diff options
Diffstat (limited to 'sys/amd64/linux/linux_machdep.c')
| -rw-r--r-- | sys/amd64/linux/linux_machdep.c | 339 |
1 files changed, 339 insertions, 0 deletions
diff --git a/sys/amd64/linux/linux_machdep.c b/sys/amd64/linux/linux_machdep.c new file mode 100644 index 000000000000..d9cadf968620 --- /dev/null +++ b/sys/amd64/linux/linux_machdep.c @@ -0,0 +1,339 @@ +/*- + * Copyright (c) 2013 Dmitry Chagin + * Copyright (c) 2004 Tim J. Robbins + * Copyright (c) 2002 Doug Rabson + * Copyright (c) 2000 Marcel Moolenaar + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer + * in this position and unchanged. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/capsicum.h> +#include <sys/clock.h> +#include <sys/dirent.h> +#include <sys/fcntl.h> +#include <sys/file.h> +#include <sys/filedesc.h> +#include <sys/imgact.h> +#include <sys/kernel.h> +#include <sys/ktr.h> +#include <sys/limits.h> +#include <sys/lock.h> +#include <sys/malloc.h> +#include <sys/mman.h> +#include <sys/mutex.h> +#include <sys/priv.h> +#include <sys/proc.h> +#include <sys/resource.h> +#include <sys/resourcevar.h> +#include <sys/sched.h> +#include <sys/syscallsubr.h> +#include <sys/sysproto.h> +#include <sys/systm.h> +#include <sys/unistd.h> +#include <sys/vnode.h> +#include <sys/wait.h> + +#include <security/mac/mac_framework.h> + +#include <ufs/ufs/extattr.h> +#include <ufs/ufs/quota.h> +#include <ufs/ufs/ufsmount.h> + +#include <machine/frame.h> +#include <machine/md_var.h> +#include <machine/pcb.h> +#include <machine/psl.h> +#include <machine/segments.h> +#include <machine/specialreg.h> + +#include <vm/pmap.h> +#include <vm/vm.h> +#include <vm/vm_extern.h> +#include <vm/vm_kern.h> +#include <vm/vm_map.h> + +#include <x86/ifunc.h> +#include <x86/sysarch.h> + +#include <amd64/linux/linux.h> +#include <amd64/linux/linux_proto.h> +#include <compat/linux/linux_emul.h> +#include <compat/linux/linux_file.h> +#include <compat/linux/linux_ipc.h> +#include <compat/linux/linux_misc.h> +#include <compat/linux/linux_mmap.h> +#include <compat/linux/linux_signal.h> +#include <compat/linux/linux_util.h> + +int +linux_execve(struct thread *td, struct linux_execve_args *args) +{ + struct image_args eargs; + char *path; + int error; + + LINUX_CTR(execve); + + if (!LUSECONVPATH(td)) { + error = exec_copyin_args(&eargs, args->path, UIO_USERSPACE, + args->argp, args->envp); + } else { + LCONVPATHEXIST(td, args->path, &path); + error = exec_copyin_args(&eargs, path, UIO_SYSSPACE, args->argp, + args->envp); + LFREEPATH(path); + } + if (error == 0) + error = linux_common_execve(td, &eargs); + return (error); +} + +int +linux_set_upcall_kse(struct thread *td, register_t stack) +{ + + if (stack) + td->td_frame->tf_rsp = stack; + + /* + * The newly created Linux thread returns + * to the user space by the same path that a parent do. + */ + td->td_frame->tf_rax = 0; + return (0); +} + +int +linux_mmap2(struct thread *td, struct linux_mmap2_args *args) +{ + + return (linux_mmap_common(td, PTROUT(args->addr), args->len, args->prot, + args->flags, args->fd, args->pgoff)); +} + +int +linux_mprotect(struct thread *td, struct linux_mprotect_args *uap) +{ + + return (linux_mprotect_common(td, PTROUT(uap->addr), uap->len, uap->prot)); +} + +int +linux_madvise(struct thread *td, struct linux_madvise_args *uap) +{ + + return (linux_madvise_common(td, PTROUT(uap->addr), uap->len, uap->behav)); +} + +int +linux_iopl(struct thread *td, struct linux_iopl_args *args) +{ + int error; + + LINUX_CTR(iopl); + + if (args->level > 3) + return (EINVAL); + if ((error = priv_check(td, PRIV_IO)) != 0) + return (error); + if ((error = securelevel_gt(td->td_ucred, 0)) != 0) + return (error); + td->td_frame->tf_rflags = (td->td_frame->tf_rflags & ~PSL_IOPL) | + (args->level * (PSL_IOPL / 3)); + + return (0); +} + +int +linux_rt_sigsuspend(struct thread *td, struct linux_rt_sigsuspend_args *uap) +{ + l_sigset_t lmask; + sigset_t sigmask; + int error; + + LINUX_CTR2(rt_sigsuspend, "%p, %ld", + uap->newset, uap->sigsetsize); + + if (uap->sigsetsize != sizeof(l_sigset_t)) + return (EINVAL); + + error = copyin(uap->newset, &lmask, sizeof(l_sigset_t)); + if (error) + return (error); + + linux_to_bsd_sigset(&lmask, &sigmask); + return (kern_sigsuspend(td, sigmask)); +} + +int +linux_pause(struct thread *td, struct linux_pause_args *args) +{ + struct proc *p = td->td_proc; + sigset_t sigmask; + + LINUX_CTR(pause); + + PROC_LOCK(p); + sigmask = td->td_sigmask; + PROC_UNLOCK(p); + return (kern_sigsuspend(td, sigmask)); +} + +int +linux_sigaltstack(struct thread *td, struct linux_sigaltstack_args *uap) +{ + stack_t ss, oss; + l_stack_t lss; + int error; + + memset(&lss, 0, sizeof(lss)); + LINUX_CTR2(sigaltstack, "%p, %p", uap->uss, uap->uoss); + + if (uap->uss != NULL) { + error = copyin(uap->uss, &lss, sizeof(l_stack_t)); + if (error) + return (error); + + ss.ss_sp = PTRIN(lss.ss_sp); + ss.ss_size = lss.ss_size; + ss.ss_flags = linux_to_bsd_sigaltstack(lss.ss_flags); + } + error = kern_sigaltstack(td, (uap->uss != NULL) ? &ss : NULL, + (uap->uoss != NULL) ? &oss : NULL); + if (!error && uap->uoss != NULL) { + lss.ss_sp = PTROUT(oss.ss_sp); + lss.ss_size = oss.ss_size; + lss.ss_flags = bsd_to_linux_sigaltstack(oss.ss_flags); + error = copyout(&lss, uap->uoss, sizeof(l_stack_t)); + } + + return (error); +} + +int +linux_arch_prctl(struct thread *td, struct linux_arch_prctl_args *args) +{ + struct pcb *pcb; + int error; + + pcb = td->td_pcb; + LINUX_CTR2(arch_prctl, "0x%x, %p", args->code, args->addr); + + switch (args->code) { + case LINUX_ARCH_SET_GS: + if (args->addr < VM_MAXUSER_ADDRESS) { + set_pcb_flags(pcb, PCB_FULL_IRET); + pcb->pcb_gsbase = args->addr; + td->td_frame->tf_gs = _ugssel; + error = 0; + } else + error = EPERM; + break; + case LINUX_ARCH_SET_FS: + if (args->addr < VM_MAXUSER_ADDRESS) { + set_pcb_flags(pcb, PCB_FULL_IRET); + pcb->pcb_fsbase = args->addr; + td->td_frame->tf_fs = _ufssel; + error = 0; + } else + error = EPERM; + break; + case LINUX_ARCH_GET_FS: + error = copyout(&pcb->pcb_fsbase, PTRIN(args->addr), + sizeof(args->addr)); + break; + case LINUX_ARCH_GET_GS: + error = copyout(&pcb->pcb_gsbase, PTRIN(args->addr), + sizeof(args->addr)); + break; + default: + error = EINVAL; + } + return (error); +} + +int +linux_set_cloned_tls(struct thread *td, void *desc) +{ + struct pcb *pcb; + + if ((uint64_t)desc >= VM_MAXUSER_ADDRESS) + return (EPERM); + + pcb = td->td_pcb; + pcb->pcb_fsbase = (register_t)desc; + td->td_frame->tf_fs = _ufssel; + + return (0); +} + +int futex_xchgl_nosmap(int oparg, uint32_t *uaddr, int *oldval); +int futex_xchgl_smap(int oparg, uint32_t *uaddr, int *oldval); +DEFINE_IFUNC(, int, futex_xchgl, (int, uint32_t *, int *)) +{ + + return ((cpu_stdext_feature & CPUID_STDEXT_SMAP) != 0 ? + futex_xchgl_smap : futex_xchgl_nosmap); +} + +int futex_addl_nosmap(int oparg, uint32_t *uaddr, int *oldval); +int futex_addl_smap(int oparg, uint32_t *uaddr, int *oldval); +DEFINE_IFUNC(, int, futex_addl, (int, uint32_t *, int *)) +{ + + return ((cpu_stdext_feature & CPUID_STDEXT_SMAP) != 0 ? + futex_addl_smap : futex_addl_nosmap); +} + +int futex_orl_nosmap(int oparg, uint32_t *uaddr, int *oldval); +int futex_orl_smap(int oparg, uint32_t *uaddr, int *oldval); +DEFINE_IFUNC(, int, futex_orl, (int, uint32_t *, int *)) +{ + + return ((cpu_stdext_feature & CPUID_STDEXT_SMAP) != 0 ? + futex_orl_smap : futex_orl_nosmap); +} + +int futex_andl_nosmap(int oparg, uint32_t *uaddr, int *oldval); +int futex_andl_smap(int oparg, uint32_t *uaddr, int *oldval); +DEFINE_IFUNC(, int, futex_andl, (int, uint32_t *, int *)) +{ + + return ((cpu_stdext_feature & CPUID_STDEXT_SMAP) != 0 ? + futex_andl_smap : futex_andl_nosmap); +} + +int futex_xorl_nosmap(int oparg, uint32_t *uaddr, int *oldval); +int futex_xorl_smap(int oparg, uint32_t *uaddr, int *oldval); +DEFINE_IFUNC(, int, futex_xorl, (int, uint32_t *, int *)) +{ + + return ((cpu_stdext_feature & CPUID_STDEXT_SMAP) != 0 ? + futex_xorl_smap : futex_xorl_nosmap); +} |