mgorny updated this revision to Diff 376549.
mgorny retitled this revision from "[lldb] [ABI/AArch64] Add pseudo-regs if
missing [WIP]" to "[lldb] [ABI/AArch64] Add pseudo-regs if missing".
mgorny added a reviewer: teemperor.
mgorny added a comment.
Update for DynamicRegisterInfo move.
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D109876/new/
https://reviews.llvm.org/D109876
Files:
lldb/include/lldb/Target/ABI.h
lldb/source/Plugins/ABI/AArch64/ABIAArch64.cpp
lldb/source/Plugins/ABI/AArch64/ABIAArch64.h
lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
lldb/source/Target/DynamicRegisterInfo.cpp
lldb/test/API/functionalities/gdb_remote_client/TestGDBServerTargetXML.py
Index: lldb/test/API/functionalities/gdb_remote_client/TestGDBServerTargetXML.py
===================================================================
--- lldb/test/API/functionalities/gdb_remote_client/TestGDBServerTargetXML.py
+++ lldb/test/API/functionalities/gdb_remote_client/TestGDBServerTargetXML.py
@@ -380,6 +380,7 @@
return "".join(reg_data)
def writeRegisters(self, reg_hex):
+ reg_data[:] = [reg_hex]
return "OK"
def haltReason(self):
@@ -429,3 +430,43 @@
["v0 = {0x81 0x82 0x83 0x84 0x85 0x86 0x87 0x88 0x89 0x8a 0x8b 0x8c 0x8d 0x8e 0x8f 0x90}"])
self.match("register read v31",
["v31 = {0xa1 0xa2 0xa3 0xa4 0xa5 0xa6 0xa7 0xa8 0xa9 0xaa 0xab 0xac 0xad 0xae 0xaf 0xb0}"])
+
+ # test partial registers
+ self.match("register read w0",
+ ["w0 = 0x04030201"])
+ self.runCmd("register write w0 0xfffefdfc")
+ self.match("register read x0",
+ ["x0 = 0x08070605fffefdfc"])
+
+ self.match("register read w1",
+ ["w1 = 0x14131211"])
+ self.runCmd("register write w1 0xefeeedec")
+ self.match("register read x1",
+ ["x1 = 0x18171615efeeedec"])
+
+ self.match("register read w30",
+ ["w30 = 0x44434241"])
+ self.runCmd("register write w30 0xdfdedddc")
+ self.match("register read x30",
+ ["x30 = 0x48474645dfdedddc"])
+
+ self.match("register read w31",
+ ["w31 = 0x54535251"])
+ self.runCmd("register write w31 0xcfcecdcc")
+ self.match("register read x31",
+ ["sp = 0x58575655cfcecdcc"])
+
+ # test FPU registers (overlapping with vector registers)
+ self.runCmd("register write d0 16")
+ self.match("register read v0",
+ ["v0 = {0x00 0x00 0x00 0x00 0x00 0x00 0x30 0x40 0x89 0x8a 0x8b 0x8c 0x8d 0x8e 0x8f 0x90}"])
+ self.runCmd("register write v31 '{0x00 0x00 0x00 0x00 0x00 0x00 0x50 0x40 0xff 0xff 0xff 0xff 0xff 0xff 0xff 0xff}'")
+ self.match("register read d31",
+ ["d31 = 64"])
+
+ self.runCmd("register write s0 32")
+ self.match("register read v0",
+ ["v0 = {0x00 0x00 0x00 0x42 0x00 0x00 0x30 0x40 0x89 0x8a 0x8b 0x8c 0x8d 0x8e 0x8f 0x90}"])
+ self.runCmd("register write v31 '{0x00 0x00 0x00 0x43 0xff 0xff 0xff 0xff 0xff 0xff 0xff 0xff 0xff 0xff 0xff 0xff}'")
+ self.match("register read s31",
+ ["s31 = 128"])
Index: lldb/source/Target/DynamicRegisterInfo.cpp
===================================================================
--- lldb/source/Target/DynamicRegisterInfo.cpp
+++ lldb/source/Target/DynamicRegisterInfo.cpp
@@ -833,7 +833,8 @@
const lldb_private::RegisterInfo *
DynamicRegisterInfo::GetRegisterInfo(llvm::StringRef reg_name) const {
for (auto ®_info : m_regs)
- if (reg_info.name == reg_name)
+ if (reg_info.name == reg_name ||
+ (reg_info.alt_name && reg_info.alt_name == reg_name))
return ®_info;
return nullptr;
}
Index: lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
===================================================================
--- lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
+++ lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
@@ -445,6 +445,10 @@
if (GetGDBServerRegisterInfo(arch_to_use))
return;
+ // We have to make a temporary ABI here, and not use the GetABI because
+ // this code gets called in DidAttach, when the target architecture
+ // (and consequently the ABI we'll get from the process) may be wrong.
+ ABISP abi_sp = ABI::FindPlugin(shared_from_this(), arch_to_use);
char packet[128];
std::vector<RemoteRegisterInfo> registers;
uint32_t reg_num = 0;
@@ -557,6 +561,8 @@
}
// At this point, we can finalize our register info.
+ if (abi_sp)
+ abi_sp->PreFinalizeDynamicRegisterInfo(*m_register_info_sp);
m_register_info_sp->Finalize(GetTarget().GetArchitecture());
}
@@ -4545,6 +4551,8 @@
m_register_info_sp->AddRegister(reg_info, remote_reg_info.set_name);
};
+ if (abi_sp)
+ abi_sp->PreFinalizeDynamicRegisterInfo(*m_register_info_sp);
m_register_info_sp->Finalize(arch_to_use);
}
Index: lldb/source/Plugins/ABI/AArch64/ABIAArch64.h
===================================================================
--- lldb/source/Plugins/ABI/AArch64/ABIAArch64.h
+++ lldb/source/Plugins/ABI/AArch64/ABIAArch64.h
@@ -32,6 +32,8 @@
uint32_t GetGenericNum(llvm::StringRef name) override;
void AugmentRegisterInfo(lldb_private::RegisterInfo &info) override;
+ void PreFinalizeDynamicRegisterInfo(
+ lldb_private::DynamicRegisterInfo &info) override;
using lldb_private::MCBasedABI::MCBasedABI;
};
Index: lldb/source/Plugins/ABI/AArch64/ABIAArch64.cpp
===================================================================
--- lldb/source/Plugins/ABI/AArch64/ABIAArch64.cpp
+++ lldb/source/Plugins/ABI/AArch64/ABIAArch64.cpp
@@ -78,3 +78,60 @@
if (!strcmp(info.name, "sp") && !info.alt_name)
info.alt_name = "x31";
}
+
+static void AddPartialRegister(lldb_private::DynamicRegisterInfo &info,
+ const lldb_private::RegisterInfo *full_reg,
+ uint32_t full_reg_size,
+ const std::string &partial_reg_name,
+ uint32_t partial_reg_size,
+ lldb::Encoding encoding, lldb::Format format,
+ uint32_t &next_regnum_lldb) {
+ if (!full_reg || full_reg->byte_size != full_reg_size)
+ return;
+ if (info.GetRegisterInfo(partial_reg_name))
+ return;
+
+ lldb_private::ConstString group{"partial registers"};
+
+ lldb_private::ConstString partial_reg_name_const{partial_reg_name};
+ uint32_t value_regs[] = {
+ full_reg->kinds[lldb::eRegisterKindProcessPlugin],
+ LLDB_INVALID_REGNUM,
+ };
+
+ struct lldb_private::RegisterInfo partial_reg {
+ partial_reg_name_const.AsCString(),
+ nullptr, partial_reg_size, LLDB_INVALID_INDEX32, encoding, format,
+ {
+ LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
+ LLDB_INVALID_REGNUM, next_regnum_lldb++,
+ },
+ value_regs, nullptr, nullptr, 0
+ };
+
+ info.AddSupplementaryRegister(partial_reg, group);
+}
+
+void ABIAArch64::PreFinalizeDynamicRegisterInfo(
+ lldb_private::DynamicRegisterInfo &info) {
+ uint32_t next_regnum_lldb = info.GetNumRegisters();
+
+ // Create aliases for partial registers: wN for xN, and sN/dN for vN.
+ for (int i = 0; i < 32; i++)
+ AddPartialRegister(info,
+ info.GetRegisterInfo(llvm::formatv("x{0}", i).str()), 8,
+ llvm::formatv("w{0}", i), 4, lldb::eEncodingUint,
+ lldb::eFormatHex, next_regnum_lldb);
+
+ for (int i = 0; i < 32; i++)
+ AddPartialRegister(info,
+ info.GetRegisterInfo(llvm::formatv("v{0}", i).str()), 16,
+ llvm::formatv("s{0}", i), 4, lldb::eEncodingIEEE754,
+ lldb::eFormatFloat, next_regnum_lldb);
+
+ for (int i = 0; i < 32; i++)
+ AddPartialRegister(info,
+ info.GetRegisterInfo(llvm::formatv("v{0}", i).str()), 16,
+ llvm::formatv("d{0}", i), 8, lldb::eEncodingIEEE754,
+ lldb::eFormatFloat, next_regnum_lldb);
+}
Index: lldb/include/lldb/Target/ABI.h
===================================================================
--- lldb/include/lldb/Target/ABI.h
+++ lldb/include/lldb/Target/ABI.h
@@ -11,6 +11,7 @@
#include "lldb/Core/PluginInterface.h"
#include "lldb/Symbol/UnwindPlan.h"
+#include "lldb/Target/DynamicRegisterInfo.h"
#include "lldb/Utility/Status.h"
#include "lldb/lldb-private.h"
@@ -128,6 +129,9 @@
llvm::MCRegisterInfo &GetMCRegisterInfo() { return *m_mc_register_info_up; }
virtual void AugmentRegisterInfo(RegisterInfo &info) = 0;
+ // Routine called before DynamicRegisterInfo::Finalize().
+ virtual void
+ PreFinalizeDynamicRegisterInfo(lldb_private::DynamicRegisterInfo &info) {}
virtual bool GetPointerReturnRegister(const char *&name) { return false; }
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