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tccpe: improve dllimport/export and use for tcc_add_symbol

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This commit is contained in:
grischka 2010-01-14 20:55:51 +01:00
parent bdb9387a74
commit 2341ee5142
7 changed files with 178 additions and 134 deletions
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10
i386-gen.c
View File

@ -215,9 +215,10 @@ ST_FUNC void load(int r, SValue *sv)
SValue v1;
#ifdef TCC_TARGET_PE
if (pe_dllimport(r, sv, load))
return;
SValue v2;
sv = pe_getimport(sv, &v2);
#endif
fr = sv->r;
ft = sv->type.t;
fc = sv->c.ul;
@ -283,9 +284,10 @@ ST_FUNC void store(int r, SValue *v)
int fr, bt, ft, fc;
#ifdef TCC_TARGET_PE
if (pe_dllimport(r, v, store))
return;
SValue v2;
v = pe_getimport(v, &v2);
#endif
ft = v->type.t;
fc = v->c.ul;
fr = v->r & VT_VALMASK;

44
libtcc.c
View File

@ -393,7 +393,7 @@ ST_FUNC void put_extern_sym2(Sym *sym, Section *section,
unsigned long value, unsigned long size,
int can_add_underscore)
{
int sym_type, sym_bind, sh_num, info, other, attr;
int sym_type, sym_bind, sh_num, info, other;
ElfW(Sym) *esym;
const char *name;
char buf1[256];
@ -405,26 +405,12 @@ ST_FUNC void put_extern_sym2(Sym *sym, Section *section,
else
sh_num = section->sh_num;
other = attr = 0;
if ((sym->type.t & VT_BTYPE) == VT_FUNC) {
sym_type = STT_FUNC;
#ifdef TCC_TARGET_PE
if (sym->type.ref)
attr = sym->type.ref->r;
if (FUNC_EXPORT(attr))
other |= 1;
if (FUNC_CALL(attr) == FUNC_STDCALL)
other |= 2;
#endif
} else if ((sym->type.t & VT_BTYPE) == VT_VOID) {
sym_type = STT_NOTYPE;
} else {
sym_type = STT_OBJECT;
#ifdef TCC_TARGET_PE
if (sym->type.t & VT_EXPORT)
other |= 1;
#endif
}
if (sym->type.t & VT_STATIC)
@ -463,12 +449,27 @@ ST_FUNC void put_extern_sym2(Sym *sym, Section *section,
}
}
#endif
other = 0;
#ifdef TCC_TARGET_PE
if ((other & 2) && can_add_underscore) {
sprintf(buf1, "_%s@%d", name, FUNC_ARGS(attr));
name = buf1;
} else
if (sym->type.t & VT_EXPORT)
other |= 1;
if (sym_type == STT_FUNC && sym->type.ref) {
int attr = sym->type.ref->r;
if (FUNC_EXPORT(attr))
other |= 1;
if (FUNC_CALL(attr) == FUNC_STDCALL && can_add_underscore) {
sprintf(buf1, "_%s@%d", name, FUNC_ARGS(attr) * PTR_SIZE);
name = buf1;
other |= 2;
can_add_underscore = 0;
}
} else {
if (find_elf_sym(tcc_state->dynsymtab_section, name))
other |= 4;
if (sym->type.t & VT_IMPORT)
other |= 4;
}
#endif
if (tcc_state->leading_underscore && can_add_underscore) {
buf1[0] = '_';
@ -482,7 +483,6 @@ ST_FUNC void put_extern_sym2(Sym *sym, Section *section,
esym->st_value = value;
esym->st_size = size;
esym->st_shndx = sh_num;
esym->st_other |= other;
}
}
@ -1215,9 +1215,13 @@ LIBTCCAPI int tcc_add_library(TCCState *s, const char *libraryname)
LIBTCCAPI int tcc_add_symbol(TCCState *s, const char *name, void *val)
{
#ifdef TCC_TARGET_PE
pe_putimport(s, 0, name, val);
#else
add_elf_sym(symtab_section, (uplong)val, 0,
ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
SHN_ABS, name);
#endif
return 0;
}

10
tcc.h
View File

@ -261,12 +261,13 @@ typedef struct DLLReference {
/* GNUC attribute definition */
typedef struct AttributeDef {
unsigned
packed : 1,
aligned : 5, /* alignement (0..16) */
func_call : 3, /* calling convention (0..5), see below */
aligned : 5, /* alignement (0..16) */
packed : 1,
func_export : 1,
func_import : 1,
func_args : 8;
func_args : 5,
fill : 16;
struct Section *section;
} AttributeDef;
@ -1176,7 +1177,8 @@ ST_FUNC void asm_clobber(uint8_t *clobber_regs, const char *str);
ST_FUNC int pe_load_file(struct TCCState *s1, const char *filename, int fd);
ST_FUNC int pe_add_dll(struct TCCState *s, const char *libraryname);
ST_FUNC int pe_output_file(TCCState * s1, const char *filename);
ST_FUNC int pe_dllimport(int r, SValue *sv, void (*fn)(int r, SValue *sv));
ST_FUNC int pe_putimport(TCCState *s1, int dllindex, const char *name, const void *value);
ST_FUNC SValue *pe_getimport(SValue *sv, SValue *v2);
/* tiny_impdef.c */
ST_FUNC char *get_export_names(FILE *fp);
#ifdef TCC_TARGET_X86_64

26
tccgen.c
View File

@ -1343,10 +1343,8 @@ static void gen_opic(int op)
}
goto general_case;
} else if (c2 && (op == '+' || op == '-') &&
(((vtop[-1].r & (VT_VALMASK | VT_LVAL | VT_SYM)) == (VT_CONST | VT_SYM)
&& !(vtop[-1].sym->type.t & VT_IMPORT))
||
(vtop[-1].r & (VT_VALMASK | VT_LVAL)) == VT_LOCAL)) {
(((vtop[-1].r & (VT_VALMASK | VT_LVAL | VT_SYM)) == (VT_CONST | VT_SYM))
|| (vtop[-1].r & (VT_VALMASK | VT_LVAL)) == VT_LOCAL)) {
/* symbol + constant case */
if (op == '-')
l2 = -l2;
@ -2973,7 +2971,7 @@ static void post_type(CType *type, AttributeDef *ad)
type_decl(&pt, &ad1, &n, TYPE_DIRECT | TYPE_ABSTRACT);
if ((pt.t & VT_BTYPE) == VT_VOID)
error("parameter declared as void");
arg_size += (type_size(&pt, &align) + 3) & ~3;
arg_size += (type_size(&pt, &align) + PTR_SIZE - 1) / PTR_SIZE;
} else {
old_proto:
n = tok;
@ -5284,6 +5282,12 @@ ST_FUNC void decl(int l)
func_decl_list(sym);
}
#ifdef TCC_TARGET_PE
if (ad.func_import)
type.t |= VT_IMPORT;
if (ad.func_export)
type.t |= VT_EXPORT;
#endif
if (tok == '{') {
if (l == VT_LOCAL)
error("cannot use local functions");
@ -5402,10 +5406,6 @@ ST_FUNC void decl(int l)
/* NOTE: as GCC, uninitialized global static
arrays of null size are considered as
extern */
#ifdef TCC_TARGET_PE
if (ad.func_import)
type.t |= VT_IMPORT;
#endif
external_sym(v, &type, r);
} else {
type.t |= (btype.t & VT_STATIC); /* Retain "static". */
@ -5415,12 +5415,7 @@ ST_FUNC void decl(int l)
r |= l;
if (has_init)
next();
#ifdef TCC_TARGET_PE
if (ad.func_export)
type.t |= VT_EXPORT;
#endif
decl_initializer_alloc(&type, &ad, r,
has_init, v, l);
decl_initializer_alloc(&type, &ad, r, has_init, v, l);
}
}
if (tok != ',') {
@ -5432,4 +5427,3 @@ ST_FUNC void decl(int l)
}
}
}

172
tccpe.c
View File

@ -753,10 +753,10 @@ static struct import_symbol *pe_add_import(struct pe_info *pe, int sym_index)
int dll_index;
struct pe_import_info *p;
struct import_symbol *s;
ElfW(Sym) *isym;
dll_index = ((ElfW(Sym) *)pe->s1->dynsymtab_section->data + sym_index)->st_value;
if (0 == dll_index)
return NULL;
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) {
@ -804,14 +804,20 @@ static void pe_build_imports(struct pe_info *pe)
for (i = 0; i < pe->imp_count; ++i) {
IMAGE_IMPORT_DESCRIPTOR *hdr;
int k, n;
int k, n, dllindex;
ADDR3264 v;
struct pe_import_info *p = pe->imp_info[i];
const char *name = pe->s1->loaded_dlls[p->dll_index-1]->name;
const char *name;
DLLReference *dllref;
dllindex = p->dll_index;
if (dllindex)
name = (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;
@ -832,10 +838,12 @@ static void pe_build_imports(struct pe_info *pe)
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 = (ADDR3264)GetProcAddress(dllref->handle, name);
v = imp_sym->st_value;
if (dllref) {
if ( !dllref->handle )
dllref->handle = LoadLibrary(dllref->name);
v = (ADDR3264)GetProcAddress(dllref->handle, name);
}
if (!v)
error_noabort("undefined symbol '%s'", name);
}
@ -1214,9 +1222,6 @@ static int pe_check_symbols(struct pe_info *pe)
if (0 == imp_sym)
goto not_found;
is = pe_add_import(pe, imp_sym);
if (!is)
goto not_found;
if (type == STT_NOTYPE) {
/* symbols from assembler have no type, find out which */
@ -1226,6 +1231,8 @@ static int pe_check_symbols(struct pe_info *pe)
type = STT_OBJECT;
}
is = pe_add_import(pe, imp_sym);
if (type == STT_FUNC) {
unsigned long offset = is->thk_offset;
if (offset) {
@ -1424,6 +1431,75 @@ static void pe_print_sections(TCCState *s1, const char *fname)
}
#endif
/* ------------------------------------------------------------- */
/* helper function for load/store to insert one more indirection */
ST_FUNC SValue *pe_getimport(SValue *sv, SValue *v2)
{
Sym *sym;
ElfW(Sym) *esym;
int r2;
if ((sv->r & (VT_VALMASK|VT_SYM)) != (VT_CONST|VT_SYM) || (sv->r2 != VT_CONST))
return sv;
sym = sv->sym;
if ((sym->type.t & (VT_EXTERN|VT_STATIC)) != VT_EXTERN)
return sv;
if (!sym->c)
put_extern_sym(sym, NULL, 0, 0);
esym = &((ElfW(Sym) *)symtab_section->data)[sym->c];
if (!(esym->st_other & 4))
return sv;
// printf("import %04x %04x %04x %s\n", sv->type.t, 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 (sv->c.ui) {
vpushv(v2);
vpushi(sv->c.ui);
gen_opi('+');
*v2 = *vtop--;
}
v2->type.t = sv->type.t;
v2->r |= sv->r & VT_LVAL;
return v2;
}
ST_FUNC int pe_putimport(TCCState *s1, int dllindex, const char *name, const void *value)
{
return add_elf_sym(
s1->dynsymtab_section,
(uplong)value,
dllindex, /* st_size */
ELFW_ST_INFO(STB_GLOBAL, STT_NOTYPE),
0,
value ? SHN_ABS : SHN_UNDEF,
name
);
}
static int add_dllref(TCCState *s1, const char *dllname)
{
DLLReference *dllref;
int i;
for (i = 0; i < s1->nb_loaded_dlls; ++i)
if (0 == strcmp(s1->loaded_dlls[i]->name, dllname))
return i + 1;
dllref = tcc_mallocz(sizeof(DLLReference) + strlen(dllname));
strcpy(dllref->name, dllname);
dynarray_add((void ***) &s1->loaded_dlls, &s1->nb_loaded_dlls, dllref);
return s1->nb_loaded_dlls;
}
/* ------------------------------------------------------------- */
static int read_mem(FILE *fp, unsigned offset, void *buffer, unsigned len)
@ -1503,8 +1579,7 @@ static char *get_line(char *line, int size, FILE *fp)
/* ------------------------------------------------------------- */
static int pe_load_def(TCCState *s1, FILE *fp)
{
DLLReference *dllref;
int state = 0, ret = -1;
int state = 0, ret = -1, dllindex = 0;
char line[400], dllname[80], *p;
for (;;) {
@ -1528,16 +1603,11 @@ static int pe_load_def(TCCState *s1, FILE *fp)
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);
dllindex = add_dllref(s1, dllname);
++state;
default:
add_elf_sym(s1->dynsymtab_section,
s1->nb_loaded_dlls, 0,
ELFW_ST_INFO(STB_GLOBAL, STT_FUNC), 0,
text_section->sh_num, p);
pe_putimport(s1, dllindex, p, NULL);
continue;
}
}
@ -1552,24 +1622,16 @@ quit:
static int pe_load_dll(TCCState *s1, const char *dllname, FILE *fp)
{
int i = 0;
char *p, *q;
int index;
p = get_export_names(fp);
if (p) {
DLLReference *dllref;
dllref = tcc_mallocz(sizeof(DLLReference) + strlen(dllname));
strcpy(dllref->name, dllname);
dynarray_add((void ***) &s1->loaded_dlls, &s1->nb_loaded_dlls, dllref);
for (q = p, i = 0; *q; ++i) {
add_elf_sym(s1->dynsymtab_section,
s1->nb_loaded_dlls, 0,
ELFW_ST_INFO(STB_GLOBAL, STT_FUNC), 0,
text_section->sh_num, q);
q += 1 + strlen(q);
}
tcc_free(p);
}
return i ? 0 : -1;
if (!p)
return -1;
index = add_dllref(s1, dllname);
for (q = p; *q; q += 1 + strlen(q))
pe_putimport(s1, index, q, NULL);
tcc_free(p);
return 0;
}
/* ------------------------------------------------------------- */
@ -1605,32 +1667,6 @@ ST_FUNC int pe_add_dll(struct TCCState *s, const char *libname)
return -1;
}
/* ------------------------------------------------------------- */
/* helper function for load/store to insert one more indirection */
ST_FUNC int pe_dllimport(int r, SValue *sv, void (*fn)(int r, SValue *sv))
{
int t;
if ((sv->r & (VT_VALMASK|VT_SYM|VT_CONST)) != (VT_SYM|VT_CONST))
return 0;
t = sv->sym->type.t;
if (0 == (t & VT_IMPORT))
return 0;
sv->sym->type.t = t & ~VT_IMPORT;
//printf("import %x %04x %s\n", t, ind, get_tok_str(sv->sym->v, NULL));
vpushv(sv);
vtop->type.t &= ~(VT_ARRAY|VT_IMPORT);
mk_pointer(&vtop->type);
indir();
fn(r, vtop);
--vtop;
sv->sym->type.t = t;
return 1;
}
/* ------------------------------------------------------------- */
#ifdef TCC_TARGET_X86_64
ST_FUNC void pe_add_unwind_data(unsigned start, unsigned end, unsigned stack)
@ -1702,6 +1738,8 @@ static void pe_add_runtime_ex(TCCState *s1, struct pe_info *pe)
/* need this for 'tccelf.c:relocate_section()' */
s1->output_type = TCC_OUTPUT_EXE;
}
else
pe_type = PE_EXE;
start_symbol =
TCC_OUTPUT_MEMORY == s1->output_type
@ -1731,9 +1769,12 @@ static void pe_add_runtime_ex(TCCState *s1, struct pe_info *pe)
}
}
if (TCC_OUTPUT_MEMORY == s1->output_type)
pe_type = PE_RUN;
if (start_symbol) {
addr = (uplong)tcc_get_symbol_err(s1, start_symbol);
if (s1->output_type == TCC_OUTPUT_MEMORY && addr)
if (PE_RUN == pe_type && addr)
/* for -run GUI's, put '_runwinmain' instead of 'main' */
add_elf_sym(symtab_section,
addr, 0,
@ -1823,7 +1864,6 @@ ST_FUNC int pe_output_file(TCCState * s1, const char *filename)
#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);
}

42
win32/tools/tiny_impdef.c
View File

@ -60,6 +60,7 @@ int main(int argc, char **argv)
fp = op = NULL;
v = 0;
ret = 1;
p = NULL;
for (i = 1; i < argc; ++i) {
const char *a = argv[i];
@ -90,19 +91,20 @@ usage:
if (0 == outfile[0])
{
strcpy(outfile, file_basename(infile));
p = strrchr(outfile, '.');
if (NULL == p)
p = strchr(outfile, 0);
strcpy(p, ".def");
q = strrchr(outfile, '.');
if (NULL == q)
q = strchr(outfile, 0);
strcpy(q, ".def");
}
file = infile;
#ifdef _WIN32
for (pp = ext; *pp; ++pp)
if (SearchPath(NULL, file, *pp, sizeof path, path, NULL)) {
file = path;
break;
}
pp = ext;
do if (SearchPath(NULL, file, *pp, sizeof path, path, NULL)) {
file = path;
break;
} while (*pp++);
#endif
fp = fopen(file, "rb");
@ -110,6 +112,14 @@ usage:
fprintf(stderr, "tiny_impdef: no such file: %s\n", infile);
goto the_end;
}
if (v)
printf("--> %s\n", file);
p = get_export_names(fp);
if (NULL == p) {
fprintf(stderr, "tiny_impdef: could not get exported function names.\n");
goto the_end;
}
op = fopen(outfile, "w");
if (NULL == op) {
@ -117,21 +127,11 @@ usage:
goto the_end;
}
if (v)
printf("--> %s\n", infile);
fprintf(op, "LIBRARY %s\n\nEXPORTS\n", file_basename(infile));
p = get_export_names(fp);
if (NULL == p) {
fprintf(stderr, "tiny_impdef: could not get exported function names.\n");
goto the_end;
}
fprintf(op, "LIBRARY %s\n\nEXPORTS\n", file_basename(file));
for (q = p, i = 0; *q; ++i) {
fprintf(op, "%s\n", q);
q += strlen(q) + 1;
}
free(p);
if (v) {
printf("<-- %s\n", outfile);
@ -141,6 +141,8 @@ usage:
ret = 0;
the_end:
if (p)
free(p);
if (fp)
fclose(fp);
if (op)

8
x86_64-gen.c
View File

@ -335,8 +335,8 @@ void load(int r, SValue *sv)
SValue v1;
#ifdef TCC_TARGET_PE
if (pe_dllimport(r, sv, load))
return;
SValue v2;
sv = pe_getimport(sv, &v2);
#endif
fr = sv->r;
@ -469,8 +469,8 @@ void store(int r, SValue *v)
int pic = 0;
#ifdef TCC_TARGET_PE
if (pe_dllimport(r, v, store))
return;
SValue v2;
v = pe_getimport(v, &v2);
#endif
ft = v->type.t;