diff options
Diffstat (limited to 'runtime/elf_utils.h')
| -rw-r--r-- | runtime/elf_utils.h | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/runtime/elf_utils.h b/runtime/elf_utils.h index 2c50047825..5966d05996 100644 --- a/runtime/elf_utils.h +++ b/runtime/elf_utils.h @@ -22,6 +22,8 @@ // Explicitly include our own elf.h to avoid Linux and other dependencies. #include "./elf.h" +#include "base/logging.h" + // Architecture dependent flags for the ELF header. #define EF_ARM_EABI_VER5 0x05000000 #define EF_MIPS_ABI_O32 0x00001000 @@ -62,8 +64,103 @@ #define DT_MIPS_HIPAGENO 0x70000014 /* Number of GOT page table entries */ #define DT_MIPS_RLD_MAP 0x70000016 /* Address of debug map pointer */ +// Patching section type +#define SHT_OAT_PATCH SHT_LOUSER + inline void SetBindingAndType(Elf32_Sym* sym, unsigned char b, unsigned char t) { sym->st_info = (b << 4) + (t & 0x0f); } +inline bool IsDynamicSectionPointer(Elf32_Word d_tag, Elf32_Word e_machine) { + switch (d_tag) { + // case 1: well known d_tag values that imply Elf32_Dyn.d_un contains an address in d_ptr + case DT_PLTGOT: + case DT_HASH: + case DT_STRTAB: + case DT_SYMTAB: + case DT_RELA: + case DT_INIT: + case DT_FINI: + case DT_REL: + case DT_DEBUG: + case DT_JMPREL: { + return true; + } + // d_val or ignored values + case DT_NULL: + case DT_NEEDED: + case DT_PLTRELSZ: + case DT_RELASZ: + case DT_RELAENT: + case DT_STRSZ: + case DT_SYMENT: + case DT_SONAME: + case DT_RPATH: + case DT_SYMBOLIC: + case DT_RELSZ: + case DT_RELENT: + case DT_PLTREL: + case DT_TEXTREL: + case DT_BIND_NOW: + case DT_INIT_ARRAYSZ: + case DT_FINI_ARRAYSZ: + case DT_RUNPATH: + case DT_FLAGS: { + return false; + } + // boundary values that should not be used + case DT_ENCODING: + case DT_LOOS: + case DT_HIOS: + case DT_LOPROC: + case DT_HIPROC: { + LOG(FATAL) << "Illegal d_tag value 0x" << std::hex << d_tag; + return false; + } + default: { + // case 2: "regular" DT_* ranges where even d_tag values imply an address in d_ptr + if ((DT_ENCODING < d_tag && d_tag < DT_LOOS) + || (DT_LOOS < d_tag && d_tag < DT_HIOS) + || (DT_LOPROC < d_tag && d_tag < DT_HIPROC)) { + // Special case for MIPS which breaks the regular rules between DT_LOPROC and DT_HIPROC + if (e_machine == EM_MIPS) { + switch (d_tag) { + case DT_MIPS_RLD_VERSION: + case DT_MIPS_TIME_STAMP: + case DT_MIPS_ICHECKSUM: + case DT_MIPS_IVERSION: + case DT_MIPS_FLAGS: + case DT_MIPS_LOCAL_GOTNO: + case DT_MIPS_CONFLICTNO: + case DT_MIPS_LIBLISTNO: + case DT_MIPS_SYMTABNO: + case DT_MIPS_UNREFEXTNO: + case DT_MIPS_GOTSYM: + case DT_MIPS_HIPAGENO: { + return false; + } + case DT_MIPS_BASE_ADDRESS: + case DT_MIPS_CONFLICT: + case DT_MIPS_LIBLIST: + case DT_MIPS_RLD_MAP: { + return true; + } + default: { + LOG(FATAL) << "Unknown MIPS d_tag value 0x" << std::hex << d_tag; + return false; + } + } + } else if ((d_tag % 2) == 0) { + return true; + } else { + return false; + } + } else { + LOG(FATAL) << "Unknown d_tag value 0x" << std::hex << d_tag; + return false; + } + } + } +} + #endif // ART_RUNTIME_ELF_UTILS_H_ |