diff options
Diffstat (limited to 'sys/amd64/linux32/linux32_machdep.c')
| -rw-r--r-- | sys/amd64/linux32/linux32_machdep.c | 614 |
1 files changed, 614 insertions, 0 deletions
diff --git a/sys/amd64/linux32/linux32_machdep.c b/sys/amd64/linux32/linux32_machdep.c new file mode 100644 index 000000000000..7f1c85cee201 --- /dev/null +++ b/sys/amd64/linux32/linux32_machdep.c @@ -0,0 +1,614 @@ +/*- + * SPDX-License-Identifier: BSD-3-Clause + * + * 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/param.h> +#include <sys/lock.h> +#include <sys/mutex.h> +#include <sys/priv.h> +#include <sys/proc.h> +#include <sys/reg.h> +#include <sys/syscallsubr.h> + +#include <machine/md_var.h> +#include <machine/specialreg.h> +#include <x86/ifunc.h> + +#include <compat/freebsd32/freebsd32_util.h> +#include <amd64/linux32/linux.h> +#include <amd64/linux32/linux32_proto.h> +#include <compat/linux/linux_emul.h> +#include <compat/linux/linux_fork.h> +#include <compat/linux/linux_ipc.h> +#include <compat/linux/linux_mmap.h> +#include <compat/linux/linux_signal.h> +#include <compat/linux/linux_util.h> + +static void bsd_to_linux_rusage(struct rusage *ru, struct l_rusage *lru); + +struct l_old_select_argv { + l_int nfds; + l_uintptr_t readfds; + l_uintptr_t writefds; + l_uintptr_t exceptfds; + l_uintptr_t timeout; +} __packed; + +static void +bsd_to_linux_rusage(struct rusage *ru, struct l_rusage *lru) +{ + + lru->ru_utime.tv_sec = ru->ru_utime.tv_sec; + lru->ru_utime.tv_usec = ru->ru_utime.tv_usec; + lru->ru_stime.tv_sec = ru->ru_stime.tv_sec; + lru->ru_stime.tv_usec = ru->ru_stime.tv_usec; + lru->ru_maxrss = ru->ru_maxrss; + lru->ru_ixrss = ru->ru_ixrss; + lru->ru_idrss = ru->ru_idrss; + lru->ru_isrss = ru->ru_isrss; + lru->ru_minflt = ru->ru_minflt; + lru->ru_majflt = ru->ru_majflt; + lru->ru_nswap = ru->ru_nswap; + lru->ru_inblock = ru->ru_inblock; + lru->ru_oublock = ru->ru_oublock; + lru->ru_msgsnd = ru->ru_msgsnd; + lru->ru_msgrcv = ru->ru_msgrcv; + lru->ru_nsignals = ru->ru_nsignals; + lru->ru_nvcsw = ru->ru_nvcsw; + lru->ru_nivcsw = ru->ru_nivcsw; +} + +int +linux_copyout_rusage(struct rusage *ru, void *uaddr) +{ + struct l_rusage lru; + + bsd_to_linux_rusage(ru, &lru); + + return (copyout(&lru, uaddr, sizeof(struct l_rusage))); +} + +int +linux_readv(struct thread *td, struct linux_readv_args *uap) +{ + struct uio *auio; + int error; + + error = freebsd32_copyinuio(uap->iovp, uap->iovcnt, &auio); + if (error) + return (error); + error = kern_readv(td, uap->fd, auio); + freeuio(auio); + return (error); +} + +struct l_ipc_kludge { + l_uintptr_t msgp; + l_long msgtyp; +} __packed; + +int +linux_ipc(struct thread *td, struct linux_ipc_args *args) +{ + + switch (args->what & 0xFFFF) { + case LINUX_SEMOP: { + + return (kern_semop(td, args->arg1, PTRIN(args->ptr), + args->arg2, NULL)); + } + case LINUX_SEMGET: { + struct linux_semget_args a; + + a.key = args->arg1; + a.nsems = args->arg2; + a.semflg = args->arg3; + return (linux_semget(td, &a)); + } + case LINUX_SEMCTL: { + struct linux_semctl_args a; + int error; + + a.semid = args->arg1; + a.semnum = args->arg2; + a.cmd = args->arg3; + error = copyin(PTRIN(args->ptr), &a.arg, sizeof(a.arg)); + if (error) + return (error); + return (linux_semctl(td, &a)); + } + case LINUX_SEMTIMEDOP: { + struct linux_semtimedop_args a; + + a.semid = args->arg1; + a.tsops = PTRIN(args->ptr); + a.nsops = args->arg2; + a.timeout = PTRIN(args->arg5); + return (linux_semtimedop(td, &a)); + } + case LINUX_MSGSND: { + struct linux_msgsnd_args a; + + a.msqid = args->arg1; + a.msgp = PTRIN(args->ptr); + a.msgsz = args->arg2; + a.msgflg = args->arg3; + return (linux_msgsnd(td, &a)); + } + case LINUX_MSGRCV: { + struct linux_msgrcv_args a; + + a.msqid = args->arg1; + a.msgsz = args->arg2; + a.msgflg = args->arg3; + if ((args->what >> 16) == 0) { + struct l_ipc_kludge tmp; + int error; + + if (args->ptr == 0) + return (EINVAL); + error = copyin(PTRIN(args->ptr), &tmp, sizeof(tmp)); + if (error) + return (error); + a.msgp = PTRIN(tmp.msgp); + a.msgtyp = tmp.msgtyp; + } else { + a.msgp = PTRIN(args->ptr); + a.msgtyp = args->arg5; + } + return (linux_msgrcv(td, &a)); + } + case LINUX_MSGGET: { + struct linux_msgget_args a; + + a.key = args->arg1; + a.msgflg = args->arg2; + return (linux_msgget(td, &a)); + } + case LINUX_MSGCTL: { + struct linux_msgctl_args a; + + a.msqid = args->arg1; + a.cmd = args->arg2; + a.buf = PTRIN(args->ptr); + return (linux_msgctl(td, &a)); + } + case LINUX_SHMAT: { + struct linux_shmat_args a; + l_uintptr_t addr; + int error; + + a.shmid = args->arg1; + a.shmaddr = PTRIN(args->ptr); + a.shmflg = args->arg2; + error = linux_shmat(td, &a); + if (error != 0) + return (error); + addr = td->td_retval[0]; + error = copyout(&addr, PTRIN(args->arg3), sizeof(addr)); + td->td_retval[0] = 0; + return (error); + } + case LINUX_SHMDT: { + struct linux_shmdt_args a; + + a.shmaddr = PTRIN(args->ptr); + return (linux_shmdt(td, &a)); + } + case LINUX_SHMGET: { + struct linux_shmget_args a; + + a.key = args->arg1; + a.size = args->arg2; + a.shmflg = args->arg3; + return (linux_shmget(td, &a)); + } + case LINUX_SHMCTL: { + struct linux_shmctl_args a; + + a.shmid = args->arg1; + a.cmd = args->arg2; + a.buf = PTRIN(args->ptr); + return (linux_shmctl(td, &a)); + } + default: + break; + } + + return (EINVAL); +} + +int +linux_old_select(struct thread *td, struct linux_old_select_args *args) +{ + struct l_old_select_argv linux_args; + struct linux_select_args newsel; + int error; + + error = copyin(args->ptr, &linux_args, sizeof(linux_args)); + if (error) + return (error); + + newsel.nfds = linux_args.nfds; + newsel.readfds = PTRIN(linux_args.readfds); + newsel.writefds = PTRIN(linux_args.writefds); + newsel.exceptfds = PTRIN(linux_args.exceptfds); + newsel.timeout = PTRIN(linux_args.timeout); + return (linux_select(td, &newsel)); +} + +int +linux_set_cloned_tls(struct thread *td, void *desc) +{ + struct l_user_desc info; + struct pcb *pcb; + int error; + + error = copyin(desc, &info, sizeof(struct l_user_desc)); + if (error) { + linux_msg(td, "set_cloned_tls copyin info failed!"); + } else { + /* We might copy out the entry_number as GUGS32_SEL. */ + info.entry_number = GUGS32_SEL; + error = copyout(&info, desc, sizeof(struct l_user_desc)); + if (error) + linux_msg(td, "set_cloned_tls copyout info failed!"); + + pcb = td->td_pcb; + update_pcb_bases(pcb); + pcb->pcb_gsbase = (register_t)info.base_addr; + td->td_frame->tf_gs = GSEL(GUGS32_SEL, SEL_UPL); + } + + return (error); +} + +int +linux_set_upcall(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_mmap(struct thread *td, struct linux_mmap_args *args) +{ + int error; + struct l_mmap_argv linux_args; + + error = copyin(args->ptr, &linux_args, sizeof(linux_args)); + if (error) + return (error); + + return (linux_mmap_common(td, linux_args.addr, linux_args.len, + linux_args.prot, linux_args.flags, linux_args.fd, + (uint32_t)linux_args.pgoff)); +} + +int +linux_iopl(struct thread *td, struct linux_iopl_args *args) +{ + int error; + + if (args->level < 0 || 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_sigaction(struct thread *td, struct linux_sigaction_args *args) +{ + l_osigaction_t osa; + l_sigaction_t act, oact; + int error; + + if (args->nsa != NULL) { + error = copyin(args->nsa, &osa, sizeof(l_osigaction_t)); + if (error) + return (error); + act.lsa_handler = osa.lsa_handler; + act.lsa_flags = osa.lsa_flags; + act.lsa_restorer = osa.lsa_restorer; + LINUX_SIGEMPTYSET(act.lsa_mask); + act.lsa_mask.__mask = osa.lsa_mask; + } + + error = linux_do_sigaction(td, args->sig, args->nsa ? &act : NULL, + args->osa ? &oact : NULL); + + if (args->osa != NULL && !error) { + osa.lsa_handler = oact.lsa_handler; + osa.lsa_flags = oact.lsa_flags; + osa.lsa_restorer = oact.lsa_restorer; + osa.lsa_mask = oact.lsa_mask.__mask; + error = copyout(&osa, args->osa, sizeof(l_osigaction_t)); + } + + return (error); +} + +/* + * Linux has two extra args, restart and oldmask. We don't use these, + * but it seems that "restart" is actually a context pointer that + * enables the signal to happen with a different register set. + */ +int +linux_sigsuspend(struct thread *td, struct linux_sigsuspend_args *args) +{ + sigset_t sigmask; + l_sigset_t mask; + + LINUX_SIGEMPTYSET(mask); + mask.__mask = args->mask; + linux_to_bsd_sigset(&mask, &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; + + PROC_LOCK(p); + sigmask = td->td_sigmask; + PROC_UNLOCK(p); + return (kern_sigsuspend(td, sigmask)); +} + +int +linux_gettimeofday(struct thread *td, struct linux_gettimeofday_args *uap) +{ + struct timeval atv; + l_timeval atv32; + struct timezone rtz; + int error = 0; + + if (uap->tp) { + microtime(&atv); + atv32.tv_sec = atv.tv_sec; + atv32.tv_usec = atv.tv_usec; + error = copyout(&atv32, uap->tp, sizeof(atv32)); + } + if (error == 0 && uap->tzp != NULL) { + rtz.tz_minuteswest = 0; + rtz.tz_dsttime = 0; + error = copyout(&rtz, uap->tzp, sizeof(rtz)); + } + return (error); +} + +int +linux_settimeofday(struct thread *td, struct linux_settimeofday_args *uap) +{ + l_timeval atv32; + struct timeval atv, *tvp; + struct timezone atz, *tzp; + int error; + + if (uap->tp) { + error = copyin(uap->tp, &atv32, sizeof(atv32)); + if (error) + return (error); + atv.tv_sec = atv32.tv_sec; + atv.tv_usec = atv32.tv_usec; + tvp = &atv; + } else + tvp = NULL; + if (uap->tzp) { + error = copyin(uap->tzp, &atz, sizeof(atz)); + if (error) + return (error); + tzp = &atz; + } else + tzp = NULL; + return (kern_settimeofday(td, tvp, tzp)); +} + +int +linux_getrusage(struct thread *td, struct linux_getrusage_args *uap) +{ + struct rusage s; + int error; + + error = kern_getrusage(td, uap->who, &s); + if (error != 0) + return (error); + if (uap->rusage != NULL) + error = linux_copyout_rusage(&s, uap->rusage); + return (error); +} + +int +linux_set_thread_area(struct thread *td, + struct linux_set_thread_area_args *args) +{ + struct l_user_desc info; + struct pcb *pcb; + int error; + + error = copyin(args->desc, &info, sizeof(struct l_user_desc)); + if (error) + return (error); + + /* + * Semantics of Linux version: every thread in the system has array + * of three TLS descriptors. 1st is GLIBC TLS, 2nd is WINE, 3rd unknown. + * This syscall loads one of the selected TLS descriptors with a value + * and also loads GDT descriptors 6, 7 and 8 with the content of + * the per-thread descriptors. + * + * Semantics of FreeBSD version: I think we can ignore that Linux has + * three per-thread descriptors and use just the first one. + * The tls_array[] is used only in [gs]et_thread_area() syscalls and + * for loading the GDT descriptors. We use just one GDT descriptor + * for TLS, so we will load just one. + * + * XXX: This doesn't work when a user space process tries to use more + * than one TLS segment. Comment in the Linux source says wine might + * do this. + */ + + /* + * GLIBC reads current %gs and call set_thread_area() with it. + * We should let GUDATA_SEL and GUGS32_SEL proceed as well because + * we use these segments. + */ + switch (info.entry_number) { + case GUGS32_SEL: + case GUDATA_SEL: + case 6: + case -1: + info.entry_number = GUGS32_SEL; + break; + default: + return (EINVAL); + } + + /* + * We have to copy out the GDT entry we use. + * + * XXX: What if a user space program does not check the return value + * and tries to use 6, 7 or 8? + */ + error = copyout(&info, args->desc, sizeof(struct l_user_desc)); + if (error) + return (error); + + pcb = td->td_pcb; + update_pcb_bases(pcb); + pcb->pcb_gsbase = (register_t)info.base_addr; + update_gdt_gsbase(td, info.base_addr); + + return (0); +} + +void +bsd_to_linux_regset32(const struct reg32 *b_reg, + struct linux_pt_regset32 *l_regset) +{ + + l_regset->ebx = b_reg->r_ebx; + l_regset->ecx = b_reg->r_ecx; + l_regset->edx = b_reg->r_edx; + l_regset->esi = b_reg->r_esi; + l_regset->edi = b_reg->r_edi; + l_regset->ebp = b_reg->r_ebp; + l_regset->eax = b_reg->r_eax; + l_regset->ds = b_reg->r_ds; + l_regset->es = b_reg->r_es; + l_regset->fs = b_reg->r_fs; + l_regset->gs = b_reg->r_gs; + l_regset->orig_eax = b_reg->r_eax; + l_regset->eip = b_reg->r_eip; + l_regset->cs = b_reg->r_cs; + l_regset->eflags = b_reg->r_eflags; + l_regset->esp = b_reg->r_esp; + l_regset->ss = b_reg->r_ss; +} + +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); +} + +int +linux_ptrace_peekuser(struct thread *td, pid_t pid, void *addr, void *data) +{ + + LINUX_RATELIMIT_MSG_OPT1("PTRACE_PEEKUSER offset %ld not implemented; " + "returning EINVAL", (uintptr_t)addr); + return (EINVAL); +} + +int +linux_ptrace_pokeuser(struct thread *td, pid_t pid, void *addr, void *data) +{ + + LINUX_RATELIMIT_MSG_OPT1("PTRACE_POKEUSER offset %ld " + "not implemented; returning EINVAL", (uintptr_t)addr); + return (EINVAL); +} |