feat: barebones DIE parsing up to code 0x1a
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f172181aaa
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0893dad383
GPG key ID:
DD169F1BA658A5E5
1 changed files with 115 additions and 19 deletions
134
main.cpp
134
main.cpp
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@ -206,6 +206,20 @@ void parse_debuginfo_section(const void *file)
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p+= 8;
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fprintf(stdout, "\t%#x\n", addr_value);
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} break;
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case DW_FORM_block2: // 0x03
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{
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uint16_t length = *(uint16_t*)p;
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p += 2;
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fprintf(stdout, "\t%d byte sized data block\n", length);
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p += length;
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} break;
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case DW_FORM_block4: // 0x04
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{
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uint32_t length = *(uint32_t*)p;
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p += 4;
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fprintf(stdout, "\t%d byte sized data block\n", length);
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p += length;
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} break;
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case DW_FORM_data2: // 0x05
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{
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uint16_t data = *(uint16_t*)p;
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@ -218,7 +232,7 @@ void parse_debuginfo_section(const void *file)
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p += 4;
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fprintf(stdout, "\t%#x\n", data);
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} break;
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case DW_FORM_data8: // 0x06
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case DW_FORM_data8: // 0x07
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{
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uint64_t data = *(uint64_t*)p;
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p += 8;
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@ -230,7 +244,22 @@ void parse_debuginfo_section(const void *file)
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fprintf(stdout, "\t%s\n", p);
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while (*p++);
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} break;
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case DW_FORM_data1: // 0x13
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case DW_FORM_block: // 0x09
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{
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uint64_t length = 0;
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p += decode_leb128((uint8_t*)p, &length);
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fprintf(stdout, "\t%d byte sized data block\n", length);
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p += length;
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while (*p++);
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} break;
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case DW_FORM_block1: // 0x0a
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{
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uint8_t length = *(uint8_t*)p;
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fprintf(stdout, "\t%d byte sized data block\n", length);
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p += length;
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while (*p++);
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} break;
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case DW_FORM_data1: // 0x0b
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{
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uint8_t data = *(uint8_t*)p;
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p += 1;
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@ -239,12 +268,83 @@ void parse_debuginfo_section(const void *file)
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else
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fprintf(stdout, "\t%#x\n", data);
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} break;
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case DW_FORM_ref8:
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case DW_FORM_flag: // 0x0c
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{
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uint64_t data = *(uint64_t*)p;
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uint8_t value = *(uint8_t*)p;
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p += 1;
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fprintf(stdout, "\t%d\n", value);
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} break;
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case DW_FORM_sdata: // 0x0d
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{
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int64_t value;
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p += decode_sleb128((uint8_t*)p, &value);
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fprintf(stdout, "\t%d\n", value);
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} break;
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case DW_FORM_strp: // 0x0e
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{
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// TODO: 32 addresses
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// read offset into .debug_str of desired string
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uint64_t str_offset = *(uint64_t*)p;
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p+= 8;
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uint64_t section_offset = get_offset_of_section(file, ".debug_str");
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char *string = (char*)file + section_offset + str_offset;
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fprintf(stdout, "\t%s\n", string);
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} break;
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case DW_FORM_udata: // 0x0f
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{
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uint64_t value;
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p += decode_leb128((uint8_t*)p, &value);
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fprintf(stdout, "\t%d\n", value);
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} break;
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case DW_FORM_ref_addr: // 0x10
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{
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// TODO: dwarf32
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uint64_t offset = *(uint64_t*)p;
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p += 8;
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fprintf(stdout, "\t%#x\n", data);
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// TODO: fetch the actual value
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fprintf(stdout, "\toffset %#x\n", offset);
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} break;
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case DW_FORM_ref1: // 0x11
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{
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uint8_t offset = *(uint8_t*)p;
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p += 1;
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// TODO: fetch the actual value
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fprintf(stdout, "\toffset %#x\n", offset);
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} break;
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case DW_FORM_ref2: // 0x12
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{
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uint16_t offset = *(uint16_t*)p;
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p += 2;
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// TODO: fetch the actual value
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fprintf(stdout, "\toffset %#x\n", offset);
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} break;
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case DW_FORM_ref4: // 0x13
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{
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uint32_t offset = *(uint32_t*)p;
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p += 4;
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// TODO: fetch the actual value
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fprintf(stdout, "\toffset %#x\n", offset);
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} break;
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case DW_FORM_ref8: // 0x14
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{
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uint64_t offset = *(uint64_t*)p;
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p += 8;
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// TODO: fetch the actual value
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fprintf(stdout, "\t%#x\n", offset);
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} break;
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case DW_FORM_ref_udata: // 0x15
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{
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uint64_t offset;
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p += decode_leb128((uint8_t*)p, &offset);
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// TODO: fetch the actual value
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fprintf(stdout, "\t%#x\n", offset);
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} break;
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case DW_FORM_indirect: // 0x16
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{
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uint64_t form;
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p += decode_leb128((uint8_t*)p, &form);
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// TODO: fetch the actual value
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fprintf(stdout, "\tTODO\n");
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} break;
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case DW_FORM_sec_offset: // 0x17
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{
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@ -266,27 +366,23 @@ void parse_debuginfo_section(const void *file)
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p += length;
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fprintf(stdout, "(%d bytes data)\n", length);
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} break;
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case DW_FORM_flag_present:
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case DW_FORM_flag_present: // 0x19
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{
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// Nothing to read here, flag_present just indicates that a flag is ON. We output '1' just like objdump does
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fprintf(stdout, "\t1\n");
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} break;
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case DW_FORM_implicit_const:
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case DW_FORM_strx: // 0x1a
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{
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uint64_t offset;
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p += decode_leb128((uint8_t*)p, &offset);
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uint64_t section_offset = get_offset_of_section(file, ".debug_str_offsets");
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fprintf(stdout, "\t%s\n", (char*)file + section_offset + offset);
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} break;
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case DW_FORM_implicit_const: // 0x21
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{
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// We already have the value, do not advance the pointer at all
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fprintf(stdout, "\t%#x\n", abbrev_table.specs[code-1][i].value);
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} break;
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case DW_FORM_strp: // 0x0e
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{
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// TODO: 32 addresses
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// read offset into .debug_str of desired string
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uint64_t str_offset = *(uint64_t*)p;
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p+= 8;
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uint64_t section_offset = get_offset_of_section(file, ".debug_str");
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char *string = (char*)file + section_offset + str_offset;
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fprintf(stdout, "\t%s\n", string);
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} break;
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case DW_FORM_line_strp: // 0x1f
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{
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// TODO: 32 addresses
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