Eric Pouech : dbghelp: dwarf: Started parsing the attributes for lines ( in compilation unit).
Module: wine Branch: refs/heads/master Commit: 52db5c094e6c9c7a883c71d996d3aaafa325f0a4 URL: http://source.winehq.org/git/?p=wine.git;a=commit;h=52db5c094e6c9c7a883c71d9... Author: Eric Pouech <eric.pouech(a)wanadoo.fr> Date: Sun Jun 18 21:32:17 2006 +0200 dbghelp: dwarf: Started parsing the attributes for lines (in compilation unit). Walking the whole lot, not doing anything interesting apart from traversing the data. --- dlls/dbghelp/dwarf.c | 146 ++++++++++++++++++++++++++++++++++++++++++++++++++ dlls/dbghelp/dwarf.h | 15 +++++ 2 files changed, 161 insertions(+), 0 deletions(-) diff --git a/dlls/dbghelp/dwarf.c b/dlls/dbghelp/dwarf.c index 12d0226..c7eabdd 100644 --- a/dlls/dbghelp/dwarf.c +++ b/dlls/dbghelp/dwarf.c @@ -1380,6 +1380,147 @@ static void dwarf2_load_one_entry(dwarf2 } } +static void dwarf2_parse_line_numbers(const dwarf2_section_t* sections, + dwarf2_parse_context_t* ctx, + unsigned long offset) +{ + dwarf2_traverse_context_t traverse; + unsigned long length; + unsigned version, header_len, insn_size, default_stmt; + unsigned line_range, opcode_base; + int line_base; + const unsigned char* opcode_len; + + traverse.sections = sections; + traverse.section = section_line; + traverse.data = sections[section_line].address + offset; + traverse.start_data = traverse.data; + traverse.end_data = traverse.data + 4; + traverse.offset = offset; + traverse.word_size = ctx->word_size; + + length = dwarf2_parse_u4(&traverse); + traverse.end_data = traverse.start_data + length; + + version = dwarf2_parse_u2(&traverse); + header_len = dwarf2_parse_u4(&traverse); + insn_size = dwarf2_parse_byte(&traverse); + default_stmt = dwarf2_parse_byte(&traverse); + line_base = (char)dwarf2_parse_byte(&traverse); + line_range = dwarf2_parse_byte(&traverse); + opcode_base = dwarf2_parse_byte(&traverse); + + opcode_len = traverse.data; + traverse.data += opcode_base; + + while (*traverse.data) + { + TRACE("Got include %s\n", (const char*)traverse.data); + traverse.data += strlen((const char *)traverse.data) + 1; + } + traverse.data++; + while (*traverse.data) + { + unsigned int dir_index, mod_time, length; + const char* name; + + name = (const char*)traverse.data; + traverse.data += strlen(name) + 1; + dir_index = dwarf2_leb128_as_unsigned(&traverse); + mod_time = dwarf2_leb128_as_unsigned(&traverse); + length = dwarf2_leb128_as_unsigned(&traverse); + TRACE("Got file %s (%u,%u,%u)\n", + name, dir_index, mod_time, length); + } + traverse.data++; + + while (traverse.data < traverse.end_data) + { + unsigned long address; + unsigned file = 1; + unsigned line = 1; + unsigned is_stmt = default_stmt; + BOOL basic_block = FALSE, end_sequence = FALSE; + unsigned opcode, extopcode, i; + + while (!end_sequence) + { + opcode = dwarf2_parse_byte(&traverse); + TRACE("Got opcode %x\n", opcode); + + if (opcode >= opcode_base) + { + unsigned delta = opcode - opcode_base; + + address += (delta / line_range) * insn_size; + line += line_base + (delta % line_range); + basic_block = TRUE; + } + else + { + switch (opcode) + { + case DW_LNS_copy: + basic_block = FALSE; + break; + case DW_LNS_advance_pc: + address += insn_size * dwarf2_leb128_as_unsigned(&traverse); + break; + case DW_LNS_advance_line: + line += dwarf2_leb128_as_unsigned(&traverse); + break; + case DW_LNS_set_file: + file = dwarf2_leb128_as_signed(&traverse); + break; + case DW_LNS_set_column: + dwarf2_leb128_as_unsigned(&traverse); + break; + case DW_LNS_negate_stmt: + is_stmt = !is_stmt; + break; + case DW_LNS_set_basic_block: + basic_block = 1; + break; + case DW_LNS_const_add_pc: + address += ((255 - opcode_base) / line_range) * insn_size; + break; + case DW_LNS_fixed_advance_pc: + address += dwarf2_parse_u2(&traverse); + break; + case DW_LNS_extended_op: + dwarf2_leb128_as_unsigned(&traverse); + extopcode = dwarf2_parse_byte(&traverse); + switch (extopcode) + { + case DW_LNE_end_sequence: + end_sequence = TRUE; + break; + case DW_LNE_set_address: + address = dwarf2_parse_addr(&traverse); + address += ctx->module->module.BaseOfImage; + break; + case DW_LNE_define_file: + traverse.data += strlen((const char *)traverse.data) + 1; + dwarf2_leb128_as_unsigned(&traverse); + dwarf2_leb128_as_unsigned(&traverse); + dwarf2_leb128_as_unsigned(&traverse); + break; + default: + FIXME("Unsupported extended opcode %x\n", extopcode); + break; + } + break; + default: + WARN("Unsupported opcode %x\n", opcode); + for (i = 0; i < opcode_len[opcode]; i++) + dwarf2_leb128_as_unsigned(&traverse); + break; + } + } + } + } +} + static BOOL dwarf2_parse_compilation_unit(const dwarf2_section_t* sections, const dwarf2_comp_unit_t* comp_unit, struct module* module, @@ -1433,6 +1574,7 @@ static BOOL dwarf2_parse_compilation_uni { union attribute name; dwarf2_debug_info_t** pdi = NULL; + union attribute stmt_list; TRACE("beginning at 0x%lx, for %lu\n", di->offset, di->abbrev->entry_code); @@ -1446,6 +1588,10 @@ static BOOL dwarf2_parse_compilation_uni dwarf2_load_one_entry(&ctx, *pdi, (struct symt_compiland*)di->symt); } } + if (dwarf2_find_attribute(di, DW_AT_stmt_list, &stmt_list)) + { + dwarf2_parse_line_numbers(sections, &ctx, stmt_list.uvalue); + } ret = TRUE; } else FIXME("Should have a compilation unit here\n"); diff --git a/dlls/dbghelp/dwarf.h b/dlls/dbghelp/dwarf.h index 4307720..c03799e 100644 --- a/dlls/dbghelp/dwarf.h +++ b/dlls/dbghelp/dwarf.h @@ -386,3 +386,18 @@ enum dwarf_calling_convention #define DW_CC_lo_user 0x40 #define DW_CC_hi_user 0xff + +#define DW_LNS_extended_op 0x00 +#define DW_LNS_copy 0x01 +#define DW_LNS_advance_pc 0x02 +#define DW_LNS_advance_line 0x03 +#define DW_LNS_set_file 0x04 +#define DW_LNS_set_column 0x05 +#define DW_LNS_negate_stmt 0x06 +#define DW_LNS_set_basic_block 0x07 +#define DW_LNS_const_add_pc 0x08 +#define DW_LNS_fixed_advance_pc 0x09 + +#define DW_LNE_end_sequence 0x01 +#define DW_LNE_set_address 0x02 +#define DW_LNE_define_file 0x03
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Alexandre Julliard