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/* mostly borrowed from kernel/signal.c */
#include <linux/config.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/unistd.h>
#include <linux/smp_lock.h>
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/types.h>
#include <asm/uaccess.h>
#include "sys32.h"
struct k_sigaction32 {
struct sigaction32 sa;
};
typedef unsigned int old_sigset_t32;
static int
put_old_sigset32(old_sigset_t32 *up, old_sigset_t *set)
{
old_sigset_t32 set32 = *set;
return put_user(set32, up);
}
static int
get_old_segset32(old_sigset_t32 *up, old_sigset_t *set)
{
old_sigset_t32 set32;
int r;
if ((r = get_user(set32, up)) == 0)
*set = set32;
return r;
}
long
sys32_sigpending(old_sigset_t32 *set)
{
extern long sys_sigpending(old_sigset_t *set);
old_sigset_t pending;
int ret;
KERNEL_SYSCALL(ret, sys_sigpending, &pending);
/* can't put_user an old_sigset_t -- it is too big */
if (put_old_sigset32(set, &pending))
return -EFAULT;
return ret;
}
int sys32_sigprocmask(int how, old_sigset_t32 *set,
old_sigset_t32 *oset)
{
extern int sys_sigprocmask(int how, old_sigset_t *set,
old_sigset_t *oset);
old_sigset_t s;
int ret;
if (set && get_old_segset32 (set, &s))
return -EFAULT;
KERNEL_SYSCALL(ret, sys_sigprocmask, how, set ? &s : NULL, oset ? &s : NULL);
if (!ret && oset && put_old_sigset32(oset, &s))
return -EFAULT;
return ret;
}
static inline void
sigset_32to64(sigset_t *s64, sigset_t32 *s32)
{
s64->sig[0] = s32->sig[0] | ((unsigned long)s32->sig[1] << 32);
}
static inline void
sigset_64to32(sigset_t32 *s32, sigset_t *s64)
{
s32->sig[0] = s64->sig[0] & 0xffffffffUL;
s32->sig[1] = (s64->sig[0] >> 32) & 0xffffffffUL;
}
static int
put_sigset32(sigset_t32 *up, sigset_t *set, size_t sz)
{
sigset_t32 s;
if (sz != sizeof *set) panic("put_sigset32()");
sigset_64to32(&s, set);
return copy_to_user(up, &s, sizeof s);
}
static int
get_sigset32(sigset_t32 *up, sigset_t *set, size_t sz)
{
sigset_t32 s;
int r;
if (sz != sizeof *set) panic("put_sigset32()");
if ((r = copy_from_user(&s, up, sz)) == 0) {
sigset_32to64(set, &s);
}
return r;
}
int sys32_rt_sigprocmask(int how, sigset_t32 *set, sigset_t32 *oset,
unsigned int sigsetsize)
{
extern long sys_rt_sigprocmask(int how,
sigset_t *set, sigset_t *oset,
size_t sigsetsize);
sigset_t old_set, new_set;
int ret;
if (set && get_sigset32(set, &new_set, sigsetsize))
return -EFAULT;
KERNEL_SYSCALL(ret, sys_rt_sigprocmask, how, set ? &new_set : NULL,
oset ? &old_set : NULL, sigsetsize);
if (!ret && oset && put_sigset32(oset, &old_set, sigsetsize))
return -EFAULT;
return ret;
}
int sys32_rt_sigpending(sigset_t32 *uset, unsigned int sigsetsize)
{
int ret;
sigset_t set;
extern long sys_rt_sigpending(sigset_t *set, size_t sigsetsize);
KERNEL_SYSCALL(ret, sys_rt_sigpending, &set, sigsetsize);
if (!ret && put_sigset32(uset, &set, sigsetsize))
return -EFAULT;
return ret;
}
long
sys32_rt_sigaction(int sig, const struct sigaction32 *act, struct sigaction32 *oact,
size_t sigsetsize)
{
struct k_sigaction32 new_sa32, old_sa32;
struct k_sigaction new_sa, old_sa;
int ret = -EINVAL;
if (act) {
if (copy_from_user(&new_sa32.sa, act, sizeof new_sa32.sa))
return -EFAULT;
new_sa.sa.sa_handler = (__sighandler_t)(unsigned long)new_sa32.sa.sa_handler;
new_sa.sa.sa_flags = new_sa32.sa.sa_flags;
sigset_32to64(&new_sa.sa.sa_mask, &new_sa32.sa.sa_mask);
}
ret = do_sigaction(sig, act ? &new_sa : NULL, oact ? &old_sa : NULL);
if (!ret && oact) {
sigset_64to32(&old_sa32.sa.sa_mask, &old_sa.sa.sa_mask);
old_sa32.sa.sa_flags = old_sa.sa.sa_flags;
old_sa32.sa.sa_handler = (__sighandler_t32)(unsigned long)old_sa.sa.sa_handler;
if (copy_to_user(oact, &old_sa32.sa, sizeof old_sa32.sa))
return -EFAULT;
}
return ret;
}
typedef struct {
unsigned int ss_sp;
int ss_flags;
__kernel_size_t32 ss_size;
} stack_t32;
int
do_sigaltstack32 (const stack_t32 *uss32, stack_t32 *uoss32, unsigned long sp)
{
stack_t32 ss32, oss32;
stack_t ss, oss;
stack_t *ssp = NULL, *ossp = NULL;
int ret;
if (uss32) {
if (copy_from_user(&ss32, uss32, sizeof ss32))
return -EFAULT;
ss.ss_sp = (void *)ss32.ss_sp;
ss.ss_flags = ss32.ss_flags;
ss.ss_size = ss32.ss_size;
ssp = &ss;
}
if (uoss32)
ossp = &oss;
KERNEL_SYSCALL(ret, do_sigaltstack, ssp, ossp, sp);
if (!ret && uoss32) {
oss32.ss_sp = (unsigned int)(unsigned long)oss.ss_sp;
oss32.ss_flags = oss.ss_flags;
oss32.ss_size = oss.ss_size;
if (copy_to_user(uoss32, &oss32, sizeof *uoss32))
return -EFAULT;
}
return ret;
}
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