Date: Sun, 23 Oct 2011 10:24:12 +0200 From: Roman Divacky <rdivacky@freebsd.org> To: Patrick Lamaiziere <patfbsd@davenulle.org> Cc: FreeBSD Current <freebsd-current@freebsd.org> Subject: Re: 9.0 RC1/Clang / illegal instruction (Signal 4) in gengtype while building cc_tools on i586. Message-ID: <20111023082412.GA74520@freebsd.org> In-Reply-To: <20111022205129.32569ec5@davenulle.org> References: <20111022205129.32569ec5@davenulle.org>
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> Program received signal SIGILL, Illegal instruction. > 0x08048b24 in do_typedef (s=0x80532bf "CUMULATIVE_ARGS", pos=0x805e1a4) > at /usr/src/gnu/usr.bin/cc/cc_tools/../../../../contrib/gcc/gengtype.c:103 > 103 { > > (gdb) disas 0x08048b24 > Dump of assembler code for function do_typedef: > 0x08048b10 <do_typedef+0>: push %ebp > 0x08048b11 <do_typedef+1>: mov %esp,%ebp > 0x08048b13 <do_typedef+3>: push %ebx > 0x08048b14 <do_typedef+4>: push %edi > 0x08048b15 <do_typedef+5>: push %esi > 0x08048b16 <do_typedef+6>: sub $0xc,%esp > 0x08048b19 <do_typedef+9>: mov $0x805e1d4,%edi > 0x08048b1e <do_typedef+14>: mov 0x10(%ebp),%esi > 0x08048b21 <do_typedef+17>: mov 0x8(%ebp),%ebx > 0x08048b24 <do_typedef+20>: nopw %cs:0x0(%eax,%eax,1) LLVM attempts to use an optimal nop sequence when writing N-byte nop, by using these nop instructions static const uint8_t Nops[10][10] = { // nop {0x90}, // xchg %ax,%ax {0x66, 0x90}, // nopl (%[re]ax) {0x0f, 0x1f, 0x00}, // nopl 0(%[re]ax) {0x0f, 0x1f, 0x40, 0x00}, // nopl 0(%[re]ax,%[re]ax,1) {0x0f, 0x1f, 0x44, 0x00, 0x00}, // nopw 0(%[re]ax,%[re]ax,1) {0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00}, // nopl 0L(%[re]ax) {0x0f, 0x1f, 0x80, 0x00, 0x00, 0x00, 0x00}, // nopl 0L(%[re]ax,%[re]ax,1) {0x0f, 0x1f, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00}, // nopw 0L(%[re]ax,%[re]ax,1) {0x66, 0x0f, 0x1f, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00}, // nopw %cs:0L(%[re]ax,%[re]ax,1) {0x66, 0x2e, 0x0f, 0x1f, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00}, }; There's no checking for a supported CPU, is it so that AMD geode doesnt support any of these? Any other cpu that doesnt support these? If this is CPU dependant, I suggest to open a bug report upstream as it's a bug. roman
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