diff options
| -rw-r--r-- | lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_arm.cpp | 45 | ||||
| -rw-r--r-- | lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_arm.h | 11 |
2 files changed, 56 insertions, 0 deletions
diff --git a/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_arm.cpp b/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_arm.cpp index b38d0b46445..754825438f6 100644 --- a/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_arm.cpp +++ b/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_arm.cpp @@ -20,6 +20,10 @@ #define REG_CONTEXT_SIZE (GetGPRSize() + sizeof (m_fpr)) +#ifndef PTRACE_GETVFPREGS + #define PTRACE_GETVFPREGS 27 + #define PTRACE_SETVFPREGS 28 +#endif #ifndef PTRACE_GETHBPREGS #define PTRACE_GETHBPREGS 29 #define PTRACE_SETHBPREGS 30 @@ -853,4 +857,45 @@ NativeRegisterContextLinux_arm::CalculateFprOffset(const RegisterInfo* reg_info) return reg_info->byte_offset - GetRegisterInfoAtIndex(m_reg_info.first_fpr)->byte_offset; } +Error +NativeRegisterContextLinux_arm::DoWriteRegisterValue(uint32_t offset, + const char* reg_name, + const RegisterValue &value) +{ + // PTRACE_POKEUSER don't work in the aarch64 liux kernel used on android devices (always return + // "Bad address"). To avoid using PTRACE_POKEUSER we read out the full GPR register set, modify + // the requested register and write it back. This approach is about 4 times slower but the + // performance overhead is negligible in comparision to processing time in lldb-server. + assert(offset % 4 == 0 && "Try to write a register with unaligned offset"); + if (offset + sizeof(uint32_t) > sizeof(m_gpr_arm)) + return Error("Register isn't fit into the size of the GPR area"); + + Error error = DoReadGPR(m_gpr_arm, sizeof(m_gpr_arm)); + if (error.Fail()) + return error; + + m_gpr_arm[offset / sizeof(uint32_t)] = value.GetAsUInt32(); + return DoWriteGPR(m_gpr_arm, sizeof(m_gpr_arm)); +} + +Error +NativeRegisterContextLinux_arm::DoReadFPR(void *buf, size_t buf_size) +{ + return NativeProcessLinux::PtraceWrapper(PTRACE_GETVFPREGS, + m_thread.GetID(), + nullptr, + buf, + buf_size); +} + +Error +NativeRegisterContextLinux_arm::DoWriteFPR(void *buf, size_t buf_size) +{ + return NativeProcessLinux::PtraceWrapper(PTRACE_SETVFPREGS, + m_thread.GetID(), + nullptr, + buf, + buf_size); +} + #endif // defined(__arm__) diff --git a/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_arm.h b/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_arm.h index 847edd1db25..611b36ad4db 100644 --- a/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_arm.h +++ b/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_arm.h @@ -90,6 +90,17 @@ namespace process_linux { }; protected: + Error + DoWriteRegisterValue(uint32_t offset, + const char* reg_name, + const RegisterValue &value) override; + + Error + DoReadFPR(void *buf, size_t buf_size) override; + + Error + DoWriteFPR(void *buf, size_t buf_size) override; + void* GetGPRBuffer() override { return &m_gpr_arm; } |
