/*
* copied from amd64/amd64/machdep.c
*
* Send an interrupt to process.
*/
static void
linux_rt_sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask)
{
struct l_rt_sigframe sf, *sfp;
struct proc *p;
struct thread *td;
struct sigacts *psp;
caddr_t sp;
struct trapframe *regs;
int sig, code;
int oonstack;
td = curthread;
p = td->td_proc;
PROC_LOCK_ASSERT(p, MA_OWNED);
sig = ksi->ksi_signo;
psp = p->p_sigacts;
code = ksi->ksi_code;
mtx_assert(&psp->ps_mtx, MA_OWNED);
regs = td->td_frame;
oonstack = sigonstack(regs->tf_rsp);
LINUX_CTR4(rt_sendsig, "%p, %d, %p, %u",
catcher, sig, mask, code);
/* Allocate space for the signal handler context. */
if ((td->td_pflags & TDP_ALTSTACK) != 0 && !oonstack &&
SIGISMEMBER(psp->ps_sigonstack, sig)) {
sp = (caddr_t)td->td_sigstk.ss_sp + td->td_sigstk.ss_size -
sizeof(struct l_rt_sigframe);
} else
sp = (caddr_t)regs->tf_rsp - sizeof(struct l_rt_sigframe) - 128;
/* Align to 16 bytes. */
sfp = (struct l_rt_sigframe *)((unsigned long)sp & ~0xFul);
mtx_unlock(&psp->ps_mtx);
/* Translate the signal. */
sig = bsd_to_linux_signal(sig);
/* Save user context. */
bzero(&sf, sizeof(sf));
bsd_to_linux_sigset(mask, &sf.sf_sc.uc_sigmask);
bsd_to_linux_sigset(mask, &sf.sf_sc.uc_mcontext.sc_mask);
sf.sf_sc.uc_stack.ss_sp = PTROUT(td->td_sigstk.ss_sp);
sf.sf_sc.uc_stack.ss_size = td->td_sigstk.ss_size;
sf.sf_sc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK)
? ((oonstack) ? LINUX_SS_ONSTACK : 0) : LINUX_SS_DISABLE;
PROC_UNLOCK(p);
sf.sf_sc.uc_mcontext.sc_rdi = regs->tf_rdi;
sf.sf_sc.uc_mcontext.sc_rsi = regs->tf_rsi;
sf.sf_sc.uc_mcontext.sc_rdx = regs->tf_rdx;
sf.sf_sc.uc_mcontext.sc_rbp = regs->tf_rbp;
sf.sf_sc.uc_mcontext.sc_rbx = regs->tf_rbx;
sf.sf_sc.uc_mcontext.sc_rcx = regs->tf_rcx;
sf.sf_sc.uc_mcontext.sc_rax = regs->tf_rax;
sf.sf_sc.uc_mcontext.sc_rip = regs->tf_rip;
sf.sf_sc.uc_mcontext.sc_rsp = regs->tf_rsp;
sf.sf_sc.uc_mcontext.sc_r8 = regs->tf_r8;
sf.sf_sc.uc_mcontext.sc_r9 = regs->tf_r9;
sf.sf_sc.uc_mcontext.sc_r10 = regs->tf_r10;
sf.sf_sc.uc_mcontext.sc_r11 = regs->tf_r11;
sf.sf_sc.uc_mcontext.sc_r12 = regs->tf_r12;
sf.sf_sc.uc_mcontext.sc_r13 = regs->tf_r13;
sf.sf_sc.uc_mcontext.sc_r14 = regs->tf_r14;
sf.sf_sc.uc_mcontext.sc_r15 = regs->tf_r15;
sf.sf_sc.uc_mcontext.sc_cs = regs->tf_cs;
sf.sf_sc.uc_mcontext.sc_rflags = regs->tf_rflags;
sf.sf_sc.uc_mcontext.sc_err = regs->tf_err;
sf.sf_sc.uc_mcontext.sc_trapno = bsd_to_linux_trapcode(code);
sf.sf_sc.uc_mcontext.sc_cr2 = (register_t)ksi->ksi_addr;
/* Build the argument list for the signal handler. */
regs->tf_rdi = sig; /* arg 1 in %rdi */
regs->tf_rax = 0;
regs->tf_rsi = (register_t)&sfp->sf_si; /* arg 2 in %rsi */
regs->tf_rdx = (register_t)&sfp->sf_sc; /* arg 3 in %rdx */
sf.sf_handler = catcher;
/* Fill in POSIX parts */
ksiginfo_to_lsiginfo(ksi, &sf.sf_si, sig);
/*
* Copy the sigframe out to the user's stack.
*/
if (copyout(&sf, sfp, sizeof(*sfp)) != 0) {
#ifdef DEBUG
printf("process %ld has trashed its stack\n", (long)p->p_pid);
#endif
PROC_LOCK(p);
sigexit(td, SIGILL);
}
regs->tf_rsp = (long)sfp;
regs->tf_rip = linux_rt_sigcode;
regs->tf_rflags &= ~(PSL_T | PSL_D);
regs->tf_cs = _ucodesel;
set_pcb_flags(td->td_pcb, PCB_FULL_IRET);
PROC_LOCK(p);
mtx_lock(&psp->ps_mtx);
}
/*
* 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.
*/
static void
linux_sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask)
{
struct thread *td = curthread;
struct proc *p = td->td_proc;
struct sigacts *psp;
struct trapframe *regs;
struct l_sigframe *fp, frame;
l_sigset_t lmask;
int oonstack;
int sig, code;
sig = ksi->ksi_signo;
code = ksi->ksi_code;
PROC_LOCK_ASSERT(p, MA_OWNED);
psp = p->p_sigacts;
mtx_assert(&psp->ps_mtx, MA_OWNED);
if (SIGISMEMBER(psp->ps_siginfo, sig)) {
/* Signal handler installed with SA_SIGINFO. */
linux_rt_sendsig(catcher, ksi, mask);
return;
}
regs = td->td_frame;
oonstack = sigonstack(regs->tf_rsp);
#ifdef DEBUG
if (ldebug(sendsig))
printf(ARGS(sendsig, "%p, %d, %p, %u"),
catcher, sig, (void*)mask, code);
#endif
/*
* Allocate space for the signal handler context.
*/
if ((td->td_pflags & TDP_ALTSTACK) && !oonstack &&
SIGISMEMBER(psp->ps_sigonstack, sig)) {
fp = (struct l_sigframe *)(td->td_sigstk.ss_sp +
td->td_sigstk.ss_size - sizeof(struct l_sigframe));
} else
fp = (struct l_sigframe *)regs->tf_rsp - 1;
mtx_unlock(&psp->ps_mtx);
PROC_UNLOCK(p);
/*
* Build the argument list for the signal handler.
*/
sig = bsd_to_linux_signal(sig);
bzero(&frame, sizeof(frame));
frame.sf_handler = PTROUT(catcher);
frame.sf_sig = sig;
bsd_to_linux_sigset(mask, &lmask);
/*
* Build the signal context to be used by sigreturn.
*/
frame.sf_sc.sc_mask = lmask.__mask;
frame.sf_sc.sc_gs = regs->tf_gs;
frame.sf_sc.sc_fs = regs->tf_fs;
frame.sf_sc.sc_es = regs->tf_es;
frame.sf_sc.sc_ds = regs->tf_ds;
frame.sf_sc.sc_edi = regs->tf_rdi;
frame.sf_sc.sc_esi = regs->tf_rsi;
frame.sf_sc.sc_ebp = regs->tf_rbp;
frame.sf_sc.sc_ebx = regs->tf_rbx;
frame.sf_sc.sc_esp = regs->tf_rsp;
frame.sf_sc.sc_edx = regs->tf_rdx;
frame.sf_sc.sc_ecx = regs->tf_rcx;
frame.sf_sc.sc_eax = regs->tf_rax;
frame.sf_sc.sc_eip = regs->tf_rip;
frame.sf_sc.sc_cs = regs->tf_cs;
frame.sf_sc.sc_eflags = regs->tf_rflags;
frame.sf_sc.sc_esp_at_signal = regs->tf_rsp;
frame.sf_sc.sc_ss = regs->tf_ss;
frame.sf_sc.sc_err = regs->tf_err;
frame.sf_sc.sc_cr2 = (u_int32_t)(uintptr_t)ksi->ksi_addr;
frame.sf_sc.sc_trapno = bsd_to_linux_trapcode(code);
frame.sf_extramask[0] = lmask.__mask;
if (copyout(&frame, fp, sizeof(frame)) != 0) {
/*
* Process has trashed its stack; give it an illegal
* instruction to halt it in its tracks.
*/
PROC_LOCK(p);
sigexit(td, SIGILL);
}
/*
* Build context to run handler in.
*/
regs->tf_rsp = PTROUT(fp);
regs->tf_rip = linux32_sigcode;
regs->tf_rflags &= ~(PSL_T | PSL_D);
regs->tf_cs = _ucode32sel;
regs->tf_ss = _udatasel;
regs->tf_ds = _udatasel;
regs->tf_es = _udatasel;
regs->tf_fs = _ufssel;
regs->tf_gs = _ugssel;
regs->tf_flags = TF_HASSEGS;
set_pcb_flags(td->td_pcb, PCB_FULL_IRET);
PROC_LOCK(p);
mtx_lock(&psp->ps_mtx);
}
/*
* We come here in a last attempt to satisfy a Linux ioctl() call
*/
int
linux_machdepioctl(struct proc *p, void *v, register_t *retval)
{
struct linux_sys_ioctl_args /* {
syscallarg(int) fd;
syscallarg(u_long) com;
syscallarg(caddr_t) data;
} */ *uap = v;
struct sys_ioctl_args bia;
u_long com;
int error;
#if (NWSDISPLAY > 0 && defined(WSDISPLAY_COMPAT_USL))
struct vt_mode lvt;
caddr_t bvtp, sg;
#endif
struct filedesc *fdp;
struct file *fp;
int fd;
int (*ioctlf)(struct file *, u_long, caddr_t, struct proc *);
struct ioctl_pt pt;
fd = SCARG(uap, fd);
SCARG(&bia, fd) = SCARG(uap, fd);
SCARG(&bia, data) = SCARG(uap, data);
com = SCARG(uap, com);
fdp = p->p_fd;
if ((fp = fd_getfile(fdp, fd)) == NULL)
return (EBADF);
switch (com) {
#if (NWSDISPLAY > 0 && defined(WSDISPLAY_COMPAT_USL))
case LINUX_KDGKBMODE:
com = KDGKBMODE;
break;
case LINUX_KDSKBMODE:
com = KDSKBMODE;
if ((unsigned)SCARG(uap, data) == LINUX_K_MEDIUMRAW)
SCARG(&bia, data) = (caddr_t)K_RAW;
break;
case LINUX_KIOCSOUND:
SCARG(&bia, data) =
(caddr_t)(((unsigned long)SCARG(&bia, data)) & 0xffff);
/* FALLTHROUGH */
case LINUX_KDMKTONE:
com = KDMKTONE;
break;
case LINUX_KDSETMODE:
com = KDSETMODE;
break;
case LINUX_KDGETMODE:
#if NWSDISPLAY > 0 && defined(WSDISPLAY_COMPAT_USL)
com = WSDISPLAYIO_GMODE;
#else
com = KDGETMODE;
#endif
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: {
int sig;
SCARG(&bia, com) = VT_GETMODE;
if ((error = sys_ioctl(p, &bia, retval)))
return error;
if ((error = copyin(SCARG(uap, data), (caddr_t)&lvt,
sizeof (struct vt_mode))))
return error;
/* We need to bounds check here in case there
is a race with another thread */
if ((error = bsd_to_linux_signal(lvt.relsig, &sig)))
return error;
lvt.relsig = sig;
if ((error = bsd_to_linux_signal(lvt.acqsig, &sig)))
return error;
lvt.acqsig = sig;
if ((error = bsd_to_linux_signal(lvt.frsig, &sig)))
return error;
lvt.frsig = sig;
return copyout((caddr_t)&lvt, SCARG(uap, data),
sizeof (struct vt_mode));
}
case LINUX_VT_SETMODE: {
int sig;
com = VT_SETMODE;
if ((error = copyin(SCARG(uap, data), (caddr_t)&lvt,
sizeof (struct vt_mode))))
return error;
if ((error = linux_to_bsd_signal(lvt.relsig, &sig)))
return error;
lvt.relsig = sig;
if ((error = linux_to_bsd_signal(lvt.acqsig, &sig)))
return error;
lvt.acqsig = sig;
if ((error = linux_to_bsd_signal(lvt.frsig, &sig)))
return error;
lvt.frsig = sig;
sg = stackgap_init(p->p_emul);
bvtp = stackgap_alloc(&sg, sizeof (struct vt_mode));
if ((error = copyout(&lvt, bvtp, sizeof (struct vt_mode))))
return error;
SCARG(&bia, data) = bvtp;
break;
}
case LINUX_VT_DISALLOCATE:
/* XXX should use WSDISPLAYIO_DELSCREEN */
return 0;
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:
{
char tmp = KB_101;
/* This is what Linux does */
return copyout(&tmp, SCARG(uap, data), sizeof(char));
}
#endif
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.
*/
FREF(fp);
ioctlf = fp->f_ops->fo_ioctl;
pt.com = SCARG(uap, com);
pt.data = SCARG(uap, data);
error = ioctlf(fp, PTIOCLINUX, (caddr_t)&pt, p);
FRELE(fp);
if (error == EJUSTRETURN) {
retval[0] = (register_t)pt.data;
error = 0;
}
if (error == ENOTTY)
printf("linux_machdepioctl: invalid ioctl %08lx\n",
com);
return (error);
}
SCARG(&bia, com) = com;
return sys_ioctl(p, &bia, retval);
}
static void
linux_rt_sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask)
{
struct thread *td = curthread;
struct proc *p = td->td_proc;
struct sigacts *psp;
struct trapframe *regs;
struct l_rt_sigframe *fp, frame;
int oonstack;
int sig;
int code;
sig = ksi->ksi_signo;
code = ksi->ksi_code;
PROC_LOCK_ASSERT(p, MA_OWNED);
psp = p->p_sigacts;
mtx_assert(&psp->ps_mtx, MA_OWNED);
regs = td->td_frame;
oonstack = sigonstack(regs->tf_rsp);
#ifdef DEBUG
if (ldebug(rt_sendsig))
printf(ARGS(rt_sendsig, "%p, %d, %p, %u"),
catcher, sig, (void*)mask, code);
#endif
/*
* Allocate space for the signal handler context.
*/
if ((td->td_pflags & TDP_ALTSTACK) && !oonstack &&
SIGISMEMBER(psp->ps_sigonstack, sig)) {
fp = (struct l_rt_sigframe *)(td->td_sigstk.ss_sp +
td->td_sigstk.ss_size - sizeof(struct l_rt_sigframe));
} else
fp = (struct l_rt_sigframe *)regs->tf_rsp - 1;
mtx_unlock(&psp->ps_mtx);
/*
* Build the argument list for the signal handler.
*/
sig = bsd_to_linux_signal(sig);
bzero(&frame, sizeof(frame));
frame.sf_handler = PTROUT(catcher);
frame.sf_sig = sig;
frame.sf_siginfo = PTROUT(&fp->sf_si);
frame.sf_ucontext = PTROUT(&fp->sf_sc);
/* Fill in POSIX parts */
ksiginfo_to_lsiginfo(ksi, &frame.sf_si, sig);
/*
* Build the signal context to be used by sigreturn
* and libgcc unwind.
*/
frame.sf_sc.uc_flags = 0; /* XXX ??? */
frame.sf_sc.uc_link = 0; /* XXX ??? */
frame.sf_sc.uc_stack.ss_sp = PTROUT(td->td_sigstk.ss_sp);
frame.sf_sc.uc_stack.ss_size = td->td_sigstk.ss_size;
frame.sf_sc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK)
? ((oonstack) ? LINUX_SS_ONSTACK : 0) : LINUX_SS_DISABLE;
PROC_UNLOCK(p);
bsd_to_linux_sigset(mask, &frame.sf_sc.uc_sigmask);
frame.sf_sc.uc_mcontext.sc_mask = frame.sf_sc.uc_sigmask.__mask;
frame.sf_sc.uc_mcontext.sc_edi = regs->tf_rdi;
frame.sf_sc.uc_mcontext.sc_esi = regs->tf_rsi;
frame.sf_sc.uc_mcontext.sc_ebp = regs->tf_rbp;
frame.sf_sc.uc_mcontext.sc_ebx = regs->tf_rbx;
frame.sf_sc.uc_mcontext.sc_esp = regs->tf_rsp;
frame.sf_sc.uc_mcontext.sc_edx = regs->tf_rdx;
frame.sf_sc.uc_mcontext.sc_ecx = regs->tf_rcx;
frame.sf_sc.uc_mcontext.sc_eax = regs->tf_rax;
frame.sf_sc.uc_mcontext.sc_eip = regs->tf_rip;
frame.sf_sc.uc_mcontext.sc_cs = regs->tf_cs;
frame.sf_sc.uc_mcontext.sc_gs = regs->tf_gs;
frame.sf_sc.uc_mcontext.sc_fs = regs->tf_fs;
frame.sf_sc.uc_mcontext.sc_es = regs->tf_es;
frame.sf_sc.uc_mcontext.sc_ds = regs->tf_ds;
frame.sf_sc.uc_mcontext.sc_eflags = regs->tf_rflags;
frame.sf_sc.uc_mcontext.sc_esp_at_signal = regs->tf_rsp;
frame.sf_sc.uc_mcontext.sc_ss = regs->tf_ss;
frame.sf_sc.uc_mcontext.sc_err = regs->tf_err;
frame.sf_sc.uc_mcontext.sc_cr2 = (u_int32_t)(uintptr_t)ksi->ksi_addr;
frame.sf_sc.uc_mcontext.sc_trapno = bsd_to_linux_trapcode(code);
#ifdef DEBUG
if (ldebug(rt_sendsig))
printf(LMSG("rt_sendsig flags: 0x%x, sp: %p, ss: 0x%lx, mask: 0x%x"),
frame.sf_sc.uc_stack.ss_flags, td->td_sigstk.ss_sp,
td->td_sigstk.ss_size, frame.sf_sc.uc_mcontext.sc_mask);
#endif
if (copyout(&frame, fp, sizeof(frame)) != 0) {
/*
* Process has trashed its stack; give it an illegal
* instruction to halt it in its tracks.
*/
#ifdef DEBUG
if (ldebug(rt_sendsig))
printf(LMSG("rt_sendsig: bad stack %p, oonstack=%x"),
fp, oonstack);
#endif
PROC_LOCK(p);
sigexit(td, SIGILL);
}
/*
* Build context to run handler in.
*/
regs->tf_rsp = PTROUT(fp);
regs->tf_rip = linux32_rt_sigcode;
regs->tf_rflags &= ~(PSL_T | PSL_D);
regs->tf_cs = _ucode32sel;
regs->tf_ss = _udatasel;
regs->tf_ds = _udatasel;
regs->tf_es = _udatasel;
regs->tf_fs = _ufssel;
regs->tf_gs = _ugssel;
regs->tf_flags = TF_HASSEGS;
set_pcb_flags(td->td_pcb, PCB_FULL_IRET);
PROC_LOCK(p);
mtx_lock(&psp->ps_mtx);
}