[LLVMdev] Exception Tables in latest LLVM (original) (raw)

Yiannis Tsiouris yiannis.tsiouris at gmail.com
Fri Sep 2 07:42:13 PDT 2011

Hey everybody!

I have been using llvm 2.8 (i know ancient history!) for a backend that i was implementing. I have been trying to port my patches to latest llvm (svn build) lately but i have one problem as far as the Exception Handling mechanism is concerned. It seems that there are no Exception Tables generated any more such as the one below:

.section .gcc_except_table,"a", at progbits .align 4 GCC_except_table0: .Lexception0: .byte 255 # @LPStart Encoding = omit .byte 3 # @TType Encoding = udata4 .uleb128 41 # @TType base offset .byte 3 # Call site Encoding = udata4 .uleb128 39 # Call site table length .Lset0 = .Leh_func_begin0-.Leh_func_begin0 # Region start .long .Lset0 .Lset1 = .Ltmp0-.Leh_func_begin0 # Region length .long .Lset1 .long 0 # Landing pad .uleb128 0 # Action .Lset2 = .Ltmp0-.Leh_func_begin0 # Region start .long .Lset2 .Lset3 = .Ltmp1-.Ltmp0 # Region length .long .Lset3 .Lset4 = .Ltmp2-.Leh_func_begin0 # Landing pad .long .Lset4 .uleb128 0 # Action .Lset5 = .Ltmp1-.Leh_func_begin0 # Region start .long .Lset5 .Lset6 = .Leh_func_end0-.Ltmp1 # Region length .long .Lset6 .long 0 # Landing pad .uleb128 0 # Action .align 4

I've searched for this but i couldn't find some documentation about the changes in the EH staff and the documentation on the website is not complete... Is there any way i can force the generation of these tables in current LLVM?

Thanks in advance, Yiannis -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20110902/46ed934b/attachment.html>

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