#10375: arm: ghci hits an illegal instruction -------------------------------------+------------------------------------- Reporter: erikd | Owner: Type: bug | Status: new Priority: high | Milestone: 7.10.3 Component: Runtime System | Version: 7.10.1 (Linker) | Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: arm Type of failure: GHCi crash | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Revisions: -------------------------------------+------------------------------------- Comment (by erikd): Added some debug to `rts/Linker.c` to print anything related to the function `hSetBuffering` and get: {{{ GHCi, version 7.11.20150912: http://www.haskell.org/ghc/ :? for help HSbase-4.8.2.0-FkKrfrxMoa06H6w6uNoJiJ.o, nentires 414047, section 1, symtab 14, strtab 15 base_GHCziIOziHandle_hSetBuffering1_entry is 0xb3eb63cd, is_thumb 1, R_ARM_THM_MOVW_ABS_NC base_GHCziIOziHandle_hSetBuffering1_entry is 0xb3eb63cd, is_thumb 1, R_ARM_THM_MOVT_ABS HSbase-4.8.2.0-FkKrfrxMoa06H6w6uNoJiJ.o, nentires 103794, section 2, symtab 14, strtab 15 base_GHCziIOziHandle_hSetBuffering1_info is 0xb4198738, is_thumb 0, R_ARM_ABS32 base_GHCziIOziHandle_hSetBuffering1_closure is 0xb41965b0, is_thumb 0, R_ARM_ABS32 base_GHCziIOziHandle_hSetBuffering_entry is 0xb3eb6471, is_thumb 1, R_ARM_ABS32 base_GHCziIOziHandle_hSetBuffering_info is 0xb4198718, is_thumb 0, R_ARM_ABS32 base_GHCziIOziHandle_hSetBuffering1_entry is 0xb3eb63cd, is_thumb 1, R_ARM_ABS32 turnOffBuffering start turnOffBuffering middle Illegal instruction }}} Not sure why `base_GHCziIOziHandle_hSetBuffering1_entry` has 3 entries, all with the same address, but with different `ELF_R_TYPE` types, ie `R_ARM_THM_MOVW_ABS_NC`, `R_ARM_THM_MOVT_ABS` and `R_ARM_THM_MOVT_ABS`. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10375#comment:49 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler