Re: Illegal instruction (core dumped)
- Reply: Konstantin Belousov : "Re: Illegal instruction (core dumped)"
- In reply to: Konstantin Belousov : "Re: Illegal instruction (core dumped)"
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Date: Sat, 28 Jun 2025 23:23:01 UTC
On Sun, 29 Jun 2025, Konstantin Belousov wrote: > On Sat, Jun 28, 2025 at 05:32:17PM +0000, Bjoern A. Zeeb wrote: >> Hi, >> >> happened in one of my dev VMs: >> >> # more /etc/wpa_supplicant.conf Illegal instruction (core dumped) >> >> As I see nothing in UPDATING in the range from HEAD to the commit I >> rebased --onto b93161a7e38d (downgrade of the kernel) that would >> explain this I am wondering. >> >> >> Mounted the disk image from the base system and checked the core: >> >> Program terminated with signal SIGILL, Illegal instruction. >> (gdb) where >> #0 0x00003fabd04ebeed in tgetflag_sp (sp=0x3fa3ad42f3a0 <get_term[termbuf]>, id=0x3fa3ad42f3a0 <get_term[termbuf]> "") at /usr/src/contrib/ncurses/ncurses/tinfo/lib_termcap.c:259 >> #1 0x00003fa3ad404e9e in get_term () at /usr/src/contrib/less/screen.c:1256 >> #2 0x00003fa3ad4042ef in main (argc=1, argv=0x3fabce1f26b8) at /usr/src/contrib/less/main.c:344 >> > > What is the instruction that faulted? > Also show the registers values used by the instruction. I am a bit rusty with this user spaec stuff ;-) Hope the below helps. (gdb) display/i $pc 1: x/i $pc => 0x3fabd04ebeed <tgetflag_sp+29>: cmove %rbx,%rcx (gdb) info f Stack level 0, frame at 0x3fabce1f25b0: rip = 0x3fabd04ebeed in tgetflag_sp (/usr/src/src.pecunia/contrib/ncurses/ncurses/tinfo/lib_termcap.c:259); saved rip = 0x3fa3ad404e9e called by frame at 0x3fabce1f2600 source language c. Arglist at 0x3fabce1f25a0, args: sp=0x3fa3ad42f3a0 <get_term[termbuf]>, id=0x3fa3ad42f3a0 <get_term[termbuf]> "" Locals at 0x3fabce1f25a0, Previous frame's sp is 0x3fabce1f25b0 Saved registers: rbx at 0x3fabce1f2590, rbp at 0x3fabce1f25a0, r14 at 0x3fabce1f2598, rip at 0x3fabce1f25a8 (gdb) info r rax 0x3fabd04fec30 70007166856240 rbx 0x3fabce1f4cb8 70007130115256 rcx 0xd00b620ed25bfd23 -3455560473278415581 rdx 0x3fabce1f2aaa 70007130106538 rsi 0x3fa3ad42f3a0 69972219065248 rdi 0x3fa3ad42f3a0 69972219065248 rbp 0x3fabce1f25a0 0x3fabce1f25a0 rsp 0x3fabce1f25a0 0x3fabce1f25a0 r8 0x11 17 r9 0x3 3 r10 0x10 16 r11 0x40 64 r12 0x3fabd145be60 70007182966368 r13 0x2 2 r14 0x3fa3ad43bab8 69972219116216 r15 0x1 1 rip 0x3fabd04ebeed 0x3fabd04ebeed <tgetflag_sp+29> eflags 0x10202 [ IF RF ] cs 0x43 67 ss 0x3b 59 ds 0x3b 59 es 0x3b 59 fs 0x13 19 gs 0x1b 27 fs_base 0x467b85825120 77496334831904 gs_base 0x0 0 | 0x3fabd04ebed7 <tgetflag_sp+7> test %rdi,%rdi | | 0x3fabd04ebeda <tgetflag_sp+10> je 0x3fabd04ebef3 <tgetflag_sp+35> | | 0x3fabd04ebedc <tgetflag_sp+12> mov 0x30(%rdi),%rcx | | 0x3fabd04ebee0 <tgetflag_sp+16> test %rcx,%rcx | | 0x3fabd04ebee3 <tgetflag_sp+19> mov 0x10d6e(%rip),%rax # 0x3fabd04fcc58 | | 0x3fabd04ebeea <tgetflag_sp+26> mov (%rax),%rbx | | >0x3fabd04ebeed <tgetflag_sp+29> cmove %rbx,%rcx | | 0x3fabd04ebef1 <tgetflag_sp+33> jmp 0x3fabd04ebf00 <tgetflag_sp+48> | | 0x3fabd04ebef3 <tgetflag_sp+35> mov 0x10d5e(%rip),%rax # 0x3fabd04fcc58 | | 0x3fabd04ebefa <tgetflag_sp+42> mov (%rax),%rbx | | 0x3fabd04ebefd <tgetflag_sp+45> mov %rbx,%rcx | | 0x3fabd04ebf00 <tgetflag_sp+48> xor %eax,%eax | | 0x3fabd04ebf02 <tgetflag_sp+50> test %rcx,%rcx | | 0x3fabd04ebf05 <tgetflag_sp+53> je 0x3fabd04ebfe6 <tgetflag_sp+278> | | 0x3fabd04ebf0b <tgetflag_sp+59> cmpb $0x0,(%rsi) | | 0x3fabd04ebf0e <tgetflag_sp+62> je 0x3fabd04ebfe6 <tgetflag_sp+278> | | 0x3fabd04ebf14 <tgetflag_sp+68> cmpb $0x0,0x1(%rsi) | | 0x3fabd04ebf18 <tgetflag_sp+72> je 0x3fabd04ebfe6 <tgetflag_sp+278> | -- Bjoern A. Zeeb r15:7