Android so库文件的区节section修复代码分析
本文博客地址：http://blog.csdn.net/qq1084283172/article/details/78818917
一、Android so库文件的节表secion修复方案整理
https://bbs.pediy.com/thread-191649.htm
2. ELF section修复的一些思考
https://bbs.pediy.com/thread-192874.htm
3. 从零打造简单的SODUMP工具
https://bbs.pediy.com/thread-194053.htm
4. 基于init_array加密的SO的脱壳
http://ele7enxxh.com/Unpack-Android-Shared-Library-Based-On-Init_Array-Encryption.html
5. ELF文件格式学习，section修复
http://blog.csdn.net/yi_nuo_wang/article/details/72626846
6. Android逆向中So模块自动化修复工具+实战一发
https://bbs.pediy.com/thread-221741.htm
7. Android加固中So文件自动化修复工具GUI
https://bbs.pediy.com/thread-221878.htm
8. SoFixer
https://github.com/F8LEFT/SoFixer
二、Android so库文件的节表secion修复的方案讨论
Android so库文件的节表secion修复的方法，最早是由 ThomasKing 在《ELF section修复的一些思考》一文中提到的，尽管方法还不是很完美但是使用 IDA Pro 对修复后Android so库文件进行静态逆向分析，效果还是不错的。需要提到的是：Android系统 7.0 以后，Android系统在进行Android
so库文件的加载时，会对加载的Android so库文件 ELF 格式的seciton节表进行检查和判断，因此以后为了兼顾Android 7.0的系统，Android加固会保留被保护Android so库文件的section节表，但是并不代表Android加固会减弱对Android so库文件的保护。
被Android 加固保护的Android so库文件尽管已经失去了 ELF 文件格式的section节表头段信息，但是通过 ThomasKing 提到的ELF section修复的方法，还是可以修复绝大部分的对静态逆向分析有用的seciton节表头段。ELF 文件格式有两种视图：链接视图和执行视图，ELF文件在编译链接的时候需要链接格式的视图，在ELF文件执行的时候需要执行视图不需要链接视图。
Android so库文件加载到内存并解析链接主要依赖于ELF文件格式的可执行视图，在ELF文件可执行视图的情况下，有一个重要结构的 程序段描述头表 .dynamic段，.dynamic段里保存了动态连接器所需要的基本信息如下图所示：
很显然，根据ELF文件可执行视图时的.dynamic段描述的一些信息，能够获取到ELF文件链接视图时的一些重要区节表头的偏移和大小信息，可以完成对这些section区节的重建，.dynamic段 在Android so库文件的动态链接时的实现代码如下所示（以Android 4.4.4 r1的源码为例）：
static bool soinfo_link_image(soinfo* si) {
/* "base" might wrap around UINT32_MAX. */
Elf32_Addr base = si->load_bias;
const Elf32_Phdr *phdr = si->phdr;
int phnum = si->phnum;
bool relocating_linker = (si->flags & FLAG_LINKER) != 0;
/* We can't debug anything until the linker is relocated */
if (!relocating_linker) {
INFO("[ linking %s ]", si->name);
DEBUG("si->base = 0x%08x si->flags = 0x%08x", si->base, si->flags);
}
/* Extract dynamic section */
size_t dynamic_count;
Elf32_Word dynamic_flags;
phdr_table_get_dynamic_section(phdr, phnum, base, &si->dynamic,
&dynamic_count, &dynamic_flags);
if (si->dynamic == NULL) {
if (!relocating_linker) {
DL_ERR("missing PT_DYNAMIC in \"%s\"", si->name);
}
return false;
} else {
if (!relocating_linker) {
DEBUG("dynamic = %p", si->dynamic);
}
}
#ifdef ANDROID_ARM_LINKER
(void) phdr_table_get_arm_exidx(phdr, phnum, base,
&si->ARM_exidx, &si->ARM_exidx_count);
#endif
// Extract useful information from dynamic section.
// 从动态连接段.dynamic段获取重要信息
uint32_t needed_count = 0;
for (Elf32_Dyn* d = si->dynamic; d->d_tag != DT_NULL; ++d) {
DEBUG("d = %p, d[0](tag) = 0x%08x d[1](val) = 0x%08x", d, d->d_tag, d->d_un.d_val);
switch(d->d_tag){
case DT_HASH:
si->nbucket = ((unsigned *) (base + d->d_un.d_ptr))[0];
si->nchain = ((unsigned *) (base + d->d_un.d_ptr))[1];
si->bucket = (unsigned *) (base + d->d_un.d_ptr + 8);
si->chain = (unsigned *) (base + d->d_un.d_ptr + 8 + si->nbucket * 4);
break;
case DT_STRTAB:
si->strtab = (const char *) (base + d->d_un.d_ptr);
break;
case DT_SYMTAB:
si->symtab = (Elf32_Sym *) (base + d->d_un.d_ptr);
break;
case DT_PLTREL:
if (d->d_un.d_val != DT_REL) {
DL_ERR("unsupported DT_RELA in \"%s\"", si->name);
return false;
}
break;
case DT_JMPREL:
si->plt_rel = (Elf32_Rel*) (base + d->d_un.d_ptr);
break;
case DT_PLTRELSZ:
si->plt_rel_count = d->d_un.d_val / sizeof(Elf32_Rel);
break;
case DT_REL:
si->rel = (Elf32_Rel*) (base + d->d_un.d_ptr);
break;
case DT_RELSZ:
si->rel_count = d->d_un.d_val / sizeof(Elf32_Rel);
break;
case DT_PLTGOT:
/* Save this in case we decide to do lazy binding. We don't yet. */
si->plt_got = (unsigned *)(base + d->d_un.d_ptr);
break;
case DT_DEBUG:
// Set the DT_DEBUG entry to the address of _r_debug for GDB
// if the dynamic table is writable
if ((dynamic_flags & PF_W) != 0) {
d->d_un.d_val = (int) &_r_debug;
}
break;
case DT_RELA:
DL_ERR("unsupported DT_RELA in \"%s\"", si->name);
return false;
case DT_INIT:
si->init_func = reinterpret_cast<linker_function_t>(base + d->d_un.d_ptr);
DEBUG("%s constructors (DT_INIT) found at %p", si->name, si->init_func);
break;
case DT_FINI:
si->fini_func = reinterpret_cast<linker_function_t>(base + d->d_un.d_ptr);
DEBUG("%s destructors (DT_FINI) found at %p", si->name, si->fini_func);
break;
case DT_INIT_ARRAY:
si->init_array = reinterpret_cast<linker_function_t*>(base + d->d_un.d_ptr);
DEBUG("%s constructors (DT_INIT_ARRAY) found at %p", si->name, si->init_array);
break;
case DT_INIT_ARRAYSZ:
si->init_array_count = ((unsigned)d->d_un.d_val) / sizeof(Elf32_Addr);
break;
case DT_FINI_ARRAY:
si->fini_array = reinterpret_cast<linker_function_t*>(base + d->d_un.d_ptr);
DEBUG("%s destructors (DT_FINI_ARRAY) found at %p", si->name, si->fini_array);
break;
case DT_FINI_ARRAYSZ:
si->fini_array_count = ((unsigned)d->d_un.d_val) / sizeof(Elf32_Addr);
break;
case DT_PREINIT_ARRAY:
si->preinit_array = reinterpret_cast<linker_function_t*>(base + d->d_un.d_ptr);
DEBUG("%s constructors (DT_PREINIT_ARRAY) found at %p", si->name, si->preinit_array);
break;
case DT_PREINIT_ARRAYSZ:
si->preinit_array_count = ((unsigned)d->d_un.d_val) / sizeof(Elf32_Addr);
break;
case DT_TEXTREL:
si->has_text_relocations = true;
break;
case DT_SYMBOLIC:
si->has_DT_SYMBOLIC = true;
break;
case DT_NEEDED:
++needed_count;
break;
#if defined DT_FLAGS
// TODO: why is DT_FLAGS not defined?
case DT_FLAGS:
if (d->d_un.d_val & DF_TEXTREL) {
si->has_text_relocations = true;
}
if (d->d_un.d_val & DF_SYMBOLIC) {
si->has_DT_SYMBOLIC = true;
}
break;
#endif
#if defined(ANDROID_MIPS_LINKER)
case DT_STRSZ:
case DT_SYMENT:
case DT_RELENT:
break;
case DT_MIPS_RLD_MAP:
// Set the DT_MIPS_RLD_MAP entry to the address of _r_debug for GDB.
{
r_debug** dp = (r_debug**) d->d_un.d_ptr;
*dp = &_r_debug;
}
break;
case DT_MIPS_RLD_VERSION:
case DT_MIPS_FLAGS:
case DT_MIPS_BASE_ADDRESS:
case DT_MIPS_UNREFEXTNO:
break;
case DT_MIPS_SYMTABNO:
si->mips_symtabno = d->d_un.d_val;
break;
case DT_MIPS_LOCAL_GOTNO:
si->mips_local_gotno = d->d_un.d_val;
break;
case DT_MIPS_GOTSYM:
si->mips_gotsym = d->d_un.d_val;
break;
default:
DEBUG("Unused DT entry: type 0x%08x arg 0x%08x", d->d_tag, d->d_un.d_val);
break;
#endif
}
}
DEBUG("si->base = 0x%08x, si->strtab = %p, si->symtab = %p",
si->base, si->strtab, si->symtab);
// Sanity checks.
if (relocating_linker && needed_count != 0) {
DL_ERR("linker cannot have DT_NEEDED dependencies on other libraries");
return false;
}
if (si->nbucket == 0) {
DL_ERR("empty/missing DT_HASH in \"%s\" (built with --hash-style=gnu?)", si->name);
return false;
}
if (si->strtab == 0) {
DL_ERR("empty/missing DT_STRTAB in \"%s\"", si->name);
return false;
}
if (si->symtab == 0) {
DL_ERR("empty/missing DT_SYMTAB in \"%s\"", si->name);
return false;
}
// If this is the main executable, then load all of the libraries from LD_PRELOAD now.
if (si->flags & FLAG_EXE) {
memset(gLdPreloads, 0, sizeof(gLdPreloads));
size_t preload_count = 0;
for (size_t i = 0; gLdPreloadNames[i] != NULL; i++) {
soinfo* lsi = find_library(gLdPreloadNames[i]);
if (lsi != NULL) {
gLdPreloads[preload_count++] = lsi;
} else {
// As with glibc, failure to load an LD_PRELOAD library is just a warning.
DL_WARN("could not load library \"%s\" from LD_PRELOAD for \"%s\"; caused by %s",
gLdPreloadNames[i], si->name, linker_get_error_buffer());
}
}
}
soinfo** needed = (soinfo**) alloca((1 + needed_count) * sizeof(soinfo*));
soinfo** pneeded = needed;
for (Elf32_Dyn* d = si->dynamic; d->d_tag != DT_NULL; ++d) {
if (d->d_tag == DT_NEEDED) {
const char* library_name = si->strtab + d->d_un.d_val;
DEBUG("%s needs %s", si->name, library_name);
soinfo* lsi = find_library(library_name);
if (lsi == NULL) {
strlcpy(tmp_err_buf, linker_get_error_buffer(), sizeof(tmp_err_buf));
DL_ERR("could not load library \"%s\" needed by \"%s\"; caused by %s",
library_name, si->name, tmp_err_buf);
return false;
}
*pneeded++ = lsi;
}
}
*pneeded = NULL;
if (si->has_text_relocations) {
/* Unprotect the segments, i.e. make them writable, to allow
* text relocations to work properly. We will later call
* phdr_table_protect_segments() after all of them are applied
* and all constructors are run.
*/
DL_WARN("%s has text relocations. This is wasting memory and is "
"a security risk. Please fix.", si->name);
if (phdr_table_unprotect_segments(si->phdr, si->phnum, si->load_bias) < 0) {
DL_ERR("can't unprotect loadable segments for \"%s\": %s",
si->name, strerror(errno));
return false;
}
}
if (si->plt_rel != NULL) {
DEBUG("[ relocating %s plt ]", si->name );
if (soinfo_relocate(si, si->plt_rel, si->plt_rel_count, needed)) {
return false;
}
}
if (si->rel != NULL) {
DEBUG("[ relocating %s ]", si->name );
if (soinfo_relocate(si, si->rel, si->rel_count, needed)) {
return false;
}
}
#ifdef ANDROID_MIPS_LINKER
if (!mips_relocate_got(si, needed)) {
return false;
}
#endif
si->flags |= FLAG_LINKED;
DEBUG("[ finished linking %s ]", si->name);
if (si->has_text_relocations) {
/* All relocations are done, we can protect our segments back to
* read-only. */
if (phdr_table_protect_segments(si->phdr, si->phnum, si->load_bias) < 0) {
DL_ERR("can't protect segments for \"%s\": %s",
si->name, strerror(errno));
return false;
}
}
/* We can also turn on GNU RELRO protection */
if (phdr_table_protect_gnu_relro(si->phdr, si->phnum, si->load_bias) < 0) {
DL_ERR("can't enable GNU RELRO protection for \"%s\": %s",
si->name, strerror(errno));
return false;
}
notify_gdb_of_load(si);
return true;
}通过Android NDK提供的工具 readelf程序 可以查看ELF文件格式相关的信息，执行 readelf -l xxx.so
命令可以查看ELF文件的链接视图 区节section 和 可执行视图的 段 segment
的映射对应关系如下所示，再结合可执行视图时 .dynamic段 解析所能获取到的一些重要的区节表头的内存相对虚拟地址（VA）和大小（size）信息，可以实现ELF文件的链接视图重要区节section的重建，这也是 ThomasKing 提供的ELF文件节表section修复的思路。现在有些Android加固为了防止Android so库文件的节表section被修复，在外壳Android so库文件的构造函数调用时完成了JNI_Onload函数的代码解密之后，会将外壳Android
so库文件的ELF文件头和程序段segment表的信息在内存抹掉，防止外壳Android so库文件的内存dump和dump之后的节表section被修复。
在文章《ELF section修复的一些思考》中，ThomasKing 提供的Android so库文件的节表section修复的思路整理如下：
从segment信息可以看出, 对.dynamic和.arm_exidx的section重建很简单，即读取即可。
通过.dynamic段，可以对大部分section进行重建，具体如下：
1． 通过DT_SYMTAB，DT_STRTAB，DT_STRSZ，DT_REL，DT_RELSZ，DT_JMPREL， DT_PLTRELSZ，DT_INIT_ARRAY，DT_INIT_ARRAYSZ，DT_FINI_ARRAY，DT_FINI_ARRAYSZ 得到.dynsym，.dynstr, rel.dyn, rel.plt, init_array, fini_array
相应的section vaddr 和 size信息，完成对上述section的重建。这里需要注意，处于load2中的section，offset = vaddr – 0x1000。
2． 通过DT_HASH得到hash section的vaddr，然后读入前两项得到nbucket和nchain的值，得到hashsz = (nbucket + nchain + 2) * sizeof(int), 完成对hash表重建。
3． Plt的起始位置即为rel.plt的末尾，通过1中的对rel.plt的处理，即可得到plt的offset和vaddr信息。通过plt的结构知道，plt由固定16字节 + 4字节的__global__offset_table变量和n个需要重定位的函数地址构成，函数地址又与rel.plt中的结构一一对应。故size = (20 + 12 * (rel.plt.size) / sizeof(Elf32_Rel)。
4. 从DT_PLTGOT可以得到__global_offset_table的偏移位置。由got表的结构知道，__global_offset_table前是rel.dyn重定位结构，之后为rel.plt重定位结构，都与rel一一对应。则got表的重建具体为：通过已重建的.dynamic得到got起始位置，通过__global_offset_table 偏移 + 4 * (rel.plt.size)
/ sizeof(Elf32_Rel)(这里还需要添加2个int的填充位置)得到got的末尾，通过首尾位置得到got的size，完成重建。
5． 通过got的末尾，得到data的起始位置，再通过load2_vaddr + load2_filesz得到load2的末尾(load2即第二个LOAD)，即data的末尾位置，计算长度，完成修正。可能读者会问，bss才是load2的最后一个section。的确，但bss为NOBITS，即可把data看作load2最后一个section。
6． 对bss的修正就很简单，offset和vaddr即为load2末尾。由于未NOBITS类型，长度信息无关紧要。
7． 到这里，读者可能已经发现，还没对text和ARM.extab修正。限于本人水平，还没能找到方法区分开这两个section。现处理是将之合并，作为text & ARM.extab节。具体修正：offset和vaddr通过plt末尾得到，长度通过ARM.exidx的起始位置和plt末尾位置计算得到。
8. 至此，绝大部分section信息已经重建完成。最后，在将shstrtab添加，并修正Elf32_Ehdr，完成section重建。虽然未100%重建，但已经能够帮助分析了。重建后的如图所示，图中红色部分即是未分离的test & ARM.extab section。
文章《ELF文件格式学习，section修复》就是根据ThomasKing 提供的Android so库文件的节表section修复的思路实现的代码，但是该作者提供的代码还是有一些小问题，比如说，关于ELF文件的节表section修复时候，申请存放section头表内存的大小（应该使用elf文件加载到内存后的文件大小，因为Android
so加固会修改ELF文件头中关于section区节的描述变量如偏移、大小等信息）以及构造的seciton区节名称字符串表的存放文件偏移有点小问题（第2个P_LOAD段结束的位置偏移），不应该按照这个思路去处理，并且作者给出的代码只能适用于从内存中dump出的Android so库文件的修复，考虑的还不是很周到。本来打算将作者的代码优化和修改一下的，但是没那么多精力，就不献丑了，还是要感谢原作者王一诺和ThomasKing。
文章《ELF文件格式学习，section修复》的作者在进行seciton重建的时候，对区节section段的描述结构体
Elf32_Shdr 中，除sh_addr、sh_offset、sh_size、sh_name之外的其他成员变量的信息没有修正，其实修正也很简单，直接按照下图中 Android so库文件 链接视图中区节section信息 进行对应区节section头表段成员变量属性值的修正。通过Android NDK 提供的工具readelf，执行
readelf –S 命令，即可得到Android so库文件的链接视图时的各区节section段的描述结构体Elf32_Shdr的其他成员变量的属性值，对照着对应的段进行Elf32_Shdr结构体其他成员变量的属性值的修正。
typedef struct elf32_shdr {
Elf32_Word sh_name;
Elf32_Word sh_type;
Elf32_Word sh_flags;
Elf32_Addr sh_addr;
Elf32_Off sh_offset;
Elf32_Word sh_size;
Elf32_Word sh_link;
Elf32_Word sh_info;
Elf32_Word sh_addralign;
Elf32_Word sh_entsize;
} Elf32_Shdr;
typedef struct elf64_shdr {
Elf64_Word sh_name; /* Section name, index in string tbl */
Elf64_Word sh_type; /* Type of section */
Elf64_Xword sh_flags; /* Miscellaneous section attributes */
Elf64_Addr sh_addr; /* Section virtual addr at execution */
Elf64_Off sh_offset; /* Section file offset */
Elf64_Xword sh_size; /* Size of section in bytes */
Elf64_Word sh_link; /* Index of another section */
Elf64_Word sh_info; /* Additional section information */
Elf64_Xword sh_addralign; /* Section alignment */
Elf64_Xword sh_entsize; /* Entry size if section holds table */
} Elf64_Shdr;
文章《ELF文件格式学习，section修复》的作者对 ThomasKing 提出的ELF文件的区节表section修复方案的思考和疑问。
三、对文章《ELF文件格式学习，section修复》中的代码进行分析。
对文章《ELF文件格式学习，section修复》中 提到的代码进行了注释分析，工程主要有3个源码文件 elf.h、fix.h、fix.c
组成，Android so库文件区节section修复主要操作的源码文件 fix.c 的代码注释如下：
#define _CRT_SECURE_NO_WARNINGS
#include "fix.h"
#ifndef SHT_ARM_EXIDX
#define SHT_ARM_EXIDX (SHT_LOPROC + 1)
#endif
#define SHT_INIT_ARRAY 14
#define SHT_FINI_ARRAY 15
#define SHF_LINK_ORDER (1 << 7) /* Preserve order after combining */
char* str = "..dynsym..dynstr..hash..rel.dyn..rel.plt..text..ARM.extab..ARM.exidx..fini_array..init_array..dynamic..got..data..bass..shstrtab\0";
char* str1 = "..dynsym\0.dynstr\0.hash\0.rel.dyn\0.rel.plt\0.text\0.ARM.extab\0.ARM.exidx\0.fini_array\0.init_array\0.dynamic\0.got\0.data\0.bass\0.shstrtab\0";
Elf32_Shdr shdr[SHDRS] = { 0 };
// 读取ELF文件的Elf32_Ehdr信息
void get_elf_header(char* buffer, Elf32_Ehdr** pehdr)
{
int header_len = sizeof(Elf32_Ehdr);
memset(*pehdr, 0, header_len);
memcpy(*pehdr, (void*)buffer, header_len);
}
// 读取ELF文件的程序头表的信息
void get_program_table(Elf32_Ehdr ehdr, char* buffer, Elf32_Phdr** pphdr)
{
int ph_size = ehdr.e_phentsize;
int ph_num = ehdr.e_phnum;
memset(*pphdr, 0, ph_size * ph_num);
memcpy(*pphdr, buffer + ehdr.e_phoff,ph_size * ph_num);
}
// 获取需要修复的Android so文件的大小
long get_file_len(FILE* p)
{
fseek (p, 0, SEEK_END);
// 获取到整个文件的大小
long fsize = ftell (p);
// 重新设置文件指针到开头
rewind (p);
return fsize;
}
// 进行需要修复的ELF文件的区节头表的重建
void get_Info(Elf32_Phdr* phdr, Elf32_Ehdr *pehdr, char* buffer,
char** sh_buffer, int sh_len)
{
Elf32_Dyn* dyn = NULL;
Elf32_Dyn* d = NULL;
Elf32_Phdr load = { 0 };
int ph_num = pehdr->e_phnum;
int dyn_size = 0, dyn_off = 0;
int nbucket = 0, nchain = 0;
int flag = 0, i = 0;
// 用于存放ELF文件的区节头表信息
memset(*sh_buffer, 0, sh_len);
i = 0;
for(;i < ph_num;i++) {
if (phdr[i].p_type == PT_LOAD) {
if (phdr[i].p_vaddr > 0x0) {
load = phdr[i];
// 进行 .bss 区节头的重建
shdr[BSS].sh_name = strstr(str,".bss") - str;
shdr[BSS].sh_type = SHT_NOBITS;
shdr[BSS].sh_flags = SHF_WRITE | SHF_ALLOC;
shdr[BSS].sh_addr = phdr[i].p_vaddr + phdr[i].p_filesz;
shdr[BSS].sh_offset = shdr[BSS].sh_addr - 0x1000;
shdr[BSS].sh_size = 0;
shdr[BSS].sh_link = 0;
shdr[BSS].sh_info = 0;
shdr[BSS].sh_entsize = 0
shdr[BSS].sh_addralign = 1;
continue;
}
}
if(phdr[i].p_type == PT_DYNAMIC) {
// 进行 .dynamic 区节头的重建
// 设置".dynamic"区节头名称在.shstr.tab中的偏移值
shdr[DYNAMIC].sh_name = strstr(str, ".dynamic") - str;
shdr[DYNAMIC].sh_type = SHT_DYNAMIC;
shdr[DYNAMIC].sh_flags = SHF_WRITE | SHF_ALLOC;
shdr[DYNAMIC].sh_addr = phdr[i].p_vaddr;
shdr[DYNAMIC].sh_offset = phdr[i].p_offset;
shdr[DYNAMIC].sh_size = phdr[i].p_filesz;
shdr[DYNAMIC].sh_link = 2;
shdr[DYNAMIC].sh_info = 0;
shdr[DYNAMIC].sh_addralign = 4;
shdr[DYNAMIC].sh_entsize = 8;
// 得到.dynamic区节段的数据
dyn_off = phdr[i].p_offset;
dyn_size = phdr[i].p_filesz;
continue;
}
// ThomasKing修复时使用的是PT_LOPROC + 1
if(phdr[i].p_type == PT_LOPROC || phdr[i].p_type == PT_LOPROC + 1) {
// 进行".ARM.exidx" 区节头的重建
shdr[ARMEXIDX].sh_name = strstr(str, ".ARM.exidx") - str;
shdr[ARMEXIDX].sh_type = SHT_ARM_EXIDX;
shdr[ARMEXIDX].sh_flags = SHF_ALLOC + SHF_LINK_ORDER;
shdr[ARMEXIDX].sh_addr = phdr[i].p_vaddr;
shdr[ARMEXIDX].sh_offset = phdr[i].p_offset;
shdr[ARMEXIDX].sh_size = phdr[i].p_filesz;
shdr[ARMEXIDX].sh_link = 7;
shdr[ARMEXIDX].sh_info = 0;
shdr[ARMEXIDX].sh_addralign = 4;
shdr[ARMEXIDX].sh_entsize = 8;
continue;
}
}
// 申请内存空间
dyn = (Elf32_Dyn*)malloc(dyn_size);
// 获取整个".dynamic"区节的数据（Elf32_Dyn[]数组）
memcpy(dyn, buffer+dyn_off, dyn_size);
i = 0;
// 对".dynamic"区节的数据进行解析处理
for (; i < dyn_size / sizeof(Elf32_Dyn); i++) {
switch (dyn[i].d_tag) {
case DT_SYMTAB:
// 对动态符号表 .dynsym 区节头进行重建
shdr[DYNSYM].sh_name = strstr(str, ".dynsym") - str;
shdr[DYNSYM].sh_type = SHT_DYNSYM;
shdr[DYNSYM].sh_flags = SHF_ALLOC;
shdr[DYNSYM].sh_addr = dyn[i].d_un.d_ptr;
shdr[DYNSYM].sh_offset = dyn[i].d_un.d_ptr;
shdr[DYNSYM].sh_link = 2;
shdr[DYNSYM].sh_info = 1;
shdr[DYNSYM].sh_addralign = 4;
shdr[DYNSYM].sh_entsize = 16;
// shdr[DYNSYM].sh_size还需要修复
break;
case DT_STRTAB:
// 对动态符号表 .dynstr 区节头进行重建
shdr[DYNSTR].sh_name = strstr(str, ".dynstr") - str;
shdr[DYNSTR].sh_type = SHT_STRTAB;
shdr[DYNSTR].sh_flags = SHF_ALLOC;
shdr[DYNSTR].sh_offset = dyn[i].d_un.d_ptr;
shdr[DYNSTR].sh_addr = dyn[i].d_un.d_ptr;
// 添加的
shdr[DYNSYM].sh_link = 0;
shdr[DYNSYM].sh_info = 0;
//
shdr[DYNSTR].sh_addralign = 1;
shdr[DYNSTR].sh_entsize = 0;
break;
case DT_HASH:
// 对符号哈希表 .hash 的区节头进行重建
shdr[HASH].sh_name = strstr(str, ".hash") - str;
shdr[HASH].sh_type = SHT_HASH;
shdr[HASH].sh_flags = SHF_ALLOC;
shdr[HASH].sh_addr = dyn[i].d_un.d_ptr;
shdr[HASH].sh_offset = dyn[i].d_un.d_ptr;
memcpy(&nbucket, buffer + shdr[HASH].sh_offset, 4);
memcpy(&nchain, buffer + shdr[HASH].sh_offset + 4, 4);
// 和.hash区节的数据结构有关
shdr[HASH].sh_size = (nbucket + nchain + 2) * sizeof(int);
shdr[HASH].sh_link = 1;
shdr[HASH].sh_info = 0;
shdr[HASH].sh_addralign = 4;
shdr[HASH].sh_entsize = 4;
break;
case DT_REL:
// 对 .rel.dyn 的区节头进行重建
shdr[RELDYN].sh_name = strstr(str, ".rel.dyn") - str;
shdr[RELDYN].sh_type = SHT_REL;
shdr[RELDYN].sh_flags = SHF_ALLOC;
shdr[RELDYN].sh_addr = dyn[i].d_un.d_ptr;
shdr[RELDYN].sh_offset = dyn[i].d_un.d_ptr;
shdr[RELDYN].sh_link = 1;
shdr[RELDYN].sh_info = 0;
shdr[RELDYN].sh_addralign = 4;
shdr[RELDYN].sh_entsize = 8;
break;
case DT_JMPREL:
// 对 .rel.plt 的区节头进行重建
shdr[RELPLT].sh_name = strstr(str, ".rel.plt") - str;
shdr[RELPLT].sh_type = SHT_REL;
shdr[RELPLT].sh_flags = SHF_ALLOC;
shdr[RELPLT].sh_addr = dyn[i].d_un.d_ptr;
shdr[RELPLT].sh_offset = dyn[i].d_un.d_ptr;
shdr[RELPLT].sh_link = 1;
shdr[RELPLT].sh_info = 6;
shdr[RELPLT].sh_addralign = 4;
shdr[RELPLT].sh_entsize = 8;
break;
case DT_PLTRELSZ:
shdr[RELPLT].sh_size = dyn[i].d_un.d_val;
break;
case DT_FINI:
// 对.fini_array 的区节头进行重建
shdr[FINIARRAY].sh_name = strstr(str, ".fini_array") - str;
shdr[FINIARRAY].sh_type = SHT_FINI_ARRAY;
shdr[FINIARRAY].sh_flags = SHF_WRITE | SHF_ALLOC;
shdr[FINIARRAY].sh_offset = dyn[i].d_un.d_ptr - 0x1000;
shdr[FINIARRAY].sh_addr = dyn[i].d_un.d_ptr;
shdr[FINIARRAY].sh_link = 0
shdr[FINIARRAY].sh_info = 0
shdr[FINIARRAY].sh_addralign = 4;
shdr[FINIARRAY].sh_entsize = 0;
break;
case DT_INIT:
// 对.init_array 的区节头进行重建
shdr[INITARRAY].sh_name = strstr(str, ".init_array") - str;
shdr[INITARRAY].sh_type = SHT_INIT_ARRAY;
shdr[INITARRAY].sh_flags = SHF_WRITE | SHF_ALLOC;
shdr[INITARRAY].sh_offset = dyn[i].d_un.d_ptr - 0x1000;
shdr[INITARRAY].sh_addr = dyn[i].d_un.d_ptr;
shdr[INITARRAY].sh_link = 0;
shdr[INITARRAY].sh_info = 0;
shdr[INITARRAY].sh_addralign = 4;
shdr[INITARRAY].sh_entsize = 0;
break;
case DT_RELSZ:
shdr[RELDYN].sh_size = dyn[i].d_un.d_val;
break;
case DT_STRSZ:
shdr[DYNSTR].sh_size = dyn[i].d_un.d_val;
break;
case DT_PLTGOT:
// 对.got 的区节头进行重建
shdr[GOT].sh_name = strstr(str, ".got") - str;
shdr[GOT].sh_type = SHT_PROGBITS;
shdr[GOT].sh_flags = SHF_WRITE | SHF_ALLOC;
shdr[GOT].sh_addr = shdr[DYNAMIC].sh_addr + shdr[DYNAMIC].sh_size;
shdr[GOT].sh_offset = shdr[GOT].sh_addr - 0x1000;
// 需要后面修正
shdr[GOT].sh_size = dyn[i].d_un.d_ptr;
shdr[GOT].sh_link = 0;
shdr[GOT].sh_info = 0;
shdr[GOT].sh_addralign = 4;
shdr[GOT].sh_entsize = 0;
break;
}
}
// .got区节数据的大小
shdr[GOT].sh_size = shdr[GOT].sh_size + 4 * (shdr[RELPLT].sh_size) / sizeof(Elf32_Rel) + 3 * sizeof(int) - shdr[GOT].sh_addr;
//STRTAB地址 - SYMTAB地址 = SYMTAB大小
shdr[DYNSYM].sh_size = shdr[DYNSTR].sh_addr - shdr[DYNSYM].sh_addr;
shdr[FINIARRAY].sh_size = shdr[INITARRAY].sh_addr - shdr[FINIARRAY].sh_addr;
shdr[INITARRAY].sh_size = shdr[DYNAMIC].sh_addr - shdr[INITARRAY].sh_addr;
// 对.plt 的区节头进行重建
shdr[PLT].sh_name = strstr(str, ".plt") - str;
shdr[PLT].sh_type = SHT_PROGBITS;
shdr[PLT].sh_flags = SHF_ALLOC | SHF_EXECINSTR;
shdr[PLT].sh_addr = shdr[RELPLT].sh_addr + shdr[RELPLT].sh_size;
shdr[PLT].sh_offset = shdr[PLT].sh_addr;
shdr[PLT].sh_size = (20 + 12 * (shdr[RELPLT].sh_size) / sizeof(Elf32_Rel));
shdr[PLT].sh_link = 0;
shdr[PLT].sh_info = 0;
shdr[PLT].sh_entsize = 0;
shdr[PLT].sh_addralign = 4;
// 对.text 的区节头进行重建( .text 与 .ARM.text 区节暂时无法分离开)
shdr[TEXT].sh_name = strstr(str, ".text") - str;
shdr[TEXT].sh_type = SHT_PROGBITS;
shdr[TEXT].sh_flags = SHF_ALLOC | SHF_EXECINSTR;
shdr[TEXT].sh_addr = shdr[PLT].sh_addr + shdr[PLT].sh_size;
shdr[TEXT].sh_offset = shdr[TEXT].sh_addr;
// 注意
shdr[TEXT].sh_size = shdr[ARMEXIDX].sh_addr - shdr[TEXT].sh_addr;
shdr[TEXT].sh_link = 0
shdr[TEXT].sh_info = 0
shdr[TEXT].sh_entsize = 0
shdr[TEXT].sh_addralign = 4
// 对.data 的区节头进行重建
shdr[DATA].sh_name = strstr(str, ".data") - str;
shdr[DATA].sh_type = SHT_PROGBITS;
shdr[DATA].sh_flags = SHF_WRITE | SHF_ALLOC;
shdr[DATA].sh_addr = shdr[GOT].sh_addr + shdr[GOT].sh_size;
shdr[DATA].sh_offset = shdr[DATA].sh_addr - 0x1000;
shdr[DATA].sh_size = load.p_vaddr + load.p_filesz - shdr[DATA].sh_addr;
shdr[DATA].sh_link = 0
shdr[DATA].sh_info = 0
shdr[DATA].sh_entsize = 0
shdr[DATA].sh_addralign = 4;
// 对.shstrtab 区节头的重建
shdr[STRTAB].sh_name = strstr(str, ".shstrtab") - str;
shdr[STRTAB].sh_type = SHT_STRTAB;
shdr[STRTAB].sh_flags = SHT_NULL;
shdr[STRTAB].sh_addr = 0;
shdr[STRTAB].sh_offset = shdr[BSS].sh_addr - 0x1000;
shdr[STRTAB].sh_size = strlen(str) + 1;
shdr[STRTAB].sh_link = 0;
shdr[STRTAB].sh_info = 0;
shdr[STRTAB].sh_entsize = 0;
shdr[STRTAB].sh_addralign = 1;
//memcpy(buffer + shdr[STRTAB].sh_offset, str, strlen(str));
// 将ELF文件的区节头表信息拷贝到指定内存中
memcpy(*sh_buffer, shdr, sizeof(shdr));
}
// main函数（ELF32的Android so的修复）
// 一个传入参数：需要修复的Android so文件路径
// 例如: needFix.so，修复后的so文件名称为fix.so
int main(int argc, char const *argv[])
{
FILE* fr = NULL;
long flen = 0;
FILE* fw = NULL;
int ph_len = 0;
char* buffer = NULL;
char* sh_buffer = NULL;
Elf32_Ehdr *pehdr = NULL;
Elf32_Phdr* pphdr = NULL;
char arr[2048] = { 0 };
// 传入参数检查
if (argc < 2) {
printf("less args\n");
return;
}
// 打开需要修复的Android so文件
fr = fopen(argv[1], "rb");
if(fr == NULL) {
printf("Open failed: \n");
goto error;
}
// 获取需要修复的Android so文件的大小
flen = get_file_len(fr);
// 申请内存空间存放需要修复的Android so文件
buffer = (char*)malloc(sizeof(char)*flen);
if (buffer == NULL) {
printf("Malloc error\n");
goto error;
}
// 读取需要整个修复的Android so文件到申请的内存空间中
size_t result = fread (buffer, 1, flen, fr);
if (result != flen) {
printf("Reading error\n");
goto error;
}
// 创建新文件 fix.so 用于保存修复后的Android so
fw = fopen("fix.so","wb");
if(fw == NULL) {
printf("Open failed: fix.so\n");
goto error;
}
pehdr = (Elf32_Ehdr*)malloc(sizeof(Elf32_Ehdr));
// 读取ELF文件的Elf32_Ehdr信息到申请的内存空间中
get_elf_header(buffer, &pehdr);
// 获取ELF文件的程序头Elf32_Phdr表的大小
ph_len = pehdr->e_phentsize * pehdr->e_phnum;
pphdr = (Elf32_Phdr*)malloc(ph_len);
// 读取ELF文件的程序头表的信息到申请的内存空间中
get_program_table(*pehdr, buffer, &pphdr);
// 这个地方有一点问题
// 申请内存到用于存放ELF文件的区节头表信息
sh_buffer = (char* )malloc(pehdr->e_shentsize * pehdr->e_shnum);
// 进行需要修复的Android so的区节头表的重建
get_Info(pphdr, pehdr, buffer, &sh_buffer, pehdr->e_shentsize * pehdr->e_shnum);
// 将重建后的ELF文件的区节头表信息进行回写和更正
memcpy(buffer + pehdr->e_shoff, sh_buffer, pehdr->e_shentsize * pehdr->e_shnum);
// 修复Android so文件的ELF文件头中关于节头表的信息
pehdr->e_shnum = SHDRS;
pehdr->e_shstrndx = SHDRS - 1;
memcpy(buffer, pehdr, sizeof(Elf32_Ehdr));
// SHSTRTAB
// 新增.shstrtab 节数据到需要修复的Android so文件中
memcpy(buffer + shdr[STRTAB].sh_offset, str1, strlen(str) + 1);
// 将修复的信息更新写入到新的文件fix.so中
fwrite(buffer, sizeof(char)*flen, 1, fw);
error:
if(fw != NULL)
fclose(fw);
if(fr != NULL)
fclose(fr);
if(buffer != NULL)
free(buffer);
return 0;
}头文件 elf.h 的代码如下：
#ifndef _QEMU_ELF_H
#define _QEMU_ELF_H
#include <inttypes.h>
/* 32-bit ELF base types. */
typedef uint32_t Elf32_Addr;
typedef uint16_t Elf32_Half;
typedef uint32_t Elf32_Off;
typedef int32_t Elf32_Sword;
typedef uint32_t Elf32_Word;
/* 64-bit ELF base types. */
typedef uint64_t Elf64_Addr;
typedef uint16_t Elf64_Half;
typedef int16_t Elf64_SHalf;
typedef uint64_t Elf64_Off;
typedef int32_t Elf64_Sword;
typedef uint32_t Elf64_Word;
typedef uint64_t Elf64_Xword;
typedef int64_t Elf64_Sxword;
/* These constants are for the segment types stored in the image headers */
#define PT_NULL 0
#define PT_LOAD 1
#define PT_DYNAMIC 2
#define PT_INTERP 3
#define PT_NOTE 4
#define PT_SHLIB 5
#define PT_PHDR 6
#define PT_LOPROC 0x70000000
#define PT_HIPROC 0x7fffffff
#define PT_MIPS_REGINFO 0x70000000
#define PT_MIPS_OPTIONS 0x70000001
/* Flags in the e_flags field of the header */
/* MIPS architecture level. */
#define EF_MIPS_ARCH_1 0x00000000 /* -mips1 code. */
#define EF_MIPS_ARCH_2 0x10000000 /* -mips2 code. */
#define EF_MIPS_ARCH_3 0x20000000 /* -mips3 code. */
#define EF_MIPS_ARCH_4 0x30000000 /* -mips4 code. */
#define EF_MIPS_ARCH_5 0x40000000 /* -mips5 code. */
#define EF_MIPS_ARCH_32 0x50000000 /* MIPS32 code. */
#define EF_MIPS_ARCH_64 0x60000000 /* MIPS64 code. */
/* The ABI of a file. */
#define EF_MIPS_ABI_O32 0x00001000 /* O32 ABI. */
#define EF_MIPS_ABI_O64 0x00002000 /* O32 extended for 64 bit. */
#define EF_MIPS_NOREORDER 0x00000001
#define EF_MIPS_PIC 0x00000002
#define EF_MIPS_CPIC 0x00000004
#define EF_MIPS_ABI2 0x00000020
#define EF_MIPS_OPTIONS_FIRST 0x00000080
#define EF_MIPS_32BITMODE 0x00000100
#define EF_MIPS_ABI 0x0000f000
#define EF_MIPS_ARCH 0xf0000000
/* These constants define the different elf file types */
#define ET_NONE 0
#define ET_REL 1
#define ET_EXEC 2
#define ET_DYN 3
#define ET_CORE 4
#define ET_LOPROC 0xff00
#define ET_HIPROC 0xffff
/* These constants define the various ELF target machines */
#define EM_NONE 0
#define EM_M32 1
#define EM_SPARC 2
#define EM_386 3
#define EM_68K 4
#define EM_88K 5
#define EM_486 6 /* Perhaps disused */
#define EM_860 7
#define EM_MIPS 8 /* MIPS R3000 (officially, big-endian only) */
#define EM_MIPS_RS4_BE 10 /* MIPS R4000 big-endian */
#define EM_PARISC 15 /* HPPA */
#define EM_SPARC32PLUS 18 /* Sun's "v8plus" */
#define EM_PPC 20 /* PowerPC */
#define EM_PPC64 21 /* PowerPC64 */
#define EM_ARM 40 /* ARM */
#define EM_SH 42 /* SuperH */
#define EM_SPARCV9 43 /* SPARC v9 64-bit */
#define EM_IA_64 50 /* HP/Intel IA-64 */
#define EM_X86_64 62 /* AMD x86-64 */
#define EM_S390 22 /* IBM S/390 */
#define EM_CRIS 76 /* Axis Communications 32-bit embedded processor */
#define EM_V850 87 /* NEC v850 */
#define EM_H8_300H 47 /* Hitachi H8/300H */
#define EM_H8S 48 /* Hitachi H8S */
/*
* This is an interim value that we will use until the committee comes
* up with a final number.
*/
#define EM_ALPHA 0x9026
/* Bogus old v850 magic number, used by old tools. */
#define EM_CYGNUS_V850 0x9080
/*
* This is the old interim value for S/390 architecture
*/
#define EM_S390_OLD 0xA390
/* This is the info that is needed to parse the dynamic section of the file */
#define DT_NULL 0
#define DT_NEEDED 1
#define DT_PLTRELSZ 2
#define DT_PLTGOT 3
#define DT_HASH 4
#define DT_STRTAB 5
#define DT_SYMTAB 6
#define DT_RELA 7
#define DT_RELASZ 8
#define DT_RELAENT 9
#define DT_STRSZ 10
#define DT_SYMENT 11
#define DT_INIT 25
#define DT_FINI 26
#define DT_SONAME 14
#define DT_RPATH 15
#define DT_SYMBOLIC 16
#define DT_REL 17
#define DT_RELSZ 18
#define DT_RELENT 19
#define DT_PLTREL 20
#define DT_DEBUG 21
#define DT_TEXTREL 22
#define DT_JMPREL 23
#define DT_LOPROC 0x70000000
#define DT_HIPROC 0x7fffffff
#define DT_MIPS_RLD_VERSION 0x70000001
#define DT_MIPS_TIME_STAMP 0x70000002
#define DT_MIPS_ICHECKSUM 0x70000003
#define DT_MIPS_IVERSION 0x70000004
#define DT_MIPS_FLAGS 0x70000005
#define RHF_NONE 0
#define RHF_HARDWAY 1
#define RHF_NOTPOT 2
#define DT_MIPS_BASE_ADDRESS 0x70000006
#define DT_MIPS_CONFLICT 0x70000008
#define DT_MIPS_LIBLIST 0x70000009
#define DT_MIPS_LOCAL_GOTNO 0x7000000a
#define DT_MIPS_CONFLICTNO 0x7000000b
#define DT_MIPS_LIBLISTNO 0x70000010
#define DT_MIPS_SYMTABNO 0x70000011
#define DT_MIPS_UNREFEXTNO 0x70000012
#define DT_MIPS_GOTSYM 0x70000013
#define DT_MIPS_HIPAGENO 0x70000014
#define DT_MIPS_RLD_MAP 0x70000016
/* This info is needed when parsing the symbol table */
#define STB_LOCAL 0
#define STB_GLOBAL 1
#define STB_WEAK 2
#define STT_NOTYPE 0
#define STT_OBJECT 1
#define STT_FUNC 2
#define STT_SECTION 3
#define STT_FILE 4
#define ELF_ST_BIND(x) ((x) >> 4)
#define ELF_ST_TYPE(x) (((unsigned int) x) & 0xf)
#define ELF32_ST_BIND(x) ELF_ST_BIND(x)
#define ELF32_ST_TYPE(x) ELF_ST_TYPE(x)
#define ELF64_ST_BIND(x) ELF_ST_BIND(x)
#define ELF64_ST_TYPE(x) ELF_ST_TYPE(x)
/* Symbolic values for the entries in the auxiliary table
put on the initial stack */
#define AT_NULL 0 /* end of vector */
#define AT_IGNORE 1 /* entry should be ignored */
#define AT_EXECFD 2 /* file descriptor of program */
#define AT_PHDR 3 /* program headers for program */
#define AT_PHENT 4 /* size of program header entry */
#define AT_PHNUM 5 /* number of program headers */
#define AT_PAGESZ 6 /* system page size */
#define AT_BASE 7 /* base address of interpreter */
#define AT_FLAGS 8 /* flags */
#define AT_ENTRY 9 /* entry point of program */
#define AT_NOTELF 10 /* program is not ELF */
#define AT_UID 11 /* real uid */
#define AT_EUID 12 /* effective uid */
#define AT_GID 13 /* real gid */
#define AT_EGID 14 /* effective gid */
#define AT_PLATFORM 15 /* string identifying CPU for optimizations */
#define AT_HWCAP 16 /* arch dependent hints at CPU capabilities */
#define AT_CLKTCK 17 /* frequency at which times() increments */
typedef struct dynamic{
Elf32_Sword d_tag;
union{
Elf32_Sword d_val;
Elf32_Addr d_ptr;
} d_un;
} Elf32_Dyn;
typedef struct {
Elf64_Sxword d_tag; /* entry tag value */
union {
Elf64_Xword d_val;
Elf64_Addr d_ptr;
} d_un;
} Elf64_Dyn;
/* The following are used with relocations */
#define ELF32_R_SYM(x) ((x) >> 8)
#define ELF32_R_TYPE(x) ((x) & 0xff)
#define ELF64_R_SYM(i) ((i) >> 32)
#define ELF64_R_TYPE(i) ((i) & 0xffffffff)
#define ELF64_R_TYPE_DATA(i) (((ELF64_R_TYPE(i) >> 8) ^ 0x00800000) - 0x00800000)
#define R_386_NONE 0
#define R_386_32 1
#define R_386_PC32 2
#define R_386_GOT32 3
#define R_386_PLT32 4
#define R_386_COPY 5
#define R_386_GLOB_DAT 6
#define R_386_JMP_SLOT 7
#define R_386_RELATIVE 8
#define R_386_GOTOFF 9
#define R_386_GOTPC 10
#define R_386_NUM 11
#define R_MIPS_NONE 0
#define R_MIPS_16 1
#define R_MIPS_32 2
#define R_MIPS_REL32 3
#define R_MIPS_26 4
#define R_MIPS_HI16 5
#define R_MIPS_LO16 6
#define R_MIPS_GPREL16 7
#define R_MIPS_LITERAL 8
#define R_MIPS_GOT16 9
#define R_MIPS_PC16 10
#define R_MIPS_CALL16 11
#define R_MIPS_GPREL32 12
/* The remaining relocs are defined on Irix, although they are not
in the MIPS ELF ABI. */
#define R_MIPS_UNUSED1 13
#define R_MIPS_UNUSED2 14
#define R_MIPS_UNUSED3 15
#define R_MIPS_SHIFT5 16
#define R_MIPS_SHIFT6 17
#define R_MIPS_64 18
#define R_MIPS_GOT_DISP 19
#define R_MIPS_GOT_PAGE 20
#define R_MIPS_GOT_OFST 21
/*
* The following two relocation types are specified in the MIPS ABI
* conformance guide version 1.2 but not yet in the psABI.
*/
#define R_MIPS_GOTHI16 22
#define R_MIPS_GOTLO16 23
#define R_MIPS_SUB 24
#define R_MIPS_INSERT_A 25
#define R_MIPS_INSERT_B 26
#define R_MIPS_DELETE 27
#define R_MIPS_HIGHER 28
#define R_MIPS_HIGHEST 29
/*
* The following two relocation types are specified in the MIPS ABI
* conformance guide version 1.2 but not yet in the psABI.
*/
#define R_MIPS_CALLHI16 30
#define R_MIPS_CALLLO16 31
/*
* This range is reserved for vendor specific relocations.
*/
#define R_MIPS_LOVENDOR 100
#define R_MIPS_HIVENDOR 127
/*
* Sparc ELF relocation types
*/
#define R_SPARC_NONE 0
#define R_SPARC_8 1
#define R_SPARC_16 2
#define R_SPARC_32 3
#define R_SPARC_DISP8 4
#define R_SPARC_DISP16 5
#define R_SPARC_DISP32 6
#define R_SPARC_WDISP30 7
#define R_SPARC_WDISP22 8
#define R_SPARC_HI22 9
#define R_SPARC_22 10
#define R_SPARC_13 11
#define R_SPARC_LO10 12
#define R_SPARC_GOT10 13
#define R_SPARC_GOT13 14
#define R_SPARC_GOT22 15
#define R_SPARC_PC10 16
#define R_SPARC_PC22 17
#define R_SPARC_WPLT30 18
#define R_SPARC_COPY 19
#define R_SPARC_GLOB_DAT 20
#define R_SPARC_JMP_SLOT 21
#define R_SPARC_RELATIVE 22
#define R_SPARC_UA32 23
#define R_SPARC_PLT32 24
#define R_SPARC_HIPLT22 25
#define R_SPARC_LOPLT10 26
#define R_SPARC_PCPLT32 27
#define R_SPARC_PCPLT22 28
#define R_SPARC_PCPLT10 29
#define R_SPARC_10 30
#define R_SPARC_11 31
#define R_SPARC_64 32
#define R_SPARC_OLO10 33
#define R_SPARC_HH22 34
#define R_SPARC_HM10 35
#define R_SPARC_LM22 36
#define R_SPARC_WDISP16 40
#define R_SPARC_WDISP19 41
#define R_SPARC_7 43
#define R_SPARC_5 44
#define R_SPARC_6 45
/* Bits present in AT_HWCAP, primarily for Sparc32. */
#define HWCAP_SPARC_FLUSH 1 /* CPU supports flush instruction. */
#define HWCAP_SPARC_STBAR 2
#define HWCAP_SPARC_SWAP 4
#define HWCAP_SPARC_MULDIV 8
#define HWCAP_SPARC_V9 16
#define HWCAP_SPARC_ULTRA3 32
/*
* 68k ELF relocation types
*/
#define R_68K_NONE 0
#define R_68K_32 1
#define R_68K_16 2
#define R_68K_8 3
#define R_68K_PC32 4
#define R_68K_PC16 5
#define R_68K_PC8 6
#define R_68K_GOT32 7
#define R_68K_GOT16 8
#define R_68K_GOT8 9
#define R_68K_GOT32O 10
#define R_68K_GOT16O 11
#define R_68K_GOT8O 12
#define R_68K_PLT32 13
#define R_68K_PLT16 14
#define R_68K_PLT8 15
#define R_68K_PLT32O 16
#define R_68K_PLT16O 17
#define R_68K_PLT8O 18
#define R_68K_COPY 19
#define R_68K_GLOB_DAT 20
#define R_68K_JMP_SLOT 21
#define R_68K_RELATIVE 22
/*
* Alpha ELF relocation types
*/
#define R_ALPHA_NONE 0 /* No reloc */
#define R_ALPHA_REFLONG 1 /* Direct 32 bit */
#define R_ALPHA_REFQUAD 2 /* Direct 64 bit */
#define R_ALPHA_GPREL32 3 /* GP relative 32 bit */
#define R_ALPHA_LITERAL 4 /* GP relative 16 bit w/optimization */
#define R_ALPHA_LITUSE 5 /* Optimization hint for LITERAL */
#define R_ALPHA_GPDISP 6 /* Add displacement to GP */
#define R_ALPHA_BRADDR 7 /* PC+4 relative 23 bit shifted */
#define R_ALPHA_HINT 8 /* PC+4 relative 16 bit shifted */
#define R_ALPHA_SREL16 9 /* PC relative 16 bit */
#define R_ALPHA_SREL32 10 /* PC relative 32 bit */
#define R_ALPHA_SREL64 11 /* PC relative 64 bit */
#define R_ALPHA_GPRELHIGH 17 /* GP relative 32 bit, high 16 bits */
#define R_ALPHA_GPRELLOW 18 /* GP relative 32 bit, low 16 bits */
#define R_ALPHA_GPREL16 19 /* GP relative 16 bit */
#define R_ALPHA_COPY 24 /* Copy symbol at runtime */
#define R_ALPHA_GLOB_DAT 25 /* Create GOT entry */
#define R_ALPHA_JMP_SLOT 26 /* Create PLT entry */
#define R_ALPHA_RELATIVE 27 /* Adjust by program base */
#define R_ALPHA_BRSGP 28
#define R_ALPHA_TLSGD 29
#define R_ALPHA_TLS_LDM 30
#define R_ALPHA_DTPMOD64 31
#define R_ALPHA_GOTDTPREL 32
#define R_ALPHA_DTPREL64 33
#define R_ALPHA_DTPRELHI 34
#define R_ALPHA_DTPRELLO 35
#define R_ALPHA_DTPREL16 36
#define R_ALPHA_GOTTPREL 37
#define R_ALPHA_TPREL64 38
#define R_ALPHA_TPRELHI 39
#define R_ALPHA_TPRELLO 40
#define R_ALPHA_TPREL16 41
#define SHF_ALPHA_GPREL 0x10000000
/* PowerPC relocations defined by the ABIs */
#define R_PPC_NONE 0
#define R_PPC_ADDR32 1 /* 32bit absolute address */
#define R_PPC_ADDR24 2 /* 26bit address, 2 bits ignored. */
#define R_PPC_ADDR16 3 /* 16bit absolute address */
#define R_PPC_ADDR16_LO 4 /* lower 16bit of absolute address */
#define R_PPC_ADDR16_HI 5 /* high 16bit of absolute address */
#define R_PPC_ADDR16_HA 6 /* adjusted high 16bit */
#define R_PPC_ADDR14 7 /* 16bit address, 2 bits ignored */
#define R_PPC_ADDR14_BRTAKEN 8
#define R_PPC_ADDR14_BRNTAKEN 9
#define R_PPC_REL24 10 /* PC relative 26 bit */
#define R_PPC_REL14 11 /* PC relative 16 bit */
#define R_PPC_REL14_BRTAKEN 12
#define R_PPC_REL14_BRNTAKEN 13
#define R_PPC_GOT16 14
#define R_PPC_GOT16_LO 15
#define R_PPC_GOT16_HI 16
#define R_PPC_GOT16_HA 17
#define R_PPC_PLTREL24 18
#define R_PPC_COPY 19
#define R_PPC_GLOB_DAT 20
#define R_PPC_JMP_SLOT 21
#define R_PPC_RELATIVE 22
#define R_PPC_LOCAL24PC 23
#define R_PPC_UADDR32 24
#define R_PPC_UADDR16 25
#define R_PPC_REL32 26
#define R_PPC_PLT32 27
#define R_PPC_PLTREL32 28
#define R_PPC_PLT16_LO 29
#define R_PPC_PLT16_HI 30
#define R_PPC_PLT16_HA 31
#define R_PPC_SDAREL16 32
#define R_PPC_SECTOFF 33
#define R_PPC_SECTOFF_LO 34
#define R_PPC_SECTOFF_HI 35
#define R_PPC_SECTOFF_HA 36
/* Keep this the last entry. */
#define R_PPC_NUM 37
/* ARM specific declarations */
/* Processor specific flags for the ELF header e_flags field. */
#define EF_ARM_RELEXEC 0x01
#define EF_ARM_HASENTRY 0x02
#define EF_ARM_INTERWORK 0x04
#define EF_ARM_APCS_26 0x08
#define EF_ARM_APCS_FLOAT 0x10
#define EF_ARM_PIC 0x20
#define EF_ALIGN8 0x40 /* 8-bit structure alignment is in use */
#define EF_NEW_ABI 0x80
#define EF_OLD_ABI 0x100
/* Additional symbol types for Thumb */
#define STT_ARM_TFUNC 0xd
/* ARM-specific values for sh_flags */
#define SHF_ARM_ENTRYSECT 0x10000000 /* Section contains an entry point */
#define SHF_ARM_COMDEF 0x80000000 /* Section may be multiply defined
in the input to a link step */
/* ARM-specific program header flags */
#define PF_ARM_SB 0x10000000 /* Segment contains the location
addressed by the static base */
/* ARM relocs. */
#define R_ARM_NONE 0 /* No reloc */
#define R_ARM_PC24 1 /* PC relative 26 bit branch */
#define R_ARM_ABS32 2 /* Direct 32 bit */
#define R_ARM_REL32 3 /* PC relative 32 bit */
#define R_ARM_PC13 4
#define R_ARM_ABS16 5 /* Direct 16 bit */
#define R_ARM_ABS12 6 /* Direct 12 bit */
#define R_ARM_THM_ABS5 7
#define R_ARM_ABS8 8 /* Direct 8 bit */
#define R_ARM_SBREL32 9
#define R_ARM_THM_PC22 10
#define R_ARM_THM_PC8 11
#define R_ARM_AMP_VCALL9 12
#define R_ARM_SWI24 13
#define R_ARM_THM_SWI8 14
#define R_ARM_XPC25 15
#define R_ARM_THM_XPC22 16
#define R_ARM_COPY 20 /* Copy symbol at runtime */
#define R_ARM_GLOB_DAT 21 /* Create GOT entry */
#define R_ARM_JUMP_SLOT 22 /* Create PLT entry */
#define R_ARM_RELATIVE 23 /* Adjust by program base */
#define R_ARM_GOTOFF 24 /* 32 bit offset to GOT */
#define R_ARM_GOTPC 25 /* 32 bit PC relative offset to GOT */
#define R_ARM_GOT32 26 /* 32 bit GOT entry */
#define R_ARM_PLT32 27 /* 32 bit PLT address */
#define R_ARM_CALL 28
#define R_ARM_JUMP24 29
#define R_ARM_GNU_VTENTRY 100
#define R_ARM_GNU_VTINHERIT 101
#define R_ARM_THM_PC11 102 /* thumb unconditional branch */
#define R_ARM_THM_PC9 103 /* thumb conditional branch */
#define R_ARM_RXPC25 249
#define R_ARM_RSBREL32 250
#define R_ARM_THM_RPC22 251
#define R_ARM_RREL32 252
#define R_ARM_RABS22 253
#define R_ARM_RPC24 254
#define R_ARM_RBASE 255
/* Keep this the last entry. */
#define R_ARM_NUM 256
/* s390 relocations defined by the ABIs */
#define R_390_NONE 0 /* No reloc. */
#define R_390_8 1 /* Direct 8 bit. */
#define R_390_12 2 /* Direct 12 bit. */
#define R_390_16 3 /* Direct 16 bit. */
#define R_390_32 4 /* Direct 32 bit. */
#define R_390_PC32 5 /* PC relative 32 bit. */
#define R_390_GOT12 6 /* 12 bit GOT offset. */
#define R_390_GOT32 7 /* 32 bit GOT offset. */
#define R_390_PLT32 8 /* 32 bit PC relative PLT address. */
#define R_390_COPY 9 /* Copy symbol at runtime. */
#define R_390_GLOB_DAT 10 /* Create GOT entry. */
#define R_390_JMP_SLOT 11 /* Create PLT entry. */
#define R_390_RELATIVE 12 /* Adjust by program base. */
#define R_390_GOTOFF32 13 /* 32 bit offset to GOT. */
#define R_390_GOTPC 14 /* 32 bit PC rel. offset to GOT. */
#define R_390_GOT16 15 /* 16 bit GOT offset. */
#define R_390_PC16 16 /* PC relative 16 bit. */
#define R_390_PC16DBL 17 /* PC relative 16 bit shifted by 1. */
#define R_390_PLT16DBL 18 /* 16 bit PC rel. PLT shifted by 1. */
#define R_390_PC32DBL 19 /* PC relative 32 bit shifted by 1. */
#define R_390_PLT32DBL 20 /* 32 bit PC rel. PLT shifted by 1. */
#define R_390_GOTPCDBL 21 /* 32 bit PC rel. GOT shifted by 1. */
#define R_390_64 22 /* Direct 64 bit. */
#define R_390_PC64 23 /* PC relative 64 bit. */
#define R_390_GOT64 24 /* 64 bit GOT offset. */
#define R_390_PLT64 25 /* 64 bit PC relative PLT address. */
#define R_390_GOTENT 26 /* 32 bit PC rel. to GOT entry >> 1. */
#define R_390_GOTOFF16 27 /* 16 bit offset to GOT. */
#define R_390_GOTOFF64 28 /* 64 bit offset to GOT. */
#define R_390_GOTPLT12 29 /* 12 bit offset to jump slot. */
#define R_390_GOTPLT16 30 /* 16 bit offset to jump slot. */
#define R_390_GOTPLT32 31 /* 32 bit offset to jump slot. */
#define R_390_GOTPLT64 32 /* 64 bit offset to jump slot. */
#define R_390_GOTPLTENT 33 /* 32 bit rel. offset to jump slot. */
#define R_390_PLTOFF16 34 /* 16 bit offset from GOT to PLT. */
#define R_390_PLTOFF32 35 /* 32 bit offset from GOT to PLT. */
#define R_390_PLTOFF64 36 /* 16 bit offset from GOT to PLT. */
#define R_390_TLS_LOAD 37 /* Tag for load insn in TLS code. */
#define R_390_TLS_GDCALL 38 /* Tag for function call in general
dynamic TLS code. */
#define R_390_TLS_LDCALL 39 /* Tag for function call in local
dynamic TLS code. */
#define R_390_TLS_GD32 40 /* Direct 32 bit for general dynamic
thread local data. */
#define R_390_TLS_GD64 41 /* Direct 64 bit for general dynamic
thread local data. */
#define R_390_TLS_GOTIE12 42 /* 12 bit GOT offset for static TLS
block offset. */
#define R_390_TLS_GOTIE32 43 /* 32 bit GOT offset for static TLS
block offset. */
#define R_390_TLS_GOTIE64 44 /* 64 bit GOT offset for static TLS
block offset. */
#define R_390_TLS_LDM32 45 /* Direct 32 bit for local dynamic
thread local data in LD code. */
#define R_390_TLS_LDM64 46 /* Direct 64 bit for local dynamic
thread local data in LD code. */
#define R_390_TLS_IE32 47 /* 32 bit address of GOT entry for
negated static TLS block offset. */
#define R_390_TLS_IE64 48 /* 64 bit address of GOT entry for
negated static TLS block offset. */
#define R_390_TLS_IEENT 49 /* 32 bit rel. offset to GOT entry for
negated static TLS block offset. */
#define R_390_TLS_LE32 50 /* 32 bit negated offset relative to
static TLS block. */
#define R_390_TLS_LE64 51 /* 64 bit negated offset relative to
static TLS block. */
#define R_390_TLS_LDO32 52 /* 32 bit offset relative to TLS
block. */
#define R_390_TLS_LDO64 53 /* 64 bit offset relative to TLS
block. */
#define R_390_TLS_DTPMOD 54 /* ID of module containing symbol. */
#define R_390_TLS_DTPOFF 55 /* Offset in TLS block. */
#define R_390_TLS_TPOFF 56 /* Negate offset in static TLS
block. */
/* Keep this the last entry. */
#define R_390_NUM 57
/* x86-64 relocation types */
#define R_X86_64_NONE 0 /* No reloc */
#define R_X86_64_64 1 /* Direct 64 bit */
#define R_X86_64_PC32 2 /* PC relative 32 bit signed */
#define R_X86_64_GOT32 3 /* 32 bit GOT entry */
#define R_X86_64_PLT32 4 /* 32 bit PLT address */
#define R_X86_64_COPY 5 /* Copy symbol at runtime */
#define R_X86_64_GLOB_DAT 6 /* Create GOT entry */
#define R_X86_64_JUMP_SLOT 7 /* Create PLT entry */
#define R_X86_64_RELATIVE 8 /* Adjust by program base */
#define R_X86_64_GOTPCREL 9 /* 32 bit signed pc relative
offset to GOT */
#define R_X86_64_32 10 /* Direct 32 bit zero extended */
#define R_X86_64_32S 11 /* Direct 32 bit sign extended */
#define R_X86_64_16 12 /* Direct 16 bit zero extended */
#define R_X86_64_PC16 13 /* 16 bit sign extended pc relative */
#define R_X86_64_8 14 /* Direct 8 bit sign extended */
#define R_X86_64_PC8 15 /* 8 bit sign extended pc relative */
#define R_X86_64_NUM 16
/* Legal values for e_flags field of Elf64_Ehdr. */
#define EF_ALPHA_32BIT 1 /* All addresses are below 2GB */
/* HPPA specific definitions. */
/* Legal values for e_flags field of Elf32_Ehdr. */
#define EF_PARISC_TRAPNIL 0x00010000 /* Trap nil pointer dereference. */
#define EF_PARISC_EXT 0x00020000 /* Program uses arch. extensions. */
#define EF_PARISC_LSB 0x00040000 /* Program expects little endian. */
#define EF_PARISC_WIDE 0x00080000 /* Program expects wide mode. */
#define EF_PARISC_NO_KABP 0x00100000 /* No kernel assisted branch
prediction. */
#define EF_PARISC_LAZYSWAP 0x00400000 /* Allow lazy swapping. */
#define EF_PARISC_ARCH 0x0000ffff /* Architecture version. */
/* Defined values for `e_flags & EF_PARISC_ARCH' are: */
#define EFA_PARISC_1_0 0x020b /* PA-RISC 1.0 big-endian. */
#define EFA_PARISC_1_1 0x0210 /* PA-RISC 1.1 big-endian. */
#define EFA_PARISC_2_0 0x0214 /* PA-RISC 2.0 big-endian. */
/* Additional section indeces. */
#define SHN_PARISC_ANSI_COMMON 0xff00 /* Section for tenatively declared
symbols in ANSI C. */
#define SHN_PARISC_HUGE_COMMON 0xff01 /* Common blocks in huge model. */
/* Legal values for sh_type field of Elf32_Shdr. */
#define SHT_PARISC_EXT 0x70000000 /* Contains product specific ext. */
#define SHT_PARISC_UNWIND 0x70000001 /* Unwind information. */
#define SHT_PARISC_DOC 0x70000002 /* Debug info for optimized code. */
/* Legal values for sh_flags field of Elf32_Shdr. */
#define SHF_PARISC_SHORT 0x20000000 /* Section with short addressing. */
#define SHF_PARISC_HUGE 0x40000000 /* Section far from gp. */
#define SHF_PARISC_SBP 0x80000000 /* Static branch prediction code. */
/* Legal values for ST_TYPE subfield of st_info (symbol type). */
#define STT_PARISC_MILLICODE 13 /* Millicode function entry point. */
#define STT_HP_OPAQUE (STT_LOOS + 0x1)
#define STT_HP_STUB (STT_LOOS + 0x2)
/* HPPA relocs. */
#define R_PARISC_NONE 0 /* No reloc. */
#define R_PARISC_DIR32 1 /* Direct 32-bit reference. */
#define R_PARISC_DIR21L 2 /* Left 21 bits of eff. address. */
#define R_PARISC_DIR17R 3 /* Right 17 bits of eff. address. */
#define R_PARISC_DIR17F 4 /* 17 bits of eff. address. */
#define R_PARISC_DIR14R 6 /* Right 14 bits of eff. address. */
#define R_PARISC_PCREL32 9 /* 32-bit rel. address. */
#define R_PARISC_PCREL21L 10 /* Left 21 bits of rel. address. */
#define R_PARISC_PCREL17R 11 /* Right 17 bits of rel. address. */
#define R_PARISC_PCREL17F 12 /* 17 bits of rel. address. */
#define R_PARISC_PCREL14R 14 /* Right 14 bits of rel. address. */
#define R_PARISC_DPREL21L 18 /* Left 21 bits of rel. address. */
#define R_PARISC_DPREL14R 22 /* Right 14 bits of rel. address. */
#define R_PARISC_GPREL21L 26 /* GP-relative, left 21 bits. */
#define R_PARISC_GPREL14R 30 /* GP-relative, right 14 bits. */
#define R_PARISC_LTOFF21L 34 /* LT-relative, left 21 bits. */
#define R_PARISC_LTOFF14R 38 /* LT-relative, right 14 bits. */
#define R_PARISC_SECREL32 41 /* 32 bits section rel. address. */
#define R_PARISC_SEGBASE 48 /* No relocation, set segment base. */
#define R_PARISC_SEGREL32 49 /* 32 bits segment rel. address. */
#define R_PARISC_PLTOFF21L 50 /* PLT rel. address, left 21 bits. */
#define R_PARISC_PLTOFF14R 54 /* PLT rel. address, right 14 bits. */
#define R_PARISC_LTOFF_FPTR32 57 /* 32 bits LT-rel. function pointer. */
#define R_PARISC_LTOFF_FPTR21L 58 /* LT-rel. fct ptr, left 21 bits. */
#define R_PARISC_LTOFF_FPTR14R 62 /* LT-rel. fct ptr, right 14 bits. */
#define R_PARISC_FPTR64 64 /* 64 bits function address. */
#define R_PARISC_PLABEL32 65 /* 32 bits function address. */
#define R_PARISC_PCREL64 72 /* 64 bits PC-rel. address. */
#define R_PARISC_PCREL22F 74 /* 22 bits PC-rel. address. */
#define R_PARISC_PCREL14WR 75 /* PC-rel. address, right 14 bits. */
#define R_PARISC_PCREL14DR 76 /* PC rel. address, right 14 bits. */
#define R_PARISC_PCREL16F 77 /* 16 bits PC-rel. address. */
#define R_PARISC_PCREL16WF 78 /* 16 bits PC-rel. address. */
#define R_PARISC_PCREL16DF 79 /* 16 bits PC-rel. address. */
#define R_PARISC_DIR64 80 /* 64 bits of eff. address. */
#define R_PARISC_DIR14WR 83 /* 14 bits of eff. address. */
#define R_PARISC_DIR14DR 84 /* 14 bits of eff. address. */
#define R_PARISC_DIR16F 85 /* 16 bits of eff. address. */
#define R_PARISC_DIR16WF 86 /* 16 bits of eff. address. */
#define R_PARISC_DIR16DF 87 /* 16 bits of eff. address. */
#define R_PARISC_GPREL64 88 /* 64 bits of GP-rel. address. */
#define R_PARISC_GPREL14WR 91 /* GP-rel. address, right 14 bits. */
#define R_PARISC_GPREL14DR 92 /* GP-rel. address, right 14 bits. */
#define R_PARISC_GPREL16F 93 /* 16 bits GP-rel. address. */
#define R_PARISC_GPREL16WF 94 /* 16 bits GP-rel. address. */
#define R_PARISC_GPREL16DF 95 /* 16 bits GP-rel. address. */
#define R_PARISC_LTOFF64 96 /* 64 bits LT-rel. address. */
#define R_PARISC_LTOFF14WR 99 /* LT-rel. address, right 14 bits. */
#define R_PARISC_LTOFF14DR 100 /* LT-rel. address, right 14 bits. */
#define R_PARISC_LTOFF16F 101 /* 16 bits LT-rel. address. */
#define R_PARISC_LTOFF16WF 102 /* 16 bits LT-rel. address. */
#define R_PARISC_LTOFF16DF 103 /* 16 bits LT-rel. address. */
#define R_PARISC_SECREL64 104 /* 64 bits section rel. address. */
#define R_PARISC_SEGREL64 112 /* 64 bits segment rel. address. */
#define R_PARISC_PLTOFF14WR 115 /* PLT-rel. address, right 14 bits. */
#define R_PARISC_PLTOFF14DR 116 /* PLT-rel. address, right 14 bits. */
#define R_PARISC_PLTOFF16F 117 /* 16 bits LT-rel. address. */
#define R_PARISC_PLTOFF16WF 118 /* 16 bits PLT-rel. address. */
#define R_PARISC_PLTOFF16DF 119 /* 16 bits PLT-rel. address. */
#define R_PARISC_LTOFF_FPTR64 120 /* 64 bits LT-rel. function ptr. */
#define R_PARISC_LTOFF_FPTR14WR 123 /* LT-rel. fct. ptr., right 14 bits. */
#define R_PARISC_LTOFF_FPTR14DR 124 /* LT-rel. fct. ptr., right 14 bits. */
#define R_PARISC_LTOFF_FPTR16F 125 /* 16 bits LT-rel. function ptr. */
#define R_PARISC_LTOFF_FPTR16WF 126 /* 16 bits LT-rel. function ptr. */
#define R_PARISC_LTOFF_FPTR16DF 127 /* 16 bits LT-rel. function ptr. */
#define R_PARISC_LORESERVE 128
#define R_PARISC_COPY 128 /* Copy relocation. */
#define R_PARISC_IPLT 129 /* Dynamic reloc, imported PLT */
#define R_PARISC_EPLT 130 /* Dynamic reloc, exported PLT */
#define R_PARISC_TPREL32 153 /* 32 bits TP-rel. address. */
#define R_PARISC_TPREL21L 154 /* TP-rel. address, left 21 bits. */
#define R_PARISC_TPREL14R 158 /* TP-rel. address, right 14 bits. */
#define R_PARISC_LTOFF_TP21L 162 /* LT-TP-rel. address, left 21 bits. */
#define R_PARISC_LTOFF_TP14R 166 /* LT-TP-rel. address, right 14 bits.*/
#define R_PARISC_LTOFF_TP14F 167 /* 14 bits LT-TP-rel. address. */
#define R_PARISC_TPREL64 216 /* 64 bits TP-rel. address. */
#define R_PARISC_TPREL14WR 219 /* TP-rel. address, right 14 bits. */
#define R_PARISC_TPREL14DR 220 /* TP-rel. address, right 14 bits. */
#define R_PARISC_TPREL16F 221 /* 16 bits TP-rel. address. */
#define R_PARISC_TPREL16WF 222 /* 16 bits TP-rel. address. */
#define R_PARISC_TPREL16DF 223 /* 16 bits TP-rel. address. */
#define R_PARISC_LTOFF_TP64 224 /* 64 bits LT-TP-rel. address. */
#define R_PARISC_LTOFF_TP14WR 227 /* LT-TP-rel. address, right 14 bits.*/
#define R_PARISC_LTOFF_TP14DR 228 /* LT-TP-rel. address, right 14 bits.*/
#define R_PARISC_LTOFF_TP16F 229 /* 16 bits LT-TP-rel. address. */
#define R_PARISC_LTOFF_TP16WF 230 /* 16 bits LT-TP-rel. address. */
#define R_PARISC_LTOFF_TP16DF 231 /* 16 bits LT-TP-rel. address. */
#define R_PARISC_HIRESERVE 255
/* Legal values for p_type field of Elf32_Phdr/Elf64_Phdr. */
#define PT_HP_TLS (PT_LOOS + 0x0)
#define PT_HP_CORE_NONE (PT_LOOS + 0x1)
#define PT_HP_CORE_VERSION (PT_LOOS + 0x2)
#define PT_HP_CORE_KERNEL (PT_LOOS + 0x3)
#define PT_HP_CORE_COMM (PT_LOOS + 0x4)
#define PT_HP_CORE_PROC (PT_LOOS + 0x5)
#define PT_HP_CORE_LOADABLE (PT_LOOS + 0x6)
#define PT_HP_CORE_STACK (PT_LOOS + 0x7)
#define PT_HP_CORE_SHM (PT_LOOS + 0x8)
#define PT_HP_CORE_MMF (PT_LOOS + 0x9)
#define PT_HP_PARALLEL (PT_LOOS + 0x10)
#define PT_HP_FASTBIND (PT_LOOS + 0x11)
#define PT_HP_OPT_ANNOT (PT_LOOS + 0x12)
#define PT_HP_HSL_ANNOT (PT_LOOS + 0x13)
#define PT_HP_STACK (PT_LOOS + 0x14)
#define PT_PARISC_ARCHEXT 0x70000000
#define PT_PARISC_UNWIND 0x70000001
/* Legal values for p_flags field of Elf32_Phdr/Elf64_Phdr. */
#define PF_PARISC_SBP 0x08000000
#define PF_HP_PAGE_SIZE 0x00100000
#define PF_HP_FAR_SHARED 0x00200000
#define PF_HP_NEAR_SHARED 0x00400000
#define PF_HP_CODE 0x01000000
#define PF_HP_MODIFY 0x02000000
#define PF_HP_LAZYSWAP 0x04000000
#define PF_HP_SBP 0x08000000
/* IA-64 specific declarations. */
/* Processor specific flags for the Ehdr e_flags field. */
#define EF_IA_64_MASKOS 0x0000000f /* os-specific flags */
#define EF_IA_64_ABI64 0x00000010 /* 64-bit ABI */
#define EF_IA_64_ARCH 0xff000000 /* arch. version mask */
/* Processor specific values for the Phdr p_type field. */
#define PT_IA_64_ARCHEXT (PT_LOPROC + 0) /* arch extension bits */
#define PT_IA_64_UNWIND (PT_LOPROC + 1) /* ia64 unwind bits */
/* Processor specific flags for the Phdr p_flags field. */
#define PF_IA_64_NORECOV 0x80000000 /* spec insns w/o recovery */
/* Processor specific values for the Shdr sh_type field. */
#define SHT_IA_64_EXT (SHT_LOPROC + 0) /* extension bits */
#define SHT_IA_64_UNWIND (SHT_LOPROC + 1) /* unwind bits */
/* Processor specific flags for the Shdr sh_flags field. */
#define SHF_IA_64_SHORT 0x10000000 /* section near gp */
#define SHF_IA_64_NORECOV 0x20000000 /* spec insns w/o recovery */
/* Processor specific values for the Dyn d_tag field. */
#define DT_IA_64_PLT_RESERVE (DT_LOPROC + 0)
#define DT_IA_64_NUM 1
/* IA-64 relocations. */
#define R_IA64_NONE 0x00 /* none */
#define R_IA64_IMM14 0x21 /* symbol + addend, add imm14 */
#define R_IA64_IMM22 0x22 /* symbol + addend, add imm22 */
#define R_IA64_IMM64 0x23 /* symbol + addend, mov imm64 */
#define R_IA64_DIR32MSB 0x24 /* symbol + addend, data4 MSB */
#define R_IA64_DIR32LSB 0x25 /* symbol + addend, data4 LSB */
#define R_IA64_DIR64MSB 0x26 /* symbol + addend, data8 MSB */
#define R_IA64_DIR64LSB 0x27 /* symbol + addend, data8 LSB */
#define R_IA64_GPREL22 0x2a /* @gprel(sym + add), add imm22 */
#define R_IA64_GPREL64I 0x2b /* @gprel(sym + add), mov imm64 */
#define R_IA64_GPREL32MSB 0x2c /* @gprel(sym + add), data4 MSB */
#define R_IA64_GPREL32LSB 0x2d /* @gprel(sym + add), data4 LSB */
#define R_IA64_GPREL64MSB 0x2e /* @gprel(sym + add), data8 MSB */
#define R_IA64_GPREL64LSB 0x2f /* @gprel(sym + add), data8 LSB */
#define R_IA64_LTOFF22 0x32 /* @ltoff(sym + add), add imm22 */
#define R_IA64_LTOFF64I 0x33 /* @ltoff(sym + add), mov imm64 */
#define R_IA64_PLTOFF22 0x3a /* @pltoff(sym + add), add imm22 */
#define R_IA64_PLTOFF64I 0x3b /* @pltoff(sym + add), mov imm64 */
#define R_IA64_PLTOFF64MSB 0x3e /* @pltoff(sym + add), data8 MSB */
#define R_IA64_PLTOFF64LSB 0x3f /* @pltoff(sym + add), data8 LSB */
#define R_IA64_FPTR64I 0x43 /* @fptr(sym + add), mov imm64 */
#define R_IA64_FPTR32MSB 0x44 /* @fptr(sym + add), data4 MSB */
#define R_IA64_FPTR32LSB 0x45 /* @fptr(sym + add), data4 LSB */
#define R_IA64_FPTR64MSB 0x46 /* @fptr(sym + add), data8 MSB */
#define R_IA64_FPTR64LSB 0x47 /* @fptr(sym + add), data8 LSB */
#define R_IA64_PCREL60B 0x48 /* @pcrel(sym + add), brl */
#define R_IA64_PCREL21B 0x49 /* @pcrel(sym + add), ptb, call */
#define R_IA64_PCREL21M 0x4a /* @pcrel(sym + add), chk.s */
#define R_IA64_PCREL21F 0x4b /* @pcrel(sym + add), fchkf */
#define R_IA64_PCREL32MSB 0x4c /* @pcrel(sym + add), data4 MSB */
#define R_IA64_PCREL32LSB 0x4d /* @pcrel(sym + add), data4 LSB */
#define R_IA64_PCREL64MSB 0x4e /* @pcrel(sym + add), data8 MSB */
#define R_IA64_PCREL64LSB 0x4f /* @pcrel(sym + add), data8 LSB */
#define R_IA64_LTOFF_FPTR22 0x52 /* @ltoff(@fptr(s+a)), imm22 */
#define R_IA64_LTOFF_FPTR64I 0x53 /* @ltoff(@fptr(s+a)), imm64 */
#define R_IA64_LTOFF_FPTR32MSB 0x54 /* @ltoff(@fptr(s+a)), data4 MSB */
#define R_IA64_LTOFF_FPTR32LSB 0x55 /* @ltoff(@fptr(s+a)), data4 LSB */
#define R_IA64_LTOFF_FPTR64MSB 0x56 /* @ltoff(@fptr(s+a)), data8 MSB */
#define R_IA64_LTOFF_FPTR64LSB 0x57 /* @ltoff(@fptr(s+a)), data8 LSB */
#define R_IA64_SEGREL32MSB 0x5c /* @segrel(sym + add), data4 MSB */
#define R_IA64_SEGREL32LSB 0x5d /* @segrel(sym + add), data4 LSB */
#define R_IA64_SEGREL64MSB 0x5e /* @segrel(sym + add), data8 MSB */
#define R_IA64_SEGREL64LSB 0x5f /* @segrel(sym + add), data8 LSB */
#define R_IA64_SECREL32MSB 0x64 /* @secrel(sym + add), data4 MSB */
#define R_IA64_SECREL32LSB 0x65 /* @secrel(sym + add), data4 LSB */
#define R_IA64_SECREL64MSB 0x66 /* @secrel(sym + add), data8 MSB */
#define R_IA64_SECREL64LSB 0x67 /* @secrel(sym + add), data8 LSB */
#define R_IA64_REL32MSB 0x6c /* data 4 + REL */
#define R_IA64_REL32LSB 0x6d /* data 4 + REL */
#define R_IA64_REL64MSB 0x6e /* data 8 + REL */
#define R_IA64_REL64LSB 0x6f /* data 8 + REL */
#define R_IA64_LTV32MSB 0x74 /* symbol + addend, data4 MSB */
#define R_IA64_LTV32LSB 0x75 /* symbol + addend, data4 LSB */
#define R_IA64_LTV64MSB 0x76 /* symbol + addend, data8 MSB */
#define R_IA64_LTV64LSB 0x77 /* symbol + addend, data8 LSB */
#define R_IA64_PCREL21BI 0x79 /* @pcrel(sym + add), 21bit inst */
#define R_IA64_PCREL22 0x7a /* @pcrel(sym + add), 22bit inst */
#define R_IA64_PCREL64I 0x7b /* @pcrel(sym + add), 64bit inst */
#define R_IA64_IPLTMSB 0x80 /* dynamic reloc, imported PLT, MSB */
#define R_IA64_IPLTLSB 0x81 /* dynamic reloc, imported PLT, LSB */
#define R_IA64_COPY 0x84 /* copy relocation */
#define R_IA64_SUB 0x85 /* Addend and symbol difference */
#define R_IA64_LTOFF22X 0x86 /* LTOFF22, relaxable. */
#define R_IA64_LDXMOV 0x87 /* Use of LTOFF22X. */
#define R_IA64_TPREL14 0x91 /* @tprel(sym + add), imm14 */
#define R_IA64_TPREL22 0x92 /* @tprel(sym + add), imm22 */
#define R_IA64_TPREL64I 0x93 /* @tprel(sym + add), imm64 */
#define R_IA64_TPREL64MSB 0x96 /* @tprel(sym + add), data8 MSB */
#define R_IA64_TPREL64LSB 0x97 /* @tprel(sym + add), data8 LSB */
#define R_IA64_LTOFF_TPREL22 0x9a /* @ltoff(@tprel(s+a)), imm2 */
#define R_IA64_DTPMOD64MSB 0xa6 /* @dtpmod(sym + add), data8 MSB */
#define R_IA64_DTPMOD64LSB 0xa7 /* @dtpmod(sym + add), data8 LSB */
#define R_IA64_LTOFF_DTPMOD22 0xaa /* @ltoff(@dtpmod(sym + add)), imm22 */
#define R_IA64_DTPREL14 0xb1 /* @dtprel(sym + add), imm14 */
#define R_IA64_DTPREL22 0xb2 /* @dtprel(sym + add), imm22 */
#define R_IA64_DTPREL64I 0xb3 /* @dtprel(sym + add), imm64 */
#define R_IA64_DTPREL32MSB 0xb4 /* @dtprel(sym + add), data4 MSB */
#define R_IA64_DTPREL32LSB 0xb5 /* @dtprel(sym + add), data4 LSB */
#define R_IA64_DTPREL64MSB 0xb6 /* @dtprel(sym + add), data8 MSB */
#define R_IA64_DTPREL64LSB 0xb7 /* @dtprel(sym + add), data8 LSB */
#define R_IA64_LTOFF_DTPREL22 0xba /* @ltoff(@dtprel(s+a)), imm22 */
typedef struct elf32_rel {
Elf32_Addr r_offset;
Elf32_Word r_info;
} Elf32_Rel;
typedef struct elf64_rel {
Elf64_Addr r_offset; /* Location at which to apply the action */
Elf64_Xword r_info; /* index and type of relocation */
} Elf64_Rel;
typedef struct elf32_rela{
Elf32_Addr r_offset;
Elf32_Word r_info;
Elf32_Sword r_addend;
} Elf32_Rela;
typedef struct elf64_rela {
Elf64_Addr r_offset; /* Location at which to apply the action */
Elf64_Xword r_info; /* index and type of relocation */
Elf64_Sxword r_addend; /* Constant addend used to compute value */
} Elf64_Rela;
typedef struct elf32_sym{
Elf32_Word st_name;
Elf32_Addr st_value;
Elf32_Word st_size;
unsigned char st_info;
unsigned char st_other;
Elf32_Half st_shndx;
} Elf32_Sym;
typedef struct elf64_sym {
Elf64_Word st_name; /* Symbol name, index in string tbl */
unsigned char st_info; /* Type and binding attributes */
unsigned char st_other; /* No defined meaning, 0 */
Elf64_Half st_shndx; /* Associated section index */
Elf64_Addr st_value; /* Value of the symbol */
Elf64_Xword st_size; /* Associated symbol size */
} Elf64_Sym;
#define EI_NIDENT 16
typedef struct elf32_hdr{
unsigned char e_ident[EI_NIDENT];
Elf32_Half e_type;
Elf32_Half e_machine;
Elf32_Word e_version;
Elf32_Addr e_entry; /* Entry point */
Elf32_Off e_phoff;
Elf32_Off e_shoff;
Elf32_Word e_flags;
Elf32_Half e_ehsize;
Elf32_Half e_phentsize;
Elf32_Half e_phnum;
Elf32_Half e_shentsize;
Elf32_Half e_shnum;
Elf32_Half e_shstrndx;
} Elf32_Ehdr;
typedef struct elf64_hdr {
unsigned char e_ident[16]; /* ELF "magic number" */
Elf64_Half e_type;
Elf64_Half e_machine;
Elf64_Word e_version;
Elf64_Addr e_entry; /* Entry point virtual address */
Elf64_Off e_phoff; /* Program header table file offset */
Elf64_Off e_shoff; /* Section header table file offset */
Elf64_Word e_flags;
Elf64_Half e_ehsize;
Elf64_Half e_phentsize;
Elf64_Half e_phnum;
Elf64_Half e_shentsize;
Elf64_Half e_shnum;
Elf64_Half e_shstrndx;
} Elf64_Ehdr;
/* These constants define the permissions on sections in the program
header, p_flags. */
#define PF_R 0x4
#define PF_W 0x2
#define PF_X 0x1
typedef struct elf32_phdr{
Elf32_Word p_type;
Elf32_Off p_offset;
Elf32_Addr p_vaddr;
Elf32_Addr p_paddr;
Elf32_Word p_filesz;
Elf32_Word p_memsz;
Elf32_Word p_flags;
Elf32_Word p_align;
} Elf32_Phdr;
typedef struct elf64_phdr {
Elf64_Word p_type;
Elf64_Word p_flags;
Elf64_Off p_offset; /* Segment file offset */
Elf64_Addr p_vaddr; /* Segment virtual address */
Elf64_Addr p_paddr; /* Segment physical address */
Elf64_Xword p_filesz; /* Segment size in file */
Elf64_Xword p_memsz; /* Segment size in memory */
Elf64_Xword p_align; /* Segment alignment, file & memory */
} Elf64_Phdr;
/* sh_type */
#define SHT_NULL 0
#define SHT_PROGBITS 1
#define SHT_SYMTAB 2
#define SHT_STRTAB 3
#define SHT_RELA 4
#define SHT_HASH 5
#define SHT_DYNAMIC 6
#define SHT_NOTE 7
#define SHT_NOBITS 8
#define SHT_REL 9
#define SHT_SHLIB 10
#define SHT_DYNSYM 11
#define SHT_NUM 12
#define SHT_LOPROC 0x70000000
#define SHT_HIPROC 0x7fffffff
#define SHT_LOUSER 0x80000000
#define SHT_HIUSER 0xffffffff
#define SHT_MIPS_LIST 0x70000000
#define SHT_MIPS_CONFLICT 0x70000002
#define SHT_MIPS_GPTAB 0x70000003
#define SHT_MIPS_UCODE 0x70000004
/* sh_flags */
#define SHF_WRITE 0x1
#define SHF_ALLOC 0x2
#define SHF_EXECINSTR 0x4
#define SHF_MASKPROC 0xf0000000
#define SHF_MIPS_GPREL 0x10000000
/* special section indexes */
#define SHN_UNDEF 0
#define SHN_LORESERVE 0xff00
#define SHN_LOPROC 0xff00
#define SHN_HIPROC 0xff1f
#define SHN_ABS 0xfff1
#define SHN_COMMON 0xfff2
#define SHN_HIRESERVE 0xffff
#define SHN_MIPS_ACCOMON 0xff00
typedef struct elf32_shdr {
Elf32_Word sh_name;
Elf32_Word sh_type;
Elf32_Word sh_flags;
Elf32_Addr sh_addr;
Elf32_Off sh_offset;
Elf32_Word sh_size;
Elf32_Word sh_link;
Elf32_Word sh_info;
Elf32_Word sh_addralign;
Elf32_Word sh_entsize;
} Elf32_Shdr;
typedef struct elf64_shdr {
Elf64_Word sh_name; /* Section name, index in string tbl */
Elf64_Word sh_type; /* Type of section */
Elf64_Xword sh_flags; /* Miscellaneous section attributes */
Elf64_Addr sh_addr; /* Section virtual addr at execution */
Elf64_Off sh_offset; /* Section file offset */
Elf64_Xword sh_size; /* Size of section in bytes */
Elf64_Word sh_link; /* Index of another section */
Elf64_Word sh_info; /* Additional section information */
Elf64_Xword sh_addralign; /* Section alignment */
Elf64_Xword sh_entsize; /* Entry size if section holds table */
} Elf64_Shdr;
#define EI_MAG0 0 /* e_ident[] indexes */
#define EI_MAG1 1
#define EI_MAG2 2
#define EI_MAG3 3
#define EI_CLASS 4
#define EI_DATA 5
#define EI_VERSION 6
#define EI_PAD 7
#define ELFMAG0 0x7f /* EI_MAG */
#define ELFMAG1 'E'
#define ELFMAG2 'L'
#define ELFMAG3 'F'
#define ELFMAG "177ELF"
#define SELFMAG 4
#define ELFCLASSNONE 0 /* EI_CLASS */
#define ELFCLASS32 1
#define ELFCLASS64 2
#define ELFCLASSNUM 3
#define ELFDATANONE 0 /* e_ident[EI_DATA] */
#define ELFDATA2LSB 1
#define ELFDATA2MSB 2
#define EV_NONE 0 /* e_version, EI_VERSION */
#define EV_CURRENT 1
#define EV_NUM 2
/* Notes used in ET_CORE */
#define NT_PRSTATUS 1
#define NT_PRFPREG 2
#define NT_PRPSINFO 3
#define NT_TASKSTRUCT 4
#define NT_PRXFPREG 0x46e62b7f /* copied from gdb5.1/include/elf/common.h */
/* Note header in a PT_NOTE section */
typedef struct elf32_note {
Elf32_Word n_namesz; /* Name size */
Elf32_Word n_descsz; /* Content size */
Elf32_Word n_type; /* Content type */
} Elf32_Nhdr;
/* Note header in a PT_NOTE section */
typedef struct elf64_note {
Elf64_Word n_namesz; /* Name size */
Elf64_Word n_descsz; /* Content size */
Elf64_Word n_type; /* Content type */
} Elf64_Nhdr;
#if ELF_CLASS == ELFCLASS32
#define elfhdr elf32_hdr
#define elf_phdr elf32_phdr
#define elf_note elf32_note
#define elf_shdr elf32_shdr
#define elf_sym elf32_sym
#define elf_addr_t Elf32_Off
#ifdef ELF_USES_RELOCA
# define ELF_RELOC Elf32_Rela
#else
# define ELF_RELOC Elf32_Rel
#endif
#else
#define elfhdr elf64_hdr
#define elf_phdr elf64_phdr
#define elf_note elf64_note
#define elf_shdr elf64_shdr
#define elf_sym elf64_sym
#define elf_addr_t Elf64_Off
#ifdef ELF_USES_RELOCA
# define ELF_RELOC Elf64_Rela
#else
# define ELF_RELOC Elf64_Rel
#endif
#endif /* ELF_CLASS */
#ifndef ElfW
# if ELF_CLASS == ELFCLASS32
# define ElfW(x) Elf32_ ## x
# define ELFW(x) ELF32_ ## x
# else
# define ElfW(x) Elf64_ ## x
# define ELFW(x) ELF64_ ## x
# endif
#endif
#endif /* _QEMU_ELF_H */头文件 fix.h 的代码如下：
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "elf.h"
#define SHDRS 16
/*
.dynsym .dynstr .hash .rel.dyn .rel.plt
.plt .text .ARM.extab .ARM.exidx .fini_array
.init_array .dynamic .got .data
*/
#define NONE 0
#define DYNSYM 1
#define DYNSTR 2
#define HASH 3
#define RELDYN 4
#define RELPLT 5
#define PLT 6
#define TEXT 7
#define ARMEXIDX 8
#define FINIARRAY 9
#define INITARRAY 10
#define DYNAMIC 11
#define GOT 12
#define DATA 13
#define BSS 14
#define STRTAB 15
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前言 Hello!小伙伴! 首先非常感谢您阅读海轰的文章,倘若文中有错误的地方,欢迎您指出- 哈哈 自我介绍一下 昵称:海轰 标签:程序猿一只|C++选手|学生 简介:因C语言结识编程,随后转入计算机 ...