diff --git a/lldb/docs/index.rst b/lldb/docs/index.rst index fb5d5341b2f31..bbf6a84d34d9e 100644 --- a/lldb/docs/index.rst +++ b/lldb/docs/index.rst @@ -74,7 +74,7 @@ are welcome: * iOS, tvOS, and watchOS device debugging on ARM and AArch64 * Linux user-space debugging for i386, x86_64, ARM, AArch64, PPC64le, s390x * FreeBSD user-space debugging for i386, x86_64, ARM, AArch64, PPC -* FreeBSD kernel debugging for i386, x86_64, ARM, AArch64 +* FreeBSD kernel debugging for i386, x86_64, ARM, AArch64, PPC64le * NetBSD user-space debugging for i386 and x86_64 * Windows user-space debugging for i386, x86_64, ARM and AArch64 (*) diff --git a/lldb/source/Plugins/Process/FreeBSD-Kernel-Core/CMakeLists.txt b/lldb/source/Plugins/Process/FreeBSD-Kernel-Core/CMakeLists.txt index 1cb96b7c3f523..971e32cb7cc8a 100644 --- a/lldb/source/Plugins/Process/FreeBSD-Kernel-Core/CMakeLists.txt +++ b/lldb/source/Plugins/Process/FreeBSD-Kernel-Core/CMakeLists.txt @@ -3,6 +3,7 @@ add_lldb_library(lldbPluginProcessFreeBSDKernelCore PLUGIN RegisterContextFreeBSDKernelCore_arm.cpp RegisterContextFreeBSDKernelCore_arm64.cpp RegisterContextFreeBSDKernelCore_i386.cpp + RegisterContextFreeBSDKernelCore_ppc64le.cpp RegisterContextFreeBSDKernelCore_x86_64.cpp ThreadFreeBSDKernelCore.cpp diff --git a/lldb/source/Plugins/Process/FreeBSD-Kernel-Core/RegisterContextFreeBSDKernelCore_ppc64le.cpp b/lldb/source/Plugins/Process/FreeBSD-Kernel-Core/RegisterContextFreeBSDKernelCore_ppc64le.cpp new file mode 100644 index 0000000000000..69932eaeb4e0b --- /dev/null +++ b/lldb/source/Plugins/Process/FreeBSD-Kernel-Core/RegisterContextFreeBSDKernelCore_ppc64le.cpp @@ -0,0 +1,95 @@ +//===----------------------------------------------------------------------===// +// +// 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 +// +//===----------------------------------------------------------------------===// + +#include "RegisterContextFreeBSDKernelCore_ppc64le.h" + +#include "lldb/Target/Process.h" +#include "lldb/Target/Thread.h" +#include "lldb/Utility/RegisterValue.h" +#include "llvm/Support/Endian.h" + +using namespace lldb; +using namespace lldb_private; + +RegisterContextFreeBSDKernelCore_ppc64le:: + RegisterContextFreeBSDKernelCore_ppc64le( + Thread &thread, lldb_private::RegisterInfoInterface *register_info, + lldb::addr_t pcb_addr) + : RegisterContextPOSIX_ppc64le(thread, 0, register_info), + m_pcb_addr(pcb_addr) {} + +bool RegisterContextFreeBSDKernelCore_ppc64le::ReadRegister( + const RegisterInfo *reg_info, RegisterValue &value) { + if (m_pcb_addr == LLDB_INVALID_ADDRESS) + return false; + + // https://cgit.freebsd.org/src/tree/sys/powerpc/include/pcb.h + struct { + llvm::support::ulittle64_t context[20]; + llvm::support::ulittle64_t cr; + llvm::support::ulittle64_t sp; + llvm::support::ulittle64_t toc; + llvm::support::ulittle64_t lr; + } pcb; + + Status error; + size_t rd = + m_thread.GetProcess()->ReadMemory(m_pcb_addr, &pcb, sizeof(pcb), error); + if (rd != sizeof(pcb)) + return false; + + uint32_t reg = reg_info->kinds[lldb::eRegisterKindLLDB]; + switch (reg) { + case gpr_r1_ppc64le: + // r1 is saved in the sp field + value = pcb.sp; + break; + case gpr_r2_ppc64le: + // r2 is saved in the toc field + value = pcb.toc; + break; + case gpr_r12_ppc64le: + case gpr_r13_ppc64le: + case gpr_r14_ppc64le: + case gpr_r15_ppc64le: + case gpr_r16_ppc64le: + case gpr_r17_ppc64le: + case gpr_r18_ppc64le: + case gpr_r19_ppc64le: + case gpr_r20_ppc64le: + case gpr_r21_ppc64le: + case gpr_r22_ppc64le: + case gpr_r23_ppc64le: + case gpr_r24_ppc64le: + case gpr_r25_ppc64le: + case gpr_r26_ppc64le: + case gpr_r27_ppc64le: + case gpr_r28_ppc64le: + case gpr_r29_ppc64le: + case gpr_r30_ppc64le: + case gpr_r31_ppc64le: + value = pcb.context[reg - gpr_r12_ppc64le]; + break; + case gpr_pc_ppc64le: + case gpr_lr_ppc64le: + // The pc of crashing thread is stored in lr. + value = pcb.lr; + break; + case gpr_cr_ppc64le: + value = pcb.cr; + break; + default: + return false; + } + return true; +} + +bool RegisterContextFreeBSDKernelCore_ppc64le::WriteRegister( + const RegisterInfo *reg_info, const RegisterValue &value) { + return false; +} diff --git a/lldb/source/Plugins/Process/FreeBSD-Kernel-Core/RegisterContextFreeBSDKernelCore_ppc64le.h b/lldb/source/Plugins/Process/FreeBSD-Kernel-Core/RegisterContextFreeBSDKernelCore_ppc64le.h new file mode 100644 index 0000000000000..5895744e6fa3d --- /dev/null +++ b/lldb/source/Plugins/Process/FreeBSD-Kernel-Core/RegisterContextFreeBSDKernelCore_ppc64le.h @@ -0,0 +1,33 @@ +//===----------------------------------------------------------------------===// +// +// 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 +// +//===----------------------------------------------------------------------===// + +#ifndef LLDB_SOURCE_PLUGINS_PROCESS_FREEBSDKERNEL_REGISTERCONTEXTFREEBSDKERNELCORE_PPC64LE_H +#define LLDB_SOURCE_PLUGINS_PROCESS_FREEBSDKERNEL_REGISTERCONTEXTFREEBSDKERNELCORE_PPC64LE_H + +#include "Plugins/Process/Utility/RegisterContextPOSIX_ppc64le.h" +#include "Plugins/Process/elf-core/RegisterUtilities.h" + +class RegisterContextFreeBSDKernelCore_ppc64le + : public RegisterContextPOSIX_ppc64le { +public: + RegisterContextFreeBSDKernelCore_ppc64le( + lldb_private::Thread &thread, + lldb_private::RegisterInfoInterface *register_info, + lldb::addr_t pcb_addr); + + bool ReadRegister(const lldb_private::RegisterInfo *reg_info, + lldb_private::RegisterValue &value) override; + + bool WriteRegister(const lldb_private::RegisterInfo *reg_info, + const lldb_private::RegisterValue &value) override; + +private: + lldb::addr_t m_pcb_addr; +}; + +#endif // LLDB_SOURCE_PLUGINS_PROCESS_FREEBSDKERNEL_REGISTERCONTEXTFREEBSDKERNELCORE_PPC64LE_H diff --git a/lldb/source/Plugins/Process/FreeBSD-Kernel-Core/ThreadFreeBSDKernelCore.cpp b/lldb/source/Plugins/Process/FreeBSD-Kernel-Core/ThreadFreeBSDKernelCore.cpp index 17e0ac8e23e7f..386a2ab29ec24 100644 --- a/lldb/source/Plugins/Process/FreeBSD-Kernel-Core/ThreadFreeBSDKernelCore.cpp +++ b/lldb/source/Plugins/Process/FreeBSD-Kernel-Core/ThreadFreeBSDKernelCore.cpp @@ -16,10 +16,12 @@ #include "Plugins/Process/Utility/RegisterContextFreeBSD_x86_64.h" #include "Plugins/Process/Utility/RegisterInfoPOSIX_arm.h" #include "Plugins/Process/Utility/RegisterInfoPOSIX_arm64.h" +#include "Plugins/Process/Utility/RegisterInfoPOSIX_ppc64le.h" #include "ProcessFreeBSDKernelCore.h" #include "RegisterContextFreeBSDKernelCore_arm.h" #include "RegisterContextFreeBSDKernelCore_arm64.h" #include "RegisterContextFreeBSDKernelCore_i386.h" +#include "RegisterContextFreeBSDKernelCore_ppc64le.h" #include "RegisterContextFreeBSDKernelCore_x86_64.h" using namespace lldb; @@ -70,6 +72,11 @@ ThreadFreeBSDKernelCore::CreateRegisterContextForFrame(StackFrame *frame) { std::make_shared( *this, std::make_unique(arch), m_pcb_addr); break; + case llvm::Triple::ppc64le: + m_thread_reg_ctx_sp = + std::make_shared( + *this, new RegisterInfoPOSIX_ppc64le(arch), m_pcb_addr); + break; case llvm::Triple::x86: m_thread_reg_ctx_sp = std::make_shared( diff --git a/llvm/docs/ReleaseNotes.md b/llvm/docs/ReleaseNotes.md index b8a576b55949c..2bc3cdf61a2e5 100644 --- a/llvm/docs/ReleaseNotes.md +++ b/llvm/docs/ReleaseNotes.md @@ -219,7 +219,7 @@ Changes to LLDB * Support for libfbsdvmcore has been removed. As a result, FreeBSD kernel dump debugging is now only available on FreeBSD hosts. Live kernel debugging through the GDB remote protocol is still available from any platform. -* Support for ARM has been added. +* Support for ARM and PPC64le has been added. * The crashed thread is now automatically selected on start. * Threads are listed in incrmental order by pid then by tid. * Unread kernel messages saved in msgbufp are now printed when lldb starts. This information is printed only