---

yaml --- r: 356717 b: refs/heads/master c: faec5a9 h: refs/heads/master i: 356715: b8ec07c v: v3
git-mirror · Feb 3, 2013 · 1e39ebe · 1e39ebe
1 parent 50b2160
commit 1e39ebe
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Showing 7 changed files with 69 additions and 23 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 33f9f78eec7e332dac6bee9cf66cd2bd435b7419
+refs/heads/master: faec5a96a024c1256b289253f3609b4a5f6f3576
diff --git a/trunk/arch/mn10300/Kconfig b/trunk/arch/mn10300/Kconfig
@@ -10,9 +10,6 @@ config MN10300
 	select HAVE_NMI_WATCHDOG if MN10300_WD_TIMER
 	select GENERIC_CLOCKEVENTS
 	select MODULES_USE_ELF_RELA
-	select GENERIC_SIGALTSTACK
-	select OLD_SIGSUSPEND3
-	select OLD_SIGACTION
 
 config AM33_2
 	def_bool n

diff --git a/trunk/arch/mn10300/include/asm/signal.h b/trunk/arch/mn10300/include/asm/signal.h
@@ -26,6 +26,13 @@ typedef struct {
 	unsigned long	sig[_NSIG_WORDS];
 } sigset_t;
 
+struct old_sigaction {
+	__sighandler_t sa_handler;
+	old_sigset_t sa_mask;
+	unsigned long sa_flags;
+	__sigrestore_t sa_restorer;
+};
+
 #define __ARCH_HAS_SA_RESTORER
 
 #include <asm/sigcontext.h>

diff --git a/trunk/arch/mn10300/kernel/signal.c b/trunk/arch/mn10300/kernel/signal.c
@@ -31,6 +31,59 @@
 
 #define DEBUG_SIG 0
 
+/*
+ * atomically swap in the new signal mask, and wait for a signal.
+ */
+asmlinkage long sys_sigsuspend(int history0, int history1, old_sigset_t mask)
+{
+	sigset_t blocked;
+	siginitset(&blocked, mask);
+	return sigsuspend(&blocked);
+}
+
+/*
+ * set signal action syscall
+ */
+asmlinkage long sys_sigaction(int sig,
+			      const struct old_sigaction __user *act,
+			      struct old_sigaction __user *oact)
+{
+	struct k_sigaction new_ka, old_ka;
+	int ret;
+
+	if (act) {
+		old_sigset_t mask;
+		if (verify_area(VERIFY_READ, act, sizeof(*act)) ||
+		    __get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
+		    __get_user(new_ka.sa.sa_restorer, &act->sa_restorer) ||
+		    __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
+		    __get_user(mask, &act->sa_mask))
+			return -EFAULT;
+		siginitset(&new_ka.sa.sa_mask, mask);
+	}
+
+	ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
+
+	if (!ret && oact) {
+		if (verify_area(VERIFY_WRITE, oact, sizeof(*oact)) ||
+		    __put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
+		    __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer) ||
+		    __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
+		    __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
+			return -EFAULT;
+	}
+
+	return ret;
+}
+
+/*
+ * set alternate signal stack syscall
+ */
+asmlinkage long sys_sigaltstack(const stack_t __user *uss, stack_t *uoss)
+{
+	return do_sigaltstack(uss, uoss, current_frame()->sp);
+}
+
 /*
  * do a signal return; undo the signal stack.
  */
@@ -140,7 +193,8 @@ asmlinkage long sys_rt_sigreturn(void)
 	if (restore_sigcontext(current_frame(), &frame->uc.uc_mcontext, &d0))
 		goto badframe;
 
-	if (restore_altstack(&frame->uc.uc_stack))
+	if (do_sigaltstack(&frame->uc.uc_stack, NULL, current_frame()->sp) ==
+	    -EFAULT)
 		goto badframe;
 
 	return d0;
@@ -305,7 +359,9 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 	/* create the ucontext.  */
 	if (__put_user(0, &frame->uc.uc_flags) ||
 	    __put_user(0, &frame->uc.uc_link) ||
-	    __save_altstack(&frame->uc.uc_stack, regs->sp) ||
+	    __put_user((void *)current->sas_ss_sp, &frame->uc.uc_stack.ss_sp) ||
+	    __put_user(sas_ss_flags(regs->sp), &frame->uc.uc_stack.ss_flags) ||
+	    __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size) ||
 	    setup_sigcontext(&frame->uc.uc_mcontext,
 			     &frame->fpuctx, regs, set->sig[0]) ||
 	    __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set)))

diff --git a/trunk/arch/openrisc/Kconfig b/trunk/arch/openrisc/Kconfig
@@ -22,6 +22,7 @@ config OPENRISC
 	select GENERIC_STRNCPY_FROM_USER
 	select GENERIC_STRNLEN_USER
 	select MODULES_USE_ELF_RELA
+	select GENERIC_SIGALTSTACK
 
 config MMU
 	def_bool y

diff --git a/trunk/arch/openrisc/kernel/entry.S b/trunk/arch/openrisc/kernel/entry.S
@@ -1083,10 +1083,6 @@ ENTRY(__sys_fork)
 	l.j	_fork_save_extra_regs_and_call
 	 l.addi	r3,r1,0
 
-ENTRY(sys_sigaltstack)
-	l.j	_sys_sigaltstack
-	 l.addi	r5,r1,0
-
 ENTRY(sys_rt_sigreturn)
 	l.j	_sys_rt_sigreturn
 	 l.addi	r3,r1,0

diff --git a/trunk/arch/openrisc/kernel/signal.c b/trunk/arch/openrisc/kernel/signal.c
@@ -33,12 +33,6 @@
 
 #define DEBUG_SIG 0
 
-asmlinkage long
-_sys_sigaltstack(const stack_t *uss, stack_t *uoss, struct pt_regs *regs)
-{
-	return do_sigaltstack(uss, uoss, regs->sp);
-}
-
 struct rt_sigframe {
 	struct siginfo *pinfo;
 	void *puc;
@@ -103,9 +97,7 @@ asmlinkage long _sys_rt_sigreturn(struct pt_regs *regs)
 	if (restore_sigcontext(regs, &frame->uc.uc_mcontext))
 		goto badframe;
 
-	/* It is more difficult to avoid calling this function than to
-	   call it and ignore errors.  */
-	if (do_sigaltstack(&frame->uc.uc_stack, NULL, regs->sp) == -EFAULT)
+	if (restore_altstack(&frame->uc.uc_stack))
 		goto badframe;
 
 	return regs->gpr[11];
@@ -205,10 +197,7 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 	err |= __clear_user(&frame->uc, offsetof(struct ucontext, uc_mcontext));
 	err |= __put_user(0, &frame->uc.uc_flags);
 	err |= __put_user(NULL, &frame->uc.uc_link);
-	err |= __put_user((void *)current->sas_ss_sp,
-			  &frame->uc.uc_stack.ss_sp);
-	err |= __put_user(sas_ss_flags(regs->sp), &frame->uc.uc_stack.ss_flags);
-	err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
+	err |= __save_altstack(&frame->uc.uc_stack, regs->sp);
 	err |= setup_sigcontext(&frame->uc.uc_mcontext, regs, set->sig[0]);
 
 	err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));