added minimal debug info support
This commit is contained in:
bellard
parent
60f781c443
commit
4124f1a1c1
1 changed files with 562 additions and 22 deletions
584
tcc.c
584
tcc.c
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@ -1,7 +1,7 @@
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/*
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* TCC - Tiny C Compiler
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*
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* Copyright (c) 2001 Fabrice Bellard
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* Copyright (c) 2001, 2002 Fabrice Bellard
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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@ -23,7 +23,12 @@
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#include <string.h>
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#include <errno.h>
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#include <math.h>
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#include <unistd.h>
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#include <signal.h>
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#include <sys/ucontext.h>
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#include <sys/mman.h>
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#include <elf.h>
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#include <stab.h>
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#ifndef CONFIG_TCC_STATIC
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#include <dlfcn.h>
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#endif
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@ -109,6 +114,11 @@ typedef struct Section {
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char name[64]; /* section name */
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unsigned char *data; /* section data */
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unsigned char *data_ptr; /* current data pointer */
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int sh_num; /* elf section number */
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int sh_type; /* elf section type */
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int sh_flags; /* elf section flags */
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int sh_entsize; /* elf entry size */
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struct Section *link; /* link to another section */
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struct Section *next;
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} Section;
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@ -148,9 +158,13 @@ CValue tokc, tok1c;
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/* sections */
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Section *first_section;
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int section_num;
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Section *text_section, *data_section, *bss_section; /* predefined sections */
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Section *cur_text_section; /* current section where function code is
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generated */
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Section *bounds_section; /* contains global data bound description */
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/* debug sections */
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Section *stab_section, *stabstr_section, *symtab_section, *strtab_section;
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/* loc : local variable index
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ind : output code index
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@ -163,6 +177,7 @@ int global_expr; /* true if compound literals must be allocated
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globally (used during initializers parsing */
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int func_vt, func_vc; /* current function return type (used by
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return instruction) */
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int last_line_num, last_ind, func_ind; /* debug last line number and pc */
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int tok_ident;
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TokenSym **table_ident;
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TokenSym *hash_ident[TOK_HASH_SIZE];
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@ -178,6 +193,13 @@ IncludeFile include_stack[INCLUDE_STACK_SIZE], *include_stack_ptr;
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int ifdef_stack[IFDEF_STACK_SIZE], *ifdef_stack_ptr;
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char *include_paths[INCLUDE_PATHS_MAX];
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int nb_include_paths;
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int char_pointer_type;
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/* compile with debug symbol (and use them if error during execution) */
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int do_debug = 0;
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/* compile with built-in memory and bounds checker */
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int do_bounds_check = 0;
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/* use GNU C extensions */
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int gnu_ext = 1;
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@ -380,6 +402,7 @@ void decl_initializer(int t, int r, int c, int first, int size_only);
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int decl_initializer_alloc(int t, AttributeDef *ad, int r, int has_init);
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int gv(int rc);
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void move_reg(int r, int s);
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void save_regs(void);
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void save_reg(int r);
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void vpop(void);
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void vswap(void);
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@ -407,10 +430,19 @@ int type_decl(int *v, int t, int td);
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void error(const char *fmt, ...);
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void vpushi(int v);
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void vset(int t, int r, int v);
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void greloc(Sym *s, int addr, int type);
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void type_to_str(char *buf, int buf_size,
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int t, const char *varstr);
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/* section generation */
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void greloc(Sym *s, int addr, int type);
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static int put_elf_str(Section *s, const char *sym);
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static void put_elf_sym(Section *s,
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unsigned long value, unsigned long size,
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int info, int other, int shndx, const char *name);
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static void put_stabs(const char *str, int type, int other, int desc, int value);
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static void put_stabn(int type, int other, int desc, int value);
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static void put_stabd(int type, int other, int desc);
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/* true if float/double/long double type */
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static inline int is_float(int t)
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{
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@ -419,6 +451,8 @@ static inline int is_float(int t)
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return bt == VT_LDOUBLE || bt == VT_DOUBLE || bt == VT_FLOAT;
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}
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#include "bcheck.c"
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#include "i386-gen.c"
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#ifdef CONFIG_TCC_STATIC
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@ -571,7 +605,7 @@ char *pstrcat(char *buf, int buf_size, const char *s)
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return buf;
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}
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Section *new_section(const char *name)
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Section *new_section(const char *name, int sh_type, int sh_flags)
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{
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Section *sec, **psec;
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void *data;
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@ -579,7 +613,12 @@ Section *new_section(const char *name)
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sec = malloc(sizeof(Section));
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if (!sec)
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error("memory full");
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memset(sec, 0, sizeof(Section));
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pstrcpy(sec->name, sizeof(sec->name), name);
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sec->link = NULL;
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sec->sh_num = ++section_num;
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sec->sh_type = sh_type;
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sec->sh_flags = sh_flags;
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data = mmap(NULL, SECTION_VSIZE,
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PROT_EXEC | PROT_READ | PROT_WRITE,
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MAP_PRIVATE | MAP_ANONYMOUS,
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@ -606,7 +645,8 @@ Section *find_section(const char *name)
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if (!strcmp(name, sec->name))
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return sec;
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}
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return new_section(name);
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/* sections are created as PROGBITS */
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return new_section(name, SHT_PROGBITS, SHF_ALLOC);
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}
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/* add a new relocation entry to symbol 's' */
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@ -936,6 +976,10 @@ int handle_eof(void)
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{
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if (include_stack_ptr == include_stack)
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return -1;
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/* add end of include file debug info */
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if (do_debug) {
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put_stabd(N_EINCL, 0, 0);
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}
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/* pop include stack */
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fclose(file);
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free(filename);
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@ -1288,6 +1332,10 @@ void preprocess(void)
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file = f;
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filename = strdup(buf1);
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line_num = 1;
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/* add include file debug info */
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if (do_debug) {
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put_stabs(filename, N_BINCL, 0, 0, 0);
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}
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} else if (tok == TOK_IFNDEF) {
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c = 1;
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goto do_ifdef;
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@ -2831,7 +2879,17 @@ void gen_op(int op)
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/* XXX: cast to int ? (long long case) */
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vpushi(pointed_size(vtop[-1].t));
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gen_op('*');
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gen_opc(op);
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if (do_bounds_check) {
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/* if bounded pointers, we generate a special code to test bounds */
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if (op == '-') {
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vpushi(0);
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vswap();
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gen_op('-');
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}
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gen_bounded_ptr_add();
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} else {
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gen_opc(op);
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}
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/* put again type if gen_opc() swaped operands */
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vtop->t = t1;
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}
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@ -4184,7 +4242,7 @@ void unary(void)
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if (!s)
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error("field not found");
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/* add field offset to pointer */
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vtop->t = VT_INT; /* change type to int */
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vtop->t = char_pointer_type; /* change type to 'char *' */
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vpushi(s->c);
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gen_op('+');
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/* change type to field type, and set to lvalue */
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@ -4524,6 +4582,14 @@ void block(int *bsym, int *csym, int *case_sym, int *def_sym, int case_reg)
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int a, b, c, d;
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Sym *s;
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/* generate line number info */
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if (do_debug &&
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(last_line_num != line_num || last_ind != ind)) {
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put_stabn(N_SLINE, 0, line_num, ind - func_ind);
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last_ind = ind;
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last_line_num = line_num;
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}
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if (tok == TOK_IF) {
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/* if test */
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next();
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@ -5138,6 +5204,17 @@ int decl_initializer_alloc(int t, AttributeDef *ad, int r, int has_init)
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initializers themselves can create new
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initializers */
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data_offset += size;
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/* handles bounds */
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if (do_bounds_check) {
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int *bounds_ptr;
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/* first, we need to add at least one byte between each region */
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data_offset++;
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/* then add global data info */
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bounds_ptr = (int *)bounds_section->data_ptr;
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*bounds_ptr++ = addr;
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*bounds_ptr++ = size;
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bounds_section->data_ptr = (unsigned char *)bounds_ptr;
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}
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sec->data_ptr = (unsigned char *)data_offset;
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}
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if (has_init) {
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@ -5152,6 +5229,28 @@ int decl_initializer_alloc(int t, AttributeDef *ad, int r, int has_init)
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return addr;
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}
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void put_func_debug(int t)
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{
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int bind;
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char buf[512];
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if (t & VT_STATIC)
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bind = STB_LOCAL;
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else
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bind = STB_GLOBAL;
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put_elf_sym(symtab_section, ind, 0,
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ELF32_ST_INFO(bind, STT_FUNC), 0,
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cur_text_section->sh_num, funcname);
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/* stabs info */
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/* XXX: we put here a dummy type */
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snprintf(buf, sizeof(buf), "%s:%c1",
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funcname, t & VT_STATIC ? 'f' : 'F');
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put_stabs(buf, N_FUN, 0, line_num, ind);
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func_ind = ind;
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last_ind = 0;
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last_line_num = 0;
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}
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/* 'l' is VT_LOCAL or VT_CONST to define default storage type */
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void decl(int l)
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{
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@ -5213,6 +5312,9 @@ void decl(int l)
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}
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sym->r = VT_CONST;
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funcname = get_tok_str(v, NULL);
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/* put debug symbol */
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if (do_debug)
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put_func_debug(t);
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/* push a dummy symbol to enable local sym storage */
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sym_push1(&local_stack, 0, 0, 0);
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gfunc_prolog(t);
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@ -5224,6 +5326,10 @@ void decl(int l)
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cur_text_section->data_ptr = (unsigned char *)ind;
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sym_pop(&label_stack, NULL); /* reset label stack */
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sym_pop(&local_stack, NULL); /* reset local stack */
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/* end of function */
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if (do_debug) {
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put_stabn(N_FUN, 0, 0, ind - func_ind);
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}
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funcname = ""; /* for safety */
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func_vt = VT_VOID; /* for safety */
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break;
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@ -5330,7 +5436,8 @@ void resolve_global_syms(void)
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int tcc_compile_file(const char *filename1)
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{
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Sym *define_start;
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char buf[512];
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line_num = 1;
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funcname = "";
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filename = (char *)filename1;
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@ -5343,7 +5450,18 @@ int tcc_compile_file(const char *filename1)
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vtop = vstack - 1;
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anon_sym = SYM_FIRST_ANOM;
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/* file info: full path + filename */
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if (do_debug) {
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getcwd(buf, sizeof(buf));
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pstrcat(buf, sizeof(buf), "/");
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put_stabs(buf, N_SO, 0, 0, (unsigned long)text_section->data_ptr);
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put_stabs(filename, N_SO, 0, 0, (unsigned long)text_section->data_ptr);
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}
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/* define common 'char *' type because it is often used internally
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for arrays and struct dereference */
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char_pointer_type = mk_pointer(VT_BYTE);
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define_start = define_stack.top;
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inp();
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ch = '\n'; /* needed to parse correctly first preprocessor command */
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@ -5353,6 +5471,11 @@ int tcc_compile_file(const char *filename1)
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expect("declaration");
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fclose(file);
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/* end of translation unit info */
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if (do_debug) {
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put_stabn(N_SO, 0, 0, (unsigned long)text_section->data_ptr);
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}
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/* reset define stack, but leave -Dsymbols (may be incorrect if
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they are undefined) */
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sym_pop(&define_stack, define_start);
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@ -5429,6 +5552,17 @@ void open_dll(char *libname)
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error((char *)dlerror());
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}
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static void *resolve_sym(const char *sym)
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{
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void *ptr;
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if (do_bounds_check) {
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ptr = bound_resolve_sym(sym);
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if (ptr)
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return ptr;
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}
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return dlsym(NULL, sym);
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}
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void resolve_extern_syms(void)
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{
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Sym *s, *s1;
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@ -5443,7 +5577,7 @@ void resolve_extern_syms(void)
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and patch it */
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if (s->c) {
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str = get_tok_str(s->v, NULL);
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addr = (int)dlsym(NULL, str);
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addr = (int)resolve_sym(str);
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if (!addr)
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error("unresolved external reference '%s'", str);
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greloc_patch(s, addr);
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@ -5453,25 +5587,403 @@ void resolve_extern_syms(void)
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}
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}
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/* output a binary file (for testing) */
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static int put_elf_str(Section *s, const char *sym)
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{
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int c, offset;
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offset = s->data_ptr - s->data;
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for(;;) {
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c = *sym++;
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*s->data_ptr++ = c;
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if (c == '\0')
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break;
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}
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return offset;
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}
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static void put_elf_sym(Section *s,
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unsigned long value, unsigned long size,
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int info, int other, int shndx, const char *name)
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{
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int name_offset;
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Elf32_Sym *sym;
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sym = (Elf32_Sym *)s->data_ptr;
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if (name)
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name_offset = put_elf_str(s->link, name);
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else
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name_offset = 0;
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sym->st_name = name_offset;
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sym->st_value = value;
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sym->st_size = size;
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sym->st_info = info;
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sym->st_other = other;
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sym->st_shndx = shndx;
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s->data_ptr += sizeof(Elf32_Sym);
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}
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/* put stab debug information */
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typedef struct {
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unsigned long n_strx; /* index into string table of name */
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unsigned char n_type; /* type of symbol */
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unsigned char n_other; /* misc info (usually empty) */
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unsigned short n_desc; /* description field */
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unsigned long n_value; /* value of symbol */
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} Stab_Sym;
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static void put_stabs(const char *str, int type, int other, int desc, int value)
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{
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Stab_Sym *sym;
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sym = (Stab_Sym *)stab_section->data_ptr;
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if (str) {
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sym->n_strx = put_elf_str(stabstr_section, str);
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} else {
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sym->n_strx = 0;
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}
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sym->n_type = type;
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sym->n_other = other;
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sym->n_desc = desc;
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sym->n_value = value;
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stab_section->data_ptr += sizeof(Stab_Sym);
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}
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static void put_stabn(int type, int other, int desc, int value)
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{
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put_stabs(NULL, type, other, desc, value);
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}
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static void put_stabd(int type, int other, int desc)
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{
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put_stabs(NULL, type, other, desc, 0);
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}
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/* output an ELF file (currently, only for testing) */
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void build_exe(char *filename)
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{
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Elf32_Ehdr ehdr;
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FILE *f;
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int shnum, i, phnum, file_offset, offset, size, j;
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Section *sec, *strsec;
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Elf32_Shdr *shdr, *sh;
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Elf32_Phdr *phdr, *ph;
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memset(&ehdr, 0, sizeof(ehdr));
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/* we add a section for symbols */
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strsec = new_section(".shstrtab", SHT_STRTAB, 0);
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put_elf_str(strsec, "");
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/* count number of sections and compute number of program segments */
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shnum = 1; /* section index zero is reserved */
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phnum = 0;
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for(sec = first_section; sec != NULL; sec = sec->next) {
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shnum++;
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if (sec->sh_flags & SHF_ALLOC)
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phnum++;
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}
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/* allocate section headers */
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shdr = malloc(shnum * sizeof(Elf32_Shdr));
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if (!shdr)
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error("memory full");
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memset(shdr, 0, shnum * sizeof(Elf32_Shdr));
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/* allocate program segment headers */
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phdr = malloc(phnum * sizeof(Elf32_Phdr));
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if (!phdr)
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error("memory full");
|
||||
memset(phdr, 0, phnum * sizeof(Elf32_Phdr));
|
||||
|
||||
/* XXX: find correct load order */
|
||||
file_offset = sizeof(Elf32_Ehdr) + phnum * sizeof(Elf32_Phdr);
|
||||
for(sec = first_section, i = 1; sec != NULL; sec = sec->next, i++) {
|
||||
sh = &shdr[i];
|
||||
sh->sh_name = put_elf_str(strsec, sec->name);
|
||||
sh->sh_type = sec->sh_type;
|
||||
sh->sh_flags = sec->sh_flags;
|
||||
sh->sh_entsize = sec->sh_entsize;
|
||||
if (sec->link)
|
||||
sh->sh_link = sec->link->sh_num;
|
||||
if (sh->sh_type == SHT_STRTAB) {
|
||||
sh->sh_addralign = 1;
|
||||
} else if (sh->sh_type == SHT_SYMTAB ||
|
||||
(sh->sh_flags & SHF_ALLOC) == 0) {
|
||||
sh->sh_addralign = 4;
|
||||
} else {
|
||||
sh->sh_addr = (Elf32_Word)sec->data;
|
||||
sh->sh_addralign = 4096;
|
||||
}
|
||||
sh->sh_size = (Elf32_Word)sec->data_ptr - (Elf32_Word)sec->data;
|
||||
/* align to section start */
|
||||
file_offset = (file_offset + sh->sh_addralign - 1) &
|
||||
~(sh->sh_addralign - 1);
|
||||
sh->sh_offset = file_offset;
|
||||
file_offset += sh->sh_size;
|
||||
}
|
||||
/* build program headers (simplistic - not fully correct) */
|
||||
j = 0;
|
||||
for(i=1;i<shnum;i++) {
|
||||
sh = &shdr[i];
|
||||
if (sh->sh_type == SHT_PROGBITS &&
|
||||
(sh->sh_flags & SHF_ALLOC) != 0) {
|
||||
ph = &phdr[j++];
|
||||
ph->p_type = PT_LOAD;
|
||||
ph->p_offset = sh->sh_offset;
|
||||
ph->p_vaddr = sh->sh_addr;
|
||||
ph->p_paddr = ph->p_vaddr;
|
||||
ph->p_filesz = sh->sh_size;
|
||||
ph->p_memsz = sh->sh_size;
|
||||
ph->p_flags = PF_R;
|
||||
if (sh->sh_flags & SHF_WRITE)
|
||||
ph->p_flags |= PF_W;
|
||||
if (sh->sh_flags & SHF_EXECINSTR)
|
||||
ph->p_flags |= PF_X;
|
||||
ph->p_align = sh->sh_addralign;
|
||||
}
|
||||
}
|
||||
|
||||
/* align to 4 */
|
||||
file_offset = (file_offset + 3) & -4;
|
||||
|
||||
/* fill header */
|
||||
ehdr.e_ident[0] = ELFMAG0;
|
||||
ehdr.e_ident[1] = ELFMAG1;
|
||||
ehdr.e_ident[2] = ELFMAG2;
|
||||
ehdr.e_ident[3] = ELFMAG3;
|
||||
ehdr.e_ident[4] = ELFCLASS32;
|
||||
ehdr.e_ident[5] = ELFDATA2LSB;
|
||||
ehdr.e_ident[6] = EV_CURRENT;
|
||||
ehdr.e_type = ET_EXEC;
|
||||
ehdr.e_machine = EM_386;
|
||||
ehdr.e_version = EV_CURRENT;
|
||||
ehdr.e_entry = 0; /* XXX: patch it */
|
||||
ehdr.e_phoff = sizeof(Elf32_Ehdr);
|
||||
ehdr.e_shoff = file_offset;
|
||||
ehdr.e_ehsize = sizeof(Elf32_Ehdr);
|
||||
ehdr.e_phentsize = sizeof(Elf32_Phdr);
|
||||
ehdr.e_phnum = phnum;
|
||||
ehdr.e_shentsize = sizeof(Elf32_Shdr);
|
||||
ehdr.e_shnum = shnum;
|
||||
ehdr.e_shstrndx = shnum - 1;
|
||||
|
||||
/* write elf file */
|
||||
f = fopen(filename, "w");
|
||||
fwrite(text_section->data, 1, text_section->data_ptr - text_section->data, f);
|
||||
if (!f)
|
||||
error("could not write '%s'", filename);
|
||||
fwrite(&ehdr, 1, sizeof(Elf32_Ehdr), f);
|
||||
fwrite(phdr, 1, phnum * sizeof(Elf32_Phdr), f);
|
||||
offset = sizeof(Elf32_Ehdr) + phnum * sizeof(Elf32_Phdr);
|
||||
for(sec = first_section, i = 1; sec != NULL; sec = sec->next, i++) {
|
||||
sh = &shdr[i];
|
||||
while (offset < sh->sh_offset) {
|
||||
fputc(0, f);
|
||||
offset++;
|
||||
}
|
||||
size = sec->data_ptr - sec->data;
|
||||
fwrite(sec->data, 1, size, f);
|
||||
offset += size;
|
||||
}
|
||||
while (offset < ehdr.e_shoff) {
|
||||
fputc(0, f);
|
||||
offset++;
|
||||
}
|
||||
fwrite(shdr, 1, shnum * sizeof(Elf32_Shdr), f);
|
||||
fclose(f);
|
||||
}
|
||||
|
||||
/* print the position in the source file of PC value 'pc' by reading
|
||||
the stabs debug information */
|
||||
static void rt_printline(unsigned long wanted_pc)
|
||||
{
|
||||
Stab_Sym *sym, *sym_end;
|
||||
char 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;
|
||||
|
||||
func_name[0] = '\0';
|
||||
func_addr = 0;
|
||||
incl_index = 0;
|
||||
last_pc = 0xffffffff;
|
||||
last_line_num = 1;
|
||||
sym = (Stab_Sym *)stab_section->data + 1;
|
||||
sym_end = (Stab_Sym *)stab_section->data_ptr;
|
||||
while (sym < sym_end) {
|
||||
switch(sym->n_type) {
|
||||
/* function start or end */
|
||||
case N_FUN:
|
||||
if (sym->n_strx == 0) {
|
||||
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;
|
||||
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++;
|
||||
}
|
||||
/* did not find line number info: */
|
||||
fprintf(stderr, "(no debug info, pc=0x%08lx) ", wanted_pc);
|
||||
return;
|
||||
found:
|
||||
for(i = 0; i < incl_index - 1; i++)
|
||||
fprintf(stderr, "In file included from %s\n",
|
||||
incl_files[i]);
|
||||
if (incl_index > 0) {
|
||||
fprintf(stderr, "%s:%d: ",
|
||||
incl_files[incl_index - 1], last_line_num);
|
||||
}
|
||||
if (func_name[0] != '\0') {
|
||||
fprintf(stderr, "in function '%s()': ", func_name);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/* signal handler for fatal errors */
|
||||
static void sig_error(int signum, siginfo_t *siginf, void *puc)
|
||||
{
|
||||
struct ucontext *uc = puc;
|
||||
unsigned long pc;
|
||||
|
||||
#ifdef __i386__
|
||||
pc = uc->uc_mcontext.gregs[14];
|
||||
#else
|
||||
#error please put the right sigcontext field
|
||||
#endif
|
||||
|
||||
rt_printline(pc);
|
||||
|
||||
switch(signum) {
|
||||
case SIGFPE:
|
||||
switch(siginf->si_code) {
|
||||
case FPE_INTDIV:
|
||||
case FPE_FLTDIV:
|
||||
fprintf(stderr, "division by zero\n");
|
||||
break;
|
||||
default:
|
||||
fprintf(stderr, "floating point exception\n");
|
||||
break;
|
||||
}
|
||||
break;
|
||||
case SIGBUS:
|
||||
case SIGSEGV:
|
||||
fprintf(stderr, "dereferencing invalid pointer\n");
|
||||
break;
|
||||
case SIGILL:
|
||||
fprintf(stderr, "illegal instruction\n");
|
||||
break;
|
||||
case SIGABRT:
|
||||
fprintf(stderr, "abort() called\n");
|
||||
break;
|
||||
default:
|
||||
fprintf(stderr, "signal %d\n", signum);
|
||||
break;
|
||||
}
|
||||
exit(255);
|
||||
}
|
||||
|
||||
/* launch the compiled program with the given arguments */
|
||||
int launch_exe(int argc, char **argv)
|
||||
{
|
||||
Sym *s;
|
||||
int (*t)();
|
||||
struct sigaction sigact;
|
||||
|
||||
s = sym_find1(&extern_stack, TOK_MAIN);
|
||||
if (!s || (s->r & VT_FORWARD))
|
||||
error("main() not defined");
|
||||
|
||||
if (do_debug) {
|
||||
/* install TCC signal handlers to print debug info on fatal
|
||||
runtime errors */
|
||||
sigact.sa_flags = SA_SIGINFO | SA_ONESHOT;
|
||||
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);
|
||||
}
|
||||
|
||||
if (do_bounds_check) {
|
||||
int *p, *p_end;
|
||||
__bound_init();
|
||||
/* add all known static regions */
|
||||
p = (int *)bounds_section->data;
|
||||
p_end = (int *)bounds_section->data_ptr;
|
||||
while (p < p_end) {
|
||||
__bound_new_region((void *)p[0], p[1]);
|
||||
p += 2;
|
||||
}
|
||||
}
|
||||
|
||||
t = (int (*)())s->c;
|
||||
return (*t)(argc, argv);
|
||||
}
|
||||
|
||||
|
||||
void help(void)
|
||||
{
|
||||
printf("tcc version 0.9.3 - Tiny C Compiler - Copyright (C) 2001, 2002 Fabrice Bellard\n"
|
||||
"usage: tcc [-Idir] [-Dsym[=val]] [-Usym] [-llib] [-i infile] infile [infile_args...]\n");
|
||||
"usage: tcc [-Idir] [-Dsym[=val]] [-Usym] [-llib] [-g] [-b]\n"
|
||||
" [-i infile] infile [infile_args...]\n"
|
||||
"\n"
|
||||
"-Idir : add include path 'dir'\n"
|
||||
"-Dsym[=val] : define 'sym' with value 'val'\n"
|
||||
"-Usym : undefine 'sym'\n"
|
||||
"-llib : link with dynamic library 'lib'\n"
|
||||
"-g : generate debug info\n"
|
||||
"-b : compile with built-in memory and bounds checker (implies -g)\n"
|
||||
"-i infile : compile infile\n"
|
||||
);
|
||||
}
|
||||
|
||||
int main(int argc, char **argv)
|
||||
{
|
||||
Sym *s;
|
||||
int (*t)();
|
||||
char *p, *r, *outfile;
|
||||
int optind;
|
||||
|
||||
|
|
@ -5499,9 +6011,10 @@ int main(int argc, char **argv)
|
|||
define_symbol("__TINYC__");
|
||||
|
||||
/* create standard sections */
|
||||
text_section = new_section(".text");
|
||||
data_section = new_section(".data");
|
||||
bss_section = new_section(".bss");
|
||||
text_section = new_section(".text", SHT_PROGBITS, SHF_ALLOC | SHF_EXECINSTR);
|
||||
data_section = new_section(".data", SHT_PROGBITS, SHF_ALLOC | SHF_WRITE);
|
||||
/* XXX: should change type to SHT_NOBITS */
|
||||
bss_section = new_section(".bss", SHT_PROGBITS, SHF_ALLOC | SHF_WRITE);
|
||||
|
||||
optind = 1;
|
||||
outfile = NULL;
|
||||
|
|
@ -5529,6 +6042,37 @@ int main(int argc, char **argv)
|
|||
if (optind >= argc)
|
||||
goto show_help;
|
||||
tcc_compile_file(argv[optind++]);
|
||||
} else if (r[1] == 'b') {
|
||||
if (!do_bounds_check) {
|
||||
do_bounds_check = 1;
|
||||
/* create bounds section for global data */
|
||||
bounds_section = new_section(".bounds",
|
||||
SHT_PROGBITS, SHF_ALLOC);
|
||||
/* debug is implied */
|
||||
goto debug_opt;
|
||||
}
|
||||
} else if (r[1] == 'g') {
|
||||
debug_opt:
|
||||
if (!do_debug) {
|
||||
do_debug = 1;
|
||||
|
||||
/* stab symbols */
|
||||
stab_section = new_section(".stab", SHT_PROGBITS, 0);
|
||||
stab_section->sh_entsize = sizeof(Stab_Sym);
|
||||
stabstr_section = new_section(".stabstr", SHT_STRTAB, 0);
|
||||
put_elf_str(stabstr_section, "");
|
||||
stab_section->link = stabstr_section;
|
||||
/* put first entry */
|
||||
put_stabs("", 0, 0, 0, 0);
|
||||
|
||||
/* elf symbols */
|
||||
symtab_section = new_section(".symtab", SHT_SYMTAB, 0);
|
||||
symtab_section->sh_entsize = sizeof(Elf32_Sym);
|
||||
strtab_section = new_section(".strtab", SHT_STRTAB, 0);
|
||||
put_elf_str(strtab_section, "");
|
||||
symtab_section->link = strtab_section;
|
||||
put_elf_sym(symtab_section, 0, 0, 0, 0, 0, NULL);
|
||||
}
|
||||
} else if (r[1] == 'o') {
|
||||
/* currently, only for testing, so not documented */
|
||||
if (optind >= argc)
|
||||
|
|
@ -5548,10 +6092,6 @@ int main(int argc, char **argv)
|
|||
build_exe(outfile);
|
||||
return 0;
|
||||
} else {
|
||||
s = sym_find1(&extern_stack, TOK_MAIN);
|
||||
if (!s || (s->r & VT_FORWARD))
|
||||
error("main() not defined");
|
||||
t = (int (*)())s->c;
|
||||
return (*t)(argc - optind, argv + optind);
|
||||
return launch_exe(argc - optind, argv + optind);
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in a new issue