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From: Laurent Vivier <1881450@bugs.launchpad.net>
To: qemu-devel@nongnu.org
Subject: [Bug 1881450] Re: Emulation of a math function fails for m68k Linux user mode
Date: Sun, 31 May 2020 06:49:31 -0000	[thread overview]
Message-ID: <159090777188.13999.5111647128737860570.launchpad@soybean.canonical.com> (raw)
In-Reply-To: 159088695339.29529.1797786788240960646.malonedeb@chaenomeles.canonical.com

** Changed in: qemu
     Assignee: (unassigned) => Laurent Vivier (laurent-vivier)

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https://bugs.launchpad.net/bugs/1881450

Title:
  Emulation of a math function fails for m68k Linux user mode

Status in QEMU:
  New

Bug description:
  Please check the attached math-example.c file.
  When running the m68k executable under QEMU, it results in an 
  "Illegal instruction" error.
  Other targets don't produce this error.

  Steps to reproduce the bug:

  1. Download the math-example.c attached file.
  2. Compile it by running:
     m68k-linux-gnu-gcc -O2 -static math-example.c -o math-example-m68k -lm
  3. Run the executable with QEMU:
     /build/qemu-5.0.0/build-gcc/m68k-linux-user/qemu-m68k math-example-m68k

  The output of execution is:
     Profiling function expm1f():
     qemu: uncaught target signal 4 (Illegal instruction) - core dumped
     Illegal instruction (core dumped)

  Output when running on other targets:
     Profiling function expm1f():
       Elapsed time: 47 ms
       Control result: 71804.953125

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  parent reply	other threads:[~2020-05-31  6:56 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-31  1:02 [Bug 1881450] [NEW] Emulation of a math function fails for m68k Linux user mode Ahmed Karaman
2020-05-31  1:09 ` [Bug 1881450] " Ahmed Karaman
2020-05-31  6:49 ` Laurent Vivier [this message]
2020-05-31 12:37 ` Laurent Vivier
2020-05-31 13:11 ` Laurent Vivier
2020-05-31 13:13 ` Laurent Vivier
2020-06-02 18:27 ` Laurent Vivier
2020-08-20 14:58 ` Thomas Huth

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