Single-stepping branches on MIPS didn't work right, because the
generation of EXCP_DEBUG happened after the generation of the code to
exit the current TB.  That is, given the code:

    bne v0,v1,target
    nop
    ...
  target:
    addu v0,v0,v1
  1:

when you single-stepped through the NOP, execution wouldn't actually
halt until you reached the label `1'.

This patch corrects that and also changes single-stepping so that a
branch and its delay slot are executed as one instruction for the
purposes of single-stepping.  This behavior is comparable to what other
MIPS tools (e.g. MIPSsim with MDI) do.  GDB avoids placing breakpoints
in branch delay slots, so this change doesn't break anything on the GDB
side.
Signed-off-by: NNathan Froyd <froydnj@codesourcery.com>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

Changes:
  * added isa bus, hooked up to the system bus. Not sure this is correct,
    but 'info pci' lists lists no pci-isa bridge in the machine ...).
  * switches the default cpu to one which actually works.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

Many thanks to Gerd Hoffmann for finding and fixing a bug in the initial
version.
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

Recent versions of the Linux kernel will not preempt CPU-intensive
tasks unless the clock used by sched_clock() works.  On -M versatilepb
that's the 24MHz timer in the system controller.  It's a very simple
timer, so implement it.
Signed-off-by: NDaniel Jacobowitz <dan@codesourcery.com>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

Signed-off-by: NEdgar E. Iglesias <edgar.iglesias@gmail.com>

Signed-off-by: Nmalc <av1474@comtv.ru>

Signed-off-by: Nmalc <av1474@comtv.ru>

Signed-off-by: Nmalc <av1474@comtv.ru>

Change "ERROR: configure was not able to found it" to
"ERROR: configure was not able to find it".
Signed-off-by: NSebastian Herbszt <herbszt@gmx.de>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

This reverts commit 91b40c5b.
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

Makes 91b40c5b unnecessary.
Acked-by: NKirill A. Shutemov <kirill@shutemov.name>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

Signed-off-by: NJan Kiszka <jan.kiszka@web.de>
Signed-off-by: Nmalc <av1474@comtv.ru>

While i386, x86_64 and Sparc64/OpenBSD still worked after
df70204d, Sparc32 and Sparc64 Linux hosts
broke.

Partially revert the commit: make the restored code conditional to
!CONFIG_USER_PIE.
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

Signed-off-by: Nmalc <av1474@comtv.ru>

a. Use SNDCTL_DSP_POLICY instead of SNDCTL_DSP_SETFRAGMENT
b. Add ability to open device in exclusive mode, thus bypassing vmix
Signed-off-by: Nmalc <av1474@comtv.ru>

cpu_synchronize_state already does this.
Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

Signed-off-by: NReimar Döffinger <Reimar.Doeffinger@gmx.de>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

Build uset targers as true PIE if user want to keep qemu
self-virtualizable.

v5:
  - Split into to patches: drop link hack and add PIE support
  - do not build PIE by default and drop toolchain check

v4:
  - Add test for toolchain if it has proper PIE support

v3:
  - One more pice of the hack was removed
  - Description updated

v2:
  - Add configure options do enable/disable PIE for usermode targets.
    Disabling can be useful if you build uswing toolchain which has
    broken PIE support. PIE for usermode targets enabled by default.
Signed-off-by: NKirill A. Shutemov <kirill@shutemov.name>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

There is a link hack in linux-user which produces an executable that
looks like PIE, but always has text relocations since all object files
isn't position-independent (compiled without -fpic/-fpie). Dynamic loader
has to do more work to load a binary with text relocations.

The best way to keep this functionality is to build a true PIE without
text relocations.
Signed-off-by: NKirill A. Shutemov <kirill@shutemov.name>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

Usermode targets are hardware-independed.
Signed-off-by: NKirill A. Shutemov <kirill@shutemov.name>
Acked-by: NJuan Quintela <quintela@redhat.com>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

We need to define _XOPEN_SOURCE and __EXTENSIONS__ macros in order to get
CMSG_ and TIOCWIN macros defined. But then _POSIX_C_SOURCE gets defined, which
is (incorrectly) used as an indicator for existence of posix_memalign() in osdep.c.
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

Problem: Our file sys-queue.h is a copy of the BSD file, but there are
some additions and it's not entirely compatible. Because of that, there have
been conflicts with system headers on BSD systems. Some hacks have been
introduced in the commits 15cc9235,
f40d7537,
96555a96 and
3990d09a but the fixes were fragile.

Solution: Avoid the conflict entirely by renaming the functions and the
file. Revert the previous hacks.
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

And untabify this while we are at it.
Signed-off-by: Nmalc <av1474@comtv.ru>

Signed-off-by: Nmalc <av1474@comtv.ru>

Signed-off-by: Nmalc <av1474@comtv.ru>

Signed-off-by: Nmalc <av1474@comtv.ru>

Signed-off-by: Nmalc <av1474@comtv.ru>

Signed-off-by: Nmalc <av1474@comtv.ru>