My native system is x86_64-pc-linux-gnu with a few binfmt_misc handlers wired. Checking other targets I have locally I get the following:
affected targets: - powerpc - powerpc64 - powerpc64le unaffected targets: - arm - arm64 - hppa - sparc probably unaffected: - alpha (maybe it's ok as alpha is not quite an IEEE754 platform) Raw log: $ for gcc in /usr/bin/*-gcc; do rm -f a; $gcc -O2 a.c -Wall -o a -fno- strict-aliasing -fno-stack-protector 2>/dev/null && ./a 2>/dev/null && echo -n "$gcc: " && file a; done | sort 0x1 = 1.401298e-45 : /usr/bin/aarch64-unknown-linux-gnu-gcc: a: ELF 64-bit LSB pie executable, ARM aarch64, version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux-aarch64.so.1, for GNU/Linux 3.7.0, not stripped 0x1 = 1.401298e-45 : /usr/bin/aarch64_be-unknown-linux-gnu-gcc: a: ELF 64-bit MSB pie executable, ARM aarch64, version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux-aarch64_be.so.1, for GNU/Linux 3.7.0, not stripped 0x1 = 1.401298e-45 : /usr/bin/afl-gcc: a: ELF 64-bit LSB pie executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 3.2.0, with debug_info, not stripped 0x1 = 1.401298e-45 : /usr/bin/armv6j-unknown-linux-gnueabihf-gcc: a: ELF 32-bit LSB pie executable, ARM, EABI5 version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux-armhf.so.3, for GNU/Linux 3.2.0, not stripped 0x1 = 1.401298e-45 : /usr/bin/armv7a-unknown-linux-gnueabihf-gcc: a: ELF 32-bit LSB pie executable, ARM, EABI5 version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux-armhf.so.3, for GNU/Linux 3.2.0, not stripped 0x1 = 1.401298e-45 : /usr/bin/hppa-unknown-linux-gnu-gcc: a: ELF 32-bit MSB pie executable, PA-RISC, 1.1 version 1 (GNU/Linux), dynamically linked, interpreter /lib/ld.so.1, for GNU/Linux 3.2.0, with debug_info, not stripped 0x1 = 1.401298e-45 : /usr/bin/hppa2.0-unknown-linux-gnu-gcc: a: ELF 32-bit MSB pie executable, PA-RISC, 1.1 version 1 (GNU/Linux), dynamically linked, interpreter /lib/ld.so.1, for GNU/Linux 3.2.0, with debug_info, not stripped 0x1 = 1.401298e-45 : /usr/bin/m68k-unknown-linux-gnu-gcc: a: ELF 32-bit MSB pie executable, Motorola m68k, 68020, version 1 (SYSV), dynamically linked, interpreter /lib/ld.so.1, for GNU/Linux 3.2.0, not stripped 0x1 = 1.401298e-45 : /usr/bin/mips64-unknown-linux-gnuabin64-gcc: a: ELF 64-bit MSB pie executable, MIPS, MIPS-III version 1 (SYSV), dynamically linked, interpreter /lib64/ld.so.1, for GNU/Linux 3.2.0, not stripped 0x1 = 1.401298e-45 : /usr/bin/riscv64-unknown-linux-gnu-gcc: a: ELF 64-bit LSB pie executable, UCB RISC-V, version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux-riscv64-lp64d.so.1, for GNU/Linux 4.15.0, not stripped 0x1 = 1.401298e-45 : /usr/bin/s390x-unknown-linux-gnu-gcc: a: ELF 64-bit MSB pie executable, IBM S/390, version 1 (SYSV), dynamically linked, interpreter /lib/ld64.so.1, for GNU/Linux 3.2.0, not stripped 0x1 = 1.401298e-45 : /usr/bin/sparc-unknown-linux-gnu-gcc: a: ELF 32-bit MSB pie executable, SPARC32PLUS, V8+ Required, total store ordering, version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux.so.2, for GNU/Linux 3.2.0, not stripped 0x1 = 1.401298e-45 : /usr/bin/x86_64-HEAD-linux-gnu-gcc: a: ELF 64-bit LSB pie executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 3.2.0, not stripped 0x1 = 1.401298e-45 : /usr/bin/x86_64-UNREG-linux-gnu-gcc: a: ELF 64-bit LSB pie executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 3.2.0, not stripped 0x1 = 1.401298e-45 : /usr/bin/x86_64-pc-linux-gnu-gcc: a: ELF 64-bit LSB pie executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 3.2.0, with debug_info, not stripped 0x1 = 2.652494e-315 : /usr/bin/alpha-unknown-linux-gnu-gcc: a: ELF 64-bit LSB pie executable, Alpha (unofficial), version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux.so.2, for GNU/Linux 3.2.0, not stripped 0x1 = 2.802597e-45 : /usr/bin/powerpc-unknown-linux-gnu-gcc: a: ELF 32-bit MSB pie executable, PowerPC or cisco 4500, version 1 (SYSV), dynamically linked, interpreter /lib/ld.so.1, for GNU/Linux 3.2.0, not stripped 0x1 = 2.802597e-45 : /usr/bin/powerpc64-unknown-linux-gnu-gcc: a: ELF 64-bit MSB pie executable, 64-bit PowerPC or cisco 7500, version 1 (SYSV), dynamically linked, interpreter /lib64/ld64.so.1, for GNU/Linux 3.2.0, not stripped 0x1 = 2.802597e-45 : /usr/bin/powerpc64le-unknown-linux-gnu-gcc: a: ELF 64-bit LSB pie executable, 64-bit PowerPC or cisco 7500, version 1 (SYSV), dynamically linked, interpreter /lib64/ld64.so.2, for GNU/Linux 3.10.0, not stripped -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1821444 Title: qemu-ppc (user) incorrectly translates float32 arithmetics Status in QEMU: New Bug description: I'm using qemu-3.1.0 (Gentoo). When I was running regression test suite via qemu-ppc for GHC I noticed a few uint32_t<->float32 failures I did not expect to encounter. Here is an example $ cat a.c #include <stdio.h> #include <stdint.h> int main() { volatile uint32_t i = 1; printf("0x1 = %e\n", *(volatile float*)&i); } $ powerpc-unknown-linux-gnu-gcc -O2 a.c -Wall -o a -fno-strict-aliasing -fno-stack-protector -static && ./a 0x1 = 2.802597e-45 $ scp a timberdoodle.ppc64.dev.gentoo.org:~/ a 100% 826KB 102.0KB/s 00:08 $ ssh timberdoodle.ppc64.dev.gentoo.org ./a 0x1 = 1.401298e-45 $ qemu-ppc ./a 0x1 = 2.802597e-45 Looks like off-by-one bit somewhere. I'm not sure if it's FPU instruction or some internals of printf() that are emulated incorrectly. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1821444/+subscriptions
