/Users/buildslave/jenkins/workspace/coverage/llvm-project/lldb/source/Plugins/ABI/Mips/ABISysV_mips64.h
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1 | | //===-- ABISysV_mips64.h ----------------------------------------*- C++ -*-===// |
2 | | // |
3 | | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | | // See https://llvm.org/LICENSE.txt for license information. |
5 | | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
6 | | // |
7 | | //===----------------------------------------------------------------------===// |
8 | | |
9 | | #ifndef LLDB_SOURCE_PLUGINS_ABI_MIPS_ABISYSV_MIPS64_H |
10 | | #define LLDB_SOURCE_PLUGINS_ABI_MIPS_ABISYSV_MIPS64_H |
11 | | |
12 | | #include "lldb/Target/ABI.h" |
13 | | #include "lldb/lldb-private.h" |
14 | | |
15 | | class ABISysV_mips64 : public lldb_private::RegInfoBasedABI { |
16 | | public: |
17 | 0 | ~ABISysV_mips64() override = default; |
18 | | |
19 | | size_t GetRedZoneSize() const override; |
20 | | |
21 | | bool PrepareTrivialCall(lldb_private::Thread &thread, lldb::addr_t sp, |
22 | | lldb::addr_t functionAddress, |
23 | | lldb::addr_t returnAddress, |
24 | | llvm::ArrayRef<lldb::addr_t> args) const override; |
25 | | |
26 | | bool GetArgumentValues(lldb_private::Thread &thread, |
27 | | lldb_private::ValueList &values) const override; |
28 | | |
29 | | lldb_private::Status |
30 | | SetReturnValueObject(lldb::StackFrameSP &frame_sp, |
31 | | lldb::ValueObjectSP &new_value) override; |
32 | | |
33 | | lldb::ValueObjectSP |
34 | | GetReturnValueObjectImpl(lldb_private::Thread &thread, |
35 | | lldb_private::CompilerType &type) const override; |
36 | | |
37 | | bool |
38 | | CreateFunctionEntryUnwindPlan(lldb_private::UnwindPlan &unwind_plan) override; |
39 | | |
40 | | bool CreateDefaultUnwindPlan(lldb_private::UnwindPlan &unwind_plan) override; |
41 | | |
42 | | bool RegisterIsVolatile(const lldb_private::RegisterInfo *reg_info) override; |
43 | | |
44 | | bool IsSoftFloat(uint32_t fp_flag) const; |
45 | | |
46 | | // The SysV mips ABI requires that stack frames be 16 byte aligned. |
47 | | // When there is a trap handler on the stack, e.g. _sigtramp in userland |
48 | | // code, we've seen that the stack pointer is often not aligned properly |
49 | | // before the handler is invoked. This means that lldb will stop the unwind |
50 | | // early -- before the function which caused the trap. |
51 | | // |
52 | | // To work around this, we relax that alignment to be just word-size |
53 | | // (8-bytes). |
54 | | // Allowing the trap handlers for user space would be easy (_sigtramp) but |
55 | | // in other environments there can be a large number of different functions |
56 | | // involved in async traps. |
57 | 0 | bool CallFrameAddressIsValid(lldb::addr_t cfa) override { |
58 | | // Make sure the stack call frame addresses are 8 byte aligned |
59 | 0 | if (cfa & (8ull - 1ull)) |
60 | 0 | return false; // Not 8 byte aligned |
61 | 0 | if (cfa == 0) |
62 | 0 | return false; // Zero is not a valid stack address |
63 | 0 | return true; |
64 | 0 | } |
65 | | |
66 | 0 | bool CodeAddressIsValid(lldb::addr_t pc) override { |
67 | 0 | if (pc & (4ull - 1ull)) |
68 | 0 | return false; // Not 4 byte aligned |
69 | | |
70 | | // Anything else if fair game.. |
71 | 0 | return true; |
72 | 0 | } |
73 | | |
74 | | const lldb_private::RegisterInfo * |
75 | | GetRegisterInfoArray(uint32_t &count) override; |
76 | | |
77 | | // Static Functions |
78 | | |
79 | | static void Initialize(); |
80 | | |
81 | | static void Terminate(); |
82 | | |
83 | | static lldb::ABISP CreateInstance(lldb::ProcessSP process_sp, const lldb_private::ArchSpec &arch); |
84 | | |
85 | | static lldb_private::ConstString GetPluginNameStatic(); |
86 | | |
87 | | // PluginInterface protocol |
88 | | |
89 | | lldb_private::ConstString GetPluginName() override; |
90 | | |
91 | | protected: |
92 | | void CreateRegisterMapIfNeeded(); |
93 | | |
94 | | lldb::ValueObjectSP |
95 | | GetReturnValueObjectSimple(lldb_private::Thread &thread, |
96 | | lldb_private::CompilerType &ast_type) const; |
97 | | |
98 | | bool RegisterIsCalleeSaved(const lldb_private::RegisterInfo *reg_info); |
99 | | |
100 | | private: |
101 | | using lldb_private::RegInfoBasedABI::RegInfoBasedABI; // Call CreateInstance instead. |
102 | | }; |
103 | | |
104 | | #endif // LLDB_SOURCE_PLUGINS_ABI_MIPS_ABISYSV_MIPS64_H |