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Kernel+LibCoreDump: Implement more x86_64 coredump functionality
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parent
d3127efc01
commit
2016354c12
4 changed files with 38 additions and 18 deletions
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@ -43,6 +43,10 @@ static const ELFObjectInfo* object_info_for_region(const ELF::Core::MemoryRegion
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return nullptr;
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auto image = make<ELF::Image>(file_or_error.value()->bytes());
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#if !ARCH(I386)
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// FIXME: Fix LibDebug
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return nullptr;
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#endif
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auto info = make<ELFObjectInfo>(file_or_error.release_value(), make<Debug::DebugInfo>(move(image)));
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auto* info_ptr = info.ptr();
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s_debug_info_cache.set(path, move(info));
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@ -52,30 +56,33 @@ static const ELFObjectInfo* object_info_for_region(const ELF::Core::MemoryRegion
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Backtrace::Backtrace(const Reader& coredump, const ELF::Core::ThreadInfo& thread_info)
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: m_thread_info(move(thread_info))
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{
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FlatPtr* bp;
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FlatPtr* ip;
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#if ARCH(I386)
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uint32_t* ebp = (uint32_t*)m_thread_info.regs.ebp;
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uint32_t* eip = (uint32_t*)m_thread_info.regs.eip;
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bp = (FlatPtr*)m_thread_info.regs.ebp;
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ip = (FlatPtr*)m_thread_info.regs.eip;
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#else
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bp = (FlatPtr*)m_thread_info.regs.rbp;
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ip = (FlatPtr*)m_thread_info.regs.rip;
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#endif
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bool first_frame = true;
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while (ebp && eip) {
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while (bp && ip) {
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// We use eip - 1 because the return address from a function frame
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// is the instruction that comes after the 'call' instruction.
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// However, because the first frame represents the faulting
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// instruction rather than the return address we don't subtract
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// 1 there.
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VERIFY((FlatPtr)eip > 0);
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add_entry(coredump, (FlatPtr)eip - (first_frame ? 0 : 1));
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VERIFY((FlatPtr)ip > 0);
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add_entry(coredump, (FlatPtr)ip - (first_frame ? 0 : 1));
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first_frame = false;
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auto next_eip = coredump.peek_memory((FlatPtr)(ebp + 1));
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auto next_ebp = coredump.peek_memory((FlatPtr)(ebp));
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if (!next_eip.has_value() || !next_ebp.has_value())
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auto next_ip = coredump.peek_memory((FlatPtr)(bp + 1));
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auto next_bp = coredump.peek_memory((FlatPtr)(bp));
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if (!next_ip.has_value() || !next_bp.has_value())
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break;
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eip = (uint32_t*)next_eip.value();
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ebp = (uint32_t*)next_ebp.value();
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ip = (FlatPtr*)next_ip.value();
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bp = (FlatPtr*)next_bp.value();
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}
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#else
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(void)coredump;
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TODO();
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#endif
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}
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Backtrace::~Backtrace()
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@ -96,9 +103,14 @@ void Backtrace::add_entry(const Reader& coredump, FlatPtr eip)
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if (!object_info)
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return;
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#if ARCH(I386)
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auto function_name = object_info->debug_info->elf().symbolicate(eip - region->region_start);
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auto source_position = object_info->debug_info->get_source_position_with_inlines(eip - region->region_start);
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#else
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// FIXME: Fix symbolication.
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auto function_name = "";
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Debug::DebugInfo::SourcePositionWithInlines source_position;
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#endif
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m_entries.append({ eip, object_name, function_name, source_position });
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}
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