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/* $Id: signal.c,v 1.7 2000/09/05 21:44:54 davem Exp $
* signal.c: Signal emulation for Solaris
*
* Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
*/
#include <linux/types.h>
#include <linux/smp_lock.h>
#include <asm/uaccess.h>
#include <asm/svr4.h>
#include <asm/string.h>
#include "conv.h"
#include "signal.h"
#define _S(nr) (1L<<((nr)-1))
#define _BLOCKABLE (~(_S(SIGKILL) | _S(SIGSTOP)))
long linux_to_solaris_signals[] = {
0,
SOLARIS_SIGHUP, SOLARIS_SIGINT,
SOLARIS_SIGQUIT, SOLARIS_SIGILL,
SOLARIS_SIGTRAP, SOLARIS_SIGIOT,
SOLARIS_SIGEMT, SOLARIS_SIGFPE,
SOLARIS_SIGKILL, SOLARIS_SIGBUS,
SOLARIS_SIGSEGV, SOLARIS_SIGSYS,
SOLARIS_SIGPIPE, SOLARIS_SIGALRM,
SOLARIS_SIGTERM, SOLARIS_SIGURG,
SOLARIS_SIGSTOP, SOLARIS_SIGTSTP,
SOLARIS_SIGCONT, SOLARIS_SIGCLD,
SOLARIS_SIGTTIN, SOLARIS_SIGTTOU,
SOLARIS_SIGPOLL, SOLARIS_SIGXCPU,
SOLARIS_SIGXFSZ, SOLARIS_SIGVTALRM,
SOLARIS_SIGPROF, SOLARIS_SIGWINCH,
SOLARIS_SIGUSR1, SOLARIS_SIGUSR1,
SOLARIS_SIGUSR2, -1,
};
long solaris_to_linux_signals[] = {
0,
SIGHUP, SIGINT, SIGQUIT, SIGILL,
SIGTRAP, SIGIOT, SIGEMT, SIGFPE,
SIGKILL, SIGBUS, SIGSEGV, SIGSYS,
SIGPIPE, SIGALRM, SIGTERM, SIGUSR1,
SIGUSR2, SIGCHLD, -1, SIGWINCH,
SIGURG, SIGPOLL, SIGSTOP, SIGTSTP,
SIGCONT, SIGTTIN, SIGTTOU, SIGVTALRM,
SIGPROF, SIGXCPU, SIGXFSZ, -1,
-1, -1, -1, -1,
-1, -1, -1, -1,
-1, -1, -1, -1,
};
static inline long mapsig(long sig)
{
if ((unsigned long)sig > SOLARIS_NSIGNALS)
return -EINVAL;
return solaris_to_linux_signals[sig];
}
asmlinkage int solaris_kill(int pid, int sig)
{
int (*sys_kill)(int,int) =
(int (*)(int,int))SYS(kill);
int s = mapsig(sig);
if (s < 0) return s;
return sys_kill(pid, s);
}
static long sig_handler(int sig, u32 arg, int one_shot)
{
struct sigaction sa, old;
int ret;
mm_segment_t old_fs = get_fs();
int (*sys_sigaction)(int,struct sigaction *,struct sigaction *) =
(int (*)(int,struct sigaction *,struct sigaction *))SYS(sigaction);
sigemptyset(&sa.sa_mask);
sa.sa_restorer = NULL;
sa.sa_handler = (__sighandler_t)A(arg);
sa.sa_flags = 0;
if (one_shot) sa.sa_flags = SA_ONESHOT | SA_NOMASK;
set_fs (KERNEL_DS);
ret = sys_sigaction(sig, &sa, &old);
set_fs (old_fs);
if (ret < 0) return ret;
return (u32)(long)old.sa_handler;
}
static inline long solaris_signal(int sig, u32 arg)
{
return sig_handler (sig, arg, 1);
}
static long solaris_sigset(int sig, u32 arg)
{
if (arg != 2) /* HOLD */ {
spin_lock_irq(¤t->sigmask_lock);
sigdelsetmask(¤t->blocked, _S(sig));
recalc_sigpending(current);
spin_unlock_irq(¤t->sigmask_lock);
return sig_handler (sig, arg, 0);
} else {
spin_lock_irq(¤t->sigmask_lock);
sigaddsetmask(¤t->blocked, (_S(sig) & ~_BLOCKABLE));
recalc_sigpending(current);
spin_unlock_irq(¤t->sigmask_lock);
return 0;
}
}
static inline long solaris_sighold(int sig)
{
return solaris_sigset(sig, 2);
}
static inline long solaris_sigrelse(int sig)
{
spin_lock_irq(¤t->sigmask_lock);
sigdelsetmask(¤t->blocked, _S(sig));
recalc_sigpending(current);
spin_unlock_irq(¤t->sigmask_lock);
return 0;
}
static inline long solaris_sigignore(int sig)
{
return sig_handler (sig, (u32)SIG_IGN, 0);
}
static inline long solaris_sigpause(int sig)
{
printk ("Need to support solaris sigpause\n");
return -ENOSYS;
}
asmlinkage long solaris_sigfunc(int sig, u32 arg)
{
int func = sig & ~0xff;
sig = mapsig(sig & 0xff);
if (sig < 0) return sig;
switch (func) {
case 0: return solaris_signal(sig, arg);
case 0x100: return solaris_sigset(sig, arg);
case 0x200: return solaris_sighold(sig);
case 0x400: return solaris_sigrelse(sig);
case 0x800: return solaris_sigignore(sig);
case 0x1000: return solaris_sigpause(sig);
}
return -EINVAL;
}
typedef struct {
u32 __sigbits[4];
} sol_sigset_t;
static inline int mapin(u32 *p, sigset_t *q)
{
int i;
u32 x;
int sig;
sigemptyset(q);
x = p[0];
for (i = 1; i <= SOLARIS_NSIGNALS; i++) {
if (x & 1) {
sig = solaris_to_linux_signals[i];
if (sig == -1)
return -EINVAL;
sigaddsetmask(q, (1L << (sig - 1)));
}
x >>= 1;
if (i == 32)
x = p[1];
}
return 0;
}
static inline int mapout(sigset_t *q, u32 *p)
{
int i;
int sig;
p[0] = 0;
p[1] = 0;
for (i = 1; i <= 32; i++) {
if (sigismember(q, sigmask(i))) {
sig = linux_to_solaris_signals[i];
if (sig == -1)
return -EINVAL;
if (sig > 32)
p[1] |= 1L << (sig - 33);
else
p[0] |= 1L << (sig - 1);
}
}
return 0;
}
asmlinkage int solaris_sigprocmask(int how, u32 in, u32 out)
{
sigset_t in_s, *ins, out_s, *outs;
mm_segment_t old_fs = get_fs();
int ret;
int (*sys_sigprocmask)(int,sigset_t *,sigset_t *) =
(int (*)(int,sigset_t *,sigset_t *))SYS(sigprocmask);
ins = NULL; outs = NULL;
if (in) {
u32 tmp[2];
if (copy_from_user (tmp, (sol_sigset_t *)A(in), 2*sizeof(u32)))
return -EFAULT;
ins = &in_s;
if (mapin (tmp, ins)) return -EINVAL;
}
if (out) outs = &out_s;
set_fs (KERNEL_DS);
ret = sys_sigprocmask((how == 3) ? SIG_SETMASK : how, ins, outs);
set_fs (old_fs);
if (ret) return ret;
if (out) {
u32 tmp[4];
tmp[2] = 0; tmp[3] = 0;
if (mapout (outs, tmp)) return -EINVAL;
if (copy_to_user((sol_sigset_t *)A(out), tmp, 4*sizeof(u32)))
return -EFAULT;
}
return 0;
}
asmlinkage long do_sol_sigsuspend(u32 mask)
{
sigset_t s;
u32 tmp[2];
if (copy_from_user (tmp, (sol_sigset_t *)A(mask), 2*sizeof(u32)))
return -EFAULT;
if (mapin (tmp, &s)) return -EINVAL;
return (long)s.sig[0];
}
struct sol_sigaction {
int sa_flags;
u32 sa_handler;
u32 sa_mask[4];
int sa_resv[2];
};
asmlinkage int solaris_sigaction(int sig, u32 act, u32 old)
{
u32 tmp, tmp2[4];
struct sigaction s, s2;
int ret;
mm_segment_t old_fs = get_fs();
int (*sys_sigaction)(int,struct sigaction *,struct sigaction *) =
(int (*)(int,struct sigaction *,struct sigaction *))SYS(sigaction);
sig = mapsig(sig);
if (sig < 0) {
/* We cheat a little bit for Solaris only signals */
if (old && clear_user((struct sol_sigaction *)A(old), sizeof(struct sol_sigaction)))
return -EFAULT;
return 0;
}
if (act) {
if (get_user (tmp, &((struct sol_sigaction *)A(act))->sa_flags))
return -EFAULT;
s.sa_flags = 0;
if (tmp & SOLARIS_SA_ONSTACK) s.sa_flags |= SA_STACK;
if (tmp & SOLARIS_SA_RESTART) s.sa_flags |= SA_RESTART;
if (tmp & SOLARIS_SA_NODEFER) s.sa_flags |= SA_NOMASK;
if (tmp & SOLARIS_SA_RESETHAND) s.sa_flags |= SA_ONESHOT;
if (tmp & SOLARIS_SA_NOCLDSTOP) s.sa_flags |= SA_NOCLDSTOP;
if (get_user (tmp, &((struct sol_sigaction *)A(act))->sa_handler) ||
copy_from_user (tmp2, &((struct sol_sigaction *)A(act))->sa_mask, 2*sizeof(u32)))
return -EFAULT;
s.sa_handler = (__sighandler_t)A(tmp);
if (mapin (tmp2, &s.sa_mask)) return -EINVAL;
s.sa_restorer = 0;
}
set_fs(KERNEL_DS);
ret = sys_sigaction(sig, act ? &s : NULL, old ? &s2 : NULL);
set_fs(old_fs);
if (ret) return ret;
if (old) {
if (mapout (&s2.sa_mask, tmp2)) return -EINVAL;
tmp = 0; tmp2[2] = 0; tmp2[3] = 0;
if (s2.sa_flags & SA_STACK) tmp |= SOLARIS_SA_ONSTACK;
if (s2.sa_flags & SA_RESTART) tmp |= SOLARIS_SA_RESTART;
if (s2.sa_flags & SA_NOMASK) tmp |= SOLARIS_SA_NODEFER;
if (s2.sa_flags & SA_ONESHOT) tmp |= SOLARIS_SA_RESETHAND;
if (s2.sa_flags & SA_NOCLDSTOP) tmp |= SOLARIS_SA_NOCLDSTOP;
if (put_user (tmp, &((struct sol_sigaction *)A(old))->sa_flags) ||
__put_user ((u32)(long)s2.sa_handler, &((struct sol_sigaction *)A(old))->sa_handler) ||
copy_to_user (&((struct sol_sigaction *)A(old))->sa_mask, tmp2, 4*sizeof(u32)))
return -EFAULT;
}
return 0;
}
asmlinkage int solaris_sigpending(int which, u32 set)
{
sigset_t s;
u32 tmp[4];
switch (which) {
case 1: /* sigpending */
spin_lock_irq(¤t->sigmask_lock);
sigandsets(&s, ¤t->blocked, ¤t->pending.signal);
recalc_sigpending(current);
spin_unlock_irq(¤t->sigmask_lock);
break;
case 2: /* sigfillset - I just set signals which have linux equivalents */
sigfillset(&s);
break;
default: return -EINVAL;
}
if (mapout (&s, tmp)) return -EINVAL;
tmp[2] = 0; tmp[3] = 0;
if (copy_to_user ((u32 *)A(set), tmp, sizeof(tmp)))
return -EFAULT;
return 0;
}
asmlinkage int solaris_wait(u32 stat_loc)
{
int (*sys_wait4)(pid_t,unsigned int *, int, struct rusage *) =
(int (*)(pid_t,unsigned int *, int, struct rusage *))SYS(wait4);
int ret, status;
ret = sys_wait4(-1, (unsigned int *)A(stat_loc), WUNTRACED, NULL);
if (ret >= 0 && stat_loc) {
if (get_user (status, (unsigned int *)A(stat_loc)))
return -EFAULT;
if (((status - 1) & 0xffff) < 0xff)
status = linux_to_solaris_signals[status & 0x7f] & 0x7f;
else if ((status & 0xff) == 0x7f)
status = (linux_to_solaris_signals[(status >> 8) & 0xff] << 8) | 0x7f;
if (__put_user (status, (unsigned int *)A(stat_loc)))
return -EFAULT;
}
return ret;
}
asmlinkage int solaris_waitid(int idtype, s32 pid, u32 info, int options)
{
int (*sys_wait4)(pid_t,unsigned int *, int, struct rusage *) =
(int (*)(pid_t,unsigned int *, int, struct rusage *))SYS(wait4);
int opts, status, ret;
switch (idtype) {
case 0: /* P_PID */ break;
case 1: /* P_PGID */ pid = -pid; break;
case 7: /* P_ALL */ pid = -1; break;
default: return -EINVAL;
}
opts = 0;
if (options & SOLARIS_WUNTRACED) opts |= WUNTRACED;
if (options & SOLARIS_WNOHANG) opts |= WNOHANG;
current->state = TASK_RUNNING;
ret = sys_wait4(pid, (unsigned int *)A(info), opts, NULL);
if (ret < 0) return ret;
if (info) {
struct sol_siginfo *s = (struct sol_siginfo *)A(info);
if (get_user (status, (unsigned int *)A(info)))
return -EFAULT;
if (__put_user (SOLARIS_SIGCLD, &s->si_signo) ||
__put_user (ret, &s->_data._proc._pid))
return -EFAULT;
switch (status & 0xff) {
case 0: ret = SOLARIS_CLD_EXITED;
status = (status >> 8) & 0xff;
break;
case 0x7f:
status = (status >> 8) & 0xff;
switch (status) {
case SIGSTOP:
case SIGTSTP: ret = SOLARIS_CLD_STOPPED;
default: ret = SOLARIS_CLD_EXITED;
}
status = linux_to_solaris_signals[status];
break;
default:
if (status & 0x80) ret = SOLARIS_CLD_DUMPED;
else ret = SOLARIS_CLD_KILLED;
status = linux_to_solaris_signals[status & 0x7f];
break;
}
if (__put_user (ret, &s->si_code) ||
__put_user (status, &s->_data._proc._pdata._cld._status))
return -EFAULT;
}
return 0;
}
extern int svr4_setcontext(svr4_ucontext_t *c, struct pt_regs *regs);
extern int svr4_getcontext(svr4_ucontext_t *c, struct pt_regs *regs);
asmlinkage int solaris_context(struct pt_regs *regs)
{
switch ((unsigned)regs->u_regs[UREG_I0]) {
case 0: /* getcontext */
return svr4_getcontext((svr4_ucontext_t *)(long)(u32)regs->u_regs[UREG_I1], regs);
case 1: /* setcontext */
return svr4_setcontext((svr4_ucontext_t *)(long)(u32)regs->u_regs[UREG_I1], regs);
default:
return -EINVAL;
}
}
asmlinkage int solaris_sigaltstack(u32 ss, u32 oss)
{
/* XXX Implement this soon */
return 0;
}
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