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Add basic linux-ilp32 platform support #7292

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Add basic linux-ilp32 platform support #7292

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64 changes: 59 additions & 5 deletions platform/linux/platform_linux.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -4,7 +4,9 @@ using namespace BinaryNinja;
using namespace std;

Ref<Platform> g_linuxX32;
Ref<Platform> g_linuxIlp32;
#define EM_X86_64 62 // AMD x86-64 architecture
#define EM_AARCH64 183 // ARM64 architecture

class LinuxX86Platform: public Platform
{
Expand Down Expand Up @@ -199,6 +201,50 @@ class LinuxArm64Platform: public Platform
}
};

class LinuxIlp32Platform: public Platform
{
public:
LinuxIlp32Platform(Architecture* arch): Platform(arch, "linux-ilp32")
{
Ref<CallingConvention> cc;

cc = arch->GetCallingConventionByName("cdecl");
if (cc)
{
RegisterDefaultCallingConvention(cc);
RegisterCdeclCallingConvention(cc);
RegisterFastcallCallingConvention(cc);
RegisterStdcallCallingConvention(cc);
}

cc = arch->GetCallingConventionByName("linux-syscall");
if (cc)
SetSystemCallConvention(cc);
}

virtual size_t GetAddressSize() const override
{
return 4;
}

static Ref<Platform> Recognize(BinaryView* view, Metadata* metadata)
{
Ref<Metadata> fileClass = metadata->Get("EI_CLASS");

if (!fileClass || !fileClass->IsUnsignedInteger())
return nullptr;

Ref<Metadata> machine = metadata->Get("e_machine");
if (!machine || !machine->IsUnsignedInteger())
return nullptr;

if (fileClass->GetUnsignedInteger() == 1 && machine->GetUnsignedInteger() == EM_AARCH64)
return g_linuxIlp32;

return nullptr;
}
};


class LinuxMipsPlatform: public Platform
{
Expand Down Expand Up @@ -406,13 +452,21 @@ extern "C"
Ref<Architecture> arm64 = Architecture::GetByName("aarch64");
if (arm64)
{
Ref<Platform> platform;
Ref<Platform> arm64_platform = new LinuxArm64Platform(arm64);
g_linuxIlp32 = new LinuxIlp32Platform(arm64);

Platform::Register("linux", arm64_platform);
Platform::Register("linux", g_linuxIlp32);

platform = new LinuxArm64Platform(arm64);
Platform::Register("linux", platform);
// Linux binaries sometimes have an OS identifier of zero, even though 3 is the correct one
BinaryViewType::RegisterPlatform("ELF", 0, platform);
BinaryViewType::RegisterPlatform("ELF", 3, platform);
BinaryViewType::RegisterPlatform("ELF", 0, arm64_platform);
BinaryViewType::RegisterPlatform("ELF", 3, arm64_platform);

Ref<BinaryViewType> elf = BinaryViewType::GetByName("ELF");
if (elf) {
elf->RegisterPlatformRecognizer(EM_AARCH64, LittleEndian, LinuxIlp32Platform::Recognize);
elf->RegisterPlatformRecognizer(EM_AARCH64, BigEndian, LinuxIlp32Platform::Recognize);
}
}

Ref<Architecture> ppc = Architecture::GetByName("ppc");
Expand Down