Revert all of my changes to directories & codingstyle.

1 files changed, 772 insertions, 0 deletions

diff --git a/tccrun.c b/tccrun.c
new file mode 100644
index 0000000..55db310
--- /dev/null
+++ b/tccrun.c
@@ -0,0 +1,772 @@
+/*
+ *  TCC - Tiny C Compiler - Support for -run switch
+ *
+ *  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"
+
+/* only native compiler supports -run */
+#ifdef TCC_IS_NATIVE
+
+#ifdef CONFIG_TCC_BACKTRACE
+ST_DATA int rt_num_callers = 6;
+ST_DATA const char **rt_bound_error_msg;
+ST_DATA void *rt_prog_main;
+#endif
+
+#ifdef _WIN32
+#define ucontext_t CONTEXT
+#endif
+
+static void set_pages_executable(void *ptr, unsigned long length);
+static void set_exception_handler(void);
+static int rt_get_caller_pc(addr_t *paddr, ucontext_t *uc, int level);
+static void rt_error(ucontext_t *uc, const char *fmt, ...);
+static int tcc_relocate_ex(TCCState *s1, void *ptr);
+
+#ifdef _WIN64
+static void win64_add_function_table(TCCState *s1);
+#endif
+
+/* ------------------------------------------------------------- */
+/* Do all relocations (needed before using tcc_get_symbol())
+   Returns -1 on error. */
+
+LIBTCCAPI int tcc_relocate(TCCState *s1, void *ptr)
+{
+    int ret;
+
+    if (TCC_RELOCATE_AUTO != ptr)
+        return tcc_relocate_ex(s1, ptr);
+
+    ret = tcc_relocate_ex(s1, NULL);
+    if (ret < 0)
+        return ret;
+
+#ifdef HAVE_SELINUX
+    {   /* Use mmap instead of malloc for Selinux.  Ref:
+           http://www.gnu.org/s/libc/manual/html_node/File-Size.html */
+
+        char tmpfname[] = "/tmp/.tccrunXXXXXX";
+        int fd = mkstemp (tmpfname);
+
+        s1->mem_size = ret;
+        unlink (tmpfname);
+        ftruncate (fd, s1->mem_size);
+
+        s1->write_mem = mmap (NULL, ret, PROT_READ|PROT_WRITE,
+            MAP_SHARED, fd, 0);
+        if (s1->write_mem == MAP_FAILED)
+            tcc_error("/tmp not writeable");
+
+        s1->runtime_mem = mmap (NULL, ret, PROT_READ|PROT_EXEC,
+            MAP_SHARED, fd, 0);
+        if (s1->runtime_mem == MAP_FAILED)
+            tcc_error("/tmp not executable");
+
+        ret = tcc_relocate_ex(s1, s1->write_mem);
+    }
+#else
+    s1->runtime_mem = tcc_malloc(ret);
+    ret = tcc_relocate_ex(s1, s1->runtime_mem);
+#endif
+    return ret;
+}
+
+/* launch the compiled program with the given arguments */
+LIBTCCAPI int tcc_run(TCCState *s1, int argc, char **argv)
+{
+    int (*prog_main)(int, char **);
+    int ret;
+
+    if (tcc_relocate(s1, TCC_RELOCATE_AUTO) < 0)
+        return -1;
+
+    prog_main = tcc_get_symbol_err(s1, s1->runtime_main);
+
+#ifdef CONFIG_TCC_BACKTRACE
+    if (s1->do_debug) {
+        set_exception_handler();
+        rt_prog_main = prog_main;
+    }
+#endif
+
+#ifdef CONFIG_TCC_BCHECK
+    if (s1->do_bounds_check) {
+        void (*bound_init)(void);
+        void (*bound_exit)(void);
+        void (*bound_new_region)(void *p, addr_t size);
+        int  (*bound_delete_region)(void *p);
+        int i;
+
+        /* set error function */
+        rt_bound_error_msg = tcc_get_symbol_err(s1, "__bound_error_msg");
+        /* 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_new_region = tcc_get_symbol_err(s1, "__bound_new_region");
+        bound_delete_region = tcc_get_symbol_err(s1, "__bound_delete_region");
+        bound_init();
+        /* mark argv area as valid */
+        bound_new_region(argv, argc*sizeof(argv[0]));
+        for (i=0; i<argc; ++i)
+            bound_new_region(argv[i], strlen(argv[i]));
+
+	errno = 0; /* clean errno value */
+        ret = (*prog_main)(argc, argv);
+
+        /* unmark argv area */
+        for (i=0; i<argc; ++i)
+            bound_delete_region(argv[i]);
+        bound_delete_region(argv);
+
+        bound_exit();
+    } else
+#endif
+    {
+	errno = 0; /* clean errno value */
+        ret = (*prog_main)(argc, argv);
+    }
+    return ret;
+}
+
+/* relocate code. Return -1 on error, required size if ptr is NULL,
+   otherwise copy code into buffer passed by the caller */
+static int tcc_relocate_ex(TCCState *s1, void *ptr)
+{
+    Section *s;
+    unsigned long offset, length;
+    addr_t mem;
+    int i;
+
+    if (NULL == ptr) {
+        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 = (addr_t)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;
+    }
+    offset += 16;
+
+    /* relocate symbols */
+    relocate_syms(s1, 1);
+    if (s1->nb_errors)
+        return -1;
+
+    if (0 == mem)
+        return offset;
+
+    /* relocate each section */
+    for(i = 1; i < s1->nb_sections; i++) {
+        s = s1->sections[i];
+        if (s->reloc)
+            relocate_section(s1, s);
+    }
+    relocate_plt(s1);
+
+    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 %08lx %04x\n", s->name, s->sh_addr, length);
+        ptr = (void*)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);
+    }
+
+#ifdef _WIN64
+    win64_add_function_table(s1);
+#endif
+    return 0;
+}
+
+/* ------------------------------------------------------------- */
+/* allow to run code in memory */
+
+static void set_pages_executable(void *ptr, unsigned long length)
+{
+#ifdef _WIN32
+    unsigned long old_protect;
+    VirtualProtect(ptr, length, PAGE_EXECUTE_READWRITE, &old_protect);
+#else
+    extern void __clear_cache(char *beginning, char *end);
+#ifndef PAGESIZE
+# define PAGESIZE 4096
+#endif
+    addr_t start, end;
+    start = (addr_t)ptr & ~(PAGESIZE - 1);
+    end = (addr_t)ptr + length;
+    end = (end + PAGESIZE - 1) & ~(PAGESIZE - 1);
+    mprotect((void *)start, end - start, PROT_READ | PROT_WRITE | PROT_EXEC);
+    __clear_cache(ptr, ptr + length);
+#endif
+}
+
+/* ------------------------------------------------------------- */
+#ifdef CONFIG_TCC_BACKTRACE
+
+ST_FUNC void tcc_set_num_callers(int n)
+{
+    rt_num_callers = n;
+}
+
+/* print the position in the source file of PC value 'pc' by reading
+   the stabs debug information */
+static addr_t rt_printline(addr_t wanted_pc, const char *msg)
+{
+    char func_name[128], last_func_name[128];
+    addr_t func_addr, last_pc, pc;
+    const char *incl_files[INCLUDE_STACK_SIZE];
+    int incl_index, len, last_line_num, i;
+    const char *str, *p;
+
+    Stab_Sym *stab_sym = NULL, *stab_sym_end, *sym;
+    int stab_len = 0;
+    char *stab_str = NULL;
+
+    if (stab_section) {
+        stab_len = stab_section->data_offset;
+        stab_sym = (Stab_Sym *)stab_section->data;
+        stab_str = (char *) stabstr_section->data;
+    }
+
+    func_name[0] = '\0';
+    func_addr = 0;
+    incl_index = 0;
+    last_func_name[0] = '\0';
+    last_pc = (addr_t)-1;
+    last_line_num = 1;
+
+    if (!stab_sym)
+        goto no_stabs;
+
+    stab_sym_end = (Stab_Sym*)((char*)stab_sym + stab_len);
+    for (sym = stab_sym + 1; sym < stab_sym_end; ++sym) {
+        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 = stab_str + 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 = stab_str + 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 = stab_str + sym->n_strx;
+                /* do not add path */
+                len = strlen(str);
+                if (len > 0 && str[len - 1] != '/')
+                    goto add_incl;
+            }
+            break;
+        }
+    }
+
+no_stabs:
+    /* second pass: we try symtab symbols (no line number info) */
+    incl_index = 0;
+    if (symtab_section)
+    {
+        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 || type == STT_GNU_IFUNC) {
+                if (wanted_pc >= sym->st_value &&
+                    wanted_pc < sym->st_value + sym->st_size) {
+                    pstrcpy(last_func_name, sizeof(last_func_name),
+                            (char *) strtab_section->data + sym->st_name);
+                    func_addr = sym->st_value;
+                    goto found;
+                }
+            }
+        }
+    }
+    /* did not find any info: */
+    fprintf(stderr, "%s %p ???\n", msg, (void*)wanted_pc);
+    fflush(stderr);
+    return 0;
+ found:
+    i = incl_index;
+    if (i > 0)
+        fprintf(stderr, "%s:%d: ", incl_files[--i], last_line_num);
+    fprintf(stderr, "%s %p", msg, (void*)wanted_pc);
+    if (last_func_name[0] != '\0')
+        fprintf(stderr, " %s()", last_func_name);
+    if (--i >= 0) {
+        fprintf(stderr, " (included from ");
+        for (;;) {
+            fprintf(stderr, "%s", incl_files[i]);
+            if (--i < 0)
+                break;
+            fprintf(stderr, ", ");
+        }
+        fprintf(stderr, ")");
+    }
+    fprintf(stderr, "\n");
+    fflush(stderr);
+    return func_addr;
+}
+
+/* emit a run time error at position 'pc' */
+static void rt_error(ucontext_t *uc, const char *fmt, ...)
+{
+    va_list ap;
+    addr_t pc;
+    int i;
+
+    fprintf(stderr, "Runtime error: ");
+    va_start(ap, fmt);
+    vfprintf(stderr, fmt, ap);
+    va_end(ap);
+    fprintf(stderr, "\n");
+
+    for(i=0;i<rt_num_callers;i++) {
+        if (rt_get_caller_pc(&pc, uc, i) < 0)
+            break;
+        pc = rt_printline(pc, i ? "by" : "at");
+        if (pc == (addr_t)rt_prog_main && pc)
+            break;
+    }
+}
+
+/* ------------------------------------------------------------- */
+#ifndef _WIN32
+
+/* signal handler for fatal errors */
+static void sig_error(int signum, siginfo_t *siginf, void *puc)
+{
+    ucontext_t *uc = puc;
+
+    switch(signum) {
+    case SIGFPE:
+        switch(siginf->si_code) {
+        case FPE_INTDIV:
+        case FPE_FLTDIV:
+            rt_error(uc, "division by zero");
+            break;
+        default:
+            rt_error(uc, "floating point exception");
+            break;
+        }
+        break;
+    case SIGBUS:
+    case SIGSEGV:
+        if (rt_bound_error_msg && *rt_bound_error_msg)
+            rt_error(uc, *rt_bound_error_msg);
+        else
+            rt_error(uc, "dereferencing invalid pointer");
+        break;
+    case SIGILL:
+        rt_error(uc, "illegal instruction");
+        break;
+    case SIGABRT:
+        rt_error(uc, "abort() called");
+        break;
+    default:
+        rt_error(uc, "caught signal %d", signum);
+        break;
+    }
+    exit(255);
+}
+
+#ifndef SA_SIGINFO
+# define SA_SIGINFO 0x00000004u
+#endif
+
+/* Generate a stack backtrace when a CPU exception occurs. */
+static void set_exception_handler(void)
+{
+    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);
+}
+
+/* ------------------------------------------------------------- */
+#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 negative if not found */
+static int rt_get_caller_pc(addr_t *paddr, ucontext_t *uc, int level)
+{
+    addr_t fp;
+    int i;
+
+    if (level == 0) {
+#if defined(__APPLE__)
+        *paddr = uc->uc_mcontext->__ss.__eip;
+#elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
+        *paddr = uc->uc_mcontext.mc_eip;
+#elif defined(__dietlibc__)
+        *paddr = uc->uc_mcontext.eip;
+#elif defined(__NetBSD__)
+        *paddr = uc->uc_mcontext.__gregs[_REG_EIP];
+#else
+        *paddr = uc->uc_mcontext.gregs[REG_EIP];
+#endif
+        return 0;
+    } else {
+#if defined(__APPLE__)
+        fp = uc->uc_mcontext->__ss.__ebp;
+#elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
+        fp = uc->uc_mcontext.mc_ebp;
+#elif defined(__dietlibc__)
+        fp = uc->uc_mcontext.ebp;
+#elif defined(__NetBSD__)
+        fp = uc->uc_mcontext.__gregs[_REG_EBP];
+#else
+        fp = uc->uc_mcontext.gregs[REG_EBP];
+#endif
+        for(i=1;i<level;i++) {
+            /* XXX: check address validity with program info */
+            if (fp <= 0x1000 || fp >= 0xc0000000)
+                return -1;
+            fp = ((addr_t *)fp)[0];
+        }
+        *paddr = ((addr_t *)fp)[1];
+        return 0;
+    }
+}
+
+/* ------------------------------------------------------------- */
+#elif defined(__x86_64__)
+
+/* return the PC at frame level 'level'. Return negative if not found */
+static int rt_get_caller_pc(addr_t *paddr, ucontext_t *uc, int level)
+{
+    addr_t fp;
+    int i;
+
+    if (level == 0) {
+        /* XXX: only support linux */
+#if defined(__APPLE__)
+        *paddr = uc->uc_mcontext->__ss.__rip;
+#elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
+        *paddr = uc->uc_mcontext.mc_rip;
+#elif defined(__NetBSD__)
+        *paddr = uc->uc_mcontext.__gregs[_REG_RIP];
+#else
+        *paddr = uc->uc_mcontext.gregs[REG_RIP];
+#endif
+        return 0;
+    } else {
+#if defined(__APPLE__)
+        fp = uc->uc_mcontext->__ss.__rbp;
+#elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
+        fp = uc->uc_mcontext.mc_rbp;
+#elif defined(__NetBSD__)
+        fp = uc->uc_mcontext.__gregs[_REG_RBP];
+#else
+        fp = uc->uc_mcontext.gregs[REG_RBP];
+#endif
+        for(i=1;i<level;i++) {
+            /* XXX: check address validity with program info */
+            if (fp <= 0x1000)
+                return -1;
+            fp = ((addr_t *)fp)[0];
+        }
+        *paddr = ((addr_t *)fp)[1];
+        return 0;
+    }
+}
+
+/* ------------------------------------------------------------- */
+#elif defined(__arm__)
+
+/* return the PC at frame level 'level'. Return negative if not found */
+static int rt_get_caller_pc(addr_t *paddr, ucontext_t *uc, int level)
+{
+    addr_t fp, sp;
+    int i;
+
+    if (level == 0) {
+        /* XXX: only supports linux */
+#if defined(__linux__)
+        *paddr = uc->uc_mcontext.arm_pc;
+#else
+        return -1;
+#endif
+        return 0;
+    } else {
+#if defined(__linux__)
+        fp = uc->uc_mcontext.arm_fp;
+        sp = uc->uc_mcontext.arm_sp;
+        if (sp < 0x1000)
+            sp = 0x1000;
+#else
+        return -1;
+#endif
+        /* XXX: specific to tinycc stack frames */
+        if (fp < sp + 12 || fp & 3)
+            return -1;
+        for(i = 1; i < level; i++) {
+            sp = ((addr_t *)fp)[-2];
+            if (sp < fp || sp - fp > 16 || sp & 3)
+                return -1;
+            fp = ((addr_t *)fp)[-3];
+            if (fp <= sp || fp - sp < 12 || fp & 3)
+                return -1;
+        }
+        /* XXX: check address validity with program info */
+        *paddr = ((addr_t *)fp)[-1];
+        return 0;
+    }
+}
+
+/* ------------------------------------------------------------- */
+#elif defined(__aarch64__)
+
+static int rt_get_caller_pc(addr_t *paddr, ucontext_t *uc, int level)
+{
+    if (level < 0)
+        return -1;
+    else if (level == 0) {
+        *paddr = uc->uc_mcontext.pc;
+        return 0;
+    }
+    else {
+        addr_t *fp = (addr_t *)uc->uc_mcontext.regs[29];
+        int i;
+        for (i = 1; i < level; i++)
+            fp = (addr_t *)fp[0];
+        *paddr = fp[1];
+        return 0;
+    }
+}
+
+/* ------------------------------------------------------------- */
+#else
+
+#warning add arch specific rt_get_caller_pc()
+static int rt_get_caller_pc(addr_t *paddr, ucontext_t *uc, int level)
+{
+    return -1;
+}
+
+#endif /* !__i386__ */
+
+/* ------------------------------------------------------------- */
+#else /* WIN32 */
+
+static long __stdcall cpu_exception_handler(EXCEPTION_POINTERS *ex_info)
+{
+    EXCEPTION_RECORD *er = ex_info->ExceptionRecord;
+    CONTEXT *uc = ex_info->ContextRecord;
+    switch (er->ExceptionCode) {
+    case EXCEPTION_ACCESS_VIOLATION:
+        if (rt_bound_error_msg && *rt_bound_error_msg)
+            rt_error(uc, *rt_bound_error_msg);
+        else
+	    rt_error(uc, "access violation");
+        break;
+    case EXCEPTION_STACK_OVERFLOW:
+        rt_error(uc, "stack overflow");
+        break;
+    case EXCEPTION_INT_DIVIDE_BY_ZERO:
+        rt_error(uc, "division by zero");
+        break;
+    default:
+        rt_error(uc, "exception caught");
+        break;
+    }
+    return EXCEPTION_EXECUTE_HANDLER;
+}
+
+/* Generate a stack backtrace when a CPU exception occurs. */
+static void set_exception_handler(void)
+{
+    SetUnhandledExceptionFilter(cpu_exception_handler);
+}
+
+#ifdef _WIN64
+static void win64_add_function_table(TCCState *s1)
+{
+    RtlAddFunctionTable(
+        (RUNTIME_FUNCTION*)s1->uw_pdata->sh_addr,
+        s1->uw_pdata->data_offset / sizeof (RUNTIME_FUNCTION),
+        text_section->sh_addr
+        );
+}
+#endif
+
+/* return the PC at frame level 'level'. Return non zero if not found */
+static int rt_get_caller_pc(addr_t *paddr, CONTEXT *uc, int level)
+{
+    addr_t fp, pc;
+    int i;
+#ifdef _WIN64
+    pc = uc->Rip;
+    fp = uc->Rbp;
+#else
+    pc = uc->Eip;
+    fp = uc->Ebp;
+#endif
+    if (level > 0) {
+        for(i=1;i<level;i++) {
+	    /* XXX: check address validity with program info */
+	    if (fp <= 0x1000 || fp >= 0xc0000000)
+		return -1;
+	    fp = ((addr_t*)fp)[0];
+	}
+        pc = ((addr_t*)fp)[1];
+    }
+    *paddr = pc;
+    return 0;
+}
+
+#endif /* _WIN32 */
+#endif /* CONFIG_TCC_BACKTRACE */
+/* ------------------------------------------------------------- */
+#ifdef CONFIG_TCC_STATIC
+
+/* dummy function for profiling */
+ST_FUNC void *dlopen(const char *filename, int flag)
+{
+    return NULL;
+}
+
+ST_FUNC void dlclose(void *p)
+{
+}
+
+ST_FUNC const char *dlerror(void)
+{
+    return "error";
+}
+
+typedef struct TCCSyms {
+    char *str;
+    void *ptr;
+} TCCSyms;
+
+
+/* add the symbol you want here if no dynamic linking is done */
+static TCCSyms tcc_syms[] = {
+#if !defined(CONFIG_TCCBOOT)
+#define TCCSYM(a) { #a, &a, },
+    TCCSYM(printf)
+    TCCSYM(fprintf)
+    TCCSYM(fopen)
+    TCCSYM(fclose)
+#undef TCCSYM
+#endif
+    { NULL, NULL },
+};
+
+ST_FUNC 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)
+
+ST_FUNC void *resolve_sym(TCCState *s1, const char *sym)
+{
+    return dlsym(RTLD_DEFAULT, sym);
+}
+
+#endif /* CONFIG_TCC_STATIC */
+#endif /* TCC_IS_NATIVE */
+/* ------------------------------------------------------------- */