[Kernel] move module tolibc/libdl.

1 files changed, 0 insertions, 1289 deletions

diff --git a/src/module.c b/src/module.c
deleted file mode 100644
index 89ab7735bd..0000000000
--- a/src/module.c
+++ /dev/null
@@ -1,1289 +0,0 @@
-/*
- * File      : module.c
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006 - 2012, RT-Thread Development Team
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 2 of the License, or
- *  (at your option) any later version.
- *
- *  This program 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 General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Change Logs:
- * Date           Author       Notes
- * 2010-01-09     Bernard      first version
- * 2010-04-09     yi.qiu       implement based on first version
- * 2010-10-23     yi.qiu       implement module memory allocator
- * 2011-05-25     yi.qiu       implement module hook function
- * 2011-06-23     yi.qiu       rewrite module memory allocator
- * 2012-11-23     Bernard      using RT_DEBUG_LOG instead of rt_kprintf.
- * 2012-11-28     Bernard      remove rt_current_module and user
- *                             can use rt_module_unload to remove a module.
- * 2017-08-20     parai        support intel 386 machine
- */
-
-#include <rthw.h>
-#include <rtthread.h>
-#include <rtm.h>
-
-#ifdef RT_USING_FINSH
-#include <finsh.h>
-#endif
-
-#ifdef RT_USING_MODULE
-#include "module.h"
-
-#define elf_module        ((Elf32_Ehdr *)module_ptr)
-#define shdr              ((Elf32_Shdr *)((rt_uint8_t *)module_ptr + elf_module->e_shoff))
-#define phdr              ((Elf32_Phdr *)((rt_uint8_t *)module_ptr + elf_module->e_phoff))
-
-#define IS_PROG(s)        (s.sh_type == SHT_PROGBITS)
-#define IS_NOPROG(s)      (s.sh_type == SHT_NOBITS)
-#define IS_REL(s)         (s.sh_type == SHT_REL)
-#define IS_RELA(s)        (s.sh_type == SHT_RELA)
-#define IS_ALLOC(s)       (s.sh_flags == SHF_ALLOC)
-#define IS_AX(s)          ((s.sh_flags & SHF_ALLOC) && (s.sh_flags & SHF_EXECINSTR))
-#define IS_AW(s)          ((s.sh_flags & SHF_ALLOC) && (s.sh_flags & SHF_WRITE))
-
-#ifdef RT_USING_MODULE_STKSZ
-#undef RT_USING_MODULE_STKSZ
-#endif
-
-#ifndef RT_USING_MODULE_STKSZ
-#define RT_USING_MODULE_STKSZ (4096 * 2)
-#endif
-
-#ifndef RT_USING_MODULE_PRIO
-#define RT_USING_MODULE_PRIO (RT_THREAD_PRIORITY_MAX - 2)
-#endif
-
-static struct rt_module_symtab *_rt_module_symtab_begin = RT_NULL;
-static struct rt_module_symtab *_rt_module_symtab_end   = RT_NULL;
-
-#if defined(__IAR_SYSTEMS_ICC__) /* for IAR compiler */
-    #pragma section="RTMSymTab"
-#endif
-
-/**
- * @ingroup SystemInit
- *
- * This function will initialize system module
- */
-int rt_system_module_init(void)
-{
-#if defined(__GNUC__) && !defined(__CC_ARM)
-    extern int __rtmsymtab_start;
-    extern int __rtmsymtab_end;
-
-    _rt_module_symtab_begin = (struct rt_module_symtab *)&__rtmsymtab_start;
-    _rt_module_symtab_end   = (struct rt_module_symtab *)&__rtmsymtab_end;
-#elif defined (__CC_ARM)
-    extern int RTMSymTab$$Base;
-    extern int RTMSymTab$$Limit;
-
-    _rt_module_symtab_begin = (struct rt_module_symtab *)&RTMSymTab$$Base;
-    _rt_module_symtab_end   = (struct rt_module_symtab *)&RTMSymTab$$Limit;
-#elif defined (__IAR_SYSTEMS_ICC__)
-    _rt_module_symtab_begin = __section_begin("RTMSymTab");
-    _rt_module_symtab_end   = __section_end("RTMSymTab");
-#endif
-
-    return 0;
-}
-INIT_COMPONENT_EXPORT(rt_system_module_init);
-
-#ifdef RT_USING_FINSH
-void list_symbol(void)
-{
-    /* find in kernel symbol table */
-    struct rt_module_symtab *index;
-
-    for (index = _rt_module_symtab_begin;
-         index != _rt_module_symtab_end;
-         index ++)
-    {
-        rt_kprintf("%s => 0x%08x\n", index->name, index->addr);
-    }
-
-    return ;
-}
-FINSH_FUNCTION_EXPORT(list_symbol, list symbol for module);
-MSH_CMD_EXPORT(list_symbol, list symbol for module);
-#endif
-
-static rt_uint32_t rt_module_symbol_find(const char *sym_str)
-{
-    /* find in kernel symbol table */
-    struct rt_module_symtab *index;
-
-    for (index = _rt_module_symtab_begin;
-         index != _rt_module_symtab_end;
-         index ++)
-    {
-        if (rt_strcmp(index->name, sym_str) == 0)
-            return (rt_uint32_t)index->addr;
-    }
-
-    return 0;
-}
-
-/**
- * This function will return self module object
- *
- * @return the self module object
- */
-rt_module_t rt_module_self(void)
-{
-    rt_thread_t tid;
-
-    tid = rt_thread_self();
-    if (tid == RT_NULL)
-        return RT_NULL;
-
-    /* return current module */
-    return (rt_module_t)tid->module_id;
-}
-RTM_EXPORT(rt_module_self);
-
-static int rt_module_arm_relocate(struct rt_module *module,
-                                  Elf32_Rel        *rel,
-                                  Elf32_Addr        sym_val)
-{
-    Elf32_Addr *where, tmp;
-    Elf32_Sword addend, offset;
-    rt_uint32_t upper, lower, sign, j1, j2;
-
-    where = (Elf32_Addr *)((rt_uint8_t *)module->module_space
-                           + rel->r_offset
-                           - module->vstart_addr);
-    switch (ELF32_R_TYPE(rel->r_info))
-    {
-    case R_ARM_NONE:
-        break;
-    case R_ARM_ABS32:
-        *where += (Elf32_Addr)sym_val;
-        RT_DEBUG_LOG(RT_DEBUG_MODULE, ("R_ARM_ABS32: %x -> %x\n",
-                                       where, *where));
-        break;
-    case R_ARM_PC24:
-    case R_ARM_PLT32:
-    case R_ARM_CALL:
-    case R_ARM_JUMP24:
-        addend = *where & 0x00ffffff;
-        if (addend & 0x00800000)
-            addend |= 0xff000000;
-        tmp = sym_val - (Elf32_Addr)where + (addend << 2);
-        tmp >>= 2;
-        *where = (*where & 0xff000000) | (tmp & 0x00ffffff);
-        RT_DEBUG_LOG(RT_DEBUG_MODULE, ("R_ARM_PC24: %x -> %x\n",
-                                       where, *where));
-        break;
-    case R_ARM_REL32:
-        *where += sym_val - (Elf32_Addr)where;
-        RT_DEBUG_LOG(RT_DEBUG_MODULE,
-                     ("R_ARM_REL32: %x -> %x, sym %x, offset %x\n",
-                      where, *where, sym_val, rel->r_offset));
-        break;
-    case R_ARM_V4BX:
-        *where &= 0xf000000f;
-        *where |= 0x01a0f000;
-        break;
-#ifdef MODULE_USING_386
-    case R_386_GLOB_DAT:
-    case R_386_JUMP_SLOT:
-#endif
-    case R_ARM_GLOB_DAT:
-    case R_ARM_JUMP_SLOT:
-        *where = (Elf32_Addr)sym_val;
-        RT_DEBUG_LOG(RT_DEBUG_MODULE, ("R_ARM_JUMP_SLOT: 0x%x -> 0x%x 0x%x\n",
-                                       where, *where, sym_val));
-        break;
-#if 0        /* To do */
-    case R_ARM_GOT_BREL:
-        temp   = (Elf32_Addr)sym_val;
-        *where = (Elf32_Addr)&temp;
-        RT_DEBUG_LOG(RT_DEBUG_MODULE, ("R_ARM_GOT_BREL: 0x%x -> 0x%x 0x%x\n",
-                                       where, *where, sym_val));
-        break;
-#endif
-#ifdef MODULE_USING_386
-    case R_386_RELATIVE:
-#endif
-    case R_ARM_RELATIVE:
-        *where = (Elf32_Addr)sym_val + *where;
-        RT_DEBUG_LOG(RT_DEBUG_MODULE, ("R_ARM_RELATIVE: 0x%x -> 0x%x 0x%x\n",
-                                       where, *where, sym_val));
-        break;
-    case R_ARM_THM_CALL:
-    case R_ARM_THM_JUMP24:
-        upper  = *(rt_uint16_t *)where;
-        lower  = *(rt_uint16_t *)((Elf32_Addr)where + 2);
-
-        sign   = (upper >> 10) & 1;
-        j1     = (lower >> 13) & 1;
-        j2     = (lower >> 11) & 1;
-        offset = (sign << 24) |
-                 ((~(j1 ^ sign) & 1) << 23) |
-                 ((~(j2 ^ sign) & 1) << 22) |
-                 ((upper & 0x03ff) << 12) |
-                 ((lower & 0x07ff) << 1);
-        if (offset & 0x01000000)
-            offset -= 0x02000000;
-        offset += sym_val - (Elf32_Addr)where;
-
-        if (!(offset & 1) ||
-            offset <= (rt_int32_t)0xff000000 ||
-            offset >= (rt_int32_t)0x01000000)
-        {
-            rt_kprintf("Module: Only Thumb addresses allowed\n");
-
-            return -1;
-        }
-
-        sign = (offset >> 24) & 1;
-        j1   = sign ^ (~(offset >> 23) & 1);
-        j2   = sign ^ (~(offset >> 22) & 1);
-        *(rt_uint16_t *)where = (rt_uint16_t)((upper & 0xf800) |
-                                              (sign << 10) |
-                                              ((offset >> 12) & 0x03ff));
-        *(rt_uint16_t *)(where + 2) = (rt_uint16_t)((lower & 0xd000) |
-                                                    (j1 << 13) | (j2 << 11) |
-                                                    ((offset >> 1) & 0x07ff));
-        upper = *(rt_uint16_t *)where;
-        lower = *(rt_uint16_t *)((Elf32_Addr)where + 2);
-        break;
-    default:
-        return -1;
-    }
-
-    return 0;
-}
-
-#ifdef RT_USING_HOOK
-static void (*rt_module_load_hook)(rt_module_t module);
-static void (*rt_module_unload_hook)(rt_module_t module);
-
-/**
- * @addtogroup Hook
- */
-
-/**@{*/
-
-/**
- * This function will set a hook function, which will be invoked when module
- * be loaded to system.
- *
- * @param hook the hook function
- */
-void rt_module_load_sethook(void (*hook)(rt_module_t module))
-{
-    rt_module_load_hook = hook;
-}
-
-/**
- * This function will set a hook function, which will be invoked when module
- * be unloaded from system.
- *
- * @param hook the hook function
- */
-void rt_module_unload_sethook(void (*hook)(rt_module_t module))
-{
-    rt_module_unload_hook = hook;
-}
-
-/**@}*/
-#endif
-
-static struct rt_module *_load_shared_object(const char *name,
-                                             void       *module_ptr)
-{
-    rt_module_t module = RT_NULL;
-    rt_bool_t linked   = RT_FALSE;
-    rt_uint32_t index, module_size = 0;
-    Elf32_Addr vstart_addr, vend_addr;
-    rt_bool_t has_vstart;
-
-    RT_ASSERT(module_ptr != RT_NULL);
-
-    if (rt_memcmp(elf_module->e_ident, RTMMAG, SELFMAG) == 0)
-    {
-        /* rtmlinker finished */
-        linked = RT_TRUE;
-    }
-
-    /* get the ELF image size */
-    has_vstart = RT_FALSE;
-    vstart_addr = vend_addr = RT_NULL;
-    for (index = 0; index < elf_module->e_phnum; index++)
-    {
-        if (phdr[index].p_type != PT_LOAD)
-            continue;
-
-        RT_DEBUG_LOG(RT_DEBUG_MODULE, ("LOAD segment: %d, 0x%p, 0x%08x\n",
-                                       index, phdr[index].p_vaddr, phdr[index].p_memsz));
-
-        if (phdr[index].p_memsz < phdr[index].p_filesz)
-        {
-            rt_kprintf("invalid elf: segment %d: p_memsz: %d, p_filesz: %d\n",
-                       index, phdr[index].p_memsz, phdr[index].p_filesz);
-            return RT_NULL;
-        }
-        if (!has_vstart)
-        {
-            vstart_addr = phdr[index].p_vaddr;
-            vend_addr = phdr[index].p_vaddr + phdr[index].p_memsz;
-            has_vstart = RT_TRUE;
-            if (vend_addr < vstart_addr)
-            {
-                rt_kprintf("invalid elf: segment %d: p_vaddr: %d, p_memsz: %d\n",
-                           index, phdr[index].p_vaddr, phdr[index].p_memsz);
-                return RT_NULL;
-            }
-        }
-        else
-        {
-            if (phdr[index].p_vaddr < vend_addr)
-            {
-                rt_kprintf("invalid elf: segment should be sorted and not overlapped\n");
-                return RT_NULL;
-            }
-            if (phdr[index].p_vaddr > vend_addr + 16)
-            {
-                /* There should not be too much padding in the object files. */
-                rt_kprintf("warning: too much padding before segment %d\n", index);
-            }
-
-            vend_addr = phdr[index].p_vaddr + phdr[index].p_memsz;
-            if (vend_addr < phdr[index].p_vaddr)
-            {
-                rt_kprintf("invalid elf: "
-                           "segment %d address overflow\n", index);
-                return RT_NULL;
-            }
-        }
-    }
-
-    module_size = vend_addr - vstart_addr;
-
-    RT_DEBUG_LOG(RT_DEBUG_MODULE, ("module size: %d, vstart_addr: 0x%p\n",
-                                   module_size, vstart_addr));
-
-    if (module_size == 0)
-    {
-        rt_kprintf("Module: size error\n");
-
-        return RT_NULL;
-    }
-
-    /* allocate module */
-    module = (struct rt_module *)rt_object_allocate(RT_Object_Class_Module,
-                                                    name);
-    if (!module)
-        return RT_NULL;
-
-    module->vstart_addr = vstart_addr;
-
-    module->nref = 0;
-
-    /* allocate module space */
-    module->module_space = rt_malloc(module_size);
-    if (module->module_space == RT_NULL)
-    {
-        rt_kprintf("Module: allocate space failed.\n");
-        rt_object_delete(&(module->parent));
-
-        return RT_NULL;
-    }
-
-    /* zero all space */
-    rt_memset(module->module_space, 0, module_size);
-
-    for (index = 0; index < elf_module->e_phnum; index++)
-    {
-        if (phdr[index].p_type == PT_LOAD)
-        {
-            rt_memcpy(module->module_space + phdr[index].p_vaddr - vstart_addr,
-                      (rt_uint8_t *)elf_module + phdr[index].p_offset,
-                      phdr[index].p_filesz);
-        }
-    }
-
-    /* set module entry */
-    module->module_entry = module->module_space
-                           + elf_module->e_entry - vstart_addr;
-
-    /* handle relocation section */
-    for (index = 0; index < elf_module->e_shnum; index ++)
-    {
-        rt_uint32_t i, nr_reloc;
-        Elf32_Sym *symtab;
-        Elf32_Rel *rel;
-        rt_uint8_t *strtab;
-        static rt_bool_t unsolved = RT_FALSE;
-
-        if (!IS_REL(shdr[index]))
-            continue;
-
-        /* get relocate item */
-        rel = (Elf32_Rel *)((rt_uint8_t *)module_ptr + shdr[index].sh_offset);
-
-        /* locate .rel.plt and .rel.dyn section */
-        symtab = (Elf32_Sym *)((rt_uint8_t *)module_ptr +
-                               shdr[shdr[index].sh_link].sh_offset);
-        strtab = (rt_uint8_t *)module_ptr +
-                 shdr[shdr[shdr[index].sh_link].sh_link].sh_offset;
-        nr_reloc = (rt_uint32_t)(shdr[index].sh_size / sizeof(Elf32_Rel));
-
-        /* relocate every items */
-        for (i = 0; i < nr_reloc; i ++)
-        {
-            Elf32_Sym *sym = &symtab[ELF32_R_SYM(rel->r_info)];
-
-            RT_DEBUG_LOG(RT_DEBUG_MODULE, ("relocate symbol %s shndx %d\n",
-                                           strtab + sym->st_name,
-                                           sym->st_shndx));
-
-            if ((sym->st_shndx != SHT_NULL) ||
-                (ELF_ST_BIND(sym->st_info) == STB_LOCAL)
-#ifdef MODULE_USING_386
-                || ( (ELF_ST_BIND(sym->st_info) == STB_GLOBAL) && (ELF_ST_TYPE(sym->st_info) == STT_OBJECT) )
-#endif
-               )
-            {
-                rt_module_arm_relocate(module, rel,
-                                       (Elf32_Addr)(module->module_space
-                                                    + sym->st_value
-                                                    - vstart_addr));
-            }
-            else if (!linked)
-            {
-                Elf32_Addr addr;
-
-                RT_DEBUG_LOG(RT_DEBUG_MODULE, ("relocate symbol: %s\n",
-                                               strtab + sym->st_name));
-
-                /* need to resolve symbol in kernel symbol table */
-                addr = rt_module_symbol_find((const char *)(strtab + sym->st_name));
-                if (addr == 0)
-                {
-                    rt_kprintf("Module: can't find %s in kernel symbol table\n",
-                               strtab + sym->st_name);
-                    unsolved = RT_TRUE;
-                }
-                else
-                    rt_module_arm_relocate(module, rel, addr);
-            }
-            rel ++;
-        }
-
-        if (unsolved)
-        {
-            rt_object_delete(&(module->parent));
-
-            return RT_NULL;
-        }
-    }
-
-    /* construct module symbol table */
-    for (index = 0; index < elf_module->e_shnum; index ++)
-    {
-        /* find .dynsym section */
-        rt_uint8_t *shstrab;
-        shstrab = (rt_uint8_t *)module_ptr +
-                  shdr[elf_module->e_shstrndx].sh_offset;
-        if (rt_strcmp((const char *)(shstrab + shdr[index].sh_name), ELF_DYNSYM) == 0)
-            break;
-    }
-
-    /* found .dynsym section */
-    if (index != elf_module->e_shnum)
-    {
-        int i, count = 0;
-        Elf32_Sym  *symtab = RT_NULL;
-        rt_uint8_t *strtab = RT_NULL;
-
-        symtab = (Elf32_Sym *)((rt_uint8_t *)module_ptr + shdr[index].sh_offset);
-        strtab = (rt_uint8_t *)module_ptr + shdr[shdr[index].sh_link].sh_offset;
-
-        for (i = 0; i < shdr[index].sh_size / sizeof(Elf32_Sym); i++)
-        {
-            if ((ELF_ST_BIND(symtab[i].st_info) == STB_GLOBAL) &&
-                (ELF_ST_TYPE(symtab[i].st_info) == STT_FUNC))
-                count ++;
-        }
-
-        module->symtab = (struct rt_module_symtab *)rt_malloc
-                         (count * sizeof(struct rt_module_symtab));
-        module->nsym = count;
-        for (i = 0, count = 0; i < shdr[index].sh_size / sizeof(Elf32_Sym); i++)
-        {
-            rt_size_t length;
-
-            if ((ELF_ST_BIND(symtab[i].st_info) != STB_GLOBAL) ||
-                (ELF_ST_TYPE(symtab[i].st_info) != STT_FUNC))
-                continue;
-
-            length = rt_strlen((const char *)(strtab + symtab[i].st_name)) + 1;
-
-            module->symtab[count].addr =
-                (void *)(module->module_space + symtab[i].st_value - module->vstart_addr);
-            module->symtab[count].name = rt_malloc(length);
-            rt_memset((void *)module->symtab[count].name, 0, length);
-            rt_memcpy((void *)module->symtab[count].name,
-                      strtab + symtab[i].st_name,
-                      length);
-            count ++;
-        }
-    }
-
-    return module;
-}
-
-static struct rt_module* _load_relocated_object(const char *name,
-                                                void       *module_ptr)
-{
-    rt_uint32_t index, rodata_addr = 0, bss_addr = 0, data_addr = 0;
-    rt_uint32_t module_addr = 0, module_size = 0;
-    struct rt_module *module = RT_NULL;
-    rt_uint8_t *ptr, *strtab, *shstrab;
-
-    /* get the ELF image size */
-    for (index = 0; index < elf_module->e_shnum; index ++)
-    {
-        /* text */
-        if (IS_PROG(shdr[index]) && IS_AX(shdr[index]))
-        {
-            module_size += shdr[index].sh_size;
-            module_addr = shdr[index].sh_addr;
-        }
-        /* rodata */
-        if (IS_PROG(shdr[index]) && IS_ALLOC(shdr[index]))
-        {
-            module_size += shdr[index].sh_size;
-        }
-        /* data */
-        if (IS_PROG(shdr[index]) && IS_AW(shdr[index]))
-        {
-            module_size += shdr[index].sh_size;
-        }
-        /* bss */
-        if (IS_NOPROG(shdr[index]) && IS_AW(shdr[index]))
-        {
-            module_size += shdr[index].sh_size;
-        }
-    }
-
-    /* no text, data and bss on image */
-    if (module_size == 0)
-        return RT_NULL;
-
-    /* allocate module */
-    module = (struct rt_module *)
-             rt_object_allocate(RT_Object_Class_Module, (const char *)name);
-    if (module == RT_NULL)
-        return RT_NULL;
-
-    module->vstart_addr = 0;
-
-    /* allocate module space */
-    module->module_space = rt_malloc(module_size);
-    if (module->module_space == RT_NULL)
-    {
-        rt_kprintf("Module: allocate space failed.\n");
-        rt_object_delete(&(module->parent));
-
-        return RT_NULL;
-    }
-
-    /* zero all space */
-    ptr = module->module_space;
-    rt_memset(ptr, 0, module_size);
-
-    /* load text and data section */
-    for (index = 0; index < elf_module->e_shnum; index ++)
-    {
-        /* load text section */
-        if (IS_PROG(shdr[index]) && IS_AX(shdr[index]))
-        {
-            rt_memcpy(ptr,
-                      (rt_uint8_t *)elf_module + shdr[index].sh_offset,
-                      shdr[index].sh_size);
-            RT_DEBUG_LOG(RT_DEBUG_MODULE, ("load text 0x%x, size %d\n",
-                                           ptr, shdr[index].sh_size));
-            ptr += shdr[index].sh_size;
-        }
-
-        /* load rodata section */
-        if (IS_PROG(shdr[index]) && IS_ALLOC(shdr[index]))
-        {
-            rt_memcpy(ptr,
-                      (rt_uint8_t *)elf_module + shdr[index].sh_offset,
-                      shdr[index].sh_size);
-            rodata_addr = (rt_uint32_t)ptr;
-            RT_DEBUG_LOG(RT_DEBUG_MODULE,
-                         ("load rodata 0x%x, size %d, rodata 0x%x\n",
-                          ptr, shdr[index].sh_size, *(rt_uint32_t *)data_addr));
-            ptr += shdr[index].sh_size;
-        }
-
-        /* load data section */
-        if (IS_PROG(shdr[index]) && IS_AW(shdr[index]))
-        {
-            rt_memcpy(ptr,
-                      (rt_uint8_t *)elf_module + shdr[index].sh_offset,
-                      shdr[index].sh_size);
-            data_addr = (rt_uint32_t)ptr;
-            RT_DEBUG_LOG(RT_DEBUG_MODULE,
-                         ("load data 0x%x, size %d, data 0x%x\n",
-                          ptr, shdr[index].sh_size, *(rt_uint32_t *)data_addr));
-            ptr += shdr[index].sh_size;
-        }
-
-        /* load bss section */
-        if (IS_NOPROG(shdr[index]) && IS_AW(shdr[index]))
-        {
-            rt_memset(ptr, 0, shdr[index].sh_size);
-            bss_addr = (rt_uint32_t)ptr;
-            RT_DEBUG_LOG(RT_DEBUG_MODULE, ("load bss 0x%x, size %d,\n",
-                                           ptr, shdr[index].sh_size));
-        }
-    }
-
-    /* set module entry */
-    module->module_entry =
-        (rt_uint8_t *)module->module_space + elf_module->e_entry - module_addr;
-
-    /* handle relocation section */
-    for (index = 0; index < elf_module->e_shnum; index ++)
-    {
-        rt_uint32_t i, nr_reloc;
-        Elf32_Sym *symtab;
-        Elf32_Rel *rel;
-
-        if (!IS_REL(shdr[index]))
-            continue;
-
-        /* get relocate item */
-        rel = (Elf32_Rel *)((rt_uint8_t *)module_ptr + shdr[index].sh_offset);
-
-        /* locate .dynsym and .dynstr */
-        symtab   = (Elf32_Sym *)((rt_uint8_t *)module_ptr +
-                                 shdr[shdr[index].sh_link].sh_offset);
-        strtab   = (rt_uint8_t *)module_ptr +
-                   shdr[shdr[shdr[index].sh_link].sh_link].sh_offset;
-        shstrab  = (rt_uint8_t *)module_ptr +
-                   shdr[elf_module->e_shstrndx].sh_offset;
-        nr_reloc = (rt_uint32_t)(shdr[index].sh_size / sizeof(Elf32_Rel));
-
-        /* relocate every items */
-        for (i = 0; i < nr_reloc; i ++)
-        {
-            Elf32_Sym *sym = &symtab[ELF32_R_SYM(rel->r_info)];
-
-            RT_DEBUG_LOG(RT_DEBUG_MODULE, ("relocate symbol: %s\n",
-                                           strtab + sym->st_name));
-
-            if (sym->st_shndx != STN_UNDEF)
-            {
-                if ((ELF_ST_TYPE(sym->st_info) == STT_SECTION) ||
-                    (ELF_ST_TYPE(sym->st_info) == STT_OBJECT))
-                {
-                    if (rt_strncmp((const char *)(shstrab +
-                                                  shdr[sym->st_shndx].sh_name), ELF_RODATA, 8) == 0)
-                    {
-                        /* relocate rodata section */
-                        RT_DEBUG_LOG(RT_DEBUG_MODULE, ("rodata\n"));
-                        rt_module_arm_relocate(module, rel,
-                                               (Elf32_Addr)(rodata_addr + sym->st_value));
-                    }
-                    else if (rt_strncmp((const char *)
-                                        (shstrab + shdr[sym->st_shndx].sh_name), ELF_BSS, 5) == 0)
-                    {
-                        /* relocate bss section */
-                        RT_DEBUG_LOG(RT_DEBUG_MODULE, ("bss\n"));
-                        rt_module_arm_relocate(module, rel,
-                                               (Elf32_Addr)bss_addr + sym->st_value);
-                    }
-                    else if (rt_strncmp((const char *)(shstrab + shdr[sym->st_shndx].sh_name),
-                                        ELF_DATA, 6) == 0)
-                    {
-                        /* relocate data section */
-                        RT_DEBUG_LOG(RT_DEBUG_MODULE, ("data\n"));
-                        rt_module_arm_relocate(module, rel,
-                                               (Elf32_Addr)data_addr + sym->st_value);
-                    }
-                }
-                else if (ELF_ST_TYPE(sym->st_info) == STT_FUNC)
-                {
-                    /* relocate function */
-                    rt_module_arm_relocate(module, rel,
-                                           (Elf32_Addr)((rt_uint8_t *)
-                                                        module->module_space
-                                                        - module_addr
-                                                        + sym->st_value));
-                }
-            }
-            else if (ELF_ST_TYPE(sym->st_info) == STT_FUNC)
-            {
-                /* relocate function */
-                rt_module_arm_relocate(module, rel,
-                                       (Elf32_Addr)((rt_uint8_t *)
-                                                    module->module_space
-                                                    - module_addr
-                                                    + sym->st_value));
-            }
-            else
-            {
-                Elf32_Addr addr;
-
-                if (ELF32_R_TYPE(rel->r_info) != R_ARM_V4BX)
-                {
-                    RT_DEBUG_LOG(RT_DEBUG_MODULE, ("relocate symbol: %s\n",
-                                                   strtab + sym->st_name));
-
-                    /* need to resolve symbol in kernel symbol table */
-                    addr = rt_module_symbol_find((const char *)(strtab + sym->st_name));
-                    if (addr != (Elf32_Addr)RT_NULL)
-                    {
-                        rt_module_arm_relocate(module, rel, addr);
-                        RT_DEBUG_LOG(RT_DEBUG_MODULE, ("symbol addr 0x%x\n",
-                                                       addr));
-                    }
-                    else
-                        rt_kprintf("Module: can't find %s in kernel symbol table\n",
-                                   strtab + sym->st_name);
-                }
-                else
-                {
-                    rt_module_arm_relocate(module, rel,
-                                           (Elf32_Addr)((rt_uint8_t *)
-                                                        module->module_space
-                                                        - module_addr
-                                                        + sym->st_value));
-                }
-            }
-            rel ++;
-        }
-    }
-
-    return module;
-}
-
-#define RT_MODULE_ARG_MAX    8
-static int _rt_module_split_arg(char *cmd, rt_size_t length, char *argv[])
-{
-    int argc = 0;
-    char *ptr = cmd;
-
-    while ((ptr - cmd) < length)
-    {
-        /* strip bank and tab */
-        while ((*ptr == ' ' || *ptr == '\t') && (ptr - cmd) < length)
-            *ptr++ = '\0';
-        /* check whether it's the end of line */
-        if ((ptr - cmd) >= length) break;
-
-        /* handle string with quote */
-        if (*ptr == '"')
-        {
-            argv[argc++] = ++ptr;
-
-            /* skip this string */
-            while (*ptr != '"' && (ptr - cmd) < length)
-                if (*ptr ++ == '\\')  ptr ++;
-            if ((ptr - cmd) >= length) break;
-
-            /* skip '"' */
-            *ptr ++ = '\0';
-        }
-        else
-        {
-            argv[argc++] = ptr;
-            while ((*ptr != ' ' && *ptr != '\t') && (ptr - cmd) < length)
-                ptr ++;
-        }
-
-        if (argc >= RT_MODULE_ARG_MAX) break;
-    }
-
-    return argc;
-}
-
-/* module main thread entry */
-static void module_main_entry(void *parameter)
-{
-    int argc;
-    char *argv[RT_MODULE_ARG_MAX];
-    typedef int (*main_func_t)(int argc, char **argv);
-
-    rt_module_t module = (rt_module_t) parameter;
-    if (module == RT_NULL)
-        return;
-
-    if (module->module_cmd_line == RT_NULL && module->module_cmd_size != 0)
-        /* malloc for module_cmd_line failed. */
-        return;
-
-    /* FIXME: we should run some C++ initialize code before jump into the
-     * entry. */
-
-    if (module->module_cmd_line == RT_NULL)
-    {
-        RT_DEBUG_LOG(RT_DEBUG_MODULE, ("run bare entry: 0x%p\n",
-                                       module->module_entry));
-        ((main_func_t)module->module_entry)(0, RT_NULL);
-        return;
-    }
-
-    rt_memset(argv, 0x00, sizeof(argv));
-    argc = _rt_module_split_arg((char *)module->module_cmd_line,
-                                module->module_cmd_size, argv);
-    if (argc == 0)
-        return;
-
-    RT_DEBUG_LOG(RT_DEBUG_MODULE, ("run main entry: 0x%p with %s\n",
-                                   module->module_entry,
-                                   module->module_cmd_line));
-    /* do the main function */
-    ((main_func_t)module->module_entry)(argc, argv);
-    return;
-}
-
-/**
- * This function will load a module with a main function from memory and create a
- * main thread for it
- *
- * @param name the name of module, which shall be unique
- * @param module_ptr the memory address of module image
- * @argc the count of argument
- * @argd the argument data, which should be a
- *
- * @return the module object
- */
-rt_module_t rt_module_do_main(const char *name,
-                              void *module_ptr,
-                              const char *cmd_line,
-                              int line_size)
-{
-    rt_module_t module;
-
-    RT_DEBUG_NOT_IN_INTERRUPT;
-
-    RT_DEBUG_LOG(RT_DEBUG_MODULE, ("rt_module_load: %s\n", name));
-
-    /* check ELF header */
-    if (rt_memcmp(elf_module->e_ident, RTMMAG, SELFMAG) != 0 &&
-        rt_memcmp(elf_module->e_ident, ELFMAG, SELFMAG) != 0)
-    {
-        rt_kprintf("Module: magic error\n");
-
-        return RT_NULL;
-    }
-
-    /* check ELF class */
-    if (elf_module->e_ident[EI_CLASS] != ELFCLASS32)
-    {
-        rt_kprintf("Module: ELF class error\n");
-
-        return RT_NULL;
-    }
-
-    if (elf_module->e_type == ET_REL)
-    {
-        module = _load_relocated_object(name, module_ptr);
-    }
-    else if (elf_module->e_type == ET_DYN)
-    {
-        module = _load_shared_object(name, module_ptr);
-    }
-    else
-    {
-        rt_kprintf("Module: unsupported elf type\n");
-
-        return RT_NULL;
-    }
-
-    if (module == RT_NULL)
-        return RT_NULL;
-
-    if (line_size && cmd_line)
-    {
-        /* set module argument */
-        module->module_cmd_line = (rt_uint8_t *)rt_malloc(line_size + 1);
-        if (module->module_cmd_line)
-        {
-            rt_memcpy(module->module_cmd_line, cmd_line, line_size);
-            module->module_cmd_line[line_size] = '\0';
-        }
-        module->module_cmd_size = line_size;
-    }
-    else
-    {
-        /* initialize an empty command */
-        module->module_cmd_line = RT_NULL;
-        module->module_cmd_size = 0;
-    }
-
-    /* increase module reference count */
-    module->nref ++;
-
-    if (elf_module->e_entry != 0)
-    {
-        /* create module thread */
-        module->module_thread = rt_thread_create(name,
-                                                 module_main_entry, module,
-                                                 RT_USING_MODULE_STKSZ,
-                                                 RT_USING_MODULE_PRIO, 10);
-
-        RT_DEBUG_LOG(RT_DEBUG_MODULE, ("thread entry 0x%x\n",
-                                       module->module_entry));
-
-        /* set module id */
-        module->module_thread->module_id = (void *)module;
-        module->parent.flag = RT_MODULE_FLAG_WITHENTRY;
-
-        /* startup module thread */
-        rt_thread_startup(module->module_thread);
-    }
-    else
-    {
-        /* without entry point */
-        module->parent.flag |= RT_MODULE_FLAG_WITHOUTENTRY;
-    }
-
-#ifdef RT_USING_HOOK
-    if (rt_module_load_hook != RT_NULL)
-    {
-        rt_module_load_hook(module);
-    }
-#endif
-
-    return module;
-}
-
-/**
- * This function will load a module from memory and create a thread for it
- *
- * @param name the name of module, which shall be unique
- * @param module_ptr the memory address of module image
- *
- * @return the module object
- */
-rt_module_t rt_module_load(const char *name, void *module_ptr)
-{
-    return rt_module_do_main(name, module_ptr, RT_NULL, 0);
-}
-
-#ifdef RT_USING_DFS
-#include <dfs_posix.h>
-
-static char *_module_name(const char *path)
-{
-    const char *first, *end, *ptr;
-    char *name;
-    int size;
-
-    ptr   = (char *)path;
-    first = ptr;
-    end   = path + rt_strlen(path);
-
-    while (*ptr != '\0')
-    {
-        if (*ptr == '/')
-            first = ptr + 1;
-        if (*ptr == '.')
-            end = ptr - 1;
-
-        ptr ++;
-    }
-
-    size = end - first + 1;
-    name = rt_malloc(size);
-    rt_strncpy(name, first, size);
-    name[size] = '\0';
-
-    return name;
-}
-
-/**
- * This function will load a module from a file
- *
- * @param path the full path of application module
- *
- * @return the module object
- */
-rt_module_t rt_module_open(const char *path)
-{
-    int fd, length;
-    struct rt_module *module;
-    struct stat s;
-    char *buffer, *offset_ptr;
-    char *name;
-
-    RT_DEBUG_NOT_IN_INTERRUPT;
-
-    /* check parameters */
-    RT_ASSERT(path != RT_NULL);
-
-    if (stat(path, &s) != 0)
-    {
-        rt_kprintf("Module: access %s failed\n", path);
-
-        return RT_NULL;
-    }
-    buffer = (char *)rt_malloc(s.st_size);
-    if (buffer == RT_NULL)
-    {
-        rt_kprintf("Module: out of memory\n");
-
-        return RT_NULL;
-    }
-
-    offset_ptr = buffer;
-    fd = open(path, O_RDONLY, 0);
-    if (fd < 0)
-    {
-        rt_kprintf("Module: open %s failed\n", path);
-        rt_free(buffer);
-
-        return RT_NULL;
-    }
-
-    do
-    {
-        length = read(fd, offset_ptr, 4096);
-        if (length > 0)
-        {
-            offset_ptr += length;
-        }
-    }while (length > 0);
-
-    /* close fd */
-    close(fd);
-
-    if ((rt_uint32_t)offset_ptr - (rt_uint32_t)buffer != s.st_size)
-    {
-        rt_kprintf("Module: read file failed\n");
-        rt_free(buffer);
-
-        return RT_NULL;
-    }
-
-    name   = _module_name(path);
-    module = rt_module_load(name, (void *)buffer);
-    rt_free(buffer);
-    rt_free(name);
-
-    return module;
-}
-
-/**
- * This function will do a excutable program with main function and parameters.
- *
- * @param path the full path of application module
- * @param cmd_line the command line of program
- * @param size the size of command line of program
- *
- * @return the module object
- */
-rt_module_t rt_module_exec_cmd(const char *path, const char *cmd_line, int size)
-{
-    struct stat s;
-    int fd, length;
-    char *name, *buffer, *offset_ptr;
-    struct rt_module *module = RT_NULL;
-
-    name = buffer = RT_NULL;
-
-    RT_DEBUG_NOT_IN_INTERRUPT;
-
-    /* check parameters */
-    RT_ASSERT(path != RT_NULL);
-
-    /* get file size */
-    if (stat(path, &s) != 0)
-    {
-        rt_kprintf("Module: access %s failed\n", path);
-        goto __exit;
-    }
-
-    /* allocate buffer to save program */
-    offset_ptr = buffer = (char *)rt_malloc(s.st_size);
-    if (buffer == RT_NULL)
-    {
-        rt_kprintf("Module: out of memory\n");
-        goto __exit;
-    }
-
-    fd = open(path, O_RDONLY, 0);
-    if (fd < 0)
-    {
-        rt_kprintf("Module: open %s failed\n", path);
-        goto __exit;
-    }
-
-    do
-    {
-        length = read(fd, offset_ptr, 4096);
-        if (length > 0)
-        {
-            offset_ptr += length;
-        }
-    }while (length > 0);
-    /* close fd */
-    close(fd);
-
-    if ((rt_uint32_t)offset_ptr - (rt_uint32_t)buffer != s.st_size)
-    {
-        rt_kprintf("Module: read file failed\n");
-        goto __exit;
-    }
-
-    /* get module */
-    name   = _module_name(path);
-    /* execute module */
-    module = rt_module_do_main(name, (void *)buffer, cmd_line, size);
-
-__exit:
-    rt_free(buffer);
-    rt_free(name);
-
-    return module;
-}
-
-#if defined(RT_USING_FINSH)
-#include <finsh.h>
-FINSH_FUNCTION_EXPORT_ALIAS(rt_module_open, exec, exec module from a file);
-#endif
-
-#endif
-
-/**
- * This function will destroy a module and release its resource.
- *
- * @param module the module to be destroyed.
- *
- * @return the operation status, RT_EOK on OK; -RT_ERROR on error
- */
-rt_err_t rt_module_destroy(rt_module_t module)
-{
-    int i;
-
-    RT_DEBUG_NOT_IN_INTERRUPT;
-
-    /* check parameter */
-    RT_ASSERT(module != RT_NULL);
-    RT_ASSERT(module->nref == 0);
-    RT_ASSERT(rt_object_get_type(&module->parent) == RT_Object_Class_Module);
-
-    RT_DEBUG_LOG(RT_DEBUG_MODULE, ("rt_module_destroy: %8.*s\n",
-                                   RT_NAME_MAX, module->parent.name));
-
-    /* module has entry point */
-    if (!(module->parent.flag & RT_MODULE_FLAG_WITHOUTENTRY))
-    {
-        /* delete command line */
-        if (module->module_cmd_line != RT_NULL)
-        {
-            rt_free(module->module_cmd_line);
-        }
-    }
-
-    /* release module space memory */
-    rt_free(module->module_space);
-
-    /* release module symbol table */
-    for (i = 0; i < module->nsym; i ++)
-    {
-        rt_free((void *)module->symtab[i].name);
-    }
-    if (module->symtab != RT_NULL)
-        rt_free(module->symtab);
-
-    /* delete module object */
-    rt_object_delete((rt_object_t)module);
-
-    return RT_EOK;
-}
-
-/**
- * This function will unload a module from memory and release resources
- *
- * @param module the module to be unloaded
- *
- * @return the operation status, RT_EOK on OK; -RT_ERROR on error
- */
-rt_err_t rt_module_unload(rt_module_t module)
-{
-    RT_DEBUG_NOT_IN_INTERRUPT;
-
-    /* check parameter */
-    if (module == RT_NULL)
-        return -RT_ERROR;
-
-    rt_enter_critical();
-    /* invoke module cleanup */
-    rt_exit_critical();
-
-#ifdef RT_USING_HOOK
-    if (rt_module_unload_hook != RT_NULL)
-    {
-        rt_module_unload_hook(module);
-    }
-#endif
-
-    return RT_EOK;
-}
-
-/**
- * This function will find the specified module.
- *
- * @param name the name of module finding
- *
- * @return the module
- */
-rt_module_t rt_module_find(const char *name)
-{
-    struct rt_object_information *information;
-    struct rt_object *object;
-    struct rt_list_node *node;
-
-    RT_DEBUG_NOT_IN_INTERRUPT;
-
-    /* enter critical */
-    rt_enter_critical();
-
-    /* try to find device object */
-    information = rt_object_get_information(RT_Object_Class_Module);
-    RT_ASSERT(information != RT_NULL);
-    for (node = information->object_list.next;
-         node != &(information->object_list);
-         node = node->next)
-    {
-        object = rt_list_entry(node, struct rt_object, list);
-        if (rt_strncmp(object->name, name, RT_NAME_MAX) == 0)
-        {
-            /* leave critical */
-            rt_exit_critical();
-
-            return (rt_module_t)object;
-        }
-    }
-
-    /* leave critical */
-    rt_exit_critical();
-
-    /* not found */
-    return RT_NULL;
-}
-RTM_EXPORT(rt_module_find);
-
-#endif