diff options
Diffstat (limited to 'lldb/source/Plugins/ABI/SysV-x86_64/ABISysV_x86_64.cpp')
| -rw-r--r-- | lldb/source/Plugins/ABI/SysV-x86_64/ABISysV_x86_64.cpp | 151 |
1 files changed, 148 insertions, 3 deletions
diff --git a/lldb/source/Plugins/ABI/SysV-x86_64/ABISysV_x86_64.cpp b/lldb/source/Plugins/ABI/SysV-x86_64/ABISysV_x86_64.cpp index 5c2cd7403ec..3ee0562b7e8 100644 --- a/lldb/source/Plugins/ABI/SysV-x86_64/ABISysV_x86_64.cpp +++ b/lldb/source/Plugins/ABI/SysV-x86_64/ABISysV_x86_64.cpp @@ -17,6 +17,7 @@ #include "lldb/Core/PluginManager.h" #include "lldb/Core/Value.h" #include "lldb/Symbol/ClangASTContext.h" +#include "lldb/Symbol/UnwindPlan.h" #include "lldb/Target/Target.h" #include "lldb/Target/Process.h" #include "lldb/Target/RegisterContext.h" @@ -32,6 +33,8 @@ static const char *pluginName = "ABISysV_x86_64"; static const char *pluginDesc = "System V ABI for x86_64 targets"; static const char *pluginShort = "abi.sysv-x86_64"; + + size_t ABISysV_x86_64::GetRedZoneSize () const { @@ -41,12 +44,17 @@ ABISysV_x86_64::GetRedZoneSize () const //------------------------------------------------------------------ // Static Functions //------------------------------------------------------------------ -lldb_private::ABI * +ABISP ABISysV_x86_64::CreateInstance (const ArchSpec &arch) { + static ABISP g_abi_sp; if (arch.GetTriple().getArch() == llvm::Triple::x86_64) - return new ABISysV_x86_64; - return NULL; + { + if (!g_abi_sp) + g_abi_sp.reset (new ABISysV_x86_64); + return g_abi_sp; + } + return ABISP(); } bool @@ -446,6 +454,143 @@ ABISysV_x86_64::GetReturnValue (Thread &thread, return true; } +bool +ABISysV_x86_64::CreateFunctionEntryUnwindPlan (UnwindPlan &unwind_plan) +{ + uint32_t reg_kind = unwind_plan.GetRegisterKind(); + uint32_t sp_reg_num = LLDB_INVALID_REGNUM; + uint32_t pc_reg_num = LLDB_INVALID_REGNUM; + + switch (reg_kind) + { + case eRegisterKindDWARF: + case eRegisterKindGCC: + sp_reg_num = gcc_dwarf_rsp; + pc_reg_num = gcc_dwarf_rip; + break; + + case eRegisterKindGDB: + sp_reg_num = gdb_rsp; + pc_reg_num = gdb_rip; + break; + + case eRegisterKindGeneric: + sp_reg_num = LLDB_REGNUM_GENERIC_SP; + pc_reg_num = LLDB_REGNUM_GENERIC_PC; + break; + } + + if (sp_reg_num == LLDB_INVALID_REGNUM || + pc_reg_num == LLDB_INVALID_REGNUM) + return false; + + UnwindPlan::Row row; + row.SetCFARegister (sp_reg_num); + row.SetCFAOffset (8); + row.SetRegisterLocationToAtCFAPlusOffset(pc_reg_num, -8, false); + unwind_plan.AppendRow (row); + unwind_plan.SetSourceName (pluginName); + return true; +} + +bool +ABISysV_x86_64::CreateDefaultUnwindPlan (UnwindPlan &unwind_plan) +{ + uint32_t reg_kind = unwind_plan.GetRegisterKind(); + uint32_t fp_reg_num = LLDB_INVALID_REGNUM; + uint32_t sp_reg_num = LLDB_INVALID_REGNUM; + uint32_t pc_reg_num = LLDB_INVALID_REGNUM; + + switch (reg_kind) + { + case eRegisterKindDWARF: + case eRegisterKindGCC: + fp_reg_num = gcc_dwarf_rbp; + sp_reg_num = gcc_dwarf_rsp; + pc_reg_num = gcc_dwarf_rip; + break; + + case eRegisterKindGDB: + fp_reg_num = gdb_rbp; + sp_reg_num = gdb_rsp; + pc_reg_num = gdb_rip; + break; + + case eRegisterKindGeneric: + fp_reg_num = LLDB_REGNUM_GENERIC_FP; + sp_reg_num = LLDB_REGNUM_GENERIC_SP; + pc_reg_num = LLDB_REGNUM_GENERIC_PC; + break; + } + + if (fp_reg_num == LLDB_INVALID_REGNUM || + sp_reg_num == LLDB_INVALID_REGNUM || + pc_reg_num == LLDB_INVALID_REGNUM) + return false; + + UnwindPlan::Row row; + + const int32_t ptr_size = 8; + row.SetCFARegister (LLDB_REGNUM_GENERIC_FP); + row.SetCFAOffset (2 * ptr_size); + row.SetOffset (0); + + row.SetRegisterLocationToAtCFAPlusOffset(fp_reg_num, ptr_size * -2, true); + row.SetRegisterLocationToAtCFAPlusOffset(pc_reg_num, ptr_size * -1, true); + row.SetRegisterLocationToAtCFAPlusOffset(sp_reg_num, ptr_size * 0, true); + + unwind_plan.AppendRow (row); + unwind_plan.SetSourceName ("x86_64 default unwind plan"); + return true; +} + +bool +ABISysV_x86_64::RegisterIsVolatile (const RegisterInfo *reg_info) +{ + return !RegisterIsCalleeSaved (reg_info); +} + +bool +ABISysV_x86_64::RegisterIsCalleeSaved (const RegisterInfo *reg_info) +{ + if (reg_info) + { + // Volatile registers include: rbx, rbp, rsp, r12, r13, r14, r15, rip + const char *name = reg_info->name; + if (name[0] == 'r') + { + switch (name[1]) + { + case '1': // r12, r13, r14, r15 + if (name[2] >= '2' && name[2] <= '5') + return name[3] == '\0'; + break; + + case 'b': // rbp, rbx + if (name[2] == 'p' || name[2] == 'x') + return name[3] == '\0'; + break; + + case 'i': // rip + if (name[2] == 'p') + return name[3] == '\0'; + break; + + case 's': // rsp + if (name[2] == 'p') + return name[3] == '\0'; + break; + + default: + break; + } + } + } + return false; +} + + + void ABISysV_x86_64::Initialize() { |
