#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/ADT/Triple.h"
-#include "llvm/Object/ELF_ARM.h"
#include "llvm/Object/ObjectFile.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/ELF.h"
#include "llvm/Support/Endian.h"
#include "llvm/Support/ErrorHandling.h"
-#include "llvm/Support/LEB128.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/raw_ostream.h"
#include <algorithm>
const Elf_Shdr *dot_gnu_version_sec; // .gnu.version
const Elf_Shdr *dot_gnu_version_r_sec; // .gnu.version_r
const Elf_Shdr *dot_gnu_version_d_sec; // .gnu.version_d
- const Elf_Shdr *dot_arm_attributes_sec; // .ARM.attributes
// Pointer to SONAME entry in dynamic string table
// This is set the first time getLoadName is called.
const Elf_Shdr *getRelSection(DataRefImpl Rel) const {
return getSection(Rel.w.b);
}
- // Helper to read a single ARM attribute at the given pointer and return the
- // read pointer moved forward to the next attribute location.
- uintptr_t readARMSingleAttribute(uintptr_t ReadPtr,
- ARMBuildAttrs::ARMGenericBuildAttrInfo &Attrs,
- SmallVector<unsigned, 16> &TagSet) const;
public:
bool isRelocationHasAddend(DataRefImpl Rel) const;
return v->getType() == getELFType(ELFT::TargetEndianness == support::little,
ELFT::Is64Bits);
}
-
- /// \brief Read the ARM build attributes of this object file.
- /// \param Attrs The attributes container to put the attribute values.
- /// \param TagsSet A list of attribute tags that were read.
- error_code readARMBuildAttributes(
- ARMBuildAttrs::ARMGenericBuildAttrInfo &Attrs,
- SmallVector<unsigned, 16> &TagsSet) const;
-
- /// \brief Checks if an ARM build attributes section exists.
- bool hasARMBuildAttributes() const {
- return dot_arm_attributes_sec ? true : false;
- }
};
// Iterate through the version definitions, and place each Elf_Verdef
, dot_gnu_version_sec(0)
, dot_gnu_version_r_sec(0)
, dot_gnu_version_d_sec(0)
- , dot_arm_attributes_sec(0)
, dt_soname(0)
{
dot_gnu_version_r_sec = sh;
break;
}
- case ELF::SHT_ARM_ATTRIBUTES: {
- if (dot_arm_attributes_sec != NULL)
- // FIXME: Proper error handling.
- report_fatal_error("More than one .arm.attributes section!");
- dot_arm_attributes_sec = sh;
- break;
- }
}
++sh;
}
llvm_unreachable("Object passed to GetELFSymbolVersion() is not ELF");
}
-template<class ELFT>
-error_code ELFObjectFile<ELFT>::readARMBuildAttributes(
- ARMBuildAttrs::ARMGenericBuildAttrInfo &Attrs,
- SmallVector<unsigned, 16> &TagsSet) const {
- if (getArch() != Triple::arm)
- return object_error::invalid_file_type;
- if (!dot_arm_attributes_sec)
- return object_error::parse_failed;
-
- const char *SecStart = (const char*)base() +
- dot_arm_attributes_sec->sh_offset;
- const char *SecEnd = SecStart + dot_arm_attributes_sec->sh_size;
- char format_version = *SecStart;
- if (format_version != ARMBuildAttrs::Format_Version)
- return object_error::parse_failed;
-
- uintptr_t SSectionPtr = (uintptr_t)SecStart + 1;
- uintptr_t ReadPtr = SSectionPtr;
- // Begin reading section after format-version byte
- while (ReadPtr < (uintptr_t)SecEnd) {
- // Read a subsection, starting with: <section-length> "vendor-name"
- // For now, we only care about the "aeabi" pseudo-vendor subsection.
- uint32_t SSectionLen = *(Elf_Word*)ReadPtr;
- ReadPtr += sizeof(uint32_t);
- StringRef Vendor((char*)(ReadPtr));
- ReadPtr += Vendor.size() + 1; // Vendor string + NUL byte
-
- if (Vendor != "aeabi") {
- SSectionPtr += SSectionLen;
- ReadPtr = SSectionPtr;
- continue; //skip to the next sub-section
- }
-
- bool FoundFileTag = false;
- uintptr_t SSSectionPtr = ReadPtr;
- uint32_t SSSectionLen = *(Elf_Word*)ReadPtr;
- // Found aeabi subsection, now find the File scope tag.
- while (ReadPtr < SSectionPtr + SSectionLen) {
- unsigned n = 0;
- uint64_t Tag = decodeULEB128((uint8_t*)ReadPtr, &n);
- ReadPtr += n;
- SSSectionLen = *(Elf_Word*)ReadPtr;
- if (Tag == ARMBuildAttrs::File) {
- FoundFileTag = true;
- break;
- }
- // We only handle File scope attributes, skip ahead to the next
- // sub-subsection.
- SSSectionPtr += SSSectionLen;
- ReadPtr = SSSectionPtr;
- }
-
- if (!FoundFileTag)
- return object_error::parse_failed;
-
- ReadPtr += sizeof(uint32_t);
- while (ReadPtr < SSSectionPtr + SSSectionLen) {
- // Read any number of attributes.
- // Attributes are pairs of <uleb128, uleb128> or <uleb128, NTBS>.
- ReadPtr = readARMSingleAttribute(ReadPtr, Attrs, TagsSet);
- }
- Attrs.setValid(true);
- }
- return object_error::success;
-}
-
-#define SWITCH_ARM_ATTR_READ_ULEB(X) case ARMBuildAttrs::X: \
- UlebValue = decodeULEB128((uint8_t*)ReadPtr, &n); \
- ReadPtr += n; \
- Attrs.Tag_##X = UlebValue; \
- TagsSet.push_back(tag); \
- break;
-
-template<class ELFT>
-uintptr_t ELFObjectFile<ELFT>::readARMSingleAttribute(uintptr_t ReadPtr,
- ARMBuildAttrs::ARMGenericBuildAttrInfo &Attrs,
- SmallVector<unsigned, 16> &TagsSet) const {
- // The ABI says that tags in the range 0-63 must be handled by tools.
- unsigned n = 0;
- uint64_t tagInt = decodeULEB128((uint8_t*)ReadPtr, &n);
- ARMBuildAttrs::AttrType tag = (ARMBuildAttrs::AttrType)tagInt;
- ReadPtr += n;
- uint64_t UlebValue = 0;
- StringRef StrValue;
- switch (tag) {
- case ARMBuildAttrs::CPU_arch: // uleb128
- UlebValue = decodeULEB128((uint8_t*)ReadPtr, &n);
- ReadPtr += n;
- Attrs.Tag_CPU_arch = (ARMBuildAttrs::CPUArch)UlebValue;
- TagsSet.push_back(tag);
- break;
- case ARMBuildAttrs::CPU_raw_name: // NTBS
- StrValue = (char*)ReadPtr;
- Attrs.Tag_CPU_raw_name = StrValue;
- TagsSet.push_back(ARMBuildAttrs::CPU_raw_name);
- ReadPtr += StrValue.size() + 1;
- break;
- case ARMBuildAttrs::CPU_name: //NTBS
- StrValue = (char*)ReadPtr;
- Attrs.Tag_CPU_name = StrValue;
- TagsSet.push_back(ARMBuildAttrs::CPU_name);
- ReadPtr += StrValue.size() + 1;
- break;
- case ARMBuildAttrs::CPU_arch_profile: // uleb128
- UlebValue = decodeULEB128((uint8_t*)ReadPtr, &n);
- ReadPtr += n;
- Attrs.Tag_CPU_arch_profile =
- (ARMBuildAttrs::CPUArchProfile)UlebValue;
- TagsSet.push_back(tag);
- break;
- SWITCH_ARM_ATTR_READ_ULEB(ARM_ISA_use)
- SWITCH_ARM_ATTR_READ_ULEB(THUMB_ISA_use)
- SWITCH_ARM_ATTR_READ_ULEB(FP_arch)
- SWITCH_ARM_ATTR_READ_ULEB(WMMX_arch)
- SWITCH_ARM_ATTR_READ_ULEB(Advanced_SIMD_arch)
- SWITCH_ARM_ATTR_READ_ULEB(FP_HP_extension)
- SWITCH_ARM_ATTR_READ_ULEB(CPU_unaligned_access)
- SWITCH_ARM_ATTR_READ_ULEB(MPextension_use)
- SWITCH_ARM_ATTR_READ_ULEB(DIV_use)
- SWITCH_ARM_ATTR_READ_ULEB(T2EE_use)
- SWITCH_ARM_ATTR_READ_ULEB(Virtualization_use)
- SWITCH_ARM_ATTR_READ_ULEB(ABI_optimization_goals)
- SWITCH_ARM_ATTR_READ_ULEB(ABI_FP_optimization_goals)
- SWITCH_ARM_ATTR_READ_ULEB(PCS_config)
- SWITCH_ARM_ATTR_READ_ULEB(ABI_PCS_R9_use)
- SWITCH_ARM_ATTR_READ_ULEB(ABI_PCS_RW_data)
- SWITCH_ARM_ATTR_READ_ULEB(ABI_PCS_RO_data)
- SWITCH_ARM_ATTR_READ_ULEB(ABI_PCS_GOT_use)
- SWITCH_ARM_ATTR_READ_ULEB(ABI_PCS_wchar_t)
- SWITCH_ARM_ATTR_READ_ULEB(ABI_enum_size)
- SWITCH_ARM_ATTR_READ_ULEB(ABI_align8_needed)
- SWITCH_ARM_ATTR_READ_ULEB(ABI_align8_preserved)
- SWITCH_ARM_ATTR_READ_ULEB(ABI_FP_rounding)
- SWITCH_ARM_ATTR_READ_ULEB(ABI_FP_denormal)
- SWITCH_ARM_ATTR_READ_ULEB(ABI_FP_number_model)
- SWITCH_ARM_ATTR_READ_ULEB(ABI_FP_exceptions)
- SWITCH_ARM_ATTR_READ_ULEB(ABI_FP_user_exceptions)
- SWITCH_ARM_ATTR_READ_ULEB(ABI_HardFP_use)
- SWITCH_ARM_ATTR_READ_ULEB(ABI_VFP_args)
- default:
- // Unhandled build attribute tag, according to the spec we should be able
- // to infer the type of the value from (tag % 2) and skip over it.
- if (tag & 0x1) {
- // Value should be a null terminated byte string
- StrValue = (char*)ReadPtr;
- ReadPtr += StrValue.size() + 1;
- } else {
- // Value should be a uleb128
- UlebValue = decodeULEB128((uint8_t*)ReadPtr, &n);
- ReadPtr += n;
- }
- break;
- }
- return ReadPtr;
-}
-#undef SWITCH_ARM_ATTR_READ_ULEB
-
-
/// This function returns the hash value for a symbol in the .dynsym section
/// Name of the API remains consistent as specified in the libelf
/// REF : http://www.sco.com/developers/gabi/latest/ch5.dynamic.html#hash
projects / oota-llvm.git / blobdiff