newer version of tcc almost working

1 files changed, 0 insertions, 868 deletions

diff --git a/05/tcc-0.9.25/lib/bcheck.c b/05/tcc-0.9.25/lib/bcheck.c
deleted file mode 100644
index 0ec2a4b..0000000
--- a/05/tcc-0.9.25/lib/bcheck.c
+++ /dev/null
@@ -1,868 +0,0 @@
-/*
- *  Tiny C Memory and bounds checker
- * 
- *  Copyright (c) 2002 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 <stdlib.h>
-#include <stdio.h>
-#include <stdarg.h>
-#include <string.h>
-#if !defined(__FreeBSD__) && !defined(__DragonFly__) && !defined(__OpenBSD__)
-#include <malloc.h>
-#endif
-
-//#define BOUND_DEBUG
-
-/* define so that bound array is static (faster, but use memory if
-   bound checking not used) */
-//#define BOUND_STATIC
-
-/* use malloc hooks. Currently the code cannot be reliable if no hooks */
-#define CONFIG_TCC_MALLOC_HOOKS
-
-#define HAVE_MEMALIGN
-
-#if defined(__FreeBSD__) || defined(__DragonFly__) || defined(__dietlibc__) \
-    || defined(__UCLIBC__) || defined(__OpenBSD__)
-#warning Bound checking not fully supported in this environment.
-#undef CONFIG_TCC_MALLOC_HOOKS
-#undef HAVE_MEMALIGN
-#endif
-
-#define BOUND_T1_BITS 13
-#define BOUND_T2_BITS 11
-#define BOUND_T3_BITS (32 - BOUND_T1_BITS - BOUND_T2_BITS)
-
-#define BOUND_T1_SIZE (1 << BOUND_T1_BITS)
-#define BOUND_T2_SIZE (1 << BOUND_T2_BITS)
-#define BOUND_T3_SIZE (1 << BOUND_T3_BITS)
-#define BOUND_E_BITS  4
-
-#define BOUND_T23_BITS (BOUND_T2_BITS + BOUND_T3_BITS)
-#define BOUND_T23_SIZE (1 << BOUND_T23_BITS)
-
-
-/* this pointer is generated when bound check is incorrect */
-#define INVALID_POINTER ((void *)(-2))
-/* size of an empty region */
-#define EMPTY_SIZE        0xffffffff
-/* size of an invalid region */
-#define INVALID_SIZE      0
-
-typedef struct BoundEntry {
-    unsigned long start;
-    unsigned long size;
-    struct BoundEntry *next;
-    unsigned long is_invalid; /* true if pointers outside region are invalid */
-} BoundEntry;
-
-/* external interface */
-void __bound_init(void);
-void __bound_new_region(void *p, unsigned long size);
-int __bound_delete_region(void *p);
-
-#define FASTCALL __attribute__((regparm(3)))
-
-void *__bound_malloc(size_t size, const void *caller);
-void *__bound_memalign(size_t size, size_t align, const void *caller);
-void __bound_free(void *ptr, const void *caller);
-void *__bound_realloc(void *ptr, size_t size, const void *caller);
-static void *libc_malloc(size_t size);
-static void libc_free(void *ptr);
-static void install_malloc_hooks(void);
-static void restore_malloc_hooks(void);
-
-#ifdef CONFIG_TCC_MALLOC_HOOKS
-static void *saved_malloc_hook;
-static void *saved_free_hook;
-static void *saved_realloc_hook;
-static void *saved_memalign_hook;
-#endif
-
-/* linker definitions */
-extern char _end;
-
-/* TCC definitions */
-extern char __bounds_start; /* start of static bounds table */
-/* error message, just for TCC */
-const char *__bound_error_msg;
-
-/* runtime error output */
-extern void rt_error(unsigned long pc, const char *fmt, ...);
-
-#ifdef BOUND_STATIC
-static BoundEntry *__bound_t1[BOUND_T1_SIZE]; /* page table */
-#else
-static BoundEntry **__bound_t1; /* page table */
-#endif
-static BoundEntry *__bound_empty_t2;   /* empty page, for unused pages */
-static BoundEntry *__bound_invalid_t2; /* invalid page, for invalid pointers */
-
-static BoundEntry *__bound_find_region(BoundEntry *e1, void *p)
-{
-    unsigned long addr, tmp;
-    BoundEntry *e;
-
-    e = e1;
-    while (e != NULL) {
-        addr = (unsigned long)p;
-        addr -= e->start;
-        if (addr <= e->size) {
-            /* put region at the head */
-            tmp = e1->start;
-            e1->start = e->start;
-            e->start = tmp;
-            tmp = e1->size;
-            e1->size = e->size;
-            e->size = tmp;
-            return e1;
-        }
-        e = e->next;
-    }
-    /* no entry found: return empty entry or invalid entry */
-    if (e1->is_invalid)
-        return __bound_invalid_t2;
-    else
-        return __bound_empty_t2;
-}
-
-/* print a bound error message */
-static void bound_error(const char *fmt, ...)
-{
-    __bound_error_msg = fmt;
-    *(int *)0 = 0; /* force a runtime error */
-}
-
-static void bound_alloc_error(void)
-{
-    bound_error("not enough memory for bound checking code");
-}
-
-/* currently, tcc cannot compile that because we use GNUC extensions */
-#if !defined(__TINYC__)
-
-/* return '(p + offset)' for pointer arithmetic (a pointer can reach
-   the end of a region in this case */
-void * FASTCALL __bound_ptr_add(void *p, int offset)
-{
-    unsigned long addr = (unsigned long)p;
-    BoundEntry *e;
-#if defined(BOUND_DEBUG)
-    printf("add: 0x%x %d\n", (int)p, offset);
-#endif
-
-    e = __bound_t1[addr >> (BOUND_T2_BITS + BOUND_T3_BITS)];
-    e = (BoundEntry *)((char *)e + 
-                       ((addr >> (BOUND_T3_BITS - BOUND_E_BITS)) & 
-                        ((BOUND_T2_SIZE - 1) << BOUND_E_BITS)));
-    addr -= e->start;
-    if (addr > e->size) {
-        e = __bound_find_region(e, p);
-        addr = (unsigned long)p - e->start;
-    }
-    addr += offset;
-    if (addr > e->size)
-        return INVALID_POINTER; /* return an invalid pointer */
-    return p + offset;
-}
-
-/* return '(p + offset)' for pointer indirection (the resulting must
-   be strictly inside the region */
-#define BOUND_PTR_INDIR(dsize)                                          \
-void * FASTCALL __bound_ptr_indir ## dsize (void *p, int offset)        \
-{                                                                       \
-    unsigned long addr = (unsigned long)p;                              \
-    BoundEntry *e;                                                      \
-                                                                        \
-    e = __bound_t1[addr >> (BOUND_T2_BITS + BOUND_T3_BITS)];            \
-    e = (BoundEntry *)((char *)e +                                      \
-                       ((addr >> (BOUND_T3_BITS - BOUND_E_BITS)) &      \
-                        ((BOUND_T2_SIZE - 1) << BOUND_E_BITS)));        \
-    addr -= e->start;                                                   \
-    if (addr > e->size) {                                               \
-        e = __bound_find_region(e, p);                                  \
-        addr = (unsigned long)p - e->start;                             \
-    }                                                                   \
-    addr += offset + dsize;                                             \
-    if (addr > e->size)                                                 \
-        return INVALID_POINTER; /* return an invalid pointer */         \
-    return p + offset;                                                  \
-}
-
-#ifdef __i386__
-/* return the frame pointer of the caller */
-#define GET_CALLER_FP(fp)\
-{\
-    unsigned long *fp1;\
-    __asm__ __volatile__ ("movl %%ebp,%0" :"=g" (fp1));\
-    fp = fp1[0];\
-}
-#else
-#error put code to extract the calling frame pointer
-#endif
-
-/* called when entering a function to add all the local regions */
-void FASTCALL __bound_local_new(void *p1) 
-{
-    unsigned long addr, size, fp, *p = p1;
-    GET_CALLER_FP(fp);
-    for(;;) {
-        addr = p[0];
-        if (addr == 0)
-            break;
-        addr += fp;
-        size = p[1];
-        p += 2;
-        __bound_new_region((void *)addr, size);
-    }
-}
-
-/* called when leaving a function to delete all the local regions */
-void FASTCALL __bound_local_delete(void *p1) 
-{
-    unsigned long addr, fp, *p = p1;
-    GET_CALLER_FP(fp);
-    for(;;) {
-        addr = p[0];
-        if (addr == 0)
-            break;
-        addr += fp;
-        p += 2;
-        __bound_delete_region((void *)addr);
-    }
-}
-
-#else
-
-void __bound_local_new(void *p) 
-{
-}
-void __bound_local_delete(void *p) 
-{
-}
-
-void *__bound_ptr_add(void *p, int offset)
-{
-    return p + offset;
-}
-
-#define BOUND_PTR_INDIR(dsize)                               \
-void *__bound_ptr_indir ## dsize (void *p, int offset)       \
-{                                                            \
-    return p + offset;                                       \
-}
-#endif
-
-BOUND_PTR_INDIR(1)
-BOUND_PTR_INDIR(2)
-BOUND_PTR_INDIR(4)
-BOUND_PTR_INDIR(8)
-BOUND_PTR_INDIR(12)
-BOUND_PTR_INDIR(16)
-
-static BoundEntry *__bound_new_page(void)
-{
-    BoundEntry *page;
-    int i;
-
-    page = libc_malloc(sizeof(BoundEntry) * BOUND_T2_SIZE);
-    if (!page)
-        bound_alloc_error();
-    for(i=0;i<BOUND_T2_SIZE;i++) {
-        /* put empty entries */
-        page[i].start = 0;
-        page[i].size = EMPTY_SIZE;
-        page[i].next = NULL;
-        page[i].is_invalid = 0;
-    }
-    return page;
-}
-
-/* currently we use malloc(). Should use bound_new_page() */
-static BoundEntry *bound_new_entry(void)
-{
-    BoundEntry *e;
-    e = libc_malloc(sizeof(BoundEntry));
-    return e;
-}
-
-static void bound_free_entry(BoundEntry *e)
-{
-    libc_free(e);
-}
-
-static inline BoundEntry *get_page(int index)
-{
-    BoundEntry *page;
-    page = __bound_t1[index];
-    if (page == __bound_empty_t2 || page == __bound_invalid_t2) {
-        /* create a new page if necessary */
-        page = __bound_new_page();
-        __bound_t1[index] = page;
-    }
-    return page;
-}
-
-/* mark a region as being invalid (can only be used during init) */
-static void mark_invalid(unsigned long addr, unsigned long size)
-{
-    unsigned long start, end;
-    BoundEntry *page;
-    int t1_start, t1_end, i, j, t2_start, t2_end;
-
-    start = addr;
-    end = addr + size;
-
-    t2_start = (start + BOUND_T3_SIZE - 1) >> BOUND_T3_BITS;
-    if (end != 0)
-        t2_end = end >> BOUND_T3_BITS;
-    else
-        t2_end = 1 << (BOUND_T1_BITS + BOUND_T2_BITS);
-
-#if 0
-    printf("mark_invalid: start = %x %x\n", t2_start, t2_end);
-#endif
-    
-    /* first we handle full pages */
-    t1_start = (t2_start + BOUND_T2_SIZE - 1) >> BOUND_T2_BITS;
-    t1_end = t2_end >> BOUND_T2_BITS;
-
-    i = t2_start & (BOUND_T2_SIZE - 1);
-    j = t2_end & (BOUND_T2_SIZE - 1);
-    
-    if (t1_start == t1_end) {
-        page = get_page(t2_start >> BOUND_T2_BITS);
-        for(; i < j; i++) {
-            page[i].size = INVALID_SIZE;
-            page[i].is_invalid = 1;
-        }
-    } else {
-        if (i > 0) {
-            page = get_page(t2_start >> BOUND_T2_BITS);
-            for(; i < BOUND_T2_SIZE; i++) {
-                page[i].size = INVALID_SIZE;
-                page[i].is_invalid = 1;
-            }
-        }
-        for(i = t1_start; i < t1_end; i++) {
-            __bound_t1[i] = __bound_invalid_t2;
-        }
-        if (j != 0) {
-            page = get_page(t1_end);
-            for(i = 0; i < j; i++) {
-                page[i].size = INVALID_SIZE;
-                page[i].is_invalid = 1;
-            }
-        }
-    }
-}
-
-void __bound_init(void)
-{
-    int i;
-    BoundEntry *page;
-    unsigned long start, size;
-    int *p;
-
-    /* save malloc hooks and install bound check hooks */
-    install_malloc_hooks();
-
-#ifndef BOUND_STATIC
-    __bound_t1 = libc_malloc(BOUND_T1_SIZE * sizeof(BoundEntry *));
-    if (!__bound_t1)
-        bound_alloc_error();
-#endif
-    __bound_empty_t2 = __bound_new_page();
-    for(i=0;i<BOUND_T1_SIZE;i++) {
-        __bound_t1[i] = __bound_empty_t2;
-    }
-
-    page = __bound_new_page();
-    for(i=0;i<BOUND_T2_SIZE;i++) {
-        /* put invalid entries */
-        page[i].start = 0;
-        page[i].size = INVALID_SIZE;
-        page[i].next = NULL;
-        page[i].is_invalid = 1;
-    }
-    __bound_invalid_t2 = page;
-
-    /* invalid pointer zone */
-    start = (unsigned long)INVALID_POINTER & ~(BOUND_T23_SIZE - 1);
-    size = BOUND_T23_SIZE;
-    mark_invalid(start, size);
-
-#if !defined(__TINYC__) && defined(CONFIG_TCC_MALLOC_HOOKS)
-    /* malloc zone is also marked invalid. can only use that with
-       hooks because all libs should use the same malloc. The solution
-       would be to build a new malloc for tcc. */
-    start = (unsigned long)&_end;
-    size = 128 * 0x100000;
-    mark_invalid(start, size);
-#endif
-
-    /* add all static bound check values */
-    p = (int *)&__bounds_start;
-    while (p[0] != 0) {
-        __bound_new_region((void *)p[0], p[1]);
-        p += 2;
-    }
-}
-
-static inline void add_region(BoundEntry *e, 
-                              unsigned long start, unsigned long size)
-{
-    BoundEntry *e1;
-    if (e->start == 0) {
-        /* no region : add it */
-        e->start = start;
-        e->size = size;
-    } else {
-        /* already regions in the list: add it at the head */
-        e1 = bound_new_entry();
-        e1->start = e->start;
-        e1->size = e->size;
-        e1->next = e->next;
-        e->start = start;
-        e->size = size;
-        e->next = e1;
-    }
-}
-
-/* create a new region. It should not already exist in the region list */
-void __bound_new_region(void *p, unsigned long size)
-{
-    unsigned long start, end;
-    BoundEntry *page, *e, *e2;
-    int t1_start, t1_end, i, t2_start, t2_end;
-
-    start = (unsigned long)p;
-    end = start + size;
-    t1_start = start >> (BOUND_T2_BITS + BOUND_T3_BITS);
-    t1_end = end >> (BOUND_T2_BITS + BOUND_T3_BITS);
-
-    /* start */
-    page = get_page(t1_start);
-    t2_start = (start >> (BOUND_T3_BITS - BOUND_E_BITS)) & 
-        ((BOUND_T2_SIZE - 1) << BOUND_E_BITS);
-    t2_end = (end >> (BOUND_T3_BITS - BOUND_E_BITS)) & 
-        ((BOUND_T2_SIZE - 1) << BOUND_E_BITS);
-#ifdef BOUND_DEBUG
-    printf("new %lx %lx %x %x %x %x\n", 
-           start, end, t1_start, t1_end, t2_start, t2_end);
-#endif
-
-    e = (BoundEntry *)((char *)page + t2_start);
-    add_region(e, start, size);
-
-    if (t1_end == t1_start) {
-        /* same ending page */
-        e2 = (BoundEntry *)((char *)page + t2_end);
-        if (e2 > e) {
-            e++;
-            for(;e<e2;e++) {
-                e->start = start;
-                e->size = size;
-            }
-            add_region(e, start, size);
-        }
-    } else {
-        /* mark until end of page */
-        e2 = page + BOUND_T2_SIZE;
-        e++;
-        for(;e<e2;e++) {
-            e->start = start;
-            e->size = size;
-        }
-        /* mark intermediate pages, if any */
-        for(i=t1_start+1;i<t1_end;i++) {
-            page = get_page(i);
-            e2 = page + BOUND_T2_SIZE;
-            for(e=page;e<e2;e++) {
-                e->start = start;
-                e->size = size;
-            }
-        }
-        /* last page */
-        page = get_page(t1_end);
-        e2 = (BoundEntry *)((char *)page + t2_end);
-        for(e=page;e<e2;e++) {
-            e->start = start;
-            e->size = size;
-        }
-        add_region(e, start, size);
-    }
-}
-
-/* delete a region */
-static inline void delete_region(BoundEntry *e, 
-                                 void *p, unsigned long empty_size)
-{
-    unsigned long addr;
-    BoundEntry *e1;
-
-    addr = (unsigned long)p;
-    addr -= e->start;
-    if (addr <= e->size) {
-        /* region found is first one */
-        e1 = e->next;
-        if (e1 == NULL) {
-            /* no more region: mark it empty */
-            e->start = 0;
-            e->size = empty_size;
-        } else {
-            /* copy next region in head */
-            e->start = e1->start;
-            e->size = e1->size;
-            e->next = e1->next;
-            bound_free_entry(e1);
-        }
-    } else {
-        /* find the matching region */
-        for(;;) {
-            e1 = e;
-            e = e->next;
-            /* region not found: do nothing */
-            if (e == NULL)
-                break;
-            addr = (unsigned long)p - e->start;
-            if (addr <= e->size) {
-                /* found: remove entry */
-                e1->next = e->next;
-                bound_free_entry(e);
-                break;
-            }
-        }
-    }
-}
-
-/* WARNING: 'p' must be the starting point of the region. */
-/* return non zero if error */
-int __bound_delete_region(void *p)
-{
-    unsigned long start, end, addr, size, empty_size;
-    BoundEntry *page, *e, *e2;
-    int t1_start, t1_end, t2_start, t2_end, i;
-
-    start = (unsigned long)p;
-    t1_start = start >> (BOUND_T2_BITS + BOUND_T3_BITS);
-    t2_start = (start >> (BOUND_T3_BITS - BOUND_E_BITS)) & 
-        ((BOUND_T2_SIZE - 1) << BOUND_E_BITS);
-    
-    /* find region size */
-    page = __bound_t1[t1_start];
-    e = (BoundEntry *)((char *)page + t2_start);
-    addr = start - e->start;
-    if (addr > e->size)
-        e = __bound_find_region(e, p);
-    /* test if invalid region */
-    if (e->size == EMPTY_SIZE || (unsigned long)p != e->start) 
-        return -1;
-    /* compute the size we put in invalid regions */
-    if (e->is_invalid)
-        empty_size = INVALID_SIZE;
-    else
-        empty_size = EMPTY_SIZE;
-    size = e->size;
-    end = start + size;
-
-    /* now we can free each entry */
-    t1_end = end >> (BOUND_T2_BITS + BOUND_T3_BITS);
-    t2_end = (end >> (BOUND_T3_BITS - BOUND_E_BITS)) & 
-        ((BOUND_T2_SIZE - 1) << BOUND_E_BITS);
-
-    delete_region(e, p, empty_size);
-    if (t1_end == t1_start) {
-        /* same ending page */
-        e2 = (BoundEntry *)((char *)page + t2_end);
-        if (e2 > e) {
-            e++;
-            for(;e<e2;e++) {
-                e->start = 0;
-                e->size = empty_size;
-            }
-            delete_region(e, p, empty_size);
-        }
-    } else {
-        /* mark until end of page */
-        e2 = page + BOUND_T2_SIZE;
-        e++;
-        for(;e<e2;e++) {
-            e->start = 0;
-            e->size = empty_size;
-        }
-        /* mark intermediate pages, if any */
-        /* XXX: should free them */
-        for(i=t1_start+1;i<t1_end;i++) {
-            page = get_page(i);
-            e2 = page + BOUND_T2_SIZE;
-            for(e=page;e<e2;e++) {
-                e->start = 0;
-                e->size = empty_size;
-            }
-        }
-        /* last page */
-        page = get_page(t2_end);
-        e2 = (BoundEntry *)((char *)page + t2_end);
-        for(e=page;e<e2;e++) {
-            e->start = 0;
-            e->size = empty_size;
-        }
-        delete_region(e, p, empty_size);
-    }
-    return 0;
-}
-
-/* return the size of the region starting at p, or EMPTY_SIZE if non
-   existant region. */
-static unsigned long get_region_size(void *p)
-{
-    unsigned long addr = (unsigned long)p;
-    BoundEntry *e;
-
-    e = __bound_t1[addr >> (BOUND_T2_BITS + BOUND_T3_BITS)];
-    e = (BoundEntry *)((char *)e + 
-                       ((addr >> (BOUND_T3_BITS - BOUND_E_BITS)) & 
-                        ((BOUND_T2_SIZE - 1) << BOUND_E_BITS)));
-    addr -= e->start;
-    if (addr > e->size)
-        e = __bound_find_region(e, p);
-    if (e->start != (unsigned long)p)
-        return EMPTY_SIZE;
-    return e->size;
-}
-
-/* patched memory functions */
-
-static void install_malloc_hooks(void)
-{
-#ifdef CONFIG_TCC_MALLOC_HOOKS
-    saved_malloc_hook = __malloc_hook;
-    saved_free_hook = __free_hook;
-    saved_realloc_hook = __realloc_hook;
-    saved_memalign_hook = __memalign_hook;
-    __malloc_hook = __bound_malloc;
-    __free_hook = __bound_free;
-    __realloc_hook = __bound_realloc;
-    __memalign_hook = __bound_memalign;
-#endif
-}
-
-static void restore_malloc_hooks(void)
-{
-#ifdef CONFIG_TCC_MALLOC_HOOKS
-    __malloc_hook = saved_malloc_hook;
-    __free_hook = saved_free_hook;
-    __realloc_hook = saved_realloc_hook;
-    __memalign_hook = saved_memalign_hook;
-#endif
-}
-
-static void *libc_malloc(size_t size)
-{
-    void *ptr;
-    restore_malloc_hooks();
-    ptr = malloc(size);
-    install_malloc_hooks();
-    return ptr;
-}
-
-static void libc_free(void *ptr)
-{
-    restore_malloc_hooks();
-    free(ptr);
-    install_malloc_hooks();
-}
-
-/* XXX: we should use a malloc which ensure that it is unlikely that
-   two malloc'ed data have the same address if 'free' are made in
-   between. */
-void *__bound_malloc(size_t size, const void *caller)
-{
-    void *ptr;
-    
-    /* we allocate one more byte to ensure the regions will be
-       separated by at least one byte. With the glibc malloc, it may
-       be in fact not necessary */
-    ptr = libc_malloc(size + 1);
-    
-    if (!ptr)
-        return NULL;
-    __bound_new_region(ptr, size);
-    return ptr;
-}
-
-void *__bound_memalign(size_t size, size_t align, const void *caller)
-{
-    void *ptr;
-
-    restore_malloc_hooks();
-
-#ifndef HAVE_MEMALIGN
-    if (align > 4) {
-        /* XXX: handle it ? */
-        ptr = NULL;
-    } else {
-        /* we suppose that malloc aligns to at least four bytes */
-        ptr = malloc(size + 1);
-    }
-#else
-    /* we allocate one more byte to ensure the regions will be
-       separated by at least one byte. With the glibc malloc, it may
-       be in fact not necessary */
-    ptr = memalign(size + 1, align);
-#endif
-    
-    install_malloc_hooks();
-    
-    if (!ptr)
-        return NULL;
-    __bound_new_region(ptr, size);
-    return ptr;
-}
-
-void __bound_free(void *ptr, const void *caller)
-{
-    if (ptr == NULL)
-        return;
-    if (__bound_delete_region(ptr) != 0)
-        bound_error("freeing invalid region");
-
-    libc_free(ptr);
-}
-
-void *__bound_realloc(void *ptr, size_t size, const void *caller)
-{
-    void *ptr1;
-    int old_size;
-
-    if (size == 0) {
-        __bound_free(ptr, caller);
-        return NULL;
-    } else {
-        ptr1 = __bound_malloc(size, caller);
-        if (ptr == NULL || ptr1 == NULL)
-            return ptr1;
-        old_size = get_region_size(ptr);
-        if (old_size == EMPTY_SIZE)
-            bound_error("realloc'ing invalid pointer");
-        memcpy(ptr1, ptr, old_size);
-        __bound_free(ptr, caller);
-        return ptr1;
-    }
-}
-
-#ifndef CONFIG_TCC_MALLOC_HOOKS
-void *__bound_calloc(size_t nmemb, size_t size)
-{
-    void *ptr;
-    size = size * nmemb;
-    ptr = __bound_malloc(size, NULL);
-    if (!ptr)
-        return NULL;
-    memset(ptr, 0, size);
-    return ptr;
-}
-#endif
-
-#if 0
-static void bound_dump(void)
-{
-    BoundEntry *page, *e;
-    int i, j;
-
-    printf("region dump:\n");
-    for(i=0;i<BOUND_T1_SIZE;i++) {
-        page = __bound_t1[i];
-        for(j=0;j<BOUND_T2_SIZE;j++) {
-            e = page + j;
-            /* do not print invalid or empty entries */
-            if (e->size != EMPTY_SIZE && e->start != 0) {
-                printf("%08x:", 
-                       (i << (BOUND_T2_BITS + BOUND_T3_BITS)) + 
-                       (j << BOUND_T3_BITS));
-                do {
-                    printf(" %08lx:%08lx", e->start, e->start + e->size);
-                    e = e->next;
-                } while (e != NULL);
-                printf("\n");
-            }
-        }
-    }
-}
-#endif
-
-/* some useful checked functions */
-
-/* check that (p ... p + size - 1) lies inside 'p' region, if any */
-static void __bound_check(const void *p, size_t size)
-{
-    if (size == 0)
-        return;
-    p = __bound_ptr_add((void *)p, size);
-    if (p == INVALID_POINTER)
-        bound_error("invalid pointer");
-}
-
-void *__bound_memcpy(void *dst, const void *src, size_t size)
-{
-    __bound_check(dst, size);
-    __bound_check(src, size);
-    /* check also region overlap */
-    if (src >= dst && src < dst + size)
-        bound_error("overlapping regions in memcpy()");
-    return memcpy(dst, src, size);
-}
-
-void *__bound_memmove(void *dst, const void *src, size_t size)
-{
-    __bound_check(dst, size);
-    __bound_check(src, size);
-    return memmove(dst, src, size);
-}
-
-void *__bound_memset(void *dst, int c, size_t size)
-{
-    __bound_check(dst, size);
-    return memset(dst, c, size);
-}
-
-/* XXX: could be optimized */
-int __bound_strlen(const char *s)
-{
-    const char *p;
-    int len;
-
-    len = 0;
-    for(;;) {
-        p = __bound_ptr_indir1((char *)s, len);
-        if (p == INVALID_POINTER)
-            bound_error("bad pointer in strlen()");
-        if (*p == '\0')
-            break;
-        len++;
-    }
-    return len;
-}
-
-char *__bound_strcpy(char *dst, const char *src)
-{
-    int len;
-    len = __bound_strlen(src);
-    return __bound_memcpy(dst, src, len + 1);
-}
-