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2012-04-06linux-user: resolve reserved_va vma downwardsPeter Maydell1-11/+24
After consulting with Paul Brook, we concluded that it's best to search the VMA space downwards, so that we don't even get the chance to conflict with the brk range. This patch resolves a bunch of allocation conflicts when using -R. Signed-off-by: Alexander Graf <agraf@suse.de> [minor changes to get it to apply -- PMM] Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
2011-05-08Fix typo in comment (truely -> truly)Stefan Weil1-1/+1
Signed-off-by: Stefan Weil <weil@mail.berlios.de> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2011-03-03linux-user: fix compile failure if !CONFIG_USE_GUEST_BASEPeter Maydell1-0/+4
If CONFIG_USE_GUEST_BASE is not defined, gcc complains: linux-user/mmap.c:235: error: comparison of unsigned expression >= 0 is always true because RESERVED_VA is #defined to 0. Since mmap_find_vma_reserved() will never be called anyway if RESERVED_VA is always 0, fix this by simply #ifdef'ing away the function and its callsite. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2010-12-03linux-user: mmap_reserve() not controlled by RESERVED_VAamateur1-1/+3
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>
2010-09-18linux-user: fix types in a comparisonBlue Swirl1-1/+1
-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>
2010-07-30linux-user: fix build on hosts not using guest baseAurelien Jarno1-7/+7
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.
2010-05-29Pre-allocate guest address spacePaul Brook1-6/+114
Allow pre-allocation of the guest virtual address space in usermode emulation. Signed-off-by: Paul Brook <paul@codesourcery.com>
2010-05-28linux-user: Use qemu-malloc.c.Richard Henderson1-52/+0
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>
2010-05-05Remove PAGE_RESERVEDPaul Brook1-19/+0
The usermode PAGE_RESERVED code is not required by the current mmap implementation, and is already broken when guest_base != 0. Unfortunately the bsd emulation still uses the old mmap implementation, so we can't rip it out altogether. Signed-off-by: Paul Brook <paul@codesourcery.com>
2010-03-12Fix usermode virtual address typePaul Brook1-1/+1
Usermode virtual addresses are abi_ulong, not target_ulong. Signed-off-by: Paul Brook <paul@codesourcery.com>
2010-03-12linux-user: Fix mmap_find_vma returning invalid addresses.Richard Henderson1-24/+78
Don't return addresses that aren't properly aligned for the guest, e.g. when the guest has a larger page size than the host. Don't return addresses that are outside the virtual address space for the target, by paying proper attention to the h2g/g2h macros. At the same time, place the default mapping base for 64-bit guests (on 64-bit hosts) outside the low 4G. Consistently interpret mmap_next_start in the guest address space. Signed-off-by: Richard Henderson <rth@twiddle.net>
2010-03-12linux-user: Use h2g_valid in qemu_vmalloc.Richard Henderson1-5/+4
Signed-off-by: Richard Henderson <rth@twiddle.net>
2010-01-26mmap_frag() users only check for -1 errorJuan Quintela1-1/+1
Signed-off-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-26linux-user/mmap.c: fix warnings with _FORTIFY_SOURCEKirill A. Shutemov1-2/+4
CC i386-linux-user/mmap.o cc1: warnings being treated as errors /usr/src/RPM/BUILD/qemu-0.11.92/linux-user/mmap.c: In function 'mmap_frag': /usr/src/RPM/BUILD/qemu-0.11.92/linux-user/mmap.c:253: error: ignoring return value of 'pread', declared with attribute warn_unused_result /usr/src/RPM/BUILD/qemu-0.11.92/linux-user/mmap.c: In function 'target_mmap': /usr/src/RPM/BUILD/qemu-0.11.92/linux-user/mmap.c:477: error: ignoring return value of 'pread', declared with attribute warn_unused_result make[1]: *** [mmap.o] Error 1 Signed-off-by: Kirill A. Shutemov <kirill@shutemov.name> Signed-off-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-09-25__thread should be before real typeJuan Quintela1-1/+1
Signed-off-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2009-09-05Fix Sparse warnings: add "static"Blue Swirl1-1/+1
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2009-08-25linux-user: Rewrite mmap_find_vma() to work fine on 64-bit hosts with 32-bit ↵Kirill A. Shutemov1-36/+43
targets qemu's page table can be incomple if /proc/self/maps is unavailable or host allocating a memory with mmap(), so we can't use it to find free memory area. New version mmap_find_vma() uses mmap() without MAP_FIXED to find free memory. Tested-by: Martin Mohring <martin.mohring@opensuse.org> : quite some time ago this patch had been sent by Kirill to the QEMU ml. At that time, the patch was rejected. Now we found out why the current user mode memory allocator sometimes fails: - Kernel Bug linux/fs/proc/task_mmu.c (fixed after 2.6.27) http://bugzilla.kernel.org/attachment.cgi?id=17219 - use of proc file system to find memory mappings => bad idea So I please apply the attached patch from Kirill to qemu to fix this longstanding bug, because it causes all older linux distros (using kernel 2.6.26 or older) to fail the QEMU memory allocator in user mode. Signed-off-by: Kirill A. Shutemov <kirill@shutemov.name> Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
2009-07-27rename USE_NPTL to CONFIG_USE_NPTLJuan Quintela1-1/+1
Signed-off-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-07-20Fix most warnings (errors with -Werror) when debugging is enabledBlue Swirl1-7/+9
I used the following command to enable debugging: perl -p -i -e 's/^\/\/#define DEBUG/#define DEBUG/g' * */* */*/* Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2009-07-16Update to a hopefully more future proof FSF addressBlue Swirl1-3/+1
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2009-06-16linux-user: initialize mmap_mutex properlyNathan Froyd1-1/+1
We initialize mmap_mutex in any child threads/processes, but we need to correctly statically initialize it for the original process. Signed-off-by: Nathan Froyd <froydnj@codesourcery.com> Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
2009-06-16export mmap_find_vma for shmatRiku Voipio1-1/+1
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
2009-02-03Partialy fix mmap at EOF for large pagesize targets in user-mode.edgar_igl1-2/+37
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6510 c046a42c-6fe2-441c-8c8c-71466251a162
2009-01-28Fix qemu_malloc.malc1-0/+2
make {linux,bsd}-user qemu_realloc handle ptr == NULL correctly. spotted by malc. git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6466 c046a42c-6fe2-441c-8c8c-71466251a162
2009-01-23linux-user: add qemu_realloc() implementation to unbreak the build (Gerd ↵aliguori1-0/+13
Hoffman) Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6412 c046a42c-6fe2-441c-8c8c-71466251a162
2009-01-05Fix more FSF addressesblueswir11-1/+2
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6192 c046a42c-6fe2-441c-8c8c-71466251a162
2008-12-15Fix mremap, based on patch by Kirill A. Shutemovblueswir11-8/+11
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6056 c046a42c-6fe2-441c-8c8c-71466251a162
2008-12-11Fix compiling without MREMAP_FIXEDblueswir11-1/+4
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5979 c046a42c-6fe2-441c-8c8c-71466251a162
2008-12-08linux-user: mremap(): handle MREMAP_FIXED and MREMAP_MAYMOVE correctlyaurel321-6/+28
Signed-off-by: Kirill A. Shutemov <kirill@shutemov.name> Acked-by: Edgar E. Iglesias <edgar.iglesias@gmail.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5959 c046a42c-6fe2-441c-8c8c-71466251a162
2008-12-08linux-user: mmap: add check if requested memory area fits target address spaceaurel321-0/+10
Signed-off-by: Kirill A. Shutemov <kirill@shutemov.name> Acked-by: Edgar E. Iglesias <edgar.iglesias@gmail.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5958 c046a42c-6fe2-441c-8c8c-71466251a162
2008-10-02Include qemu-common.h in order to get prototypes for qemu_malloc etc.blueswir11-0/+1
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5402 c046a42c-6fe2-441c-8c8c-71466251a162
2008-06-09Prevent guest reusing host memory allocations.pbrook1-0/+46
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4710 c046a42c-6fe2-441c-8c8c-71466251a162
2008-06-07Multithreaded locking fixes.pbrook1-0/+16
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4692 c046a42c-6fe2-441c-8c8c-71466251a162
2008-06-02Multithreaded locking for mmap().pbrook1-27/+73
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4654 c046a42c-6fe2-441c-8c8c-71466251a162
2008-05-31Mark host brk() area as reserved.pbrook1-0/+16
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4637 c046a42c-6fe2-441c-8c8c-71466251a162
2008-04-26Teach mmap to not overwrite reserved pages and fix brk return value (Richard ↵balrog1-1/+12
Purdie). git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4255 c046a42c-6fe2-441c-8c8c-71466251a162
2008-04-24Cope with arch-specific page protection flags in mmap (Richard Purdie).balrog1-2/+1
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4250 c046a42c-6fe2-441c-8c8c-71466251a162
2008-03-14Use TARGET_FMT_lx.edgar_igl1-2/+1
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4061 c046a42c-6fe2-441c-8c8c-71466251a162
2007-12-12Mark host pages as reserved (Magnus Damm).balrog1-1/+1
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3813 c046a42c-6fe2-441c-8c8c-71466251a162
2007-11-14fixed target_mmap() if host page size < TARGET_PAGE_SIZEbellard1-138/+126
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3642 c046a42c-6fe2-441c-8c8c-71466251a162
2007-11-02Fix compiler warnings, by Stefan Weil.ths1-21/+23
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3507 c046a42c-6fe2-441c-8c8c-71466251a162
2007-10-14 Support for 32 bit ABI on 64 bit targets (only enabled Sparc64)blueswir11-19/+19
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3396 c046a42c-6fe2-441c-8c8c-71466251a162
2007-09-30Fix mmap to handle differing host/target page sizes, by Edgar E. Iglesias.ths1-37/+65
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3291 c046a42c-6fe2-441c-8c8c-71466251a162
2007-09-27memset string pages to zero to avoid putting random data on the stackj_mayer1-3/+3
that may make some program crash at startup. Fix unsigned long / target_ulong confusion (more to do). Fix missing g2h macros. git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3249 c046a42c-6fe2-441c-8c8c-71466251a162
2007-09-17find -type f | xargs sed -i 's/[\t ]*$//g' # Yes, again. Note the star in ↵ths1-9/+9
the regex. git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3177 c046a42c-6fe2-441c-8c8c-71466251a162
2007-09-16find -type f | xargs sed -i 's/[\t ]$//g' # on most filesths1-24/+24
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3173 c046a42c-6fe2-441c-8c8c-71466251a162
2007-06-03Add __mips__to mmap specialcase.ths1-3/+3
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2932 c046a42c-6fe2-441c-8c8c-71466251a162
2006-10-22ColdFire target.pbrook1-1/+1
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2196 c046a42c-6fe2-441c-8c8c-71466251a162
2006-03-25Avoid accessing guest memory directly in usermode emulation.pbrook1-76/+88
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1790 c046a42c-6fe2-441c-8c8c-71466251a162
2006-02-04Make target_mmap always return -1 on failure.pbrook1-6/+12
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1741 c046a42c-6fe2-441c-8c8c-71466251a162
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