* Implemented [sig]{set,long}jmp() for PPC. No idea, if it is any good,

but it compiles at least. :-)
* Pulled the architecture specific part out of <posix/setjmp.h> into
  <posix/arch/<arch>/arch_setjmp.h>.
* Moved setjmp_save_sigs.c from the x86 specific implementation into a
  "generic" sibling directory, since it is reusable (and actually used
  by the PPC implementation).
* Added generic/longjmp_return.c containing a function __longjmp_return,
  which is invoked at the end of siglongjmp(), resetting the signal mask
  and validating the return value. It is used by the PPC implementation,
  and should also be used by the x86 implementation, but I'll leave that
  to someone who's motivated enough to also test it. :-)


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15479 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/posix/arch/ppc/arch_setjmp.h

@@ -0,0 +1,10 @@
+/*
+ * Copyright 2005, Haiku, Inc.
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef _ARCH_SETJMP_H_
+#define _ARCH_SETJMP_H_
+
+typedef int __jmp_buf[23];
+
+#endif	/* _ARCH_SETJMP_H_ */

headers/posix/arch/x86/arch_setjmp.h

@@ -0,0 +1,10 @@
+/*
+ * Copyright 2005, Haiku, Inc.
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef _ARCH_SETJMP_H_
+#define _ARCH_SETJMP_H_
+
+typedef int __jmp_buf[6];
+
+#endif	/* _ARCH_SETJMP_H_ */

headers/posix/setjmp.h

@@ -5,12 +5,17 @@
 #ifndef _SETJMP_H_
 #define _SETJMP_H_
 
-
 #include <signal.h>
 
+// include architecture specific definitions
+#ifdef __INTEL__
+	#include <arch/x86/arch_setjmp.h>
+#elif __POWERPC__
+	#include <arch/ppc/arch_setjmp.h>
+#endif
 
-typedef struct __jmp_buf {
-	int			regs[6];	/* saved registers, stack & program pointer */
+typedef struct __jmp_buf_tag {
+	__jmp_buf	regs;		/* saved registers, stack & program pointer */
 	int			mask_was_saved;
 	sigset_t	saved_mask;
 } jmp_buf[1];