From e2a86a90afcc3e54ce799ac96664125bc723918d Mon Sep 17 00:00:00 2001
From: "David E. O'Brien" <obrien@FreeBSD.org>
Date: Wed, 10 Jul 2002 07:48:45 +0000
Subject: [PATCH] Make our i386 hacks in a less vendor file disturbing manner.

---
 contrib/gdb/gdb/config/i386/tm-fbsd.h     | 50 ++++++++++-------------
 gnu/usr.bin/binutils/gdb/fbsd-kgdb-i386.h | 25 ++++++++++++
 2 files changed, 46 insertions(+), 29 deletions(-)

diff --git a/contrib/gdb/gdb/config/i386/tm-fbsd.h b/contrib/gdb/gdb/config/i386/tm-fbsd.h
index dc82d0e426b3..85b648027c3a 100644
--- a/contrib/gdb/gdb/config/i386/tm-fbsd.h
+++ b/contrib/gdb/gdb/config/i386/tm-fbsd.h
@@ -26,10 +26,6 @@
 #define HAVE_I387_REGS
 #include "i386/tm-i386.h"
 
-#ifdef HAVE_SYS_PARAM_H
-#include <sys/param.h>
-#endif
-
 /* FreeBSD/ELF uses stabs-in-ELF with the DWARF register numbering
    scheme by default, so we must redefine STAB_REG_TO_REGNUM.  This
    messes up the floating-point registers for a.out, but there is not
@@ -47,42 +43,38 @@
 /* Support for longjmp.  */
 
 /* Details about jmp_buf.  It's supposed to be an array of integers.  */
+
+#define JB_ELEMENT_SIZE 4	/* Size of elements in jmp_buf.  */
+#define JB_PC		0	/* Array index of saved PC.  */
+
+/* Figure out where the longjmp will land.  Store the address that
+   longjmp will jump to in *ADDR, and return non-zero if successful.  */
+
 #define GET_LONGJMP_TARGET(addr) get_longjmp_target (addr)
+extern int get_longjmp_target (CORE_ADDR *addr);
 
 
-/* On FreeBSD, sigtramp has size 0x18 and is immediately below the
-   ps_strings struct which has size 0x10 and is at the top of the
-   user stack.  */
+/* Support for signal handlers.  */
 
-#undef SIGTRAMP_START
-#undef SIGTRAMP_END
-#define SIGTRAMP_START(pc)    0xbfbfdfd8
-#define SIGTRAMP_END(pc)      0xbfbfdff0
+#define IN_SIGTRAMP(pc, name) i386bsd_in_sigtramp (pc, name)
+extern int i386bsd_in_sigtramp (CORE_ADDR pc, char *name);
 
+/* These defines allow the recognition of sigtramps as a function name
+   <sigtramp>.
+
+   FIXME: kettenis/2001-07-13: These should be added to the target
+   vector and turned into functions when we go "multi-arch".  */
+
+#define SIGTRAMP_START(pc) i386bsd_sigtramp_start
+#define SIGTRAMP_END(pc) i386bsd_sigtramp_end
 extern CORE_ADDR i386bsd_sigtramp_start;
 extern CORE_ADDR i386bsd_sigtramp_end;
-extern CORE_ADDR fbsd_kern_frame_saved_pc(struct frame_info *fr);
 
 /* Override FRAME_SAVED_PC to enable the recognition of signal handlers.  */
 
 #undef FRAME_SAVED_PC
-#if __FreeBSD_version >= 500032
-#define FRAME_SAVED_PC(FRAME) \
-  (kernel_debugging ? fbsd_kern_frame_saved_pc(FRAME) : \
-  (((FRAME)->signal_handler_caller \
-    ? sigtramp_saved_pc (FRAME) \
-    : read_memory_integer ((FRAME)->frame + 4, 4)) \
-   ))
-#else
-#define FRAME_SAVED_PC(FRAME) \
-  (((FRAME)->signal_handler_caller \
-    ? sigtramp_saved_pc (FRAME) \
-    : read_memory_integer ((FRAME)->frame + 4, 4)) \
-   )
-#endif
-
-/* Offset to saved PC in sigcontext, from <sys/signal.h>.  */
-#define SIGCONTEXT_PC_OFFSET 20
+#define FRAME_SAVED_PC(frame) i386bsd_frame_saved_pc (frame)
+extern CORE_ADDR i386bsd_frame_saved_pc (struct frame_info *frame);
 
 
 /* Shared library support.  */
diff --git a/gnu/usr.bin/binutils/gdb/fbsd-kgdb-i386.h b/gnu/usr.bin/binutils/gdb/fbsd-kgdb-i386.h
index 45fae7db3097..044b71fc63e7 100644
--- a/gnu/usr.bin/binutils/gdb/fbsd-kgdb-i386.h
+++ b/gnu/usr.bin/binutils/gdb/fbsd-kgdb-i386.h
@@ -3,4 +3,29 @@
 #ifndef FBSD_KGDB_I386_H
 #define FBSD_KGDB_I386_H
 
+/* On FreeBSD, sigtramp has size 0x18 and is immediately below the
+   ps_strings struct which has size 0x10 and is at the top of the
+   user stack.  */
+
+#undef  SIGTRAMP_START
+#define SIGTRAMP_START(pc)	0xbfbfdfd8
+#undef  SIGTRAMP_END
+#define SIGTRAMP_END(pc)	0xbfbfdff0
+ 
+ 
+/* Override FRAME_SAVED_PC to enable the recognition of signal handlers.  */
+
+extern CORE_ADDR fbsd_kern_frame_saved_pc(struct frame_info *fr);
+
+#undef  FRAME_SAVED_PC
+#define FRAME_SAVED_PC(FRAME) \
+  (kernel_debugging \
+    ? fbsd_kern_frame_saved_pc(FRAME) : \
+    (FRAME)->signal_handler_caller \
+      ? sigtramp_saved_pc (FRAME) \
+      : read_memory_integer ((FRAME)->frame + 4, 4))
+
+/* Offset to saved PC in sigcontext, from <sys/signal.h>.  */
+#define SIGCONTEXT_PC_OFFSET 20
+
 #endif /* FBSD_KGDB_I386_H */