[Qemu-devel] [PATCH 0/3] Fix ARM semihosting SYS_HEAPINFO issues

[Peter Maydell <peter.maydell@linaro.org>]

This patchset is intended to fix some problems with the ARM
semihosting SYS_HEAPINFO call. Patch 1 fixes a bug in do_brk()
which meant that using SYS_HEAPINFO tended to result in our
accidentally unmapping the host libc. Patch 2 fixes the
bug https://bugs.launchpad.net/qemu/+bug/656285
by correcting the check for failure of do_brk(). Patch 3
does the same for the equivalent code in m68k-semi.c, but
note that I have only tested that it compiles.

(linux-user/m68k-sim.c also has a suspicious error check
on do_brk(), but since I don't have any specs of what the
simcalls there are supposed to do on error I haven't
attempted to fix this one.)

Peter Maydell (3):
  linux-user: Don't use MAP_FIXED in do_brk()
  arm-semi.c: Use correct check for failure of do_brk()
  m68k-semi.c: Use correct check for failure of do_brk()

 arm-semi.c           |    5 +++--
 linux-user/syscall.c |   29 ++++++++++++++++++++---------
 m68k-semi.c          |    5 +++--
 3 files changed, 26 insertions(+), 13 deletions(-)