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tinycc/libtcc.c
Timo VJ Lähde 197a6acb30 Avoid a crash with weak symbols for "make test" 
Patch from the mailing list by Timo VJ Lähde

--
By by ... Detlef
2010-04-05 01:08:49 +02:00

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/*
* TCC - Tiny C Compiler
*
* Copyright (c) 2001-2004 Fabrice Bellard
*
* 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"
/********************************************************/
/* global variables */
/* use GNU C extensions */
ST_DATA int gnu_ext = 1;
/* use TinyCC extensions */
ST_DATA int tcc_ext = 1;
/* XXX: get rid of this ASAP */
ST_DATA struct TCCState *tcc_state;
#ifdef CONFIG_TCC_BACKTRACE
ST_DATA int num_callers = 6;
ST_DATA const char **rt_bound_error_msg;
ST_DATA void *rt_prog_main;
#endif
/********************************************************/
#ifndef NOTALLINONE
#include "tccpp.c"
#include "tccgen.c"
#include "tccelf.c"
#include "tccrun.c"
#ifdef TCC_TARGET_I386
#include "i386-gen.c"
#endif
#ifdef TCC_TARGET_ARM
#include "arm-gen.c"
#endif
#ifdef TCC_TARGET_C67
#include "c67-gen.c"
#endif
#ifdef TCC_TARGET_X86_64
#include "x86_64-gen.c"
#endif
#ifdef CONFIG_TCC_ASM
#include "tccasm.c"
#if defined TCC_TARGET_I386 || defined TCC_TARGET_X86_64
#include "i386-asm.c"
#endif
#endif
#ifdef TCC_TARGET_COFF
#include "tcccoff.c"
#endif
#ifdef TCC_TARGET_PE
#include "tccpe.c"
#endif
#endif /* ALL_IN_ONE */
/********************************************************/
#ifndef CONFIG_TCC_ASM
ST_FUNC void asm_instr(void)
{
error("inline asm() not supported");
}
ST_FUNC void asm_global_instr(void)
{
error("inline asm() not supported");
}
#endif
/********************************************************/
#ifdef _WIN32
static char *normalize_slashes(char *path)
{
char *p;
for (p = path; *p; ++p)
if (*p == '\\')
*p = '/';
return path;
}
static HMODULE tcc_module;
/* on win32, we suppose the lib and includes are at the location of 'tcc.exe' */
static void tcc_set_lib_path_w32(TCCState *s)
{
char path[1024], *p;
GetModuleFileNameA(tcc_module, path, sizeof path);
p = tcc_basename(normalize_slashes(strlwr(path)));
if (p - 5 > path && 0 == strncmp(p - 5, "/bin/", 5))
p -= 5;
else if (p > path)
p--;
*p = 0;
tcc_set_lib_path(s, path);
}
#ifndef CONFIG_TCC_STATIC
void dlclose(void *p)
{
FreeLibrary((HMODULE)p);
}
#endif
#ifdef LIBTCC_AS_DLL
BOOL WINAPI DllMain (HANDLE hDll, DWORD dwReason, LPVOID lpReserved)
{
if (DLL_PROCESS_ATTACH == dwReason)
tcc_module = hDll;
return TRUE;
}
#endif
#endif
/********************************************************/
/* copy a string and truncate it. */
PUB_FUNC char *pstrcpy(char *buf, int buf_size, const char *s)
{
char *q, *q_end;
int c;
if (buf_size > 0) {
q = buf;
q_end = buf + buf_size - 1;
while (q < q_end) {
c = *s++;
if (c == '\0')
break;
*q++ = c;
}
*q = '\0';
}
return buf;
}
/* strcat and truncate. */
PUB_FUNC char *pstrcat(char *buf, int buf_size, const char *s)
{
int len;
len = strlen(buf);
if (len < buf_size)
pstrcpy(buf + len, buf_size - len, s);
return buf;
}
/* extract the basename of a file */
PUB_FUNC char *tcc_basename(const char *name)
{
char *p = strchr(name, 0);
while (p > name && !IS_PATHSEP(p[-1]))
--p;
return p;
}
PUB_FUNC char *tcc_fileextension (const char *name)
{
char *b = tcc_basename(name);
char *e = strrchr(b, '.');
return e ? e : strchr(b, 0);
}
/********************************************************/
/* memory management */
#undef free
#undef malloc
#undef realloc
#ifdef MEM_DEBUG
int mem_cur_size;
int mem_max_size;
unsigned malloc_usable_size(void*);
#endif
PUB_FUNC void tcc_free(void *ptr)
{
#ifdef MEM_DEBUG
mem_cur_size -= malloc_usable_size(ptr);
#endif
free(ptr);
}
PUB_FUNC void *tcc_malloc(unsigned long size)
{
void *ptr;
ptr = malloc(size);
if (!ptr && size)
error("memory full");
#ifdef MEM_DEBUG
mem_cur_size += malloc_usable_size(ptr);
if (mem_cur_size > mem_max_size)
mem_max_size = mem_cur_size;
#endif
return ptr;
}
PUB_FUNC void *tcc_mallocz(unsigned long size)
{
void *ptr;
ptr = tcc_malloc(size);
memset(ptr, 0, size);
return ptr;
}
PUB_FUNC void *tcc_realloc(void *ptr, unsigned long size)
{
void *ptr1;
#ifdef MEM_DEBUG
mem_cur_size -= malloc_usable_size(ptr);
#endif
ptr1 = realloc(ptr, size);
#ifdef MEM_DEBUG
/* NOTE: count not correct if alloc error, but not critical */
mem_cur_size += malloc_usable_size(ptr1);
if (mem_cur_size > mem_max_size)
mem_max_size = mem_cur_size;
#endif
return ptr1;
}
PUB_FUNC char *tcc_strdup(const char *str)
{
char *ptr;
ptr = tcc_malloc(strlen(str) + 1);
strcpy(ptr, str);
return ptr;
}
PUB_FUNC void tcc_memstats(void)
{
#ifdef MEM_DEBUG
printf("memory in use: %d\n", mem_cur_size);
#endif
}
#define free(p) use_tcc_free(p)
#define malloc(s) use_tcc_malloc(s)
#define realloc(p, s) use_tcc_realloc(p, s)
/********************************************************/
/* dynarrays */
PUB_FUNC void dynarray_add(void ***ptab, int *nb_ptr, void *data)
{
int nb, nb_alloc;
void **pp;
nb = *nb_ptr;
pp = *ptab;
/* every power of two we double array size */
if ((nb & (nb - 1)) == 0) {
if (!nb)
nb_alloc = 1;
else
nb_alloc = nb * 2;
pp = tcc_realloc(pp, nb_alloc * sizeof(void *));
if (!pp)
error("memory full");
*ptab = pp;
}
pp[nb++] = data;
*nb_ptr = nb;
}
PUB_FUNC void dynarray_reset(void *pp, int *n)
{
void **p;
for (p = *(void***)pp; *n; ++p, --*n)
if (*p)
tcc_free(*p);
tcc_free(*(void**)pp);
*(void**)pp = NULL;
}
/* we use our own 'finite' function to avoid potential problems with
non standard math libs */
/* XXX: endianness dependent */
ST_FUNC int ieee_finite(double d)
{
int *p = (int *)&d;
return ((unsigned)((p[1] | 0x800fffff) + 1)) >> 31;
}
/********************************************************/
ST_FUNC Section *new_section(TCCState *s1, const char *name, int sh_type, int sh_flags)
{
Section *sec;
sec = tcc_mallocz(sizeof(Section) + strlen(name));
strcpy(sec->name, name);
sec->sh_type = sh_type;
sec->sh_flags = sh_flags;
switch(sh_type) {
case SHT_HASH:
case SHT_REL:
case SHT_RELA:
case SHT_DYNSYM:
case SHT_SYMTAB:
case SHT_DYNAMIC:
sec->sh_addralign = 4;
break;
case SHT_STRTAB:
sec->sh_addralign = 1;
break;
default:
sec->sh_addralign = 32; /* default conservative alignment */
break;
}
if (sh_flags & SHF_PRIVATE) {
dynarray_add((void ***)&s1->priv_sections, &s1->nb_priv_sections, sec);
} else {
sec->sh_num = s1->nb_sections;
dynarray_add((void ***)&s1->sections, &s1->nb_sections, sec);
}
return sec;
}
static void free_section(Section *s)
{
tcc_free(s->data);
}
/* realloc section and set its content to zero */
ST_FUNC void section_realloc(Section *sec, unsigned long new_size)
{
unsigned long size;
unsigned char *data;
size = sec->data_allocated;
if (size == 0)
size = 1;
while (size < new_size)
size = size * 2;
data = tcc_realloc(sec->data, size);
if (!data)
error("memory full");
memset(data + sec->data_allocated, 0, size - sec->data_allocated);
sec->data = data;
sec->data_allocated = size;
}
/* reserve at least 'size' bytes in section 'sec' from
sec->data_offset. */
ST_FUNC void *section_ptr_add(Section *sec, unsigned long size)
{
unsigned long offset, offset1;
offset = sec->data_offset;
offset1 = offset + size;
if (offset1 > sec->data_allocated)
section_realloc(sec, offset1);
sec->data_offset = offset1;
return sec->data + offset;
}
/* reserve at least 'size' bytes from section start */
ST_FUNC void section_reserve(Section *sec, unsigned long size)
{
if (size > sec->data_allocated)
section_realloc(sec, size);
if (size > sec->data_offset)
sec->data_offset = size;
}
/* return a reference to a section, and create it if it does not
exists */
ST_FUNC Section *find_section(TCCState *s1, const char *name)
{
Section *sec;
int i;
for(i = 1; i < s1->nb_sections; i++) {
sec = s1->sections[i];
if (!strcmp(name, sec->name))
return sec;
}
/* sections are created as PROGBITS */
return new_section(s1, name, SHT_PROGBITS, SHF_ALLOC);
}
/* update sym->c so that it points to an external symbol in section
'section' with value 'value' */
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;
ElfW(Sym) *esym;
const char *name;
char buf1[256];
if (section == NULL)
sh_num = SHN_UNDEF;
else if (section == SECTION_ABS)
sh_num = SHN_ABS;
else
sh_num = section->sh_num;
if ((sym->type.t & VT_BTYPE) == VT_FUNC) {
sym_type = STT_FUNC;
} else if ((sym->type.t & VT_BTYPE) == VT_VOID) {
sym_type = STT_NOTYPE;
} else {
sym_type = STT_OBJECT;
}
if (sym->type.t & VT_STATIC)
sym_bind = STB_LOCAL;
else {
if (sym->type.ref && FUNC_WEAK(sym->type.ref->r))
sym_bind = STB_WEAK;
else
sym_bind = STB_GLOBAL;
}
if (!sym->c) {
name = get_tok_str(sym->v, NULL);
#ifdef CONFIG_TCC_BCHECK
if (tcc_state->do_bounds_check) {
char buf[32];
/* XXX: avoid doing that for statics ? */
/* if bound checking is activated, we change some function
names by adding the "__bound" prefix */
switch(sym->v) {
#ifdef TCC_TARGET_PE
/* XXX: we rely only on malloc hooks */
case TOK_malloc:
case TOK_free:
case TOK_realloc:
case TOK_memalign:
case TOK_calloc:
#endif
case TOK_memcpy:
case TOK_memmove:
case TOK_memset:
case TOK_strlen:
case TOK_strcpy:
case TOK_alloca:
strcpy(buf, "__bound_");
strcat(buf, name);
name = buf;
break;
}
}
#endif
other = 0;
#ifdef TCC_TARGET_PE
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] = '_';
pstrcpy(buf1 + 1, sizeof(buf1) - 1, name);
name = buf1;
}
info = ELFW(ST_INFO)(sym_bind, sym_type);
sym->c = add_elf_sym(symtab_section, value, size, info, other, sh_num, name);
} else {
esym = &((ElfW(Sym) *)symtab_section->data)[sym->c];
esym->st_value = value;
esym->st_size = size;
esym->st_shndx = sh_num;
}
}
ST_FUNC void put_extern_sym(Sym *sym, Section *section,
unsigned long value, unsigned long size)
{
put_extern_sym2(sym, section, value, size, 1);
}
/* add a new relocation entry to symbol 'sym' in section 's' */
ST_FUNC void greloc(Section *s, Sym *sym, unsigned long offset, int type)
{
int c = 0;
if (sym) {
if (0 == sym->c)
put_extern_sym(sym, NULL, 0, 0);
c = sym->c;
}
/* now we can add ELF relocation info */
put_elf_reloc(symtab_section, s, offset, type, c);
}
/********************************************************/
static void strcat_vprintf(char *buf, int buf_size, const char *fmt, va_list ap)
{
int len;
len = strlen(buf);
vsnprintf(buf + len, buf_size - len, fmt, ap);
}
static void strcat_printf(char *buf, int buf_size, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
strcat_vprintf(buf, buf_size, fmt, ap);
va_end(ap);
}
static void error1(TCCState *s1, int is_warning, const char *fmt, va_list ap)
{
char buf[2048];
BufferedFile **f;
buf[0] = '\0';
if (file) {
for(f = s1->include_stack; f < s1->include_stack_ptr; f++)
strcat_printf(buf, sizeof(buf), "In file included from %s:%d:\n",
(*f)->filename, (*f)->line_num);
if (file->line_num > 0) {
strcat_printf(buf, sizeof(buf),
"%s:%d: ", file->filename, file->line_num);
} else {
strcat_printf(buf, sizeof(buf),
"%s: ", file->filename);
}
} else {
strcat_printf(buf, sizeof(buf),
"tcc: ");
}
if (is_warning)
strcat_printf(buf, sizeof(buf), "warning: ");
else
strcat_printf(buf, sizeof(buf), "error: ");
strcat_vprintf(buf, sizeof(buf), fmt, ap);
if (!s1->error_func) {
/* default case: stderr */
fprintf(stderr, "%s\n", buf);
} else {
s1->error_func(s1->error_opaque, buf);
}
if (!is_warning || s1->warn_error)
s1->nb_errors++;
}
LIBTCCAPI void tcc_set_error_func(TCCState *s, void *error_opaque,
void (*error_func)(void *opaque, const char *msg))
{
s->error_opaque = error_opaque;
s->error_func = error_func;
}
/* error without aborting current compilation */
PUB_FUNC void error_noabort(const char *fmt, ...)
{
TCCState *s1 = tcc_state;
va_list ap;
va_start(ap, fmt);
error1(s1, 0, fmt, ap);
va_end(ap);
}
PUB_FUNC void error(const char *fmt, ...)
{
TCCState *s1 = tcc_state;
va_list ap;
va_start(ap, fmt);
error1(s1, 0, fmt, ap);
va_end(ap);
/* better than nothing: in some cases, we accept to handle errors */
if (s1->error_set_jmp_enabled) {
longjmp(s1->error_jmp_buf, 1);
} else {
/* XXX: eliminate this someday */
exit(1);
}
}
PUB_FUNC void expect(const char *msg)
{
error("%s expected", msg);
}
PUB_FUNC void warning(const char *fmt, ...)
{
TCCState *s1 = tcc_state;
va_list ap;
if (s1->warn_none)
return;
va_start(ap, fmt);
error1(s1, 1, fmt, ap);
va_end(ap);
}
/********************************************************/
/* I/O layer */
ST_FUNC BufferedFile *tcc_open(TCCState *s1, const char *filename)
{
int fd;
BufferedFile *bf;
if (strcmp(filename, "-") == 0)
fd = 0, filename = "stdin";
else
fd = open(filename, O_RDONLY | O_BINARY);
if ((s1->verbose == 2 && fd >= 0) || s1->verbose == 3)
printf("%s %*s%s\n", fd < 0 ? "nf":"->",
(int)(s1->include_stack_ptr - s1->include_stack), "", filename);
if (fd < 0)
return NULL;
bf = tcc_malloc(sizeof(BufferedFile));
bf->fd = fd;
bf->buf_ptr = bf->buffer;
bf->buf_end = bf->buffer;
bf->buffer[0] = CH_EOB; /* put eob symbol */
pstrcpy(bf->filename, sizeof(bf->filename), filename);
#ifdef _WIN32
normalize_slashes(bf->filename);
#endif
bf->line_num = 1;
bf->ifndef_macro = 0;
bf->ifdef_stack_ptr = s1->ifdef_stack_ptr;
// printf("opening '%s'\n", filename);
return bf;
}
ST_FUNC void tcc_close(BufferedFile *bf)
{
total_lines += bf->line_num;
close(bf->fd);
tcc_free(bf);
}
/* compile the C file opened in 'file'. Return non zero if errors. */
static int tcc_compile(TCCState *s1)
{
Sym *define_start;
char buf[512];
volatile int section_sym;
#ifdef INC_DEBUG
printf("%s: **** new file\n", file->filename);
#endif
preprocess_init(s1);
cur_text_section = NULL;
funcname = "";
anon_sym = SYM_FIRST_ANOM;
/* file info: full path + filename */
section_sym = 0; /* avoid warning */
if (s1->do_debug) {
section_sym = put_elf_sym(symtab_section, 0, 0,
ELFW(ST_INFO)(STB_LOCAL, STT_SECTION), 0,
text_section->sh_num, NULL);
getcwd(buf, sizeof(buf));
#ifdef _WIN32
normalize_slashes(buf);
#endif
pstrcat(buf, sizeof(buf), "/");
put_stabs_r(buf, N_SO, 0, 0,
text_section->data_offset, text_section, section_sym);
put_stabs_r(file->filename, N_SO, 0, 0,
text_section->data_offset, text_section, section_sym);
}
/* an elf symbol of type STT_FILE must be put so that STB_LOCAL
symbols can be safely used */
put_elf_sym(symtab_section, 0, 0,
ELFW(ST_INFO)(STB_LOCAL, STT_FILE), 0,
SHN_ABS, file->filename);
/* define some often used types */
int_type.t = VT_INT;
char_pointer_type.t = VT_BYTE;
mk_pointer(&char_pointer_type);
func_old_type.t = VT_FUNC;
func_old_type.ref = sym_push(SYM_FIELD, &int_type, FUNC_CDECL, FUNC_OLD);
#if defined(TCC_ARM_EABI) && defined(TCC_ARM_VFP)
float_type.t = VT_FLOAT;
double_type.t = VT_DOUBLE;
func_float_type.t = VT_FUNC;
func_float_type.ref = sym_push(SYM_FIELD, &float_type, FUNC_CDECL, FUNC_OLD);
func_double_type.t = VT_FUNC;
func_double_type.ref = sym_push(SYM_FIELD, &double_type, FUNC_CDECL, FUNC_OLD);
#endif
#if 0
/* define 'void *alloca(unsigned int)' builtin function */
{
Sym *s1;
p = anon_sym++;
sym = sym_push(p, mk_pointer(VT_VOID), FUNC_CDECL, FUNC_NEW);
s1 = sym_push(SYM_FIELD, VT_UNSIGNED | VT_INT, 0, 0);
s1->next = NULL;
sym->next = s1;
sym_push(TOK_alloca, VT_FUNC | (p << VT_STRUCT_SHIFT), VT_CONST, 0);
}
#endif
define_start = define_stack;
nocode_wanted = 1;
if (setjmp(s1->error_jmp_buf) == 0) {
s1->nb_errors = 0;
s1->error_set_jmp_enabled = 1;
ch = file->buf_ptr[0];
tok_flags = TOK_FLAG_BOL | TOK_FLAG_BOF;
parse_flags = PARSE_FLAG_PREPROCESS | PARSE_FLAG_TOK_NUM;
next();
decl(VT_CONST);
if (tok != TOK_EOF)
expect("declaration");
/* end of translation unit info */
if (s1->do_debug) {
put_stabs_r(NULL, N_SO, 0, 0,
text_section->data_offset, text_section, section_sym);
}
}
s1->error_set_jmp_enabled = 0;
/* reset define stack, but leave -Dsymbols (may be incorrect if
they are undefined) */
free_defines(define_start);
gen_inline_functions();
sym_pop(&global_stack, NULL);
sym_pop(&local_stack, NULL);
return s1->nb_errors != 0 ? -1 : 0;
}
LIBTCCAPI int tcc_compile_string(TCCState *s, const char *str)
{
BufferedFile bf1, *bf = &bf1;
int ret, len;
char *buf;
/* init file structure */
bf->fd = -1;
/* XXX: avoid copying */
len = strlen(str);
buf = tcc_malloc(len + 1);
if (!buf)
return -1;
memcpy(buf, str, len);
buf[len] = CH_EOB;
bf->buf_ptr = buf;
bf->buf_end = buf + len;
pstrcpy(bf->filename, sizeof(bf->filename), "<string>");
bf->line_num = 1;
file = bf;
ret = tcc_compile(s);
file = NULL;
tcc_free(buf);
/* currently, no need to close */
return ret;
}
/* define a preprocessor symbol. A value can also be provided with the '=' operator */
LIBTCCAPI void tcc_define_symbol(TCCState *s1, const char *sym, const char *value)
{
BufferedFile bf1, *bf = &bf1;
pstrcpy(bf->buffer, IO_BUF_SIZE, sym);
pstrcat(bf->buffer, IO_BUF_SIZE, " ");
/* default value */
if (!value)
value = "1";
pstrcat(bf->buffer, IO_BUF_SIZE, value);
/* init file structure */
bf->fd = -1;
bf->buf_ptr = bf->buffer;
bf->buf_end = bf->buffer + strlen(bf->buffer);
*bf->buf_end = CH_EOB;
bf->filename[0] = '\0';
bf->line_num = 1;
file = bf;
s1->include_stack_ptr = s1->include_stack;
/* parse with define parser */
ch = file->buf_ptr[0];
next_nomacro();
parse_define();
file = NULL;
}
/* undefine a preprocessor symbol */
LIBTCCAPI void tcc_undefine_symbol(TCCState *s1, const char *sym)
{
TokenSym *ts;
Sym *s;
ts = tok_alloc(sym, strlen(sym));
s = define_find(ts->tok);
/* undefine symbol by putting an invalid name */
if (s)
define_undef(s);
}
static void tcc_cleanup(void)
{
int i, n;
if (NULL == tcc_state)
return;
tcc_state = NULL;
/* free -D defines */
free_defines(NULL);
/* free tokens */
n = tok_ident - TOK_IDENT;
for(i = 0; i < n; i++)
tcc_free(table_ident[i]);
tcc_free(table_ident);
/* free sym_pools */
dynarray_reset(&sym_pools, &nb_sym_pools);
/* string buffer */
cstr_free(&tokcstr);
/* reset symbol stack */
sym_free_first = NULL;
/* cleanup from error/setjmp */
macro_ptr = NULL;
}
LIBTCCAPI TCCState *tcc_new(void)
{
TCCState *s;
char buffer[100];
int a,b,c;
tcc_cleanup();
s = tcc_mallocz(sizeof(TCCState));
if (!s)
return NULL;
tcc_state = s;
#ifdef _WIN32
tcc_set_lib_path_w32(s);
#else
tcc_set_lib_path(s, CONFIG_TCCDIR);
#endif
s->output_type = TCC_OUTPUT_MEMORY;
preprocess_new();
/* we add dummy defines for some special macros to speed up tests
and to have working defined() */
define_push(TOK___LINE__, MACRO_OBJ, NULL, NULL);
define_push(TOK___FILE__, MACRO_OBJ, NULL, NULL);
define_push(TOK___DATE__, MACRO_OBJ, NULL, NULL);
define_push(TOK___TIME__, MACRO_OBJ, NULL, NULL);
/* standard defines */
tcc_define_symbol(s, "__STDC__", NULL);
tcc_define_symbol(s, "__STDC_VERSION__", "199901L");
#if defined(TCC_TARGET_I386)
tcc_define_symbol(s, "__i386__", NULL);
tcc_define_symbol(s, "__i386", NULL);
tcc_define_symbol(s, "i386", NULL);
#endif
#if defined(TCC_TARGET_X86_64)
tcc_define_symbol(s, "__x86_64__", NULL);
#endif
#if defined(TCC_TARGET_ARM)
tcc_define_symbol(s, "__ARM_ARCH_4__", NULL);
tcc_define_symbol(s, "__arm_elf__", NULL);
tcc_define_symbol(s, "__arm_elf", NULL);
tcc_define_symbol(s, "arm_elf", NULL);
tcc_define_symbol(s, "__arm__", NULL);
tcc_define_symbol(s, "__arm", NULL);
tcc_define_symbol(s, "arm", NULL);
tcc_define_symbol(s, "__APCS_32__", NULL);
#endif
#ifdef TCC_TARGET_PE
tcc_define_symbol(s, "_WIN32", NULL);
#ifdef TCC_TARGET_X86_64
tcc_define_symbol(s, "_WIN64", NULL);
#endif
#else
tcc_define_symbol(s, "__unix__", NULL);
tcc_define_symbol(s, "__unix", NULL);
tcc_define_symbol(s, "unix", NULL);
#if defined(__FreeBSD__)
#define str(s) #s
tcc_define_symbol(s, "__FreeBSD__", str( __FreeBSD__));
#undef str
#endif
#if defined(__linux)
tcc_define_symbol(s, "__linux__", NULL);
tcc_define_symbol(s, "__linux", NULL);
#endif
#endif
/* tiny C specific defines */
sscanf(TCC_VERSION, "%d.%d.%d", &a, &b, &c);
sprintf(buffer, "%d", a*10000 + b*100 + c);
tcc_define_symbol(s, "__TINYC__", buffer);
/* tiny C & gcc defines */
#if defined TCC_TARGET_PE && defined TCC_TARGET_X86_64
tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long long");
tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long long");
#else
tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long");
tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long");
#endif
#ifdef TCC_TARGET_PE
tcc_define_symbol(s, "__WCHAR_TYPE__", "unsigned short");
#else
tcc_define_symbol(s, "__WCHAR_TYPE__", "int");
#endif
#ifndef TCC_TARGET_PE
/* default library paths */
# if defined(TCC_TARGET_X86_64_CENTOS)
tcc_add_library_path(s, CONFIG_SYSROOT "/usr/lib64");
tcc_add_library_path(s, CONFIG_SYSROOT "/lib64");
tcc_add_library_path(s, CONFIG_SYSROOT "/usr/local/lib64");
# else
tcc_add_library_path(s, CONFIG_SYSROOT "/usr/lib");
tcc_add_library_path(s, CONFIG_SYSROOT "/lib");
tcc_add_library_path(s, CONFIG_SYSROOT "/usr/local/lib");
# endif
#endif
/* no section zero */
dynarray_add((void ***)&s->sections, &s->nb_sections, NULL);
/* create standard sections */
text_section = new_section(s, ".text", SHT_PROGBITS, SHF_ALLOC | SHF_EXECINSTR);
data_section = new_section(s, ".data", SHT_PROGBITS, SHF_ALLOC | SHF_WRITE);
bss_section = new_section(s, ".bss", SHT_NOBITS, SHF_ALLOC | SHF_WRITE);
/* symbols are always generated for linking stage */
symtab_section = new_symtab(s, ".symtab", SHT_SYMTAB, 0,
".strtab",
".hashtab", SHF_PRIVATE);
strtab_section = symtab_section->link;
/* private symbol table for dynamic symbols */
s->dynsymtab_section = new_symtab(s, ".dynsymtab", SHT_SYMTAB, SHF_PRIVATE,
".dynstrtab",
".dynhashtab", SHF_PRIVATE);
s->alacarte_link = 1;
s->nocommon = 1;
#ifdef CHAR_IS_UNSIGNED
s->char_is_unsigned = 1;
#endif
#if defined(TCC_TARGET_PE) && 0
/* XXX: currently the PE linker is not ready to support that */
s->leading_underscore = 1;
#endif
if (s->section_align == 0)
s->section_align = ELF_PAGE_SIZE;
#ifdef TCC_TARGET_I386
s->seg_size = 32;
#endif
return s;
}
LIBTCCAPI void tcc_delete(TCCState *s1)
{
int i;
tcc_cleanup();
/* free all sections */
for(i = 1; i < s1->nb_sections; i++)
free_section(s1->sections[i]);
dynarray_reset(&s1->sections, &s1->nb_sections);
for(i = 0; i < s1->nb_priv_sections; i++)
free_section(s1->priv_sections[i]);
dynarray_reset(&s1->priv_sections, &s1->nb_priv_sections);
/* free any loaded DLLs */
for ( i = 0; i < s1->nb_loaded_dlls; i++) {
DLLReference *ref = s1->loaded_dlls[i];
if ( ref->handle )
dlclose(ref->handle);
}
/* free loaded dlls array */
dynarray_reset(&s1->loaded_dlls, &s1->nb_loaded_dlls);
/* free library paths */
dynarray_reset(&s1->library_paths, &s1->nb_library_paths);
/* free include paths */
dynarray_reset(&s1->cached_includes, &s1->nb_cached_includes);
dynarray_reset(&s1->include_paths, &s1->nb_include_paths);
dynarray_reset(&s1->sysinclude_paths, &s1->nb_sysinclude_paths);
tcc_free(s1->tcc_lib_path);
tcc_free(s1->runtime_mem);
tcc_free(s1);
}
LIBTCCAPI int tcc_add_include_path(TCCState *s1, const char *pathname)
{
char *pathname1;
pathname1 = tcc_strdup(pathname);
dynarray_add((void ***)&s1->include_paths, &s1->nb_include_paths, pathname1);
return 0;
}
LIBTCCAPI int tcc_add_sysinclude_path(TCCState *s1, const char *pathname)
{
char *pathname1;
pathname1 = tcc_strdup(pathname);
dynarray_add((void ***)&s1->sysinclude_paths, &s1->nb_sysinclude_paths, pathname1);
return 0;
}
static int tcc_add_file_internal(TCCState *s1, const char *filename, int flags)
{
const char *ext;
ElfW(Ehdr) ehdr;
int fd, ret, size;
BufferedFile *saved_file;
ret = -1;
/* find source file type with extension */
ext = tcc_fileextension(filename);
if (ext[0])
ext++;
/* open the file */
saved_file = file;
file = tcc_open(s1, filename);
if (!file) {
if (flags & AFF_PRINT_ERROR)
error_noabort("file '%s' not found", filename);
goto the_end;
}
if (flags & AFF_PREPROCESS) {
ret = tcc_preprocess(s1);
goto the_end;
}
if (!ext[0] || !PATHCMP(ext, "c")) {
/* C file assumed */
ret = tcc_compile(s1);
goto the_end;
}
#ifdef CONFIG_TCC_ASM
if (!strcmp(ext, "S")) {
/* preprocessed assembler */
ret = tcc_assemble(s1, 1);
goto the_end;
}
if (!strcmp(ext, "s")) {
/* non preprocessed assembler */
ret = tcc_assemble(s1, 0);
goto the_end;
}
#endif
fd = file->fd;
/* assume executable format: auto guess file type */
size = read(fd, &ehdr, sizeof(ehdr));
lseek(fd, 0, SEEK_SET);
if (size <= 0) {
error_noabort("could not read header");
goto the_end;
}
if (size == sizeof(ehdr) &&
ehdr.e_ident[0] == ELFMAG0 &&
ehdr.e_ident[1] == ELFMAG1 &&
ehdr.e_ident[2] == ELFMAG2 &&
ehdr.e_ident[3] == ELFMAG3) {
/* do not display line number if error */
file->line_num = 0;
if (ehdr.e_type == ET_REL) {
ret = tcc_load_object_file(s1, fd, 0);
goto the_end;
}
#ifndef TCC_TARGET_PE
if (ehdr.e_type == ET_DYN) {
if (s1->output_type == TCC_OUTPUT_MEMORY) {
void *h;
h = dlopen(filename, RTLD_GLOBAL | RTLD_LAZY);
if (h)
ret = 0;
} else {
ret = tcc_load_dll(s1, fd, filename,
(flags & AFF_REFERENCED_DLL) != 0);
}
goto the_end;
}
#endif
error_noabort("unrecognized ELF file");
goto the_end;
}
if (memcmp((char *)&ehdr, ARMAG, 8) == 0) {
file->line_num = 0; /* do not display line number if error */
ret = tcc_load_archive(s1, fd);
goto the_end;
}
#ifdef TCC_TARGET_COFF
if (*(uint16_t *)(&ehdr) == COFF_C67_MAGIC) {
ret = tcc_load_coff(s1, fd);
goto the_end;
}
#endif
#ifdef TCC_TARGET_PE
ret = pe_load_file(s1, filename, fd);
#else
/* as GNU ld, consider it is an ld script if not recognized */
ret = tcc_load_ldscript(s1);
#endif
if (ret < 0)
error_noabort("unrecognized file type");
the_end:
if (file)
tcc_close(file);
file = saved_file;
return ret;
}
LIBTCCAPI int tcc_add_file(TCCState *s, const char *filename)
{
if (s->output_type == TCC_OUTPUT_PREPROCESS)
return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR | AFF_PREPROCESS);
else
return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR);
}
LIBTCCAPI int tcc_add_library_path(TCCState *s, const char *pathname)
{
char *pathname1;
pathname1 = tcc_strdup(pathname);
dynarray_add((void ***)&s->library_paths, &s->nb_library_paths, pathname1);
return 0;
}
/* find and load a dll. Return non zero if not found */
/* XXX: add '-rpath' option support ? */
ST_FUNC int tcc_add_dll(TCCState *s, const char *filename, int flags)
{
char buf[1024];
int i;
for(i = 0; i < s->nb_library_paths; i++) {
snprintf(buf, sizeof(buf), "%s/%s",
s->library_paths[i], filename);
if (tcc_add_file_internal(s, buf, flags) == 0)
return 0;
}
return -1;
}
/* the library name is the same as the argument of the '-l' option */
LIBTCCAPI int tcc_add_library(TCCState *s, const char *libraryname)
{
char buf[1024];
int i;
/* first we look for the dynamic library if not static linking */
if (!s->static_link) {
#ifdef TCC_TARGET_PE
if (pe_add_dll(s, libraryname) == 0)
return 0;
#else
snprintf(buf, sizeof(buf), "lib%s.so", libraryname);
if (tcc_add_dll(s, buf, 0) == 0)
return 0;
#endif
}
/* then we look for the static library */
for(i = 0; i < s->nb_library_paths; i++) {
snprintf(buf, sizeof(buf), "%s/lib%s.a",
s->library_paths[i], libraryname);
if (tcc_add_file_internal(s, buf, 0) == 0)
return 0;
}
return -1;
}
LIBTCCAPI int tcc_add_symbol(TCCState *s, const char *name, const 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;
}
LIBTCCAPI int tcc_set_output_type(TCCState *s, int output_type)
{
char buf[1024];
s->output_type = output_type;
if (!s->nostdinc) {
/* default include paths */
/* XXX: reverse order needed if -isystem support */
#ifndef TCC_TARGET_PE
tcc_add_sysinclude_path(s, CONFIG_SYSROOT "/usr/local/include");
tcc_add_sysinclude_path(s, CONFIG_SYSROOT "/usr/include");
#endif
snprintf(buf, sizeof(buf), "%s/include", s->tcc_lib_path);
tcc_add_sysinclude_path(s, buf);
#ifdef TCC_TARGET_PE
snprintf(buf, sizeof(buf), "%s/include/winapi", s->tcc_lib_path);
tcc_add_sysinclude_path(s, buf);
#endif
}
/* if bound checking, then add corresponding sections */
#ifdef CONFIG_TCC_BCHECK
if (s->do_bounds_check) {
/* define symbol */
tcc_define_symbol(s, "__BOUNDS_CHECKING_ON", NULL);
/* create bounds sections */
bounds_section = new_section(s, ".bounds",
SHT_PROGBITS, SHF_ALLOC);
lbounds_section = new_section(s, ".lbounds",
SHT_PROGBITS, SHF_ALLOC);
}
#endif
if (s->char_is_unsigned) {
tcc_define_symbol(s, "__CHAR_UNSIGNED__", NULL);
}
/* add debug sections */
if (s->do_debug) {
/* stab symbols */
stab_section = new_section(s, ".stab", SHT_PROGBITS, 0);
stab_section->sh_entsize = sizeof(Stab_Sym);
stabstr_section = new_section(s, ".stabstr", SHT_STRTAB, 0);
put_elf_str(stabstr_section, "");
stab_section->link = stabstr_section;
/* put first entry */
put_stabs("", 0, 0, 0, 0);
}
/* add libc crt1/crti objects */
#ifndef TCC_TARGET_PE
if ((output_type == TCC_OUTPUT_EXE || output_type == TCC_OUTPUT_DLL) &&
!s->nostdlib) {
if (output_type != TCC_OUTPUT_DLL)
tcc_add_file(s, CONFIG_TCC_CRT_PREFIX "/crt1.o");
tcc_add_file(s, CONFIG_TCC_CRT_PREFIX "/crti.o");
}
#endif
#ifdef TCC_TARGET_PE
snprintf(buf, sizeof(buf), "%s/lib", s->tcc_lib_path);
tcc_add_library_path(s, buf);
#ifdef _WIN32
if (GetSystemDirectory(buf, sizeof buf))
tcc_add_library_path(s, buf);
#endif
#endif
return 0;
}
#define WD_ALL 0x0001 /* warning is activated when using -Wall */
#define FD_INVERT 0x0002 /* invert value before storing */
typedef struct FlagDef {
uint16_t offset;
uint16_t flags;
const char *name;
} FlagDef;
static const FlagDef warning_defs[] = {
{ offsetof(TCCState, warn_unsupported), 0, "unsupported" },
{ offsetof(TCCState, warn_write_strings), 0, "write-strings" },
{ offsetof(TCCState, warn_error), 0, "error" },
{ offsetof(TCCState, warn_implicit_function_declaration), WD_ALL,
"implicit-function-declaration" },
};
ST_FUNC int set_flag(TCCState *s, const FlagDef *flags, int nb_flags,
const char *name, int value)
{
int i;
const FlagDef *p;
const char *r;
r = name;
if (r[0] == 'n' && r[1] == 'o' && r[2] == '-') {
r += 3;
value = !value;
}
for(i = 0, p = flags; i < nb_flags; i++, p++) {
if (!strcmp(r, p->name))
goto found;
}
return -1;
found:
if (p->flags & FD_INVERT)
value = !value;
*(int *)((uint8_t *)s + p->offset) = value;
return 0;
}
/* set/reset a warning */
LIBTCCAPI int tcc_set_warning(TCCState *s, const char *warning_name, int value)
{
int i;
const FlagDef *p;
if (!strcmp(warning_name, "all")) {
for(i = 0, p = warning_defs; i < countof(warning_defs); i++, p++) {
if (p->flags & WD_ALL)
*(int *)((uint8_t *)s + p->offset) = 1;
}
return 0;
} else {
return set_flag(s, warning_defs, countof(warning_defs),
warning_name, value);
}
}
static const FlagDef flag_defs[] = {
{ offsetof(TCCState, char_is_unsigned), 0, "unsigned-char" },
{ offsetof(TCCState, char_is_unsigned), FD_INVERT, "signed-char" },
{ offsetof(TCCState, nocommon), FD_INVERT, "common" },
{ offsetof(TCCState, leading_underscore), 0, "leading-underscore" },
};
/* set/reset a flag */
PUB_FUNC int tcc_set_flag(TCCState *s, const char *flag_name, int value)
{
return set_flag(s, flag_defs, countof(flag_defs),
flag_name, value);
}
PUB_FUNC void tcc_print_stats(TCCState *s, int64_t total_time)
{
double tt;
tt = (double)total_time / 1000000.0;
if (tt < 0.001)
tt = 0.001;
if (total_bytes < 1)
total_bytes = 1;
printf("%d idents, %d lines, %d bytes, %0.3f s, %d lines/s, %0.1f MB/s\n",
tok_ident - TOK_IDENT, total_lines, total_bytes,
tt, (int)(total_lines / tt),
total_bytes / tt / 1000000.0);
}
/* set CONFIG_TCCDIR at runtime */
LIBTCCAPI void tcc_set_lib_path(TCCState *s, const char *path)
{
tcc_free(s->tcc_lib_path);
s->tcc_lib_path = tcc_strdup(path);
}
PUB_FUNC void set_num_callers(int n)
{
#ifdef CONFIG_TCC_BACKTRACE
num_callers = n;
#endif
}
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