patch-2.4.20 linux-2.4.20/arch/parisc/kernel/signal32.c

• Lines: 214
• Date: Thu Nov 28 15:53:10 2002
• Orig file: linux-2.4.19/arch/parisc/kernel/signal32.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.19/arch/parisc/kernel/signal32.c linux-2.4.20/arch/parisc/kernel/signal32.c
@@ -0,0 +1,213 @@
+/* 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;
+}