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tccpe: build IAT vector with with -run too

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This prepares for x86_64 where we need the vector
for far jumps.  Also, resolve DLL symbols in place
This commit is contained in:
grischka 2009-07-06 21:34:22 +02:00 committed by unknown
parent bed17847bd
commit 370cdeb628
4 changed files with 42 additions and 68 deletions
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13
libtcc.c
View File

@ -212,12 +212,9 @@ static int tcc_add_file_internal(TCCState *s, const char *filename, int flags);
int tcc_output_coff(TCCState *s1, FILE *f);
/* tccpe.c */
void *resolve_sym(TCCState *s1, const char *sym, int type);
int pe_load_def_file(struct TCCState *s1, int fd);
int pe_test_res_file(void *v, int size);
int pe_load_res_file(struct TCCState *s1, int fd);
void pe_add_runtime(struct TCCState *s1);
void pe_guess_outfile(char *objfilename, int output_type);
int pe_output_file(struct TCCState *s1, const char *filename);
/* tccasm.c */
@ -306,7 +303,7 @@ static inline int toup(int c)
return c;
}
void *resolve_sym(TCCState *s1, const char *sym, int type);
void *resolve_sym(TCCState *s1, const char *sym);
/********************************************************/
@ -412,7 +409,7 @@ void *resolve_sym(TCCState *s1, const char *symbol, int type)
#include <dlfcn.h>
void *resolve_sym(TCCState *s1, const char *sym, int type)
void *resolve_sym(TCCState *s1, const char *sym)
{
return dlsym(RTLD_DEFAULT, sym);
}
@ -1666,15 +1663,15 @@ int tcc_relocate(TCCState *s1, void *ptr)
s1->runtime_added = 1;
s1->nb_errors = 0;
#ifdef TCC_TARGET_PE
pe_add_runtime(s1);
relocate_common_syms();
tcc_add_linker_symbols(s1);
pe_output_file(s1, NULL);
#else
tcc_add_runtime(s1);
relocate_common_syms();
tcc_add_linker_symbols(s1);
build_got_entries(s1);
#endif
if (s1->nb_errors)
return -1;
}
offset = 0, mem = (unsigned long)ptr;

1
tcc.h
View File

@ -46,6 +46,7 @@
#include <direct.h> /* getcwd */
#define inline __inline
#define inp next_inp
#define dlclose FreeLibrary
#endif
#ifndef _WIN32

6
tccelf.c
View File

@ -432,7 +432,6 @@ static void relocate_syms(TCCState *s1, int do_resolve)
ElfW(Sym) *sym, *esym, *sym_end;
int sym_bind, sh_num, sym_index;
const char *name;
unsigned long addr;
sym_end = (ElfW(Sym) *)(symtab_section->data + symtab_section->data_offset);
for(sym = (ElfW(Sym) *)symtab_section->data + 1;
@ -442,12 +441,15 @@ static void relocate_syms(TCCState *s1, int do_resolve)
if (sh_num == SHN_UNDEF) {
name = strtab_section->data + sym->st_name;
if (do_resolve) {
#ifndef _WIN32
unsigned long addr;
name = symtab_section->link->data + sym->st_name;
addr = (unsigned long)resolve_sym(s1, name, ELFW(ST_TYPE)(sym->st_info));
addr = (unsigned long)resolve_sym(s1, name);
if (addr) {
sym->st_value = addr;
goto found;
}
#endif
} else if (s1->dynsym) {
/* if dynamic symbol exist, then use it */
sym_index = find_elf_sym(s1->dynsym, name);

90
tccpe.c
View File

@ -36,6 +36,10 @@
#define PE_MERGE_DATA
// #define PE_PRINT_SECTIONS
#if defined _WIN32 && (defined _WIN64) == (defined TCC_TARGET_X86_64)
#define TCC_IS_NATIVE
#endif
/* ----------------------------------------------------------- */
#ifndef IMAGE_NT_SIGNATURE
/* ----------------------------------------------------------- */
@ -411,6 +415,7 @@ struct pe_info {
#define PE_DLL 1
#define PE_GUI 2
#define PE_EXE 3
#define PE_RUN 4
void error_noabort(const char *, ...);
@ -455,54 +460,11 @@ ST_FN int pe_find_import(TCCState * s1, const char *symbol)
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);
// printf("find (%d) %d %s\n", n, sym_index, s);
} while (0 == sym_index && ++n < 2);
return sym_index;
}
#if defined _WIN32 || defined __CYGWIN__
#ifdef __CYGWIN__
# include <dlfcn.h>
# 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)
@ -729,7 +691,8 @@ ST_FN void pe_build_imports(struct pe_info *pe)
for (i = 0; i < pe->imp_count; ++i) {
struct pe_import_header *hdr;
int k, n, v;
int k, n;
DWORD v;
struct pe_import_info *p = pe->imp_info[i];
const char *name = pe->s1->loaded_dlls[p->dll_index-1]->name;
@ -743,7 +706,7 @@ ST_FN void pe_build_imports(struct pe_info *pe)
for (k = 0, n = p->sym_count; k <= n; ++k) {
if (k < n) {
DWORD iat_index = p->symbols[k]->iat_index;
int 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;
@ -754,7 +717,16 @@ ST_FN void pe_build_imports(struct pe_info *pe)
v = pe->thunk->data_offset + rva_base;
section_ptr_add(pe->thunk, sizeof(WORD)); /* hint, not used */
put_elf_str(pe->thunk, name);
#ifdef TCC_IS_NATIVE
if (pe->type == PE_RUN) {
DLLReference *dllref = pe->s1->loaded_dlls[imp_sym->st_value-1];
if ( !dllref->handle )
dllref->handle = LoadLibrary(dllref->name);
v = (DWORD)GetProcAddress(dllref->handle, name);
if (!v)
error_noabort("undefined symbol '%s'", name);
}
#endif
} else {
v = 0; /* last entry is zero */
}
@ -1488,6 +1460,7 @@ ST_FN void pe_add_runtime_ex(TCCState *s1, struct pe_info *pe)
tcc_add_library(s1, "gdi32");
}
}
pe->type = pe_type;
if (start_symbol) {
addr = (unsigned long)tcc_get_symbol_err(s1, start_symbol);
@ -1498,16 +1471,7 @@ ST_FN void pe_add_runtime_ex(TCCState *s1, struct pe_info *pe)
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);
pe->start_addr = addr;
}
PUB_FN int pe_output_file(TCCState * s1, const char *filename)
@ -1525,7 +1489,10 @@ PUB_FN int pe_output_file(TCCState * s1, const char *filename)
tcc_add_linker_symbols(s1);
ret = pe_check_symbols(&pe);
if (0 == ret) {
if (ret)
return ret;
if (filename) {
if (PE_DLL == pe.type) {
pe.reloc = new_section(pe.s1, ".reloc", SHT_PROGBITS, 0);
pe.imagebase = 0x10000000;
@ -1546,6 +1513,13 @@ PUB_FN int pe_output_file(TCCState * s1, const char *filename)
else
ret = pe_write(&pe);
tcc_free(pe.sec_info);
} else {
#ifndef TCC_IS_NATIVE
error_noabort("-run supported only on native platform");
#endif
pe.type = PE_RUN;
pe.thunk = data_section;
pe_build_imports(&pe);
}
#ifdef PE_PRINT_SECTIONS