generic-library/bionic
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Ignore DT_BIND_NOW (0x18)

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Bug: 18186310
Bug: 17552334

(cherry picked from commit ea6eae182ad64312f80b9adddac511d8938e23e7)

Change-Id: I07d6f6fbb462fea329581d0da02f6d88be1c262f
This commit is contained in:
Dmitriy Ivanov 2014-10-15 14:59:01 -07:00
parent 1d3e81a9e7
commit e4bc6f026a
1 changed files with 42 additions and 7 deletions
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49
linker/linker.cpp
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@ -1915,27 +1915,33 @@ bool soinfo::PrelinkImage() {
// TODO: glibc dynamic linker uses this name for
// initial library lookup; consider doing the same here.
break;
case DT_HASH:
nbucket = reinterpret_cast<uint32_t*>(load_bias + d->d_un.d_ptr)[0];
nchain = reinterpret_cast<uint32_t*>(load_bias + d->d_un.d_ptr)[1];
bucket = reinterpret_cast<uint32_t*>(load_bias + d->d_un.d_ptr + 8);
chain = reinterpret_cast<uint32_t*>(load_bias + d->d_un.d_ptr + 8 + nbucket * 4);
break;
case DT_STRTAB:
strtab = reinterpret_cast<const char*>(load_bias + d->d_un.d_ptr);
break;
case DT_STRSZ:
strtab_size = d->d_un.d_val;
break;
case DT_SYMTAB:
symtab = reinterpret_cast<ElfW(Sym)*>(load_bias + d->d_un.d_ptr);
break;
case DT_SYMENT:
if (d->d_un.d_val != sizeof(ElfW(Sym))) {
DL_ERR("invalid DT_SYMENT: %zd", static_cast<size_t>(d->d_un.d_val));
return false;
}
break;
case DT_PLTREL:
#if defined(USE_RELA)
if (d->d_un.d_val != DT_RELA) {
@ -1949,6 +1955,7 @@ bool soinfo::PrelinkImage() {
}
#endif
break;
case DT_JMPREL:
#if defined(USE_RELA)
plt_rela = reinterpret_cast<ElfW(Rela)*>(load_bias + d->d_un.d_ptr);
@ -1956,6 +1963,7 @@ bool soinfo::PrelinkImage() {
plt_rel = reinterpret_cast<ElfW(Rel)*>(load_bias + d->d_un.d_ptr);
#endif
break;
case DT_PLTRELSZ:
#if defined(USE_RELA)
plt_rela_count = d->d_un.d_val / sizeof(ElfW(Rela));
@ -1963,6 +1971,7 @@ bool soinfo::PrelinkImage() {
plt_rel_count = d->d_un.d_val / sizeof(ElfW(Rel));
#endif
break;
case DT_PLTGOT:
#if defined(__mips__)
// Used by mips and mips64.
@ -1970,6 +1979,7 @@ bool soinfo::PrelinkImage() {
#endif
// Ignore for other platforms... (because RTLD_LAZY is not supported)
break;
case DT_DEBUG:
// Set the DT_DEBUG entry to the address of _r_debug for GDB
// if the dynamic table is writable
@ -1987,21 +1997,26 @@ bool soinfo::PrelinkImage() {
case DT_RELA:
rela = reinterpret_cast<ElfW(Rela)*>(load_bias + d->d_un.d_ptr);
break;
case DT_RELASZ:
rela_count = d->d_un.d_val / sizeof(ElfW(Rela));
break;
case DT_RELAENT:
if (d->d_un.d_val != sizeof(ElfW(Rela))) {
DL_ERR("invalid DT_RELAENT: %zd", static_cast<size_t>(d->d_un.d_val));
return false;
}
break;
// ignored (see DT_RELCOUNT comments for details)
case DT_RELACOUNT:
// ignored (see DT_RELCOUNT comments for details)
break;
case DT_REL:
DL_ERR("unsupported DT_REL in \"%s\"", name);
return false;
case DT_RELSZ:
DL_ERR("unsupported DT_RELSZ in \"%s\"", name);
return false;
@ -2009,21 +2024,24 @@ bool soinfo::PrelinkImage() {
case DT_REL:
rel = reinterpret_cast<ElfW(Rel)*>(load_bias + d->d_un.d_ptr);
break;
case DT_RELSZ:
rel_count = d->d_un.d_val / sizeof(ElfW(Rel));
break;
case DT_RELENT:
if (d->d_un.d_val != sizeof(ElfW(Rel))) {
DL_ERR("invalid DT_RELENT: %zd", static_cast<size_t>(d->d_un.d_val));
return false;
}
break;
// "Indicates that all RELATIVE relocations have been concatenated together,
// and specifies the RELATIVE relocation count."
//
// TODO: Spec also mentions that this can be used to optimize relocation process;
// Not currently used by bionic linker - ignored.
case DT_RELCOUNT:
// "Indicates that all RELATIVE relocations have been concatenated together,
// and specifies the RELATIVE relocation count."
//
// TODO: Spec also mentions that this can be used to optimize relocation process;
// Not currently used by bionic linker - ignored.
break;
case DT_RELA:
DL_ERR("unsupported DT_RELA in \"%s\"", name);
@ -2033,31 +2051,39 @@ bool soinfo::PrelinkImage() {
init_func = reinterpret_cast<linker_function_t>(load_bias + d->d_un.d_ptr);
DEBUG("%s constructors (DT_INIT) found at %p", name, init_func);
break;
case DT_FINI:
fini_func = reinterpret_cast<linker_function_t>(load_bias + d->d_un.d_ptr);
DEBUG("%s destructors (DT_FINI) found at %p", name, fini_func);
break;
case DT_INIT_ARRAY:
init_array = reinterpret_cast<linker_function_t*>(load_bias + d->d_un.d_ptr);
DEBUG("%s constructors (DT_INIT_ARRAY) found at %p", name, init_array);
break;
case DT_INIT_ARRAYSZ:
init_array_count = ((unsigned)d->d_un.d_val) / sizeof(ElfW(Addr));
break;
case DT_FINI_ARRAY:
fini_array = reinterpret_cast<linker_function_t*>(load_bias + d->d_un.d_ptr);
DEBUG("%s destructors (DT_FINI_ARRAY) found at %p", name, fini_array);
break;
case DT_FINI_ARRAYSZ:
fini_array_count = ((unsigned)d->d_un.d_val) / sizeof(ElfW(Addr));
break;
case DT_PREINIT_ARRAY:
preinit_array = reinterpret_cast<linker_function_t*>(load_bias + d->d_un.d_ptr);
DEBUG("%s constructors (DT_PREINIT_ARRAY) found at %p", name, preinit_array);
break;
case DT_PREINIT_ARRAYSZ:
preinit_array_count = ((unsigned)d->d_un.d_val) / sizeof(ElfW(Addr));
break;
case DT_TEXTREL:
#if defined(__LP64__)
DL_ERR("text relocations (DT_TEXTREL) found in 64-bit ELF file \"%s\"", name);
@ -2066,12 +2092,15 @@ bool soinfo::PrelinkImage() {
has_text_relocations = true;
break;
#endif
case DT_SYMBOLIC:
has_DT_SYMBOLIC = true;
break;
case DT_NEEDED:
++needed_count;
break;
case DT_FLAGS:
if (d->d_un.d_val & DF_TEXTREL) {
#if defined(__LP64__)
@ -2085,6 +2114,7 @@ bool soinfo::PrelinkImage() {
has_DT_SYMBOLIC = true;
}
break;
case DT_FLAGS_1:
if ((d->d_un.d_val & DF_1_GLOBAL) != 0) {
rtld_flags |= RTLD_GLOBAL;
@ -2107,6 +2137,7 @@ bool soinfo::PrelinkImage() {
*dp = &_r_debug;
}
break;
case DT_MIPS_RLD_VERSION:
case DT_MIPS_FLAGS:
case DT_MIPS_BASE_ADDRESS:
@ -2125,10 +2156,14 @@ bool soinfo::PrelinkImage() {
mips_gotsym = d->d_un.d_val;
break;
#endif
// Ignored: "Its use has been superseded by the DF_BIND_NOW flag"
case DT_BIND_NOW:
break;
// Ignore: bionic does not support symbol versioning...
case DT_VERSYM:
case DT_VERDEF:
case DT_VERDEFNUM:
// Ignore: bionic does not support symbol versioning...
break;
default: