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If QEMU forks after the CPU threads have been created, qemu_mutex_lock_iothread
will not be able to do qemu_cpu_kick_thread. There is no solution other than
assuming that forks after the CPU threads have been created will end up in an
exec. Forks before the CPU threads have been created (such as -daemonize)
have to call rcu_after_fork manually.
Notably, the oxygen theme for GTK+ forks and shows a "No such process" error
without this patch.
This patch can be reverted once the iothread loses the "kick the TCG thread"
magic.
User-mode emulation does not use the iothread, so it can also call
rcu_after_fork.
Reported by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Tested by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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New threads always point at the same env which is incorrect and usually
leads to a crash.
Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
Reviewed-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
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The second and fourth argument are in/out parameters, store them back
after the syscall. Also, the fourth argument was mishandled, and EFAULT
handling was missing.
Signed-off-by: Andreas Schwab <schwab@suse.de>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
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arm_kernel_cmpxchg64_helper()
start/end_exclusive() need be pairs, except the start_exclusive() in
stop_all_tasks() which is only used by force_sig(), which will be abort.
So at present, start_exclusive() in stop_all_task() need not be paired.
queue_signal() may call force_sig(), or return after kill pid (or queue
signal). If could return from queue_signal(), stop_all_task() would not
be called in time, the next end_exclusive() would be issue.
So in arm_kernel_cmpxchg64_helper() for ARM, need remove end_exclusive()
after queue_signal(). The related commit: "97cc756 linux-user: Implement
new ARM 64 bit cmpxchg kernel helper".
Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
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When support was added for TrustZone to ARM CPU emulation, we failed
to correctly update the support for the linux-user implementation of
the get/set_tls syscalls. This meant that accesses to the TPIDRURO
register via the syscalls were always using the non-secure copy of
the register even if native MRC/MCR accesses were using the secure
register. This inconsistency caused most binaries to segfault on startup
if the CPU type was explicitly set to one of the TZ-enabled ones like
cortex-a15. (The default "any" CPU doesn't have TZ enabled and so is
not affected.)
Use access_secure_reg() to determine whether we should be using
the secure or the nonsecure copy of TPIDRURO when emulating these
syscalls.
Signed-off-by: Mikhail Ilyin <m.ilin@samsung.com>
Message-id: 1426505198-2411-1-git-send-email-m.ilin@samsung.com
[PMM: rewrote commit message to more clearly explain the issue
and its consequences.]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Instead of making cpu_init() return CPUArchState, return CPUState.
Changes were made using the Coccinelle semantic patch below.
@@
typedef CPUState;
identifier e;
expression args;
type CPUArchState;
@@
- e =
+ cpu =
cpu_init(args);
- if (!e) {
+ if (!cpu) {
...
}
- cpu = ENV_GET_CPU(env);
+ e = cpu->env_ptr;
@@
identifier new_env, new_cpu, env, cpu;
type CPUArchState;
expression args;
@@
-{
- CPUState *cpu = ENV_GET_CPU(env);
- CPUArchState *new_env = cpu_init(args);
- CPUState *new_cpu = ENV_GET_CPU(new_env);
+{
+ CPUState *cpu = ENV_GET_CPU(env);
+ CPUState *new_cpu = cpu_init(args);
+ CPUArchState *new_env = new_cpu->env_ptr;
...
}
@@
identifier c, cpu_init_func, cpu_model;
type StateType, CPUType;
@@
-static inline StateType* cpu_init(const char *cpu_model)
-{
- CPUType *c = cpu_init_func(cpu_model);
(
- if (c == NULL) {
- return NULL;
- }
- return &c->env;
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- if (c) {
- return &c->env;
- }
- return NULL;
)
-}
+#define cpu_init(cpu_model) CPU(cpu_init_func(cpu_model))
@@
identifier cpu_init_func;
identifier model;
@@
-#define cpu_init(model) (&cpu_init_func(model)->env)
+#define cpu_init(model) CPU(cpu_init_func(model))
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Cc: Blue Swirl <blauwirbel@gmail.com>
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Cc: Riku Voipio <riku.voipio@iki.fi>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: "Edgar E. Iglesias" <edgar.iglesias@gmail.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Michael Walle <michael@walle.cc>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Cc: Leon Alrae <leon.alrae@imgtec.com>
Cc: Anthony Green <green@moxielogic.com>
Cc: Jia Liu <proljc@gmail.com>
Cc: Alexander Graf <agraf@suse.de>
Cc: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Cc: Max Filippov <jcmvbkbc@gmail.com>
[AF: Fixed up cpu_copy() manually]
Signed-off-by: Andreas Färber <afaerber@suse.de>
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'remotes/ehabkost/tags/x86-pull-request' into staging"
This reverts commit b8a173b25c887a606681fc35a46702c164d5b2d0, reversing
changes made to 5de090464f1ec5360c4f30faa01d8a9f8826cd58.
(I applied this pull request when I should not have done so, and
am now immediately reverting it.)
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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This was the only caller of cpu_init() that was not checking for NULL
yet.
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
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Simple "hello world" MIPS N32 userland program crashes with segfault due to
incorrectly defined stat structure in QEMU.
Correct "target_stat" definition to match kernel's "stat64" as in MIPS N32
there are only plain "stat" syscalls using 64-bit structure.
Reported-by: Daniel Sanders <daniel.sanders@imgtec.com>
Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
Tested-by: Daniel Sanders <daniel.sanders@imgtec.com>
Reviewed-by: James Hogan <james.hogan@imgtec.com>
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Fix TARGET_SI_PAD_SIZE calculation to match the way the kernel does it.
Use different TARGET_SI_PREAMBLE_SIZE for 32-bit and 64-bit targets.
Signed-off-by: Maxim Ostapenko <m.ostapenko@partner.samsung.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
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to failure return in default case
In abi_long do_ioctl_dm(), after lock_user() call, the code does
not call unlock_user() before going to failure return in default case.
Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
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In main.c, all SIG* should be TARGET_SIG*, since the relevant functions
(queue_signal() and gdb_handlesig()) expect TARGET_SIG*.
The corresponding vi command is "1,$ s/\<SIG/TARGET_SIG/g".
Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
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of target_vec[i].iov_base
It is only a typo issue, need use tswapal(target_vec[i].iov_len) for the
len.
Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
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When failure occurs during locking of vec[i], we also need to unlock all
already locked vec[i] in failure processing code block before return.
Code in unlock_user() checks vec[i].iov_base for NULL, so there's no
need not check it .
If error is EFAULT when "i == 0", vec[i].iov_base is NULL, we can just
skip it, so can still use "while (--i >= 0)" loop condition.
Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
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When passing ancillary data through a unix socket, handle
credentials properly instead of doing a simple copy and
issuing a warning.
Signed-off-by: Alex Suykov <alex.suykov@gmail.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
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The m68k signal frame setup code which writes the signal return
trampoline code to the stack was assuming that a 'long' was 32 bits;
on 64 bit systems this meant we would end up writing the 32 bit
(2 insn) trampoline sequence to retaddr+4,retaddr+6 instead of
the intended retaddr+0,retaddr+2, resulting in a guest crash when
it tried to execute the invalid zero-bytes at retaddr+0.
Fix by using uint32_t instead; also use uint16_t rather than short
for consistency. This fixes bug LP:1404690.
Reported-by: Michel Boaventura
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
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Without this fix, qemu segfaults when emulating the sigaltstack syscall,
because it incorrectly treats the ss_flags field as 64 bits rather than 32
bits.
Signed-off-by: Ed Swierk <eswierk@skyportsystems.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
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linux-user passes the cmd argument of the ioctl syscall as a signed long,
but compares it to an unsigned int when iterating through the ioctl_entries
list. When the cmd is a large value like 0x80047476 (TARGET_TIOCSWINSZ on
mips64) it gets sign-extended to 0xffffffff80047476, causing the comparison
to fail and resulting in lots of spurious "Unsupported ioctl" errors.
Changing the target_cmd field in the ioctl_entries list to a signed int
causes those values to be sign-extended as well during the comparison.
Signed-off-by: Ed Swierk <eswierk@skyportsystems.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
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The resource argument is translated from host to target for
[gs]etprlimit but not for prlimit64. Fix this.
Signed-off-by: Felix Janda <felix.janda@posteo.de>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
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The function copy_siginfo_to_user() just calls tswap_siginfo(), so
call the latter function directly and delete the wrapper function.
The wrapper is actually misleading since it implies that the
semantics are like the kernel function with the same name which
copies the data to a guest user-space address. In fact tswap_siginfo()
just does data-structure conversion between two structures whose
addresses are host addresses (the copy to userspace is handled
in QEMU by the lock_user/unlock_user calls).
This also fixes clang complaints about the wrapper being unused
in some configs.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
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The function end_exclusive() isn't used on all targets; mark it as
such to avoid a clang warning.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
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The start_exclusive() infrastructure is used on all target
architectures, even if only to do the "stop all CPUs before
dumping core" in force_sig(), so be consistent and call
cpu_exec_start/end in the main loop of every target.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
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The aCC array in fpopcode.c is completely unused in QEMU; delete
it (silencing a clang warning).
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
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For historical reasons, the define for the shmat() syscall on Alpha is
NR_osf_shmat; however it has the same semantics as this syscall does
on all other architectures, so define TARGET_NR_shmat as well so that
QEMU's code for the syscall is enabled.
This patch brings our behaviour on the LTP shmat tests into line
with that for ARM (still not a perfect pass rate but not "this syscall
is completely broken" as we had before).
(Problem detected via a clang warning that the do_shmat() function
was unused on Alpha.)
Cc: Richard Henderson <rth@twiddle.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
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Remove the function current_exec_domain_sig(), which always returns
its argument. This was intended as a stub for supporting the kernel's
exec_domain handling, but:
* we don't have any of the other code for execution domains
* in the kernel this handling is architecture-specific, not generic
* we only call this function in the x86, ppc and sh4 signal code paths,
and the PPC one is wrong anyway because the PPC kernel doesn't
have this signal-remapping code
So it's best to simply delete the function; any future attempt to
implement exec domains will be better served by adding the correct
code from scratch based on the kernel sources at that time.
This change also fixes some clang warnings about the function being
defined but not used for some target architectures.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
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In the m68k cpu_loop() use get_user_u16 to read the immediate for
the simcall rahter than lduw, to bring it into line with how other
archs do it and to remove another user of the ldl family of functions.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-id: 1421334118-3287-8-git-send-email-peter.maydell@linaro.org
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Use the cpu_ld*_data and cpu_st*_data family of functions to access
guest memory in vm86.c rather than the very short-named ldl/stl functions.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-id: 1421334118-3287-7-git-send-email-peter.maydell@linaro.org
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The _raw accessor functions are an implementation detail that has
leaked out to some callsites. Use get_user_u64() instead of ldq_raw().
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-id: 1421334118-3287-5-git-send-email-peter.maydell@linaro.org
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The TARGET_HAS_ICE #define is intended to indicate whether a target-*
guest CPU implementation supports the breakpoint handling. However,
all our guest CPUs have that support (the only two which do not
define TARGET_HAS_ICE are unicore32 and openrisc, and in both those
cases the bp support is present and the lack of the #define is just
a bug). So remove the #define entirely: all new guest CPU support
should include breakpoint handling as part of the basic implementation.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Message-id: 1420484960-32365-1-git-send-email-peter.maydell@linaro.org
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Replace the 20Kc original MIPS64 ISA processor used for 64-bit user
emulation with the 5KEf processor that implements the MIPS64r2 ISA,
complementing the choice of the 24Kf processor for 32-bit emulation.
Signed-off-by: Maciej W. Rozycki <macro@codesourcery.com>
Reviewed-by: Leon Alrae <leon.alrae@imgtec.com>
Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
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When EL3 is running in AArch32 (or ARMv7 with Security Extensions)
FCSEIDR, CONTEXTIDR, TPIDRURW, TPIDRURO and TPIDRPRW have a secure
and a non-secure instance.
Signed-off-by: Fabian Aggeler <aggelerf@ethz.ch>
Signed-off-by: Greg Bellows <greg.bellows@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1416242878-876-25-git-send-email-greg.bellows@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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When creating a timer handle, we give the timer id a special magic offset
of 0xcafe0000. However, we never mask that offset out of the timer id before
we start using it to dereference our timer array. So we always end up aborting
timer operations because the timer id is out of bounds.
This was not an issue before my patch e52a99f756e ("linux-user: Simplify
timerid checks on g_posix_timers range") because before we would blindly mask
anything above the first 16 bits.
This patch simplifies the code around timer id creation by introducing a proper
target_timer_id typedef that is s32, just like Linux has it. It also changes the
magic offset to a value that makes all timer ids be positive.
Reported-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Tom Musta <tommusta@gmail.com>
Tested-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
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When computing the upper address of a program segment, do not subtract the
offset from the virtual address; instead compute the sum of the virtual address
and the memory size.
Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
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The first program header does not necessarily start at offset 0. This change
corresponds to what the Linux kernel does in load_elf_binary().
Signed-off-by: Jonas Maebe <jonas.maebe@elis.ugent.be>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
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On AArch64 the si_addr field of siginfo_t is truncated to 32 bits
because the fault address passes through an uint32_t variable.
Follow Peters suggestion and drop the uint32_t variable
since its only used once in the Aarch64 loop.
Reported-by: Amanieu d'Antras <amanieu@gmail.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
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This patch introduces the -seed command line option and the
QEMU_RAND_SEED environment variable for setting the random seed, which
is used for the AT_RANDOM ELF aux entry.
Signed-off-by: Magnus Reftel <reftel@spotify.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
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The initial base address is miscalculated in walk_memory_regions().
It has to be shifted TARGET_PAGE_BITS more. Holder variables are
extended to target_ulong size otherwise they don't fit for MIPS N32
(a 32-bit ABI with a 64-bit address space) and qemu won't compile.
The issue led to incorrect debug output of memory maps and a
mis-formed coredumped file.
Signed-off-by: Mikhail Ilyin <m.ilin@samsung.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
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Without this, builds on older systems fail with:
qemu/linux-user/syscall.c:61:25: warning: sys/timerfd.h: No such file or directory
v2: fix the usual case where CONFIG_TIMERFD is enabled..
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
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We check whether the passed in timer id is negative on all calls
that involve g_posix_timers.
However, these checks are bogus. First off we limit the timer_id to
16 bits which is not what Linux does. Then we check whether it's negative
which it can't be because we masked it.
We can safely remove the masking. For the negativity check we can just
treat the timerid as unsigned and only check for upper boundaries.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
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The blkpg ioctl can take different payloads depending on the opcode in
its payload structure. Create a new special ioctl handler that can only
deal with partition style ones for now.
This patch fixes running parted for me.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
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We have support for the epoll_pwait syscall, but it wasn't enabled for
ARM guests because we hadn't defined the syscall number; correct this
deficiency.
Reported-by: Dave Flogeras <dflogeras2@gmail.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
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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>
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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>
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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>
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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>
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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>
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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>
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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
beb526b12134a6b6744125deec5a7fe24a8f92e3 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>
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Handle variable "fd_orig" going out of scope leaks the handle.
Signed-off-by: zhanghailiang <zhang.zhanghailiang@huawei.com>
Reviewed-by: Gonglei <arei.gonglei@huawei.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
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Signed-off-by: zhanghailiang <zhang.zhanghailiang@huawei.com>
Acked-by: Riku Voipio <riku.voipio@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
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