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add module feature

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git-svn-id: https://rt-thread.googlecode.com/svn/trunk@614 bbd45198-f89e-11dd-88c7-29a3b14d5316
This commit is contained in:
qiuyiuestc
2010-04-12 17:37:37 +00:00
parent adcbe9d53f
commit cbfb87fac1
24 changed files with 1128 additions and 51 deletions
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src/module.c
+21 -11
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@@ -19,6 +19,19 @@
#include "module.h"
#include "kservice.h"
/* #define RT_MODULE_DEBUG */
#define elf_module ((Elf32_Ehdr *)module_ptr)
#define shdr ((Elf32_Shdr *)((rt_uint8_t *)module_ptr + elf_module->e_shoff))
#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
rt_list_t rt_module_symbol_list;
struct rt_module* rt_current_module;
@@ -55,17 +68,6 @@ rt_uint32_t rt_module_symbol_find(const rt_uint8_t* sym_str)
return 0;
}
#define elf_module ((Elf32_Ehdr *)module_ptr)
#define shdr ((Elf32_Shdr *)((rt_uint8_t *)module_ptr + elf_module->e_shoff))
#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))
int rt_module_arm_relocate(struct rt_module* module, Elf32_Rel *rel, Elf32_Addr sym_val, rt_uint32_t module_addr)
{
Elf32_Addr *where, tmp;
@@ -79,7 +81,9 @@ int rt_module_arm_relocate(struct rt_module* module, Elf32_Rel *rel, Elf32_Addr
case R_ARM_ABS32:
*where += (Elf32_Addr)sym_val;
#ifdef RT_MODULE_DEBUG
rt_kprintf("R_ARM_ABS32: %x -> %x\n", where, *where);
#endif
break;
case R_ARM_PC24:
@@ -92,7 +96,9 @@ int rt_module_arm_relocate(struct rt_module* module, Elf32_Rel *rel, Elf32_Addr
tmp = sym_val - (Elf32_Addr)where + (addend << 2);
tmp >>= 2;
*where = (*where & 0xff000000) | (tmp & 0x00ffffff);
#ifdef RT_MODULE_DEBUG
rt_kprintf("R_ARM_PC24: %x -> %x\n", where, *where);
#endif
break;
default:
@@ -275,7 +281,9 @@ struct rt_module* rt_module_load(void* module_ptr, const rt_uint8_t* name)
for (i = 0; i < nr_reloc; i ++)
{
Elf32_Sym *sym = &symtab[ELF32_R_SYM(rel->r_info)];
#ifdef RT_MODULE_DEBUG
rt_kprintf("relocate symbol: %s\n", strtab + sym->st_name);
#endif
if (sym->st_shndx != STN_UNDEF)
{
if(ELF_ST_TYPE(sym->st_info) == STT_SECTION)
@@ -310,7 +318,9 @@ struct rt_module* rt_module_load(void* module_ptr, const rt_uint8_t* name)
}
else
{
#ifdef RT_MODULE_DEBUG
rt_kprintf("unresolved relocate symbol: %s\n", strtab + sym->st_name);
#endif
/* need to resolve symbol in kernel symbol table */
Elf32_Addr addr = rt_module_symbol_find(strtab + sym->st_name);
if (addr != (Elf32_Addr)RT_NULL)