/* $NetBSD: linux_machdep.c,v 1.166.2.1 2022/08/03 11:11:31 martin Exp $ */ /*- * Copyright (c) 1995, 2000, 2008, 2009 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Frank van der Linden, and by Andrew Doran. * * 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. * 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. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``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 FOUNDATION OR CONTRIBUTORS * 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 __KERNEL_RCSID(0, "$NetBSD: linux_machdep.c,v 1.166.2.1 2022/08/03 11:11:31 martin Exp $"); #if defined(_KERNEL_OPT) #include "opt_user_ldt.h" #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* * To see whether wscons is configured (for virtual console ioctl calls). */ #if defined(_KERNEL_OPT) #include "wsdisplay.h" #endif #if (NWSDISPLAY > 0) #include #include #if defined(_KERNEL_OPT) #include "opt_xserver.h" #endif #endif #ifdef DEBUG_LINUX #define DPRINTF(a) uprintf a #else #define DPRINTF(a) #endif extern struct disklist *x86_alldisks; static struct biosdisk_info *fd2biosinfo(struct proc *, struct file *); static void linux_save_ucontext(struct lwp *, struct trapframe *, const sigset_t *, struct sigaltstack *, struct linux_ucontext *); static void linux_save_sigcontext(struct lwp *, struct trapframe *, const sigset_t *, struct linux_sigcontext *); static int linux_restore_sigcontext(struct lwp *, struct linux_sigcontext *, register_t *); static void linux_rt_sendsig(const ksiginfo_t *, const sigset_t *); static void linux_old_sendsig(const ksiginfo_t *, const sigset_t *); extern char linux_sigcode[], linux_rt_sigcode[]; /* * Deal with some i386-specific things in the Linux emulation code. */ void linux_setregs(struct lwp *l, struct exec_package *epp, vaddr_t stack) { struct trapframe *tf; #ifdef USER_LDT pmap_ldt_cleanup(l); #endif fpu_clear(l, __Linux_NPXCW__); tf = l->l_md.md_regs; tf->tf_gs = 0; tf->tf_fs = GSEL(GUDATA_SEL, SEL_UPL); tf->tf_es = GSEL(GUDATA_SEL, SEL_UPL); tf->tf_ds = GSEL(GUDATA_SEL, SEL_UPL); tf->tf_edi = 0; tf->tf_esi = 0; tf->tf_ebp = 0; tf->tf_ebx = l->l_proc->p_psstrp; tf->tf_edx = 0; tf->tf_ecx = 0; tf->tf_eax = 0; tf->tf_eip = epp->ep_entry; tf->tf_cs = GSEL(GUCODEBIG_SEL, SEL_UPL); tf->tf_eflags = PSL_USERSET; tf->tf_esp = stack; tf->tf_ss = GSEL(GUDATA_SEL, SEL_UPL); } /* * Send an interrupt to process. * * Stack is set up to allow sigcode stored * in u. to call routine, followed by kcall * to sigreturn routine below. After sigreturn * resets the signal mask, the stack, and the * frame pointer, it returns to the user * specified pc, psl. */ void linux_sendsig(const ksiginfo_t *ksi, const sigset_t *mask) { if (SIGACTION(curproc, ksi->ksi_signo).sa_flags & SA_SIGINFO) linux_rt_sendsig(ksi, mask); else linux_old_sendsig(ksi, mask); } static void linux_save_ucontext(struct lwp *l, struct trapframe *tf, const sigset_t *mask, struct sigaltstack *sas, struct linux_ucontext *uc) { uc->uc_flags = 0; uc->uc_link = NULL; native_to_linux_sigaltstack(&uc->uc_stack, sas); linux_save_sigcontext(l, tf, mask, &uc->uc_mcontext); native_to_linux_sigset(&uc->uc_sigmask, mask); (void)memset(&uc->uc_fpregs_mem, 0, sizeof(uc->uc_fpregs_mem)); } static void linux_save_sigcontext(struct lwp *l, struct trapframe *tf, const sigset_t *mask, struct linux_sigcontext *sc) { struct pcb *pcb = lwp_getpcb(l); /* Save register context. */ sc->sc_gs = tf->tf_gs; sc->sc_fs = tf->tf_fs; sc->sc_es = tf->tf_es; sc->sc_ds = tf->tf_ds; sc->sc_eflags = tf->tf_eflags; sc->sc_edi = tf->tf_edi; sc->sc_esi = tf->tf_esi; sc->sc_esp = tf->tf_esp; sc->sc_ebp = tf->tf_ebp; sc->sc_ebx = tf->tf_ebx; sc->sc_edx = tf->tf_edx; sc->sc_ecx = tf->tf_ecx; sc->sc_eax = tf->tf_eax; sc->sc_eip = tf->tf_eip; sc->sc_cs = tf->tf_cs; sc->sc_esp_at_signal = tf->tf_esp; sc->sc_ss = tf->tf_ss; sc->sc_err = tf->tf_err; sc->sc_trapno = tf->tf_trapno; sc->sc_cr2 = pcb->pcb_cr2; sc->sc_387 = NULL; /* Save signal stack. */ /* Linux doesn't save the onstack flag in sigframe */ /* Save signal mask. */ native_to_linux_old_sigset(&sc->sc_mask, mask); } static void linux_rt_sendsig(const ksiginfo_t *ksi, const sigset_t *mask) { struct lwp *l = curlwp; struct proc *p = l->l_proc; struct trapframe *tf; struct linux_rt_sigframe *fp, frame; int onstack, error; int sig = ksi->ksi_signo; sig_t catcher = SIGACTION(p, sig).sa_handler; struct sigaltstack *sas = &l->l_sigstk; tf = l->l_md.md_regs; /* Do we need to jump onto the signal stack? */ onstack = (sas->ss_flags & (SS_DISABLE | SS_ONSTACK)) == 0 && (SIGACTION(p, sig).sa_flags & SA_ONSTACK) != 0; /* Allocate space for the signal handler context. */ if (onstack) fp = (struct linux_rt_sigframe *)((char *)sas->ss_sp + sas->ss_size); else fp = (struct linux_rt_sigframe *)tf->tf_esp; fp--; DPRINTF(("rt: onstack = %d, fp = %p sig = %d eip = 0x%x cr2 = 0x%x\n", onstack, fp, sig, tf->tf_eip, ((struct pcb *)lwp_getpcb(l))->pcb_cr2)); memset(&frame, 0, sizeof(frame)); /* Build stack frame for signal trampoline. */ frame.sf_handler = catcher; frame.sf_sig = native_to_linux_signo[sig]; frame.sf_sip = &fp->sf_si; frame.sf_ucp = &fp->sf_uc; /* * XXX: the following code assumes that the constants for * siginfo are the same between linux and NetBSD. */ native_to_linux_siginfo(&frame.sf_si, &ksi->ksi_info); /* Save register context. */ linux_save_ucontext(l, tf, mask, sas, &frame.sf_uc); sendsig_reset(l, sig); mutex_exit(p->p_lock); error = copyout(&frame, fp, sizeof(frame)); mutex_enter(p->p_lock); if (error != 0) { /* * Process has trashed its stack; give it an illegal * instruction to halt it in its tracks. */ sigexit(l, SIGILL); /* NOTREACHED */ } /* * Build context to run handler in. */ tf->tf_fs = GSEL(GUDATA_SEL, SEL_UPL); tf->tf_es = GSEL(GUDATA_SEL, SEL_UPL); tf->tf_ds = GSEL(GUDATA_SEL, SEL_UPL); tf->tf_eip = ((int)p->p_sigctx.ps_sigcode) + (linux_rt_sigcode - linux_sigcode); tf->tf_cs = GSEL(GUCODE_SEL, SEL_UPL); tf->tf_eflags &= ~PSL_CLEARSIG; tf->tf_esp = (int)fp; tf->tf_ss = GSEL(GUDATA_SEL, SEL_UPL); /* Remember that we're now on the signal stack. */ if (onstack) sas->ss_flags |= SS_ONSTACK; } static void linux_old_sendsig(const ksiginfo_t *ksi, const sigset_t *mask) { struct lwp *l = curlwp; struct proc *p = l->l_proc; struct trapframe *tf; struct linux_sigframe *fp, frame; int onstack, error; int sig = ksi->ksi_signo; sig_t catcher = SIGACTION(p, sig).sa_handler; struct sigaltstack *sas = &l->l_sigstk; tf = l->l_md.md_regs; /* Do we need to jump onto the signal stack? */ onstack = (sas->ss_flags & (SS_DISABLE | SS_ONSTACK)) == 0 && (SIGACTION(p, sig).sa_flags & SA_ONSTACK) != 0; /* Allocate space for the signal handler context. */ if (onstack) fp = (struct linux_sigframe *) ((char *)sas->ss_sp + sas->ss_size); else fp = (struct linux_sigframe *)tf->tf_esp; fp--; DPRINTF(("old: onstack = %d, fp = %p sig = %d eip = 0x%x cr2 = 0x%x\n", onstack, fp, sig, tf->tf_eip, ((struct pcb *)lwp_getpcb(l))->pcb_cr2)); memset(&frame, 0, sizeof(frame)); /* Build stack frame for signal trampoline. */ frame.sf_handler = catcher; frame.sf_sig = native_to_linux_signo[sig]; linux_save_sigcontext(l, tf, mask, &frame.sf_sc); sendsig_reset(l, sig); mutex_exit(p->p_lock); error = copyout(&frame, fp, sizeof(frame)); mutex_enter(p->p_lock); if (error != 0) { /* * Process has trashed its stack; give it an illegal * instruction to halt it in its tracks. */ sigexit(l, SIGILL); /* NOTREACHED */ } /* * Build context to run handler in. */ tf->tf_fs = GSEL(GUDATA_SEL, SEL_UPL); tf->tf_es = GSEL(GUDATA_SEL, SEL_UPL); tf->tf_ds = GSEL(GUDATA_SEL, SEL_UPL); tf->tf_eip = (int)p->p_sigctx.ps_sigcode; tf->tf_cs = GSEL(GUCODEBIG_SEL, SEL_UPL); tf->tf_eflags &= ~PSL_CLEARSIG; tf->tf_esp = (int)fp; tf->tf_ss = GSEL(GUDATA_SEL, SEL_UPL); /* Remember that we're now on the signal stack. */ if (onstack) sas->ss_flags |= SS_ONSTACK; } /* * System call to cleanup state after a signal * has been taken. Reset signal mask and * stack state from context left by sendsig (above). * Return to previous pc and psl as specified by * context left by sendsig. Check carefully to * make sure that the user has not modified the * psl to gain improper privileges or to cause * a machine fault. */ int linux_sys_rt_sigreturn(struct lwp *l, const struct linux_sys_rt_sigreturn_args *uap, register_t *retval) { /* { syscallarg(struct linux_ucontext *) ucp; } */ struct linux_ucontext context, *ucp = SCARG(uap, ucp); int error; /* * The trampoline code hands us the context. * It is unsafe to keep track of it ourselves, in the event that a * program jumps out of a signal handler. */ if ((error = copyin(ucp, &context, sizeof(*ucp))) != 0) return error; /* XXX XAX we can do better here by using more of the ucontext */ return linux_restore_sigcontext(l, &context.uc_mcontext, retval); } int linux_sys_sigreturn(struct lwp *l, const struct linux_sys_sigreturn_args *uap, register_t *retval) { /* { syscallarg(struct linux_sigcontext *) scp; } */ struct linux_sigcontext context, *scp = SCARG(uap, scp); int error; /* * The trampoline code hands us the context. * It is unsafe to keep track of it ourselves, in the event that a * program jumps out of a signal handler. */ if ((error = copyin((void *)scp, &context, sizeof(*scp))) != 0) return error; return linux_restore_sigcontext(l, &context, retval); } static int linux_restore_sigcontext(struct lwp *l, struct linux_sigcontext *scp, register_t *retval) { struct proc *p = l->l_proc; struct sigaltstack *sas = &l->l_sigstk; struct trapframe *tf; sigset_t mask; ssize_t ss_gap; /* Restore register context. */ tf = l->l_md.md_regs; DPRINTF(("sigreturn enter esp=0x%x eip=0x%x\n", tf->tf_esp, tf->tf_eip)); /* * Check for security violations. If we're returning to * protected mode, the CPU will validate the segment registers * automatically and generate a trap on violations. We handle * the trap, rather than doing all of the checking here. */ if (((scp->sc_eflags ^ tf->tf_eflags) & PSL_USERSTATIC) != 0 || !USERMODE(scp->sc_cs)) return EINVAL; tf->tf_gs = scp->sc_gs; tf->tf_fs = scp->sc_fs; tf->tf_es = scp->sc_es; tf->tf_ds = scp->sc_ds; tf->tf_eflags = scp->sc_eflags; tf->tf_edi = scp->sc_edi; tf->tf_esi = scp->sc_esi; tf->tf_ebp = scp->sc_ebp; tf->tf_ebx = scp->sc_ebx; tf->tf_edx = scp->sc_edx; tf->tf_ecx = scp->sc_ecx; tf->tf_eax = scp->sc_eax; tf->tf_eip = scp->sc_eip; tf->tf_cs = scp->sc_cs; tf->tf_esp = scp->sc_esp_at_signal; tf->tf_ss = scp->sc_ss; /* Restore signal stack. */ /* * Linux really does it this way; it doesn't have space in sigframe * to save the onstack flag. */ mutex_enter(p->p_lock); ss_gap = (ssize_t)((char *)scp->sc_esp_at_signal - (char *)sas->ss_sp); if (ss_gap >= 0 && ss_gap < sas->ss_size) sas->ss_flags |= SS_ONSTACK; else sas->ss_flags &= ~SS_ONSTACK; /* Restore signal mask. */ linux_old_to_native_sigset(&mask, &scp->sc_mask); (void) sigprocmask1(l, SIG_SETMASK, &mask, 0); mutex_exit(p->p_lock); DPRINTF(("sigreturn exit esp=0x%x eip=0x%x\n", tf->tf_esp, tf->tf_eip)); return EJUSTRETURN; } #ifdef USER_LDT static int linux_read_ldt(struct lwp *l, const struct linux_sys_modify_ldt_args *uap, register_t *retval) { struct x86_get_ldt_args gl; int error; union descriptor *ldt_buf; size_t sz; /* * I've checked the linux code - this function is asymetric with * linux_write_ldt, and returns raw ldt entries. * NB, the code I saw zerod the spare parts of the user buffer. */ DPRINTF(("linux_read_ldt!")); sz = 8192 * sizeof(*ldt_buf); ldt_buf = kmem_zalloc(sz, KM_SLEEP); gl.start = 0; gl.desc = NULL; gl.num = SCARG(uap, bytecount) / sizeof(union descriptor); error = x86_get_ldt1(l, &gl, ldt_buf); /* NB gl.num might have changed */ if (error == 0) { *retval = gl.num * sizeof(*ldtstore); error = copyout(ldt_buf, SCARG(uap, ptr), gl.num * sizeof *ldt_buf); } kmem_free(ldt_buf, sz); return error; } struct linux_ldt_info { u_int entry_number; u_long base_addr; u_int limit; u_int seg_32bit:1; u_int contents:2; u_int read_exec_only:1; u_int limit_in_pages:1; u_int seg_not_present:1; u_int useable:1; }; static int linux_write_ldt(struct lwp *l, const struct linux_sys_modify_ldt_args *uap, int oldmode) { struct linux_ldt_info ldt_info; union descriptor d; struct x86_set_ldt_args sl; int error; DPRINTF(("linux_write_ldt %d\n", oldmode)); if (SCARG(uap, bytecount) != sizeof(ldt_info)) return (EINVAL); if ((error = copyin(SCARG(uap, ptr), &ldt_info, sizeof(ldt_info))) != 0) return error; if (ldt_info.entry_number >= 8192) return (EINVAL); if (ldt_info.contents == 3) { if (oldmode) return (EINVAL); if (ldt_info.seg_not_present) return (EINVAL); } if (ldt_info.base_addr == 0 && ldt_info.limit == 0 && (oldmode || (ldt_info.contents == 0 && ldt_info.read_exec_only == 1 && ldt_info.seg_32bit == 0 && ldt_info.limit_in_pages == 0 && ldt_info.seg_not_present == 1 && ldt_info.useable == 0))) { /* this means you should zero the ldt */ (void)memset(&d, 0, sizeof(d)); } else { d.sd.sd_lobase = ldt_info.base_addr & 0xffffff; d.sd.sd_hibase = (ldt_info.base_addr >> 24) & 0xff; d.sd.sd_lolimit = ldt_info.limit & 0xffff; d.sd.sd_hilimit = (ldt_info.limit >> 16) & 0xf; d.sd.sd_type = 16 | (ldt_info.contents << 2) | (!ldt_info.read_exec_only << 1); d.sd.sd_dpl = SEL_UPL; d.sd.sd_p = !ldt_info.seg_not_present; d.sd.sd_def32 = ldt_info.seg_32bit; d.sd.sd_gran = ldt_info.limit_in_pages; if (!oldmode) d.sd.sd_xx = ldt_info.useable; else d.sd.sd_xx = 0; } sl.start = ldt_info.entry_number; sl.desc = NULL; sl.num = 1; DPRINTF(("linux_write_ldt: idx=%d, base=0x%lx, limit=0x%x\n", ldt_info.entry_number, ldt_info.base_addr, ldt_info.limit)); return x86_set_ldt1(l, &sl, &d); } #endif /* USER_LDT */ int linux_sys_modify_ldt(struct lwp *l, const struct linux_sys_modify_ldt_args *uap, register_t *retval) { /* { syscallarg(int) func; syscallarg(void *) ptr; syscallarg(size_t) bytecount; } */ switch (SCARG(uap, func)) { #ifdef USER_LDT case 0: return linux_read_ldt(l, (const void *)uap, retval); case 1: return linux_write_ldt(l, (const void *)uap, 1); case 2: #ifdef notyet return linux_read_default_ldt(l, (const void *)uap, retval); #else return (ENOSYS); #endif case 0x11: return linux_write_ldt(l, (const void *)uap, 0); #endif /* USER_LDT */ default: return (ENOSYS); } } /* * XXX Pathetic hack to make svgalib work. This will fake the major * device number of an opened VT so that svgalib likes it. grmbl. * Should probably do it 'wrong the right way' and use a mapping * array for all major device numbers, and map linux_mknod too. */ dev_t linux_fakedev(dev_t dev, int raw) { extern const struct cdevsw ptc_cdevsw, pts_cdevsw; const struct cdevsw *cd = cdevsw_lookup(dev); if (raw) { #if (NWSDISPLAY > 0) extern const struct cdevsw wsdisplay_cdevsw; if (cd == &wsdisplay_cdevsw) return makedev(LINUX_CONS_MAJOR, (minor(dev) + 1)); #endif } if (cd == &ptc_cdevsw) return makedev(LINUX_PTC_MAJOR, minor(dev)); if (cd == &pts_cdevsw) return makedev(LINUX_PTS_MAJOR, minor(dev)); return dev; } #if (NWSDISPLAY > 0) /* * That's not complete, but enough to get an X server running. */ #define NR_KEYS 128 static const u_short plain_map[NR_KEYS] = { 0x0200, 0x001b, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037, 0x0038, 0x0039, 0x0030, 0x002d, 0x003d, 0x007f, 0x0009, 0x0b71, 0x0b77, 0x0b65, 0x0b72, 0x0b74, 0x0b79, 0x0b75, 0x0b69, 0x0b6f, 0x0b70, 0x005b, 0x005d, 0x0201, 0x0702, 0x0b61, 0x0b73, 0x0b64, 0x0b66, 0x0b67, 0x0b68, 0x0b6a, 0x0b6b, 0x0b6c, 0x003b, 0x0027, 0x0060, 0x0700, 0x005c, 0x0b7a, 0x0b78, 0x0b63, 0x0b76, 0x0b62, 0x0b6e, 0x0b6d, 0x002c, 0x002e, 0x002f, 0x0700, 0x030c, 0x0703, 0x0020, 0x0207, 0x0100, 0x0101, 0x0102, 0x0103, 0x0104, 0x0105, 0x0106, 0x0107, 0x0108, 0x0109, 0x0208, 0x0209, 0x0307, 0x0308, 0x0309, 0x030b, 0x0304, 0x0305, 0x0306, 0x030a, 0x0301, 0x0302, 0x0303, 0x0300, 0x0310, 0x0206, 0x0200, 0x003c, 0x010a, 0x010b, 0x0200, 0x0200, 0x0200, 0x0200, 0x0200, 0x0200, 0x0200, 0x030e, 0x0702, 0x030d, 0x001c, 0x0701, 0x0205, 0x0114, 0x0603, 0x0118, 0x0601, 0x0602, 0x0117, 0x0600, 0x0119, 0x0115, 0x0116, 0x011a, 0x010c, 0x010d, 0x011b, 0x011c, 0x0110, 0x0311, 0x011d, 0x0200, 0x0200, 0x0200, 0x0200, 0x0200, 0x0200, 0x0200, 0x0200, }, shift_map[NR_KEYS] = { 0x0200, 0x001b, 0x0021, 0x0040, 0x0023, 0x0024, 0x0025, 0x005e, 0x0026, 0x002a, 0x0028, 0x0029, 0x005f, 0x002b, 0x007f, 0x0009, 0x0b51, 0x0b57, 0x0b45, 0x0b52, 0x0b54, 0x0b59, 0x0b55, 0x0b49, 0x0b4f, 0x0b50, 0x007b, 0x007d, 0x0201, 0x0702, 0x0b41, 0x0b53, 0x0b44, 0x0b46, 0x0b47, 0x0b48, 0x0b4a, 0x0b4b, 0x0b4c, 0x003a, 0x0022, 0x007e, 0x0700, 0x007c, 0x0b5a, 0x0b58, 0x0b43, 0x0b56, 0x0b42, 0x0b4e, 0x0b4d, 0x003c, 0x003e, 0x003f, 0x0700, 0x030c, 0x0703, 0x0020, 0x0207, 0x010a, 0x010b, 0x010c, 0x010d, 0x010e, 0x010f, 0x0110, 0x0111, 0x0112, 0x0113, 0x0213, 0x0203, 0x0307, 0x0308, 0x0309, 0x030b, 0x0304, 0x0305, 0x0306, 0x030a, 0x0301, 0x0302, 0x0303, 0x0300, 0x0310, 0x0206, 0x0200, 0x003e, 0x010a, 0x010b, 0x0200, 0x0200, 0x0200, 0x0200, 0x0200, 0x0200, 0x0200, 0x030e, 0x0702, 0x030d, 0x0200, 0x0701, 0x0205, 0x0114, 0x0603, 0x020b, 0x0601, 0x0602, 0x0117, 0x0600, 0x020a, 0x0115, 0x0116, 0x011a, 0x010c, 0x010d, 0x011b, 0x011c, 0x0110, 0x0311, 0x011d, 0x0200, 0x0200, 0x0200, 0x0200, 0x0200, 0x0200, 0x0200, 0x0200, }, altgr_map[NR_KEYS] = { 0x0200, 0x0200, 0x0200, 0x0040, 0x0200, 0x0024, 0x0200, 0x0200, 0x007b, 0x005b, 0x005d, 0x007d, 0x005c, 0x0200, 0x0200, 0x0200, 0x0b71, 0x0b77, 0x0918, 0x0b72, 0x0b74, 0x0b79, 0x0b75, 0x0b69, 0x0b6f, 0x0b70, 0x0200, 0x007e, 0x0201, 0x0702, 0x0914, 0x0b73, 0x0917, 0x0919, 0x0b67, 0x0b68, 0x0b6a, 0x0b6b, 0x0b6c, 0x0200, 0x0200, 0x0200, 0x0700, 0x0200, 0x0b7a, 0x0b78, 0x0916, 0x0b76, 0x0915, 0x0b6e, 0x0b6d, 0x0200, 0x0200, 0x0200, 0x0700, 0x030c, 0x0703, 0x0200, 0x0207, 0x050c, 0x050d, 0x050e, 0x050f, 0x0510, 0x0511, 0x0512, 0x0513, 0x0514, 0x0515, 0x0208, 0x0202, 0x0911, 0x0912, 0x0913, 0x030b, 0x090e, 0x090f, 0x0910, 0x030a, 0x090b, 0x090c, 0x090d, 0x090a, 0x0310, 0x0206, 0x0200, 0x007c, 0x0516, 0x0517, 0x0200, 0x0200, 0x0200, 0x0200, 0x0200, 0x0200, 0x0200, 0x030e, 0x0702, 0x030d, 0x0200, 0x0701, 0x0205, 0x0114, 0x0603, 0x0118, 0x0601, 0x0602, 0x0117, 0x0600, 0x0119, 0x0115, 0x0116, 0x011a, 0x010c, 0x010d, 0x011b, 0x011c, 0x0110, 0x0311, 0x011d, 0x0200, 0x0200, 0x0200, 0x0200, 0x0200, 0x0200, 0x0200, 0x0200, }, ctrl_map[NR_KEYS] = { 0x0200, 0x0200, 0x0200, 0x0000, 0x001b, 0x001c, 0x001d, 0x001e, 0x001f, 0x007f, 0x0200, 0x0200, 0x001f, 0x0200, 0x0008, 0x0200, 0x0011, 0x0017, 0x0005, 0x0012, 0x0014, 0x0019, 0x0015, 0x0009, 0x000f, 0x0010, 0x001b, 0x001d, 0x0201, 0x0702, 0x0001, 0x0013, 0x0004, 0x0006, 0x0007, 0x0008, 0x000a, 0x000b, 0x000c, 0x0200, 0x0007, 0x0000, 0x0700, 0x001c, 0x001a, 0x0018, 0x0003, 0x0016, 0x0002, 0x000e, 0x000d, 0x0200, 0x020e, 0x007f, 0x0700, 0x030c, 0x0703, 0x0000, 0x0207, 0x0100, 0x0101, 0x0102, 0x0103, 0x0104, 0x0105, 0x0106, 0x0107, 0x0108, 0x0109, 0x0208, 0x0204, 0x0307, 0x0308, 0x0309, 0x030b, 0x0304, 0x0305, 0x0306, 0x030a, 0x0301, 0x0302, 0x0303, 0x0300, 0x0310, 0x0206, 0x0200, 0x0200, 0x010a, 0x010b, 0x0200, 0x0200, 0x0200, 0x0200, 0x0200, 0x0200, 0x0200, 0x030e, 0x0702, 0x030d, 0x001c, 0x0701, 0x0205, 0x0114, 0x0603, 0x0118, 0x0601, 0x0602, 0x0117, 0x0600, 0x0119, 0x0115, 0x0116, 0x011a, 0x010c, 0x010d, 0x011b, 0x011c, 0x0110, 0x0311, 0x011d, 0x0200, 0x0200, 0x0200, 0x0200, 0x0200, 0x0200, 0x0200, 0x0200, }; const u_short * const linux_keytabs[] = { plain_map, shift_map, altgr_map, altgr_map, ctrl_map }; #endif static struct biosdisk_info * fd2biosinfo(struct proc *p, struct file *fp) { struct vnode *vp; const char *blkname; char diskname[16]; int i; struct nativedisk_info *nip; struct disklist *dl = x86_alldisks; if (dl == NULL) return NULL; if (fp->f_type != DTYPE_VNODE) return NULL; vp = (struct vnode *)fp->f_data; if (vp->v_type != VBLK) return NULL; blkname = devsw_blk2name(major(vp->v_rdev)); snprintf(diskname, sizeof diskname, "%s%llu", blkname, (unsigned long long)DISKUNIT(vp->v_rdev)); for (i = 0; i < dl->dl_nnativedisks; i++) { nip = &dl->dl_nativedisks[i]; if (strcmp(diskname, nip->ni_devname)) continue; if (nip->ni_nmatches != 0) return &dl->dl_biosdisks[nip->ni_biosmatches[0]]; } return NULL; } /* * We come here in a last attempt to satisfy a Linux ioctl() call */ int linux_machdepioctl(struct lwp *l, const struct linux_sys_ioctl_args *uap, register_t *retval) { /* { syscallarg(int) fd; syscallarg(u_long) com; syscallarg(void *) data; } */ struct sys_ioctl_args bia; u_long com; int error, error1; #if (NWSDISPLAY > 0) struct vt_mode lvt; struct kbentry kbe; #endif struct linux_hd_geometry hdg; struct linux_hd_big_geometry hdg_big; struct biosdisk_info *bip; file_t *fp; int fd; struct disklabel label; struct partinfo partp; int (*ioctlf)(struct file *, u_long, void *); u_long start, biostotal, realtotal; u_char heads, sectors; u_int cylinders; struct ioctl_pt pt; fd = SCARG(uap, fd); SCARG(&bia, fd) = fd; SCARG(&bia, data) = SCARG(uap, data); com = SCARG(uap, com); if ((fp = fd_getfile(fd)) == NULL) return (EBADF); switch (com) { #if (NWSDISPLAY > 0) case LINUX_KDGKBMODE: com = KDGKBMODE; break; case LINUX_KDSKBMODE: com = KDSKBMODE; if ((unsigned)SCARG(uap, data) == LINUX_K_MEDIUMRAW) SCARG(&bia, data) = (void *)K_RAW; break; case LINUX_KIOCSOUND: SCARG(&bia, data) = (void *)(((unsigned long)SCARG(&bia, data)) & 0xffff); /* fall through */ case LINUX_KDMKTONE: com = KDMKTONE; break; case LINUX_KDSETMODE: com = KDSETMODE; break; case LINUX_KDGETMODE: /* KD_* values are equal to the wscons numbers */ com = WSDISPLAYIO_GMODE; break; case LINUX_KDENABIO: com = KDENABIO; break; case LINUX_KDDISABIO: com = KDDISABIO; break; case LINUX_KDGETLED: com = KDGETLED; break; case LINUX_KDSETLED: com = KDSETLED; break; case LINUX_VT_OPENQRY: com = VT_OPENQRY; break; case LINUX_VT_GETMODE: memset(&lvt, 0, sizeof(lvt)); error = fp->f_ops->fo_ioctl(fp, VT_GETMODE, &lvt); if (error != 0) goto out; lvt.relsig = native_to_linux_signo[lvt.relsig]; lvt.acqsig = native_to_linux_signo[lvt.acqsig]; lvt.frsig = native_to_linux_signo[lvt.frsig]; error = copyout(&lvt, SCARG(uap, data), sizeof (lvt)); goto out; case LINUX_VT_SETMODE: error = copyin(SCARG(uap, data), &lvt, sizeof (lvt)); if (error != 0) goto out; lvt.relsig = linux_to_native_signo[lvt.relsig]; lvt.acqsig = linux_to_native_signo[lvt.acqsig]; lvt.frsig = linux_to_native_signo[lvt.frsig]; error = fp->f_ops->fo_ioctl(fp, VT_SETMODE, &lvt); goto out; case LINUX_VT_DISALLOCATE: /* XXX should use WSDISPLAYIO_DELSCREEN */ error = 0; goto out; case LINUX_VT_RELDISP: com = VT_RELDISP; break; case LINUX_VT_ACTIVATE: com = VT_ACTIVATE; break; case LINUX_VT_WAITACTIVE: com = VT_WAITACTIVE; break; case LINUX_VT_GETSTATE: com = VT_GETSTATE; break; case LINUX_KDGKBTYPE: { static const u_int8_t kb101 = KB_101; /* This is what Linux does. */ error = copyout(&kb101, SCARG(uap, data), 1); goto out; } case LINUX_KDGKBENT: /* * The Linux KDGKBENT ioctl is different from the * SYSV original. So we handle it in machdep code. * XXX We should use keyboard mapping information * from wsdisplay, but this would be expensive. */ if ((error = copyin(SCARG(uap, data), &kbe, sizeof(struct kbentry)))) goto out; if (kbe.kb_table >= sizeof(linux_keytabs) / sizeof(u_short *) || kbe.kb_index >= NR_KEYS) { error = EINVAL; goto out; } kbe.kb_value = linux_keytabs[kbe.kb_table][kbe.kb_index]; error = copyout(&kbe, SCARG(uap, data), sizeof(struct kbentry)); goto out; #endif case LINUX_HDIO_GETGEO: case LINUX_HDIO_GETGEO_BIG: /* * Try to mimic Linux behaviour: return the BIOS geometry * if possible (extending its # of cylinders if it's beyond * the 1023 limit), fall back to the MI geometry (i.e. * the real geometry) if not found, by returning an * error. See common/linux_hdio.c */ bip = fd2biosinfo(curproc, fp); ioctlf = fp->f_ops->fo_ioctl; error = ioctlf(fp, DIOCGDINFO, (void *)&label); error1 = ioctlf(fp, DIOCGPARTINFO, (void *)&partp); if (error != 0 && error1 != 0) { error = error1; goto out; } start = error1 != 0 ? partp.pi_offset : 0; if (bip != NULL && bip->bi_head != 0 && bip->bi_sec != 0 && bip->bi_cyl != 0) { heads = bip->bi_head; sectors = bip->bi_sec; cylinders = bip->bi_cyl; biostotal = heads * sectors * cylinders; realtotal = label.d_ntracks * label.d_nsectors * label.d_ncylinders; if (realtotal > biostotal) cylinders = realtotal / (heads * sectors); } else { heads = label.d_ntracks; cylinders = label.d_ncylinders; sectors = label.d_nsectors; } if (com == LINUX_HDIO_GETGEO) { memset(&hdg, 0, sizeof(hdg)); hdg.start = start; hdg.heads = heads; hdg.cylinders = cylinders; hdg.sectors = sectors; error = copyout(&hdg, SCARG(uap, data), sizeof hdg); goto out; } else { memset(&hdg_big, 0, sizeof(hdg_big)); hdg_big.start = start; hdg_big.heads = heads; hdg_big.cylinders = cylinders; hdg_big.sectors = sectors; error = copyout(&hdg_big, SCARG(uap, data), sizeof hdg_big); goto out; } default: /* * Unknown to us. If it's on a device, just pass it through * using PTIOCLINUX, the device itself might be able to * make some sense of it. * XXX hack: if the function returns EJUSTRETURN, * it has stuffed a sysctl return value in pt.data. */ ioctlf = fp->f_ops->fo_ioctl; pt.com = SCARG(uap, com); pt.data = SCARG(uap, data); error = ioctlf(fp, PTIOCLINUX, &pt); if (error == EJUSTRETURN) { retval[0] = (register_t)pt.data; error = 0; } if (error == ENOTTY) { DPRINTF(("linux_machdepioctl: invalid ioctl %08lx\n", com)); } goto out; } SCARG(&bia, com) = com; error = sys_ioctl(curlwp, &bia, retval); out: fd_putfile(fd); return error; } /* * Set I/O permissions for a process. Just set the maximum level * right away (ignoring the argument), otherwise we would have * to rely on I/O permission maps, which are not implemented. */ int linux_sys_iopl(struct lwp *l, const struct linux_sys_iopl_args *uap, register_t *retval) { /* { syscallarg(int) level; } */ struct trapframe *fp = l->l_md.md_regs; if (kauth_authorize_machdep(l->l_cred, KAUTH_MACHDEP_IOPL, NULL, NULL, NULL, NULL) != 0) return EPERM; fp->tf_eflags |= PSL_IOPL; *retval = 0; return 0; } /* * See above. If a root process tries to set access to an I/O port, * just let it have the whole range. */ int linux_sys_ioperm(struct lwp *l, const struct linux_sys_ioperm_args *uap, register_t *retval) { /* { syscallarg(unsigned int) lo; syscallarg(unsigned int) hi; syscallarg(int) val; } */ struct trapframe *fp = l->l_md.md_regs; if (kauth_authorize_machdep(l->l_cred, SCARG(uap, val) ? KAUTH_MACHDEP_IOPERM_SET : KAUTH_MACHDEP_IOPERM_GET, NULL, NULL, NULL, NULL) != 0) return EPERM; if (SCARG(uap, val)) fp->tf_eflags |= PSL_IOPL; *retval = 0; return 0; } int linux_usertrap(struct lwp *l, vaddr_t trapaddr, void *arg) { return 0; } const char * linux_get_uname_arch(void) { static char uname_arch[5] = "i386"; if (uname_arch[1] == '3') uname_arch[1] += cpu_class; return uname_arch; }