X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=gdb%2Ftm-i386v4.h;h=59a3733a7b382b0c0a3cbcdfafb92584c68fbd6e;hb=51b80b0072e928c9163087e1fcbc71e52301f524;hp=244e43ea4c66025abc42eef75de074787900395a;hpb=ee1ad69ccdd586171462c68235793bdf71f0b33d;p=deliverable%2Fbinutils-gdb.git

diff --git a/gdb/tm-i386v4.h b/gdb/tm-i386v4.h
index 244e43ea4c..59a3733a7b 100644
--- a/gdb/tm-i386v4.h
+++ b/gdb/tm-i386v4.h
@@ -41,3 +41,29 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
 
 #undef FRAME_NUM_ARGS
 #define FRAME_NUM_ARGS(val,fi) (val = -1)
+
+/* 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.  Note that <setjmp> defines _JBLEN as 10, which is the default
+   if no specific machine is selected, even though we only use 6 slots. */
+
+#define JB_ELEMENT_SIZE sizeof(int)	/* jmp_buf[_JBLEN] is array of ints */
+
+#define JB_EBX	0
+#define JB_ESI	1
+#define JB_EDI	2
+#define JB_EBP	3
+#define JB_ESP	4
+#define JB_EDX	5
+
+#define JB_PC	JB_EDX	/* Setjmp()'s return PC saved in EDX */
+
+/* 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 */
+
+extern int
+get_longjmp_target PARAMS ((CORE_ADDR *));
+
+#define GET_LONGJMP_TARGET(ADDR) get_longjmp_target(ADDR)