caio/clang-p2996
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

[LLDB][MIPS] Detect MIPS application specific extensions like micromips

Browse Source 
SUMMARY:
    The patch detects MIPS application specific extensions (ASE) like micromips by reading 
    ELF header.e_flags and SHT_MIPS_ABIFLAGS section. MIPS triple does not contain ASE 
    information like micromips, mips16, DSP, MSA etc. These can be read from header.e_flags 
    or SHT_MIPS_ABIFLAGS section.
    
    Reviewers: clayborg
    Subscribers: mohit.bhakkad, sagar, lldb-commits
    Differential Revision: http://reviews.llvm.org/D11133

llvm-svn: 242381
This commit is contained in:
Jaydeep Patil
2015-07-16 03:51:55 +00:00
parent d25d72fb79
commit 501a781998
7 changed files with 153 additions and 34 deletions
Download Patch File Download Diff File Expand all files Collapse all files

35
lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp
View File

@@ -1437,6 +1437,25 @@ ObjectFileELF::GetSectionHeaderInfo(SectionHeaderColl &section_headers,
assert(spec_ostype == ostype);
}
if (arch_spec.GetMachine() == llvm::Triple::mips || arch_spec.GetMachine() == llvm::Triple::mipsel
|| arch_spec.GetMachine() == llvm::Triple::mips64 || arch_spec.GetMachine() == llvm::Triple::mips64el)
{
switch (header.e_flags & llvm::ELF::EF_MIPS_ARCH_ASE)
{
case llvm::ELF::EF_MIPS_MICROMIPS:
arch_spec.SetFlags (ArchSpec::eMIPSAse_micromips);
break;
case llvm::ELF::EF_MIPS_ARCH_ASE_M16:
arch_spec.SetFlags (ArchSpec::eMIPSAse_mips16);
break;
case llvm::ELF::EF_MIPS_ARCH_ASE_MDMX:
arch_spec.SetFlags (ArchSpec::eMIPSAse_mdmx);
break;
default:
break;
}
}
// If there are no section headers we are done.
if (header.e_shnum == 0)
return 0;
@@ -1483,6 +1502,22 @@ ObjectFileELF::GetSectionHeaderInfo(SectionHeaderColl &section_headers,
I->section_name = name;
if (arch_spec.GetMachine() == llvm::Triple::mips || arch_spec.GetMachine() == llvm::Triple::mipsel
|| arch_spec.GetMachine() == llvm::Triple::mips64 || arch_spec.GetMachine() == llvm::Triple::mips64el)
{
if (header.sh_type == SHT_MIPS_ABIFLAGS)
{
DataExtractor data;
if (section_size && (data.SetData (object_data, header.sh_offset, section_size) == section_size))
{
lldb::offset_t ase_offset = 12; // MIPS ABI Flags Version: 0
uint32_t arch_flags = arch_spec.GetFlags ();
arch_flags |= data.GetU32 (&ase_offset);
arch_spec.SetFlags (arch_flags);
}
}
}
if (name == g_sect_name_gnu_debuglink)
{
DataExtractor data;