My fork of the Tiny C Compiler, designed to support self-modifying and hot-reloading applications
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/*
* 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
*/
#include "tcc.h"
#define PE_MERGE_DATA 1
#define PE_PRINT_SECTIONS 0
#ifndef _WIN32
#define stricmp strcasecmp
#define strnicmp strncasecmp
#include <sys/stat.h> /* chmod() */
#endif
#ifdef TCC_TARGET_X86_64
# define ADDR3264 ULONGLONG
# define PE_IMAGE_REL IMAGE_REL_BASED_DIR64
# define REL_TYPE_DIRECT R_X86_64_64
# define R_XXX_THUNKFIX R_X86_64_PC32
# define R_XXX_RELATIVE R_X86_64_RELATIVE
# define R_XXX_FUNCCALL R_X86_64_PC32
# define IMAGE_FILE_MACHINE 0x8664
# define RSRC_RELTYPE 3
#elif defined TCC_TARGET_ARM
# define ADDR3264 DWORD
# define PE_IMAGE_REL IMAGE_REL_BASED_HIGHLOW
# define REL_TYPE_DIRECT R_ARM_ABS32
# define R_XXX_THUNKFIX R_ARM_ABS32
# define R_XXX_RELATIVE R_ARM_RELATIVE
# define R_XXX_FUNCCALL R_ARM_PC24
# define R_XXX_FUNCCALL2 R_ARM_ABS32
# define IMAGE_FILE_MACHINE 0x01C0
# define RSRC_RELTYPE 7 /* ??? (not tested) */
#elif defined TCC_TARGET_I386
# define ADDR3264 DWORD
# define PE_IMAGE_REL IMAGE_REL_BASED_HIGHLOW
# define REL_TYPE_DIRECT R_386_32
# define R_XXX_THUNKFIX R_386_32
# define R_XXX_RELATIVE R_386_RELATIVE
# define R_XXX_FUNCCALL R_386_PC32
# define IMAGE_FILE_MACHINE 0x014C
# define RSRC_RELTYPE 7 /* DIR32NB */
#endif
#ifndef IMAGE_NT_SIGNATURE
/* ----------------------------------------------------------- */
/* definitions below are from winnt.h */
typedef unsigned char BYTE;
typedef unsigned short WORD;
typedef unsigned int DWORD;
typedef unsigned long long ULONGLONG;
#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;
#ifndef TCC_TARGET_X86_64
DWORD BaseOfData;
#endif
/* NT additional fields. */
ADDR3264 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;
ADDR3264 SizeOfStackReserve;
ADDR3264 SizeOfStackCommit;
ADDR3264 SizeOfHeapReserve;
ADDR3264 SizeOfHeapCommit;
DWORD LoaderFlags;
DWORD NumberOfRvaAndSizes;
IMAGE_DATA_DIRECTORY DataDirectory[16];
} IMAGE_OPTIONAL_HEADER32, IMAGE_OPTIONAL_HEADER64, IMAGE_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_EXPORT_DIRECTORY {
DWORD Characteristics;
DWORD TimeDateStamp;
WORD MajorVersion;
WORD MinorVersion;
DWORD Name;
DWORD Base;
DWORD NumberOfFunctions;
DWORD NumberOfNames;
DWORD AddressOfFunctions;
DWORD AddressOfNames;
DWORD AddressOfNameOrdinals;
} IMAGE_EXPORT_DIRECTORY,*PIMAGE_EXPORT_DIRECTORY;
typedef struct _IMAGE_IMPORT_DESCRIPTOR {
union {
DWORD Characteristics;
DWORD OriginalFirstThunk;
};
DWORD TimeDateStamp;
DWORD ForwarderChain;
DWORD Name;
DWORD FirstThunk;
} IMAGE_IMPORT_DESCRIPTOR;
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
#define IMAGE_REL_BASED_DIR64 10
#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
#pragma pack(pop)
/* ----------------------------------------------------------- */
#endif /* ndef IMAGE_NT_SIGNATURE */
/* ----------------------------------------------------------- */
#ifndef IMAGE_REL_BASED_DIR64
# define IMAGE_REL_BASED_DIR64 10
#endif
#pragma pack(push, 1)
struct pe_header
{
IMAGE_DOS_HEADER doshdr;
BYTE dosstub[0x40];
DWORD nt_sig;
IMAGE_FILE_HEADER filehdr;
#ifdef TCC_TARGET_X86_64
IMAGE_OPTIONAL_HEADER64 opthdr;
#else
#ifdef _WIN64
IMAGE_OPTIONAL_HEADER32 opthdr;
#else
IMAGE_OPTIONAL_HEADER opthdr;
#endif
#endif
};
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)
/* ------------------------------------------------------------- */
/* internal temporary structures */
enum {
sec_text = 0,
sec_rdata ,
sec_data ,
sec_bss ,
sec_idata ,
sec_pdata ,
sec_other ,
sec_rsrc ,
sec_stab ,
sec_stabstr ,
sec_reloc ,
sec_last
};
#if 0
static const DWORD pe_sec_flags[] = {
0x60000020, /* ".text" , */
0xC0000040, /* ".data" , */
0xC0000080, /* ".bss" , */
0x40000040, /* ".idata" , */
0x40000040, /* ".pdata" , */
0xE0000060, /* < other > , */
0x40000040, /* ".rsrc" , */
0x42000802, /* ".stab" , */
0x42000040, /* ".reloc" , */
};
#endif
struct section_info {
int cls;
char name[32];
DWORD sh_addr;
DWORD sh_size;
DWORD pe_flags;
Section *sec;
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;
ADDR3264 imagebase;
const char *start_symbol;
DWORD start_addr;
DWORD imp_offs;
DWORD imp_size;
DWORD iat_offs;
DWORD iat_size;
DWORD exp_offs;
DWORD exp_size;
int subsystem;
DWORD section_align;
DWORD file_align;
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
#define PE_RUN 4
/* --------------------------------------------*/
static const char *pe_export_name(TCCState *s1, ElfW(Sym) *sym)
{
const char *name = (char*)symtab_section->link->data + sym->st_name;
if (s1->leading_underscore && name[0] == '_' && !(sym->st_other & ST_PE_STDCALL))
return name + 1;
return name;
}
static int pe_find_import(TCCState * s1, ElfW(Sym) *sym)
{
char buffer[200];
const char *s, *p;
int sym_index = 0, n = 0;
int a, err = 0;
do {
s = pe_export_name(s1, sym);
a = 0;
if (n) {
/* second try: */
if (sym->st_other & ST_PE_STDCALL) {
/* try w/0 stdcall deco (windows API convention) */
p = strrchr(s, '@');
if (!p || s[0] != '_')
break;
strcpy(buffer, s+1)[p-s-1] = 0;
} else if (s[0] != '_') { /* try non-ansi function */
buffer[0] = '_', strcpy(buffer + 1, s);
} else if (0 == memcmp(s, "__imp_", 6)) { /* mingw 2.0 */
strcpy(buffer, s + 6), a = 1;
} else if (0 == memcmp(s, "_imp__", 6)) { /* mingw 3.7 */
strcpy(buffer, s + 6), a = 1;
} else {
continue;
}
s = buffer;
}
sym_index = find_elf_sym(s1->dynsymtab_section, s);
// printf("find (%d) %d %s\n", n, sym_index, s);
if (sym_index
&& ELFW(ST_TYPE)(sym->st_info) == STT_OBJECT
&& 0 == (sym->st_other & ST_PE_IMPORT)
&& 0 == a
) err = -1, sym_index = 0;
} while (0 == sym_index && ++n < 2);
return n == 2 ? err : sym_index;
}
/*----------------------------------------------------------------------------*/
static 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;
}
static DWORD umin(DWORD a, DWORD b)
{
return a < b ? a : b;
}
static DWORD umax(DWORD a, DWORD b)
{
return a < b ? b : a;
}
static DWORD pe_file_align(struct pe_info *pe, DWORD n)
{
return (n + (pe->file_align - 1)) & ~(pe->file_align - 1);
}
static DWORD pe_virtual_align(struct pe_info *pe, DWORD n)
{
return (n + (pe->section_align - 1)) & ~(pe->section_align - 1);
}
static void pe_align_section(Section *s, int a)
{
int i = s->data_offset & (a-1);
if (i)
section_ptr_add(s, a - i);
}
static void pe_set_datadir(struct pe_header *hdr, int dir, DWORD addr, DWORD size)
{
hdr->opthdr.DataDirectory[dir].VirtualAddress = addr;
hdr->opthdr.DataDirectory[dir].Size = size;
}
struct pe_file {
FILE *op;
DWORD sum;
unsigned pos;
};
static int pe_fwrite(void *data, int len, struct pe_file *pf)
{
WORD *p = data;
DWORD sum;
int ret, i;
pf->pos += (ret = fwrite(data, 1, len, pf->op));
sum = pf->sum;
for (i = len; i > 0; i -= 2) {
sum += (i >= 2) ? *p++ : *(BYTE*)p;
sum = (sum + (sum >> 16)) & 0xFFFF;
}
pf->sum = sum;
return len == ret ? 0 : -1;
}
static void pe_fpad(struct pe_file *pf, DWORD new_pos)
{
char buf[256];
int n, diff = new_pos - pf->pos;
memset(buf, 0, sizeof buf);
while (diff > 0) {
diff -= n = umin(diff, sizeof buf);
fwrite(buf, n, 1, pf->op);
}
pf->pos = new_pos;
}
/*----------------------------------------------------------------------------*/
static int pe_write(struct pe_info *pe)
{
static const struct pe_header pe_template = {
{
/* 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 */
IMAGE_FILE_MACHINE, /*WORD Machine; */
0x0003, /*WORD NumberOfSections; */
0x00000000, /*DWORD TimeDateStamp; */
0x00000000, /*DWORD PointerToSymbolTable; */
0x00000000, /*DWORD NumberOfSymbols; */
#if defined(TCC_TARGET_X86_64)
0x00F0, /*WORD SizeOfOptionalHeader; */
0x022F /*WORD Characteristics; */
#define CHARACTERISTICS_DLL 0x222E
#elif defined(TCC_TARGET_I386)
0x00E0, /*WORD SizeOfOptionalHeader; */
0x030F /*WORD Characteristics; */
#define CHARACTERISTICS_DLL 0x230E
#elif defined(TCC_TARGET_ARM)
0x00E0, /*WORD SizeOfOptionalHeader; */
0x010F, /*WORD Characteristics; */
#define CHARACTERISTICS_DLL 0x230F
#endif
},{
/* IMAGE_OPTIONAL_HEADER opthdr */
/* Standard fields. */
#ifdef TCC_TARGET_X86_64
0x020B, /*WORD Magic; */
#else
0x010B, /*WORD Magic; */
#endif
0x06, /*BYTE MajorLinkerVersion; */
0x00, /*BYTE MinorLinkerVersion; */
0x00000000, /*DWORD SizeOfCode; */
0x00000000, /*DWORD SizeOfInitializedData; */
0x00000000, /*DWORD SizeOfUninitializedData; */
0x00000000, /*DWORD AddressOfEntryPoint; */
0x00000000, /*DWORD BaseOfCode; */
#ifndef TCC_TARGET_X86_64
0x00000000, /*DWORD BaseOfData; */
#endif
/* NT additional fields. */
#if defined(TCC_TARGET_ARM)
0x00100000, /*DWORD ImageBase; */
#else
0x00400000, /*DWORD ImageBase; */
#endif
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_header pe_header = pe_template;
int i;
struct pe_file pf = {0};
DWORD file_offset;
struct section_info *si;
IMAGE_SECTION_HEADER *psh;
TCCState *s1 = pe->s1;
pf.op = fopen(pe->filename, "wb");
if (NULL == pf.op) {
tcc_error_noabort("could not write '%s': %s", pe->filename, strerror(errno));
return -1;
}
pe->sizeofheaders = pe_file_align(pe,
sizeof (struct pe_header)
+ pe->sec_count * sizeof (IMAGE_SECTION_HEADER)
);
file_offset = pe->sizeofheaders;
if (2 == pe->s1->verbose)
printf("-------------------------------"
"\n virt file size section" "\n");
for (i = 0; i < pe->sec_count; ++i) {
DWORD addr, size;
const char *sh_name;
si = pe->sec_info[i];
sh_name = si->name;
addr = si->sh_addr - pe->imagebase;
size = si->sh_size;
psh = &si->ish;
if (2 == pe->s1->verbose)
printf("%6x %6x %6x %s\n",
(unsigned)addr, (unsigned)file_offset, (unsigned)size, sh_name);
switch (si->cls) {
case sec_text:
if (!pe_header.opthdr.BaseOfCode)
pe_header.opthdr.BaseOfCode = addr;
break;
case sec_data:
#ifndef TCC_TARGET_X86_64
if (!pe_header.opthdr.BaseOfData)
pe_header.opthdr.BaseOfData = addr;
#endif
break;
case sec_bss:
break;
case sec_reloc:
pe_set_datadir(&pe_header, IMAGE_DIRECTORY_ENTRY_BASERELOC, addr, size);
break;
case sec_rsrc:
pe_set_datadir(&pe_header, IMAGE_DIRECTORY_ENTRY_RESOURCE, addr, size);
break;
case sec_pdata:
pe_set_datadir(&pe_header, IMAGE_DIRECTORY_ENTRY_EXCEPTION, addr, size);
break;
}
if (pe->imp_size) {
pe_set_datadir(&pe_header, IMAGE_DIRECTORY_ENTRY_IMPORT,
pe->imp_offs, pe->imp_size);
pe_set_datadir(&pe_header, IMAGE_DIRECTORY_ENTRY_IAT,
pe->iat_offs, pe->iat_size);
}
if (pe->exp_size) {
pe_set_datadir(&pe_header, IMAGE_DIRECTORY_ENTRY_EXPORT,
pe->exp_offs, pe->exp_size);
}
memcpy(psh->Name, sh_name, umin(strlen(sh_name), sizeof psh->Name));
psh->Characteristics = si->pe_flags;
psh->VirtualAddress = addr;
psh->Misc.VirtualSize = size;
pe_header.opthdr.SizeOfImage =
umax(pe_virtual_align(pe, size + addr), pe_header.opthdr.SizeOfImage);
if (si->data_size) {
psh->PointerToRawData = file_offset;
file_offset = pe_file_align(pe, file_offset + si->data_size);
psh->SizeOfRawData = file_offset - psh->PointerToRawData;
if (si->cls == sec_text)
pe_header.opthdr.SizeOfCode += psh->SizeOfRawData;
else
pe_header.opthdr.SizeOfInitializedData += psh->SizeOfRawData;
}
}
//pe_header.filehdr.TimeDateStamp = time(NULL);
pe_header.filehdr.NumberOfSections = pe->sec_count;
pe_header.opthdr.AddressOfEntryPoint = pe->start_addr;
pe_header.opthdr.SizeOfHeaders = pe->sizeofheaders;
pe_header.opthdr.ImageBase = pe->imagebase;
pe_header.opthdr.Subsystem = pe->subsystem;
if (pe->s1->pe_stack_size)
pe_header.opthdr.SizeOfStackReserve = pe->s1->pe_stack_size;
if (PE_DLL == pe->type)
pe_header.filehdr.Characteristics = CHARACTERISTICS_DLL;
pe_header.filehdr.Characteristics |= pe->s1->pe_characteristics;
pe_fwrite(&pe_header, sizeof pe_header, &pf);
for (i = 0; i < pe->sec_count; ++i)
pe_fwrite(&pe->sec_info[i]->ish, sizeof(IMAGE_SECTION_HEADER), &pf);
file_offset = pe->sizeofheaders;
for (i = 0; i < pe->sec_count; ++i) {
Section *s;
si = pe->sec_info[i];
if (!si->data_size)
continue;
for (s = si->sec; s; s = s->prev) {
pe_fpad(&pf, file_offset);
pe_fwrite(s->data, s->data_offset, &pf);
if (s->prev)
file_offset += s->prev->sh_addr - s->sh_addr;
}
file_offset = si->ish.PointerToRawData + si->ish.SizeOfRawData;
pe_fpad(&pf, file_offset);
}
pf.sum += file_offset;
fseek(pf.op, offsetof(struct pe_header, opthdr.CheckSum), SEEK_SET);
pe_fwrite(&pf.sum, sizeof (DWORD), &pf);
fclose (pf.op);
#ifndef _WIN32
chmod(pe->filename, 0777);
#endif
if (2 == pe->s1->verbose)
printf("-------------------------------\n");
if (pe->s1->verbose)
printf("<- %s (%u bytes)\n", pe->filename, (unsigned)file_offset);
return 0;
}
/*----------------------------------------------------------------------------*/
static 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;
ElfW(Sym) *isym;
isym = (ElfW(Sym) *)pe->s1->dynsymtab_section->data + sym_index;
dll_index = isym->st_size;
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(&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(&p->symbols, &p->sym_count, s);
s->sym_index = sym_index;
return s;
}
void pe_free_imports(struct pe_info *pe)
{
int i;
for (i = 0; i < pe->imp_count; ++i) {
struct pe_import_info *p = pe->imp_info[i];
dynarray_reset(&p->symbols, &p->sym_count);
}
dynarray_reset(&pe->imp_info, &pe->imp_count);
}
/*----------------------------------------------------------------------------*/
static 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;
TCCState *s1 = pe->s1;
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_size = (ndlls + 1) * sizeof(IMAGE_IMPORT_DESCRIPTOR);
pe->iat_size = (sym_cnt + ndlls) * sizeof(ADDR3264);
dll_ptr = pe->thunk->data_offset;
thk_ptr = dll_ptr + pe->imp_size;
ent_ptr = thk_ptr + pe->iat_size;
pe->imp_offs = dll_ptr + rva_base;
pe->iat_offs = thk_ptr + rva_base;
section_ptr_add(pe->thunk, pe->imp_size + 2*pe->iat_size);
for (i = 0; i < pe->imp_count; ++i) {
IMAGE_IMPORT_DESCRIPTOR *hdr;
int k, n, dllindex;
ADDR3264 v;
struct pe_import_info *p = pe->imp_info[i];
const char *name;
DLLReference *dllref;
dllindex = p->dll_index;
if (dllindex)
name = tcc_basename((dllref = pe->s1->loaded_dlls[dllindex-1])->name);
else
name = "", dllref = NULL;
/* put the dll name into the import header */
v = put_elf_str(pe->thunk, name);
hdr = (IMAGE_IMPORT_DESCRIPTOR*)(pe->thunk->data + dll_ptr);
hdr->FirstThunk = thk_ptr + rva_base;
hdr->OriginalFirstThunk = ent_ptr + rva_base;
hdr->Name = v + rva_base;
for (k = 0, n = p->sym_count; k <= n; ++k) {
if (k < n) {
int iat_index = p->symbols[k]->iat_index;
int sym_index = p->symbols[k]->sym_index;
ElfW(Sym) *imp_sym = (ElfW(Sym) *)pe->s1->dynsymtab_section->data + sym_index;
ElfW(Sym) *org_sym = (ElfW(Sym) *)symtab_section->data + iat_index;
const char *name = (char*)pe->s1->dynsymtab_section->link->data + imp_sym->st_name;
int ordinal;
org_sym->st_value = thk_ptr;
org_sym->st_shndx = pe->thunk->sh_num;
if (dllref)
v = 0, ordinal = imp_sym->st_value; /* ordinal from pe_load_def */
else
ordinal = 0, v = imp_sym->st_value; /* address from tcc_add_symbol() */
#ifdef TCC_IS_NATIVE
if (pe->type == PE_RUN) {
if (dllref) {
if ( !dllref->handle )
dllref->handle = LoadLibrary(dllref->name);
v = (ADDR3264)GetProcAddress(dllref->handle, ordinal?(char*)0+ordinal:name);
}
if (!v)
tcc_error_noabort("could not resolve symbol '%s'", name);
} else
#endif
if (ordinal) {
v = ordinal | (ADDR3264)1 << (sizeof(ADDR3264)*8 - 1);
} else {
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 */
}
*(ADDR3264*)(pe->thunk->data+thk_ptr) =
*(ADDR3264*)(pe->thunk->data+ent_ptr) = v;
thk_ptr += sizeof (ADDR3264);
ent_ptr += sizeof (ADDR3264);
}
dll_ptr += sizeof(IMAGE_IMPORT_DESCRIPTOR);
}
}
/* ------------------------------------------------------------- */
struct pe_sort_sym
{
int index;
const char *name;
};
static int sym_cmp(const void *va, const void *vb)
{
const char *ca = (*(struct pe_sort_sym**)va)->name;
const char *cb = (*(struct pe_sort_sym**)vb)->name;
return strcmp(ca, cb);
}
static void pe_build_exports(struct pe_info *pe)
{
ElfW(Sym) *sym;
int sym_index, sym_end;
DWORD rva_base, base_o, func_o, name_o, ord_o, str_o;
IMAGE_EXPORT_DIRECTORY *hdr;
int sym_count, ord;
struct pe_sort_sym **sorted, *p;
TCCState *s1 = pe->s1;
FILE *op;
char buf[260];
const char *dllname;
const char *name;
rva_base = pe->thunk->sh_addr - pe->imagebase;
sym_count = 0, sorted = NULL, op = NULL;
sym_end = symtab_section->data_offset / sizeof(ElfW(Sym));
for (sym_index = 1; sym_index < sym_end; ++sym_index) {
sym = (ElfW(Sym)*)symtab_section->data + sym_index;
name = pe_export_name(pe->s1, sym);
if (sym->st_other & ST_PE_EXPORT) {
p = tcc_malloc(sizeof *p);
p->index = sym_index;
p->name = name;
dynarray_add(&sorted, &sym_count, p);
}
#if 0
if (sym->st_other & ST_PE_EXPORT)
printf("export: %s\n", name);
if (sym->st_other & ST_PE_STDCALL)
printf("stdcall: %s\n", name);
#endif
}
if (0 == sym_count)
return;
qsort (sorted, sym_count, sizeof *sorted, sym_cmp);
pe_align_section(pe->thunk, 16);
dllname = tcc_basename(pe->filename);
base_o = pe->thunk->data_offset;
func_o = base_o + sizeof(IMAGE_EXPORT_DIRECTORY);
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 - base_o);
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 <output-filename>.def */
pstrcpy(buf, sizeof buf, pe->filename);
strcpy(tcc_fileextension(buf), ".def");
op = fopen(buf, "wb");
if (NULL == op) {
tcc_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 symbol%s)\n", buf, sym_count, &"s"[sym_count < 2]);
}
#endif
for (ord = 0; ord < sym_count; ++ord)
{
p = sorted[ord], sym_index = p->index, name = p->name;
/* insert actual address later in relocate_sections() */
put_elf_reloc(symtab_section, pe->thunk,
func_o, R_XXX_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_offs = base_o + rva_base;
pe->exp_size = pe->thunk->data_offset - base_o;
dynarray_reset(&sorted, &sym_count);
if (op)
fclose(op);
}
/* ------------------------------------------------------------- */
static void pe_build_reloc (struct pe_info *pe)
{
DWORD offset, block_ptr, sh_addr, addr;
int count, i;
ElfW_Rel *rel, *rel_end;
Section *s = NULL, *sr;
struct pe_reloc_header *hdr;
sh_addr = offset = block_ptr = count = i = 0;
rel = rel_end = NULL;
for(;;) {
if (rel < rel_end) {
int type = ELFW(R_TYPE)(rel->r_info);
addr = rel->r_offset + sh_addr;
++ rel;
if (type != REL_TYPE_DIRECT)
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 | PE_IMAGE_REL<<12;
++count;
continue;
}
-- rel;
} else if (s) {
sr = s->reloc;
if (sr) {
rel = (ElfW_Rel *)sr->data;
rel_end = (ElfW_Rel *)(sr->data + sr->data_offset);
sh_addr = s->sh_addr;
}
s = s->prev;
continue;
} else if (i < pe->sec_count) {
s = pe->sec_info[i]->sec, ++i;
continue;
} else if (!count)
break;
/* fill the last block and ready for a new one */
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;
}
}
/* ------------------------------------------------------------- */
static int pe_section_class(Section *s)
{
int type, flags;
const char *name;
type = s->sh_type;
flags = s->sh_flags;
name = s->name;
if (0 == memcmp(name, ".stab", 5)) {
if (0 == s->s1->do_debug)
return sec_last;
return name[5] ? sec_stabstr : sec_stab;
}
if (flags & SHF_ALLOC) {
if (type == SHT_PROGBITS
|| type == SHT_INIT_ARRAY
|| type == SHT_FINI_ARRAY) {
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;
if (0 == strcmp(name, ".pdata"))
return sec_pdata;
return sec_rdata;
} else if (type == SHT_NOBITS) {
return sec_bss;
}
return sec_other;
} else {
if (0 == strcmp(name, ".reloc"))
return sec_reloc;
}
return sec_last;
}
static int pe_assign_addresses (struct pe_info *pe)
{
int i, k, n, c, nbs;
DWORD addr;
int *sec_order, *sec_cls;
struct section_info *si;
Section *s;
TCCState *s1 = pe->s1;
if (PE_DLL == pe->type)
pe->reloc = new_section(pe->s1, ".reloc", SHT_PROGBITS, 0);
//pe->thunk = new_section(pe->s1, ".iedat", SHT_PROGBITS, SHF_ALLOC);
nbs = s1->nb_sections;
sec_order = tcc_mallocz(2 * sizeof (int) * nbs);
sec_cls = sec_order + nbs;
for (i = 1; i < nbs; ++i) {
s = s1->sections[i];
k = pe_section_class(s);
for (n = i; n > 1 && k < (c = sec_cls[n - 1]); --n)
sec_cls[n] = c, sec_order[n] = sec_order[n - 1];
sec_cls[n] = k, sec_order[n] = i;
}
si = NULL;
addr = pe->imagebase + 1;
for (i = 1; (c = sec_cls[i]) < sec_last; ++i) {
s = s1->sections[sec_order[i]];
if (PE_MERGE_DATA && c == sec_bss)
c = sec_data;
if (si && c == si->cls) {
/* merge with previous section */
s->sh_addr = addr = ((addr - 1) | (16 - 1)) + 1;
} else {
si = NULL;
s->sh_addr = addr = pe_virtual_align(pe, addr);
}
if (NULL == pe->thunk
&& c == (data_section == rodata_section ? sec_data : sec_rdata))
pe->thunk = s;
if (s == pe->thunk) {
pe_build_imports(pe);
pe_build_exports(pe);
}
if (s == pe->reloc)
pe_build_reloc (pe);
if (0 == s->data_offset)
continue;
if (si)
goto add_section;
si = tcc_mallocz(sizeof *si);
dynarray_add(&pe->sec_info, &pe->sec_count, si);
strcpy(si->name, s->name);
si->cls = c;
si->sh_addr = addr;
si->pe_flags = IMAGE_SCN_MEM_READ;
if (s->sh_flags & SHF_EXECINSTR)
si->pe_flags |= IMAGE_SCN_MEM_EXECUTE | IMAGE_SCN_CNT_CODE;
else if (s->sh_type == SHT_NOBITS)
si->pe_flags |= IMAGE_SCN_CNT_UNINITIALIZED_DATA;
else
si->pe_flags |= IMAGE_SCN_CNT_INITIALIZED_DATA;
if (s->sh_flags & SHF_WRITE)
si->pe_flags |= IMAGE_SCN_MEM_WRITE;
if (0 == (s->sh_flags & SHF_ALLOC))
si->pe_flags |= IMAGE_SCN_MEM_DISCARDABLE;
add_section:
addr += s->data_offset;
si->sh_size = addr - si->sh_addr;
if (s->sh_type != SHT_NOBITS) {
Section **ps = &si->sec;
while (*ps)
ps = &(*ps)->prev;
*ps = s, s->prev = NULL;
si->data_size = si->sh_size;
}
//printf("%08x %05x %08x %s\n", si->sh_addr, si->sh_size, si->pe_flags, s->name);
}
#if 0
for (i = 1; i < nbs; ++i) {
Section *s = s1->sections[sec_order[i]];
int type = s->sh_type;
int flags = s->sh_flags;
printf("section %-16s %-10s %08x %04x %s,%s,%s\n",
s->name,
type == SHT_PROGBITS ? "progbits" :
type == SHT_INIT_ARRAY ? "initarr" :
type == SHT_FINI_ARRAY ? "finiarr" :
type == SHT_NOBITS ? "nobits" :
type == SHT_SYMTAB ? "symtab" :
type == SHT_STRTAB ? "strtab" :
type == SHT_RELX ? "rel" : "???",
(unsigned)s->sh_addr,
(unsigned)s->data_offset,
flags & SHF_ALLOC ? "alloc" : "",
flags & SHF_WRITE ? "write" : "",
flags & SHF_EXECINSTR ? "exec" : ""
);
fflush(stdout);
}
s1->verbose = 2;
#endif
tcc_free(sec_order);
return 0;
}
/*----------------------------------------------------------------------------*/
static int pe_isafunc(TCCState *s1, int sym_index)
{
Section *sr = text_section->reloc;
ElfW_Rel *rel, *rel_end;
ElfW(Addr)info = ELFW(R_INFO)(sym_index, R_XXX_FUNCCALL);
#ifdef R_XXX_FUNCCALL2
ElfW(Addr)info2 = ELFW(R_INFO)(sym_index, R_XXX_FUNCCALL2);
#endif
if (!sr)
return 0;
rel_end = (ElfW_Rel *)(sr->data + sr->data_offset);
for (rel = (ElfW_Rel *)sr->data; rel < rel_end; rel++) {
if (rel->r_info == info)
return 1;
#ifdef R_XXX_FUNCCALL2
if (rel->r_info == info2)
return 1;
#endif
}
return 0;
}
/*----------------------------------------------------------------------------*/
static int pe_check_symbols(struct pe_info *pe)
{
ElfW(Sym) *sym;
int sym_index, sym_end;
int ret = 0;
TCCState *s1 = pe->s1;
pe_align_section(text_section, 8);
sym_end = symtab_section->data_offset / sizeof(ElfW(Sym));
for (sym_index = 1; sym_index < sym_end; ++sym_index) {
sym = (ElfW(Sym) *)symtab_section->data + sym_index;
if (sym->st_shndx == SHN_UNDEF) {
const char *name = (char*)symtab_section->link->data + sym->st_name;
unsigned type = ELFW(ST_TYPE)(sym->st_info);
int imp_sym = pe_find_import(pe->s1, sym);
struct import_symbol *is;
if (imp_sym <= 0)
goto not_found;
if (type == STT_NOTYPE) {
/* symbols from assembler have no type, find out which */
if (pe_isafunc(s1, sym_index))
type = STT_FUNC;
else
type = STT_OBJECT;
}
is = pe_add_import(pe, imp_sym);
if (type == STT_FUNC) {
unsigned long offset = is->thk_offset;
if (offset) {
/* got aliased symbol, like stricmp and _stricmp */
} else {
char buffer[100];
unsigned char *p;
/* 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),
ELFW(ST_INFO)(STB_GLOBAL, STT_OBJECT),
0, SHN_UNDEF, buffer);
offset = text_section->data_offset;
is->thk_offset = offset;
/* add the 'jmp IAT[x]' instruction */
#ifdef TCC_TARGET_ARM
p = section_ptr_add(text_section, 8+4); // room for code and address
write32le(p + 0, 0xE59FC000); // arm code ldr ip, [pc] ; PC+8+0 = 0001xxxx
write32le(p + 4, 0xE59CF000); // arm code ldr pc, [ip]
put_elf_reloc(symtab_section, text_section,
offset + 8, R_XXX_THUNKFIX, is->iat_index); // offset to IAT position
#else
p = section_ptr_add(text_section, 8);
write16le(p, 0x25FF);
#ifdef TCC_TARGET_X86_64
write32le(p + 2, (DWORD)-4);
#endif
put_elf_reloc(symtab_section, text_section,
offset + 2, R_XXX_THUNKFIX, is->iat_index);
#endif
}
/* tcc_realloc might have altered sym's address */
sym = (ElfW(Sym) *)symtab_section->data + sym_index;
/* patch the original symbol */
sym->st_value = offset;
sym->st_shndx = text_section->sh_num;
sym->st_other &= ~ST_PE_EXPORT; /* 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:
if (ELFW(ST_BIND)(sym->st_info) == STB_WEAK)
/* STB_WEAK undefined symbols are accepted */
continue;
tcc_error_noabort("undefined symbol '%s'%s", name,
imp_sym < 0 ? ", missing __declspec(dllimport)?":"");
ret = -1;
} else if (pe->s1->rdynamic
&& ELFW(ST_BIND)(sym->st_info) != STB_LOCAL) {
/* if -rdynamic option, then export all non local symbols */
sym->st_other |= ST_PE_EXPORT;
}
}
return ret;
}
/*----------------------------------------------------------------------------*/
#if PE_PRINT_SECTIONS
static void pe_print_section(FILE * f, Section * s)
{
/* just if you're 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", (unsigned)s->sh_addr);
fprintf(f, "\ncontents %08X", (unsigned)l);
fprintf(f, "\n\n");
if (s->sh_type == SHT_NOBITS)
return;
if (0 == l)
return;
if (s->sh_type == SHT_SYMTAB)
m = sizeof(ElfW(Sym));
else if (s->sh_type == SHT_RELX)
m = sizeof(ElfW_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_RELX) {
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) {
ElfW(Sym) *sym = (ElfW(Sym) *) (p + i);
const char *name = s->link->data + sym->st_name;
fprintf(f, " %04X %04X %04X %02X %02X %02X %04X \"%s\"",
(unsigned)sym->st_name,
(unsigned)sym->st_value,
(unsigned)sym->st_size,
(unsigned)ELFW(ST_BIND)(sym->st_info),
(unsigned)ELFW(ST_TYPE)(sym->st_info),
(unsigned)sym->st_other,
(unsigned)sym->st_shndx,
name);
} else if (s->sh_type == SHT_RELX) {
ElfW_Rel *rel = (ElfW_Rel *) (p + i);
ElfW(Sym) *sym =
(ElfW(Sym) *) s->link->data + ELFW(R_SYM)(rel->r_info);
const char *name = s->link->link->data + sym->st_name;
fprintf(f, " %04X %02X %04X \"%s\"",
(unsigned)rel->r_offset,
(unsigned)ELFW(R_TYPE)(rel->r_info),
(unsigned)ELFW(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");
}
static void pe_print_sections(TCCState *s1, const char *fname)
{
Section *s;
FILE *f;
int i;
f = fopen(fname, "w");
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
/* ------------------------------------------------------------- */
/* helper function for load/store to insert one more indirection */
#if defined TCC_TARGET_I386 || defined TCC_TARGET_X86_64
ST_FUNC SValue *pe_getimport(SValue *sv, SValue *v2)
{
int r2;
if ((sv->r & (VT_VALMASK|VT_SYM)) != (VT_CONST|VT_SYM) || (sv->r2 != VT_CONST))
return sv;
if (!sv->sym->a.dllimport)
return sv;
// printf("import %04x %04x %04x %s\n", sv->type.t, sv->sym->type.t, sv->r, get_tok_str(sv->sym->v, NULL));
memset(v2, 0, sizeof *v2);
v2->type.t = VT_PTR;
v2->r = VT_CONST | VT_SYM | VT_LVAL;
v2->sym = sv->sym;
r2 = get_reg(RC_INT);
load(r2, v2);
v2->r = r2;
if ((uint32_t)sv->c.i) {
vpushv(v2);
vpushi(sv->c.i);
gen_opi('+');
*v2 = *vtop--;
}
v2->type.t = sv->type.t;
v2->r |= sv->r & VT_LVAL;
return v2;
}
#endif
ST_FUNC int pe_putimport(TCCState *s1, int dllindex, const char *name, addr_t value)
{
return set_elf_sym(
s1->dynsymtab_section,
value,
dllindex, /* st_size */
ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE),
0,
value ? SHN_ABS : SHN_UNDEF,
name
);
}
static int read_mem(int fd, unsigned offset, void *buffer, unsigned len)
{
lseek(fd, offset, SEEK_SET);
return len == read(fd, buffer, len);
}
/* ------------------------------------------------------------- */
static int get_dllexports(int fd, char **pp)
{
int l, i, n, n0, ret;
char *p;
IMAGE_SECTION_HEADER ish;
IMAGE_EXPORT_DIRECTORY ied;
IMAGE_DOS_HEADER dh;
IMAGE_FILE_HEADER ih;
DWORD sig, ref, addr, ptr, namep;
int pef_hdroffset, opt_hdroffset, sec_hdroffset;
n = n0 = 0;
p = NULL;
ret = 1;
if (!read_mem(fd, 0, &dh, sizeof dh))
goto the_end;
if (!read_mem(fd, dh.e_lfanew, &sig, sizeof sig))
goto the_end;
if (sig != 0x00004550)
goto the_end;
pef_hdroffset = dh.e_lfanew + sizeof sig;
if (!read_mem(fd, pef_hdroffset, &ih, sizeof ih))
goto the_end;
opt_hdroffset = pef_hdroffset + sizeof ih;
if (ih.Machine == 0x014C) {
IMAGE_OPTIONAL_HEADER32 oh;
sec_hdroffset = opt_hdroffset + sizeof oh;
if (!read_mem(fd, opt_hdroffset, &oh, sizeof oh))
goto the_end;
if (IMAGE_DIRECTORY_ENTRY_EXPORT >= oh.NumberOfRvaAndSizes)
goto the_end_0;
addr = oh.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress;
} else if (ih.Machine == 0x8664) {
IMAGE_OPTIONAL_HEADER64 oh;
sec_hdroffset = opt_hdroffset + sizeof oh;
if (!read_mem(fd, opt_hdroffset, &oh, sizeof oh))
goto the_end;
if (IMAGE_DIRECTORY_ENTRY_EXPORT >= oh.NumberOfRvaAndSizes)
goto the_end_0;
addr = oh.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress;
} else
goto the_end;
//printf("addr: %08x\n", addr);
for (i = 0; i < ih.NumberOfSections; ++i) {
if (!read_mem(fd, sec_hdroffset + i * sizeof ish, &ish, sizeof ish))
goto the_end;
//printf("vaddr: %08x\n", ish.VirtualAddress);
if (addr >= ish.VirtualAddress && addr < ish.VirtualAddress + ish.SizeOfRawData)
goto found;
}
goto the_end_0;
found:
ref = ish.VirtualAddress - ish.PointerToRawData;
if (!read_mem(fd, addr - ref, &ied, sizeof ied))
goto the_end;
namep = ied.AddressOfNames - ref;
for (i = 0; i < ied.NumberOfNames; ++i) {
if (!read_mem(fd, namep, &ptr, sizeof ptr))
goto the_end;
namep += sizeof ptr;
for (l = 0;;) {
if (n+1 >= n0)
p = tcc_realloc(p, n0 = n0 ? n0 * 2 : 256);
if (!read_mem(fd, ptr - ref + l++, p + n, 1)) {
tcc_free(p), p = NULL;
goto the_end;
}
if (p[n++] == 0)
break;
}
}
if (p)
p[n] = 0;
the_end_0:
ret = 0;
the_end:
*pp = p;
return ret;
}
/* -------------------------------------------------------------
* This is for compiled windows resources in 'coff' format
* as generated by 'windres.exe -O coff ...'.
*/
static int pe_load_res(TCCState *s1, int fd)
{
struct pe_rsrc_header hdr;
Section *rsrc_section;
int i, ret = -1, sym_index;
BYTE *ptr;
unsigned offs;
if (!read_mem(fd, 0, &hdr, sizeof hdr))
goto quit;
if (hdr.filehdr.Machine != IMAGE_FILE_MACHINE
|| hdr.filehdr.NumberOfSections != 1
|| strcmp((char*)hdr.sectionhdr.Name, ".rsrc") != 0)
goto quit;
rsrc_section = new_section(s1, ".rsrc", SHT_PROGBITS, SHF_ALLOC);
ptr = section_ptr_add(rsrc_section, hdr.sectionhdr.SizeOfRawData);
offs = hdr.sectionhdr.PointerToRawData;
if (!read_mem(fd, offs, ptr, hdr.sectionhdr.SizeOfRawData))
goto quit;
offs = hdr.sectionhdr.PointerToRelocations;
sym_index = put_elf_sym(symtab_section, 0, 0, 0, 0, rsrc_section->sh_num, ".rsrc");
for (i = 0; i < hdr.sectionhdr.NumberOfRelocations; ++i) {
struct pe_rsrc_reloc rel;
if (!read_mem(fd, offs, &rel, sizeof rel))
goto quit;
// printf("rsrc_reloc: %x %x %x\n", rel.offset, rel.size, rel.type);
if (rel.type != RSRC_RELTYPE)
goto quit;
put_elf_reloc(symtab_section, rsrc_section,
rel.offset, R_XXX_RELATIVE, sym_index);
offs += sizeof rel;
}
ret = 0;
quit:
return ret;
}
/* ------------------------------------------------------------- */
static char *trimfront(char *p)
{
while ((unsigned char)*p <= ' ' && *p && *p != '\n')
++p;
return p;
}
/*
static char *trimback(char *a, char *e)
{
while (e > a && (unsigned char)e[-1] <= ' ')
--e;
*e = 0;;
return a;
}*/
static char *get_token(char **s, char *f)
{
char *p = *s, *e;
p = e = trimfront(p);
while ((unsigned char)*e > ' ')
++e;
*s = trimfront(e);
*f = **s; *e = 0;
return p;
}
static int pe_load_def(TCCState *s1, int fd)
{
int state = 0, ret = -1, dllindex = 0, ord;
char dllname[80], *buf, *line, *p, *x, next;
buf = tcc_load_text(fd);
for (line = buf;; ++line) {
p = get_token(&line, &next);
if (!(*p && *p != ';'))
goto skip;
switch (state) {
case 0:
if (0 != stricmp(p, "LIBRARY") || next == '\n')
goto quit;
pstrcpy(dllname, sizeof dllname, get_token(&line, &next));
++state;
break;
case 1:
if (0 != stricmp(p, "EXPORTS"))
goto quit;
++state;
break;
case 2:
dllindex = tcc_add_dllref(s1, dllname, 0)->index;
++state;
/* fall through */
default:
/* get ordinal and will store in sym->st_value */
ord = 0;
if (next == '@') {
x = get_token(&line, &next);
ord = (int)strtol(x + 1, &x, 10);
}
//printf("token %s ; %s : %d\n", dllname, p, ord);
pe_putimport(s1, dllindex, p, ord);
break;
}
skip:
while ((unsigned char)next > ' ')
get_token(&line, &next);
if (next != '\n')
break;
}
ret = 0;
quit:
tcc_free(buf);
return ret;
}
/* ------------------------------------------------------------- */
static int pe_load_dll(TCCState *s1, int fd, const char *filename)
{
char *p, *q;
int index, ret;
ret = get_dllexports(fd, &p);
if (ret) {
return -1;
} else if (p) {
index = tcc_add_dllref(s1, filename, 0)->index;
for (q = p; *q; q += 1 + strlen(q))
pe_putimport(s1, index, q, 0);
tcc_free(p);
}
return 0;
}
ST_FUNC int pe_load_file(struct TCCState *s1, int fd, const char *filename)
{
int ret = -1;
char buf[10];
if (0 == strcmp(tcc_fileextension(filename), ".def"))
ret = pe_load_def(s1, fd);
else if (pe_load_res(s1, fd) == 0)
ret = 0;
else if (read_mem(fd, 0, buf, 4) && 0 == memcmp(buf, "MZ", 2))
ret = pe_load_dll(s1, fd, filename);
return ret;
}
PUB_FUNC int tcc_get_dllexports(const char *filename, char **pp)
{
int ret, fd = open(filename, O_RDONLY | O_BINARY);
if (fd < 0)
return -1;
ret = get_dllexports(fd, pp);
close(fd);
return ret;
}
/* ------------------------------------------------------------- */
#ifdef TCC_TARGET_X86_64
static unsigned pe_add_uwwind_info(TCCState *s1)
{
if (NULL == s1->uw_pdata) {
s1->uw_pdata = find_section(s1, ".pdata");
s1->uw_pdata->sh_addralign = 4;
}
if (0 == s1->uw_sym)
s1->uw_sym = put_elf_sym(symtab_section, 0, 0, 0, 0, text_section->sh_num, ".uw_base");
if (0 == s1->uw_offs) {
/* As our functions all have the same stackframe, we use one entry for all */
static const unsigned char uw_info[] = {
0x01, // UBYTE: 3 Version , UBYTE: 5 Flags
0x04, // UBYTE Size of prolog
0x02, // UBYTE Count of unwind codes
0x05, // UBYTE: 4 Frame Register (rbp), UBYTE: 4 Frame Register offset (scaled)
// USHORT * n Unwind codes array
// 0x0b, 0x01, 0xff, 0xff, // stack size
0x04, 0x03, // set frame ptr (mov rsp -> rbp)
0x01, 0x50 // push reg (rbp)
};
Section *s = text_section;
unsigned char *p;
section_ptr_add(s, -s->data_offset & 3); /* align */
s1->uw_offs = s->data_offset;
p = section_ptr_add(s, sizeof uw_info);
memcpy(p, uw_info, sizeof uw_info);
}
return s1->uw_offs;
}
ST_FUNC void pe_add_unwind_data(unsigned start, unsigned end, unsigned stack)
{
TCCState *s1 = tcc_state;
Section *pd;
unsigned o, n, d;
struct /* _RUNTIME_FUNCTION */ {
DWORD BeginAddress;
DWORD EndAddress;
DWORD UnwindData;
} *p;
d = pe_add_uwwind_info(s1);
pd = s1->uw_pdata;
o = pd->data_offset;
p = section_ptr_add(pd, sizeof *p);
/* record this function */
p->BeginAddress = start;
p->EndAddress = end;
p->UnwindData = d;
/* put relocations on it */
for (n = o + sizeof *p; o < n; o += sizeof p->BeginAddress)
put_elf_reloc(symtab_section, pd, o, R_XXX_RELATIVE, s1->uw_sym);
}
#endif
/* ------------------------------------------------------------- */
#ifdef TCC_TARGET_X86_64
#define PE_STDSYM(n,s) n
#else
#define PE_STDSYM(n,s) "_" n s
#endif
static void pe_add_runtime(TCCState *s1, struct pe_info *pe)
{
const char *start_symbol;
int pe_type;
if (TCC_OUTPUT_DLL == s1->output_type) {
pe_type = PE_DLL;
start_symbol = PE_STDSYM("__dllstart","@12");
} else {
const char *run_symbol;
if (find_elf_sym(symtab_section, PE_STDSYM("WinMain","@16"))) {
start_symbol = "__winstart";
run_symbol = "__runwinmain";
pe_type = PE_GUI;
} else if (find_elf_sym(symtab_section, PE_STDSYM("wWinMain","@16"))) {
start_symbol = "__wwinstart";
run_symbol = "__runwwinmain";
pe_type = PE_GUI;
} else if (find_elf_sym(symtab_section, "wmain")) {
start_symbol = "__wstart";
run_symbol = "__runwmain";
pe_type = PE_EXE;
} else {
start_symbol = "__start";
run_symbol = "__runmain";
pe_type = PE_EXE;
}
if (TCC_OUTPUT_MEMORY == s1->output_type)
start_symbol = run_symbol;
}
pe->start_symbol = start_symbol + 1;
if (!s1->leading_underscore || strchr(start_symbol, '@'))
++start_symbol;
#ifdef CONFIG_TCC_BACKTRACE
if (s1->do_backtrace) {
#ifdef CONFIG_TCC_BCHECK
if (s1->do_bounds_check && s1->output_type != TCC_OUTPUT_DLL)
tcc_add_support(s1, "bcheck.o");
#endif
if (s1->output_type == TCC_OUTPUT_EXE)
tcc_add_support(s1, "bt-exe.o");
if (s1->output_type == TCC_OUTPUT_DLL)
tcc_add_support(s1, "bt-dll.o");
if (s1->output_type != TCC_OUTPUT_DLL)
tcc_add_support(s1, "bt-log.o");
if (s1->output_type != TCC_OUTPUT_MEMORY)
tcc_add_btstub(s1);
}
#endif
/* grab the startup code from libtcc1.a */
#ifdef TCC_IS_NATIVE
if (TCC_OUTPUT_MEMORY != s1->output_type || s1->runtime_main)
#endif
set_global_sym(s1, start_symbol, NULL, 0);
if (0 == s1->nostdlib) {
static const char * const libs[] = {
"msvcrt", "kernel32", "", "user32", "gdi32", NULL
};
const char * const *pp, *p;
if (TCC_LIBTCC1[0])
tcc_add_support(s1, TCC_LIBTCC1);
for (pp = libs; 0 != (p = *pp); ++pp) {
if (*p)
tcc_add_library_err(s1, p);
else if (PE_DLL != pe_type && PE_GUI != pe_type)
break;
}
}
/* need this for 'tccelf.c:relocate_sections()' */
if (TCC_OUTPUT_DLL == s1->output_type)
s1->output_type = TCC_OUTPUT_EXE;
if (TCC_OUTPUT_MEMORY == s1->output_type)
pe_type = PE_RUN;
pe->type = pe_type;
}
static void pe_set_options(TCCState * s1, struct pe_info *pe)
{
if (PE_DLL == pe->type) {
/* XXX: check if is correct for arm-pe target */
pe->imagebase = 0x10000000;
} else {
#if defined(TCC_TARGET_ARM)
pe->imagebase = 0x00010000;
#else
pe->imagebase = 0x00400000;
#endif
}
#if defined(TCC_TARGET_ARM)
/* we use "console" subsystem by default */
pe->subsystem = 9;
#else
if (PE_DLL == pe->type || PE_GUI == pe->type)
pe->subsystem = 2;
else
pe->subsystem = 3;
#endif
/* Allow override via -Wl,-subsystem=... option */
if (s1->pe_subsystem != 0)
pe->subsystem = s1->pe_subsystem;
/* set default file/section alignment */
if (pe->subsystem == 1) {
pe->section_align = 0x20;
pe->file_align = 0x20;
} else {
pe->section_align = 0x1000;
pe->file_align = 0x200;
}
if (s1->section_align != 0)
pe->section_align = s1->section_align;
if (s1->pe_file_align != 0)
pe->file_align = s1->pe_file_align;
if ((pe->subsystem >= 10) && (pe->subsystem <= 12))
pe->imagebase = 0;
if (s1->has_text_addr)
pe->imagebase = s1->text_addr;
}
ST_FUNC int pe_output_file(TCCState *s1, const char *filename)
{
int ret;
struct pe_info pe;
memset(&pe, 0, sizeof pe);
pe.filename = filename;
pe.s1 = s1;
s1->filetype = 0;
#ifdef CONFIG_TCC_BCHECK
tcc_add_bcheck(s1);
#endif
tcc_add_pragma_libs(s1);
pe_add_runtime(s1, &pe);
resolve_common_syms(s1);
pe_set_options(s1, &pe);
ret = pe_check_symbols(&pe);
if (ret)
;
else if (filename) {
pe_assign_addresses(&pe);
relocate_syms(s1, s1->symtab, 0);
s1->pe_imagebase = pe.imagebase;
relocate_sections(s1);
pe.start_addr = (DWORD)
(get_sym_addr(s1, pe.start_symbol, 1, 1) - pe.imagebase);
if (s1->nb_errors)
ret = -1;
else
ret = pe_write(&pe);
dynarray_reset(&pe.sec_info, &pe.sec_count);
} else {
#ifdef TCC_IS_NATIVE
pe.thunk = data_section;
pe_build_imports(&pe);
s1->runtime_main = pe.start_symbol;
#ifdef TCC_TARGET_X86_64
s1->uw_pdata = find_section(s1, ".pdata");
#endif
#endif
}
pe_free_imports(&pe);
#if PE_PRINT_SECTIONS
if (s1->g_debug & 8)
pe_print_sections(s1, "tcc.log");
#endif
return ret;
}
/* ------------------------------------------------------------- */