KolibriOS/kolibrios
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kolibrios/programs/develop/clink/main.c
Magomed Kostoev (mkostoevr) 519b298e48 [clink] Return zero (success) 
git-svn-id: svn://kolibrios.org@8620 a494cfbc-eb01-0410-851d-a64ba20cac60
2021-03-01 17:26:41 +00:00

576 lines
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C
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// TODO: Substract section's RVA from external and static defined symbol's value
// TODO: Substract section's RVA from relocations
#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>
#include <assert.h>
#include <string.h>
#define EPEP_INST
#include "epep/epep.h"
typedef char *pchar;
typedef struct {
Epep epep;
char *name;
size_t *section_offsets;
} CoffObject;
typedef struct {
size_t obj_id;
size_t sec_id;
} ObjIdSecId;
typedef struct {
ObjIdSecId *source;
uint32_t characteristics;
size_t size;
size_t number_of_relocations;
} SectionInfo;
typedef struct {
EpepCoffSymbol sym;
EpepCoffSymbol *auxes;
char *name;
size_t object_index;
size_t index;
} Symbol;
#define CDICT_VAL_T SectionInfo
#define CDICT_INST
#include "cdict/cdict.h"
#define CDICT_VAL_T Symbol
#define CDICT_INST
#include "cdict/cdict.h"
typedef struct {
CoffObject *objects;
char **section_names_set;
CDict_CStr_SectionInfo info_per_section;
CDict_CStr_Symbol symtab;
char **sym_name_set;
size_t number_of_symbols;
} ObjectIr;
#define CVEC_INST
#define CVEC_TYPE CoffObject
#include "cvec/cvec.h"
#define CVEC_INST
#define CVEC_TYPE size_t
#include "cvec/cvec.h"
#define CVEC_INST
#define CVEC_TYPE pchar
#include "cvec/cvec.h"
#define CVEC_INST
#define CVEC_TYPE char
#include "cvec/cvec.h"
#define CVEC_INST
#define CVEC_TYPE ObjIdSecId
#include "cvec/cvec.h"
#define CVEC_INST
#define CVEC_TYPE EpepCoffSymbol
#include "cvec/cvec.h"
#define ERROR_EPEP(epep) printf("Error: epep returned %u at "__FILE__":%u", \
(epep)->error_code, __LINE__); exit(-1)
#define ERROR_CDICT(cdict) printf("Error: cdict returned %u at "__FILE__":%u", \
(cdict)->error_code, __LINE__); exit(-1);
static void fwrite8(FILE *f, uint8_t b) {
fputc(b, f);
}
static void fwrite16(FILE *f, uint16_t w) {
fputc((w & 0x00ff) >> 0, f);
fputc((w & 0xff00) >> 8, f);
}
static void fwrite32(FILE *f, uint32_t d) {
fputc((d & 0x000000ff) >> 0, f);
fputc((d & 0x0000ff00) >> 8, f);
fputc((d & 0x00ff0000) >> 16, f);
fputc((d & 0xff000000) >> 24, f);
}
static size_t strtab_add(char **strtab, char *str) {
size_t res = cvec_char_size(strtab);
for (char *p = str; *p; p++) {
cvec_char_push_back(strtab, *p);
}
cvec_char_push_back(strtab, '\0');
return res + 4;
}
static size_t get_section_number(char ***section_names_set, char *sec_name) {
for (size_t i = 0; i < cvec_pchar_size(section_names_set); i++) {
char *it = cvec_pchar_at(section_names_set, i);
if (!strcmp(it, sec_name)) {
return i + 1;
}
}
return 0;
}
static void add_name_to_set(char *sym_name, char ***set) {
for (size_t i = 0; i < cvec_pchar_size(set); i++) {
char *it = cvec_pchar_at(set, i);
if (!strcmp(it, sym_name)) {
return;
}
}
cvec_pchar_push_back(set, sym_name);
}
static void build(ObjectIr *ir) {
FILE *out = fopen("a.out.obj", "wb");
char *strtab = cvec_char_new(1024);
size_t size_of_sections = 0;
size_t number_of_relocations = 0;
printf("Calculating all sections size and relocations count... ");
for (size_t sec_i = 0; sec_i < cvec_pchar_size(&ir->section_names_set); sec_i++) {
char *name = ir->section_names_set[sec_i];
SectionInfo si = cdict_CStr_SectionInfo_get_v(&ir->info_per_section, name);
size_of_sections += si.size;
number_of_relocations += si.number_of_relocations;
}
printf("Done: %u & %u\n", size_of_sections, number_of_relocations);
size_t fisrt_section_offset = 20 + 40 * cvec_pchar_size(&ir->section_names_set);
size_t offset_to_first_relocation = fisrt_section_offset + size_of_sections;
size_t offset_to_next_relocation = offset_to_first_relocation;
size_t next_section_offset = fisrt_section_offset;
size_t PointerToSymbolTable = fisrt_section_offset + size_of_sections + number_of_relocations * 10;
// COFF Header
printf("Writing COFF header... ");
fwrite16(out, 0x14c); // Machine
fwrite16(out, cvec_pchar_size(&ir->section_names_set)); // NumberOfSections
fwrite32(out, 0); // TimeDataStamp
fwrite32(out, PointerToSymbolTable); // PointerToSymbolTable
fwrite32(out, ir->number_of_symbols); // NumberOfSymbols
fwrite16(out, 0); // SizeOfOptionalHeader
fwrite16(out, 0); // Characteristics
printf("Done.\n");
// Section Headers
printf("Writing section headers {\n");
for (size_t sec_i = 0; sec_i < cvec_pchar_size(&ir->section_names_set); sec_i++) {
char *name = ir->section_names_set[sec_i];
SectionInfo si = cdict_CStr_SectionInfo_get_v(&ir->info_per_section, name);
// Name
printf(" Writing %s Section Header... ", name);
if (strlen(name) <= 8) {
for (size_t i = 0; i < 8; i++) {
size_t sl = strlen(name);
fwrite8(out, i < sl ? name[i] : '\0');
}
} else {
fwrite8(out, '/');
size_t strtab_index = strtab_add(&strtab, name);
char numstr[8] = { 0 };
sprintf(numstr, "%u", strtab_index);
fwrite(numstr, 1, 7, out);
}
fwrite32(out, 0); // VirtualSize
fwrite32(out, 0); // VirtualAddress
fwrite32(out, si.size); // SizeOfRawData
fwrite32(out, next_section_offset); // PointerToRawData
next_section_offset += si.size;
fwrite32(out, offset_to_next_relocation); // PointerToRelocations
offset_to_next_relocation += si.number_of_relocations * 10;
fwrite32(out, 0); // PointerToLinenumbers
fwrite16(out, si.number_of_relocations); // NumberOfRelocations
fwrite16(out, 0); // NumberOfLinenumbers
fwrite32(out, si.characteristics); // Characteristics
printf("Done.\n");
}
printf("}\n");
// Section data
printf("Writing sections {\n");
for (size_t sec_i = 0; sec_i < cvec_pchar_size(&ir->section_names_set); sec_i++) {
char *name = ir->section_names_set[sec_i];
SectionInfo si = cdict_CStr_SectionInfo_get_v(&ir->info_per_section, name);
printf(" Writing %s... ", name);
for (size_t i = 0; i < cvec_ObjIdSecId_size(&si.source); i++) {
ObjIdSecId id = cvec_ObjIdSecId_at(&si.source, i);
CoffObject *object = &ir->objects[id.obj_id];
Epep *epep = &object->epep;
EpepSectionHeader sh = { 0 };
if (!epep_get_section_header_by_index(epep, &sh, id.sec_id)) {
ERROR_EPEP(epep);
}
// If the section contains uninitialized data (BSS)
// it should be filled by zeroes
// Yes, current implementation emits BSS sections too
// cause KOS has no idea they should be allocated automatically
// cause FASM has no idea they should be generated without contents
// cause Tomasz Grysztar didn't care
char *buf = calloc(sh.SizeOfRawData, 1);
// Othervice it should be filled by its contents from source object
if (!(sh.Characteristics & 0x00000080)) {
if (!epep_get_section_contents(epep, &sh, buf)) {
ERROR_EPEP(epep);
}
}
fwrite(buf, 1, sh.SizeOfRawData, out);
}
printf("Done.\n");
}
printf("}\n");
// COFF Relocations
printf("Writing COFF Relocations {\n");
for (size_t sec_i = 0; sec_i < cvec_pchar_size(&ir->section_names_set); sec_i++) {
char *name = ir->section_names_set[sec_i];
SectionInfo si = cdict_CStr_SectionInfo_get_v(&ir->info_per_section, name);
printf(" Writing relocations of %s {\n", name);
for (size_t i = 0; i < cvec_ObjIdSecId_size(&si.source); i++) {
ObjIdSecId id = cvec_ObjIdSecId_at(&si.source, i);
CoffObject *object = &ir->objects[id.obj_id];
Epep *epep = &object->epep;
size_t strtab_size = 0;
if (!epep_get_string_table_size(epep, &strtab_size)) {
ERROR_EPEP(epep);
}
char *obj_strtab = malloc(strtab_size);
if (!epep_get_string_table(epep, obj_strtab)) {
ERROR_EPEP(epep);
}
EpepSectionHeader sh = { 0 };
if (!epep_get_section_header_by_index(epep, &sh, id.sec_id)) {
ERROR_EPEP(epep);
}
for (size_t rel_i = 0; rel_i < sh.NumberOfRelocations; rel_i++) {
EpepCoffRelocation rel = { 0 };
if (!epep_get_section_relocation_by_index(epep, &sh, &rel, rel_i)) {
ERROR_EPEP(epep);
}
printf(" { %02x, %02x, %02x }", rel.VirtualAddress, rel.SymbolTableIndex, rel.Type);
rel.VirtualAddress += object->section_offsets[sec_i];
{
size_t index = rel.SymbolTableIndex;
EpepCoffSymbol sym = { 0 };
if (!epep_get_symbol_by_index(epep, &sym, index)) {
ERROR_EPEP(epep);
}
size_t name_max = 1024;
char name[name_max];
if (sym.symbol.Zeroes == 0) {
strcpy(name, &obj_strtab[sym.symbol.Offset]);
} else {
memcpy(name, sym.symbol.ShortName, 8);
name[8] = '\0';
}
if (!strcmp(name, "_EXPORTS")) {
strcpy(name, "EXPORTS");
}
if (sym.symbol.StorageClass != 2) {
sprintf(name, "%s@%s", name, object->name);
}
Symbol old_sym = cdict_CStr_Symbol_get_v(&ir->symtab, name);
if (old_sym.name == NULL) {
printf("Internal error: Symbol of %s relocation not found", name);
exit(-1);
}
rel.SymbolTableIndex = old_sym.index;
printf(" -> { %02x, %02x, %02x }: ", rel.VirtualAddress, rel.SymbolTableIndex, rel.Type);
printf("New relocation of %s in %s\n", name, sh.Name);
}
fwrite(&rel, 1, 10, out);
}
}
printf(" }\n");
}
printf("}\n");
// Symbols Table
printf("Writing symbols {\n");
for (size_t sym_i = 0; sym_i < cvec_pchar_size(&ir->sym_name_set); sym_i++) {
char *name = ir->sym_name_set[sym_i];
Symbol sym = cdict_CStr_Symbol_get_v(&ir->symtab, name);
if (sym.sym.symbol.SectionNumber == 0xffff ||
sym.sym.symbol.SectionNumber == 0xfffe ||
(sym.sym.symbol.StorageClass != 2 && sym.sym.symbol.StorageClass != 3)) {
fwrite(&sym.sym.symbol, 1, 18, out);
} else {
size_t sec_name_max = 1024;
char sec_name[sec_name_max];
size_t object_index = sym.object_index;
CoffObject *object = &ir->objects[object_index];
Epep *epep = &object->epep;
size_t section_offset = object->section_offsets[sym.sym.symbol.SectionNumber - 1];
size_t strtab_size = 0;
if (!epep_get_string_table_size(epep, &strtab_size)) {
ERROR_EPEP(epep);
}
char *obj_strtab = malloc(strtab_size);
if (!epep_get_string_table(epep, obj_strtab)) {
ERROR_EPEP(epep);
}
EpepSectionHeader sh = { 0 };
if (!epep_get_section_header_by_index(epep, &sh, sym.sym.symbol.SectionNumber - 1)) {
ERROR_EPEP(epep);
}
if (sh.Name[0] == '/') {
strcpy(sec_name, &obj_strtab[atoi(&sh.Name[1])]);
} else {
memcpy(sec_name, sh.Name, 8);
sec_name[8] = '\0';
}
printf("%s:\n", sym.name);
printf(" Section: %s\n", sec_name);
printf(" StorageClass: %u\n", sym.sym.symbol.StorageClass);
sym.sym.symbol.SectionNumber = get_section_number(&ir->section_names_set, sec_name);
if (sym.sym.symbol.SectionNumber == 0) {
printf("Internal error: %s section is not found in output file");
exit(-1);
}
sym.sym.symbol.Value += section_offset;
if (strlen(sym.name) <= 8) {
strcpy(sym.sym.symbol.ShortName, sym.name);
} else {
sym.sym.symbol.Zeroes = 0;
sym.sym.symbol.Offset = strtab_add(&strtab, name);
}
fwrite(&sym.sym.symbol, 1, 18, out);
}
for (size_t aux_i = 0; aux_i < sym.sym.symbol.NumberOfAuxSymbols; aux_i++) {
fwrite(&sym.auxes[aux_i].symbol, 1, 18, out);
}
}
printf("}\n");
// COFF String Table
printf("Writing COFF String Table... ");
fwrite32(out, cvec_pchar_size(&strtab) + 4);
fwrite(strtab, 1, cvec_pchar_size(&strtab), out);
printf("Done.\n");
}
static ObjectIr parse_objects(int argc, char **argv) {
CoffObject *objects = cvec_CoffObject_new(128);
char **section_names_set = cvec_pchar_new(4);
char **sym_name_set = cvec_pchar_new(128);
size_t number_of_symbols = 0;
for (int i = 1; i < argc; i++) {
printf("Primary parsing of %s... ", argv[i]);
CoffObject object = { 0 };
object.name = argv[i];
object.section_offsets = cvec_size_t_new(128);
{
FILE *fp = fopen(object.name, "rb");
if (!fp) {
printf("Error: Can't open \"%s\"", object.name);
exit(-1);
}
if (!epep_init(&object.epep, fp)) {
ERROR_EPEP(&object.epep);
}
}
cvec_CoffObject_push_back(&objects, object);
printf("Done.\n");
}
CDict_CStr_Symbol symtab;
if (!cdict_CStr_Symbol_init(&symtab)) {
ERROR_CDICT(&symtab);
}
CDict_CStr_SectionInfo info_per_section;
if (!cdict_CStr_SectionInfo_init(&info_per_section)) {
ERROR_CDICT(&info_per_section);
}
for (size_t i = 0; i < cvec_CoffObject_size(&objects); i++) {
printf("Secondary parsing of %s {\n", objects[i].name);
Epep *epep = &(objects[i].epep);
size_t strtab_size = 0;
if (!epep_get_string_table_size(epep, &strtab_size)) {
ERROR_EPEP(epep);
}
char *strtab = malloc(strtab_size);
if (!epep_get_string_table(epep, strtab)) {
ERROR_EPEP(epep);
}
// Fill symbols table
printf(" Symbols {\n");
for (size_t sym_i = 0; sym_i < epep->coffFileHeader.NumberOfSymbols; sym_i++) {
EpepCoffSymbol sym = { 0 };
if (!epep_get_symbol_by_index(epep, &sym, sym_i)) {
ERROR_EPEP(epep);
}
size_t name_max = 1024;
char name[name_max];
if (sym.symbol.Zeroes == 0) {
strcpy(name, &strtab[sym.symbol.Offset]);
} else {
memcpy(name, sym.symbol.ShortName, 8);
name[8] = '\0';
}
if (!strcmp(name, "_EXPORTS")) {
strcpy(name, "EXPORTS");
}
if (sym.symbol.StorageClass != 2) {
sprintf(name, "%s@%s", name, objects[i].name);
}
if (sym.symbol.StorageClass != 2 || sym.symbol.SectionNumber) {
if (memcmp(cdict_CStr_Symbol_get_v(&symtab, name).sym.symbol.ShortName, "\0\0\0\0\0\0\0\0", 8)) {
printf("Error: Redefinition of \"%s\"", name);
exit(-1);
}
EpepCoffSymbol *auxes = cvec_EpepCoffSymbol_new(1);
size_t index = number_of_symbols;
for (size_t aux_i = 0; aux_i < sym.symbol.NumberOfAuxSymbols; aux_i++) {
EpepCoffSymbol aux = { 0 };
if (!epep_get_symbol_by_index(epep, &aux, sym_i + aux_i)) {
ERROR_EPEP(epep);
}
cvec_EpepCoffSymbol_push_back(&auxes, aux);
number_of_symbols++;
}
Symbol new_sym = { sym, auxes, strdup(name), i, index };
if (!cdict_CStr_Symbol_add_vv(&symtab, strdup(name), new_sym, CDICT_NO_CHECK)) {
ERROR_CDICT(&symtab);
}
number_of_symbols++;
printf(" Symbol #%u: %s (%u auxes, #%u)\n", sym_i, name, cvec_EpepCoffSymbol_size(&auxes), number_of_symbols - 1);
add_name_to_set(strdup(name), &sym_name_set);
}
sym_i += sym.symbol.NumberOfAuxSymbols;
}
printf(" }\n");
// Set section offsets and fill unique section name set
printf(" Sections {\n");
for (size_t sec_i = 0; sec_i < epep->coffFileHeader.NumberOfSections; sec_i++) {
EpepSectionHeader sh = { 0 };
if (!epep_get_section_header_by_index(epep, &sh, sec_i)) {
ERROR_EPEP(epep);
}
size_t name_max = 1024;
char name[name_max];
if (sh.Name[0] == '/') {
strcpy(name, &strtab[atoi(&sh.Name[1])]);
} else {
memcpy(name, sh.Name, 8);
name[8] = '\0';
}
add_name_to_set(strdup(name), &section_names_set);
SectionInfo si = cdict_CStr_SectionInfo_get_v(&info_per_section, name);
if (si.source == NULL) {
si.source = cvec_ObjIdSecId_new(32);
}
size_t sec_offset = si.size;
cvec_size_t_push_back(&objects[i].section_offsets, sec_offset);
si.size += sh.SizeOfRawData;
si.characteristics |= sh.Characteristics;
si.number_of_relocations += sh.NumberOfRelocations;
cvec_ObjIdSecId_push_back(&si.source, (ObjIdSecId){ i, sec_i });
cdict_CStr_SectionInfo_add_vv(&info_per_section, strdup(name), si, CDICT_REPLACE_EXIST);
printf(" Section #%llu {\n", sec_i);
printf(" Name: %s\n", name);
printf(" Virtual Address: %u\n", sh.VirtualAddress);
printf(" Characteristics: %08x\n", sh.Characteristics);
printf(" Offset in the big section: %u\n", objects[i].section_offsets[sec_i]);
printf(" }\n");
}
printf(" }\n");
printf("}\n");
}
ObjectIr ir;
ir.objects = objects;
ir.section_names_set = section_names_set;
ir.info_per_section = info_per_section;
ir.symtab = symtab;
ir.sym_name_set = sym_name_set;
ir.number_of_symbols = number_of_symbols;
return ir;
}
int main(int argc, char **argv) {
ObjectIr ir = parse_objects(argc, argv);
build(&ir);
return 0;
}
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