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raddebugger/src/coff/coff.c
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Henry Goschütz 14759e49e9 Fixed a typo.
2024-07-23 08:33:33 -07:00

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// Copyright (c) 2024 Epic Games Tools
// Licensed under the MIT license (https://opensource.org/license/mit/)
internal B32
coff_is_big_obj(String8 data)
{
B32 is_big_obj = 0;
if (data.size >= sizeof(COFF_HeaderBigObj)) {
COFF_HeaderBigObj *big_header = (COFF_HeaderBigObj*)(data.str);
is_big_obj = big_header->sig1 == COFF_MachineType_UNKNOWN &&
big_header->sig2 == max_U16 &&
big_header->version >= COFF_MIN_BIG_OBJ_VERSION &&
MemoryCompare(big_header->magic, coff_big_obj_magic, sizeof(big_header->magic)) == 0;
}
return is_big_obj;
}
internal B32
coff_is_obj(String8 data)
{
B32 is_obj = 0;
if (data.size >= sizeof(COFF_Header)) {
COFF_Header *header = (COFF_Header*)(data.str);
// validate machine
B32 is_machine_type_valid = 0;
switch (header->machine) {
case COFF_MachineType_UNKNOWN:
case COFF_MachineType_X86: case COFF_MachineType_X64:
case COFF_MachineType_AM33: case COFF_MachineType_ARM:
case COFF_MachineType_ARM64: case COFF_MachineType_ARMNT:
case COFF_MachineType_EBC: case COFF_MachineType_IA64:
case COFF_MachineType_M32R: case COFF_MachineType_MIPS16:
case COFF_MachineType_MIPSFPU:case COFF_MachineType_MIPSFPU16:
case COFF_MachineType_POWERPC:case COFF_MachineType_POWERPCFP:
case COFF_MachineType_R4000: case COFF_MachineType_RISCV32:
case COFF_MachineType_RISCV64:case COFF_MachineType_RISCV128:
case COFF_MachineType_SH3: case COFF_MachineType_SH3DSP:
case COFF_MachineType_SH4: case COFF_MachineType_SH5:
case COFF_MachineType_THUMB: case COFF_MachineType_WCEMIPSV2:
{
is_machine_type_valid = 1;
}break;
}
if (is_machine_type_valid) {
// validate section count
U64 section_count = header->section_count;
U64 section_hdr_opl_off = sizeof(*header) + section_count*sizeof(COFF_SectionHeader);
if (data.size >= section_hdr_opl_off) {
COFF_SectionHeader *section_hdrs = (COFF_SectionHeader*)(data.str + sizeof(*header));
COFF_SectionHeader *section_hdr_opl = section_hdrs + section_count;
// validate section ranges
B32 is_sect_range_valid = 1;
for (COFF_SectionHeader *sec_hdr = section_hdrs;
sec_hdr < section_hdr_opl;
sec_hdr += 1) {
if (!(sec_hdr->flags & COFF_SectionFlag_CNT_UNINITIALIZED_DATA)) {
U64 min = sec_hdr->foff;
U64 max = min + sec_hdr->fsize;
if (sec_hdr->fsize > 0 && !(section_hdr_opl_off <= min && min <= max && max <= data.size)) {
is_sect_range_valid = 0;
break;
}
}
}
if (is_sect_range_valid) {
// validate symbol table
U64 symbol_table_off = header->symbol_table_foff;
U64 symbol_table_size = sizeof(COFF_Symbol16)*header->symbol_count;
U64 symbol_table_opl_off = symbol_table_off + symbol_table_size;
// don't validate symbol table when there is none
if (symbol_table_off == 0 && symbol_table_size == 0) {
symbol_table_off = section_hdr_opl_off;
symbol_table_opl_off = section_hdr_opl_off;
}
is_obj = (section_hdr_opl_off <= symbol_table_off &&
symbol_table_off <= symbol_table_opl_off &&
symbol_table_opl_off <= data.size);
}
}
}
}
return is_obj;
}
internal COFF_HeaderInfo
coff_header_info_from_data(String8 data)
{
COFF_HeaderInfo info = {0};
if (coff_is_big_obj(data)) {
COFF_HeaderBigObj *big_header = (COFF_HeaderBigObj*)data.str;
info.machine = big_header->machine;
info.section_array_off = sizeof(COFF_HeaderBigObj);
info.section_count_no_null = big_header->section_count;
info.string_table_off = big_header->pointer_to_symbol_table + sizeof(COFF_Symbol32) * big_header->number_of_symbols;
info.symbol_size = sizeof(COFF_Symbol32);
info.symbol_off = big_header->pointer_to_symbol_table;
info.symbol_count = big_header->number_of_symbols;
} else if (coff_is_obj(data)) {
COFF_Header *header = (COFF_Header*)data.str;
info.machine = header->machine;
info.section_array_off = sizeof(COFF_Header);
info.section_count_no_null = header->section_count;
info.string_table_off = header->symbol_table_foff + sizeof(COFF_Symbol16) * header->symbol_count;
info.symbol_size = sizeof(COFF_Symbol16);
info.symbol_off = header->symbol_table_foff;
info.symbol_count = header->symbol_count;
}
return info;
}
internal U64
coff_align_size_from_section_flags(COFF_SectionFlags flags)
{
U32 align = 0;
U32 align_index = COFF_SectionFlags_Extract_ALIGN(flags);
switch (align_index) {
default: break;
case 0: align = 1; break; // alignment isn't specified, default to 1
case COFF_SectionAlign_1BYTES: align = 1; break;
case COFF_SectionAlign_2BYTES: align = 2; break;
case COFF_SectionAlign_4BYTES: align = 4; break;
case COFF_SectionAlign_8BYTES: align = 8; break;
case COFF_SectionAlign_16BYTES: align = 16; break;
case COFF_SectionAlign_32BYTES: align = 32; break;
case COFF_SectionAlign_64BYTES: align = 64; break;
case COFF_SectionAlign_128BYTES: align = 128; break;
case COFF_SectionAlign_256BYTES: align = 256; break;
case COFF_SectionAlign_512BYTES: align = 512; break;
case COFF_SectionAlign_1024BYTES: align = 1024; break;
case COFF_SectionAlign_2048BYTES: align = 2048; break;
case COFF_SectionAlign_4096BYTES: align = 4096; break;
case COFF_SectionAlign_8192BYTES: align = 8192; break;
}
return align;
}
internal COFF_SymbolValueInterpType
coff_interp_symbol(COFF_Symbol32 *symbol)
{
if (symbol->storage_class == COFF_SymStorageClass_SECTION && symbol->section_number == COFF_SYMBOL_UNDEFINED_SECTION) {
return COFF_SymbolValueInterp_UNDEFINED;
}
if (symbol->storage_class == COFF_SymStorageClass_EXTERNAL && symbol->value == 0 && symbol->section_number == COFF_SYMBOL_UNDEFINED_SECTION) {
return COFF_SymbolValueInterp_UNDEFINED;
}
if (symbol->storage_class == COFF_SymStorageClass_EXTERNAL && symbol->value != 0 && symbol->section_number == COFF_SYMBOL_UNDEFINED_SECTION) {
return COFF_SymbolValueInterp_COMMON;
}
if (symbol->section_number == COFF_SYMBOL_ABS_SECTION) {
return COFF_SymbolValueInterp_ABS;
}
if (symbol->section_number == COFF_SYMBOL_DEBUG_SECTION) {
return COFF_SymbolValueInterp_DEBUG;
}
if (symbol->storage_class == COFF_SymStorageClass_WEAK_EXTERNAL) {
return COFF_SymbolValueInterp_WEAK;
}
return COFF_SymbolValueInterp_REGULAR;
}
internal U64
coff_foff_from_voff(COFF_SectionHeader *sections, U64 section_count, U64 voff)
{
U64 foff = 0;
for(U64 sect_idx = 0; sect_idx < section_count; sect_idx += 1)
{
COFF_SectionHeader *sect = &sections[sect_idx];
if(sect->voff <= voff && voff < sect->voff+sect->vsize)
{
if(!(sect->flags & COFF_SectionFlag_CNT_UNINITIALIZED_DATA))
{
foff = sect->foff + (voff - sect->voff);
}
break;
}
}
return foff;
}
internal COFF_SectionHeader *
coff_section_header_from_num(String8 data, U64 section_headers_off, U64 n)
{
COFF_SectionHeader *result = &coff_section_header_nil;
if(1 <= n && section_headers_off + n*sizeof(COFF_SectionHeader) <= data.size)
{
result = (COFF_SectionHeader*)(data.str + section_headers_off + (n-1)*sizeof(COFF_SectionHeader));
}
return result;
}
internal String8
coff_section_header_get_name(COFF_SectionHeader *header, String8 coff_data, U64 string_table_base)
{
U64 size = 0;
for (; size < sizeof(header->name); size += 1) {
if (header->name[size] == '\0') {
break;
}
}
String8 name = str8(header->name, size);
if (name.str[0] == '/') {
String8 ascii_name_offset = str8_skip(name, 1);
U64 name_offset = u64_from_str8(ascii_name_offset, 10);
name_offset += string_table_base;
if (name_offset < coff_data.size) {
char *ptr = (char *)coff_data.str + name_offset;
name = str8_cstring(ptr);
}
}
return name;
}
internal void
coff_parse_section_name(String8 full_name, String8 *name_out, String8 *postfix_out)
{
// dollar sign has multiple interpretations that depend on the type of the section.
// 1. when section contains code/data it indicates section precedence
// 2. when section starts with .debug it indicates type of data inside the section
// T: Types
// S: Symbols
// P: Precompiled types
// F: FPO data
// H: Clang extension produced with /debug:ghash, array of type hashes
*name_out = full_name;
*postfix_out = str8_lit("");
for (U64 i = 0; i < full_name.size; ++i) {
if (full_name.str[i] == '$') {
*name_out = str8(full_name.str, i);
*postfix_out = str8(full_name.str + i + 1, full_name.size - i - 1);
// TLS sections don't have a postfix but we still have to sort them based
// on dollar sign so they are sloted between CRT's _tls_start and _tls_end sections.
if (str8_match(*name_out, str8_lit(".tls"), 0) && postfix_out->size == 0) {
*postfix_out = str8_lit("$");
}
break;
}
}
}
internal COFF_RelocNode *
coff_reloc_list_push(Arena *arena, COFF_RelocList *list, COFF_Reloc reloc)
{
COFF_RelocNode *node = push_array(arena, COFF_RelocNode, 1);
node->data = reloc;
SLLQueuePush(list->first, list->last, node);
++list->count;
return node;
}
////////////////////////////////
internal String8
coff_read_symbol_name(String8 data, U64 string_table_base_offset, COFF_SymbolName *name)
{
String8 name_str = str8_lit("");
if (name->long_name.zeroes == 0) {
U64 string_table_offset = string_table_base_offset + name->long_name.string_table_offset;
str8_deserial_read_cstr(data, string_table_offset, &name_str);
} else {
U32 i;
for (i = 0; i < sizeof(name->short_name); ++i) {
if (name->short_name[i] == '\0') {
break;
}
}
name_str = str8(name->short_name, i);
}
return name_str;
}
internal void
coff_symbol32_from_coff_symbol16(COFF_Symbol32 *sym32, COFF_Symbol16 *sym16)
{
sym32->name = sym16->name;
sym32->value = sym16->value;
if (sym16->section_number == COFF_SYMBOL_DEBUG_SECTION_16) {
sym32->section_number = COFF_SYMBOL_DEBUG_SECTION;
} else if (sym16->section_number == COFF_SYMBOL_ABS_SECTION_16) {
sym32->section_number = COFF_SYMBOL_ABS_SECTION;
} else {
sym32->section_number = (U32)sym16->section_number;
}
sym32->type.v = sym16->type.v;
sym32->storage_class = sym16->storage_class;
sym32->aux_symbol_count = sym16->aux_symbol_count;
}
internal COFF_Symbol32Array
coff_symbol_array_from_data_16(Arena *arena, String8 data, U64 symbol_array_off, U64 symbol_count)
{
COFF_Symbol32Array result;
result.count = symbol_count;
result.v = push_array_no_zero_aligned(arena, COFF_Symbol32, result.count, 8);
COFF_Symbol16 *sym16_arr = (COFF_Symbol16 *)(data.str + symbol_array_off);
for (U64 isymbol = 0; isymbol < symbol_count; isymbol += 1) {
// read header symbol
COFF_Symbol16 *sym16 = &sym16_arr[isymbol];
// convert to 32bit
COFF_Symbol32 *sym32 = &result.v[isymbol];
coff_symbol32_from_coff_symbol16(sym32, sym16);
if (isymbol + 1 + sym16->aux_symbol_count > symbol_count) {
Assert(!"aux symbols out of bounds");
}
// copy aux symbols
for (U64 iaux = 0; iaux < sym16->aux_symbol_count; iaux += 1) {
COFF_Symbol16 *aux16 = sym16 + iaux + 1;
COFF_Symbol32 *aux32 = sym32 + iaux + 1; // 32bit COFF uses 16bit aux symbols
MemoryCopy(aux32, aux16, sizeof(COFF_Symbol16));
}
// take into account aux symbols
isymbol += sym32->aux_symbol_count;
}
return result;
}
internal COFF_Symbol32Array
coff_symbol_array_from_data_32(Arena *arena, String8 data, U64 symbol_array_off, U64 symbol_count)
{
COFF_Symbol32Array result;
result.count = symbol_count;
result.v = (COFF_Symbol32 *)(data.str + symbol_array_off);
return result;
}
internal COFF_Symbol32Array
coff_symbol_array_from_data(Arena *arena, String8 data, U64 symbol_off, U64 symbol_count, U64 symbol_size)
{
COFF_Symbol32Array result = {0};
switch (symbol_size) {
case sizeof(COFF_Symbol16): result = coff_symbol_array_from_data_16(arena, data, symbol_off, symbol_count); break;
case sizeof(COFF_Symbol32): result = coff_symbol_array_from_data_32(arena, data, symbol_off, symbol_count); break;
}
return result;
}
internal COFF_Symbol16Node *
coff_symbol16_list_push(Arena *arena, COFF_Symbol16List *list, COFF_Symbol16 symbol)
{
COFF_Symbol16Node *node = push_array(arena, COFF_Symbol16Node, 1);
node->next = 0;
node->data = symbol;
SLLQueuePush(list->first, list->last, node);
list->count += 1;
return node;
}
internal COFF_RelocInfo
coff_reloc_info_from_section_header(String8 data, COFF_SectionHeader *header)
{
COFF_RelocInfo result = {0};
if (header->flags & COFF_SectionFlag_LNK_NRELOC_OVFL && header->reloc_count == max_U16) {
COFF_Reloc counter;
U64 read_size = str8_deserial_read_struct(data, header->relocs_foff, &counter);
if (read_size == sizeof(counter) && counter.apply_off > 0) {
result.array_off = header->relocs_foff + sizeof(COFF_Reloc);
result.count = counter.apply_off - 1; // exclude counter entry
}
} else {
result.array_off = header->relocs_foff;
result.count = header->reloc_count;
}
return result;
}
internal U64
coff_word_size_from_machine(COFF_MachineType machine)
{
U64 result = 0;
switch (machine) {
case COFF_MachineType_X64: result = 8; break;
case COFF_MachineType_X86: result = 4; break;
}
return result;
}
internal String8
coff_make_import_lookup(Arena *arena, U16 hint, String8 name)
{
U64 buffer_size = sizeof(hint) + (name.size + 1);
U8 *buffer = push_array(arena, U8, buffer_size);
*(U16*)buffer = hint;
MemoryCopy(buffer + sizeof(hint), name.str, name.size);
buffer[buffer_size - 1] = 0;
String8 result = str8(buffer, buffer_size);
return result;
}
internal U32
coff_make_ordinal_32(U16 hint)
{
U32 ordinal = (1 << 31) | hint;
return ordinal;
}
internal U64
coff_make_ordinal_64(U16 hint)
{
U64 ordinal = (1ULL << 63) | hint;
return ordinal;
}
////////////////////////////////
internal B32
coff_resource_id_is_equal(COFF_ResourceID a, COFF_ResourceID b)
{
B32 is_equal = 0;
if (a.type == b.type) {
switch (a.type) {
case COFF_ResourceIDType_NULL: break;
case COFF_ResourceIDType_NUMBER: is_equal = (a.u.number == b.u.number); break;
case COFF_ResourceIDType_STRING: is_equal = str8_match(a.u.string, b.u.string, 0); break;
default: Assert(!"invalid resource id type");
}
}
return is_equal;
}
internal COFF_ResourceID
coff_resource_id_copy(Arena *arena, COFF_ResourceID id)
{
COFF_ResourceID result = zero_struct;
switch (id.type) {
case COFF_ResourceIDType_NULL: break;
case COFF_ResourceIDType_NUMBER: {
result.type = COFF_ResourceIDType_NUMBER;
result.u.number = id.u.number;
} break;
case COFF_ResourceIDType_STRING: {
result.type = COFF_ResourceIDType_STRING;
result.u.string = id.u.string;
} break;
default: Assert(!"invalid resource id type");
}
return result;
}
internal COFF_ResourceID
coff_convert_resource_id(Arena *arena, COFF_ResourceID_16 *id_16)
{
COFF_ResourceID id;
id.type = id_16->type;
switch (id_16->type) {
case COFF_ResourceIDType_NULL: break;
case COFF_ResourceIDType_NUMBER: {
id.u.number = id_16->u.number;
} break;
case COFF_ResourceIDType_STRING: {
id.u.string = str8_from_16(arena, id_16->u.string);
} break;
default: Assert(!"invalid resource id type");
}
return id;
}
internal U64
coff_read_resource_id(String8 data, U64 off, COFF_ResourceID_16 *id_out)
{
U64 cursor = off;
U16 flag = 0;
str8_deserial_read_struct(data, cursor, &flag);
B32 is_number = flag == max_U16;
if (is_number) {
cursor += sizeof(flag);
id_out->type = COFF_ResourceIDType_NUMBER;
cursor += str8_deserial_read_struct(data, cursor, &id_out->u.number);
} else {
id_out->type = COFF_ResourceIDType_STRING;
cursor += str8_deserial_read_windows_utf16_string16(data, cursor, &id_out->u.string);
}
U64 read_size = cursor - off;
return read_size;
}
internal U64
coff_read_resource(String8 raw_res, U64 off, Arena *arena, COFF_Resource *res_out)
{
// parse header
COFF_ResourceHeaderPrefix prefix; MemoryZeroStruct(&prefix);
U64 cursor = str8_deserial_read_struct(raw_res, off, &prefix);
String8 header_data = str8_substr(raw_res, rng_1u64(off, off + prefix.header_size));
COFF_ResourceID_16 type_16; MemoryZeroStruct(&type_16);
cursor += coff_read_resource_id(header_data, cursor, &type_16);
cursor = AlignPow2(cursor, COFF_RES_ALIGN);
COFF_ResourceID_16 name_16; MemoryZeroStruct(&name_16);
cursor += coff_read_resource_id(header_data, cursor, &name_16);
cursor = AlignPow2(cursor, COFF_RES_ALIGN);
U32 data_version = 0;
cursor += str8_deserial_read_struct(header_data, cursor, &data_version);
COFF_ResourceMemoryFlags memory_flags = 0;
cursor += str8_deserial_read_struct(header_data, cursor, &memory_flags);
U16 language_id = 0;
cursor += str8_deserial_read_struct(header_data, cursor, &language_id);
U32 version = 0;
cursor += str8_deserial_read_struct(header_data, cursor, &version);
U32 characteristics = 0;
cursor += str8_deserial_read_struct(header_data, cursor, &characteristics);
String8 data;
cursor += str8_deserial_read_block(raw_res, off + prefix.header_size, prefix.data_size, &data);
// was resource parsed?
Assert(cursor >= prefix.data_size + prefix.header_size);
// fill out result
res_out->type = coff_convert_resource_id(arena, &type_16);
res_out->name = coff_convert_resource_id(arena, &name_16);
res_out->language_id = language_id;
res_out->data_version = data_version;
res_out->version = version;
res_out->memory_flags = memory_flags;
res_out->data = data;
U64 resource_size = AlignPow2(prefix.data_size + prefix.header_size, COFF_RES_ALIGN);
return resource_size;
}
internal COFF_ResourceList
coff_resource_list_from_data(Arena *arena, String8 data)
{
COFF_ResourceList list; MemoryZeroStruct(&list);
for (U64 cursor = 0, stride; cursor < data.size; cursor += stride) {
COFF_ResourceNode *node = push_array(arena, COFF_ResourceNode, 1);
stride = coff_read_resource(data, cursor, arena, &node->data);
list.count += 1;
SLLQueuePush(list.first, list.last, node);
}
return list;
}
////////////////////////////////
internal COFF_DataType
coff_data_type_from_data(String8 data)
{
B32 is_big_obj = coff_is_big_obj(data);
if (is_big_obj) {
return COFF_DataType_BIG_OBJ;
}
B32 is_import = coff_is_import(data);
if (is_import) {
return COFF_DataType_IMPORT;
}
return COFF_DataType_OBJ;
}
internal B32
coff_is_import(String8 data)
{
B32 is_import = 0;
if (data.size >= sizeof(U16)*2) {
U16 *sig1 = (U16*)data.str;
U16 *sig2 = sig1 + 1;
is_import = *sig1 == COFF_MachineType_UNKNOWN && *sig2 == 0xffff;
}
return is_import;
}
internal B32
coff_is_archive(String8 data)
{
U64 sig = 0;
str8_deserial_read_struct(data, 0, &sig);
B32 is_archive = sig == COFF_ARCHIVE_SIG;
return is_archive;
}
internal B32
coff_is_thin_archive(String8 data)
{
U64 sig = 0;
str8_deserial_read_struct(data, 0, &sig);
B32 is_archive = sig == COFF_THIN_ARCHIVE_SIG;
return is_archive;
}
internal U64
coff_read_archive_member_header(String8 data, U64 offset, COFF_ArchiveMemberHeader *header_out)
{
#define NAME_SIZE 16
#define DATE_SIZE 12
#define USER_ID_SIZE 6
#define GROUP_ID_SIZE 6
#define MODE_SIZE 8
#define SIZE_SIZE 10
#define TOTAL_SIZE (NAME_SIZE + DATE_SIZE + USER_ID_SIZE + GROUP_ID_SIZE + MODE_SIZE + SIZE_SIZE)
if (str8_deserial_get_raw_ptr(data, offset, TOTAL_SIZE) == NULL) {
return 0;
}
U64 read_offset = offset;
U8 *name = (U8 *)str8_deserial_get_raw_ptr(data, read_offset, NAME_SIZE);
read_offset += NAME_SIZE;
U8 *date = (U8 *)str8_deserial_get_raw_ptr(data, read_offset, DATE_SIZE);
read_offset += DATE_SIZE;
U8 *user_id = (U8 *)str8_deserial_get_raw_ptr(data, read_offset, USER_ID_SIZE);
read_offset += USER_ID_SIZE;
U8 *group_id = (U8 *)str8_deserial_get_raw_ptr(data, read_offset, GROUP_ID_SIZE);
read_offset += GROUP_ID_SIZE;
U8 *mode = (U8 *)str8_deserial_get_raw_ptr(data, read_offset, MODE_SIZE);
read_offset += MODE_SIZE;
U8 *size = (U8 *)str8_deserial_get_raw_ptr(data, read_offset, SIZE_SIZE);
read_offset += SIZE_SIZE;
U8 end[] = { 0, 0 };
read_offset += str8_deserial_read_array(data, read_offset, &end[0], ArrayCount(end));
U64 i;
for (i = 0; i < NAME_SIZE; ++i) {
if (name[i] == ' ') {
break;
}
}
header_out->name = str8(name, i);
header_out->date = (U32)s64_from_str8(str8(date, DATE_SIZE), 10);
header_out->user_id = (U32)s64_from_str8(str8(user_id, USER_ID_SIZE), 10);
header_out->group_id = (U32)s64_from_str8(str8(group_id, GROUP_ID_SIZE), 10);
header_out->mode = str8(mode, MODE_SIZE);
for (i = 0; i < SIZE_SIZE; ++i) {
if (size[i] == ' ') {
break;
}
}
header_out->size = (U32)s64_from_str8(str8(size, i), 10);
header_out->is_end_correct = (end[0] == '`' && end[1] == '\n');
U64 result = (read_offset - offset);
return result;
#undef NAME_SIZE
#undef DATE_SIZE
#undef USER_ID_SIZE
#undef GROUP_ID_SIZE
#undef MODE_SIZE
#undef SIZE_SIZE
#undef TOTAL_SIZE
}
internal COFF_ArchiveMember
coff_read_archive_member(String8 data, U64 offset)
{
COFF_ArchiveMember member; MemoryZeroStruct(&member);
coff_archive_member_iter_next(data, &offset, &member);
return member;
}
internal COFF_ArchiveMember
coff_archive_member_from_data(String8 data)
{
return coff_read_archive_member(data, 0);
}
internal U64
coff_read_archive_import(String8 data, U64 offset, COFF_ImportHeader *header_out)
{
U64 cursor = offset;
cursor += str8_deserial_read_struct(data, cursor, &header_out->sig1);
cursor += str8_deserial_read_struct(data, cursor, &header_out->sig2);
cursor += str8_deserial_read_struct(data, cursor, &header_out->version);
cursor += str8_deserial_read_struct(data, cursor, &header_out->machine);
cursor += str8_deserial_read_struct(data, cursor, &header_out->time_stamp);
cursor += str8_deserial_read_struct(data, cursor, &header_out->data_size);
cursor += str8_deserial_read_struct(data, cursor, &header_out->hint);
U16 flags = 0;
cursor += str8_deserial_read_struct(data, cursor, &flags);
header_out->type = COFF_IMPORT_HEADER_GET_TYPE(flags);
header_out->name_type = COFF_IMPORT_HEADER_GET_NAME_TYPE(flags);
header_out->func_name = str8(0,0);
cursor += str8_deserial_read_cstr(data, cursor, &header_out->func_name);
header_out->dll_name = str8(0,0);
cursor += str8_deserial_read_cstr(data, cursor, &header_out->dll_name);
Assert(header_out->func_name.size + header_out->dll_name.size + /* nulls */ 2 == header_out->data_size);
U64 read_size = cursor - offset;
return read_size;
}
internal COFF_ImportHeader
coff_archive_import_from_data(String8 data)
{
COFF_ImportHeader header; MemoryZeroStruct(&header);
coff_read_archive_import(data, 0, &header);
return header;
}
internal String8
coff_read_archive_long_name(String8 long_names, String8 name)
{
String8 result = name;
if (name.size > 0 && name.str[0] == '/') {
String8 offset_str = str8(name.str + 1, name.size - 1);
U64 offset = u64_from_str8(offset_str, 10);
if (offset < long_names.size) {
U8 *ptr = long_names.str + offset;
U8 *opl = long_names.str + long_names.size;
for (; ptr < opl; ++ptr) {
if (*ptr == '\0' || *ptr == '\n') {
break;
}
}
result = str8_range(long_names.str + offset, ptr);
}
}
return result;
}
internal U64
coff_archive_member_iter_init(String8 data)
{
U64 cursor = 0;
U64 sig = 0;
cursor += str8_deserial_read_struct(data, cursor, &sig);
if (sig != COFF_ARCHIVE_SIG) {
cursor = data.size;
}
return cursor;
}
internal B32
coff_archive_member_iter_next(String8 data, U64 *offset, COFF_ArchiveMember *member_out)
{
B32 is_parsed;
COFF_ArchiveMemberHeader header;
U64 header_read_size = coff_read_archive_member_header(data, *offset, &header);
if (header_read_size && header.is_end_correct) {
Rng1U64 data_range = rng_1u64(*offset + header_read_size, *offset + header_read_size + header.size);
member_out->header = header;
member_out->offset = *offset;
member_out->data = str8_substr(data, data_range);
*offset += header_read_size;
*offset += member_out->header.size;
*offset = AlignPow2(*offset, COFF_ARCHIVE_ALIGN);
is_parsed = 1;
} else {
MemoryZeroStruct(&member_out->header);
member_out->offset = max_U64;
member_out->data = str8(0,0);
is_parsed = 0;
}
return is_parsed;
}
internal B32
coff_get_first_archive_member(COFF_ArchiveMember *member, COFF_ArchiveFirstMember *first_out)
{
B32 is_header = str8_match(member->header.name, str8_lit("/"), 0);
if (is_header) {
U64 cursor = 0;
U32 symbol_count = 0;
cursor += str8_deserial_read_struct(member->data, cursor, &symbol_count);
#if ARCH_LITTLE_ENDIAN
symbol_count = bswap_u32(symbol_count);
#endif
Rng1U64 member_offsets_range = rng_1u64(cursor, cursor + symbol_count * sizeof(U32));
cursor += dim_1u64(member_offsets_range);
Rng1U64 string_table_range = rng_1u64(cursor, member->data.size);
cursor += dim_1u64(string_table_range);
first_out->symbol_count = symbol_count;
first_out->member_offsets = str8_substr(member->data, member_offsets_range);
first_out->string_table = str8_substr(member->data, string_table_range);
}
return is_header;
}
internal B32
coff_get_second_archive_member(COFF_ArchiveMember *member, COFF_ArchiveSecondMember *second_out)
{
B32 is_header = str8_match(member->header.name, str8_lit("/"), 0);
if (is_header) {
U64 cursor = 0;
U32 member_count = 0;
cursor += str8_deserial_read_struct(member->data, cursor, &member_count);
Rng1U64 member_offsets_range = rng_1u64(cursor, cursor + member_count * sizeof(U32));
cursor += dim_1u64(member_offsets_range);
U32 symbol_count = 0;
cursor += str8_deserial_read_struct(member->data, cursor, &symbol_count);
Rng1U64 symbol_indices_range = rng_1u64(cursor, cursor + symbol_count * sizeof(U16));
cursor += dim_1u64(symbol_indices_range);
Rng1U64 string_table_range = rng_1u64(cursor, member->data.size);
second_out->member_count = member_count;
second_out->symbol_count = symbol_count;
second_out->member_offsets = str8_substr(member->data, member_offsets_range);
second_out->symbol_indices = str8_substr(member->data, symbol_indices_range);
second_out->string_table = str8_substr(member->data, string_table_range);
}
return is_header;
}
internal void
coff_archive_member_list_push_node(COFF_ArchiveMemberList *list, COFF_ArchiveMemberNode *node)
{
SLLQueuePush(list->first, list->last, node);
list->count += 1;
}
internal COFF_ArchiveParse
coff_archive_parse_from_member_list(COFF_ArchiveMemberList member_list)
{
COFF_ArchiveMember first_header; MemoryZeroStruct(&first_header);
COFF_ArchiveMember second_header; MemoryZeroStruct(&second_header);
COFF_ArchiveMember long_names_member; MemoryZeroStruct(&long_names_member);
if (member_list.count) {
if (str8_match(member_list.first->data.header.name, str8_lit("/"), 0)) {
first_header = member_list.first->data;
SLLQueuePop(member_list.first, member_list.last);
member_list.count -= 1;
if (member_list.count && str8_match(member_list.first->data.header.name, str8_lit("/"), 0)) {
second_header = member_list.first->data;
SLLQueuePop(member_list.first, member_list.last);
member_list.count -= 1;
}
if (member_list.count && str8_match(member_list.first->data.header.name, str8_lit("//"), 0)) {
long_names_member = member_list.first->data;
SLLQueuePop(member_list.first, member_list.last);
member_list.count -= 1;
}
}
}
COFF_ArchiveFirstMember first_member; MemoryZeroStruct(&first_member);
coff_get_first_archive_member(&first_header, &first_member);
COFF_ArchiveSecondMember second_member; MemoryZeroStruct(&second_member);
coff_get_second_archive_member(&second_header, &second_member);
COFF_ArchiveParse parse; MemoryZeroStruct(&parse);
parse.first_member = first_member;
parse.second_member = second_member;
parse.long_names = long_names_member.data;
return parse;
}
internal COFF_ArchiveParse
coff_archive_from_data(Arena *arena, String8 data)
{
COFF_ArchiveMemberList list; MemoryZeroStruct(&list);
COFF_ArchiveMemberNode node_arr[3]; MemoryZeroStruct(&node_arr[0]);
U64 cursor = coff_archive_member_iter_init(data);
for (U64 i = 0; i < ArrayCount(node_arr); i += 1) {
COFF_ArchiveMemberNode *node = &node_arr[i];
if (!coff_archive_member_iter_next(data, &cursor, &node->data)) {
break;
}
coff_archive_member_list_push_node(&list, node);
}
return coff_archive_parse_from_member_list(list);
}
internal U64
coff_thin_archive_member_iter_init(String8 data)
{
U64 cursor = 0;
U64 sig = 0;
cursor += str8_deserial_read_struct(data, cursor, &sig);
if (sig != COFF_THIN_ARCHIVE_SIG) {
cursor = data.size;
}
return cursor;
}
internal B32
coff_thin_archive_member_iter_next(String8 data, U64 *offset, COFF_ArchiveMember *member_out)
{
B32 is_parsed = 0;
U64 header_size = coff_read_archive_member_header(data, *offset, &member_out->header);
if (header_size) {
member_out->offset = *offset;
*offset += header_size;
if (str8_match(member_out->header.name, str8_lit("/"), 0) || str8_match(member_out->header.name, str8_lit("//"), 0)) {
Rng1U64 data_range = rng_1u64(*offset, *offset + member_out->header.size);
member_out->data = str8_substr(data, data_range);
*offset += member_out->header.size;
} else {
// size field in non-header members means size of stand-alone obj
member_out->data = str8(0,0);
}
*offset = AlignPow2(*offset, COFF_ARCHIVE_ALIGN);
is_parsed = 1;
}
return is_parsed;
}
internal COFF_ArchiveParse
coff_thin_archive_from_data(Arena *arena, String8 data)
{
COFF_ArchiveMemberList list; MemoryZeroStruct(&list);
COFF_ArchiveMemberNode node_arr[3]; MemoryZeroStruct(&node_arr[0]);
U64 cursor = coff_thin_archive_member_iter_init(data);
for (U64 i = 0; i < ArrayCount(node_arr); i += 1) {
COFF_ArchiveMemberNode *node = &node_arr[i];
if (!coff_thin_archive_member_iter_next(data, &cursor, &node->data)) {
break;
}
coff_archive_member_list_push_node(&list, node);
}
return coff_archive_parse_from_member_list(list);
}
internal COFF_ArchiveType
coff_archive_type_from_data(String8 data)
{
if (coff_is_archive(data)) {
return COFF_Archive_Regular;
} else if (coff_is_thin_archive(data)) {
return COFF_Archive_Thin;
}
return COFF_Archive_Null;
}
internal COFF_ArchiveParse
coff_archive_parse_from_data(Arena *arena, String8 data)
{
COFF_ArchiveType type = coff_archive_type_from_data(data);
switch (type) {
case COFF_Archive_Null: break;
case COFF_Archive_Regular: return coff_archive_from_data(arena, data);
case COFF_Archive_Thin: return coff_thin_archive_from_data(arena, data);
}
COFF_ArchiveParse null_parse; MemoryZeroStruct(&null_parse);
return null_parse;
}
////////////////////////////////
internal String8
coff_string_from_comdat_select_type(COFF_ComdatSelectType select)
{
String8 result = str8(0,0);
switch (select) {
case COFF_ComdatSelectType_NULL: result = str8_lit("NULL"); break;
case COFF_ComdatSelectType_NODUPLICATES: result = str8_lit("NODUPLICATES"); break;
case COFF_ComdatSelectType_ANY: result = str8_lit("ANY"); break;
case COFF_ComdatSelectType_SAME_SIZE: result = str8_lit("SAME_SIZE"); break;
case COFF_ComdatSelectType_EXACT_MATCH: result = str8_lit("EXACT_MATCH"); break;
case COFF_ComdatSelectType_ASSOCIATIVE: result = str8_lit("ASSOCIATIVE"); break;
case COFF_ComdatSelectType_LARGEST: result = str8_lit("LARGEST"); break;
}
return result;
}
internal String8
coff_string_from_machine_type(COFF_MachineType machine)
{
String8 result = str8(0,0);
switch (machine) {
case COFF_MachineType_UNKNOWN: result = str8_lit("UNKNOWN"); break;
case COFF_MachineType_X86: result = str8_lit("X86"); break;
case COFF_MachineType_X64: result = str8_lit("X64"); break;
case COFF_MachineType_AM33: result = str8_lit("AM33"); break;
case COFF_MachineType_ARM: result = str8_lit("ARM"); break;
case COFF_MachineType_ARM64: result = str8_lit("ARM64"); break;
case COFF_MachineType_ARMNT: result = str8_lit("ARMNT"); break;
case COFF_MachineType_EBC: result = str8_lit("EBC"); break;
case COFF_MachineType_IA64: result = str8_lit("IA64"); break;
case COFF_MachineType_M32R: result = str8_lit("M32R"); break;
case COFF_MachineType_MIPS16: result = str8_lit("MIPS16"); break;
case COFF_MachineType_MIPSFPU: result = str8_lit("MIPSFPU"); break;
case COFF_MachineType_MIPSFPU16: result = str8_lit("MIPSFPU16"); break;
case COFF_MachineType_POWERPC: result = str8_lit("POWERPC"); break;
case COFF_MachineType_POWERPCFP: result = str8_lit("POWERPCFP"); break;
case COFF_MachineType_R4000: result = str8_lit("R4000"); break;
case COFF_MachineType_RISCV32: result = str8_lit("RISCV32"); break;
case COFF_MachineType_RISCV64: result = str8_lit("RISCV64"); break;
case COFF_MachineType_RISCV128: result = str8_lit("RISCV128"); break;
case COFF_MachineType_SH3: result = str8_lit("SH3"); break;
case COFF_MachineType_SH3DSP: result = str8_lit("SH3DSP"); break;
case COFF_MachineType_SH4: result = str8_lit("SH4"); break;
case COFF_MachineType_SH5: result = str8_lit("SH5"); break;
case COFF_MachineType_THUMB: result = str8_lit("THUMB"); break;
case COFF_MachineType_WCEMIPSV2: result = str8_lit("WCEMIPSV2"); break;
}
return result;
}
internal String8
coff_string_from_section_flags(Arena *arena, COFF_SectionFlags flags)
{
Temp scratch = scratch_begin(&arena, 1);
String8List list = {0};
if (flags & COFF_SectionFlag_TYPE_NO_PAD) {
str8_list_pushf(scratch.arena, &list, "TYPE_NO_PAD");
}
if (flags & COFF_SectionFlag_CNT_CODE) {
str8_list_pushf(scratch.arena, &list, "CNT_CODE");
}
if (flags & COFF_SectionFlag_CNT_INITIALIZED_DATA) {
str8_list_pushf(scratch.arena, &list, "CNT_INITIALIZED_DATA");
}
if (flags & COFF_SectionFlag_CNT_UNINITIALIZED_DATA) {
str8_list_pushf(scratch.arena, &list, "CNT_UNINITIALIZED_DATA");
}
if (flags & COFF_SectionFlag_LNK_OTHER) {
str8_list_pushf(scratch.arena, &list, "LNK_OTHER");
}
if (flags & COFF_SectionFlag_LNK_INFO) {
str8_list_pushf(scratch.arena, &list, "LNK_INFO");
}
if (flags & COFF_SectionFlag_LNK_COMDAT) {
str8_list_pushf(scratch.arena, &list, "LNK_COMDAT");
}
if (flags & COFF_SectionFlag_GPREL) {
str8_list_pushf(scratch.arena, &list, "GPREL");
}
if (flags & COFF_SectionFlag_MEM_16BIT) {
str8_list_pushf(scratch.arena, &list, "MEM_16BIT");
}
if (flags & COFF_SectionFlag_MEM_LOCKED) {
str8_list_pushf(scratch.arena, &list, "MEM_LOCKED");
}
if (flags & COFF_SectionFlag_MEM_PRELOAD) {
str8_list_pushf(scratch.arena, &list, "MEM_PRELOAD");
}
if (flags & COFF_SectionFlag_LNK_NRELOC_OVFL) {
str8_list_pushf(scratch.arena, &list, "LNK_NRELOC_OVFL");
}
if (flags & COFF_SectionFlag_MEM_DISCARDABLE) {
str8_list_pushf(scratch.arena, &list, "MEM_DISCARDABLE");
}
if (flags & COFF_SectionFlag_MEM_NOT_CACHED) {
str8_list_pushf(scratch.arena, &list, "MEM_NOT_CACHED");
}
if (flags & COFF_SectionFlag_MEM_NOT_PAGED) {
str8_list_pushf(scratch.arena, &list, "MEM_NOT_PAGED");
}
if (flags & COFF_SectionFlag_MEM_SHARED) {
str8_list_pushf(scratch.arena, &list, "MEM_SHARED");
}
if (flags & COFF_SectionFlag_MEM_EXECUTE) {
str8_list_pushf(scratch.arena, &list, "MEM_EXECUTE");
}
if (flags & COFF_SectionFlag_MEM_READ) {
str8_list_pushf(scratch.arena, &list, "MEM_READ");
}
if (flags & COFF_SectionFlag_MEM_WRITE) {
str8_list_pushf(scratch.arena, &list, "MEM_WRITE");
}
U64 align = COFF_SectionFlags_Extract_ALIGN(flags);
if (align) {
str8_list_pushf(scratch.arena, &list, "ALIGN=%u", align);
}
StringJoin join = {0};
join.sep = str8_lit(", ");
String8 result = str8_list_join(arena, &list, &join);
scratch_end(scratch);
return result;
}
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