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2014-06-29linux-user: support the KDSIGACCEPT ioctlPaul Burton3-0/+9
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>
2014-06-29linux-user: allow NULL tv argument for settimeofdayPaul Burton1-4/+8
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>
2014-06-29linux-user: respect timezone for settimeofdayPaul Burton2-1/+33
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>
2014-06-29linux-user: fix struct target_epoll_event layout for MIPSPaul Burton1-1/+1
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>
2014-06-29linux-user: support strace of epoll_create1Paul Burton1-0/+3
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>
2014-06-29linux-user: allow NULL arguments to mountPaul Burton1-22/+53
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>
2014-06-29linux-user: support SO_PASSSEC setsockopt optionPaul Burton2-0/+8
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>
2014-06-29linux-user: support SO_{SND, RCV}BUFFORCE setsockopt optionsPaul Burton1-0/+6
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>
2014-06-29linux-user: support SO_ACCEPTCONN getsockopt optionPaul Burton1-0/+3
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>
2014-06-29linux-user: translate the result of getsockopt SO_TYPEPaul Burton1-0/+34
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>
2014-06-29linux-user: added fake open() for /proc/self/cmdlineWim Vander Schelden1-0/+46
Signed-off-by: Wim Vander Schelden <wim@fixnum.org> Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
2014-06-29Add support for MAP_NORESERVE mmap flag.Christophe Lyon1-0/+2
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>
2014-06-24Add support for the arm breakpoint syscallHunter Laux2-0/+5
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>
2014-06-23tcg-ppc: Merge cache-utils into the backendRichard Henderson1-3/+0
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>
2014-06-23qemu/osdep: Remove the need for qemu_init_auxvalRichard Henderson1-1/+0
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>
2014-06-18target-mips: implement UserLocal RegisterPetar Jovanovic2-2/+2
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>
2014-06-17User mode support for Linux ELF files with no section headerCraig Heffner1-1/+0
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>
2014-06-17linux-user: Return correct errno for unsupported netlink socketEd Swierk1-1/+1
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>
2014-06-17linux-user: Don't overrun guest buffer in sched_getaffinityPeter Maydell1-0/+16
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>
2014-06-17linux-user/uname: Return correct uname string for x86_64Peter Maydell1-3/+1
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>
2014-06-17linux-user: fix gcc-4.9 compiler error on __{get,put]}_userRiku Voipio1-6/+6
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>
2014-06-17signal/ppc/do_setcontext remove __get_user return checkRiku Voipio1-2/+1
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>
2014-06-17signal/sparc64_set_context: remove __get_user checksRiku Voipio1-9/+3
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>
2014-06-17signal/ppc/{save,restore}_user_regs remove __put/get error checksRiku Voipio1-85/+41
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>
2014-06-17signal/all/setup_frame remove __put_user checksRiku Voipio1-72/+25
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>
2014-06-17signal/all/do_sigreturn - remove __get_user checksRiku Voipio1-41/+18
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>
2014-06-17signal/all/do_sigaltstack remove __get_user value checkRiku Voipio1-4/+5
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>
2014-06-17signal/sparc/restore_fpu_state: removeRiku Voipio1-37/+0
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>
2014-06-17signal/all: remove return value from restore_sigcontextRiku Voipio1-31/+12
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>
2014-06-17signal/all: remove return value from setup_sigcontextRiku Voipio1-44/+21
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>
2014-06-17signal/all: remove return value from copy_siginfo_to_userRiku Voipio1-19/+9
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>
2014-06-17signal/x86/setup_frame: __put_user cleanupRiku Voipio1-12/+4
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>
2014-06-17signal/all: remove __get/__put_user return value readingRiku Voipio1-370/+364
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>
2014-06-16linux-user: Tell guest about big host page sizesAlexander Graf1-1/+1
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>
2014-06-16target-ppc: Store Quadword Conditional Drops Size BitTom Musta1-1/+1
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>
2014-06-16target-ppc: Confirm That .bss Pages Are ValidTom Musta1-3/+4
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>
2014-06-16target-ppc: Allow little-endian user mode.Doug Kwan1-1/+7
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>
2014-06-16target-ppc: Support little-endian PPC64 in user mode.Doug Kwan2-2/+19
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>
2014-06-09target-arm: A64: Implement two-register SHA instructionsPeter Maydell1-0/+2
Implement the two-register SHA instruction group from the optional Crypto Extensions. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 1401458125-27977-10-git-send-email-peter.maydell@linaro.org
2014-06-09target-arm: A64: Implement AES instructionsPeter Maydell1-0/+1
Implement the AES instructions from the optional Crypto Extensions. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 1401458125-27977-8-git-send-email-peter.maydell@linaro.org
2014-06-09target-arm: A64: Implement CRC instructionsPeter Maydell1-0/+1
Implement the optional A64 CRC instructions. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 1401458125-27977-6-git-send-email-peter.maydell@linaro.org
2014-06-09target-arm: A64: Use PMULL feature bit for PMULLPeter Maydell1-1/+1
Now that we have a separate ARM_FEATURE_V8_PMULL bit, use it for the A64 PMULL, not the AES feature bit. Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-06-09target-arm: add support for v8 VMULL.P64 instructionPeter Maydell1-0/+1
Add support for the VMULL.P64 polynomial 64x64 to 128 bit multiplication instruction in the A32/T32 instruction sets; this is part of the v8 Crypto Extensions. To do this we have to move the neon_pmull_64_{lo,hi} helpers from helper-a64.c into neon_helper.c so they can be used by the AArch32 translator. Inspired-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 1401386724-26529-4-git-send-email-peter.maydell@linaro.org
2014-06-09target-arm: add support for v8 SHA1 and SHA256 instructionsArd Biesheuvel1-0/+2
This adds support for the SHA1 and SHA256 instructions that are available on some v8 implementations of Aarch32. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 1401386724-26529-2-git-send-email-peter.maydell@linaro.org [PMM: * rebase * fix bad indent * add a missing UNDEF check for Q!=1 in the 3-reg SHA1/SHA256 case * use g_assert_not_reached() * don't re-extract bit 6 for the 2-reg-misc encodings * set the ELF HWCAP2 bits for the new features ] Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-06-05Merge remote-tracking branch 'remotes/bonzini/softmmu-smap' into stagingPeter Maydell1-0/+1
* remotes/bonzini/softmmu-smap: (33 commits) target-i386: cleanup x86_cpu_get_phys_page_debug target-i386: fix protection bits in the TLB for SMEP target-i386: support long addresses for 4MB pages (PSE-36) target-i386: raise page fault for reserved bits in large pages target-i386: unify reserved bits and NX bit check target-i386: simplify pte/vaddr calculation target-i386: raise page fault for reserved physical address bits target-i386: test reserved PS bit on PML4Es target-i386: set correct error code for reserved bit access target-i386: introduce support for 1 GB pages target-i386: introduce do_check_protect label target-i386: tweak handling of PG_NX_MASK target-i386: commonize checks for PAE and non-PAE target-i386: commonize checks for 4MB and 4KB pages target-i386: commonize checks for 2MB and 4KB pages target-i386: fix coding standards in x86_cpu_handle_mmu_fault target-i386: simplify SMAP handling in MMU_KSMAP_IDX target-i386: fix kernel accesses with SMAP and CPL = 3 target-i386: move check_io helpers to seg_helper.c target-i386: rename KSMAP to KNOSMAP ... Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-06-05softmmu: introduce cpu_ldst.hPaolo Bonzini1-0/+1
This will collect all load and store helpers soon. For now it is just a replacement for softmmu_exec.h, which this patch stops including directly, but we also include it where this will be necessary in order to simplify the next patch. Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-05-21target-i386: fix segment flags for SMM and VM86 modePaolo Bonzini1-1/+1
With the next patch, these need to be correct or VM86 tasks have the wrong CPL. The flags are basically what the Intel VMX documentation say is mandatory for entry into a VM86 guest. For consistency, SMM ought to have the same flags except with CPL=0. Tested-by: Kevin O'Connor <kevin@koconnor.net> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-05-13target-i386: the x86 CPL is stored in CS.selector - auto update hflags ↵Kevin O'Connor1-2/+0
accordingly. Instead of manually calling cpu_x86_set_cpl() when the CPL changes, check for CPL changes on calls to cpu_x86_load_seg_cache(R_CS). Every location that called cpu_x86_set_cpl() also called cpu_x86_load_seg_cache(R_CS), so cpu_x86_set_cpl() is no longer required. This fixes the SMM handler code as it was not setting/restoring the CPL level manually. Signed-off-by: Kevin O'Connor <kevin@koconnor.net> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-05-05linux-user: fix getrusage and wait4 failures with invalid rusage structPetar Jovanovic1-3/+8
Implementations of system calls getrusage and wait4 have not previously handled correctly cases when incorrect address of struct rusage is passed. This change makes sure return values are correctly set for these cases. Signed-off-by: Petar Jovanovic <petar.jovanovic@imgtec.com> Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
2014-05-02linux-user/elfload.c: Support ARM HWCAP2 flagsPeter Maydell1-1/+29
The ARM kernel has chosen to spill into the HWCAP2 ELF feature bit flags early, even though it hasn't yet exhausted all 32 bits of the HWCAP word. Add support for setting this in the same way we do for HWCAP. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
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