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is_leaf_function fix (Linux)

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Nekotekina 2017-01-22 13:46:05 +03:00 committed by Ivan
parent fb56c14853
commit 7a356d3294
1 changed files with 35 additions and 1 deletions
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36
Utilities/Thread.cpp
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@ -1588,6 +1588,17 @@ bool handle_access_violation(u32 addr, bool is_writing, x64_context* context)
// TODO: allow recovering from a page fault as a feature of PS3 virtual memory
}
#ifdef __linux__
extern "C" struct dwarf_eh_bases
{
void* tbase;
void* dbase;
void* func;
};
extern "C" struct fde* _Unwind_Find_FDE(void* pc, struct dwarf_eh_bases* bases);
#endif
// Detect leaf function
static bool is_leaf_function(u64 rip)
{
@ -1602,10 +1613,33 @@ static bool is_leaf_function(u64 rip)
return uw[0] == 1 && uw[1] == 0 && uw[2] == 0 && uw[3] == 0;
}
// No unwind info implies leaf function
return true;
#elif __linux__
struct dwarf_eh_bases bases;
if (struct fde* f = _Unwind_Find_FDE(reinterpret_cast<void*>(rip), &bases))
{
const auto words = (const u32*)f;
if (words[0] < 0x14)
{
return true;
}
if (words[0] == 0x14 && !words[3] && !words[4])
{
return true;
}
// TODO
return false;
}
// No unwind info implies leaf function
return true;
#else
// TODO
// Unsupported
return false;
#endif
}