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2017-03-09syscall-emul: Add functionality to open syscallsBrandon Potter
This changeset adds refactors the existing open system call, adds the openat variant (enabled for x86 builds), and adds additional "special file" test cases for /proc/meminfo and /etc/passwd. Change-Id: I6f429db65bbf2a28ffa3fd12df518c2d0de49663 Reviewed-on: https://gem5-review.googlesource.com/2265 Maintainer: Jason Lowe-Power <jason@lowepower.com> Reviewed-by: Tony Gutierrez <anthony.gutierrez@amd.com> Reviewed-by: Michael LeBeane <Michael.Lebeane@amd.com>
2016-11-09syscall_emul: [patch 5/22] remove LiveProcess class and use Process insteadBrandon Potter
The EIOProcess class was removed recently and it was the only other class which derived from Process. Since every Process invocation is also a LiveProcess invocation, it makes sense to simplify the organization by combining the fields from LiveProcess into Process.
2016-11-09style: [patch 3/22] reduce include dependencies in some headersBrandon Potter
Used cppclean to help identify useless includes and removed them. This involved erroneously included headers, but also cases where forward declarations could have been used rather than a full include.
2016-11-09style: [patch 1/22] use /r/3648/ to reorganize includesBrandon Potter
2016-11-17alpha: Remove ALPHA tru64 support and associated testsAndreas Hansson
No one appears to be using it, and it is causing build issues and increases the development and maintenance effort.
2016-06-20kern, arm: Dump dmesg on kernel panic/oopsAndreas Sandberg
Add helper functions to dump the guest kernel's dmesg buffer to a text file in m5out. This functionality is split into two parts. First, a dmesg dump function that can be used in other places: void Linux::dumpDmesg(ThreadContext *, std::ostream &) This function is used to implement two PCEvents: DmesgDumpEvent and KernelPanic event. The only difference between the two is that the latter produces a gem5 panic instead of a warning in addition to dumping the kernel log. Change-Id: I6d2af1d666ace57124089648ea906f6c787ac63c Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Reviewed-by: Gabor Dozsa <gabor.dozsa@arm.com>
2016-04-01syscall_emul: remove mmapFlagTableSteve Reinhardt
After all this it turns out we don't even use it.
2016-04-01syscall_emul: factor out flag tables into common fileSteve Reinhardt
The openFlagTable and mmapFlagTables for emulated Linux platforms are basically identical, but are specified repetitively for every platform. Use a common file that gets included for each platform so that we only have one copy, making them more consistent and simplifying changes (like adding #ifdefs). In the process, made some minor fixes that slipped through due to previous inconsistencies, and added more #ifdefs to try to fix building on alternative hosts.
2016-03-17syscall_emul: move mmapGrowsDown() to LiveProcessSteve Reinhardt
The mmapGrowsDown() method was a static method on the OperatingSystem class (and derived classes), which worked OK for the templated syscall emulation methods, but made it hard to access elsewhere. This patch moves the method to be a virtual function on the LiveProcess method, where it can be overridden for specific platforms (for now, Alpha). This patch also changes the value of mmapGrowsDown() from being false by default and true only on X86Linux32 to being true by default and false only on Alpha, which seems closer to reality (though in reality most people use ASLR and this doesn't really matter anymore). In the process, also got rid of the unused mmap_start field on LiveProcess and OperatingSystem mmapGrowsUp variable.
2016-03-17syscall_emul: add many Linux kernel flagsBrandon Potter
2016-03-17syscall_emul: rename OpenFlagTransTable structBrandon Potter
The structure definition only had the open system call flag set in mind when it was named, so we rename it here with the intention of using it to define additional tables to translate flags for other system calls in the future.
2015-10-12misc: Remove redundant compiler-specific definesAndreas Hansson
This patch moves away from using M5_ATTR_OVERRIDE and the m5::hashmap (and similar) abstractions, as these are no longer needed with gcc 4.7 and clang 3.1 as minimum compiler versions.
2015-10-10sim: Don't quiesce UDelayEvents with 0 latencyJoel Hestness
ARM uses UDelayEvents to emulate kernel __*udelay functions and speed up simulation. UDelayEvents call Pseudoinst::quiesceNs to quiesce the system for a specified delay. Changeset 10341:0b4d10f53c2d introduced the requirement that any quiesce process that is started must also be completed by scheduling an EndQuiesceEvent. This change causes the CPU to hang if an IsQuiesce instruction is executed, but the corresponding EndQuiesceEvent is not scheduled. Changeset 11058:d0934b57735a introduces a fix for uses of PseudoInst::quiesce* that would conditionally execute the EndQuiesceEvent. ARM UDelayEvents specify quiesce period of 0 ns (src/arch/arm/linux/system.cc), so changeset 11058 causes these events to now execute full quiesce processes, greatly increasing the total instructions executed in kernel delay loops and slowing simulation. This patch updates the UDelayEvent to conditionally execute PseudoInst::quiesceNs (**a quiesce operation**) only if the specified delay is >0 ns. The result is ARM delay loops no longer execute instructions for quiesce handling, and regression time returns to normal.
2015-07-24style: change Process function calls to use camelCaseBrandon Potter
The Process class methods were using an improper style and this subsequently bled into the system call code. The following regular expressions should be helpful if someone transitions private system call patches on top of these changesets: s/alloc_fd/allocFD/ s/sim_fd(/simFD(/ s/sim_fd_obj/getFDEntry/ s/fix_file_offsets/fixFileOffsets/ s/find_file_offsets/findFileOffsets/
2015-07-07sim: Refactor the serialization base classAndreas Sandberg
Objects that are can be serialized are supposed to inherit from the Serializable class. This class is meant to provide a unified API for such objects. However, so far it has mainly been used by SimObjects due to some fundamental design limitations. This changeset redesigns to the serialization interface to make it more generic and hide the underlying checkpoint storage. Specifically: * Add a set of APIs to serialize into a subsection of the current object. Previously, objects that needed this functionality would use ad-hoc solutions using nameOut() and section name generation. In the new world, an object that implements the interface has the methods serializeSection() and unserializeSection() that serialize into a named /subsection/ of the current object. Calling serialize() serializes an object into the current section. * Move the name() method from Serializable to SimObject as it is no longer needed for serialization. The fully qualified section name is generated by the main serialization code on the fly as objects serialize sub-objects. * Add a scoped ScopedCheckpointSection helper class. Some objects need to serialize data structures, that are not deriving from Serializable, into subsections. Previously, this was done using nameOut() and manual section name generation. To simplify this, this changeset introduces a ScopedCheckpointSection() helper class. When this class is instantiated, it adds a new /subsection/ and subsequent serialization calls during the lifetime of this helper class happen inside this section (or a subsection in case of nested sections). * The serialize() call is now const which prevents accidental state manipulation during serialization. Objects that rely on modifying state can use the serializeOld() call instead. The default implementation simply calls serialize(). Note: The old-style calls need to be explicitly called using the serializeOld()/serializeSectionOld() style APIs. These are used by default when serializing SimObjects. * Both the input and output checkpoints now use their own named types. This hides underlying checkpoint implementation from objects that need checkpointing and makes it easier to change the underlying checkpoint storage code.
2015-04-29arch, base, dev, kern, sym: FreeBSD supportRuslan Bukin
This adds support for FreeBSD/aarch64 FS and SE mode (basic set of syscalls only) Committed by: Nilay Vaish <nilay@cs.wisc.edu>
2015-04-22syscall_emul: implement clock_gettime system callBrandon Potter
2014-10-16misc: Move AddrRangeList from port.hh to addr_range.hhAndreas Hansson
The new location seems like a better fit. The iterator typedefs are removed in favour of using C++11 auto.
2014-10-16dev: Use shared_ptr for Arguments::DataAndreas Hansson
This patch takes a first few steps in transitioning from the ad-hoc RefCountingPtr to the c++11 shared_ptr. There are no changes in behaviour, and the code modifications are mainly introducing the use of make_shared. Note that the class could use unique_ptr rather than shared_ptr, was it not for the postfix increment and decrement operators.
2014-09-03arch: Cleanup unused ISA traits constantsAndreas Hansson
This patch prunes unused values, and also unifies how the values are defined (not using an enum for ALPHA), aligning the use of int vs Addr etc. The patch also removes the duplication of PageBytes/PageShift and VMPageSize/LogVMPageSize. For all ISAs the two pairs had identical values and the latter has been removed.
2014-07-18kern: get rid of unused linux syscall filesSteve Reinhardt
2014-01-24sim: Add openat/fstatat syscalls and fix mremapChris Adeniyi-Jones
This patch adds support for the openat and fstatat syscalls and broadens the support for mremap to make it work on OS X.
2013-09-04arch: Resurrect the NOISA build target and rename it NULLAndreas Hansson
This patch makes it possible to once again build gem5 without any ISA. The main purpose is to enable work around the interconnect and memory system without having to build any CPU models or device models. The regress script is updated to include the NULL ISA target. Currently no regressions make use of it, but all the testers could (and perhaps should) transition to it. --HG-- rename : build_opts/NOISA => build_opts/NULL rename : src/arch/noisa/SConsopts => src/arch/null/SConsopts rename : src/arch/noisa/cpu_dummy.hh => src/arch/null/cpu_dummy.hh rename : src/cpu/intr_control.cc => src/cpu/intr_control_noisa.cc
2013-09-04arch: Header clean up for NOISA resurrectionAndreas Hansson
This patch is a first step to getting NOISA working again. A number of redundant includes make life more difficult than it has to be and this patch simply removes them. There are also some redundant forward declarations removed.
2013-02-19scons: Add warning for missing declarationsAndreas Hansson
This patch enables warnings for missing declarations. To avoid issues with SWIG-generated code, the warning is only applied to non-SWIG code.
2013-02-19scons: Fix up numerous warnings about name shadowingAndreas Hansson
This patch address the most important name shadowing warnings (as produced when using gcc/clang with -Wshadow). There are many locations where constructor parameters and function parameters shadow local variables, but these are left unchanged.
2013-01-07base: Encapsulate the underlying fields in AddrRangeAndreas Hansson
This patch makes the start and end address private in a move to prevent direct manipulation and matching of ranges based on these fields. This is done so that a transition to ranges with interleaving support is possible. As a result of hiding the start and end, a number of member functions are needed to perform the comparisons and manipulations that previously took place directly on the members. An accessor function is provided for the start address, and a function is added to test if an address is within a range. As a result of the latter the != and == operator is also removed in favour of the member function. A member function that returns a string representation is also created to allow debug printing. In general, this patch does not add any functionality, but it does take us closer to a situation where interleaving (and more cleverness) can be added under the bonnet without exposing it to the user. More on that in a later patch.
2012-09-21SE: Ignore FUTEX_PRIVATE_FLAG of sys_futexLluc Alvarez
This patch ignores the FUTEX_PRIVATE_FLAG of the sys_futex system call in SE mode. With this patch, when sys_futex with the options FUTEX_WAIT_PRIVATE or FUTEX_WAKE_PRIVATE is emulated, the FUTEX_PRIVATE_FLAG is ignored and so their behaviours are the regular FUTEX_WAIT and FUTEX_WAKE. Emulating FUTEX_WAIT_PRIVATE and FUTEX_WAKE_PRIVATE as if they were non-private is safe from a functional point of view. The FUTEX_PRIVATE_FLAG does not change the semantics of the futex, it's just a mechanism to improve performance under certain circunstances that can be ignored in SE mode.
2012-08-06syscall emulation: Enabled getrlimit and getrusage for x86.Marc Orr
Added/moved rlimit constants to base linux header file. This patch is a revised version of Vince Weaver's earlier patch.
2012-08-06syscall_emul: clean up open() code a bit.Steve Reinhardt
2012-08-06syscall emulation: Clean up ioctl handling, and implement for x86.Marc Orr
Enable different whitelists for different OS/arch combinations, since some use the generic Linux definitions only, and others use definitions inherited from earlier Unix flavors on those architectures. Also update x86 function pointers so ioctl is no longer unimplemented on that platform. This patch is a revised version of Vince Weaver's earlier patch.
2012-07-10syscall emulation: Add the futex system call.Marc Orr
2012-07-09Port: Add getAddrRanges to master port (asking slave port)Andreas Hansson
This patch adds getAddrRanges to the master port, and thus avoids going through getSlavePort to be able to ask the slave. Similar to the previous patch that added isSnooping to the SlavePort, this patch aims to introduce an additional level of hierarchy in the ports (base port being protocol-agnostic) and getSlave/MasterPort will return port pointers to these base classes. The function is named getAddrRanges also on the master port, but does nothing besides asking the connected slave port. The slave port, as before, has to provide an implementation and actually produce a list of address ranges. The initial design used the name getSlaveAddrRanges for the new function, but the more verbose name was later changed.
2012-07-02gcc: Fix warnings for gcc 4.7 and clang 3.1Andreas Hansson
This patch fixes two warnings, one related to a narrowing conversion (int to MachInst), and one due to the cast operator for arguments and a mismatch in const-ness (const void* and void*).
2012-05-30gcc: Small fixes to compile with gcc 4.7Andreas Hansson
This patch makes two very minor changes to please gcc 4.7. The CopyData function no longer exists and this has been replaced. For some reason previous versions of gcc did not complain on the const char casting not having an implementation, but this is now addressed.
2012-03-30MEM: Introduce the master/slave port sub-classes in C++William Wang
This patch introduces the notion of a master and slave port in the C++ code, thus bringing the previous classification from the Python classes into the corresponding simulation objects and memory objects. The patch enables us to classify behaviours into the two bins and add assumptions and enfore compliance, also simplifying the two interfaces. As a starting point, isSnooping is confined to a master port, and getAddrRanges to slave ports. More of these specilisations are to come in later patches. The getPort function is not getMasterPort and getSlavePort, and returns a port reference rather than a pointer as NULL would never be a valid return value. The default implementation of these two functions is placed in MemObject, and calls fatal. The one drawback with this specific patch is that it requires some code duplication, e.g. QueuedPort becomes QueuedMasterPort and QueuedSlavePort, and BusPort becomes BusMasterPort and BusSlavePort (avoiding multiple inheritance). With the later introduction of the port interfaces, moving the functionality outside the port itself, a lot of the duplicated code will disappear again.
2012-02-24MEM: Make port proxies use references rather than pointersAndreas Hansson
This patch is adding a clearer design intent to all objects that would not be complete without a port proxy by making the proxies members rathen than dynamically allocated. In essence, if NULL would not be a valid value for the proxy, then we avoid using a pointer to make this clear. The same approach is used for the methods using these proxies, such as loadSections, that now use references rather than pointers to better reflect the fact that NULL would not be an acceptable value (in fact the code would break and that is how this patch started out). Overall the concept of "using a reference to express unconditional composition where a NULL pointer is never valid" could be done on a much broader scale throughout the code base, but for now it is only done in the locations affected by the proxies.
2012-02-24CPU: Round-two unifying instr/data CPU ports across modelsAndreas Hansson
This patch continues the unification of how the different CPU models create and share their instruction and data ports. Most importantly, it forces every CPU to have an instruction and a data port, and gives these ports explicit getters in the BaseCPU (getDataPort and getInstPort). The patch helps in simplifying the code, make assumptions more explicit, andfurther ease future patches related to the CPU ports. The biggest changes are in the in-order model (that was not modified in the previous unification patch), which now moves the ports from the CacheUnit to the CPU. It also distinguishes the instruction fetch and load-store unit from the rest of the resources, and avoids the use of indices and casting in favour of keeping track of these two units explicitly (since they are always there anyways). The atomic, timing and O3 model simply return references to their already existing ports.
2012-01-30Merge with main repository.Gabe Black
2012-01-30MEM: Clean-up of Functional/Virtual/TranslatingPort remnantsAndreas Hansson
This patch cleans up forward declarations and a member-function prototype that still referred to the old FunctionalPort, VirtualPort and TranslatingPort. There is no change in functionality.
2012-01-28Merge with the main repo.Gabe Black
--HG-- rename : src/mem/vport.hh => src/mem/fs_translating_port_proxy.hh rename : src/mem/translating_port.cc => src/mem/se_translating_port_proxy.cc rename : src/mem/translating_port.hh => src/mem/se_translating_port_proxy.hh
2012-01-17MEM: Separate queries for snooping and address rangesAndreas Hansson
This patch simplifies the address-range determination mechanism and also unifies the naming across ports and devices. It further splits the queries for determining if a port is snooping and what address ranges it responds to (aiming towards a separation of cache-maintenance ports and pure memory-mapped ports). Default behaviours are such that most ports do not have to define isSnooping, and master ports need not implement getAddrRanges.
2012-01-17MEM: Add port proxies instead of non-structural portsAndreas Hansson
Port proxies are used to replace non-structural ports, and thus enable all ports in the system to correspond to a structural entity. This has the advantage of accessing memory through the normal memory subsystem and thus allowing any constellation of distributed memories, address maps, etc. Most accesses are done through the "system port" that is used for loading binaries, debugging etc. For the entities that belong to the CPU, e.g. threads and thread contexts, they wrap the CPU data port in a port proxy. The following replacements are made: FunctionalPort > PortProxy TranslatingPort > SETranslatingPortProxy VirtualPort > FSTranslatingPortProxy --HG-- rename : src/mem/vport.cc => src/mem/fs_translating_port_proxy.cc rename : src/mem/vport.hh => src/mem/fs_translating_port_proxy.hh rename : src/mem/translating_port.cc => src/mem/se_translating_port_proxy.cc rename : src/mem/translating_port.hh => src/mem/se_translating_port_proxy.hh
2012-01-07Merge with main repository.Gabe Black
2011-11-18SE/FS: Get rid of includes of config/full_system.hh.Gabe Black
2011-11-13SE/FS: Get rid of FULL_SYSTEM in kern.Gabe Black
2011-11-01SE/FS: Get rid of uses of FULL_SYSTEM in Alpha.Gabe Black
2011-10-31SE/FS: Make the functions available from the TC consistent between SE and FS.Gabe Black
2011-10-30SE/FS: Build the solaris object in both SE and FS.Gabe Black
2011-10-30SE/FS: Compile in system events in SE mode.Gabe Black