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tinycc/libtcc.c
grischka 94bf4d2c22 tccpe: improve dllimport
2009-12-19 22:16:21 +01:00

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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 */
/* display benchmark infos */
int total_lines;
int total_bytes;
/* parser */
static struct BufferedFile *file;
static int ch, tok;
static CValue tokc;
static CString tokcstr; /* current parsed string, if any */
/* additional informations about token */
static int tok_flags;
#define TOK_FLAG_BOL 0x0001 /* beginning of line before */
#define TOK_FLAG_BOF 0x0002 /* beginning of file before */
#define TOK_FLAG_ENDIF 0x0004 /* a endif was found matching starting #ifdef */
#define TOK_FLAG_EOF 0x0008 /* end of file */
static int *macro_ptr, *macro_ptr_allocated;
static int *unget_saved_macro_ptr;
static int unget_saved_buffer[TOK_MAX_SIZE + 1];
static int unget_buffer_enabled;
static int parse_flags;
#define PARSE_FLAG_PREPROCESS 0x0001 /* activate preprocessing */
#define PARSE_FLAG_TOK_NUM 0x0002 /* return numbers instead of TOK_PPNUM */
#define PARSE_FLAG_LINEFEED 0x0004 /* line feed is returned as a
token. line feed is also
returned at eof */
#define PARSE_FLAG_ASM_COMMENTS 0x0008 /* '#' can be used for line comment */
#define PARSE_FLAG_SPACES 0x0010 /* next() returns space tokens (for -E) */
static Section *text_section, *data_section, *bss_section; /* predefined sections */
static Section *cur_text_section; /* current section where function code is
generated */
#ifdef CONFIG_TCC_ASM
static Section *last_text_section; /* to handle .previous asm directive */
#endif
/* bound check related sections */
static Section *bounds_section; /* contains global data bound description */
static Section *lbounds_section; /* contains local data bound description */
/* symbol sections */
static Section *symtab_section, *strtab_section;
/* debug sections */
static Section *stab_section, *stabstr_section;
/* loc : local variable index
ind : output code index
rsym: return symbol
anon_sym: anonymous symbol index
*/
static int rsym, anon_sym, ind, loc;
/* expression generation modifiers */
static int const_wanted; /* true if constant wanted */
static int nocode_wanted; /* true if no code generation wanted for an expression */
static int global_expr; /* true if compound literals must be allocated
globally (used during initializers parsing */
static CType func_vt; /* current function return type (used by return
instruction) */
static int func_vc;
static int last_line_num, last_ind, func_ind; /* debug last line number and pc */
static int tok_ident;
static TokenSym **table_ident;
static TokenSym *hash_ident[TOK_HASH_SIZE];
static char token_buf[STRING_MAX_SIZE + 1];
static char *funcname;
static Sym *global_stack, *local_stack;
static Sym *define_stack;
static Sym *global_label_stack, *local_label_stack;
/* symbol allocator */
#define SYM_POOL_NB (8192 / sizeof(Sym))
static Sym *sym_free_first;
static void **sym_pools;
static int nb_sym_pools;
static SValue vstack[VSTACK_SIZE], *vtop;
/* some predefined types */
static CType char_pointer_type, func_old_type, int_type;
/* use GNU C extensions */
static int gnu_ext = 1;
/* use Tiny C extensions */
static int tcc_ext = 1;
/* max number of callers shown if error */
#ifdef CONFIG_TCC_BACKTRACE
int num_callers = 6;
const char **rt_bound_error_msg;
unsigned long rt_prog_main;
#endif
/* XXX: get rid of this ASAP */
static struct TCCState *tcc_state;
/********************************************************/
/* function prototypes */
/* tccpp.c */
static void next(void);
char *get_tok_str(int v, CValue *cv);
/* tccgen.c */
static void parse_expr_type(CType *type);
static void expr_type(CType *type);
static void unary_type(CType *type);
static void block(int *bsym, int *csym, int *case_sym, int *def_sym,
int case_reg, int is_expr);
static int expr_const(void);
static void expr_eq(void);
static void gexpr(void);
static void gen_inline_functions(void);
static void decl(int l);
static void decl_initializer(CType *type, Section *sec, unsigned long c,
int first, int size_only);
static void decl_initializer_alloc(CType *type, AttributeDef *ad, int r,
int has_init, int v, int scope);
int gv(int rc);
void gv2(int rc1, int rc2);
void move_reg(int r, int s);
void save_regs(int n);
void save_reg(int r);
void vpop(void);
void vswap(void);
void vdup(void);
int get_reg(int rc);
int get_reg_ex(int rc,int rc2);
void gen_op(int op);
void force_charshort_cast(int t);
static void gen_cast(CType *type);
void vstore(void);
static Sym *sym_find(int v);
static Sym *sym_push(int v, CType *type, int r, int c);
/* type handling */
static int type_size(CType *type, int *a);
static inline CType *pointed_type(CType *type);
static int pointed_size(CType *type);
static int lvalue_type(int t);
static int parse_btype(CType *type, AttributeDef *ad);
static void type_decl(CType *type, AttributeDef *ad, int *v, int td);
static int compare_types(CType *type1, CType *type2, int unqualified);
static int is_compatible_types(CType *type1, CType *type2);
static int is_compatible_parameter_types(CType *type1, CType *type2);
int ieee_finite(double d);
void vpushi(int v);
void vpushll(long long v);
void vrott(int n);
void vnrott(int n);
void lexpand_nr(void);
static void vpush_global_sym(CType *type, int v);
void vset(CType *type, int r, int v);
void type_to_str(char *buf, int buf_size,
CType *type, const char *varstr);
static Sym *get_sym_ref(CType *type, Section *sec,
unsigned long offset, unsigned long size);
static Sym *external_global_sym(int v, CType *type, int r);
/* section generation */
static void section_realloc(Section *sec, unsigned long new_size);
static void *section_ptr_add(Section *sec, unsigned long size);
static void put_extern_sym(Sym *sym, Section *section,
unsigned long value, unsigned long size);
static void greloc(Section *s, Sym *sym, unsigned long addr, int type);
static int put_elf_str(Section *s, const char *sym);
static int put_elf_sym(Section *s,
unsigned long value, unsigned long size,
int info, int other, int shndx, const char *name);
static int add_elf_sym(Section *s, uplong value, unsigned long size,
int info, int other, int sh_num, const char *name);
static void put_elf_reloc(Section *symtab, Section *s, unsigned long offset,
int type, int symbol);
static void put_stabs(const char *str, int type, int other, int desc,
unsigned long value);
static void put_stabs_r(const char *str, int type, int other, int desc,
unsigned long value, Section *sec, int sym_index);
static void put_stabn(int type, int other, int desc, int value);
static void put_stabd(int type, int other, int desc);
static int tcc_add_dll(TCCState *s, const char *filename, int flags);
#define AFF_PRINT_ERROR 0x0001 /* print error if file not found */
#define AFF_REFERENCED_DLL 0x0002 /* load a referenced dll from another dll */
#define AFF_PREPROCESS 0x0004 /* preprocess file */
static int tcc_add_file_internal(TCCState *s, const char *filename, int flags);
/* tcccoff.c */
int tcc_output_coff(TCCState *s1, FILE *f);
/* tccpe.c */
int pe_load_file(struct TCCState *s1, const char *filename, int fd);
int pe_output_file(struct TCCState *s1, const char *filename);
int pe_dllimport(int r, SValue *sv, void (*fn)(int r, SValue *sv));
/* tccasm.c */
#ifdef CONFIG_TCC_ASM
static void asm_expr(TCCState *s1, ExprValue *pe);
static int asm_int_expr(TCCState *s1);
static int find_constraint(ASMOperand *operands, int nb_operands,
const char *name, const char **pp);
static int tcc_assemble(TCCState *s1, int do_preprocess);
#endif
static void asm_instr(void);
static void asm_global_instr(void);
/********************************************************/
/* libtcc.c */
static Sym *__sym_malloc(void);
static inline Sym *sym_malloc(void);
static inline void sym_free(Sym *sym);
Section *new_section(TCCState *s1, const char *name, int sh_type, int sh_flags);
static void free_section(Section *s);
static void section_realloc(Section *sec, unsigned long new_size);
static void *section_ptr_add(Section *sec, unsigned long size);
Section *find_section(TCCState *s1, const char *name);
static void put_extern_sym2(
Sym *sym, Section *section,
unsigned long value, unsigned long size, int can_add_underscore);
static void put_extern_sym(
Sym *sym, Section *section,
unsigned long value, unsigned long size);
static void greloc(Section *s, Sym *sym, unsigned long offset, int type);
static void strcat_vprintf(char *buf, int buf_size, const char *fmt, va_list ap);
static void strcat_printf(char *buf, int buf_size, const char *fmt, ...);
/* CString handling */
static void cstr_realloc(CString *cstr, int new_size);
static inline void cstr_ccat(CString *cstr, int ch);
static void cstr_cat(CString *cstr, const char *str);
static void cstr_wccat(CString *cstr, int ch);
static void cstr_new(CString *cstr);
static void cstr_free(CString *cstr);
#define cstr_reset(cstr) cstr_free(cstr)
static void add_char(CString *cstr, int c);
static Sym *sym_push2(Sym **ps, int v, int t, long c);
static Sym *sym_find2(Sym *s, int v);
static inline Sym *struct_find(int v);
static inline Sym *sym_find(int v);
static Sym *sym_push(int v, CType *type, int r, int c);
static Sym *global_identifier_push(int v, int t, int c);
static void sym_pop(Sym **ptop, Sym *b);
BufferedFile *tcc_open(TCCState *s1, const char *filename);
void tcc_close(BufferedFile *bf);
static int tcc_compile(TCCState *s1);
void expect(const char *msg);
void skip(int c);
static void test_lvalue(void);
void *resolve_sym(TCCState *s1, const char *sym);
static inline int isid(int c)
{
return (c >= 'a' && c <= 'z')
|| (c >= 'A' && c <= 'Z')
|| c == '_';
}
static inline int isnum(int c)
{
return c >= '0' && c <= '9';
}
static inline int isoct(int c)
{
return c >= '0' && c <= '7';
}
static inline int toup(int c)
{
if (c >= 'a' && c <= 'z')
return c - 'a' + 'A';
else
return 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
#include "tccpp.c"
#include "tccgen.c"
#ifdef CONFIG_TCC_ASM
#if defined TCC_TARGET_I386 || defined TCC_TARGET_X86_64
#include "i386-asm.c"
#endif
#include "tccasm.c"
#else
static void asm_instr(void)
{
error("inline asm() not supported");
}
static void asm_global_instr(void)
{
error("inline asm() not supported");
}
#endif
#include "tccelf.c"
#ifdef TCC_TARGET_COFF
#include "tcccoff.c"
#endif
#ifdef TCC_TARGET_PE
#include "tccpe.c"
#endif
/********************************************************/
#ifdef _WIN32
char *normalize_slashes(char *path)
{
char *p;
for (p = path; *p; ++p)
if (*p == '\\')
*p = '/';
return path;
}
HMODULE tcc_module;
/* on win32, we suppose the lib and includes are at the location of 'tcc.exe' */
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);
}
#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
/********************************************************/
#ifdef CONFIG_TCC_STATIC
#define RTLD_LAZY 0x001
#define RTLD_NOW 0x002
#define RTLD_GLOBAL 0x100
#define RTLD_DEFAULT NULL
/* dummy function for profiling */
void *dlopen(const char *filename, int flag)
{
return NULL;
}
void dlclose(void *p)
{
}
const char *dlerror(void)
{
return "error";
}
typedef struct TCCSyms {
char *str;
void *ptr;
} TCCSyms;
#define TCCSYM(a) { #a, &a, },
/* add the symbol you want here if no dynamic linking is done */
static TCCSyms tcc_syms[] = {
#if !defined(CONFIG_TCCBOOT)
TCCSYM(printf)
TCCSYM(fprintf)
TCCSYM(fopen)
TCCSYM(fclose)
#endif
{ NULL, NULL },
};
void *resolve_sym(TCCState *s1, const char *symbol)
{
TCCSyms *p;
p = tcc_syms;
while (p->str != NULL) {
if (!strcmp(p->str, symbol))
return p->ptr;
p++;
}
return NULL;
}
#elif defined(_WIN32)
#define dlclose FreeLibrary
#else
#include <dlfcn.h>
void *resolve_sym(TCCState *s1, const char *sym)
{
return dlsym(RTLD_DEFAULT, sym);
}
#endif
/********************************************************/
/* we use our own 'finite' function to avoid potential problems with
non standard math libs */
/* XXX: endianness dependent */
int ieee_finite(double d)
{
int *p = (int *)&d;
return ((unsigned)((p[1] | 0x800fffff) + 1)) >> 31;
}
/* copy a string and truncate it. */
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. */
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 */
char *tcc_basename(const char *name)
{
char *p = strchr(name, 0);
while (p > name && !IS_PATHSEP(p[-1]))
--p;
return p;
}
char *tcc_fileextension (const char *name)
{
char *b = tcc_basename(name);
char *e = strrchr(b, '.');
return e ? e : strchr(b, 0);
}
void set_pages_executable(void *ptr, unsigned long length)
{
#ifdef _WIN32
unsigned long old_protect;
VirtualProtect(ptr, length, PAGE_EXECUTE_READWRITE, &old_protect);
#else
unsigned long start, end;
start = (unsigned long)ptr & ~(PAGESIZE - 1);
end = (unsigned long)ptr + length;
end = (end + PAGESIZE - 1) & ~(PAGESIZE - 1);
mprotect((void *)start, end - start, PROT_READ | PROT_WRITE | PROT_EXEC);
#endif
}
/* memory management */
#ifdef MEM_DEBUG
int mem_cur_size;
int mem_max_size;
unsigned malloc_usable_size(void*);
#endif
void tcc_free(void *ptr)
{
#ifdef MEM_DEBUG
mem_cur_size -= malloc_usable_size(ptr);
#endif
free(ptr);
}
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;
}
void *tcc_mallocz(unsigned long size)
{
void *ptr;
ptr = tcc_malloc(size);
memset(ptr, 0, size);
return ptr;
}
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;
}
char *tcc_strdup(const char *str)
{
char *ptr;
ptr = tcc_malloc(strlen(str) + 1);
strcpy(ptr, str);
return ptr;
}
#define free(p) use_tcc_free(p)
#define malloc(s) use_tcc_malloc(s)
#define realloc(p, s) use_tcc_realloc(p, s)
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;
}
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;
}
/* symbol allocator */
static Sym *__sym_malloc(void)
{
Sym *sym_pool, *sym, *last_sym;
int i;
sym_pool = tcc_malloc(SYM_POOL_NB * sizeof(Sym));
dynarray_add(&sym_pools, &nb_sym_pools, sym_pool);
last_sym = sym_free_first;
sym = sym_pool;
for(i = 0; i < SYM_POOL_NB; i++) {
sym->next = last_sym;
last_sym = sym;
sym++;
}
sym_free_first = last_sym;
return last_sym;
}
static inline Sym *sym_malloc(void)
{
Sym *sym;
sym = sym_free_first;
if (!sym)
sym = __sym_malloc();
sym_free_first = sym->next;
return sym;
}
static inline void sym_free(Sym *sym)
{
sym->next = sym_free_first;
sym_free_first = sym;
}
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 */
static 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. */
static 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;
}
/* return a reference to a section, and create it if it does not
exists */
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' */
static 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;
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;
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)
sym_bind = STB_LOCAL;
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) {
#if 0
/* 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
#ifdef TCC_TARGET_PE
if ((other & 2) && can_add_underscore) {
sprintf(buf1, "_%s@%d", name, FUNC_ARGS(attr));
name = buf1;
} else
#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;
esym->st_other |= other;
}
}
static 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' */
static 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);
}
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++;
}
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 */
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);
}
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);
}
}
void expect(const char *msg)
{
error("%s expected", msg);
}
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);
}
void skip(int c)
{
if (tok != c)
error("'%c' expected", c);
next();
}
static void test_lvalue(void)
{
if (!(vtop->r & VT_LVAL))
expect("lvalue");
}
/* CString handling */
static void cstr_realloc(CString *cstr, int new_size)
{
int size;
void *data;
size = cstr->size_allocated;
if (size == 0)
size = 8; /* no need to allocate a too small first string */
while (size < new_size)
size = size * 2;
data = tcc_realloc(cstr->data_allocated, size);
if (!data)
error("memory full");
cstr->data_allocated = data;
cstr->size_allocated = size;
cstr->data = data;
}
/* add a byte */
static inline void cstr_ccat(CString *cstr, int ch)
{
int size;
size = cstr->size + 1;
if (size > cstr->size_allocated)
cstr_realloc(cstr, size);
((unsigned char *)cstr->data)[size - 1] = ch;
cstr->size = size;
}
static void cstr_cat(CString *cstr, const char *str)
{
int c;
for(;;) {
c = *str;
if (c == '\0')
break;
cstr_ccat(cstr, c);
str++;
}
}
/* add a wide char */
static void cstr_wccat(CString *cstr, int ch)
{
int size;
size = cstr->size + sizeof(nwchar_t);
if (size > cstr->size_allocated)
cstr_realloc(cstr, size);
*(nwchar_t *)(((unsigned char *)cstr->data) + size - sizeof(nwchar_t)) = ch;
cstr->size = size;
}
static void cstr_new(CString *cstr)
{
memset(cstr, 0, sizeof(CString));
}
/* free string and reset it to NULL */
static void cstr_free(CString *cstr)
{
tcc_free(cstr->data_allocated);
cstr_new(cstr);
}
#define cstr_reset(cstr) cstr_free(cstr)
/* XXX: unicode ? */
static void add_char(CString *cstr, int c)
{
if (c == '\'' || c == '\"' || c == '\\') {
/* XXX: could be more precise if char or string */
cstr_ccat(cstr, '\\');
}
if (c >= 32 && c <= 126) {
cstr_ccat(cstr, c);
} else {
cstr_ccat(cstr, '\\');
if (c == '\n') {
cstr_ccat(cstr, 'n');
} else {
cstr_ccat(cstr, '0' + ((c >> 6) & 7));
cstr_ccat(cstr, '0' + ((c >> 3) & 7));
cstr_ccat(cstr, '0' + (c & 7));
}
}
}
/* push, without hashing */
static Sym *sym_push2(Sym **ps, int v, int t, long c)
{
Sym *s;
s = sym_malloc();
s->v = v;
s->type.t = t;
s->type.ref = NULL;
#ifdef _WIN64
s->d = NULL;
#endif
s->c = c;
s->next = NULL;
/* add in stack */
s->prev = *ps;
*ps = s;
return s;
}
/* find a symbol and return its associated structure. 's' is the top
of the symbol stack */
static Sym *sym_find2(Sym *s, int v)
{
while (s) {
if (s->v == v)
return s;
s = s->prev;
}
return NULL;
}
/* structure lookup */
static inline Sym *struct_find(int v)
{
v -= TOK_IDENT;
if ((unsigned)v >= (unsigned)(tok_ident - TOK_IDENT))
return NULL;
return table_ident[v]->sym_struct;
}
/* find an identifier */
static inline Sym *sym_find(int v)
{
v -= TOK_IDENT;
if ((unsigned)v >= (unsigned)(tok_ident - TOK_IDENT))
return NULL;
return table_ident[v]->sym_identifier;
}
/* push a given symbol on the symbol stack */
static Sym *sym_push(int v, CType *type, int r, int c)
{
Sym *s, **ps;
TokenSym *ts;
if (local_stack)
ps = &local_stack;
else
ps = &global_stack;
s = sym_push2(ps, v, type->t, c);
s->type.ref = type->ref;
s->r = r;
/* don't record fields or anonymous symbols */
/* XXX: simplify */
if (!(v & SYM_FIELD) && (v & ~SYM_STRUCT) < SYM_FIRST_ANOM) {
/* record symbol in token array */
ts = table_ident[(v & ~SYM_STRUCT) - TOK_IDENT];
if (v & SYM_STRUCT)
ps = &ts->sym_struct;
else
ps = &ts->sym_identifier;
s->prev_tok = *ps;
*ps = s;
}
return s;
}
/* push a global identifier */
static Sym *global_identifier_push(int v, int t, int c)
{
Sym *s, **ps;
s = sym_push2(&global_stack, v, t, c);
/* don't record anonymous symbol */
if (v < SYM_FIRST_ANOM) {
ps = &table_ident[v - TOK_IDENT]->sym_identifier;
/* modify the top most local identifier, so that
sym_identifier will point to 's' when popped */
while (*ps != NULL)
ps = &(*ps)->prev_tok;
s->prev_tok = NULL;
*ps = s;
}
return s;
}
/* pop symbols until top reaches 'b' */
static void sym_pop(Sym **ptop, Sym *b)
{
Sym *s, *ss, **ps;
TokenSym *ts;
int v;
s = *ptop;
while(s != b) {
ss = s->prev;
v = s->v;
/* remove symbol in token array */
/* XXX: simplify */
if (!(v & SYM_FIELD) && (v & ~SYM_STRUCT) < SYM_FIRST_ANOM) {
ts = table_ident[(v & ~SYM_STRUCT) - TOK_IDENT];
if (v & SYM_STRUCT)
ps = &ts->sym_struct;
else
ps = &ts->sym_identifier;
*ps = s->prev_tok;
}
sym_free(s);
s = ss;
}
*ptop = b;
}
/* I/O layer */
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;
}
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;
}
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 */
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 */
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);
}
#ifdef CONFIG_TCC_BACKTRACE
/* print the position in the source file of PC value 'pc' by reading
the stabs debug information */
static unsigned long rt_printline(unsigned long wanted_pc)
{
Stab_Sym *sym, *sym_end;
char func_name[128], last_func_name[128];
unsigned long func_addr, last_pc, pc;
const char *incl_files[INCLUDE_STACK_SIZE];
int incl_index, len, last_line_num, i;
const char *str, *p;
fprintf(stderr, "0x%08lx:", wanted_pc);
func_name[0] = '\0';
func_addr = 0;
incl_index = 0;
last_func_name[0] = '\0';
last_pc = 0xffffffff;
last_line_num = 1;
sym = (Stab_Sym *)stab_section->data + 1;
sym_end = (Stab_Sym *)(stab_section->data + stab_section->data_offset);
while (sym < sym_end) {
switch(sym->n_type) {
/* function start or end */
case N_FUN:
if (sym->n_strx == 0) {
/* we test if between last line and end of function */
pc = sym->n_value + func_addr;
if (wanted_pc >= last_pc && wanted_pc < pc)
goto found;
func_name[0] = '\0';
func_addr = 0;
} else {
str = stabstr_section->data + sym->n_strx;
p = strchr(str, ':');
if (!p) {
pstrcpy(func_name, sizeof(func_name), str);
} else {
len = p - str;
if (len > sizeof(func_name) - 1)
len = sizeof(func_name) - 1;
memcpy(func_name, str, len);
func_name[len] = '\0';
}
func_addr = sym->n_value;
}
break;
/* line number info */
case N_SLINE:
pc = sym->n_value + func_addr;
if (wanted_pc >= last_pc && wanted_pc < pc)
goto found;
last_pc = pc;
last_line_num = sym->n_desc;
/* XXX: slow! */
strcpy(last_func_name, func_name);
break;
/* include files */
case N_BINCL:
str = stabstr_section->data + sym->n_strx;
add_incl:
if (incl_index < INCLUDE_STACK_SIZE) {
incl_files[incl_index++] = str;
}
break;
case N_EINCL:
if (incl_index > 1)
incl_index--;
break;
case N_SO:
if (sym->n_strx == 0) {
incl_index = 0; /* end of translation unit */
} else {
str = stabstr_section->data + sym->n_strx;
/* do not add path */
len = strlen(str);
if (len > 0 && str[len - 1] != '/')
goto add_incl;
}
break;
}
sym++;
}
/* second pass: we try symtab symbols (no line number info) */
incl_index = 0;
{
ElfW(Sym) *sym, *sym_end;
int type;
sym_end = (ElfW(Sym) *)(symtab_section->data + symtab_section->data_offset);
for(sym = (ElfW(Sym) *)symtab_section->data + 1;
sym < sym_end;
sym++) {
type = ELFW(ST_TYPE)(sym->st_info);
if (type == STT_FUNC) {
if (wanted_pc >= sym->st_value &&
wanted_pc < sym->st_value + sym->st_size) {
pstrcpy(last_func_name, sizeof(last_func_name),
strtab_section->data + sym->st_name);
func_addr = sym->st_value;
goto found;
}
}
}
}
/* did not find any info: */
fprintf(stderr, " ???\n");
return 0;
found:
if (last_func_name[0] != '\0') {
fprintf(stderr, " %s()", last_func_name);
}
if (incl_index > 0) {
fprintf(stderr, " (%s:%d",
incl_files[incl_index - 1], last_line_num);
for(i = incl_index - 2; i >= 0; i--)
fprintf(stderr, ", included from %s", incl_files[i]);
fprintf(stderr, ")");
}
fprintf(stderr, "\n");
return func_addr;
}
#ifdef __i386__
/* fix for glibc 2.1 */
#ifndef REG_EIP
#define REG_EIP EIP
#define REG_EBP EBP
#endif
/* return the PC at frame level 'level'. Return non zero if not found */
static int rt_get_caller_pc(unsigned long *paddr,
ucontext_t *uc, int level)
{
unsigned long fp;
int i;
if (level == 0) {
#if defined(__FreeBSD__)
*paddr = uc->uc_mcontext.mc_eip;
#elif defined(__dietlibc__)
*paddr = uc->uc_mcontext.eip;
#else
*paddr = uc->uc_mcontext.gregs[REG_EIP];
#endif
return 0;
} else {
#if defined(__FreeBSD__)
fp = uc->uc_mcontext.mc_ebp;
#elif defined(__dietlibc__)
fp = uc->uc_mcontext.ebp;
#else
fp = uc->uc_mcontext.gregs[REG_EBP];
#endif
for(i=1;i<level;i++) {
/* XXX: check address validity with program info */
if (fp <= 0x1000 || fp >= 0xc0000000)
return -1;
fp = ((unsigned long *)fp)[0];
}
*paddr = ((unsigned long *)fp)[1];
return 0;
}
}
#elif defined(__x86_64__)
/* return the PC at frame level 'level'. Return non zero if not found */
static int rt_get_caller_pc(unsigned long *paddr,
ucontext_t *uc, int level)
{
unsigned long fp;
int i;
if (level == 0) {
/* XXX: only support linux */
#if defined(__FreeBSD__)
*paddr = uc->uc_mcontext.mc_rip;
#else
*paddr = uc->uc_mcontext.gregs[REG_RIP];
#endif
return 0;
} else {
#if defined(__FreeBSD__)
fp = uc->uc_mcontext.mc_rbp;
#else
fp = uc->uc_mcontext.gregs[REG_RBP];
#endif
for(i=1;i<level;i++) {
/* XXX: check address validity with program info */
if (fp <= 0x1000)
return -1;
fp = ((unsigned long *)fp)[0];
}
*paddr = ((unsigned long *)fp)[1];
return 0;
}
}
#else
#warning add arch specific rt_get_caller_pc()
static int rt_get_caller_pc(unsigned long *paddr,
ucontext_t *uc, int level)
{
return -1;
}
#endif
/* emit a run time error at position 'pc' */
void rt_error(ucontext_t *uc, const char *fmt, ...)
{
va_list ap;
unsigned long pc;
int i;
va_start(ap, fmt);
fprintf(stderr, "Runtime error: ");
vfprintf(stderr, fmt, ap);
fprintf(stderr, "\n");
for(i=0;i<num_callers;i++) {
if (rt_get_caller_pc(&pc, uc, i) < 0)
break;
if (i == 0)
fprintf(stderr, "at ");
else
fprintf(stderr, "by ");
pc = rt_printline(pc);
if (pc == rt_prog_main && pc)
break;
}
exit(255);
va_end(ap);
}
/* signal handler for fatal errors */
static void sig_error(int signum, siginfo_t *siginf, void *puc)
{
ucontext_t *uc = puc;
switch(signum) {
case SIGFPE:
switch(siginf->si_code) {
case FPE_INTDIV:
case FPE_FLTDIV:
rt_error(uc, "division by zero");
break;
default:
rt_error(uc, "floating point exception");
break;
}
break;
case SIGBUS:
case SIGSEGV:
if (rt_bound_error_msg && *rt_bound_error_msg)
rt_error(uc, *rt_bound_error_msg);
else
rt_error(uc, "dereferencing invalid pointer");
break;
case SIGILL:
rt_error(uc, "illegal instruction");
break;
case SIGABRT:
rt_error(uc, "abort() called");
break;
default:
rt_error(uc, "caught signal %d", signum);
break;
}
exit(255);
}
#endif
/* copy code into memory passed in by the caller and do all relocations
(needed before using tcc_get_symbol()).
returns -1 on error and required size if ptr is NULL */
int tcc_relocate(TCCState *s1, void *ptr)
{
Section *s;
unsigned long offset, length;
uplong mem;
int i;
if (0 == s1->runtime_added) {
s1->runtime_added = 1;
s1->nb_errors = 0;
#ifdef TCC_TARGET_PE
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 = (uplong)ptr;
for(i = 1; i < s1->nb_sections; i++) {
s = s1->sections[i];
if (0 == (s->sh_flags & SHF_ALLOC))
continue;
length = s->data_offset;
s->sh_addr = mem ? (mem + offset + 15) & ~15 : 0;
offset = (offset + length + 15) & ~15;
}
/* relocate symbols */
relocate_syms(s1, 1);
if (s1->nb_errors)
return -1;
#ifndef TCC_TARGET_PE
#ifdef TCC_TARGET_X86_64
s1->runtime_plt_and_got_offset = 0;
s1->runtime_plt_and_got = (char *)(mem + offset);
/* double the size of the buffer for got and plt entries
XXX: calculate exact size for them? */
offset *= 2;
#endif
#endif
if (0 == mem)
return offset + 15;
/* relocate each section */
for(i = 1; i < s1->nb_sections; i++) {
s = s1->sections[i];
if (s->reloc)
relocate_section(s1, s);
}
for(i = 1; i < s1->nb_sections; i++) {
s = s1->sections[i];
if (0 == (s->sh_flags & SHF_ALLOC))
continue;
length = s->data_offset;
// printf("%-12s %08x %04x\n", s->name, s->sh_addr, length);
ptr = (void*)(uplong)s->sh_addr;
if (NULL == s->data || s->sh_type == SHT_NOBITS)
memset(ptr, 0, length);
else
memcpy(ptr, s->data, length);
/* mark executable sections as executable in memory */
if (s->sh_flags & SHF_EXECINSTR)
set_pages_executable(ptr, length);
}
#ifndef TCC_TARGET_PE
#ifdef TCC_TARGET_X86_64
set_pages_executable(s1->runtime_plt_and_got,
s1->runtime_plt_and_got_offset);
#endif
#endif
return 0;
}
/* launch the compiled program with the given arguments */
int tcc_run(TCCState *s1, int argc, char **argv)
{
int (*prog_main)(int, char **);
void *ptr;
int ret;
ret = tcc_relocate(s1, NULL);
if (ret < 0)
return -1;
ptr = tcc_malloc(ret);
tcc_relocate(s1, ptr);
prog_main = tcc_get_symbol_err(s1, "main");
if (s1->do_debug) {
#ifdef CONFIG_TCC_BACKTRACE
struct sigaction sigact;
/* install TCC signal handlers to print debug info on fatal
runtime errors */
sigact.sa_flags = SA_SIGINFO | SA_RESETHAND;
sigact.sa_sigaction = sig_error;
sigemptyset(&sigact.sa_mask);
sigaction(SIGFPE, &sigact, NULL);
sigaction(SIGILL, &sigact, NULL);
sigaction(SIGSEGV, &sigact, NULL);
sigaction(SIGBUS, &sigact, NULL);
sigaction(SIGABRT, &sigact, NULL);
#else
error("debug mode not available");
#endif
}
#ifdef CONFIG_TCC_BCHECK
if (s1->do_bounds_check) {
void (*bound_init)(void);
void (*bound_exit)(void);
/* set error function */
rt_bound_error_msg = tcc_get_symbol_err(s1, "__bound_error_msg");
rt_prog_main = (unsigned long)prog_main;
/* XXX: use .init section so that it also work in binary ? */
bound_init = tcc_get_symbol_err(s1, "__bound_init");
bound_exit = tcc_get_symbol_err(s1, "__bound_exit");
bound_init();
ret = (*prog_main)(argc, argv);
bound_exit();
} else
#endif
ret = (*prog_main)(argc, argv);
tcc_free(ptr);
return ret;
}
void tcc_memstats(void)
{
#ifdef MEM_DEBUG
printf("memory in use: %d\n", mem_cur_size);
#endif
}
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;
}
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__", "1");
tcc_define_symbol(s, "__i386", "1");
tcc_define_symbol(s, "i386", "1");
#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__", "1");
tcc_define_symbol(s, "__unix", "1");
tcc_define_symbol(s, "unix", "1");
#if defined(__FreeBSD__)
#define str(s) #s
tcc_define_symbol(s, "__FreeBSD__", str( __FreeBSD__));
tcc_define_symbol(s, "__INTEL_COMPILER", "1");
#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 */
tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long");
tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long");
#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 */
tcc_add_library_path(s, CONFIG_SYSROOT "/usr/local/lib");
tcc_add_library_path(s, CONFIG_SYSROOT "/usr/lib");
tcc_add_library_path(s, CONFIG_SYSROOT "/lib");
#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;
#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;
}
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);
}
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;
}
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;
}
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);
}
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 ? */
static 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 */
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;
}
int tcc_add_symbol(TCCState *s, const char *name, void *val)
{
add_elf_sym(symtab_section, (uplong)val, 0,
ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
SHN_ABS, name);
return 0;
}
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" },
};
static 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 */
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 */
int tcc_set_flag(TCCState *s, const char *flag_name, int value)
{
return set_flag(s, flag_defs, countof(flag_defs),
flag_name, value);
}
/* set CONFIG_TCCDIR at runtime */
void tcc_set_lib_path(TCCState *s, const char *path)
{
tcc_free(s->tcc_lib_path);
s->tcc_lib_path = tcc_strdup(path);
}
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);
}
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