Libc-763.11.tar.gz

[apple/libc.git] / ppc / sys / longjmp.s

diff --git a/ppc/sys/longjmp.s b/ppc/sys/longjmp.s
index 63d680659bc6317a4a1fa45d317bbaefae375f0a..44ef49591bc63f20f0617475bf985531fc7a749c 100644 (file)
--- a/ppc/sys/longjmp.s
+++ b/ppc/sys/longjmp.s
@@ -3,19 +3,20 @@
  *
  * @APPLE_LICENSE_HEADER_START@
  * 
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License").  You may not use this file except in compliance with the
- * License.  Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
  * 
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
  * 
  * @APPLE_LICENSE_HEADER_END@
  */
@@ -33,8 +34,13 @@
  *             Created. Derived from _setjmp.s, setjmp.c and setjmp.s
  */
 
-#include "SYS.h"
-#include <architecture/ppc/asm_help.h>
+/* We use mode-independent "g" opcodes such as "stg", and/or
+ * mode-independent macros such as MI_GET_ADDRESS.  These expand
+ * into word operations when targeting __ppc__, and into doubleword
+ * operations when targeting __ppc64__.
+ */
+#include <architecture/ppc/mode_independent_asm.h>
+
 #include "_setjmp.h"
 
 /*
@@ -43,21 +49,35 @@
 
 /*     void siglongjmp(sigjmp_buf env, int val); */
 
-LEAF(_siglongjmp)
-       lwz r0, JMP_SIGFLAG(r3) ; load sigflag saved by siglongjmp()
-       cmpwi cr1,r0,0                  ; this changes cr1[EQ] which is volatile
-       beq- cr1, L__longjmp    ; if r0 == 0 do _longjmp()
+MI_ENTRY_POINT(_siglongjmp)
+       lg      r0, JMP_SIGFLAG(r3)     ; load sigflag saved by siglongjmp()
+       cmpgi   cr1,r0,0                        ; this changes cr1 which is volatile
+       mr      r30, r3             ; preserve args across _sigsetmask
+       mr      r31, r4
+       beq--   cr1, L__exit        ; if r0 == 0 do _longjmp()
        ; else *** fall through *** to longjmp()
 
 /*     void longjmp(jmp_buf env, int val); */
 
-LEAF(_longjmp)
-L_longjmp:
-       mr r30, r3
-       mr r31, r4
-       lwz r3, JMP_sig(r3)             ; restore the signal mask
-       CALL_EXTERN(_sigsetmask)
-       mr r4, r31
-       mr r3, r30
-L__longjmp:
-       BRANCH_EXTERN(__longjmp)
+MI_ENTRY_POINT(_longjmp)
+       mr      r30, r3             ; preserve args across _sigsetmask
+       mr      r31, r4
+
+    /* NB: this code assumes the signal mask is an int.  Change the "lwz" below
+     * if not. The JMP_sig field is already 8 bytes in the jmpbuf.
+     */
+       lwz     r3, JMP_sig(r3)         ; restore the signal mask
+       MI_CALL_EXTERNAL(_sigsetmask)   // make a (deprecated!) syscall to set the mask
+L__exit:       
+       lwz             r3,JMP_ss_flags(r30)
+       MI_CALL_EXTERNAL(__sigunaltstack)
+L__exit2:
+       mr      r3, r30
+       mr      r4, r31
+       MI_BRANCH_EXTERNAL(__longjmp)
+
+
+
+
+
+