https://github.com/mchoo7 created https://github.com/llvm/llvm-project/pull/180669
This is LLDB version of https://cgit.freebsd.org/ports/tree/devel/gdb/files/kgdb/ppcfbsd-kern.c. Trapframe unwinding will be implemented in future. >From afb2e81570c6699c666d3c5f198c1c8c14d711e8 Mon Sep 17 00:00:00 2001 From: Minsoo Choo <[email protected]> Date: Mon, 9 Feb 2026 21:09:42 -0500 Subject: [PATCH] [lldb][Process/FreeBSDKernel] Add ppc64le support Signed-off-by: Minsoo Choo <[email protected]> --- .../Process/FreeBSDKernel/CMakeLists.txt | 1 + .../RegisterContextFreeBSDKernel_ppc64le.cpp | 95 +++++++++++++++++++ .../RegisterContextFreeBSDKernel_ppc64le.h | 33 +++++++ .../FreeBSDKernel/ThreadFreeBSDKernel.cpp | 7 ++ 4 files changed, 136 insertions(+) create mode 100644 lldb/source/Plugins/Process/FreeBSDKernel/RegisterContextFreeBSDKernel_ppc64le.cpp create mode 100644 lldb/source/Plugins/Process/FreeBSDKernel/RegisterContextFreeBSDKernel_ppc64le.h diff --git a/lldb/source/Plugins/Process/FreeBSDKernel/CMakeLists.txt b/lldb/source/Plugins/Process/FreeBSDKernel/CMakeLists.txt index c35b4def24e25..251e8cea784af 100644 --- a/lldb/source/Plugins/Process/FreeBSDKernel/CMakeLists.txt +++ b/lldb/source/Plugins/Process/FreeBSDKernel/CMakeLists.txt @@ -15,6 +15,7 @@ add_lldb_library(lldbPluginProcessFreeBSDKernel PLUGIN ProcessFreeBSDKernel.cpp RegisterContextFreeBSDKernel_arm64.cpp RegisterContextFreeBSDKernel_i386.cpp + RegisterContextFreeBSDKernel_ppc64le.cpp RegisterContextFreeBSDKernel_x86_64.cpp ThreadFreeBSDKernel.cpp diff --git a/lldb/source/Plugins/Process/FreeBSDKernel/RegisterContextFreeBSDKernel_ppc64le.cpp b/lldb/source/Plugins/Process/FreeBSDKernel/RegisterContextFreeBSDKernel_ppc64le.cpp new file mode 100644 index 0000000000000..5fb2908bfdb2c --- /dev/null +++ b/lldb/source/Plugins/Process/FreeBSDKernel/RegisterContextFreeBSDKernel_ppc64le.cpp @@ -0,0 +1,95 @@ +//===-- RegisterContextFreeBSDKernel_ppc64le.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 +// +//===----------------------------------------------------------------------===// + +#include "RegisterContextFreeBSDKernel_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; + +RegisterContextFreeBSDKernel_ppc64le::RegisterContextFreeBSDKernel_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 RegisterContextFreeBSDKernel_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 RegisterContextFreeBSDKernel_ppc64le::WriteRegister( + const RegisterInfo *reg_info, const RegisterValue &value) { + return false; +} diff --git a/lldb/source/Plugins/Process/FreeBSDKernel/RegisterContextFreeBSDKernel_ppc64le.h b/lldb/source/Plugins/Process/FreeBSDKernel/RegisterContextFreeBSDKernel_ppc64le.h new file mode 100644 index 0000000000000..2f90a0e4bce0a --- /dev/null +++ b/lldb/source/Plugins/Process/FreeBSDKernel/RegisterContextFreeBSDKernel_ppc64le.h @@ -0,0 +1,33 @@ +//===-- RegisterContextFreeBSDKernel_ppc64le.h ------------------*- C++ -*-===// +// +// 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_REGISTERCONTEXTFREEBSDKERNEL_PPC64LE_H +#define LLDB_SOURCE_PLUGINS_PROCESS_FREEBSDKERNEL_REGISTERCONTEXTFREEBSDKERNEL_PPC64LE_H + +#include "Plugins/Process/Utility/RegisterContextPOSIX_ppc64le.h" +#include "Plugins/Process/elf-core/RegisterUtilities.h" + +class RegisterContextFreeBSDKernel_ppc64le + : public RegisterContextPOSIX_ppc64le { +public: + RegisterContextFreeBSDKernel_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_REGISTERCONTEXTFREEBSDKERNEL_PPC64LE_H diff --git a/lldb/source/Plugins/Process/FreeBSDKernel/ThreadFreeBSDKernel.cpp b/lldb/source/Plugins/Process/FreeBSDKernel/ThreadFreeBSDKernel.cpp index dd1ed52719749..7f55ea509fb3e 100644 --- a/lldb/source/Plugins/Process/FreeBSDKernel/ThreadFreeBSDKernel.cpp +++ b/lldb/source/Plugins/Process/FreeBSDKernel/ThreadFreeBSDKernel.cpp @@ -15,9 +15,11 @@ #include "Plugins/Process/Utility/RegisterContextFreeBSD_i386.h" #include "Plugins/Process/Utility/RegisterContextFreeBSD_x86_64.h" #include "Plugins/Process/Utility/RegisterInfoPOSIX_arm64.h" +#include "Plugins/Process/Utility/RegisterInfoPOSIX_ppc64le.h" #include "ProcessFreeBSDKernel.h" #include "RegisterContextFreeBSDKernel_arm64.h" #include "RegisterContextFreeBSDKernel_i386.h" +#include "RegisterContextFreeBSDKernel_ppc64le.h" #include "RegisterContextFreeBSDKernel_x86_64.h" using namespace lldb; @@ -62,6 +64,11 @@ ThreadFreeBSDKernel::CreateRegisterContextForFrame(StackFrame *frame) { *this, std::make_unique<RegisterInfoPOSIX_arm64>(arch, 0), m_pcb_addr); break; + case llvm::Triple::ppc64le: + m_thread_reg_ctx_sp = + std::make_shared<RegisterContextFreeBSDKernel_ppc64le>( + *this, new RegisterInfoPOSIX_ppc64le(arch), m_pcb_addr); + break; case llvm::Triple::x86: m_thread_reg_ctx_sp = std::make_shared<RegisterContextFreeBSDKernel_i386>( *this, new RegisterContextFreeBSD_i386(arch), m_pcb_addr); _______________________________________________ lldb-commits mailing list [email protected] https://lists.llvm.org/cgi-bin/mailman/listinfo/lldb-commits
