As reported by Laurent, which should use TARGET_SA_ONSTACK
on arm, microblaze and openrisc targets like we do on all
others. Practical matter is minimal as for almost all archs
SA_ONSTACK is 0x08000000:
http://lxr.free-electrons.com/ident?i=SA_ONSTACK
Reported-by: Laurent Desnogues <laurent.desnogues@gmail.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
target_to_host_sockaddr() may increase the lenth with 1 byte
for AF_UNIX sockets so allocate 1 extra byte.
Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Wrong type was used in ioctl definition.
Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
The default, 970fx, doesn't support MSR_LE. So even though we set LE in
ppc_cpu_reset, it gets cleared again in hreg_store_msr. Error out if a
user-selected cpu model doesn't support LE.
Signed-off-by: Richard Henderson <rth@twiddle.net>
[agraf: switch to POWER7 as default for BE and LE]
Signed-off-by: Alexander Graf <agraf@suse.de>
* remotes/riku/linux-user-for-upstream:
linux-user: support the SIOCGIFINDEX ioctl
linux-user: support the KDSIGACCEPT ioctl
linux-user: allow NULL tv argument for settimeofday
linux-user: respect timezone for settimeofday
linux-user: fix struct target_epoll_event layout for MIPS
linux-user: support strace of epoll_create1
linux-user: allow NULL arguments to mount
linux-user: support SO_PASSSEC setsockopt option
linux-user: support SO_{SND, RCV}BUFFORCE setsockopt options
linux-user: support SO_ACCEPTCONN getsockopt option
linux-user: translate the result of getsockopt SO_TYPE
linux-user: added fake open() for /proc/self/cmdline
Add support for MAP_NORESERVE mmap flag.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Add a definition of the SIOCGIFINDEX ioctl, allowing its use by target
programs.
Signed-off-by: Paul Burton <paul@archlinuxmips.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Add a definition of the KDSIGACCEPT ioctl & allow its use by target
programs.
Signed-off-by: Paul Burton <paul@archlinuxmips.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
The tv argument to the settimeofday syscall is allowed to be NULL, if
the program only wishes to provide the timezone. QEMU previously
returned -EFAULT when tv was NULL. Instead, execute the syscall &
provide NULL to the kernel as the target program expected.
Signed-off-by: Paul Burton <paul@archlinuxmips.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
The settimeofday syscall accepts a tz argument indicating the desired
timezone to the kernel. QEMU previously ignored any argument provided
by the target program & always passed NULL to the kernel. Instead,
translate the argument & pass along the data userland provided.
Although this argument is described by the settimeofday man page as
obsolete, it is used by systemd as of version 213.
Signed-off-by: Paul Burton <paul@archlinuxmips.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
MIPS requires the pad field to 64b-align the data field just as ARM
does.
Signed-off-by: Paul Burton <paul@archlinuxmips.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Add the epoll_create1 syscall to strace.list in order to display that
syscall when it occurs, rather than a message about the syscall being
unknown despite QEMU already implementing support for it.
Signed-off-by: Paul Burton <paul@archlinuxmips.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Calls to the mount syscall can legitimately provide NULL as the value
for the source of filesystemtype arguments, which QEMU would previously
reject & return -EFAULT to the target program. An example of this is
remounting an already mounted filesystem with different properties.
Instead of rejecting such syscalls with -EFAULT, pass NULL along to the
kernel as the target program expects.
Additionally this patch fixes a potential memory leak when DEBUG_REMAP
is enabled and lock_user_string fails on the target or filesystemtype
arguments but a prior argument was non-NULL and already locked.
Since the patch already touched most lines of the TARGET_NR_mount case,
it fixes the indentation & coding style for good measure.
Signed-off-by: Paul Burton <paul@archlinuxmips.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Translate the SO_PASSSEC option to setsockopt to the host value &
perform the syscall as expected, allowing use of the option by target
programs.
Signed-off-by: Paul Burton <paul@archlinuxmips.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Translate the SO_SNDBUFFORCE & SO_RCVBUFFORCE options to setsockopt to
the host values & perform the syscall as expected, allowing use of those
options by target programs.
Signed-off-by: Paul Burton <paul@archlinuxmips.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Translate the SO_ACCEPTCONN option to the host value & execute the
syscall as expected.
Signed-off-by: Paul Burton <paul@archlinuxmips.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
QEMU previously passed the result of the host syscall directly to the
target program. This is a problem if the host & target have different
representations of socket types, as is the case when running a MIPS
target program on an x86 host. Introduce a host_to_target_sock_type
helper function mirroring the existing target_to_host_sock_type, and
call it to translate the value provided by getsockopt when called for
the SO_TYPE option.
Signed-off-by: Paul Burton <paul@archlinuxmips.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
mmap_flags_tbl contains a list of mmap flags, and how to map them to
the target. This patch adds MAP_NORESERVE, which was missing to the
list.
Signed-off-by: Christophe Lyon <christophe.lyon@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Set bits in the AT_HWCAP2 entry of the AUXV. Specifically, detect and set bits
for bctar, ISEL and ISA 2.07.
Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Add VSX, DFP and ISA 2.06 to the bits identified in the AT_HWCAP
entry of the AUXV.
Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Set the AT_ICACHEBSIZE and AT_DCACHEBSIZE entries of the AUXV to match the
CPU model's cache line sizes. This fixes memory clobbering problems on more
recent Book 3s implementations; memset(p, 0, N) will use the dcbz instruction
when N is sufficiently large and many of the newer server CPUs have cache lines
sizes of 128 bytes.
Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
OABI arm used a software interrupt(0xef9f0001) for breakpoints.
Since 2005 gdb has used the break instruction(0xe7f001f0) for EABI.
Apparently Steel Bank Common Lisp still uses the swi instruction.
This is the kernel implementation:
http://lxr.free-electrons.com/source/arch/arm/kernel/traps.c#L598
Signed-off-by: Hunter Laux <hunterlaux@gmail.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
As a "utility", it only supported ppc, and in a way that other
tcg backends provided directly in tcg-target.h. Removing this
disparity is easier now that the two ppc backends are merged.
Tested-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Instead of getting backup auxv data from the env pointer given to main,
read it from /proc/self/auxv. We can do this at any time, so we're not
tied to any ordering wrt a call to qemu_init_auxval from main.
Tested-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
From MIPS documentation (Volume III):
UserLocal Register (CP0 Register 4, Select 2)
Compliance Level: Recommended.
The UserLocal register is a read-write register that is not interpreted by
the hardware and conditionally readable via the RDHWR instruction.
This register only exists if the Config3-ULRI register field is set.
Privileged software may write this register with arbitrary information and
make it accessible to unprivileged software via register 29 (ULR) of the
RDHWR instruction. To do so, bit 29 of the HWREna register must be set to a
1 to enable unprivileged access to the register.
Signed-off-by: Petar Jovanovic <petar.jovanovic@imgtec.com>
Reviewed-by: Andreas Färber <afaerber@suse.de>
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
In user mode Linux, Qemu currently refuses to load ELF files that do not
contain section headers (ehdr->e_shentsize == 0). Since section headers are not
required in order to load an ELF file, simply removing the e_shentsize check in
elf_check_ehdr() allows ELF binaries with no section headers to be run properly
in user mode:
Signed-off-by: Craig Heffner <cheffner@tacnetsol.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
This fixes "Cannot open audit interface - aborting." when the
EAFNOSUPPORT errno differs between the target and host
architectures (e.g. mips target and x86_64 host).
Signed-off-by: Ed Swierk <eswierk@skyportsystems.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
If the guest's "long" type is smaller than the host's, then
our sched_getaffinity wrapper needs to round the buffer size
up to a multiple of the host sizeof(long). This means that when
we copy the data back from the host buffer to the guest's
buffer there might be more than we can fit. Rather than
overflowing the guest's buffer, handle this case by returning
EINVAL or ignoring the unused extra space, as appropriate.
Note that only guests using the syscall interface directly might
run into this bug -- the glibc wrappers around it will always
use a buffer whose size is a multiple of 8 regardless of guest
architecture.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
We were returning the incorrect uname string (with a hyphen, not
an underscore) for x86_64. Fix this by removing the x86_64 special
case, since the default "just use UNAME_MACHINE" behaviour suffices.
This leaves cpu_to_uname_machine() special cases for only those
architectures which need to vary the string based on runtime CPU
features.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
gcc-4.9 finds unused operand:
linux-user/syscall.c: In function ‘host_to_target_stat64’:
linux-user/qemu.h:301:19: error: right-hand operand of comma expression
has no effect [-Werror=unused-value]
((hptr), (x)), 0)
Just removing the rh operand is no good, it will error in later:
linux-user/main.c: In function ‘arm_kernel_cmpxchg64_helper’:
linux-user/qemu.h:330:15: error: void value not ignored as it ought to be
__ret = __put_user((x), __hptr); \
Thus, remove setting __ret from __get_user and __put_user, as and
set the right hand operand to (void)0 to make it clear that these
return never nothing.
This commit depends on the signal.c cleanup, to ensure bisectable
version history.
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Cc: Richard Henderson <rth@twiddle.net>
The last remaining check for return value of __get_user.
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Cc: Alexander Graf <agraf@suse.de>
Remove checks of __get_user and the err variable
used to control flow with it.
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
As __get_user and __put_user do not return errors, remove the
if checks from around them. This allows making the save/restore
functions void.
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Cc: Alexander Graf <agraf@suse.de>
Remove "if(__put_user" checks and their related error paths
for all architecture's setup_frame, setup_rt_frame and similar.
Remove the unlock_user_struct when the only way to end up there is
from failed lock_user_struct.
Remove err variable if there are no users for it in the function
anymore.
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Remove "if(__get_user" checks and their related error paths
for all architecture's do_sigreturn. Remove the unlock_user_struct
when the only way to end up there is from failed lock_user_struct.
v3: remove unneccesary sigsegv label as suggested by Peter
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Access is already checked in the lock_user_struct
call before.
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
A function never called from anywhere, obviously half-complete.
Remove function and if someone wants to complete this, please
check the old version out of git history.
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
make most implementations of restore_sigcontext void and
remove checking it's return value from functions calling
restore_sigcontext.
The exception is the X86 version of the function that is
too different from others to deal in this way, and arm
version, to keep possibility of erroring out from failed
valid_user_regs.
v3: keep arm valid_user_regs for filling in near future.
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Make all implementations of setup_sigcontext void and
remove checking it's return value from functions calling
setup_sigcontext.
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Since copy_siginfo_to_user always returns 0, make it void
and remove any checks for return value from calling functions.
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Remove the remaining check for __put_user return
value, and all the checks for err variable which
isn't set anywhere anymore.
No we can only end up in give_sigsegv due to failed
lock_user_struct - thus we remove the unlock_user_struct
to avoid unlocking a region never locked.
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Remove all the simple cases of reading the return value
of __get_user and __put_user.
We set err = 0 in sparc versions of do_sigreturn and
sparc64_set_context to avoid compile error, but else this patch is
just general removal of err |= __get_user ... idiom.
v2: remove err variable from target_rt_restore_ucontext
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
We tell the guest its page size via AUX vectors. The guest process then uses
this page size as information on which boundaries it can mmap() things.
However, if the host has a bigger page size granularity than the guest, it can
not fulfill these mmap() requests - which falls apart when MAP_FIXED is passed
to mmap.
So in that case, let the guest know that we're running on a bigger page size
granularity than the target would require.
This fixes running qemu-ppc (TARGET_PAGE_SIZE=4k) on a 64k page size ppc64 host
for me.
Signed-off-by: Alexander Graf <agraf@suse.de>
Reviewed-by: Richard Henderson <rth@twiddle.net>
The size and register information are encoded into the reserve_info field
of CPU state in the store conditional translation code. Specifically, the
size is shifted left by 5 bits (see target-ppc/translate.c gen_conditional_store).
The user-mode store conditional code erroneously extracts the size by ANDing
with a 4 bit mask; this breaks if size >= 16.
Eliminate the mask to make the extraction of size mirror its encoding.
Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
The existing code does a check to ensure that a .bss region is properly
mmap'd. When additional mmap is required, the (guest) pages are also
validated. However, this code has a bug: when host page size is larger
than target page size, it is possible for the .bss pages to already be
(host) mapped but the guest .bss pages may not be valid.
The check to mmap additional space is separated from the flagging of the
target (guest) pages, thus ensuring that both aspects are done properly.
Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This allows running PPC64 little-endian in user mode if target is configured
that way. In PPC64 LE user mode we set MSR.LE during initialization.
Signed-off-by: Doug Kwan <dougkwan@google.com>
Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Look at ELF header to determine ABI version on PPC64. This is required
for executing the first instruction correctly. Also print correct machine
name in uname() system call.
Signed-off-by: Doug Kwan <dougkwan@google.com>
Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Riku Voipio