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From: Sebastian Huber <sh@sourceware.org>
To: newlib-cvs@sourceware.org
Subject: [newlib-cygwin] sparc: Improve setjmp()
Date: Thu, 12 Oct 2023 15:05:37 +0000 (GMT)	[thread overview]
Message-ID: <20231012150537.C38893858404@sourceware.org> (raw)

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=fbc5496e40eeb6d0d2ae2a3bf90182e2a9cd74f0

commit fbc5496e40eeb6d0d2ae2a3bf90182e2a9cd74f0
Author: Sebastian Huber <sebastian.huber@embedded-brains.de>
Date:   Fri Oct 6 07:29:05 2023 +0200

    sparc: Improve setjmp()
    
    Flush the windows in setjmp().  This helps if the stack is changed after
    the setjmp() and we want to jump back to the original stack using
    longjmp().

Diff:
---
 newlib/libc/machine/sparc/setjmp.S | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/newlib/libc/machine/sparc/setjmp.S b/newlib/libc/machine/sparc/setjmp.S
index 613df2ba2..d7185be4c 100644
--- a/newlib/libc/machine/sparc/setjmp.S
+++ b/newlib/libc/machine/sparc/setjmp.S
@@ -110,6 +110,8 @@
 
 ENTRY(setjmp)
 ENTRY(_setjmp)
+        ta      0x03            /* Flush registers, just in case another stack
+                                   is used after the setjmp().  */
         st      %sp, [%o0]      /* caller's stack pointer */
         st      %i7, [%o0+4]    /* caller's return pc */
         st      %fp, [%o0+8]    /* store caller's frame pointer */

                 reply	other threads:[~2023-10-12 15:05 UTC|newest]

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