andrew updated this revision to Diff 411118.
andrew added a comment.
Rebase
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D110569/new/
https://reviews.llvm.org/D110569
Files:
lldb/source/Plugins/Process/FreeBSD/NativeRegisterContextFreeBSD.h
lldb/source/Plugins/Process/FreeBSD/NativeRegisterContextFreeBSD_arm64.cpp
lldb/source/Plugins/Process/FreeBSD/NativeRegisterContextFreeBSD_arm64.h
Index: lldb/source/Plugins/Process/FreeBSD/NativeRegisterContextFreeBSD_arm64.h
===================================================================
--- lldb/source/Plugins/Process/FreeBSD/NativeRegisterContextFreeBSD_arm64.h
+++ lldb/source/Plugins/Process/FreeBSD/NativeRegisterContextFreeBSD_arm64.h
@@ -63,14 +63,29 @@
// LLDB's GPR/FPU structs. However, all fields have matching offsets
// and sizes, so we do not have to worry about these (and we have
// a unittest to assert that).
- std::array<uint8_t, sizeof(reg) + sizeof(fpreg)> m_reg_data;
+ std::array<uint8_t, sizeof(reg)> m_reg_data;
+ std::array<uint8_t, sizeof(fpreg)> m_fpreg_data;
#ifdef LLDB_HAS_FREEBSD_WATCHPOINT
dbreg m_dbreg;
bool m_read_dbreg;
#endif
- Status ReadRegisterSet(uint32_t set);
- Status WriteRegisterSet(uint32_t set);
+ void *GetGPRBuffer() { return &m_reg_data; }
+ size_t GetGPRBufferSize() { return sizeof(m_reg_data); }
+
+ void *GetFPRBuffer() { return &m_fpreg_data; }
+ size_t GetFPRSize() { return sizeof(m_fpreg_data); }
+
+ bool IsGPR(unsigned reg) const;
+ bool IsFPR(unsigned reg) const;
+
+ Status ReadGPR();
+ Status WriteGPR();
+
+ Status ReadFPR();
+ Status WriteFPR();
+
+ uint32_t CalculateFprOffset(const RegisterInfo *reg_info) const;
llvm::Error ReadHardwareDebugInfo() override;
llvm::Error WriteHardwareDebugRegs(DREGType hwbType) override;
Index: lldb/source/Plugins/Process/FreeBSD/NativeRegisterContextFreeBSD_arm64.cpp
===================================================================
--- lldb/source/Plugins/Process/FreeBSD/NativeRegisterContextFreeBSD_arm64.cpp
+++ lldb/source/Plugins/Process/FreeBSD/NativeRegisterContextFreeBSD_arm64.cpp
@@ -24,6 +24,8 @@
#include <sys/types.h>
// clang-format on
+#define REG_CONTEXT_SIZE (GetGPRSize() + GetFPRSize())
+
using namespace lldb;
using namespace lldb_private;
using namespace lldb_private::process_freebsd;
@@ -68,30 +70,43 @@
return count;
}
-Status NativeRegisterContextFreeBSD_arm64::ReadRegisterSet(uint32_t set) {
- switch (set) {
- case RegisterInfoPOSIX_arm64::GPRegSet:
- return NativeProcessFreeBSD::PtraceWrapper(PT_GETREGS, m_thread.GetID(),
- m_reg_data.data());
- case RegisterInfoPOSIX_arm64::FPRegSet:
- return NativeProcessFreeBSD::PtraceWrapper(
- PT_GETFPREGS, m_thread.GetID(),
- m_reg_data.data() + sizeof(RegisterInfoPOSIX_arm64::GPR));
- }
- llvm_unreachable("NativeRegisterContextFreeBSD_arm64::ReadRegisterSet");
+bool NativeRegisterContextFreeBSD_arm64::IsGPR(unsigned reg) const {
+ if (GetRegisterInfo().GetRegisterSetFromRegisterIndex(reg) ==
+ RegisterInfoPOSIX_arm64::GPRegSet)
+ return true;
+ return false;
}
-Status NativeRegisterContextFreeBSD_arm64::WriteRegisterSet(uint32_t set) {
- switch (set) {
- case RegisterInfoPOSIX_arm64::GPRegSet:
- return NativeProcessFreeBSD::PtraceWrapper(PT_SETREGS, m_thread.GetID(),
- m_reg_data.data());
- case RegisterInfoPOSIX_arm64::FPRegSet:
- return NativeProcessFreeBSD::PtraceWrapper(
- PT_SETFPREGS, m_thread.GetID(),
- m_reg_data.data() + sizeof(RegisterInfoPOSIX_arm64::GPR));
- }
- llvm_unreachable("NativeRegisterContextFreeBSD_arm64::WriteRegisterSet");
+bool NativeRegisterContextFreeBSD_arm64::IsFPR(unsigned reg) const {
+ if (GetRegisterInfo().GetRegisterSetFromRegisterIndex(reg) ==
+ RegisterInfoPOSIX_arm64::FPRegSet)
+ return true;
+ return false;
+}
+
+Status NativeRegisterContextFreeBSD_arm64::ReadGPR() {
+ return NativeProcessFreeBSD::PtraceWrapper(
+ PT_GETREGS, m_thread.GetID(), m_reg_data.data());
+}
+
+Status NativeRegisterContextFreeBSD_arm64::WriteGPR() {
+ return NativeProcessFreeBSD::PtraceWrapper(
+ PT_SETREGS, m_thread.GetID(), m_reg_data.data());
+}
+
+Status NativeRegisterContextFreeBSD_arm64::ReadFPR() {
+ return NativeProcessFreeBSD::PtraceWrapper(
+ PT_GETFPREGS, m_thread.GetID(), m_fpreg_data.data());
+}
+
+Status NativeRegisterContextFreeBSD_arm64::WriteFPR() {
+ return NativeProcessFreeBSD::PtraceWrapper(
+ PT_SETFPREGS, m_thread.GetID(), m_fpreg_data.data());
+}
+
+uint32_t NativeRegisterContextFreeBSD_arm64::CalculateFprOffset(
+ const RegisterInfo *reg_info) const {
+ return reg_info->byte_offset - GetGPRSize();
}
Status
@@ -111,14 +126,30 @@
? reg_info->name
: "<unknown register>");
- uint32_t set = GetRegisterInfo().GetRegisterSetFromRegisterIndex(reg);
- 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());
+ uint8_t *src;
+ uint32_t offset = LLDB_INVALID_INDEX32;
+
+ if (IsGPR(reg)) {
+ error = ReadGPR();
+ if (error.Fail())
+ return error;
+
+ offset = reg_info->byte_offset;
+ assert(offset < GetGPRSize());
+ src = (uint8_t *)GetGPRBuffer() + offset;
+ } else if (IsFPR(reg)) {
+ error = ReadFPR();
+ if (error.Fail())
+ return error;
+
+ offset = CalculateFprOffset(reg_info);
+ assert(offset < GetFPRSize());
+ src = (uint8_t *)GetFPRBuffer() + offset;
+ } else
+ return Status("Failed to read register value");
+
+ reg_value.SetFromMemoryData(reg_info, src, reg_info->byte_size,
+ endian::InlHostByteOrder(), error);
return error;
}
@@ -136,33 +167,53 @@
? reg_info->name
: "<unknown register>");
- uint32_t set = GetRegisterInfo().GetRegisterSetFromRegisterIndex(reg);
- error = ReadRegisterSet(set);
- if (error.Fail())
- return error;
+ uint8_t *dst;
+ uint32_t offset = LLDB_INVALID_INDEX32;
+
+ if (IsGPR(reg)) {
+ error = ReadGPR();
+ if (error.Fail())
+ return error;
+
+ assert(reg_info->byte_offset < GetGPRSize());
+ dst = (uint8_t *)GetGPRBuffer() + reg_info->byte_offset;
+ ::memcpy(dst, reg_value.GetBytes(), reg_info->byte_size);
+
+ return WriteGPR();
+ } else if (IsFPR(reg)) {
+ error = ReadFPR();
+ if (error.Fail())
+ return error;
+
+ offset = CalculateFprOffset(reg_info);
+ assert(offset < GetFPRSize());
+ dst = (uint8_t *)GetFPRBuffer() + offset;
+ ::memcpy(dst, reg_value.GetBytes(), reg_info->byte_size);
- 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 WriteFPR();
+ }
- return WriteRegisterSet(set);
+ return Status("Failed to write register value");
}
Status NativeRegisterContextFreeBSD_arm64::ReadAllRegisterValues(
lldb::DataBufferSP &data_sp) {
Status error;
- error = ReadRegisterSet(RegisterInfoPOSIX_arm64::GPRegSet);
+ data_sp.reset(new DataBufferHeap(REG_CONTEXT_SIZE, 0));
+
+ error = ReadGPR();
if (error.Fail())
return error;
- error = ReadRegisterSet(RegisterInfoPOSIX_arm64::FPRegSet);
+ error = ReadFPR();
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());
+ ::memcpy(dst, GetGPRBuffer(), GetGPRSize());
+ dst += GetGPRSize();
+ ::memcpy(dst, GetFPRBuffer(), GetFPRSize());
return error;
}
@@ -178,7 +229,7 @@
return error;
}
- if (data_sp->GetByteSize() != m_reg_data.size()) {
+ if (data_sp->GetByteSize() != REG_CONTEXT_SIZE) {
error.SetErrorStringWithFormat(
"NativeRegisterContextFreeBSD_arm64::%s data_sp contained mismatched "
"data size, expected %" PRIu64 ", actual %" PRIu64,
@@ -194,13 +245,20 @@
__FUNCTION__);
return error;
}
- ::memcpy(m_reg_data.data(), src, m_reg_data.size());
+ ::memcpy(GetGPRBuffer(), src, GetRegisterInfoInterface().GetGPRSize());
- error = WriteRegisterSet(RegisterInfoPOSIX_arm64::GPRegSet);
+ error = WriteGPR();
if (error.Fail())
return error;
- return WriteRegisterSet(RegisterInfoPOSIX_arm64::FPRegSet);
+ src += GetRegisterInfoInterface().GetGPRSize();
+ ::memcpy(GetFPRBuffer(), src, GetFPRSize());
+
+ error = WriteFPR();
+ if (error.Fail())
+ return error;
+
+ return error;
}
llvm::Error NativeRegisterContextFreeBSD_arm64::CopyHardwareWatchpointsFrom(
Index: lldb/source/Plugins/Process/FreeBSD/NativeRegisterContextFreeBSD.h
===================================================================
--- lldb/source/Plugins/Process/FreeBSD/NativeRegisterContextFreeBSD.h
+++ lldb/source/Plugins/Process/FreeBSD/NativeRegisterContextFreeBSD.h
@@ -35,6 +35,10 @@
protected:
virtual NativeProcessFreeBSD &GetProcess();
virtual ::pid_t GetProcessPid();
+
+ virtual size_t GetGPRSize() const {
+ return GetRegisterInfoInterface().GetGPRSize();
+ }
};
} // namespace process_freebsd
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