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Add elf_local_rip to UnwindContext (debug tool)

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This commit is contained in:
Théophile Bastian 2018-04-12 13:24:31 +02:00
parent 4369a4f3cc
commit 242bfce9e1
2 changed files with 14 additions and 0 deletions
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9
include/dwarfinterpret/DwarfInterpret.hpp
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@ -107,6 +107,9 @@ class DwarfInterpret {
uintptr_t rip; uintptr_t rip;
uintptr_t rsp; uintptr_t rsp;
uintptr_t rbp; uintptr_t rbp;
/// This context's `RIP` minus its ELF file load offset
uintptr_t elf_local_rip() const;
}; };
public: // methods public: // methods
@ -180,6 +183,12 @@ class DwarfInterpret {
*/ */
UnwindContext unwind_context(const UnwindContext& ctx); UnwindContext unwind_context(const UnwindContext& ctx);
/** Get the offset for the instruction pointer.
*
* This offset is such that `actual_rip - pc_offset` is the ELF-local
* PC (ie. what readelf gives). */
uintptr_t get_pc_offset() const { return pc_offset; }
private: private:
DwarfInterpret(const MemoryMap::MapEntry& memory_object); DwarfInterpret(const MemoryMap::MapEntry& memory_object);

5
src/DwarfInterpret.cpp
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@ -36,6 +36,11 @@ using namespace dwarf;
MemoryMap DwarfInterpret::memory_map; MemoryMap DwarfInterpret::memory_map;
map<int, unique_ptr<DwarfInterpret> > DwarfInterpret::instances; map<int, unique_ptr<DwarfInterpret> > DwarfInterpret::instances;
uintptr_t DwarfInterpret::UnwindContext::elf_local_rip() const {
return rip - DwarfInterpret::acquire(rip).get_pc_offset();
}
DwarfInterpret::DwarfInterpret(const MemoryMap::MapEntry& memory_object) DwarfInterpret::DwarfInterpret(const MemoryMap::MapEntry& memory_object)
: map_entry(memory_object) : map_entry(memory_object)
{ {