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2010-12-07ARM: fix ldrexd/strexdPeter Maydell
Correct ldrexd and strexd code to always read and write the high word of the 64-bit value from addr+4. Also make ldrexd and strexd agree that for a 64 bit value the address in env->exclusive_addr is that of the low word. This fixes the issues reported in https://bugs.launchpad.net/qemu/+bug/670883 Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Nathan Froyd <froydnj@codesourcery.com>
2010-12-03linux-user: fix mips and ppc to use UID16Martin Mohring
Signed-off-by: Martin Mohring <martin.mohring@5edatasoft.com> Signed-off-by: Jan-Simon Möller <jsmoeller@linuxfoundation.org> Signed-off-by: Riku Voipio <riku.voipio@nokia.com>
2010-12-03linux-user: fix compiler error on nptlRiku Voipio
Some compilers detect that new_stack isnt used after dd75d784 Signed-off-by: Riku Voipio <riku.voipio@nokia.com>
2010-12-03ARM: linux-user: Restore iWMMXT state from ucontext on sigreturnPeter Maydell
Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Riku Voipio <riku.voipio@nokia.com>
2010-12-03ARM: linux-user: Expose iWMMXT registers to signal handlersPeter Maydell
Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Riku Voipio <riku.voipio@nokia.com>
2010-12-03ARM: linux-user: Restore VFP state from ucontext on sigreturnPeter Maydell
Restore the VFP registers from the ucontext on return from a signal handler in linux-user mode. This means that signal handlers cannot accidentally corrupt the interrupted code's VFP state, and allows them to deliberately modify the state via the ucontext structure. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Riku Voipio <riku.voipio@nokia.com>
2010-12-03ARM: linux-user: Expose VFP registers to signal handlersPeter Maydell
For ARM linux-user mode signal handlers, fill in the ucontext with VFP register contents in the same way that the kernel does. We only do this for v2 format sigframe (2.6.12 and above); this is actually bug-for-bug compatible with the older kernels, which don't save and restore VFP registers either. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Riku Voipio <riku.voipio@nokia.com>
2010-12-03ARM: linux-user: Correct size of padding in target_ucontext_v2Peter Maydell
The padding in the target_ucontext_v2 is defined by the size of the target's sigset_t type, not the host's. (This bug only causes problems when we start using the uc_regspace[] array to expose VFP registers to userspace signal handlers.) Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Riku Voipio <riku.voipio@nokia.com>
2010-12-03linux-user: Translate getsockopt level optionJamie Lentin
n setsockopt, the socket level options are translated to the hosts' architecture before the real syscall is called, e.g. TARGET_SO_TYPE -> SO_TYPE. This patch does the same with getsockopt. Tested on a x86 host emulating MIPS. Without it:- $ grep getsockopt host.strace 31311 getsockopt(3, SOL_SOCKET, 0x1007 /* SO_??? */, 0xbff17208, 0xbff17204) = -1 ENOPROTOOPT (Protocol not available) With:- $ grep getsockopt host.strace 25706 getsockopt(3, SOL_SOCKET, SO_ERROR, [0], [4]) = 0 Whitespace cleanup: Riku Voipio Signed-off-by: Jamie Lentin <jm@lentin.co.uk> Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
2010-12-03linux-user: remove unnecessary local from __get_user(), __put_user()Peter Maydell
Remove an unnecessary local variable from the __get_user() and __put_user() macros. This avoids confusing compilation failures if the name of the local variable ('size') happens to be the same as the variable the macro user is trying to read/write. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Riku Voipio <riku.voipio@nokia.com>
2010-12-03linux-user: fix memory leaks with NPTL emulationNathan Froyd
Running programs that create large numbers of threads, such as this snippet from libstdc++'s pthread7-rope.cc: const int max_thread_count = 4; const int max_loop_count = 10000; ... for (int j = 0; j < max_loop_count; j++) { ... for (int i = 0; i < max_thread_count; i++) pthread_create (&tid[i], NULL, thread_main, 0); for (int i = 0; i < max_thread_count; i++) pthread_join (tid[i], NULL); } in user-mode emulation will quickly run out of memory. This is caused by a failure to free memory in do_syscall prior to thread exit: /* TODO: Free CPU state. */ pthread_exit(NULL); The first step in fixing this is to make all TaskStates used by QEMU dynamically allocated. The TaskState used by the initial thread was not, as it was allocated on main's stack. So fix that, free the cpu_env, free the TaskState, and we're home free, right? Not exactly. When we create a thread, we do: ts = qemu_mallocz(sizeof(TaskState) + NEW_STACK_SIZE); ... new_stack = ts->stack; ... ret = pthread_attr_setstack(&attr, new_stack, NEW_STACK_SIZE); If we blindly free the TaskState, then, we yank the current (host) thread's stack out from underneath it while it still has things to do, like calling pthread_exit. That causes problems, as you might expect. The solution adopted here is to let the C library allocate the thread's stack (so the C library can properly clean it up at pthread_exit) and provide a hint that we want NEW_STACK_SIZE bytes of stack. With those two changes, we're done, right? Well, almost. You see, we're creating all these host threads and their parent threads never bother to check that their children are finished. There's no good place for the parent threads to do so. Therefore, we need to create the threads in a detached state so the parent thread doesn't have to call pthread_join on the child to release the child's resources; the child does so automatically. With those three major changes, we can comfortably run programs like the above without exhausting memory. We do need to delete 'stack' from the TaskState structure. Signed-off-by: Nathan Froyd <froydnj@codesourcery.com> Signed-off-by: Riku Voipio <riku.voipio@nokia.com>
2010-12-03linux-user: mmap_reserve() not controlled by RESERVED_VAamateur
mmap_reserve() should be called only when RESERVED_VA is enabled. Otherwise, unmaped virtual address space will never be reusable. This bug will exhaust virtual address space in extreme conditions. Signed-off-by: Riku Voipio <riku.voipio@nokia.com>
2010-11-23microblaze: target-ify target_ucontextRichard Henderson
Rename the members of target_ucontext so that they don't conflict with possible host macros for ucontext members. This has already been done for the other targets. Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Edgar E. Iglesias <edgar@axis.com>
2010-10-05linux-user: Fix typo m86k -> m68kStefan Weil
Replace m86k_sim_stat by m68k_sim_stat. Cc: Riku Voipio <riku.voipio@iki.fi> Signed-off-by: Stefan Weil <weil@mail.berlios.de>
2010-10-05Add new user mode option -ignore-environmentStefan Weil
An empty environment is sometimes useful in user mode. The new option provides it for linux-user and bsd-user (darwin-user still has no environment related options). The patch also adds the documentation for other environment related options. Signed-off-by: Stefan Weil <weil@mail.berlios.de>
2010-10-03Replace most gcc format attributes by macro GCC_FMT_ATTR (format checking)Stefan Weil
Since version 4.4.x, gcc supports additional format attributes. __attribute__ ((format (gnu_printf, 1, 2))) should be used instead of __attribute__ ((format (printf, 1, 2)) because QEMU always uses standard format strings (even with mingw32). The patch replaces format attribute printf / __printf__ by macro GCC_FMT_ATTR which uses gnu_printf if supported. It also removes an #ifdef __GNUC__ (not needed any longer). Cc: Blue Swirl <blauwirbel@gmail.com> Signed-off-by: Stefan Weil <weil@mail.berlios.de> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2010-09-18linux-user: improve flatload error checkingBlue Swirl
Because of the use of unsigned type, possible errors during load were ignored. Fix by using a signed type. This also avoids a warning with GCC flag -Wtype-limits. Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2010-09-18linux-user: fix types in a comparisonBlue Swirl
-1ul is unsigned long, which does not necessarily match abi_ulong type. Fix by using abi_long instead. This also avoids a warning with GCC flag -Wtype-limits. Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2010-09-18linux-user: fix socklen_t comparisonsBlue Swirl
On many systems, socklen_t is defined as unsigned. This means that checks for negative values are not meaningful. Fix by explicitly casting to a signed integer. This also avoids some warnings with GCC flag -Wtype-limits. Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2010-09-09microblaze: User-mode emulation of hw-excp signalsEdgar E. Iglesias
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@petalogix.com>
2010-08-09microblaze: Fix the target version of stat64 structEdgar E. Iglesias
MicroBlaze needs TARGET_STAT64_HAS_BROKEN_ST_INO. Signed-off-by: Edgar E. Iglesias <edgar.iglesias@petalogix.com>
2010-07-30linux-user: fix build on hosts not using guest baseAurelien Jarno
Commit 68a1c816868b3e35a1da698af412b29e61b1948a broke qemu on hosts not using guest base. It uses reserved_va unconditionally in mmap.c. To avoid to many #ifdef #endif blocks, define RESERVED_VA as either reserved_va or 0ul, and use it instead of reserved_va, similarly to what has been done with guest_base/GUEST_BASE.
2010-07-29linux-user: Protect against allocation failure in load_symbols.Richard Henderson
Cc: malc <av1474@comtv.ru> Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: malc <av1474@comtv.ru>
2010-07-29linux-user: Re-use load_elf_image for the main binary.Richard Henderson
This requires moving the PT_INTERP extraction and GUEST_BASE handling into load_elf_image. Key this off a non-null pointer argument to receive the interpreter name. Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
2010-07-29linux-user: Extract load_elf_image from load_elf_interp.Richard Henderson
Moving toward a single copy of the elf binary loading code. Fill in the details of the loaded image into a struct image_info. Adjust create_elf_tables to read from such structures instead of from a collection of passed arguments. Don't return error values from load_elf_interp; always exit(-1) with a message to stderr. Collect elf_interpreter handling in load_elf_binary to a common spot. Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
2010-07-29linux-user: Remove partial support for a.out interpreters.Richard Henderson
At the bottom of the a.out support was the unimplemented load_aout_interp function. There were other portions of the support that didn't look right; when I went to look in the Linux kernel for clarification, I found that the support for such interpreters has been removed from binfmt_elf. There doesn't seem to be any reason to keep this broken support in qemu. Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
2010-07-29linux-user: Put the stack guard page at the top.Richard Henderson
There are no supported stack-grows-up targets. We were putting the guard page at the highest address, i.e. the bottom of the stack. Use the maximum of host and guest page size for the guard size. Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
2010-07-29linux-user: Improve consistency checking in elf headers.Richard Henderson
Validate more fields of the elf header. Extract those checks into two common functions to be used in both load_elf_interp and load_elf_binary. Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
2010-07-29linux-user: Load symbols from the interpreter.Richard Henderson
First, adjust load_symbols to accept a load_bias parameter. At the same time, read the entire section header table in one go, use pread instead f lseek+read for the symbol and string tables, and properly free allocated structures on error exit paths. Second, adjust load_elf_interp to compute load_bias. This requires finding out the built-in load addresses. Which allows us to honor a pre-linked interpreter image when possible, and eliminate the hard-coded INTERP_MAP_SIZE value. Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
2010-07-29linux-user: Clean up byte-swapping in elfload.c.Richard Henderson
Remove ifdefs from code by defining empty inline functions when byte swapping isn't needed. Push loops over swapping arrays of structures into the swapping functions. Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
2010-07-29linux-user: Define ELF_DATA generically.Richard Henderson
The only consideration on this value is the target endianness. The existing defines were incorrect for alpha and sh4eb. Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
2010-07-29linux-user: Reduce lseek+reads while loading elf files.Richard Henderson
Define BPRM_BUF_SIZE to 1k and read that amount initially. If the data we want from the binary is in this buffer, use it instead of reading from the file again. Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
2010-07-29linux-user: Reindent elfload.c.Richard Henderson
Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
2010-07-29Add more DT_* and AT_* constants to qemu's copy of elf.h.Richard Henderson
Moving some PPC AT_* constants from elfload.c at the same time. Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
2010-07-29linux-user: Handle filesz < memsz for any PT_LOAD segment.Richard Henderson
I caught padzero not properly initializing the .bss segment on a statically linked Alpha program. Rather than a minimal patch, replace the gross code with a single mmap+memset. Share more code between load_elf_interp and load_elf_binary. Legally, an ELF program need not have just a single .bss; and PT_LOAD segment can have memsz > filesz. Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
2010-07-23microblaze: Pass a ucontext * as 3rd sighandler argEdgar E. Iglesias
There is disagreement between microblaze glibc and the kernel to what the third arg of signal handlers should point to. Change QEMU linux-user to match the kernel port. glibc patches are pending. Signed-off-by: Edgar E. Iglesias <edgar.iglesias@petalogix.com>
2010-07-22linux-user: display cpu list.Laurent Vivier
As it is done for qemu-system with "-cpu ?", when cpu_list_id() is missing for a target, call cpu_list() instead. Signed-off-by: Laurent Vivier <laurent@vivier.eu> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2010-07-15microblaze: Correct signal frame setup.Edgar E. Iglesias
Pass the context in r7. Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
2010-06-16Usermode exec-stack fixPaul Brook
When loading a shared library that requires an executable stack, glibc uses the mprotext PROT_GROWSDOWN flag to achieve this. We don't support PROT_GROWSDOWN. Add a special case to handle changing the stack permissions in this way. Signed-off-by: Paul Brook <paul@codesourcery.com>
2010-06-16Strace mprotect flags.Paul Brook
Teach strace code about linux specific mprotect flags. Signed-off-by: Paul Brook <paul@codesourcery.com>
2010-06-11s390x: Avoid _llseek.Richard Henderson
There's no _llseek on s390x either. Replace the existing test for __x86_64__ with a functional test for __NR_llseek. Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2010-06-10rename CONFIG_QEMU_PREFIXPaolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2010-06-09linux-user: honor low bit of entry PC for MIPSNathan Froyd
Signed-off-by: Nathan Froyd <froydnj@codesourcery.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2010-05-29Pre-allocate guest address spacePaul Brook
Allow pre-allocation of the guest virtual address space in usermode emulation. Signed-off-by: Paul Brook <paul@codesourcery.com>
2010-05-28alpha-linux-user: Fill in SI_CODE for SIGSEGV.Richard Henderson
Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2010-05-28linux-user: Use qemu-malloc.c.Richard Henderson
Since we're no longer setting PAGE_RESERVED, there's no need to implement qemu_malloc via mmap. Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2010-05-28linux-user: Fix compilation with DEBUG definedRiccardo Magliocchetti
Signed-off-by: Riccardo Magliocchetti <riccardo.magliocchetti@gmail.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2010-05-21linux-user: do not warn for missing pselect6Riku Voipio
Libc will fallback gracefully if pselect6 is not available. Thus put pselect6 to nowarn until the atomicity issues of the original pselect6 patch are dealt with. Signed-off-by: Riku Voipio <riku.voipio@nokia.com> Cc: Michael Casadevall <mcasadevall@ubuntu.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2010-05-21tcg: Initialize the prologue after GUEST_BASE is fixed.Richard Henderson
This will allow backends to make intelligent choices about how to implement GUEST_BASE. Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2010-05-21alpha-linux-user: Fix sigprocmask.Richard Henderson
Alpha passes oldset by value in a register, and returns the newset as the return value; as compared to the standard implementation in which both are passed by reference. This requires being able to distinguish negative return values that are not errors. Do this in the same way as the Alpha Linux kernel, by storing a zero in V0 in the implementation of the syscall. At the same time, fix a think-o in the regular sigprocmask path in which we passed the target, rather than the host, HOW value. Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
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