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[Qemu-devel] [Bug 1528718] Re: Initial monitor does not output anything


From: Dravion Smith
Subject: [Qemu-devel] [Bug 1528718] Re: Initial monitor does not output anything on Windows (MSYS2 binary)
Date: Tue, 10 May 2016 18:00:42 -0000

This affects both binary editions (for instance "qemu-system-i386.exe"
AND "qemu-system-i386w.exe")

dumpbin /all "C:\Program Files\qemu\qemu-system-i386.exe"|more
Dump of file C:\Program Files\qemu\qemu-system-i386.exe
PE signature found
File Type: EXECUTABLE IMAGE
FILE HEADER VALUES
8664 machine (x64)

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https://bugs.launchpad.net/bugs/1528718

Title:
  Initial monitor does not output anything on Windows (MSYS2 binary)

Status in QEMU:
  New

Bug description:
  When running on Windows error messages before the UI is started are
  not showing up.

  For example when I run:

  qemu-system-i386.exe -L /mingw32/etc/qemu/ -m 20G

  It should display "ram size too large", according to gdb:

  Breakpoint 1, error_report (address@hidden
  <dma_aiocb_info+2426> "ram size too large") at
  C:/build/mingw/mingw-w64-qemu/src/qemu-2.4.0/util/qemu-error.c:233

  However the console does never receive that.

  As far as I could find out vfprintf is called, but it doesn't output
  anything.

  Maybe the binary is build for the "win32" subsystem which does not
  have a console window attached by default?

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