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Very minimal support 24-bit kalimbas. Vanilla "memory read" for data sections

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works, as do breakpoints, run and pause, display zeroth frame.

See
http://reviews.llvm.org/D5503

for a fuller description of the changes in this commit.

llvm-svn: 218596
This commit is contained in:
Matthew Gardiner
2014-09-29 08:02:24 +00:00
parent 1779d438bc
commit f03e6d84bc
10 changed files with 129 additions and 48 deletions
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46
lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp
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@@ -267,10 +267,14 @@ kalimbaVariantFromElfFlags(const elf::elf_word e_flags)
{
// TODO(mg11) Support more variants
case 10:
kal_arch_variant = 3;
kal_arch_variant = llvm::Triple::KalimbaSubArch_v3;
break;
case 14:
kal_arch_variant = 4;
kal_arch_variant = llvm::Triple::KalimbaSubArch_v4;
break;
case 17:
case 20:
kal_arch_variant = llvm::Triple::KalimbaSubArch_v5;
break;
default:
break;
@@ -287,6 +291,27 @@ subTypeFromElfHeader(const elf::ELFHeader& header)
LLDB_INVALID_CPUTYPE;
}
//! brief kalimbaSectionType
//! The kalimba toolchain identifies a code section as being
//! one with the SHT_PROGBITS set in the section sh_type and the top
//! bit in the 32-bit address field set.
static lldb::SectionType
kalimbaSectionType(
const elf::ELFHeader& header,
const elf::ELFSectionHeader& sect_hdr)
{
if (
llvm::ELF::EM_CSR_KALIMBA != header.e_machine ||
llvm::ELF::SHT_PROGBITS != sect_hdr.sh_type)
{
return eSectionTypeOther;
}
const lldb::addr_t KAL_CODE_BIT = 1 << 31;
return KAL_CODE_BIT & sect_hdr.sh_addr ?
eSectionTypeCode : eSectionTypeData;
}
// Arbitrary constant used as UUID prefix for core files.
const uint32_t
ObjectFileELF::g_core_uuid_magic(0xE210C);
@@ -1592,6 +1617,20 @@ ObjectFileELF::CreateSections(SectionList &unified_section_list)
break;
}
if (eSectionTypeOther == sect_type)
{
// the kalimba toolchain assumes that ELF section names are free-form. It does
// supports linkscripts which (can) give rise to various arbitarily named
// sections being "Code" or "Data".
sect_type = kalimbaSectionType(m_header, header);
}
const uint32_t target_bytes_size =
eSectionTypeData == sect_type ?
m_arch_spec.GetDataByteSize() :
eSectionTypeCode == sect_type ?
m_arch_spec.GetCodeByteSize() : 1;
elf::elf_xword log2align = (header.sh_addralign==0)
? 0
: llvm::Log2_64(header.sh_addralign);
@@ -1605,7 +1644,8 @@ ObjectFileELF::CreateSections(SectionList &unified_section_list)
header.sh_offset, // Offset of this section in the file.
file_size, // Size of the section as found in the file.
log2align, // Alignment of the section
header.sh_flags)); // Flags for this section.
header.sh_flags, // Flags for this section.
target_bytes_size));// Number of host bytes per target byte
if (is_thread_specific)
section_sp->SetIsThreadSpecific (is_thread_specific);