- LibUnwind: Create a replacement for the stack unwinding library facilities in libgcc.a
- Analyze the Itanium exception handling ABI and the i386 System V processor specific ABI for the expected
_Unwind_*definitions - Implement Base ABI
- Using SJLJ exceptions? (gross!)
- Using DWARF .eh_frame Common Frame Information exceptions (modern!)
- Create custom implementation of personality routine
__gxx_personality_v0(if .eh_frame_hdr) or__gxx_personality_sj0(if using setjump/longjump)
- Configure GCC to use
--with-system-libunwindso that it doesn't build_Unwind_*symbols into libgcc.a
- Analyze the Itanium exception handling ABI and the i386 System V processor specific ABI for the expected
- LibC: Implement Itanium C++ abi for exception throwing and catching
- Analyze Itanium exception handling ABI part II for what
__cxa_*methods are required - Look into what Itanium ABI methods are required to support type info?
- Implement whatever is necessary to make RTTI work.
- Make it possible to call __cxa_throw, __cxa_begin_catch, __cxa_unexpected, etc
- Analyze Itanium exception handling ABI part II for what
- LibDebug: Parse CIEs and FDEs from .eh_frame and .debug_frame ELF sections
- Note that .eh_frame uses version 1 and .debug_frame uses version pick-your-favorite-DWARF-revision (4?)
- Parse EH Frame header or debug frame header using ByteBuffers into a list of Common Information Entries and Frame Description Entries
- Identify all the common frame state machine instructions that the exception info and debug info sections are telling us to do in all these CIE objects
- Make a parser/execution state machine for running the important frame instructions on a frame
- Fold into backtrace capability for LibDebug, and better exception handling
SerenityOS / serenity
The Serenity Operating System 🐞
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