diff options
Diffstat (limited to 'lldb/source/Plugins/Process/FreeBSD/NativeRegisterContextFreeBSD_powerpc.cpp')
| -rw-r--r-- | lldb/source/Plugins/Process/FreeBSD/NativeRegisterContextFreeBSD_powerpc.cpp | 289 |
1 files changed, 289 insertions, 0 deletions
diff --git a/lldb/source/Plugins/Process/FreeBSD/NativeRegisterContextFreeBSD_powerpc.cpp b/lldb/source/Plugins/Process/FreeBSD/NativeRegisterContextFreeBSD_powerpc.cpp new file mode 100644 index 000000000000..5b5d44a308b1 --- /dev/null +++ b/lldb/source/Plugins/Process/FreeBSD/NativeRegisterContextFreeBSD_powerpc.cpp @@ -0,0 +1,289 @@ +//===-- NativeRegisterContextFreeBSD_powerpc.cpp --------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#if defined(__powerpc__) + +#include "NativeRegisterContextFreeBSD_powerpc.h" + +#include "lldb/Host/HostInfo.h" +#include "lldb/Utility/DataBufferHeap.h" +#include "lldb/Utility/RegisterValue.h" +#include "lldb/Utility/Status.h" + +#include "Plugins/Process/FreeBSD/NativeProcessFreeBSD.h" +// for register enum definitions +#include "Plugins/Process/Utility/RegisterContextPOSIX_powerpc.h" + +// clang-format off +#include <sys/param.h> +#include <sys/ptrace.h> +#include <sys/types.h> +// clang-format on + +using namespace lldb; +using namespace lldb_private; +using namespace lldb_private::process_freebsd; + +static const uint32_t g_gpr_regnums[] = { + gpr_r0_powerpc, gpr_r1_powerpc, gpr_r2_powerpc, gpr_r3_powerpc, + gpr_r4_powerpc, gpr_r5_powerpc, gpr_r6_powerpc, gpr_r7_powerpc, + gpr_r8_powerpc, gpr_r9_powerpc, gpr_r10_powerpc, gpr_r11_powerpc, + gpr_r12_powerpc, gpr_r13_powerpc, gpr_r14_powerpc, gpr_r15_powerpc, + gpr_r16_powerpc, gpr_r17_powerpc, gpr_r18_powerpc, gpr_r19_powerpc, + gpr_r20_powerpc, gpr_r21_powerpc, gpr_r22_powerpc, gpr_r23_powerpc, + gpr_r24_powerpc, gpr_r25_powerpc, gpr_r26_powerpc, gpr_r27_powerpc, + gpr_r28_powerpc, gpr_r29_powerpc, gpr_r30_powerpc, gpr_r31_powerpc, + gpr_lr_powerpc, gpr_cr_powerpc, gpr_xer_powerpc, gpr_ctr_powerpc, + gpr_pc_powerpc, +}; + +static const uint32_t g_fpr_regnums[] = { + fpr_f0_powerpc, fpr_f1_powerpc, fpr_f2_powerpc, fpr_f3_powerpc, + fpr_f4_powerpc, fpr_f5_powerpc, fpr_f6_powerpc, fpr_f7_powerpc, + fpr_f8_powerpc, fpr_f9_powerpc, fpr_f10_powerpc, fpr_f11_powerpc, + fpr_f12_powerpc, fpr_f13_powerpc, fpr_f14_powerpc, fpr_f15_powerpc, + fpr_f16_powerpc, fpr_f17_powerpc, fpr_f18_powerpc, fpr_f19_powerpc, + fpr_f20_powerpc, fpr_f21_powerpc, fpr_f22_powerpc, fpr_f23_powerpc, + fpr_f24_powerpc, fpr_f25_powerpc, fpr_f26_powerpc, fpr_f27_powerpc, + fpr_f28_powerpc, fpr_f29_powerpc, fpr_f30_powerpc, fpr_f31_powerpc, + fpr_fpscr_powerpc, +}; + +// Number of register sets provided by this context. +enum { k_num_register_sets = 2 }; + +static const RegisterSet g_reg_sets_powerpc[k_num_register_sets] = { + {"General Purpose Registers", "gpr", k_num_gpr_registers_powerpc, + g_gpr_regnums}, + {"Floating Point Registers", "fpr", k_num_fpr_registers_powerpc, + g_fpr_regnums}, +}; + +NativeRegisterContextFreeBSD * +NativeRegisterContextFreeBSD::CreateHostNativeRegisterContextFreeBSD( + const ArchSpec &target_arch, NativeThreadProtocol &native_thread) { + return new NativeRegisterContextFreeBSD_powerpc(target_arch, native_thread); +} + +static RegisterInfoInterface * +CreateRegisterInfoInterface(const ArchSpec &target_arch) { + if (HostInfo::GetArchitecture().GetAddressByteSize() == 4) { + return new RegisterContextFreeBSD_powerpc32(target_arch); + } else { + assert((HostInfo::GetArchitecture().GetAddressByteSize() == 8) && + "Register setting path assumes this is a 64-bit host"); + return new RegisterContextFreeBSD_powerpc64(target_arch); + } +} + +NativeRegisterContextFreeBSD_powerpc::NativeRegisterContextFreeBSD_powerpc( + const ArchSpec &target_arch, NativeThreadProtocol &native_thread) + : NativeRegisterContextRegisterInfo( + native_thread, CreateRegisterInfoInterface(target_arch)) {} + +RegisterContextFreeBSD_powerpc & +NativeRegisterContextFreeBSD_powerpc::GetRegisterInfo() const { + return static_cast<RegisterContextFreeBSD_powerpc &>( + *m_register_info_interface_up); +} + +uint32_t NativeRegisterContextFreeBSD_powerpc::GetRegisterSetCount() const { + return k_num_register_sets; +} + +const RegisterSet * +NativeRegisterContextFreeBSD_powerpc::GetRegisterSet(uint32_t set_index) const { + switch (GetRegisterInfoInterface().GetTargetArchitecture().GetMachine()) { + case llvm::Triple::ppc: + return &g_reg_sets_powerpc[set_index]; + default: + llvm_unreachable("Unhandled target architecture."); + } +} + +llvm::Optional<NativeRegisterContextFreeBSD_powerpc::RegSetKind> +NativeRegisterContextFreeBSD_powerpc::GetSetForNativeRegNum( + uint32_t reg_num) const { + switch (GetRegisterInfoInterface().GetTargetArchitecture().GetMachine()) { + case llvm::Triple::ppc: + if (reg_num >= k_first_gpr_powerpc && reg_num <= k_last_gpr_powerpc) + return GPRegSet; + if (reg_num >= k_first_fpr && reg_num <= k_last_fpr) + return FPRegSet; + break; + default: + llvm_unreachable("Unhandled target architecture."); + } + + llvm_unreachable("Register does not belong to any register set"); +} + +uint32_t NativeRegisterContextFreeBSD_powerpc::GetUserRegisterCount() const { + uint32_t count = 0; + for (uint32_t set_index = 0; set_index < GetRegisterSetCount(); ++set_index) + count += GetRegisterSet(set_index)->num_registers; + return count; +} + +Status NativeRegisterContextFreeBSD_powerpc::ReadRegisterSet(RegSetKind set) { + switch (set) { + case GPRegSet: + return NativeProcessFreeBSD::PtraceWrapper(PT_GETREGS, m_thread.GetID(), + m_reg_data.data()); + case FPRegSet: + return NativeProcessFreeBSD::PtraceWrapper(PT_GETFPREGS, m_thread.GetID(), + m_reg_data.data() + sizeof(reg)); + } + llvm_unreachable("NativeRegisterContextFreeBSD_powerpc::ReadRegisterSet"); +} + +Status NativeRegisterContextFreeBSD_powerpc::WriteRegisterSet(RegSetKind set) { + switch (set) { + case GPRegSet: + return NativeProcessFreeBSD::PtraceWrapper(PT_SETREGS, m_thread.GetID(), + m_reg_data.data()); + case FPRegSet: + return NativeProcessFreeBSD::PtraceWrapper(PT_SETFPREGS, m_thread.GetID(), + m_reg_data.data() + sizeof(reg)); + } + llvm_unreachable("NativeRegisterContextFreeBSD_powerpc::WriteRegisterSet"); +} + +Status +NativeRegisterContextFreeBSD_powerpc::ReadRegister(const RegisterInfo *reg_info, + RegisterValue ®_value) { + Status error; + + if (!reg_info) { + error.SetErrorString("reg_info NULL"); + return error; + } + + const uint32_t reg = reg_info->kinds[lldb::eRegisterKindLLDB]; + + if (reg == LLDB_INVALID_REGNUM) + return Status("no lldb regnum for %s", reg_info && reg_info->name + ? reg_info->name + : "<unknown register>"); + + llvm::Optional<RegSetKind> opt_set = GetSetForNativeRegNum(reg); + if (!opt_set) { + // This is likely an internal register for lldb use only and should not be + // directly queried. + error.SetErrorStringWithFormat("register \"%s\" is in unrecognized set", + reg_info->name); + return error; + } + + RegSetKind set = opt_set.getValue(); + error = ReadRegisterSet(set); + if (error.Fail()) + return error; + + assert(reg_info->byte_offset + reg_info->byte_size <= m_reg_data.size()); + reg_value.SetBytes(m_reg_data.data() + reg_info->byte_offset, + reg_info->byte_size, endian::InlHostByteOrder()); + return error; +} + +Status NativeRegisterContextFreeBSD_powerpc::WriteRegister( + const RegisterInfo *reg_info, const RegisterValue ®_value) { + Status error; + + if (!reg_info) + return Status("reg_info NULL"); + + const uint32_t reg = reg_info->kinds[lldb::eRegisterKindLLDB]; + + if (reg == LLDB_INVALID_REGNUM) + return Status("no lldb regnum for %s", reg_info && reg_info->name + ? reg_info->name + : "<unknown register>"); + + llvm::Optional<RegSetKind> opt_set = GetSetForNativeRegNum(reg); + if (!opt_set) { + // This is likely an internal register for lldb use only and should not be + // directly queried. + error.SetErrorStringWithFormat("register \"%s\" is in unrecognized set", + reg_info->name); + return error; + } + + RegSetKind set = opt_set.getValue(); + error = ReadRegisterSet(set); + if (error.Fail()) + return error; + + assert(reg_info->byte_offset + reg_info->byte_size <= m_reg_data.size()); + ::memcpy(m_reg_data.data() + reg_info->byte_offset, reg_value.GetBytes(), + reg_info->byte_size); + + return WriteRegisterSet(set); +} + +Status NativeRegisterContextFreeBSD_powerpc::ReadAllRegisterValues( + lldb::DataBufferSP &data_sp) { + Status error; + + error = ReadRegisterSet(GPRegSet); + if (error.Fail()) + return error; + + error = ReadRegisterSet(FPRegSet); + if (error.Fail()) + return error; + + data_sp.reset(new DataBufferHeap(m_reg_data.size(), 0)); + uint8_t *dst = data_sp->GetBytes(); + ::memcpy(dst, m_reg_data.data(), m_reg_data.size()); + + return error; +} + +Status NativeRegisterContextFreeBSD_powerpc::WriteAllRegisterValues( + const lldb::DataBufferSP &data_sp) { + Status error; + + if (!data_sp) { + error.SetErrorStringWithFormat( + "NativeRegisterContextFreeBSD_powerpc::%s invalid data_sp provided", + __FUNCTION__); + return error; + } + + if (data_sp->GetByteSize() != m_reg_data.size()) { + error.SetErrorStringWithFormat( + "NativeRegisterContextFreeBSD_powerpc::%s data_sp contained mismatched " + "data size, expected %zu, actual %" PRIu64, + __FUNCTION__, m_reg_data.size(), data_sp->GetByteSize()); + return error; + } + + uint8_t *src = data_sp->GetBytes(); + if (src == nullptr) { + error.SetErrorStringWithFormat("NativeRegisterContextFreeBSD_powerpc::%s " + "DataBuffer::GetBytes() returned a null " + "pointer", + __FUNCTION__); + return error; + } + ::memcpy(m_reg_data.data(), src, m_reg_data.size()); + + error = WriteRegisterSet(GPRegSet); + if (error.Fail()) + return error; + + return WriteRegisterSet(FPRegSet); +} + +llvm::Error NativeRegisterContextFreeBSD_powerpc::CopyHardwareWatchpointsFrom( + NativeRegisterContextFreeBSD &source) { + return llvm::Error::success(); +} + +#endif // defined (__powerpc__) |