Line Range: %d\n"), linfo.li_line_range); - printf (_(" Opcode Base: %d\n"), linfo.li_opcode_base); - - end_of_sequence = data + linfo.li_length + initial_length_size; + linfo->li_line_base <<= 24; + linfo->li_line_base >>= 24; - reset_state_machine (linfo.li_default_is_stmt); - - /* Display the contents of the Opcodes table. */ - standard_opcodes = hdrptr; + * end_of_sequence = data + linfo->li_length + initial_length_size; + return hdrptr; +} - printf (_("\n Opcodes:\n")); +static int +display_debug_lines_raw (struct dwarf_section *section, + unsigned char *data, + unsigned char *end) +{ + unsigned char *start = section->start; - for (i = 1; i < linfo.li_opcode_base; i++) - printf (_(" Opcode %d has %d args\n"), i, standard_opcodes[i - 1]); + printf (_("Raw dump of debug contents of section %s:\n\n"), + section->name); - /* Display the contents of the Directory table. */ - data = standard_opcodes + linfo.li_opcode_base - 1; + while (data < end) + { + static DWARF2_Internal_LineInfo saved_linfo; + DWARF2_Internal_LineInfo linfo; + unsigned char *standard_opcodes; + unsigned char *end_of_sequence; + int i; - if (*data == 0) - printf (_("\n The Directory Table is empty.\n")); - else + if (const_strneq (section->name, ".debug_line.")) { - printf (_("\n The Directory Table:\n")); - - while (*data != 0) - { - printf (" %s\n", data); - - data += strnlen ((char *) data, end - data) + 1; - } + /* Sections named .debug_line.<foo> are fragments of a .debug_line + section containing just the Line Number Statements. They are + created by the assembler and intended to be used alongside gcc's + -ffunction-sections command line option. When the linker's + garbage collection decides to discard a .text.<foo> section it + can then also discard the line number information in .debug_line.<foo>. + + Since the section is a fragmnent it does not have the details + needed to fill out a LineInfo structure, so instead we use the + details from the last one we processed. */ + end_of_sequence = end; + standard_opcodes = NULL; + linfo = saved_linfo; + reset_state_machine (linfo.li_default_is_stmt); } - - /* Skip the NUL at the end of the table. */ - data++; - - /* Display the contents of the File Name table. */ - if (*data == 0) - printf (_("\n The File Name Table is empty.\n")); else { - printf (_("\n The File Name Table:\n")); - printf (_(" Entry\tDir\tTime\tSize\tName\n")); + unsigned char * hdrptr; - while (*data != 0) - { - unsigned char *name; - unsigned int bytes_read; + if ((hdrptr = read_debug_line_header (section, data, end, & linfo, + & end_of_sequence)) == NULL) + return 0; - printf (" %d\t", ++state_machine_regs.last_file_entry); - name = data; - data += strnlen ((char *) data, end - data) + 1; + printf (_(" Offset: 0x%lx\n"), (long)(data - start)); + printf (_(" Length: %ld\n"), (long) linfo.li_length); + printf (_(" DWARF Version: %d\n"), linfo.li_version); + printf (_(" Prologue Length: %d\n"), linfo.li_prologue_length); + printf (_(" Minimum Instruction Length: %d\n"), linfo.li_min_insn_length); + if (linfo.li_version >= 4) + printf (_(" Maximum Ops per Instruction: %d\n"), linfo.li_max_ops_per_insn); + printf (_(" Initial value of 'is_stmt': %d\n"), linfo.li_default_is_stmt); + printf (_(" Line Base: %d\n"), linfo.li_line_base); + printf (_(" Line Range: %d\n"), linfo.li_line_range); + printf (_(" Opcode Base: %d\n"), linfo.li_opcode_base); - printf ("%s\t", - dwarf_vmatoa ("u", read_uleb128 (data, & bytes_read, end))); - data += bytes_read; - printf ("%s\t", - dwarf_vmatoa ("u", read_uleb128 (data, & bytes_read, end))); - data += bytes_read; - printf ("%s\t", - dwarf_vmatoa ("u", read_uleb128 (data, & bytes_read, end))); - data += bytes_read; - printf ("%s\n", name); - - if (data == end) - { - warn (_("Corrupt file name table entry\n")); - break; - } - } - } + reset_state_machine (linfo.li_default_is_stmt); - /* Skip the NUL at the end of the table. */ - data++; + /* Display the contents of the Opcodes table. */ + standard_opcodes = hdrptr; - /* Now display the statements. */ - printf (_("\n Line Number Statements:\n")); + printf (_("\n Opcodes:\n")); - while (data < end_of_sequence) - { - unsigned char op_code; - dwarf_signed_vma adv; - dwarf_vma uladv; - unsigned int bytes_read; + for (i = 1; i < linfo.li_opcode_base; i++) + printf (_(" Opcode %d has %d args\n"), i, standard_opcodes[i - 1]); - op_code = *data++; + /* Display the contents of the Directory table. */ + data = standard_opcodes + linfo.li_opcode_base - 1; - if (op_code >= linfo.li_opcode_base) - { - op_code -= linfo.li_opcode_base; - uladv = (op_code / linfo.li_line_range); - if (linfo.li_max_ops_per_insn == 1) - { - uladv *= linfo.li_min_insn_length; - state_machine_regs.address += uladv; - printf (_(" Special opcode %d: " - "advance Address by %s to 0x%s"), - op_code, dwarf_vmatoa ("u", uladv), - dwarf_vmatoa ("x", state_machine_regs.address)); - } - else - { - state_machine_regs.address - += ((state_machine_regs.op_index + uladv) - / linfo.li_max_ops_per_insn) - * linfo.li_min_insn_length; - state_machine_regs.op_index - = (state_machine_regs.op_index + uladv) - % linfo.li_max_ops_per_insn; - printf (_(" Special opcode %d: " - "advance Address by %s to 0x%s[%d]"), - op_code, dwarf_vmatoa ("u", uladv), - dwarf_vmatoa ("x", state_machine_regs.address), - state_machine_regs.op_index); - } - adv = (op_code % linfo.li_line_range) + linfo.li_line_base; - state_machine_regs.line += adv; - printf (_(" and Line by %s to %d\n"), - dwarf_vmatoa ("d", adv), state_machine_regs.line); - } - else switch (op_code) + if (*data == 0) + printf (_("\n The Directory Table is empty.\n")); + else { - case DW_LNS_extended_op: - data += process_extended_line_op (data, linfo.li_default_is_stmt, end); - break; + printf (_("\n The Directory Table:\n")); - case DW_LNS_copy: - printf (_(" Copy\n")); - break; - - case DW_LNS_advance_pc: - uladv = read_uleb128 (data, & bytes_read, end); - data += bytes_read; - if (linfo.li_max_ops_per_insn == 1) + while (*data != 0) { - uladv *= linfo.li_min_insn_length; - state_machine_regs.address += uladv; - printf (_(" Advance PC by %s to 0x%s\n"), - dwarf_vmatoa ("u", uladv), - dwarf_vmatoa ("x", state_machine_regs.address)); - } - else - { - state_machine_regs.address - += ((state_machine_regs.op_index + uladv) - / linfo.li_max_ops_per_insn) - * linfo.li_min_insn_length; - state_machine_regs.op_index - = (state_machine_regs.op_index + uladv) - % linfo.li_max_ops_per_insn; - printf (_(" Advance PC by %s to 0x%s[%d]\n"), - dwarf_vmatoa ("u", uladv), - dwarf_vmatoa ("x", state_machine_regs.address), - state_machine_regs.op_index); + printf (" %s\n", data); + + data += strnlen ((char *) data, end - data) + 1; } - break; + } - case DW_LNS_advance_line: - adv = read_sleb128 (data, & bytes_read, end); - data += bytes_read; - state_machine_regs.line += adv; - printf (_(" Advance Line by %s to %d\n"), - dwarf_vmatoa ("d", adv), - state_machine_regs.line); - break; + /* Skip the NUL at the end of the table. */ + data++; - case DW_LNS_set_file: - adv = read_uleb128 (data, & bytes_read, end); - data += bytes_read; - printf (_(" Set File Name to entry %s in the File Name Table\n"), - dwarf_vmatoa ("d", adv)); - state_machine_regs.file = adv; - break; + /* Display the contents of the File Name table. */ + if (*data == 0) + printf (_("\n The File Name Table is empty.\n")); + else + { + printf (_("\n The File Name Table:\n")); + printf (_(" Entry\tDir\tTime\tSize\tName\n")); - case DW_LNS_set_column: - uladv = read_uleb128 (data, & bytes_read, end); - data += bytes_read; - printf (_(" Set column to %s\n"), - dwarf_vmatoa ("u", uladv)); - state_machine_regs.column = uladv; - break; + while (*data != 0) + { + unsigned char *name; + unsigned int bytes_read; - case DW_LNS_negate_stmt: - adv = state_machine_regs.is_stmt; - adv = ! adv; - printf (_(" Set is_stmt to %s\n"), dwarf_vmatoa ("d", adv)); - state_machine_regs.is_stmt = adv; - break; + printf (" %d\t", ++state_machine_regs.last_file_entry); + name = data; + data += strnlen ((char *) data, end - data) + 1; - case DW_LNS_set_basic_block: - printf (_(" Set basic block\n")); - state_machine_regs.basic_block = 1; - break; + printf ("%s\t", + dwarf_vmatoa ("u", read_uleb128 (data, & bytes_read, end))); + data += bytes_read; + printf ("%s\t", + dwarf_vmatoa ("u", read_uleb128 (data, & bytes_read, end))); + data += bytes_read; + printf ("%s\t", + dwarf_vmatoa ("u", read_uleb128 (data, & bytes_read, end))); + data += bytes_read; + printf ("%s\n", name); - case DW_LNS_const_add_pc: - uladv = ((255 - linfo.li_opcode_base) / linfo.li_line_range); - if (linfo.li_max_ops_per_insn) - { - uladv *= linfo.li_min_insn_length; - state_machine_regs.address += uladv; - printf (_(" Advance PC by constant %s to 0x%s\n"), - dwarf_vmatoa ("u", uladv), - dwarf_vmatoa ("x", state_machine_regs.address)); - } - else - { - state_machine_regs.address - += ((state_machine_regs.op_index + uladv) - / linfo.li_max_ops_per_insn) - * linfo.li_min_insn_length; - state_machine_regs.op_index - = (state_machine_regs.op_index + uladv) - % linfo.li_max_ops_per_insn; - printf (_(" Advance PC by constant %s to 0x%s[%d]\n"), - dwarf_vmatoa ("u", uladv), - dwarf_vmatoa ("x", state_machine_regs.address), - state_machine_regs.op_index); + if (data == end) + { + warn (_("Corrupt file name table entry\n")); + break; + } } - break; - - case DW_LNS_fixed_advance_pc: - SAFE_BYTE_GET_AND_INC (uladv, data, 2, end); - state_machine_regs.address += uladv; - state_machine_regs.op_index = 0; - printf (_(" Advance PC by fixed size amount %s to 0x%s\n"), - dwarf_vmatoa ("u", uladv), - dwarf_vmatoa ("x", state_machine_regs.address)); - break; + } - case DW_LNS_set_prologue_end: - printf (_(" Set prologue_end to true\n")); - break; + /* Skip the NUL at the end of the table. */ + data++; + putchar ('\n'); + saved_linfo = linfo; + } - case DW_LNS_set_epilogue_begin: - printf (_(" Set epilogue_begin to true\n")); - break; + /* Now display the statements. */ + if (data >= end_of_sequence) + printf (_(" No Line Number Statements.\n")); + else + { + printf (_(" Line Number Statements:\n")); - case DW_LNS_set_isa: - uladv = read_uleb128 (data, & bytes_read, end); - data += bytes_read; - printf (_(" Set ISA to %s\n"), dwarf_vmatoa ("u", uladv)); - break; + while (data < end_of_sequence) + { + unsigned char op_code; + dwarf_signed_vma adv; + dwarf_vma uladv; + unsigned int bytes_read; - default: - printf (_(" Unknown opcode %d with operands: "), op_code); + op_code = *data++; - for (i = standard_opcodes[op_code - 1]; i > 0 ; --i) + if (op_code >= linfo.li_opcode_base) { - printf ("0x%s%s", dwarf_vmatoa ("x", read_uleb128 (data, - &bytes_read, end)), - i == 1 ? "" : ", "); - data += bytes_read; + op_code -= linfo.li_opcode_base; + uladv = (op_code / linfo.li_line_range); + if (linfo.li_max_ops_per_insn == 1) + { + uladv *= linfo.li_min_insn_length; + state_machine_regs.address += uladv; + printf (_(" Special opcode %d: " + "advance Address by %s to 0x%s"), + op_code, dwarf_vmatoa ("u", uladv), + dwarf_vmatoa ("x", state_machine_regs.address)); + } + else + { + state_machine_regs.address + += ((state_machine_regs.op_index + uladv) + / linfo.li_max_ops_per_insn) + * linfo.li_min_insn_length; + state_machine_regs.op_index + = (state_machine_regs.op_index + uladv) + % linfo.li_max_ops_per_insn; + printf (_(" Special opcode %d: " + "advance Address by %s to 0x%s[%d]"), + op_code, dwarf_vmatoa ("u", uladv), + dwarf_vmatoa ("x", state_machine_regs.address), + state_machine_regs.op_index); + } + adv = (op_code % linfo.li_line_range) + linfo.li_line_base; + state_machine_regs.line += adv; + printf (_(" and Line by %s to %d\n"), + dwarf_vmatoa ("d", adv), state_machine_regs.line); } - putchar ('\n'); - break; + else switch (op_code) + { + case DW_LNS_extended_op: + data += process_extended_line_op (data, linfo.li_default_is_stmt, end); + break; + + case DW_LNS_copy: + printf (_(" Copy\n")); + break; + + case DW_LNS_advance_pc: + uladv = read_uleb128 (data, & bytes_read, end); + data += bytes_read; + if (linfo.li_max_ops_per_insn == 1) + { + uladv *= linfo.li_min_insn_length; + state_machine_regs.address += uladv; + printf (_(" Advance PC by %s to 0x%s\n"), + dwarf_vmatoa ("u", uladv), + dwarf_vmatoa ("x", state_machine_regs.address)); + } + else + { + state_machine_regs.address + += ((state_machine_regs.op_index + uladv) + / linfo.li_max_ops_per_insn) + * linfo.li_min_insn_length; + state_machine_regs.op_index + = (state_machine_regs.op_index + uladv) + % linfo.li_max_ops_per_insn; + printf (_(" Advance PC by %s to 0x%s[%d]\n"), + dwarf_vmatoa ("u", uladv), + dwarf_vmatoa ("x", state_machine_regs.address), + state_machine_regs.op_index); + } + break; + + case DW_LNS_advance_line: + adv = read_sleb128 (data, & bytes_read, end); + data += bytes_read; + state_machine_regs.line += adv; + printf (_(" Advance Line by %s to %d\n"), + dwarf_vmatoa ("d", adv), + state_machine_regs.line); + break; + + case DW_LNS_set_file: + adv = read_uleb128 (data, & bytes_read, end); + data += bytes_read; + printf (_(" Set File Name to entry %s in the File Name Table\n"), + dwarf_vmatoa ("d", adv)); + state_machine_regs.file = adv; + break; + + case DW_LNS_set_column: + uladv = read_uleb128 (data, & bytes_read, end); + data += bytes_read; + printf (_(" Set column to %s\n"), + dwarf_vmatoa ("u", uladv)); + state_machine_regs.column = uladv; + break; + + case DW_LNS_negate_stmt: + adv = state_machine_regs.is_stmt; + adv = ! adv; + printf (_(" Set is_stmt to %s\n"), dwarf_vmatoa ("d", adv)); + state_machine_regs.is_stmt = adv; + break; + + case DW_LNS_set_basic_block: + printf (_(" Set basic block\n")); + state_machine_regs.basic_block = 1; + break; + + case DW_LNS_const_add_pc: + uladv = ((255 - linfo.li_opcode_base) / linfo.li_line_range); + if (linfo.li_max_ops_per_insn) + { + uladv *= linfo.li_min_insn_length; + state_machine_regs.address += uladv; + printf (_(" Advance PC by constant %s to 0x%s\n"), + dwarf_vmatoa ("u", uladv), + dwarf_vmatoa ("x", state_machine_regs.address)); + } + else + { + state_machine_regs.address + += ((state_machine_regs.op_index + uladv) + / linfo.li_max_ops_per_insn) + * linfo.li_min_insn_length; + state_machine_regs.op_index + = (state_machine_regs.op_index + uladv) + % linfo.li_max_ops_per_insn; + printf (_(" Advance PC by constant %s to 0x%s[%d]\n"), + dwarf_vmatoa ("u", uladv), + dwarf_vmatoa ("x", state_machine_regs.address), + state_machine_regs.op_index); + } + break; + + case DW_LNS_fixed_advance_pc: + SAFE_BYTE_GET_AND_INC (uladv, data, 2, end); + state_machine_regs.address += uladv; + state_machine_regs.op_index = 0; + printf (_(" Advance PC by fixed size amount %s to 0x%s\n"), + dwarf_vmatoa ("u", uladv), + dwarf_vmatoa ("x", state_machine_regs.address)); + break; + + case DW_LNS_set_prologue_end: + printf (_(" Set prologue_end to true\n")); + break; + + case DW_LNS_set_epilogue_begin: + printf (_(" Set epilogue_begin to true\n")); + break; + + case DW_LNS_set_isa: + uladv = read_uleb128 (data, & bytes_read, end); + data += bytes_read; + printf (_(" Set ISA to %s\n"), dwarf_vmatoa ("u", uladv)); + break; + + default: + printf (_(" Unknown opcode %d with operands: "), op_code); + + if (standard_opcodes != NULL) + for (i = standard_opcodes[op_code - 1]; i > 0 ; --i) + { + printf ("0x%s%s", dwarf_vmatoa ("x", read_uleb128 (data, + &bytes_read, end)), + i == 1 ? "" : ", "); + data += bytes_read; + } + putchar ('\n'); + break; + } } + putchar ('\n'); } - putchar ('\n'); } return 1; @@ -2915,6 +2977,8 @@ display_debug_lines_decoded (struct dwarf_section *section, unsigned char *data, unsigned char *end) { + static DWARF2_Internal_LineInfo saved_linfo; + printf (_("Decoded dump of debug contents of section %s:\n\n"), section->name); @@ -2924,183 +2988,142 @@ display_debug_lines_decoded (struct dwarf_section *section, DWARF2_Internal_LineInfo linfo; unsigned char *standard_opcodes; unsigned char *end_of_sequence; - unsigned char *hdrptr; - int initial_length_size; - int offset_size; int i; File_Entry *file_table = NULL; unsigned int n_files = 0; unsigned char **directory_table = NULL; unsigned int n_directories = 0; - hdrptr = data; - - /* Extract information from the Line Number Program Header. - (section 6.2.4 in the Dwarf3 doc). */ - - /* Get the length of this CU's line number information block. */ - SAFE_BYTE_GET_AND_INC (linfo.li_length, hdrptr, 4, end); - - if (linfo.li_length == 0xffffffff) + if (const_strneq (section->name, ".debug_line.")) { - /* This section is 64-bit DWARF 3. */ - SAFE_BYTE_GET_AND_INC (linfo.li_length, hdrptr, 8, end); - offset_size = 8; - initial_length_size = 12; + /* Sections named .debug_line.<foo> are fragments of a .debug_line + section containing just the Line Number Statements. They are + created by the assembler and intended to be used alongside gcc's + -ffunction-sections command line option. When the linker's + garbage collection decides to discard a .text.<foo> section it + can then also discard the line number information in .debug_line.<foo>. + + Since the section is a fragmnent it does not have the details + needed to fill out a LineInfo structure, so instead we use the + details from the last one we processed. */ + end_of_sequence = end; + standard_opcodes = NULL; + linfo = saved_linfo; + reset_state_machine (linfo.li_default_is_stmt); } else { - offset_size = 4; - initial_length_size = 4; - } - - if (linfo.li_length + initial_length_size > section->size) - { - warn (_("The line info appears to be corrupt - " - "the section is too small\n")); - return 0; - } + unsigned char *hdrptr; - /* Get this CU's Line Number Block version number. */ - SAFE_BYTE_GET_AND_INC (linfo.li_version, hdrptr, 2, end); - if (linfo.li_version != 2 - && linfo.li_version != 3 - && linfo.li_version != 4) - { - warn (_("Only DWARF version 2, 3 and 4 line info is currently " - "supported.\n")); - return 0; - } - - SAFE_BYTE_GET_AND_INC (linfo.li_prologue_length, hdrptr, offset_size, end); - SAFE_BYTE_GET_AND_INC (linfo.li_min_insn_length, hdrptr, 1, end); - - if (linfo.li_version >= 4) - { - SAFE_BYTE_GET_AND_INC (linfo.li_max_ops_per_insn, hdrptr, 1, end); - if (linfo.li_max_ops_per_insn == 0) - { - warn (_("Invalid maximum operations per insn.\n")); + if ((hdrptr = read_debug_line_header (section, data, end, & linfo, + & end_of_sequence)) == NULL) return 0; - } - } - else - linfo.li_max_ops_per_insn = 1; - SAFE_BYTE_GET_AND_INC (linfo.li_default_is_stmt, hdrptr, 1, end); - SAFE_BYTE_GET_AND_INC (linfo.li_line_base, hdrptr, 1, end); - SAFE_BYTE_GET_AND_INC (linfo.li_line_range, hdrptr, 1, end); - SAFE_BYTE_GET_AND_INC (linfo.li_opcode_base, hdrptr, 1, end); + reset_state_machine (linfo.li_default_is_stmt); - /* Sign extend the line base field. */ - linfo.li_line_base <<= 24; - linfo.li_line_base >>= 24; + /* Save a pointer to the contents of the Opcodes table. */ + standard_opcodes = hdrptr; - /* Find the end of this CU's Line Number Information Block. */ - end_of_sequence = data + linfo.li_length + initial_length_size; - - reset_state_machine (linfo.li_default_is_stmt); + /* Traverse the Directory table just to count entries. */ + data = standard_opcodes + linfo.li_opcode_base - 1; + if (*data != 0) + { + unsigned char *ptr_directory_table = data; - /* Save a pointer to the contents of the Opcodes table. */ - standard_opcodes = hdrptr; + while (*data != 0) + { + data += strnlen ((char *) data, end - data) + 1; + n_directories++; + } - /* Traverse the Directory table just to count entries. */ - data = standard_opcodes + linfo.li_opcode_base - 1; - if (*data != 0) - { - unsigned char *ptr_directory_table = data; + /* Go through the directory table again to save the directories. */ + directory_table = (unsigned char **) + xmalloc (n_directories * sizeof (unsigned char *)); - while (*data != 0) - { - data += strnlen ((char *) data, end - data) + 1; - n_directories++; + i = 0; + while (*ptr_directory_table != 0) + { + directory_table[i] = ptr_directory_table; + ptr_directory_table += strnlen ((char *) ptr_directory_table, + ptr_directory_table - end) + 1; + i++; + } } + /* Skip the NUL at the end of the table. */ + data++; - /* Go through the directory table again to save the directories. */ - directory_table = (unsigned char **) - xmalloc (n_directories * sizeof (unsigned char *)); + /* Traverse the File Name table just to count the entries. */ + if (*data != 0) + { + unsigned char *ptr_file_name_table = data; - i = 0; - while (*ptr_directory_table != 0) - { - directory_table[i] = ptr_directory_table; - ptr_directory_table += strnlen ((char *) ptr_directory_table, - ptr_directory_table - end) + 1; - i++; - } - } - /* Skip the NUL at the end of the table. */ - data++; + while (*data != 0) + { + unsigned int bytes_read; - /* Traverse the File Name table just to count the entries. */ - if (*data != 0) - { - unsigned char *ptr_file_name_table = data; + /* Skip Name, directory index, last modification time and length + of file. */ + data += strnlen ((char *) data, end - data) + 1; + read_uleb128 (data, & bytes_read, end); + data += bytes_read; + read_uleb128 (data, & bytes_read, end); + data += bytes_read; + read_uleb128 (data, & bytes_read, end); + data += bytes_read; - while (*data != 0) - { - unsigned int bytes_read; + n_files++; + } - /* Skip Name, directory index, last modification time and length - of file. */ - data += strnlen ((char *) data, end - data) + 1; - read_uleb128 (data, & bytes_read, end); - data += bytes_read; - read_uleb128 (data, & bytes_read, end); - data += bytes_read; - read_uleb128 (data, & bytes_read, end); - data += bytes_read; - - n_files++; - } + /* Go through the file table again to save the strings. */ + file_table = (File_Entry *) xmalloc (n_files * sizeof (File_Entry)); - /* Go through the file table again to save the strings. */ - file_table = (File_Entry *) xmalloc (n_files * sizeof (File_Entry)); + i = 0; + while (*ptr_file_name_table != 0) + { + unsigned int bytes_read; + + file_table[i].name = ptr_file_name_table; + ptr_file_name_table += strnlen ((char *) ptr_file_name_table, + end - ptr_file_name_table) + 1; + + /* We are not interested in directory, time or size. */ + file_table[i].directory_index = read_uleb128 (ptr_file_name_table, + & bytes_read, end); + ptr_file_name_table += bytes_read; + file_table[i].modification_date = read_uleb128 (ptr_file_name_table, + & bytes_read, end); + ptr_file_name_table += bytes_read; + file_table[i].length = read_uleb128 (ptr_file_name_table, & bytes_read, end); + ptr_file_name_table += bytes_read; + i++; + } + i = 0; - i = 0; - while (*ptr_file_name_table != 0) - { - unsigned int bytes_read; - - file_table[i].name = ptr_file_name_table; - ptr_file_name_table += strnlen ((char *) ptr_file_name_table, - end - ptr_file_name_table) + 1; - - /* We are not interested in directory, time or size. */ - file_table[i].directory_index = read_uleb128 (ptr_file_name_table, - & bytes_read, end); - ptr_file_name_table += bytes_read; - file_table[i].modification_date = read_uleb128 (ptr_file_name_table, - & bytes_read, end); - ptr_file_name_table += bytes_read; - file_table[i].length = read_uleb128 (ptr_file_name_table, & bytes_read, end); - ptr_file_name_table += bytes_read; - i++; - } - i = 0; + /* Print the Compilation Unit's name and a header. */ + if (directory_table == NULL) + { + printf (_("CU: %s:\n"), file_table[0].name); + printf (_("File name Line number Starting address\n")); + } + else + { + unsigned int ix = file_table[0].directory_index; + const char *directory = ix ? (char *)directory_table[ix - 1] : "."; - /* Print the Compilation Unit's name and a header. */ - if (directory_table == NULL) - { - printf (_("CU: %s:\n"), file_table[0].name); - printf (_("File name Line number Starting address\n")); - } - else - { - unsigned int ix = file_table[0].directory_index; - const char *directory = ix ? (char *)directory_table[ix - 1] : "."; + if (do_wide || strlen (directory) < 76) + printf (_("CU: %s/%s:\n"), directory, file_table[0].name); + else + printf ("%s:\n", file_table[0].name); - if (do_wide || strlen (directory) < 76) - printf (_("CU: %s/%s:\n"), directory, file_table[0].name); - else - printf ("%s:\n", file_table[0].name); + printf (_("File name Line number Starting address\n")); + } + } - printf (_("File name Line number Starting address\n")); - } - } + /* Skip the NUL at the end of the table. */ + data++; - /* Skip the NUL at the end of the table. */ - data++; + saved_linfo = linfo; + } /* This loop iterates through the Dwarf Line Number Program. */ while (data < end_of_sequence) @@ -3127,10 +3150,10 @@ display_debug_lines_decoded (struct dwarf_section *section, state_machine_regs.address += ((state_machine_regs.op_index + uladv) / linfo.li_max_ops_per_insn) - * linfo.li_min_insn_length; + * linfo.li_min_insn_length; state_machine_regs.op_index = (state_machine_regs.op_index + uladv) - % linfo.li_max_ops_per_insn; + % linfo.li_max_ops_per_insn; } adv = (op_code % linfo.li_line_range) + linfo.li_line_base; @@ -3138,190 +3161,193 @@ display_debug_lines_decoded (struct dwarf_section *section, is_special_opcode = 1; } else switch (op_code) - { - case DW_LNS_extended_op: - { - unsigned int ext_op_code_len; - unsigned char ext_op_code; - unsigned char *op_code_data = data; - - ext_op_code_len = read_uleb128 (op_code_data, &bytes_read, - end_of_sequence); - op_code_data += bytes_read; - - if (ext_op_code_len == 0) - { - warn (_("badly formed extended line op encountered!\n")); - break; - } - ext_op_code_len += bytes_read; - ext_op_code = *op_code_data++; - - switch (ext_op_code) - { - case DW_LNE_end_sequence: - reset_state_machine (linfo.li_default_is_stmt); - break; - case DW_LNE_set_address: - SAFE_BYTE_GET_AND_INC (state_machine_regs.address, - op_code_data, ext_op_code_len - bytes_read - 1, - end); - state_machine_regs.op_index = 0; - break; - case DW_LNE_define_file: - { - file_table = (File_Entry *) xrealloc - (file_table, (n_files + 1) * sizeof (File_Entry)); - - ++state_machine_regs.last_file_entry; - /* Source file name. */ - file_table[n_files].name = op_code_data; - op_code_data += strlen ((char *) op_code_data) + 1; - /* Directory index. */ - file_table[n_files].directory_index = - read_uleb128 (op_code_data, & bytes_read, - end_of_sequence); - op_code_data += bytes_read; - /* Last modification time. */ - file_table[n_files].modification_date = - read_uleb128 (op_code_data, & bytes_read, - end_of_sequence); - op_code_data += bytes_read; - /* File length. */ - file_table[n_files].length = - read_uleb128 (op_code_data, & bytes_read, - end_of_sequence); - - n_files++; - break; - } - case DW_LNE_set_discriminator: - case DW_LNE_HP_set_sequence: - /* Simply ignored. */ - break; - - default: - printf (_("UNKNOWN (%u): length %d\n"), - ext_op_code, ext_op_code_len - bytes_read); - break; - } - data += ext_op_code_len; - break; - } - case DW_LNS_copy: - break; - - case DW_LNS_advance_pc: - uladv = read_uleb128 (data, & bytes_read, end); - data += bytes_read; - if (linfo.li_max_ops_per_insn == 1) - { - uladv *= linfo.li_min_insn_length; - state_machine_regs.address += uladv; - } - else - { - state_machine_regs.address - += ((state_machine_regs.op_index + uladv) - / linfo.li_max_ops_per_insn) - * linfo.li_min_insn_length; - state_machine_regs.op_index - = (state_machine_regs.op_index + uladv) - % linfo.li_max_ops_per_insn; - } - break; - - case DW_LNS_advance_line: - adv = read_sleb128 (data, & bytes_read, end); - data += bytes_read; - state_machine_regs.line += adv; - break; - - case DW_LNS_set_file: - adv = read_uleb128 (data, & bytes_read, end); - data += bytes_read; - state_machine_regs.file = adv; - if (file_table[state_machine_regs.file - 1].directory_index == 0) - { - /* If directory index is 0, that means current directory. */ - printf ("\n./%s:[++]\n", - file_table[state_machine_regs.file - 1].name); - } - else - { - /* The directory index starts counting at 1. */ - printf ("\n%s/%s:\n", - directory_table[file_table[state_machine_regs.file - 1].directory_index - 1], - file_table[state_machine_regs.file - 1].name); - } - break; - - case DW_LNS_set_column: - uladv = read_uleb128 (data, & bytes_read, end); - data += bytes_read; - state_machine_regs.column = uladv; - break; - - case DW_LNS_negate_stmt: - adv = state_machine_regs.is_stmt; - adv = ! adv; - state_machine_regs.is_stmt = adv; - break; - - case DW_LNS_set_basic_block: - state_machine_regs.basic_block = 1; - break; - - case DW_LNS_const_add_pc: - uladv = ((255 - linfo.li_opcode_base) / linfo.li_line_range); - if (linfo.li_max_ops_per_insn == 1) - { - uladv *= linfo.li_min_insn_length; - state_machine_regs.address += uladv; - } - else - { - state_machine_regs.address - += ((state_machine_regs.op_index + uladv) - / linfo.li_max_ops_per_insn) - * linfo.li_min_insn_length; - state_machine_regs.op_index - = (state_machine_regs.op_index + uladv) - % linfo.li_max_ops_per_insn; - } - break; - - case DW_LNS_fixed_advance_pc: - SAFE_BYTE_GET_AND_INC (uladv, data, 2, end); - state_machine_regs.address += uladv; - state_machine_regs.op_index = 0; - break; - - case DW_LNS_set_prologue_end: - break; - - case DW_LNS_set_epilogue_begin: - break; - - case DW_LNS_set_isa: - uladv = read_uleb128 (data, & bytes_read, end); - data += bytes_read; - printf (_(" Set ISA to %lu\n"), uladv); - break; - - default: - printf (_(" Unknown opcode %d with operands: "), op_code); - - for (i = standard_opcodes[op_code - 1]; i > 0 ; --i) - { - printf ("0x%s%s", dwarf_vmatoa ("x", read_uleb128 (data, - &bytes_read, end)), - i == 1 ? "" : ", "); - data += bytes_read; - } - putchar ('\n'); - break; - } + { + case DW_LNS_extended_op: + { + unsigned int ext_op_code_len; + unsigned char ext_op_code; + unsigned char *op_code_data = data; + + ext_op_code_len = read_uleb128 (op_code_data, &bytes_read, + end_of_sequence); + op_code_data += bytes_read; + + if (ext_op_code_len == 0) + { + warn (_("badly formed extended line op encountered!\n")); + break; + } + ext_op_code_len += bytes_read; + ext_op_code = *op_code_data++; + + switch (ext_op_code) + { + case DW_LNE_end_sequence: + reset_state_machine (linfo.li_default_is_stmt); + break; + case DW_LNE_set_address: + SAFE_BYTE_GET_AND_INC (state_machine_regs.address, + op_code_data, ext_op_code_len - bytes_read - 1, + end); + state_machine_regs.op_index = 0; + break; + case DW_LNE_define_file: + { + file_table = (File_Entry *) xrealloc + (file_table, (n_files + 1) * sizeof (File_Entry)); + + ++state_machine_regs.last_file_entry; + /* Source file name. */ + file_table[n_files].name = op_code_data; + op_code_data += strlen ((char *) op_code_data) + 1; + /* Directory index. */ + file_table[n_files].directory_index = + read_uleb128 (op_code_data, & bytes_read, + end_of_sequence); + op_code_data += bytes_read; + /* Last modification time. */ + file_table[n_files].modification_date = + read_uleb128 (op_code_data, & bytes_read, + end_of_sequence); + op_code_data += bytes_read; + /* File length. */ + file_table[n_files].length = + read_uleb128 (op_code_data, & bytes_read, + end_of_sequence); + + n_files++; + break; + } + case DW_LNE_set_discriminator: + case DW_LNE_HP_set_sequence: + /* Simply ignored. */ + break; + + default: + printf (_("UNKNOWN (%u): length %d\n"), + ext_op_code, ext_op_code_len - bytes_read); + break; + } + data += ext_op_code_len; + break; + } + case DW_LNS_copy: + break; + + case DW_LNS_advance_pc: + uladv = read_uleb128 (data, & bytes_read, end); + data += bytes_read; + if (linfo.li_max_ops_per_insn == 1) + { + uladv *= linfo.li_min_insn_length; + state_machine_regs.address += uladv; + } + else + { + state_machine_regs.address + += ((state_machine_regs.op_index + uladv) + / linfo.li_max_ops_per_insn) + * linfo.li_min_insn_length; + state_machine_regs.op_index + = (state_machine_regs.op_index + uladv) + % linfo.li_max_ops_per_insn; + } + break; + + case DW_LNS_advance_line: + adv = read_sleb128 (data, & bytes_read, end); + data += bytes_read; + state_machine_regs.line += adv; + break; + + case DW_LNS_set_file: + adv = read_uleb128 (data, & bytes_read, end); + data += bytes_read; + state_machine_regs.file = adv; + + if (file_table == NULL) + printf (_("\n [Use file table entry %d]\n"), state_machine_regs.file - 1); + else if (file_table[state_machine_regs.file - 1].directory_index == 0) + /* If directory index is 0, that means current directory. */ + printf ("\n./%s:[++]\n", + file_table[state_machine_regs.file - 1].name); + else if (directory_table == NULL) + printf (_("\n [Use directory table entry %d]\n"), + file_table[state_machine_regs.file - 1].directory_index - 1); + else + /* The directory index starts counting at 1. */ + printf ("\n%s/%s:\n", + directory_table[file_table[state_machine_regs.file - 1].directory_index - 1], + file_table[state_machine_regs.file - 1].name); + break; + + case DW_LNS_set_column: + uladv = read_uleb128 (data, & bytes_read, end); + data += bytes_read; + state_machine_regs.column = uladv; + break; + + case DW_LNS_negate_stmt: + adv = state_machine_regs.is_stmt; + adv = ! adv; + state_machine_regs.is_stmt = adv; + break; + + case DW_LNS_set_basic_block: + state_machine_regs.basic_block = 1; + break; + + case DW_LNS_const_add_pc: + uladv = ((255 - linfo.li_opcode_base) / linfo.li_line_range); + if (linfo.li_max_ops_per_insn == 1) + { + uladv *= linfo.li_min_insn_length; + state_machine_regs.address += uladv; + } + else + { + state_machine_regs.address + += ((state_machine_regs.op_index + uladv) + / linfo.li_max_ops_per_insn) + * linfo.li_min_insn_length; + state_machine_regs.op_index + = (state_machine_regs.op_index + uladv) + % linfo.li_max_ops_per_insn; + } + break; + + case DW_LNS_fixed_advance_pc: + SAFE_BYTE_GET_AND_INC (uladv, data, 2, end); + state_machine_regs.address += uladv; + state_machine_regs.op_index = 0; + break; + + case DW_LNS_set_prologue_end: + break; + + case DW_LNS_set_epilogue_begin: + break; + + case DW_LNS_set_isa: + uladv = read_uleb128 (data, & bytes_read, end); + data += bytes_read; + printf (_(" Set ISA to %lu\n"), uladv); + break; + + default: + printf (_(" Unknown opcode %d with operands: "), op_code); + + if (standard_opcodes != NULL) + for (i = standard_opcodes[op_code - 1]; i > 0 ; --i) + { + printf ("0x%s%s", dwarf_vmatoa ("x", read_uleb128 (data, + &bytes_read, end)), + i == 1 ? "" : ", "); + data += bytes_read; + } + putchar ('\n'); + break; + } /* Only Special opcodes, DW_LNS_copy and DW_LNE_end_sequence adds a row to the DWARF address/line matrix. */ @@ -3329,9 +3355,16 @@ display_debug_lines_decoded (struct dwarf_section *section, || (op_code == DW_LNS_copy)) { const unsigned int MAX_FILENAME_LENGTH = 35; - char *fileName = (char *)file_table[state_machine_regs.file - 1].name; + char *fileName; char *newFileName = NULL; - size_t fileNameLength = strlen (fileName); + size_t fileNameLength; + + if (file_table) + fileName = (char *) file_table[state_machine_regs.file - 1].name; + else + fileName = "<unknown>"; + + fileNameLength = strlen (fileName); if ((fileNameLength > MAX_FILENAME_LENGTH) && (!do_wide)) { @@ -3378,10 +3411,21 @@ display_debug_lines_decoded (struct dwarf_section *section, free (newFileName); } } - free (file_table); - file_table = NULL; - free (directory_table); - directory_table = NULL; + + if (file_table) + { + free (file_table); + file_table = NULL; + n_files = 0; + } + + if (directory_table) + { + free (directory_table); + directory_table = NULL; + n_directories = 0; + } + putchar ('\n'); } |