The current implementation of watchpoints requires that they
have a power of 2 length which is not greater than TARGET_PAGE_SIZE
and that their address is a multiple of their length. Watchpoints
on ARM don't fit these restrictions, so change the implementation
so they can be relaxed.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Function pointers in the 64-bit ELFv2 PowerPC ABI are actual (internal)
entry point addresses. However, when invoking a function via a function
pointer, GPR 12 must also be set to this address so that the TOC may be
handled properly.
Add this support to the invocation of a signal handler.
Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Eliminate the stub for the do_setcontext() function for TARGET_PPC64. The
implementation re-uses the existing TARGET_PPC32 code with the only change
being the computation of the address of the register save area.
Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Properly dereference 64-bit PPC ELF V1 ABIT function pointers to signal handlers.
On this platform, function pointers are pointers to structures and the first 64
bits of such a structure contains the function's entry point. The second 64 bits
contains the TOC pointer, which must be placed into GPR 2.
Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Enable the 64-bit PowerPC signal handling code that was previously
disabled via #ifdefs. Specifically:
- Move the target_mcontext (register save area) structure and
append it to the 64-bit target_sigcontext structure. This
provides the space on the stack for saving and restoring
context.
- Define the target_rt_sigframe for 64-bit.
- Adjust the setup_frame and setup_rt_frame routines to properly
select the target_mcontext area and trampoline within the stack
frame; tthis is different for 32-bit and 64-bit implementations.
- Adjust the do_setcontext stub for 64-bit so that it compiles
without warnings.
The 64-bit signal handling code is still not functional after this
change; but the 32-bit code is. Subsequent changes will address
specific issues with the 64-bit code.
Signed-off-by: Tom Musta <tommusta@gmail.com>
[agraf: fix build on 32bit hosts, ppc64abi32]
Signed-off-by: Alexander Graf <agraf@suse.de>
Split the encoding of the PowerPC sigreturn trampoline from the saving of
register state onto the signal handler stack. This will make it easier
in subsequent patches to deal with variations in the stack frame layouts between
32 and 64 bit PowerPC.
Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
The code that sets the stack frame back pointer is incorrect for
the setup_rt_frame() code; qemu will abort (SIGSEGV) in some
environments. The setup_frame code was fixed in commit
beb526b121 but the setup_rt_frame
code was not.
Make the setup_rt_frame code consistent with the setup_frame
code.
Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Although not technically not required by POSIX, the writev system call will
typically write out its buffers individually. That is, if the first buffer
is written successfully, but the second buffer pointer is invalid, then
the first chuck will be written and its size is returned.
Signed-off-by: Tom Musta <tommusta@gmail.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
The argument to the mlockall system call is not necessarily the same on
all platforms and thus may require translation prior to passing to the
host.
For example, PowerPC 64 bit platforms define values for MCL_CURRENT
(0x2000) and MCL_FUTURE (0x4000) which are different from Intel platforms
(0x1 and 0x2, respectively)
Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
The clock_nanosleep syscall is unusual in that it returns positive
numbers in error handling situations, versus returning -1 and setting
errno, or returning a negative errno value. On POWER, the kernel will
set the SO bit of CR0 to indicate failure in a syscall. QEMU has
generic handling to do this for syscalls with standard return values.
Add special case code for clock_nanosleep to handle CR0 properly.
Signed-off-by: Tom Musta <tommusta@gmail.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
The ELF V2 ABI for PPC64 defines MINSIGSTKSZ as 4096 bytes whereas it was
2048 previously.
Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
The get_ppc64_abi is used to determine the ELF ABI (i.e. V1 or V2). This
routine is currently implemented in the linux-user/elfload.c file but
is useful in other scenarios. Move the routine to a more generally
available location (linux-user/ppc/target_cpu.h).
Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
The sched_getparam, sched_setparam and sched_setscheduler system
calls take a pointer argument to a sched_param structure. When
this pointer is null, errno should be set to EINVAL.
Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
The msgsnd system call takes an argument that describes the message
size (msgsz) and is of type size_t. The system call should set
errno to EINVAL in the event that a negative message size is passed.
Signed-off-by: Tom Musta <tommusta@gmail.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
The mq_open system call takes an optional struct mq_attr pointer
argument in the fourth position. This pointer is used when O_CREAT
is specified in the flags (second) argument. It may be NULL, in
which case the queue is created with implementation defined attributes.
Change the code to properly handle the case when NULL is passed in the
arg4 position.
Signed-off-by: Tom Musta <tommusta@gmail.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
For those target ABIs that use the ipc system call (e.g. POWER),
the third argument is used in the shmat path as a pointer. It
therefore must be declared as an abi_long (versus int) so that
the address bits are not lost in truncation. In fact, all arguments
to do_ipc should be declared as abit_long.
In fact, it makes more sense for all of the arguments to be declaried
as abi_long (except call).
Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
The semun union used in the semctl system call contains both an int (val) and
pointers. In cross-endian situations on 64 bit targets, the value passed to
semctl is an 8 byte (abi_long) value and thus does not have the 4-byte val
field in the correct location. In order to rectify this, the other half
of the union must be accessed. This is achieved in code by performing
a byte swap on the entire 8 byte union, followed by a 4-byte swap of the
first half.
Also, eliminate an extraneous (dead) line of code that sets target_su.val in
the IPC_SET/IPC_GET case.
Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
When the ipc system call is used to wrap a semctl system call,
the ptr argument to ipc needs to be dereferenced prior to passing
it to the semctl handler. This is because the fourth argument to
semctl is a union and not a pointer to a union.
Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
The 64 bit PowerPC platforms eliminate the _unused1 and _unused2
elements of the semid_ds structure from <sys/sem.h>. So eliminate
these from the target_semid_ds structure.
Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Add support for the setns and unshare syscalls, trivially passed through to
the host. Based on patches by Paul Burton, added configure check.
Signed-off-by: Paul Burton <paul@archlinuxmips.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Add support for the ioprio_get & ioprio_set syscalls, allowing their
use by target programs.
Signed-off-by: Paul Burton <paul@archlinuxmips.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Adds support for the timerfd_create, timerfd_gettime & timerfd_settime
syscalls, allowing use of timerfds by target programs.
v2: By Riku - added configure check for timerfd and ifdefs
for benefit of old distributions like RHEL5.
Signed-off-by: Paul Burton <paul@archlinuxmips.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Peter Maydell
Tom MustaandAlexander Graf
zhanghailiangandMichael Tokarev
Paul BurtonandRiku Voipio