X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;ds=sidebyside;f=arch%2Fs390%2Fkernel%2Fcompat_signal.c;h=e8c8b2fe7af5789b436b47d5990984b71c5cdc6c;hb=9bf4aaab3e101692164d49b7ca357651eb691cb6;hp=67134eee72fc5511155d8d0d28b0d96fda72fb81;hpb=db216c3d5e4c040e557a50f8f5d35d5c415e8c1c;p=linux-2.6.git

diff --git a/arch/s390/kernel/compat_signal.c b/arch/s390/kernel/compat_signal.c
index 67134eee7..e8c8b2fe7 100644
--- a/arch/s390/kernel/compat_signal.c
+++ b/arch/s390/kernel/compat_signal.c
@@ -40,6 +40,7 @@ typedef struct
 	__u8 callee_used_stack[__SIGNAL_FRAMESIZE32];
 	struct sigcontext32 sc;
 	_sigregs32 sregs;
+	int signo;
 	__u8 retcode[S390_SYSCALL_SIZE];
 } sigframe32;
 
@@ -105,6 +106,53 @@ int copy_siginfo_to_user32(siginfo_t32 __user *to, siginfo_t *from)
 	return err;
 }
 
+int copy_siginfo_from_user32(siginfo_t *to, siginfo_t32 __user *from)
+{
+	int err;
+	u32 tmp;
+
+	if (!access_ok (VERIFY_READ, from, sizeof(siginfo_t32)))
+		return -EFAULT;
+
+	err = __get_user(to->si_signo, &from->si_signo);
+	err |= __get_user(to->si_errno, &from->si_errno);
+	err |= __get_user(to->si_code, &from->si_code);
+
+	if (from->si_code < 0)
+		err |= __copy_from_user(&to->_sifields._pad, &from->_sifields._pad, SI_PAD_SIZE);
+	else {
+		switch (from->si_code >> 16) {
+		case __SI_RT >> 16: /* This is not generated by the kernel as of now.  */
+		case __SI_MESGQ >> 16:
+			err |= __get_user(to->si_int, &from->si_int);
+			/* fallthrough */
+		case __SI_KILL >> 16:
+			err |= __get_user(to->si_pid, &from->si_pid);
+			err |= __get_user(to->si_uid, &from->si_uid);
+			break;
+		case __SI_CHLD >> 16:
+			err |= __get_user(to->si_pid, &from->si_pid);
+			err |= __get_user(to->si_uid, &from->si_uid);
+			err |= __get_user(to->si_utime, &from->si_utime);
+			err |= __get_user(to->si_stime, &from->si_stime);
+			err |= __get_user(to->si_status, &from->si_status);
+			break;
+		case __SI_FAULT >> 16:
+			err |= __get_user(tmp, &from->si_addr);
+			to->si_addr = (void *)(u64) (tmp & PSW32_ADDR_INSN);
+			break;
+		case __SI_POLL >> 16:
+		case __SI_TIMER >> 16:
+			err |= __get_user(to->si_band, &from->si_band);
+			err |= __get_user(to->si_fd, &from->si_fd);
+			break;
+		default:
+			break;
+		}
+	}
+	return err;
+}
+
 /*
  * Atomically swap in the new signal mask, and wait for a signal.
  */
@@ -497,6 +545,10 @@ static void setup_frame32(int sig, struct k_sigaction *ka,
 	   To avoid breaking binary compatibility, they are passed as args. */
 	regs->gprs[4] = current->thread.trap_no;
 	regs->gprs[5] = current->thread.prot_addr;
+
+	/* Place signal number on stack to allow backtrace from handler.  */
+	if (__put_user(regs->gprs[2], (int __user *) &frame->signo))
+		goto give_sigsegv;
 	return;
 
 give_sigsegv: