Libc-763.11.tar.gz

[apple/libc.git] / ppc / sys / _setjmp.h

diff --git a/ppc/sys/_setjmp.h b/ppc/sys/_setjmp.h
index 40e4a87e31fe5afbb190071d299dde21e56c44fb..68fb68619519446fc754c568c766e6624d17487d 100644 (file)
--- a/ppc/sys/_setjmp.h
+++ b/ppc/sys/_setjmp.h
@@ -3,8 +3,6 @@
  *
  * @APPLE_LICENSE_HEADER_START@
  * 
- * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
- * 
  * 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
@@ -37,8 +35,19 @@
  * is bcopy'd to a different alignment between the setjmp
  * and longjmp, we need to save the jmp_buf address in the
  * jmp_buf at setjmp time, so we can realign before reloading.
+ *
+ * ALSO NOTE: the typedef for jmpbufs in <ppc/setjmp.h> is
+ * 192 ints (0x300 bytes) long, due to incorrectly assuming
+ * that we need to save all 32 VRs in a jmpbuf.  This is
+ * fortuitous, because when it came time to add additional
+ * fields and expand GPRs for 64-bit mode, there was plenty
+ * of unused space!
  */
  
+ /* 32-bit-mode layout */
+ 
+#if defined(__ppc__)
+ 
 #define JMP_r1 0x00
 #define JMP_r2 0x04
 #define JMP_r13        0x08
@@ -62,11 +71,9 @@
 #define JMP_r31        0x50
 #define JMP_lr  0x54
 #define JMP_cr  0x58
-#define JMP_ctr        0x5c
-#define JMP_xer        0x60
-#define JMP_sig        0x64
-#define JMP_SIGFLAG 0x68
-#define JMP_flags 0x6c
+#define JMP_SIGFLAG 0x5c
+#define JMP_sig        0x60    /* reserve 8 bytes for sigmask */
+#define JMP_fpscr  0x68 /* reserve 8 bytes for FPSCR too */
 #define JMP_vrsave 0x70
 #define JMP_addr_at_setjmp 0x74
 /* 12 bytes padding here */
@@ -74,5 +81,50 @@
 /* save room for 12 VRs (v20-v31), or 0xC0 bytes */
 #define JMP_fp_base_addr 0x144
 /* save room for 18 FPRs (f14-f31), or 0x90 bytes */
-#define JMP_buf_end 0x1d4
+#define        JMP_ss_flags     0x1d4
+#define JMP_buf_end 0x1d8
+
+ 
+ /* 64-bit-mode layout */
+
+#elif defined(__ppc64__)
+
+#define JMP_r1 0x00
+#define JMP_r2 0x08
+#define JMP_r13        0x10
+#define JMP_r14        0x18
+#define JMP_r15        0x20
+#define JMP_r16        0x28
+#define JMP_r17        0x30
+#define JMP_r18        0x38
+#define JMP_r19        0x40
+#define JMP_r20        0x48
+#define JMP_r21        0x50
+#define JMP_r22        0x58
+#define JMP_r23        0x60
+#define JMP_r24        0x68
+#define JMP_r25        0x70
+#define JMP_r26        0x78
+#define JMP_r27        0x80
+#define JMP_r28        0x88
+#define JMP_r29        0x90
+#define JMP_r30        0x98
+#define JMP_r31        0xa0
+#define JMP_lr  0xa8
+#define JMP_cr  0xb0
+#define JMP_sig        0xb8
+#define JMP_SIGFLAG 0xc0
+#define JMP_fpscr  0xc8
+#define JMP_vrsave 0xd0
+#define JMP_addr_at_setjmp 0xd8
+/* 12 bytes padding here */
+#define JMP_vr_base_addr 0x0ec
+/* save room for 12 VRs (v20-v31), or 0xC0 bytes */
+#define JMP_fp_base_addr 0x1ac
+/* save room for 18 FPRs (f14-f31), or 0x90 bytes */
+#define        JMP_ss_flags     0x23c
+#define JMP_buf_end 0x240
 
+#else
+#error architecture not supported
+#endif
\ No newline at end of file