Bug#629009: gcc-4.6: "Illegal instruction (program cc1)" error on i586
Package: gcc-4.6
Version: 4.6.0-10
Severity: important
It seems that gcc-4.6 tries to use some instruction unsupported by my
old Pentium MMX, and gets killed by SIGILL:
% gcc -E - < /dev/null
gcc: internal compiler error: Illegal instruction (program cc1)
Please submit a full bug report, ...
% /usr/lib/gcc/i486-linux-gnu/4.6/cc1
zsh: illegal hardware instruction /usr/lib/gcc/i486-linux-gnu/4.6/cc1
An extra log message:
Illegal instruction occurred at 080db3b2 in /usr/lib/gcc/i486-linux-gnu/4.6/cc1
which brings us to a faulty cmove instruction in main():
...
80db3a7: 81 e2 00 00 00 02 and $0x2000000,%edx
80db3ad: b8 f0 b4 7c 08 mov $0x87cb4f0,%eax
80db3b2: 0f 44 f0 cmove %eax,%esi
80db3b5: eb b9 jmp 80db370 <main+0x80>
80db3b7: 90 nop
080db3b8 <_start>:
80db3b8: 31 ed xor %ebp,%ebp
...
IIRC, cmov instructions aren't supported on my hardware.
I confirm that gcc-4.5 works fine.
-- System Information:
Debian Release: wheezy/sid
APT prefers unstable
APT policy: (500, 'unstable')
Architecture: i386 (i586)
Kernel: Linux 2.6.37.1-grsec
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Versions of packages gcc-4.6 depends on:
ii binutils 2.21.51.20110421-6 The GNU assembler, linker and bina
ii cpp-4.6 4.6.0-10 The GNU C preprocessor
ii gcc-4.6-base 4.6.0-10 The GNU Compiler Collection (base
ii libc6 2.13-4 Embedded GNU C Library: Shared lib
ii libcloog-ppl0 0.15.9-3 the Chunky Loop Generator (runtime
ii libgcc1 1:4.6.0-10 GCC support library
ii libgmp10 2:5.0.1+dfsg-7 Multiprecision arithmetic library
ii libgmpxx4ldbl 2:5.0.1+dfsg-7 Multiprecision arithmetic library
ii libgomp1 4.6.0-10 GCC OpenMP (GOMP) support library
ii libmpc2 0.9-3 multiple precision complex floatin
ii libmpfr4 3.0.1-3 multiple precision floating-point
ii libppl-c4 0.11.2-3 Parma Polyhedra Library (C interfa
ii libppl9 0.11.2-3 Parma Polyhedra Library (runtime l
ii libquadmath0 4.6.0-10 GCC Quad-Precision Math Library
ii zlib1g 1:1.2.3.4.dfsg-3 compression library - runtime
Versions of packages gcc-4.6 recommends:
ii libc6-dev 2.13-4 Embedded GNU C Library: Developmen
Versions of packages gcc-4.6 suggests:
pn binutils-gold <none> (no description available)
pn gcc-4.6-doc <none> (no description available)
pn gcc-4.6-locales <none> (no description available)
pn gcc-4.6-multilib <none> (no description available)
pn libgcc1-dbg <none> (no description available)
pn libgomp1-dbg <none> (no description available)
pn libmudflap0-4.6-dev <none> (no description available)
pn libmudflap0-dbg <none> (no description available)
pn libquadmath0-dbg <none> (no description available)
-- no debconf information
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