dd_rescue causing illegal instruction

**HoagieGunn** · 28-Jan-2014, 01:21

On two machines with "openSUSE 13.1 "Bottle",
dd_rescue (dd_rescue-1.40-2.1.2.i586) is hanging, even when called without any parameters.
strace shows that this is caused by SIGILL:

Code:

execve("/usr/bin/dd_rescue", ["dd_rescue"], [/* 60 vars */]) = 0
brk(0)                                  = 0x94f0000
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7704000
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=106332, ...}) = 0
mmap2(NULL, 106332, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb76ea000
close(3)                                = 0
open("/lib/libdl.so.2", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\320\n\0\0004\0\0\0"..., 512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=17288, ...}) = 0
mmap2(NULL, 16512, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xb76e5000
mmap2(0xb76e8000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0xb76e8000
close(3)                                = 0
open("/lib/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0000\233\1\0004\0\0\0"..., 512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=1978006, ...}) = 0
mmap2(NULL, 1772252, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xb7534000
mmap2(0xb76df000, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1ab000) = 0xb76df000
mmap2(0xb76e2000, 10972, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xb76e2000
close(3)                                = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7533000
set_thread_area({entry_number:-1 -> 6, base_addr:0xb7533700, limit:1048575, seg_32bit:1, contents:0, read_exec_only:0, limit_in_pages:1, seg_not_present:0, useable:1}) = 0
mprotect(0xb76df000, 8192, PROT_READ)   = 0
mprotect(0xb76e8000, 4096, PROT_READ)   = 0
mprotect(0x8055000, 4096, PROT_READ)    = 0
mprotect(0xb7727000, 4096, PROT_READ)   = 0
munmap(0xb76ea000, 106332)              = 0
rt_sigaction(SIGILL, {0x804b000, [ILL], SA_RESTART}, {SIG_DFL, [], 0}, 8) = 0
rt_sigaction(SIGSEGV, {0x804b000, [SEGV], SA_RESTART}, {SIG_DFL, [], 0}, 8) = 0
--- SIGILL {si_signo=SIGILL, si_code=ILL_ILLOPN, si_addr=0x8051480} ---
sigreturn() (mask [])                   = 0
--- SIGILL {si_signo=SIGILL, si_code=ILL_ILLOPN, si_addr=0x8051480} ---
sigreturn() (mask [])                   = 0
--- SIGILL {si_signo=SIGILL, si_code=ILL_ILLOPN, si_addr=0x8051480} ---
sigreturn() (mask [])                   = 0

Machine number one is:

Code:

Linux 3.11.6-4-default #1 SMP Wed Oct 30 18:04:56 UTC 2013 (e6d4a27) i686 athlon i386 GNU/Linux
cat /proc/cpuinfo
processor       : 0
vendor_id       : AuthenticAMD
cpu family      : 6
model           : 4
model name      : AMD Athlon(tm) Processor
stepping        : 2
cpu MHz         : 1208.745
cache size      : 256 KB
fdiv_bug        : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 1
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov pat pse36 mmx fxsr syscall mmxext 3dnowext 3dnow
bogomips        : 2417.49
clflush size    : 32
cache_alignment : 32
address sizes   : 36 bits physical, 32 bits virtual
power management:

Machine number two is:

Code:

Linux 3.11.6-4-default #1 SMP Wed Oct 30 18:04:56 UTC 2013 (e6d4a27) i686 i686 i386 GNU/Linux
cat /proc/cpuinfo
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 7
model name      : Pentium III (Katmai)
stepping        : 3
microcode       : 0x5
cpu MHz         : 548.327
cache size      : 512 KB
fdiv_bug        : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 2
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pse36 mmx fxsr sse
bogomips        : 1096.65
clflush size    : 32
cache_alignment : 32
address sizes   : 36 bits physical, 32 bits virtual
power management:

Is it possible that this version of dd_rescue is compiled for using "sse2" or similar without fallback on older cpus?
And if this is true, why?

**wolfi323** · 28-Jan-2014, 02:44

Originally Posted by HoagieGunn

Is it possible that this version of dd_rescue is compiled for using "sse2" or similar without fallback on older cpus?
And if this is true, why?

Well, it is not explicitely built with SSE2 instructions by openSUSE.
But dd_rescue's Makefile activates optimized SSE2 versions of some functions by default even on 32bit systems.

Please consider filing a bug report at http://bugzilla.novell.com/ (same username/password as here).