/* * TCCPE.C - PE file output for the Tiny C Compiler * * Copyright (c) 2005-2007 grischka * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #ifdef TCC_TARGET_PE #define ST_FN static #define ST_DATA static #define PUB_FN #ifndef _WIN32 #define stricmp strcasecmp #define strnicmp strncasecmp #endif #ifndef MAX_PATH #define MAX_PATH 260 #endif #define PE_MERGE_DATA // #define PE_PRINT_SECTIONS /* ----------------------------------------------------------- */ #ifndef IMAGE_NT_SIGNATURE /* ----------------------------------------------------------- */ /* definitions below are from winnt.h */ typedef unsigned char BYTE; typedef unsigned short WORD; typedef unsigned long DWORD; #pragma pack(push, 1) typedef struct _IMAGE_DOS_HEADER { /* DOS .EXE header */ WORD e_magic; /* Magic number */ WORD e_cblp; /* Bytes on last page of file */ WORD e_cp; /* Pages in file */ WORD e_crlc; /* Relocations */ WORD e_cparhdr; /* Size of header in paragraphs */ WORD e_minalloc; /* Minimum extra paragraphs needed */ WORD e_maxalloc; /* Maximum extra paragraphs needed */ WORD e_ss; /* Initial (relative) SS value */ WORD e_sp; /* Initial SP value */ WORD e_csum; /* Checksum */ WORD e_ip; /* Initial IP value */ WORD e_cs; /* Initial (relative) CS value */ WORD e_lfarlc; /* File address of relocation table */ WORD e_ovno; /* Overlay number */ WORD e_res[4]; /* Reserved words */ WORD e_oemid; /* OEM identifier (for e_oeminfo) */ WORD e_oeminfo; /* OEM information; e_oemid specific */ WORD e_res2[10]; /* Reserved words */ DWORD e_lfanew; /* File address of new exe header */ } IMAGE_DOS_HEADER, *PIMAGE_DOS_HEADER; #define IMAGE_NT_SIGNATURE 0x00004550 /* PE00 */ #define SIZE_OF_NT_SIGNATURE 4 typedef struct _IMAGE_FILE_HEADER { WORD Machine; WORD NumberOfSections; DWORD TimeDateStamp; DWORD PointerToSymbolTable; DWORD NumberOfSymbols; WORD SizeOfOptionalHeader; WORD Characteristics; } IMAGE_FILE_HEADER, *PIMAGE_FILE_HEADER; #define IMAGE_SIZEOF_FILE_HEADER 20 typedef struct _IMAGE_DATA_DIRECTORY { DWORD VirtualAddress; DWORD Size; } IMAGE_DATA_DIRECTORY, *PIMAGE_DATA_DIRECTORY; typedef struct _IMAGE_OPTIONAL_HEADER { /* Standard fields. */ WORD Magic; BYTE MajorLinkerVersion; BYTE MinorLinkerVersion; DWORD SizeOfCode; DWORD SizeOfInitializedData; DWORD SizeOfUninitializedData; DWORD AddressOfEntryPoint; DWORD BaseOfCode; DWORD BaseOfData; /* NT additional fields. */ DWORD ImageBase; DWORD SectionAlignment; DWORD FileAlignment; WORD MajorOperatingSystemVersion; WORD MinorOperatingSystemVersion; WORD MajorImageVersion; WORD MinorImageVersion; WORD MajorSubsystemVersion; WORD MinorSubsystemVersion; DWORD Win32VersionValue; DWORD SizeOfImage; DWORD SizeOfHeaders; DWORD CheckSum; WORD Subsystem; WORD DllCharacteristics; DWORD SizeOfStackReserve; DWORD SizeOfStackCommit; DWORD SizeOfHeapReserve; DWORD SizeOfHeapCommit; DWORD LoaderFlags; DWORD NumberOfRvaAndSizes; IMAGE_DATA_DIRECTORY DataDirectory[16]; } IMAGE_OPTIONAL_HEADER, *PIMAGE_OPTIONAL_HEADER; #define IMAGE_DIRECTORY_ENTRY_EXPORT 0 /* Export Directory */ #define IMAGE_DIRECTORY_ENTRY_IMPORT 1 /* Import Directory */ #define IMAGE_DIRECTORY_ENTRY_RESOURCE 2 /* Resource Directory */ #define IMAGE_DIRECTORY_ENTRY_EXCEPTION 3 /* Exception Directory */ #define IMAGE_DIRECTORY_ENTRY_SECURITY 4 /* Security Directory */ #define IMAGE_DIRECTORY_ENTRY_BASERELOC 5 /* Base Relocation Table */ #define IMAGE_DIRECTORY_ENTRY_DEBUG 6 /* Debug Directory */ /* IMAGE_DIRECTORY_ENTRY_COPYRIGHT 7 (X86 usage) */ #define IMAGE_DIRECTORY_ENTRY_ARCHITECTURE 7 /* Architecture Specific Data */ #define IMAGE_DIRECTORY_ENTRY_GLOBALPTR 8 /* RVA of GP */ #define IMAGE_DIRECTORY_ENTRY_TLS 9 /* TLS Directory */ #define IMAGE_DIRECTORY_ENTRY_LOAD_CONFIG 10 /* Load Configuration Directory */ #define IMAGE_DIRECTORY_ENTRY_BOUND_IMPORT 11 /* Bound Import Directory in headers */ #define IMAGE_DIRECTORY_ENTRY_IAT 12 /* Import Address Table */ #define IMAGE_DIRECTORY_ENTRY_DELAY_IMPORT 13 /* Delay Load Import Descriptors */ #define IMAGE_DIRECTORY_ENTRY_COM_DESCRIPTOR 14 /* COM Runtime descriptor */ /* Section header format. */ #define IMAGE_SIZEOF_SHORT_NAME 8 typedef struct _IMAGE_SECTION_HEADER { BYTE Name[IMAGE_SIZEOF_SHORT_NAME]; union { DWORD PhysicalAddress; DWORD VirtualSize; } Misc; DWORD VirtualAddress; DWORD SizeOfRawData; DWORD PointerToRawData; DWORD PointerToRelocations; DWORD PointerToLinenumbers; WORD NumberOfRelocations; WORD NumberOfLinenumbers; DWORD Characteristics; } IMAGE_SECTION_HEADER, *PIMAGE_SECTION_HEADER; #define IMAGE_SIZEOF_SECTION_HEADER 40 typedef struct _IMAGE_BASE_RELOCATION { DWORD VirtualAddress; DWORD SizeOfBlock; // WORD TypeOffset[1]; } IMAGE_BASE_RELOCATION; #define IMAGE_SIZEOF_BASE_RELOCATION 8 #define IMAGE_REL_BASED_ABSOLUTE 0 #define IMAGE_REL_BASED_HIGH 1 #define IMAGE_REL_BASED_LOW 2 #define IMAGE_REL_BASED_HIGHLOW 3 #define IMAGE_REL_BASED_HIGHADJ 4 #define IMAGE_REL_BASED_MIPS_JMPADDR 5 #define IMAGE_REL_BASED_SECTION 6 #define IMAGE_REL_BASED_REL32 7 #pragma pack(pop) /* ----------------------------------------------------------- */ #endif /* ndef IMAGE_NT_SIGNATURE */ /* ----------------------------------------------------------- */ #pragma pack(push, 1) struct pe_header { IMAGE_DOS_HEADER doshdr; BYTE dosstub[0x40]; DWORD nt_sig; IMAGE_FILE_HEADER filehdr; IMAGE_OPTIONAL_HEADER opthdr; }; struct pe_import_header { DWORD first_entry; DWORD time_date; DWORD forwarder; DWORD lib_name_offset; DWORD first_thunk; }; struct pe_export_header { DWORD Characteristics; DWORD TimeDateStamp; DWORD Version; DWORD Name; DWORD Base; DWORD NumberOfFunctions; DWORD NumberOfNames; DWORD AddressOfFunctions; DWORD AddressOfNames; DWORD AddressOfNameOrdinals; }; struct pe_reloc_header { DWORD offset; DWORD size; }; struct pe_rsrc_header { struct _IMAGE_FILE_HEADER filehdr; struct _IMAGE_SECTION_HEADER sectionhdr; }; struct pe_rsrc_reloc { DWORD offset; DWORD size; WORD type; }; #pragma pack(pop) /* ----------------------------------------------------------- */ ST_DATA struct pe_header pe_header = { { /* IMAGE_DOS_HEADER doshdr */ 0x5A4D, /*WORD e_magic; Magic number */ 0x0090, /*WORD e_cblp; Bytes on last page of file */ 0x0003, /*WORD e_cp; Pages in file */ 0x0000, /*WORD e_crlc; Relocations */ 0x0004, /*WORD e_cparhdr; Size of header in paragraphs */ 0x0000, /*WORD e_minalloc; Minimum extra paragraphs needed */ 0xFFFF, /*WORD e_maxalloc; Maximum extra paragraphs needed */ 0x0000, /*WORD e_ss; Initial (relative) SS value */ 0x00B8, /*WORD e_sp; Initial SP value */ 0x0000, /*WORD e_csum; Checksum */ 0x0000, /*WORD e_ip; Initial IP value */ 0x0000, /*WORD e_cs; Initial (relative) CS value */ 0x0040, /*WORD e_lfarlc; File address of relocation table */ 0x0000, /*WORD e_ovno; Overlay number */ {0,0,0,0}, /*WORD e_res[4]; Reserved words */ 0x0000, /*WORD e_oemid; OEM identifier (for e_oeminfo) */ 0x0000, /*WORD e_oeminfo; OEM information; e_oemid specific */ {0,0,0,0,0,0,0,0,0,0}, /*WORD e_res2[10]; Reserved words */ 0x00000080 /*DWORD e_lfanew; File address of new exe header */ },{ /* BYTE dosstub[0x40] */ /* 14 code bytes + "This program cannot be run in DOS mode.\r\r\n$" + 6 * 0x00 */ 0x0e,0x1f,0xba,0x0e,0x00,0xb4,0x09,0xcd,0x21,0xb8,0x01,0x4c,0xcd,0x21,0x54,0x68, 0x69,0x73,0x20,0x70,0x72,0x6f,0x67,0x72,0x61,0x6d,0x20,0x63,0x61,0x6e,0x6e,0x6f, 0x74,0x20,0x62,0x65,0x20,0x72,0x75,0x6e,0x20,0x69,0x6e,0x20,0x44,0x4f,0x53,0x20, 0x6d,0x6f,0x64,0x65,0x2e,0x0d,0x0d,0x0a,0x24,0x00,0x00,0x00,0x00,0x00,0x00,0x00, }, 0x00004550, /* DWORD nt_sig = IMAGE_NT_SIGNATURE */ { /* IMAGE_FILE_HEADER filehdr */ 0x014C, /*WORD Machine; */ 0x0003, /*WORD NumberOfSections; */ 0x00000000, /*DWORD TimeDateStamp; */ 0x00000000, /*DWORD PointerToSymbolTable; */ 0x00000000, /*DWORD NumberOfSymbols; */ 0x00E0, /*WORD SizeOfOptionalHeader; */ 0x030F /*WORD Characteristics; */ },{ /* IMAGE_OPTIONAL_HEADER opthdr */ /* Standard fields. */ 0x010B, /*WORD Magic; */ 0x06, /*BYTE MajorLinkerVersion; */ 0x00, /*BYTE MinorLinkerVersion; */ 0x00000000, /*DWORD SizeOfCode; */ 0x00000000, /*DWORD SizeOfInitializedData; */ 0x00000000, /*DWORD SizeOfUninitializedData; */ 0x00000000, /*DWORD AddressOfEntryPoint; */ 0x00000000, /*DWORD BaseOfCode; */ 0x00000000, /*DWORD BaseOfData; */ /* NT additional fields. */ 0x00400000, /*DWORD ImageBase; */ 0x00001000, /*DWORD SectionAlignment; */ 0x00000200, /*DWORD FileAlignment; */ 0x0004, /*WORD MajorOperatingSystemVersion; */ 0x0000, /*WORD MinorOperatingSystemVersion; */ 0x0000, /*WORD MajorImageVersion; */ 0x0000, /*WORD MinorImageVersion; */ 0x0004, /*WORD MajorSubsystemVersion; */ 0x0000, /*WORD MinorSubsystemVersion; */ 0x00000000, /*DWORD Win32VersionValue; */ 0x00000000, /*DWORD SizeOfImage; */ 0x00000200, /*DWORD SizeOfHeaders; */ 0x00000000, /*DWORD CheckSum; */ 0x0002, /*WORD Subsystem; */ 0x0000, /*WORD DllCharacteristics; */ 0x00100000, /*DWORD SizeOfStackReserve; */ 0x00001000, /*DWORD SizeOfStackCommit; */ 0x00100000, /*DWORD SizeOfHeapReserve; */ 0x00001000, /*DWORD SizeOfHeapCommit; */ 0x00000000, /*DWORD LoaderFlags; */ 0x00000010, /*DWORD NumberOfRvaAndSizes; */ /* IMAGE_DATA_DIRECTORY DataDirectory[16]; */ {{0,0}, {0,0}, {0,0}, {0,0}, {0,0}, {0,0}, {0,0}, {0,0}, {0,0}, {0,0}, {0,0}, {0,0}, {0,0}, {0,0}, {0,0}, {0,0}} }}; /* ------------------------------------------------------------- */ /* internal temporary structures */ /* #define IMAGE_SCN_CNT_CODE 0x00000020 #define IMAGE_SCN_CNT_INITIALIZED_DATA 0x00000040 #define IMAGE_SCN_CNT_UNINITIALIZED_DATA 0x00000080 #define IMAGE_SCN_MEM_DISCARDABLE 0x02000000 #define IMAGE_SCN_MEM_SHARED 0x10000000 #define IMAGE_SCN_MEM_EXECUTE 0x20000000 #define IMAGE_SCN_MEM_READ 0x40000000 #define IMAGE_SCN_MEM_WRITE 0x80000000 */ enum { sec_text = 0, sec_data , sec_bss , sec_idata , sec_other , sec_rsrc , sec_stab , sec_reloc , sec_last }; ST_DATA DWORD pe_sec_flags[] = { 0x60000020, /* ".text" , */ 0xC0000040, /* ".data" , */ 0xC0000080, /* ".bss" , */ 0x40000040, /* ".idata" , */ 0xE0000060, /* < other > , */ 0x40000040, /* ".rsrc" , */ 0x42000802, /* ".stab" , */ 0x42000040, /* ".reloc" , */ }; struct section_info { int cls, ord; char name[32]; DWORD sh_addr; DWORD sh_size; DWORD sh_flags; unsigned char *data; DWORD data_size; IMAGE_SECTION_HEADER ish; }; struct import_symbol { int sym_index; int iat_index; int thk_offset; }; struct pe_import_info { int dll_index; int sym_count; struct import_symbol **symbols; }; struct pe_info { TCCState *s1; Section *reloc; Section *thunk; const char *filename; int type; DWORD sizeofheaders; DWORD imagebase; DWORD start_addr; DWORD imp_offs; DWORD imp_size; DWORD iat_offs; DWORD iat_size; DWORD exp_offs; DWORD exp_size; struct section_info *sec_info; int sec_count; struct pe_import_info **imp_info; int imp_count; }; /* ------------------------------------------------------------- */ #define PE_NUL 0 #define PE_DLL 1 #define PE_GUI 2 #define PE_EXE 3 void error_noabort(const char *, ...); #ifdef _WIN32 void dbg_printf (const char *fmt, ...) { char buffer[4000]; va_list arg; int x; va_start(arg, fmt); x = vsprintf (buffer, fmt, arg); strcpy(buffer+x, "\n"); OutputDebugString(buffer); } #endif /* --------------------------------------------*/ ST_FN const char* get_alt_symbol(char *buffer, const char *symbol) { const char *p; p = strrchr(symbol, '@'); if (p && isnum(p[1]) && symbol[0] == '_') { /* stdcall decor */ strcpy(buffer, symbol+1)[p-symbol-1] = 0; } else if (symbol[0] != '_') { /* try non-ansi function */ buffer[0] = '_', strcpy(buffer + 1, symbol); } else if (0 == memcmp(symbol, "__imp__", 7)) { /* mingw 2.0 */ strcpy(buffer, symbol + 6); } else if (0 == memcmp(symbol, "_imp___", 7)) { /* mingw 3.7 */ strcpy(buffer, symbol + 6); } else { return symbol; } return buffer; } ST_FN int pe_find_import(TCCState * s1, const char *symbol) { char buffer[200]; const char *s; int sym_index, n = 0; do { s = n ? get_alt_symbol(buffer, symbol) : symbol; sym_index = find_elf_sym(s1->dynsymtab_section, s); // printf("find %d %s\n", sym_index, s); } while (0 == sym_index && ++n < 2); return sym_index; } #if defined _WIN32 || defined __CYGWIN__ #ifdef __CYGWIN__ # include # define LoadLibrary(s) dlopen(s, RTLD_NOW) # define GetProcAddress(h,s) dlsym(h, s) #else # define dlclose(h) FreeLibrary(h) #endif /* for the -run option: dynamically load symbol from dll */ void *resolve_sym(struct TCCState *s1, const char *symbol, int type) { char buffer[100]; int sym_index, dll_index; void *addr, **m; DLLReference *dllref; sym_index = pe_find_import(s1, symbol); if (0 == sym_index) return NULL; dll_index = ((Elf32_Sym *)s1->dynsymtab_section->data + sym_index)->st_value; dllref = s1->loaded_dlls[dll_index-1]; if ( !dllref->handle ) { dllref->handle = LoadLibrary(dllref->name); } addr = GetProcAddress(dllref->handle, symbol); if (NULL == addr) addr = GetProcAddress(dllref->handle, get_alt_symbol(buffer, symbol)); if (addr && STT_OBJECT == type) { /* need to return a pointer to the address for data objects */ m = (void**)tcc_malloc(sizeof addr), *m = addr, addr = m; #ifdef MEM_DEBUG /* yep, we don't free it */ mem_cur_size -= sizeof (void*); #endif } return addr; } #endif /*----------------------------------------------------------------------------*/ ST_FN int dynarray_assoc(void **pp, int n, int key) { int i; for (i = 0; i < n; ++i, ++pp) if (key == **(int **) pp) return i; return -1; } #if 0 ST_FN DWORD umin(DWORD a, DWORD b) { return a < b ? a : b; } #endif ST_FN DWORD umax(DWORD a, DWORD b) { return a < b ? b : a; } ST_FN void pe_fpad(FILE *fp, DWORD new_pos) { DWORD pos = ftell(fp); while (++pos <= new_pos) fputc(0, fp); } ST_FN DWORD pe_file_align(DWORD n) { return (n + (0x200 - 1)) & ~(0x200 - 1); } ST_FN DWORD pe_virtual_align(DWORD n) { return (n + (0x1000 - 1)) & ~(0x1000 - 1); } ST_FN void pe_align_section(Section *s, int a) { int i = s->data_offset & (a-1); if (i) section_ptr_add(s, a - i); } ST_FN void pe_set_datadir(int dir, DWORD addr, DWORD size) { pe_header.opthdr.DataDirectory[dir].VirtualAddress = addr; pe_header.opthdr.DataDirectory[dir].Size = size; } /*----------------------------------------------------------------------------*/ ST_FN int pe_write(struct pe_info *pe) { int i; FILE *op; DWORD file_offset, r; op = fopen(pe->filename, "wb"); if (NULL == op) { error_noabort("could not write '%s': %s", pe->filename, strerror(errno)); return 1; } pe->sizeofheaders = pe_file_align( sizeof pe_header + pe->sec_count * sizeof (IMAGE_SECTION_HEADER) ); file_offset = pe->sizeofheaders; pe_fpad(op, file_offset); if (2 == pe->s1->verbose) printf("-------------------------------" "\n virt file size section" "\n"); for (i = 0; i < pe->sec_count; ++i) { struct section_info *si = pe->sec_info + i; const char *sh_name = si->name; unsigned long addr = si->sh_addr - pe->imagebase; unsigned long size = si->sh_size; IMAGE_SECTION_HEADER *psh = &si->ish; if (2 == pe->s1->verbose) printf("%6lx %6lx %6lx %s\n", addr, file_offset, size, sh_name); switch (si->cls) { case sec_text: pe_header.opthdr.BaseOfCode = addr; pe_header.opthdr.AddressOfEntryPoint = addr + pe->start_addr; break; case sec_data: pe_header.opthdr.BaseOfData = addr; break; case sec_bss: break; case sec_reloc: pe_set_datadir(IMAGE_DIRECTORY_ENTRY_BASERELOC, addr, size); break; case sec_rsrc: pe_set_datadir(IMAGE_DIRECTORY_ENTRY_RESOURCE, addr, size); break; case sec_stab: break; } if (pe->thunk == pe->s1->sections[si->ord]) { if (pe->imp_size) { pe_set_datadir(IMAGE_DIRECTORY_ENTRY_IMPORT, pe->imp_offs + addr, pe->imp_size); pe_set_datadir(IMAGE_DIRECTORY_ENTRY_IAT, pe->iat_offs + addr, pe->iat_size); } if (pe->exp_size) { pe_set_datadir(IMAGE_DIRECTORY_ENTRY_EXPORT, pe->exp_offs + addr, pe->exp_size); } } strcpy((char*)psh->Name, sh_name); psh->Characteristics = pe_sec_flags[si->cls]; psh->VirtualAddress = addr; psh->Misc.VirtualSize = size; pe_header.opthdr.SizeOfImage = umax(pe_virtual_align(size + addr), pe_header.opthdr.SizeOfImage); if (si->data_size) { psh->PointerToRawData = r = file_offset; fwrite(si->data, 1, si->data_size, op); file_offset = pe_file_align(file_offset + si->data_size); psh->SizeOfRawData = file_offset - r; pe_fpad(op, file_offset); } } // pe_header.filehdr.TimeDateStamp = time(NULL); pe_header.filehdr.NumberOfSections = pe->sec_count; pe_header.opthdr.SizeOfHeaders = pe->sizeofheaders; pe_header.opthdr.ImageBase = pe->imagebase; if (PE_DLL == pe->type) pe_header.filehdr.Characteristics = 0x230E; else if (PE_GUI != pe->type) pe_header.opthdr.Subsystem = 3; fseek(op, SEEK_SET, 0); fwrite(&pe_header, 1, sizeof pe_header, op); for (i = 0; i < pe->sec_count; ++i) fwrite(&pe->sec_info[i].ish, 1, sizeof(IMAGE_SECTION_HEADER), op); fclose (op); if (2 == pe->s1->verbose) printf("-------------------------------\n"); if (pe->s1->verbose) printf("<- %s (%lu bytes)\n", pe->filename, file_offset); return 0; } /*----------------------------------------------------------------------------*/ ST_FN struct import_symbol *pe_add_import(struct pe_info *pe, int sym_index) { int i; int dll_index; struct pe_import_info *p; struct import_symbol *s; dll_index = ((Elf32_Sym *)pe->s1->dynsymtab_section->data + sym_index)->st_value; if (0 == dll_index) return NULL; i = dynarray_assoc ((void**)pe->imp_info, pe->imp_count, dll_index); if (-1 != i) { p = pe->imp_info[i]; goto found_dll; } p = tcc_mallocz(sizeof *p); p->dll_index = dll_index; dynarray_add((void***)&pe->imp_info, &pe->imp_count, p); found_dll: i = dynarray_assoc ((void**)p->symbols, p->sym_count, sym_index); if (-1 != i) return p->symbols[i]; s = tcc_mallocz(sizeof *s); dynarray_add((void***)&p->symbols, &p->sym_count, s); s->sym_index = sym_index; return s; } /*----------------------------------------------------------------------------*/ ST_FN void pe_build_imports(struct pe_info *pe) { int thk_ptr, ent_ptr, dll_ptr, sym_cnt, i; DWORD rva_base = pe->thunk->sh_addr - pe->imagebase; int ndlls = pe->imp_count; for (sym_cnt = i = 0; i < ndlls; ++i) sym_cnt += pe->imp_info[i]->sym_count; if (0 == sym_cnt) return; pe_align_section(pe->thunk, 16); pe->imp_offs = dll_ptr = pe->thunk->data_offset; pe->imp_size = (ndlls + 1) * sizeof(struct pe_import_header); pe->iat_offs = dll_ptr + pe->imp_size; pe->iat_size = (sym_cnt + ndlls) * sizeof(DWORD); section_ptr_add(pe->thunk, pe->imp_size + 2*pe->iat_size); thk_ptr = pe->iat_offs; ent_ptr = pe->iat_offs + pe->iat_size; for (i = 0; i < pe->imp_count; ++i) { struct pe_import_header *hdr; int k, n, v; struct pe_import_info *p = pe->imp_info[i]; const char *name = pe->s1->loaded_dlls[p->dll_index-1]->name; /* put the dll name into the import header */ v = put_elf_str(pe->thunk, name); hdr = (struct pe_import_header*)(pe->thunk->data + dll_ptr); hdr->first_thunk = thk_ptr + rva_base; hdr->first_entry = ent_ptr + rva_base; hdr->lib_name_offset = v + rva_base; for (k = 0, n = p->sym_count; k <= n; ++k) { if (k < n) { DWORD iat_index = p->symbols[k]->iat_index; int sym_index = p->symbols[k]->sym_index; Elf32_Sym *imp_sym = (Elf32_Sym *)pe->s1->dynsymtab_section->data + sym_index; Elf32_Sym *org_sym = (Elf32_Sym *)symtab_section->data + iat_index; const char *name = pe->s1->dynsymtab_section->link->data + imp_sym->st_name; org_sym->st_value = thk_ptr; org_sym->st_shndx = pe->thunk->sh_num; v = pe->thunk->data_offset + rva_base; section_ptr_add(pe->thunk, sizeof(WORD)); /* hint, not used */ put_elf_str(pe->thunk, name); } else { v = 0; /* last entry is zero */ } *(DWORD*)(pe->thunk->data+thk_ptr) = *(DWORD*)(pe->thunk->data+ent_ptr) = v; thk_ptr += sizeof (DWORD); ent_ptr += sizeof (DWORD); } dll_ptr += sizeof(struct pe_import_header); dynarray_reset(&p->symbols, &p->sym_count); } dynarray_reset(&pe->imp_info, &pe->imp_count); } /* ------------------------------------------------------------- */ /* For now only functions are exported. Export of data would work, but import requires compiler support to do an additional indirection. For instance: __declspec(dllimport) extern int something; needs to be translated to: *(int*)something */ ST_FN int sym_cmp(const void *va, const void *vb) { const char *ca = ((const char **)va)[1]; const char *cb = ((const char **)vb)[1]; return strcmp(ca, cb); } ST_FN void pe_build_exports(struct pe_info *pe) { Elf32_Sym *sym; int sym_index, sym_end; DWORD rva_base, func_o, name_o, ord_o, str_o; struct pe_export_header *hdr; int sym_count, n, ord, *sorted, *sp; FILE *op; char buf[MAX_PATH]; const char *dllname; const char *name; rva_base = pe->thunk->sh_addr - pe->imagebase; sym_count = 0, n = 1, sorted = NULL, op = NULL; sym_end = symtab_section->data_offset / sizeof(Elf32_Sym); for (sym_index = 1; sym_index < sym_end; ++sym_index) { sym = (Elf32_Sym*)symtab_section->data + sym_index; name = symtab_section->link->data + sym->st_name; if ((sym->st_other & 1) /* export only symbols from actually written sections */ && pe->s1->sections[sym->st_shndx]->sh_addr) { dynarray_add((void***)&sorted, &sym_count, (void*)n); dynarray_add((void***)&sorted, &sym_count, (void*)name); } ++n; #if 0 if (sym->st_other & 1) printf("export: %s\n", name); if (sym->st_other & 2) printf("stdcall: %s\n", name); #endif } if (0 == sym_count) return; sym_count /= 2; qsort (sorted, sym_count, 2 * sizeof sorted[0], sym_cmp); pe_align_section(pe->thunk, 16); dllname = tcc_basename(pe->filename); pe->exp_offs = pe->thunk->data_offset; func_o = pe->exp_offs + sizeof(struct pe_export_header); name_o = func_o + sym_count * sizeof (DWORD); ord_o = name_o + sym_count * sizeof (DWORD); str_o = ord_o + sym_count * sizeof(WORD); hdr = section_ptr_add(pe->thunk, str_o - pe->exp_offs); hdr->Characteristics = 0; hdr->Base = 1; hdr->NumberOfFunctions = sym_count; hdr->NumberOfNames = sym_count; hdr->AddressOfFunctions = func_o + rva_base; hdr->AddressOfNames = name_o + rva_base; hdr->AddressOfNameOrdinals = ord_o + rva_base; hdr->Name = str_o + rva_base; put_elf_str(pe->thunk, dllname); #if 1 /* automatically write exports to .def */ strcpy(buf, pe->filename); strcpy(tcc_fileextension(buf), ".def"); op = fopen(buf, "w"); if (NULL == op) { error_noabort("could not create '%s': %s", buf, strerror(errno)); } else { fprintf(op, "LIBRARY %s\n\nEXPORTS\n", dllname); if (pe->s1->verbose) printf("<- %s (%d symbols)\n", buf, sym_count); } #endif for (sp = sorted, ord = 0; ord < sym_count; ++ord, sp += 2) { sym_index = sp[0], name = (const char *)sp[1]; /* insert actual address later in pe_relocate_rva */ put_elf_reloc(symtab_section, pe->thunk, func_o, R_386_RELATIVE, sym_index); *(DWORD*)(pe->thunk->data + name_o) = pe->thunk->data_offset + rva_base; *(WORD*)(pe->thunk->data + ord_o) = ord; put_elf_str(pe->thunk, name); func_o += sizeof (DWORD); name_o += sizeof (DWORD); ord_o += sizeof (WORD); if (op) fprintf(op, "%s\n", name); } pe->exp_size = pe->thunk->data_offset - pe->exp_offs; tcc_free(sorted); if(op) fclose(op); } /* ------------------------------------------------------------- */ ST_FN void pe_build_reloc (struct pe_info *pe) { DWORD offset, block_ptr, addr; int count, i; Elf32_Rel *rel, *rel_end; Section *s = NULL, *sr; offset = addr = block_ptr = count = i = 0; rel = rel_end = NULL; for(;;) { if (rel < rel_end) { int type = ELF32_R_TYPE(rel->r_info); addr = rel->r_offset + s->sh_addr; ++ rel; if (type != R_386_32) continue; if (count == 0) { /* new block */ block_ptr = pe->reloc->data_offset; section_ptr_add(pe->reloc, sizeof(struct pe_reloc_header)); offset = addr & 0xFFFFFFFF<<12; } if ((addr -= offset) < (1<<12)) { /* one block spans 4k addresses */ WORD *wp = section_ptr_add(pe->reloc, sizeof (WORD)); *wp = addr | IMAGE_REL_BASED_HIGHLOW<<12; ++count; continue; } -- rel; } else if (i < pe->sec_count) { sr = (s = pe->s1->sections[pe->sec_info[i++].ord])->reloc; if (sr) { rel = (Elf32_Rel *)sr->data; rel_end = (Elf32_Rel *)(sr->data + sr->data_offset); } continue; } if (count) { /* store the last block and ready for a new one */ struct pe_reloc_header *hdr; if (count & 1) /* align for DWORDS */ section_ptr_add(pe->reloc, sizeof(WORD)), ++count; hdr = (struct pe_reloc_header *)(pe->reloc->data + block_ptr); hdr -> offset = offset - pe->imagebase; hdr -> size = count * sizeof(WORD) + sizeof(struct pe_reloc_header); count = 0; } if (rel >= rel_end) break; } } /* ------------------------------------------------------------- */ ST_FN int pe_section_class(Section *s) { int type, flags; const char *name; type = s->sh_type; flags = s->sh_flags; name = s->name; if (flags & SHF_ALLOC) { if (type == SHT_PROGBITS) { if (flags & SHF_EXECINSTR) return sec_text; if (flags & SHF_WRITE) return sec_data; if (0 == strcmp(name, ".rsrc")) return sec_rsrc; if (0 == strcmp(name, ".iedat")) return sec_idata; return sec_other; } else if (type == SHT_NOBITS) { if (flags & SHF_WRITE) return sec_bss; } } else { if (0 == strcmp(name, ".reloc")) return sec_reloc; if (0 == strncmp(name, ".stab", 5)) /* .stab and .stabstr */ return sec_stab; } return -1; } ST_FN int pe_assign_addresses (struct pe_info *pe) { int i, k, o, c; DWORD addr; int *section_order; struct section_info *si; Section *s; // pe->thunk = new_section(pe->s1, ".iedat", SHT_PROGBITS, SHF_ALLOC); section_order = tcc_malloc(pe->s1->nb_sections * sizeof (int)); for (o = k = 0 ; k < sec_last; ++k) { for (i = 1; i < pe->s1->nb_sections; ++i) { s = pe->s1->sections[i]; if (k == pe_section_class(s)) { // printf("%s %d\n", s->name, k); s->sh_addr = pe->imagebase; section_order[o++] = i; } } } pe->sec_info = tcc_mallocz(o * sizeof (struct section_info)); addr = pe->imagebase + 1; for (i = 0; i < o; ++i) { k = section_order[i]; s = pe->s1->sections[k]; c = pe_section_class(s); si = &pe->sec_info[pe->sec_count]; #ifdef PE_MERGE_DATA if (c == sec_bss && pe->sec_count && si[-1].cls == sec_data) { /* append .bss to .data */ s->sh_addr = addr = ((addr-1) | 15) + 1; addr += s->data_offset; si[-1].sh_size = addr - si[-1].sh_addr; continue; } #endif strcpy(si->name, s->name); si->cls = c; si->ord = k; si->sh_addr = s->sh_addr = addr = pe_virtual_align(addr); si->sh_flags = s->sh_flags; if (c == sec_data && NULL == pe->thunk) pe->thunk = s; if (s == pe->thunk) { pe_build_imports(pe); pe_build_exports(pe); } if (c == sec_reloc) pe_build_reloc (pe); if (s->data_offset) { if (s->sh_type != SHT_NOBITS) { si->data = s->data; si->data_size = s->data_offset; } addr += s->data_offset; si->sh_size = s->data_offset; ++pe->sec_count; } // printf("%08x %05x %s\n", si->sh_addr, si->sh_size, si->name); } #if 0 for (i = 1; i < pe->s1->nb_sections; ++i) { Section *s = pe->s1->sections[i]; int type = s->sh_type; int flags = s->sh_flags; printf("section %-16s %-10s %5x %s,%s,%s\n", s->name, type == SHT_PROGBITS ? "progbits" : type == SHT_NOBITS ? "nobits" : type == SHT_SYMTAB ? "symtab" : type == SHT_STRTAB ? "strtab" : type == SHT_REL ? "rel" : "???", s->data_offset, flags & SHF_ALLOC ? "alloc" : "", flags & SHF_WRITE ? "write" : "", flags & SHF_EXECINSTR ? "exec" : "" ); } pe->s1->verbose = 2; #endif tcc_free(section_order); return 0; } /* ------------------------------------------------------------- */ ST_FN void pe_relocate_rva (struct pe_info *pe, Section *s) { Section *sr = s->reloc; Elf32_Rel *rel, *rel_end; rel_end = (Elf32_Rel *)(sr->data + sr->data_offset); for(rel = (Elf32_Rel *)sr->data; rel < rel_end; rel++) if (ELF32_R_TYPE(rel->r_info) == R_386_RELATIVE) { int sym_index = ELF32_R_SYM(rel->r_info); DWORD addr = s->sh_addr; if (sym_index) { Elf32_Sym *sym = (Elf32_Sym *)symtab_section->data + sym_index; addr = sym->st_value; } *(DWORD*)(s->data + rel->r_offset) += addr - pe->imagebase; } } /*----------------------------------------------------------------------------*/ ST_FN int pe_check_symbols(struct pe_info *pe) { Elf32_Sym *sym; int sym_index, sym_end; int ret = 0; pe_align_section(text_section, 8); sym_end = symtab_section->data_offset / sizeof(Elf32_Sym); for (sym_index = 1; sym_index < sym_end; ++sym_index) { sym = (Elf32_Sym*)symtab_section->data + sym_index; if (sym->st_shndx == SHN_UNDEF) { const char *name = symtab_section->link->data + sym->st_name; unsigned type = ELF32_ST_TYPE(sym->st_info); int imp_sym = pe_find_import(pe->s1, name); struct import_symbol *is; if (0 == imp_sym) goto not_found; is = pe_add_import(pe, imp_sym); if (!is) goto not_found; if (type == STT_FUNC) { unsigned long offset = is->thk_offset; if (offset) { /* got aliased symbol, like stricmp and _stricmp */ } else { char buffer[100]; offset = text_section->data_offset; /* add the 'jmp IAT[x]' instruction */ *(WORD*)section_ptr_add(text_section, 8) = 0x25FF; /* add a helper symbol, will be patched later in pe_build_imports */ sprintf(buffer, "IAT.%s", name); is->iat_index = put_elf_sym( symtab_section, 0, sizeof(DWORD), ELF32_ST_INFO(STB_GLOBAL, STT_OBJECT), 0, SHN_UNDEF, buffer); put_elf_reloc(symtab_section, text_section, offset + 2, R_386_32, is->iat_index); is->thk_offset = offset; } /* tcc_realloc might have altered sym's address */ sym = (Elf32_Sym*)symtab_section->data + sym_index; /* patch the original symbol */ sym->st_value = offset; sym->st_shndx = text_section->sh_num; sym->st_other &= ~1; /* do not export */ continue; } if (type == STT_OBJECT) { /* data, ptr to that should be */ if (0 == is->iat_index) { /* original symbol will be patched later in pe_build_imports */ is->iat_index = sym_index; continue; } } not_found: error_noabort("undefined symbol '%s'", name); ret = 1; } else if (pe->s1->rdynamic && ELF32_ST_BIND(sym->st_info) != STB_LOCAL) { /* if -rdynamic option, then export all non local symbols */ sym->st_other |= 1; } } return ret; } /*----------------------------------------------------------------------------*/ #ifdef PE_PRINT_SECTIONS ST_FN void pe_print_section(FILE * f, Section * s) { /* just if you'r curious */ BYTE *p, *e, b; int i, n, l, m; p = s->data; e = s->data + s->data_offset; l = e - p; fprintf(f, "section \"%s\"", s->name); if (s->link) fprintf(f, "\nlink \"%s\"", s->link->name); if (s->reloc) fprintf(f, "\nreloc \"%s\"", s->reloc->name); fprintf(f, "\nv_addr %08X", s->sh_addr); fprintf(f, "\ncontents %08X", l); fprintf(f, "\n\n"); if (s->sh_type == SHT_NOBITS) return; if (0 == l) return; if (s->sh_type == SHT_SYMTAB) m = sizeof(Elf32_Sym); if (s->sh_type == SHT_REL) m = sizeof(Elf32_Rel); else m = 16; fprintf(f, "%-8s", "offset"); for (i = 0; i < m; ++i) fprintf(f, " %02x", i); n = 56; if (s->sh_type == SHT_SYMTAB || s->sh_type == SHT_REL) { const char *fields1[] = { "name", "value", "size", "bind", "type", "other", "shndx", NULL }; const char *fields2[] = { "offs", "type", "symb", NULL }; const char **p; if (s->sh_type == SHT_SYMTAB) p = fields1, n = 106; else p = fields2, n = 58; for (i = 0; p[i]; ++i) fprintf(f, "%6s", p[i]); fprintf(f, " symbol"); } fprintf(f, "\n"); for (i = 0; i < n; ++i) fprintf(f, "-"); fprintf(f, "\n"); for (i = 0; i < l;) { fprintf(f, "%08X", i); for (n = 0; n < m; ++n) { if (n + i < l) fprintf(f, " %02X", p[i + n]); else fprintf(f, " "); } if (s->sh_type == SHT_SYMTAB) { Elf32_Sym *sym = (Elf32_Sym *) (p + i); const char *name = s->link->data + sym->st_name; fprintf(f, " %04X %04X %04X %02X %02X %02X %04X \"%s\"", sym->st_name, sym->st_value, sym->st_size, ELF32_ST_BIND(sym->st_info), ELF32_ST_TYPE(sym->st_info), sym->st_other, sym->st_shndx, name); } else if (s->sh_type == SHT_REL) { Elf32_Rel *rel = (Elf32_Rel *) (p + i); Elf32_Sym *sym = (Elf32_Sym *) s->link->data + ELF32_R_SYM(rel->r_info); const char *name = s->link->link->data + sym->st_name; fprintf(f, " %04X %02X %04X \"%s\"", rel->r_offset, ELF32_R_TYPE(rel->r_info), ELF32_R_SYM(rel->r_info), name); } else { fprintf(f, " "); for (n = 0; n < m; ++n) { if (n + i < l) { b = p[i + n]; if (b < 32 || b >= 127) b = '.'; fprintf(f, "%c", b); } } } i += m; fprintf(f, "\n"); } fprintf(f, "\n\n"); } ST_FN void pe_print_sections(TCCState *s1, const char *fname) { Section *s; FILE *f; int i; f = fopen(fname, "wt"); for (i = 1; i < s1->nb_sections; ++i) { s = s1->sections[i]; pe_print_section(f, s); } pe_print_section(f, s1->dynsymtab_section); fclose(f); } #endif /* ------------------------------------------------------------- * This is for compiled windows resources in 'coff' format * as generated by 'windres.exe -O coff ...'. */ PUB_FN int pe_test_res_file(void *v, int size) { struct pe_rsrc_header *p = (struct pe_rsrc_header *)v; return size >= IMAGE_SIZEOF_FILE_HEADER + IMAGE_SIZEOF_SHORT_NAME /* = 28 */ && p->filehdr.Machine == 0x014C && 1 == p->filehdr.NumberOfSections && 0 == strcmp(p->sectionhdr.Name, ".rsrc") ; } ST_FN int read_n(int fd, void *ptr, unsigned size) { return size == read(fd, ptr, size); } PUB_FN int pe_load_res_file(TCCState *s1, int fd) { struct pe_rsrc_header hdr; Section *rsrc_section; int i, ret = -1; BYTE *ptr; lseek (fd, 0, SEEK_SET); if (!read_n(fd, &hdr, sizeof hdr)) goto quit; if (!pe_test_res_file(&hdr, sizeof hdr)) goto quit; rsrc_section = new_section(s1, ".rsrc", SHT_PROGBITS, SHF_ALLOC); ptr = section_ptr_add(rsrc_section, hdr.sectionhdr.SizeOfRawData); lseek (fd, hdr.sectionhdr.PointerToRawData, SEEK_SET); if (!read_n(fd, ptr, hdr.sectionhdr.SizeOfRawData)) goto quit; lseek (fd, hdr.sectionhdr.PointerToRelocations, SEEK_SET); for (i = 0; i < hdr.sectionhdr.NumberOfRelocations; ++i) { struct pe_rsrc_reloc rel; if (!read_n(fd, &rel, sizeof rel)) goto quit; // printf("rsrc_reloc: %x %x %x\n", rel.offset, rel.size, rel.type); if (rel.type != 7) /* DIR32NB */ goto quit; put_elf_reloc(symtab_section, rsrc_section, rel.offset, R_386_RELATIVE, 0); } ret = 0; quit: if (ret) error_noabort("unrecognized resource file format"); return ret; } /* ------------------------------------------------------------- */ ST_FN char *trimfront(char *p) { while (*p && (unsigned char)*p <= ' ') ++p; return p; } ST_FN char *trimback(char *a, char *e) { while (e > a && (unsigned char)e[-1] <= ' ') --e; *e = 0;; return a; } ST_FN char *get_line(char *line, int size, FILE *fp) { if (NULL == fgets(line, size, fp)) return NULL; trimback(line, strchr(line, 0)); return trimfront(line); } /* ------------------------------------------------------------- */ PUB_FN int pe_load_def_file(TCCState *s1, int fd) { DLLReference *dllref; int state = 0, ret = -1; char line[400], dllname[80], *p; FILE *fp = fdopen(dup(fd), "rb"); if (NULL == fp) goto quit; for (;;) { p = get_line(line, sizeof line, fp); if (NULL == p) break; if (0 == *p || ';' == *p) continue; switch (state) { case 0: if (0 != strnicmp(p, "LIBRARY", 7)) goto quit; strcpy(dllname, trimfront(p+7)); ++state; continue; case 1: if (0 != stricmp(p, "EXPORTS")) goto quit; ++state; continue; case 2: dllref = tcc_mallocz(sizeof(DLLReference) + strlen(dllname)); strcpy(dllref->name, dllname); dynarray_add((void ***) &s1->loaded_dlls, &s1->nb_loaded_dlls, dllref); ++state; default: add_elf_sym(s1->dynsymtab_section, s1->nb_loaded_dlls, 0, ELF32_ST_INFO(STB_GLOBAL, STT_FUNC), 0, text_section->sh_num, p); continue; } } ret = 0; quit: if (fp) fclose(fp); if (ret) error_noabort("unrecognized export definition file format"); return ret; } /* ------------------------------------------------------------- */ ST_FN void pe_add_runtime_ex(TCCState *s1, struct pe_info *pe) { const char *start_symbol; unsigned long addr = 0; int pe_type = 0; if (find_elf_sym(symtab_section, "address@hidden")) pe_type = PE_GUI; else if (TCC_OUTPUT_DLL == s1->output_type) { pe_type = PE_DLL; /* need this for 'tccelf.c:relocate_section()' */ s1->output_type = TCC_OUTPUT_EXE; } start_symbol = TCC_OUTPUT_MEMORY == s1->output_type ? PE_GUI == pe_type ? "_runwinmain" : NULL : PE_DLL == pe_type ? "address@hidden" : PE_GUI == pe_type ? "_winstart" : "_start" ; /* grab the startup code from libtcc1 */ if (start_symbol) add_elf_sym(symtab_section, 0, 0, ELF32_ST_INFO(STB_GLOBAL, STT_NOTYPE), 0, SHN_UNDEF, start_symbol); if (0 == s1->nostdlib) { tcc_add_library(s1, "tcc1"); #ifdef __CYGWIN__ tcc_add_library(s1, "cygwin1"); #else tcc_add_library(s1, "msvcrt"); #endif tcc_add_library(s1, "kernel32"); if (PE_DLL == pe_type || PE_GUI == pe_type) { tcc_add_library(s1, "user32"); tcc_add_library(s1, "gdi32"); } } if (start_symbol) { addr = (unsigned long)tcc_get_symbol_err(s1, start_symbol); if (s1->output_type == TCC_OUTPUT_MEMORY && addr) /* for -run GUI's, put '_runwinmain' instead of 'main' */ add_elf_sym(symtab_section, addr, 0, ELF32_ST_INFO(STB_GLOBAL, STT_NOTYPE), 0, text_section->sh_num, "main"); } if (pe) { pe->type = pe_type; pe->start_addr = addr; } } PUB_FN void pe_add_runtime(TCCState *s1) { pe_add_runtime_ex(s1, NULL); } PUB_FN int pe_output_file(TCCState * s1, const char *filename) { int ret; struct pe_info pe; int i; memset(&pe, 0, sizeof pe); pe.filename = filename; pe.s1 = s1; pe_add_runtime_ex(s1, &pe); relocate_common_syms(); /* assign bss adresses */ tcc_add_linker_symbols(s1); ret = pe_check_symbols(&pe); if (0 == ret) { if (PE_DLL == pe.type) { pe.reloc = new_section(pe.s1, ".reloc", SHT_PROGBITS, 0); pe.imagebase = 0x10000000; } else { pe.imagebase = 0x00400000; } pe_assign_addresses(&pe); relocate_syms(s1, 0); for (i = 1; i < s1->nb_sections; ++i) { Section *s = s1->sections[i]; if (s->reloc) { relocate_section(s1, s); pe_relocate_rva(&pe, s); } } if (s1->nb_errors) ret = 1; else ret = pe_write(&pe); tcc_free(pe.sec_info); } #ifdef PE_PRINT_SECTIONS pe_print_sections(s1, "tcc.log"); #endif return ret; } /* ------------------------------------------------------------- */ #endif /* def TCC_TARGET_PE */ /* ------------------------------------------------------------- */