Libc-339.tar.gz

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

diff --git a/ppc/sys/setjmp.s b/ppc/sys/setjmp.s
index 78fbc7650a8d07f9dc2be707c72a882c59f59ff7..4a6492cf714c12c9a15457bdee41cfec41f07cf7 100644 (file)
--- a/ppc/sys/setjmp.s
+++ b/ppc/sys/setjmp.s
@@ -3,19 +3,22 @@
  *
  * @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.
+ * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
  * 
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * 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.
+ * 
+ * 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 +36,14 @@
  *             Created. Derived from _setjmp.s, setjmp.c and setjmp.s
  */
 
+/* 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 "SYS.h"
-#include <architecture/ppc/asm_help.h>
 #include "_setjmp.h"
 
 /*
@@ -43,26 +52,26 @@
 
 /*     int sigsetjmp(sigjmp_buf env, int savemask); */
 
-LEAF(_sigsetjmp)
-       cmpwi cr1,r4,0                  ; this changes cr1[EQ] which is volatile
-       stw r4, JMP_SIGFLAG(r3) ; save the sigflag for use by siglongjmp()
-       beq- cr1, L__setjmp             ; if r4 == 0 do _setjmp()
+MI_ENTRY_POINT(_sigsetjmp)
+       cmpgi   cr1,r4,0                        ; this changes cr1 which is volatile
+       stg     r4, JMP_SIGFLAG(r3)     ; save the sigflag for use by siglongjmp()
+       beq--   cr1, L__exit            ; if r4 == 0 do _setjmp()
        ; else *** fall through ***  to setjmp()
 
 /*     int setjmp(jmp_buf env); */
 
-LEAF(_setjmp)
-L_setjmp:
-       mflr r0
-       stw r31, JMP_r31(r3)
-       stw r0, JMP_lr(r3)
-       mr r31, r3
-       li r3, 0                                ; get the previous signal mask
-       CALL_EXTERN(_sigblock)
-       stw r3, JMP_sig(r31)    ; save the previous mask
-       mr r3, r31
-       lwz r0, JMP_lr(r3)
-       mtlr r0
-       lwz r31, JMP_r31(r3)
-L__setjmp:
-       BRANCH_EXTERN(__setjmp)
+MI_ENTRY_POINT(_setjmp)
+       mflr    r0
+       stg     r31, JMP_r31(r3)
+       stg     r0, JMP_lr(r3)
+       mr      r31, r3             ; save ptr to jmpbuf across call
+       li      r3, 1                           ; get the previous signal mask
+       li      r4, 0
+       la      r5, JMP_sig(r31)        ; get address where previous mask needs to be
+       MI_CALL_EXTERNAL(_sigprocmask) // make a syscall to get mask
+       mr      r3, r31             ; restore jmp_buf ptr
+       lg      r0, JMP_lr(r31)
+       lg      r31, JMP_r31(r31)
+       mtlr    r0
+L__exit:
+       MI_BRANCH_EXTERNAL(__setjmp)