* defs.h, utils.c: xrealloc takes PTR as first arg.

	* defs.h:  Reword confusing comment about ANSI prototypes.
	* defs.h:  Some minor whitespace changes.
	* infrun.c (wait_for_inferior):  Compare int tmp to int 0,
	not NULL, which can be (void *).
	* tm-amix.h, tm-i386v4.h:  Add defines for setjmp/longjmp handling.
	* tm-i386v.h (SP_ARG0):  Define
	* xm-sysv4.h:  Back out of change for missing prototypes.
	* i386-tdep.c (get_longjmp_target):  Add function.

1 files changed, 30 insertions, 0 deletions

diff --git a/gdb/tm-amix.h b/gdb/tm-amix.h
index e13fc89..9a43be7 100644
--- a/gdb/tm-amix.h
+++ b/gdb/tm-amix.h
@@ -45,3 +45,33 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
 
 #include "tm-sysv4.h"
 #include "tm-68k.h"
+
+/* Offsets (in target ints) into jmp_buf.  Not defined in any system header
+   file, so we have to step through setjmp/longjmp with a debugger and figure
+   them out.  As a double check, note that <setjmp> defines _JBLEN as 13,
+   which matches the number of elements we see saved by setjmp(). */
+
+#define JB_ELEMENT_SIZE sizeof(int)	/* jmp_buf[_JBLEN] is array of ints */
+
+#define JB_D2	0
+#define JB_D3	1
+#define JB_D4	2
+#define JB_D5	3
+#define JB_D6	4
+#define JB_D7	5
+#define JB_A1	6
+#define JB_A2	7
+#define JB_A3	8
+#define JB_A4	9
+#define JB_A5	10
+#define JB_A6	11
+#define JB_A7	12
+
+#define JB_PC	JB_A1	/* Setjmp()'s return PC saved in A1 */
+
+/* Figure out where the longjmp will land.  Slurp the args out of the stack.
+   We expect the first arg to be a pointer to the jmp_buf structure from which
+   we extract the pc (JB_PC) that we will land at.  The pc is copied into ADDR.
+   This routine returns true on success */
+
+#define GET_LONGJMP_TARGET(ADDR) get_longjmp_target(ADDR)