| linux32_machdep.c (166731) | linux32_machdep.c (166944) |
|---|---|
| 1/*- 2 * Copyright (c) 2004 Tim J. Robbins 3 * Copyright (c) 2002 Doug Rabson 4 * Copyright (c) 2000 Marcel Moolenaar 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions --- 15 unchanged lines hidden (view full) --- 24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31#include <sys/cdefs.h> | 1/*- 2 * Copyright (c) 2004 Tim J. Robbins 3 * Copyright (c) 2002 Doug Rabson 4 * Copyright (c) 2000 Marcel Moolenaar 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions --- 15 unchanged lines hidden (view full) --- 24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31#include <sys/cdefs.h> |
| 32__FBSDID("$FreeBSD: head/sys/amd64/linux32/linux32_machdep.c 166731 2007-02-15 01:20:43Z jkim $"); | 32__FBSDID("$FreeBSD: head/sys/amd64/linux32/linux32_machdep.c 166944 2007-02-24 16:49:25Z netchild $"); |
| 33 34#include <sys/param.h> 35#include <sys/kernel.h> 36#include <sys/systm.h> 37#include <sys/file.h> 38#include <sys/fcntl.h> 39#include <sys/clock.h> 40#include <sys/imgact.h> --- 522 unchanged lines hidden (view full) --- 563 564 if (args->flags & CLONE_VM) 565 ff |= RFMEM; 566 if (args->flags & CLONE_SIGHAND) 567 ff |= RFSIGSHARE; 568 /* 569 * XXX: in linux sharing of fs info (chroot/cwd/umask) 570 * and open files is independant. in fbsd its in one | 33 34#include <sys/param.h> 35#include <sys/kernel.h> 36#include <sys/systm.h> 37#include <sys/file.h> 38#include <sys/fcntl.h> 39#include <sys/clock.h> 40#include <sys/imgact.h> --- 522 unchanged lines hidden (view full) --- 563 564 if (args->flags & CLONE_VM) 565 ff |= RFMEM; 566 if (args->flags & CLONE_SIGHAND) 567 ff |= RFSIGSHARE; 568 /* 569 * XXX: in linux sharing of fs info (chroot/cwd/umask) 570 * and open files is independant. in fbsd its in one |
| 571 * structure but in reality it doesnt make any problems 572 * because both this flags are set at once usually. | 571 * structure but in reality it doesn't cause any problems 572 * because both of these flags are usually set together. |
| 573 */ 574 if (!(args->flags & (CLONE_FILES | CLONE_FS))) 575 ff |= RFFDG; 576 577 /* 578 * Attempt to detect when linux_clone(2) is used for creating 579 * kernel threads. Unfortunately despite the existence of the 580 * CLONE_THREAD flag, version of linuxthreads package used in 581 * most popular distros as of beginning of 2005 doesn't make | 573 */ 574 if (!(args->flags & (CLONE_FILES | CLONE_FS))) 575 ff |= RFFDG; 576 577 /* 578 * Attempt to detect when linux_clone(2) is used for creating 579 * kernel threads. Unfortunately despite the existence of the 580 * CLONE_THREAD flag, version of linuxthreads package used in 581 * most popular distros as of beginning of 2005 doesn't make |
| 582 * any use of it. Therefore, this detection relay fully on | 582 * any use of it. Therefore, this detection relies on |
| 583 * empirical observation that linuxthreads sets certain 584 * combination of flags, so that we can make more or less 585 * precise detection and notify the FreeBSD kernel that several 586 * processes are in fact part of the same threading group, so 587 * that special treatment is necessary for signal delivery 588 * between those processes and fd locking. 589 */ 590 if ((args->flags & 0xffffff00) == THREADING_FLAGS) --- 237 unchanged lines hidden (view full) --- 828 * limit to stack size of STACK_SIZE. Its just not 829 * enforced explicitly in linux. But, here we impose 830 * a limit of (STACK_SIZE - GUARD_SIZE) on the stack 831 * region, since we can do this with our mmap. 832 * 833 * Our mmap with MAP_STACK takes addr as the maximum 834 * downsize limit on BOS, and as len the max size of 835 * the region. It them maps the top SGROWSIZ bytes, | 583 * empirical observation that linuxthreads sets certain 584 * combination of flags, so that we can make more or less 585 * precise detection and notify the FreeBSD kernel that several 586 * processes are in fact part of the same threading group, so 587 * that special treatment is necessary for signal delivery 588 * between those processes and fd locking. 589 */ 590 if ((args->flags & 0xffffff00) == THREADING_FLAGS) --- 237 unchanged lines hidden (view full) --- 828 * limit to stack size of STACK_SIZE. Its just not 829 * enforced explicitly in linux. But, here we impose 830 * a limit of (STACK_SIZE - GUARD_SIZE) on the stack 831 * region, since we can do this with our mmap. 832 * 833 * Our mmap with MAP_STACK takes addr as the maximum 834 * downsize limit on BOS, and as len the max size of 835 * the region. It them maps the top SGROWSIZ bytes, |
| 836 * and autgrows the region down, up to the limit | 836 * and auto grows the region down, up to the limit |
| 837 * in addr. 838 * 839 * If we don't use the MAP_STACK option, the effect 840 * of this code is to allocate a stack region of a 841 * fixed size of (STACK_SIZE - GUARD_SIZE). 842 */ 843 844 if ((caddr_t)PTRIN(linux_args->addr) + linux_args->len > --- 345 unchanged lines hidden --- | 837 * in addr. 838 * 839 * If we don't use the MAP_STACK option, the effect 840 * of this code is to allocate a stack region of a 841 * fixed size of (STACK_SIZE - GUARD_SIZE). 842 */ 843 844 if ((caddr_t)PTRIN(linux_args->addr) + linux_args->len > --- 345 unchanged lines hidden --- |