From: Uros Bizjak <ubizjak@gmail.com>
Date: Wed, 20 Feb 2019 21:37:21 +0000 (+0100)
Subject: linux-unwind.h (alpha_fallback_frame_state): Cast 'mcontext_t *' &rt_->uc.uc_mcontext... 
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=1ed28eda9f29927b4c08f50cecb8a43e5fbe1d81;p=gcc.git

linux-unwind.h (alpha_fallback_frame_state): Cast 'mcontext_t *' &rt_->uc.uc_mcontext to 'struct sigcontext *'.

	* config/alpha/linux-unwind.h (alpha_fallback_frame_state):
	Cast 'mcontext_t *' &rt_->uc.uc_mcontext to 'struct sigcontext *'.

From-SVN: r269053
---

diff --git a/libgcc/ChangeLog b/libgcc/ChangeLog
index c8b59b4814b..1ada0793546 100644
--- a/libgcc/ChangeLog
+++ b/libgcc/ChangeLog
@@ -1,3 +1,8 @@
+2019-02-20  Uroš Bizjak  <ubizjak@gmail.com>
+
+	* config/alpha/linux-unwind.h (alpha_fallback_frame_state):
+	Cast 'mcontext_t *' &rt_->uc.uc_mcontext to 'struct sigcontext *'.
+
 2019-02-19  Uroš Bizjak  <ubizjak@gmail.com>
 
 	* unwind-dw2.c (_Unwind_GetGR) [DWARF_ZERO_REG]: Compare
diff --git a/libgcc/config/alpha/linux-unwind.h b/libgcc/config/alpha/linux-unwind.h
index ec75c793454..482564910f8 100644
--- a/libgcc/config/alpha/linux-unwind.h
+++ b/libgcc/config/alpha/linux-unwind.h
@@ -53,7 +53,10 @@ alpha_fallback_frame_state (struct _Unwind_Context *context,
 	siginfo_t info;
 	ucontext_t uc;
       } *rt_ = context->cfa;
-      sc = &rt_->uc.uc_mcontext;
+      /* The void * cast is necessary to avoid an aliasing warning.
+         The aliasing warning is correct, but should not be a problem
+         because it does not alias anything.  */
+      sc = (struct sigcontext *) (void *) &rt_->uc.uc_mcontext;
     }
   else
     return _URC_END_OF_STACK;