/* * 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); /* 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 #ifdef TCC_TARGET_I386 #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 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 { sym_type = STT_OBJECT; } 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) { if (!sym->c) put_extern_sym(sym, NULL, 0, 0); /* now we can add ELF relocation info */ put_elf_reloc(symtab_section, s, offset, type, sym->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; #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), ""); 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= 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 */ *paddr = uc->uc_mcontext.gregs[REG_RIP]; return 0; } else { fp = uc->uc_mcontext.gregs[REG_RBP]; for(i=1;isi_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__", 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); #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 #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); }