diff options
| author | qiuyiuestc <[email protected]> | 2010-04-12 17:37:37 +0000 |
|---|---|---|
| committer | qiuyiuestc <[email protected]> | 2010-04-12 17:37:37 +0000 |
| commit | cbfb87fac1020380eca3b15b32ea738820059007 (patch) | |
| tree | 23522eed21d5abc36ff4ff9fcbf69806cc13e627 /src/module.c | |
| parent | adcbe9d53fbd9753a2f3037569e3d2db8876d0d8 (diff) | |
add module feature
git-svn-id: https://rt-thread.googlecode.com/svn/trunk@614 bbd45198-f89e-11dd-88c7-29a3b14d5316
Diffstat (limited to 'src/module.c')
| -rw-r--r-- | src/module.c | 32 |
1 files changed, 21 insertions, 11 deletions
diff --git a/src/module.c b/src/module.c index 4316d171d6..a2958cc66b 100644 --- a/src/module.c +++ b/src/module.c @@ -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) |