From 14dd2ec093cfabda3ae7efeeaf0e23c66ebaccc0 Mon Sep 17 00:00:00 2001
From: Ralf Baechle <ralf@linux-mips.org>
Date: Fri, 16 Jun 2000 23:00:36 +0000
Subject: Merge with 2.4.0-test1.

---
 arch/mips/kernel/signal.c | 37 ++++++++++++++++++++++++++++++++++++-
 arch/mips/mm/fault.c      | 25 +++++++++++++++----------
 2 files changed, 51 insertions(+), 11 deletions(-)

(limited to 'arch/mips')

diff --git a/arch/mips/kernel/signal.c b/arch/mips/kernel/signal.c
index 81ff3173d..c145b3343 100644
--- a/arch/mips/kernel/signal.c
+++ b/arch/mips/kernel/signal.c
@@ -39,6 +39,41 @@ extern asmlinkage int restore_fp_context(struct sigcontext *sc);
 
 extern asmlinkage void syscall_trace(void);
 
+int copy_siginfo_to_user(siginfo_t *to, siginfo_t *from)
+{
+	if (!access_ok (VERIFY_WRITE, to, sizeof(siginfo_t)))
+		return -EFAULT;
+	if (from->si_code < 0)
+		return __copy_to_user(to, from, sizeof(siginfo_t));
+	else {
+		int err;
+
+		/* If you change siginfo_t structure, please be sure
+		   this code is fixed accordingly.
+		   It should never copy any pad contained in the structure
+		   to avoid security leaks, but must copy the generic
+		   3 ints plus the relevant union member.  */
+		err = __put_user(from->si_signo, &to->si_signo);
+		err |= __put_user(from->si_errno, &to->si_errno);
+		err |= __put_user((short)from->si_code, &to->si_code);
+		/* First 32bits of unions are always present.  */
+		err |= __put_user(from->si_pid, &to->si_pid);
+		switch (from->si_code >> 16) {
+		case __SI_FAULT >> 16:
+			break;
+		case __SI_CHLD >> 16:
+			err |= __put_user(from->si_utime, &to->si_utime);
+			err |= __put_user(from->si_stime, &to->si_stime);
+			err |= __put_user(from->si_status, &to->si_status);
+		default:
+			err |= __put_user(from->si_uid, &to->si_uid);
+			break;
+		/* case __SI_RT: This is not generated by the kernel as of now.  */
+		}
+		return err;
+	}
+}
+
 /*
  * Atomically swap in the new signal mask, and wait for a signal.
  */
@@ -442,7 +477,7 @@ setup_rt_frame(struct k_sigaction * ka, struct pt_regs *regs,
 	}
 
 	/* Create siginfo.  */
-	err |= __copy_to_user(&frame->rs_info, info, sizeof(*info));
+	err |= copy_siginfo_to_user(&frame->rs_info, info);
 
 	/* Create the ucontext.  */
 	err |= __put_user(0, &frame->rs_uc.uc_flags);
diff --git a/arch/mips/mm/fault.c b/arch/mips/mm/fault.c
index e2d74fd11..6c9b46b82 100644
--- a/arch/mips/mm/fault.c
+++ b/arch/mips/mm/fault.c
@@ -1,10 +1,9 @@
-/* $Id: fault.c,v 1.15 2000/02/04 07:40:23 ralf Exp $
- *
+/*
  * This file is subject to the terms and conditions of the GNU General Public
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (C) 1995, 1996, 1997, 1998 by Ralf Baechle
+ * Copyright (C) 1995 - 2000 by Ralf Baechle
  */
 #include <linux/signal.h>
 #include <linux/sched.h>
@@ -47,9 +46,10 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long write,
 	struct vm_area_struct * vma;
 	struct task_struct *tsk = current;
 	struct mm_struct *mm = tsk->mm;
-	int si_code = SEGV_MAPERR;
 	unsigned long fixup;
+	siginfo_t info;
 
+	info.si_code = SEGV_MAPERR;
 	/*
 	 * If we're in an interrupt or have no user
 	 * context, we must not take the fault..
@@ -75,7 +75,7 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long write,
  * we can handle it..
  */
 good_area:
-	si_code = SEGV_ACCERR;
+	info.si_code = SEGV_ACCERR;
 
 	if (write) {
 		if (!(vma->vm_flags & VM_WRITE))
@@ -126,10 +126,11 @@ bad_area:
 		       (unsigned long) regs->cp0_epc,
 		       (unsigned long) regs->regs[31]);
 #endif
-		si.si_signo = SIGSEGV;
-		si.si_code = si_code;
-		si.si_addr = (void *) address;
-		force_sig_info(SIGSEGV, &si, tsk);
+		info.si_signo = SIGSEGV;
+		info.si_errno = 0;
+		/* info.si_code has been set above */
+		info.si_addr = (void *) address;
+		force_sig_info(SIGSEGV, &info, tsk);
 		return;
 	}
 
@@ -177,7 +178,11 @@ do_sigbus:
 	 * or user mode.
 	 */
 	tsk->thread.cp0_badvaddr = address;
-	force_sig(SIGBUS, tsk);
+	info.si_code = SIGBUS;
+	info.si_errno = 0;
+	info.si_code = BUS_ADRERR;
+	info.si_addr = (void *) address;
+	force_sig_info(SIGBUS, &info, tsk);
 
 	/* Kernel mode? Handle exceptions or die */
 	if (!user_mode(regs))
-- 
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