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tinycc/tccpe.c

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/*
* TCCPE.C - PE file output for the TinyC Compiler
*
* Copyright (c) 2005 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
*/
typedef unsigned char BYTE;
typedef unsigned short WORD;
typedef unsigned long DWORD;
#define ST static
/* XXX: move that to TCC ? */
int verbose = 0;
/* definitions below are from winnt.h */
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 */
BYTE e_code[0x40];
} 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_HEADER32, *PIMAGE_OPTIONAL_HEADER32;
#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
/* ----------------------------------------------------------- */
/* ----------------------------------------------------------- */
IMAGE_DOS_HEADER pe_dos_hdr = {
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 */
{ /* 14 code bytes + "This program cannot be run in DOS mode.\r\r\n$" + 6 * 0x00 */
/*0040 */ 0x0e, 0x1f, 0xba, 0x0e, 0x00, 0xb4, 0x09, 0xcd, 0x21, 0xb8,
0x01, 0x4c, 0xcd, 0x21, 0x54, 0x68,
/*0050 */ 0x69, 0x73, 0x20, 0x70, 0x72, 0x6f, 0x67, 0x72, 0x61, 0x6d,
0x20, 0x63, 0x61, 0x6e, 0x6e, 0x6f,
/*0060 */ 0x74, 0x20, 0x62, 0x65, 0x20, 0x72, 0x75, 0x6e, 0x20, 0x69,
0x6e, 0x20, 0x44, 0x4f, 0x53, 0x20,
/*0070 */ 0x6d, 0x6f, 0x64, 0x65, 0x2e, 0x0d, 0x0d, 0x0a, 0x24, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/*0080 */
}
};
DWORD pe_magic = IMAGE_NT_SIGNATURE;
IMAGE_FILE_HEADER pe_file_hdr = {
0x014C, /*WORD Machine; */
0x0003, /*WORD NumberOfSections; */
0x00000000, /*DWORD TimeDateStamp; */
0x00000000, /*DWORD PointerToSymbolTable; */
0x00000000, /*DWORD NumberOfSymbols; */
0x00E0, /*WORD SizeOfOptionalHeader; */
0x030F /*WORD Characteristics; */
};
IMAGE_OPTIONAL_HEADER32 pe_opt_hdr = {
/* 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}}
};
/*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*/
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;
};
/* ------------------------------------------------------------- */
/* internal temporary structures */
ST const char *pe_sec_names[] = {
".text",
".data",
".bss",
".rsrc",
".reloc",
".stab",
".stabstr"
};
enum {
sec_text = 0,
sec_data,
sec_bss,
sec_rsrc,
sec_reloc,
sec_stab,
sec_stabstr,
pe_sec_number
};
ST DWORD pe_flags[] = {
0x60000020, /* ".text", */
0xC0000040, /* ".data", */
0xC0000080, /* ".bss", */
0x40000040, /* ".rsrc", */
0x42000040, /* ".reloc", */
0x42000802, /* ".stab", */
0x42000802 /* ".stabstr", */
};
struct section_info {
struct section_info *next;
int id;
DWORD sh_addr;
DWORD sh_size;
unsigned char *data;
DWORD data_size;
};
struct import_symbol {
int sym_index;
int offset;
};
struct pe_import_info {
int dll_index;
int sym_count;
struct import_symbol **symbols;
};
struct pe_info {
const char *filename;
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 sh_info[pe_sec_number];
int sec_count;
struct pe_import_info **imp_info;
int imp_count;
Section *reloc;
Section *thunk;
TCCState *s1;
};
/* ------------------------------------------------------------- */
#define PE_MERGE_DATA
// #define PE_PRINT_SECTIONS
#ifndef MAX_PATH
#define MAX_PATH 260
#endif
void error_noabort(const char *, ...);
ST char pe_type;
#define PE_NUL 0
#define PE_DLL 1
#define PE_GUI 2
#define PE_EXE 3
ST int pe_find_import(TCCState * s1, const char *symbol, char *ret)
{
int sym_index = find_elf_sym(s1->dynsymtab_section, symbol);
if (0 == sym_index) {
/* Hm, maybe it's '_symbol' instead of 'symbol' or '__imp__symbol' */
char buffer[100];
if (0 == memcmp(symbol, "__imp__", 7))
symbol += 6;
else
buffer[0] = '_', strcpy(buffer + 1, symbol), symbol = buffer;
sym_index = find_elf_sym(s1->dynsymtab_section, symbol);
}
if (ret)
strcpy(ret, symbol);
return sym_index;
}
#ifdef WIN32
ST void **pe_imp;
ST int nb_pe_imp;
void *resolve_sym(struct TCCState *s1, const char *symbol, int type)
{
char buffer[100], *p = buffer;
void *a = NULL;
int sym_index = pe_find_import(s1, symbol, p);
int dll_index;
const char *dll_name;
void *hm;
if (sym_index) {
dll_index = ((Elf32_Sym *) s1->dynsymtab_section->data)[sym_index].
st_other;
dll_name = s1->loaded_dlls[dll_index]->name;
hm = GetModuleHandleA(dll_name);
if (NULL == hm)
hm = LoadLibraryA(dll_name);
if (hm) {
a = GetProcAddress(hm, buffer);
if (a && STT_OBJECT == type) {
// need to return a pointer to the address for data objects
dynarray_add(&pe_imp, &nb_pe_imp, a);
a = &pe_imp[nb_pe_imp - 1];
}
}
}
return a;
}
#endif
#define for_sym_in_symtab(sym) \
for (sym = (Elf32_Sym *)symtab_section->data + 1; \
sym < (Elf32_Sym *)(symtab_section->data + \
symtab_section->data_offset); \
++sym)
#define pe_set_datadir(dir,addr,size) \
pe_opt_hdr.DataDirectory[dir].VirtualAddress = addr, \
pe_opt_hdr.DataDirectory[dir].Size = size
/*----------------------------------------------------------------------------*/
ST void dynarray_reset(void ***pp, int *n)
{
int i;
for (i = 0; i < *n; ++i)
tcc_free((*pp)[i]);
tcc_free(*pp);
*pp = NULL;
*n = 0;
}
ST 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 DWORD umin(DWORD a, DWORD b)
{
return a < b ? a : b;
}
#endif
ST DWORD umax(DWORD a, DWORD b)
{
return a < b ? b : a;
}
ST void pe_fpad(FILE * fp, DWORD new_pos)
{
DWORD pos = ftell(fp);
while (++pos <= new_pos)
fputc(0, fp);
}
ST DWORD pe_file_align(DWORD n)
{
return (n + (0x200 - 1)) & ~(0x200 - 1);
}
ST DWORD pe_virtual_align(DWORD n)
{
return (n + (0x1000 - 1)) & ~(0x1000 - 1);
}
ST void pe_align_section(Section * s, int a)
{
int i = s->data_offset & (a - 1);
if (i)
section_ptr_add(s, a - i);
}
/*----------------------------------------------------------------------------*/
ST int pe_write_pe(struct pe_info *pe)
{
int i;
FILE *op;
DWORD file_offset;
IMAGE_SECTION_HEADER ish[pe_sec_number], *psh;
int sec_index = 0;
op = fopen(pe->filename, "wb");
if (NULL == op) {
error_noabort("could not create file: %s", pe->filename);
return 1;
}
memset(&ish, 0, sizeof ish);
pe->sizeofheaders = pe_file_align(sizeof pe_dos_hdr
+ sizeof pe_magic
+ sizeof pe_file_hdr
+ sizeof pe_opt_hdr
+
pe->sec_count *
sizeof(IMAGE_SECTION_HEADER)
);
file_offset = pe->sizeofheaders;
pe_fpad(op, file_offset);
if (2 == verbose)
printf("-------------------------------"
"\n virt file size section" "\n");
for (i = 0; i < pe->sec_count; ++i) {
struct section_info *si = pe->sh_info + i;
const char *sh_name = pe_sec_names[si->id];
unsigned long addr = si->sh_addr - pe->imagebase;
unsigned long size = si->sh_size;
if (2 == verbose)
printf("%6lx %6lx %6lx %s\n",
addr, file_offset, size, sh_name);
switch (si->id) {
case sec_text:
pe_opt_hdr.BaseOfCode = addr;
pe_opt_hdr.AddressOfEntryPoint = addr + pe->start_addr;
break;
case sec_data:
pe_opt_hdr.BaseOfData = addr;
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);
}
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;
case sec_stabstr:
break;
}
psh = &ish[sec_index++];
strcpy((char *) psh->Name, sh_name);
psh->Characteristics = pe_flags[si->id];
psh->VirtualAddress = addr;
psh->Misc.VirtualSize = size;
pe_opt_hdr.SizeOfImage =
umax(psh->VirtualAddress + psh->Misc.VirtualSize,
pe_opt_hdr.SizeOfImage);
if (si->data_size) {
psh->PointerToRawData = file_offset;
fwrite(si->data, 1, si->data_size, op);
file_offset = pe_file_align(file_offset + si->data_size);
psh->SizeOfRawData = file_offset - psh->PointerToRawData;
pe_fpad(op, file_offset);
}
}
/*----------------------------------------------------- */
pe_file_hdr.NumberOfSections = sec_index;
pe_opt_hdr.SizeOfHeaders = pe->sizeofheaders;
pe_opt_hdr.ImageBase = pe->imagebase;
if (PE_DLL == pe_type)
pe_file_hdr.Characteristics = 0x230E;
else if (PE_GUI != pe_type)
pe_opt_hdr.Subsystem = 3;
fseek(op, SEEK_SET, 0);
fwrite(&pe_dos_hdr, 1, sizeof pe_dos_hdr, op);
fwrite(&pe_magic, 1, sizeof pe_magic, op);
fwrite(&pe_file_hdr, 1, sizeof pe_file_hdr, op);
fwrite(&pe_opt_hdr, 1, sizeof pe_opt_hdr, op);
for (i = 0; i < sec_index; ++i)
fwrite(&ish[i], 1, sizeof(IMAGE_SECTION_HEADER), op);
fclose(op);
if (2 == verbose)
printf("-------------------------------\n");
if (verbose)
printf("<-- %s (%lu bytes)\n", pe->filename, file_offset);
return 0;
}
/*----------------------------------------------------------------------------*/
ST int pe_add_import(struct pe_info *pe, int sym_index, DWORD offset)
{
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_other;
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)
goto found_sym;
s = tcc_mallocz(sizeof *s);
s->sym_index = sym_index;
s->offset = offset;
dynarray_add((void ***) &p->symbols, &p->sym_count, s);
found_sym:
return 1;
}
/*----------------------------------------------------------------------------*/
ST void pe_build_imports(struct pe_info *pe)
{
int thk_ptr, ent_ptr, dll_ptr, sym_cnt, i;
DWORD voffset = 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]->name;
/* put the dll name into the import header */
if (0 == strncmp(name, "lib", 3))
name += 3;
v = put_elf_str(pe->thunk, name);
hdr = (struct pe_import_header *) (pe->thunk->data + dll_ptr);
hdr->first_thunk = thk_ptr + voffset;
hdr->first_entry = ent_ptr + voffset;
hdr->lib_name_offset = v + voffset;
for (k = 0, n = p->sym_count; k <= n; ++k) {
if (k < n) {
DWORD offset = p->symbols[k]->offset;
int sym_index = p->symbols[k]->sym_index;
Elf32_Sym *sym =
(Elf32_Sym *) pe->s1->dynsymtab_section->data +
sym_index;
const char *name =
pe->s1->dynsymtab_section->link->data + sym->st_name;
if (offset & 0x80000000) { /* ref to data */
Elf32_Sym *sym =
&((Elf32_Sym *) symtab_section->
data)[offset & 0x7FFFFFFF];
sym->st_value = thk_ptr;
sym->st_shndx = pe->thunk->sh_num;
} else { /* ref to function */
char buffer[100];
sprintf(buffer, "IAT.%s", name);
sym_index =
put_elf_sym(symtab_section, thk_ptr, sizeof(DWORD),
ELF32_ST_INFO(STB_GLOBAL, STT_OBJECT),
0, pe->thunk->sh_num, buffer);
put_elf_reloc(symtab_section, text_section, offset, R_386_32, /*R_JMP_SLOT, */
sym_index);
}
v = pe->thunk->data_offset + voffset;
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((void ***) &p->symbols, &p->sym_count);
}
dynarray_reset((void ***) &pe->imp_info, &pe->imp_count);
}
/* ------------------------------------------------------------- */
ST int sym_cmp(const void *va, const void *vb)
{
Elf32_Sym *sa = (Elf32_Sym *)symtab_section->data + *(int*)va;
Elf32_Sym *sb = (Elf32_Sym *)symtab_section->data + *(int*)vb;
const char *ca = symtab_section->link->data + sa->st_name;
const char *cb = symtab_section->link->data + sb->st_name;
return strcmp(ca, cb);
}
ST void pe_build_exports(struct pe_info *pe)
{
Elf32_Sym *sym;
DWORD func_offset, voffset;
struct pe_export_header *hdr;
int sym_count, n, ord, *sorted;
voffset = pe->thunk->sh_addr - pe->imagebase;
sym_count = 0, n = 1, sorted = NULL;
// for simplicity only functions are exported
for_sym_in_symtab(sym)
{
if ((sym->st_other & 1)
&& sym->st_shndx == text_section->sh_num)
dynarray_add((void***)&sorted, &sym_count, (void*)n);
++n;
}
if (0 == sym_count)
return;
qsort (sorted, sym_count, sizeof sorted[0], sym_cmp);
pe_align_section(pe->thunk, 16);
pe->exp_offs = pe->thunk->data_offset;
hdr = section_ptr_add(pe->thunk,
sizeof(struct pe_export_header) +
sym_count * (2 * sizeof(DWORD) + sizeof(WORD)));
func_offset = pe->exp_offs + sizeof(struct pe_export_header);
hdr->Characteristics = 0;
hdr->Base = 1;
hdr->NumberOfFunctions = sym_count;
hdr->NumberOfNames = sym_count;
hdr->AddressOfFunctions = func_offset + voffset;
hdr->AddressOfNames = hdr->AddressOfFunctions + sym_count * sizeof(DWORD);
hdr->AddressOfNameOrdinals = hdr->AddressOfNames + sym_count * sizeof(DWORD);
hdr->Name = pe->thunk->data_offset + voffset;
put_elf_str(pe->thunk, tcc_basename(pe->filename));
for (ord = 0; ord < sym_count; ++ord)
{
char *name; DWORD *p, *pfunc, *pname; WORD *pord;
sym = (Elf32_Sym *)symtab_section->data + sorted[ord];
name = symtab_section->link->data + sym->st_name;
p = (DWORD*)(pe->thunk->data + func_offset);
pfunc = p + ord;
pname = p + sym_count + ord;
pord = (WORD *)(p + 2*sym_count) + ord;
*pfunc = sym->st_value + pe->s1->sections[sym->st_shndx]->sh_addr - pe->imagebase;
*pname = pe->thunk->data_offset + voffset;
*pord = ord;
put_elf_str(pe->thunk, name);
/* printf("export: %s\n", name); */
}
pe->exp_size = pe->thunk->data_offset - pe->exp_offs;
tcc_free(sorted);
}
/* ------------------------------------------------------------- */
ST void pe_build_reloc(struct pe_info *pe, int *section_order,
int section_count)
{
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 < section_count) {
sr = (s = pe->s1->sections[section_order[i++]])->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)
section_ptr_add(pe->reloc, 2), ++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 int pe_assign_addresses(struct pe_info *pe)
{
int i, k, n;
DWORD addr;
int section_order[pe_sec_number];
struct section_info *si_data = NULL;
pe->imagebase = PE_DLL == pe_type ? 0x10000000 : 0x00400000;
addr = pe->imagebase + 1;
if (PE_DLL == pe_type)
pe->reloc = new_section(pe->s1, ".reloc", SHT_DYNAMIC, SHF_ALLOC);
for (n = k = 0; n < pe_sec_number; ++n) {
for (i = 1; i < pe->s1->nb_sections; ++i) {
Section *s = pe->s1->sections[i];
if (0 == strcmp(s->name, pe_sec_names[n])) {
struct section_info *si = &pe->sh_info[pe->sec_count];
#ifdef PE_MERGE_DATA
if (n == sec_bss && si_data) {
/* append .bss to .data */
s->sh_addr = addr = ((addr - 1) | 15) + 1;
addr += s->data_offset;
si_data->sh_size = addr - si_data->sh_addr;
} else
#endif
{
si->sh_addr = s->sh_addr = addr =
pe_virtual_align(addr);
si->id = n;
if (n == sec_data) {
pe->thunk = s;
si_data = si;
pe_build_imports(pe);
pe_build_exports(pe);
} else if (n == sec_reloc) {
pe_build_reloc(pe, section_order, k);
}
if (s->data_offset) {
if (n != sec_bss) {
si->data = s->data;
si->data_size = s->data_offset;
}
addr += s->data_offset;
si->sh_size = s->data_offset;
++pe->sec_count;
}
//printf("Section %08X %04X %s\n", si->sh_addr, si->data_size, s->name);
}
section_order[k] = i, ++k;
}
}
}
return 0;
}
/*----------------------------------------------------------------------------*/
ST int pe_check_symbols(struct pe_info *pe)
{
Elf32_Sym *sym;
int ret = 0;
pe_align_section(text_section, 8);
for_sym_in_symtab(sym) {
if (sym->st_shndx == SHN_UNDEF) {
const char *symbol = symtab_section->link->data + sym->st_name;
unsigned type = ELF32_ST_TYPE(sym->st_info);
int sym_index = pe_find_import(pe->s1, symbol, NULL);
if (sym_index) {
if (type == STT_FUNC) {
unsigned long offset = text_section->data_offset;
if (pe_add_import(pe, sym_index, offset + 2)) {
/* add the 'jmp IAT[x]' instruction */
*(WORD *) section_ptr_add(text_section, 8) =
0x25FF;
/* patch the symbol */
sym->st_shndx = text_section->sh_num;
sym->st_value = offset;
continue;
}
} else if (type == STT_OBJECT) { /* data, ptr to that should be */
if (pe_add_import(pe, sym_index,
(sym -
(Elf32_Sym *) symtab_section->data) |
0x80000000))
continue;
}
}
error_noabort("undefined symbol '%s'", symbol);
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 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 (s->sh_type == SHT_SYMTAB)
m = sizeof(Elf32_Sym);
if (s->sh_type == SHT_REL)
m = sizeof(Elf32_Rel);
else
m = 16;
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,
" name:%04X"
" value:%04X"
" size:%04X"
" bind:%02X"
" type:%02X"
" other:%02X"
" shndx:%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,
" offset:%04X"
" type:%02X"
" symbol:%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");
}
#endif
static int pe_test_cmd(const char **pp, const char *cmd)
{
const char *p;
char *q, buf[16];
int ret;
p = *pp;
q = buf;
while (*p != '\0' && !is_space(*p)) {
if ((q - buf) < sizeof(buf) - 1)
*q++ = toup(*p);
p++;
}
*q = '\0';
ret = !strcmp(buf, cmd);
*pp = p;
return ret;
}
/* ------------------------------------------------------------- */
int pe_load_def_file(TCCState * s1, FILE * fp)
{
DLLReference *dllref;
int f = 0, sym_index;
char *p, line[120], dllname[40];
while (fgets(line, sizeof line, fp)) {
p = strchr(line, 0);
while (p > line && p[-1] <= ' ')
--p;
*p = 0;
p = line;
while (*p && *p <= ' ')
++p;
if (*p && ';' != *p)
switch (f) {
case 0:
if (!pe_test_cmd((const char **)&p, "LIBRARY"))
return -1;
while (is_space(*p))
p++;
pstrcpy(dllname, sizeof(dllname), p);
++f;
continue;
case 1:
if (!pe_test_cmd((const char **)&p, "EXPORTS"))
return -1;
++f;
continue;
case 2:
dllref =
tcc_malloc(sizeof(DLLReference) + strlen(dllname));
strcpy(dllref->name, dllname);
dllref->level = 0;
dynarray_add((void ***) &s1->loaded_dlls,
&s1->nb_loaded_dlls, dllref);
++f;
default:
/* tccpe needs to know from what dll it should import
the sym */
sym_index = add_elf_sym(s1->dynsymtab_section,
0, 0, ELF32_ST_INFO(STB_GLOBAL,
STT_FUNC),
s1->nb_loaded_dlls - 1,
text_section->sh_num, p);
continue;
}
}
return 0;
}
/* ------------------------------------------------------------- */
void pe_guess_outfile(char *objfilename, int output_type)
{
char *ext = strrchr(objfilename, '.');
if (NULL == ext)
ext = strchr(objfilename, 0);
if (output_type == TCC_OUTPUT_DLL)
strcpy(ext, ".dll");
else
if (output_type == TCC_OUTPUT_EXE)
strcpy(ext, ".exe");
else
if (output_type == TCC_OUTPUT_OBJ && strcmp(ext, ".o"))
strcpy(ext, ".o");
else
error("no outputfile given");
}
/* ------------------------------------------------------------- */
unsigned long pe_add_runtime(TCCState * s1)
{
const char *start_symbol;
unsigned long addr;
if (find_elf_sym(symtab_section, "WinMain"))
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 ? "_dllstart"
: 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");
tcc_add_library(s1, "msvcrt");
if (PE_DLL == pe_type || PE_GUI == pe_type) {
tcc_add_library(s1, "kernel32");
tcc_add_library(s1, "user32");
tcc_add_library(s1, "gdi32");
}
}
addr = start_symbol ?
(unsigned long) tcc_get_symbol_err(s1, start_symbol) : 0;
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");
/* FreeConsole(); */
}
return addr;
}
int tcc_output_pe(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.start_addr = pe_add_runtime(s1);
relocate_common_syms(); /* assign bss adresses */
ret = pe_check_symbols(&pe);
if (0 == ret) {
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);
}
ret = pe_write_pe(&pe);
}
#ifdef PE_PRINT_SECTIONS
{
Section *s;
FILE *f;
f = fopen("tccpe.log", "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
return ret;
}
/*----------------------------------------------------------------------------*/
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