X-Git-Url: http://pilppa.org/gitweb/?a=blobdiff_plain;f=arch%2Farm%2Fkernel%2Fsignal.c;h=54cdf1aeefc3df83458d83f1b5ff7dc9c41b5c10;hb=1eeb66a1bb973534dc3d064920a5ca683823372e;hp=1ce05ec086c6b40366a2d7aa349eef14af1b0410;hpb=c0897856553d45aee1780bed455b7c2e888dd64b;p=linux-2.6-omap-h63xx.git

diff --git a/arch/arm/kernel/signal.c b/arch/arm/kernel/signal.c
index 1ce05ec086c..54cdf1aeefc 100644
--- a/arch/arm/kernel/signal.c
+++ b/arch/arm/kernel/signal.c
@@ -7,12 +7,12 @@
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  */
-#include <linux/config.h>
 #include <linux/errno.h>
 #include <linux/signal.h>
-#include <linux/ptrace.h>
 #include <linux/personality.h>
+#include <linux/freezer.h>
 
+#include <asm/elf.h>
 #include <asm/cacheflush.h>
 #include <asm/ucontext.h>
 #include <asm/uaccess.h>
@@ -132,6 +132,37 @@ sys_sigaction(int sig, const struct old_sigaction __user *act,
 	return ret;
 }
 
+#ifdef CONFIG_CRUNCH
+static int preserve_crunch_context(struct crunch_sigframe *frame)
+{
+	char kbuf[sizeof(*frame) + 8];
+	struct crunch_sigframe *kframe;
+
+	/* the crunch context must be 64 bit aligned */
+	kframe = (struct crunch_sigframe *)((unsigned long)(kbuf + 8) & ~7);
+	kframe->magic = CRUNCH_MAGIC;
+	kframe->size = CRUNCH_STORAGE_SIZE;
+	crunch_task_copy(current_thread_info(), &kframe->storage);
+	return __copy_to_user(frame, kframe, sizeof(*frame));
+}
+
+static int restore_crunch_context(struct crunch_sigframe *frame)
+{
+	char kbuf[sizeof(*frame) + 8];
+	struct crunch_sigframe *kframe;
+
+	/* the crunch context must be 64 bit aligned */
+	kframe = (struct crunch_sigframe *)((unsigned long)(kbuf + 8) & ~7);
+	if (__copy_from_user(kframe, frame, sizeof(*frame)))
+		return -1;
+	if (kframe->magic != CRUNCH_MAGIC ||
+	    kframe->size != CRUNCH_STORAGE_SIZE)
+		return -1;
+	crunch_task_restore(current_thread_info(), &kframe->storage);
+	return 0;
+}
+#endif
+
 #ifdef CONFIG_IWMMXT
 
 static int preserve_iwmmxt_context(struct iwmmxt_sigframe *frame)
@@ -214,6 +245,10 @@ static int restore_sigframe(struct pt_regs *regs, struct sigframe __user *sf)
 	err |= !valid_user_regs(regs);
 
 	aux = (struct aux_sigframe __user *) sf->uc.uc_regspace;
+#ifdef CONFIG_CRUNCH
+	if (err == 0)
+		err |= restore_crunch_context(&aux->crunch);
+#endif
 #ifdef CONFIG_IWMMXT
 	if (err == 0 && test_thread_flag(TIF_USING_IWMMXT))
 		err |= restore_iwmmxt_context(&aux->iwmmxt);
@@ -249,11 +284,7 @@ asmlinkage int sys_sigreturn(struct pt_regs *regs)
 	if (restore_sigframe(regs, frame))
 		goto badframe;
 
-	/* Send SIGTRAP if we're single-stepping */
-	if (current->ptrace & PT_SINGLESTEP) {
-		ptrace_cancel_bpt(current);
-		send_sig(SIGTRAP, current, 1);
-	}
+	single_step_trap(current);
 
 	return regs->ARM_r0;
 
@@ -288,11 +319,7 @@ asmlinkage int sys_rt_sigreturn(struct pt_regs *regs)
 	if (do_sigaltstack(&frame->sig.uc.uc_stack, NULL, regs->ARM_sp) == -EFAULT)
 		goto badframe;
 
-	/* Send SIGTRAP if we're single-stepping */
-	if (current->ptrace & PT_SINGLESTEP) {
-		ptrace_cancel_bpt(current);
-		send_sig(SIGTRAP, current, 1);
-	}
+	single_step_trap(current);
 
 	return regs->ARM_r0;
 
@@ -333,6 +360,10 @@ setup_sigframe(struct sigframe __user *sf, struct pt_regs *regs, sigset_t *set)
 	err |= __copy_to_user(&sf->uc.uc_sigmask, set, sizeof(*set));
 
 	aux = (struct aux_sigframe __user *) sf->uc.uc_regspace;
+#ifdef CONFIG_CRUNCH
+	if (err == 0)
+		err |= preserve_crunch_context(&aux->crunch);
+#endif
 #ifdef CONFIG_IWMMXT
 	if (err == 0 && test_thread_flag(TIF_USING_IWMMXT))
 		err |= preserve_iwmmxt_context(&aux->iwmmxt);
@@ -604,14 +635,12 @@ static int do_signal(sigset_t *oldset, struct pt_regs *regs, int syscall)
 	if (try_to_freeze())
 		goto no_signal;
 
-	if (current->ptrace & PT_SINGLESTEP)
-		ptrace_cancel_bpt(current);
+	single_step_clear(current);
 
 	signr = get_signal_to_deliver(&info, &ka, regs, NULL);
 	if (signr > 0) {
 		handle_signal(signr, &ka, &info, oldset, regs, syscall);
-		if (current->ptrace & PT_SINGLESTEP)
-			ptrace_set_bpt(current);
+		single_step_set(current);
 		return 1;
 	}
 
@@ -665,8 +694,7 @@ static int do_signal(sigset_t *oldset, struct pt_regs *regs, int syscall)
 			restart_syscall(regs);
 		}
 	}
-	if (current->ptrace & PT_SINGLESTEP)
-		ptrace_set_bpt(current);
+	single_step_set(current);
 	return 0;
 }