Add support for FreeBSD/i386 ELF.

* i386bsd-nat.c: New file.
* config/i386/tm-fbsd.h (HAVE_I387_REGS): Define.
Include "i386/tm-i386.h" instead of "i386/tm-i386b.h".
(NUM_REGS): Remove redefinition.
(USE_STRUCT_CONVENTION): Define.
(i386_float_info): Remove prototype.
(FLOAT_INFO): Remove define.
(JB_ELEMENT_SIZE): Define to 4.
(JB_PC): Define to 0.
(GET_LONGJMP_TARGET): Define.
(SIGTRAMP_START, SIGTRAMP_END): Define.
(SIGCONTEXT_PC_OFFSET): Define.
(IN_SOLIB_CALL_TRAMPOLINE): Only define if !SVR4_SHARED_LIBS
* config/i386/nm-fbsd.h (PTRACE_ARG3_TYPE): Define to caddr_t.
(FETCH_INFERIOR_REGISTERS): Define.
(ATTACH_DETACH): Define.
(kernel_u_size): Remove PARAMS.
(register_u_addr): Use CORE_ADDR in prototype where appropriate.
Remove PARAMS.
(SVR4_SHARED_LIBS) [FREEBSD_ELF || __ELF__ && !FREEBSD_AOUT]:
Define.
[SVR4_SHARED_LIBS]: Include "elf/common.h".
Only define aliases for struct members from <link.h> if
!SVR4_SHARED_LIBS.
* config/i386/xm-fbsd.h: New file.
* config/i386/fbsd.mt (TDEPFILES): Remove solib.o.
* config/i386/fbsd.mh (NATDEPFILES): Remove i386b-nat.o.  Add
core-regset.o i387-nat.o i386bsd-nat.o.

1 files changed, 47 insertions, 9 deletions

diff --git a/gdb/config/i386/tm-fbsd.h b/gdb/config/i386/tm-fbsd.h
index 0e2df32..df278a8 100644
--- a/gdb/config/i386/tm-fbsd.h
+++ b/gdb/config/i386/tm-fbsd.h
@@ -1,5 +1,5 @@
-/* Target macro definitions for i386 running FreeBSD
-   Copyright (C) 1997 Free Software Foundation, Inc.
+/* Target-dependent definitions for FreeBSD/i386.
+   Copyright (C) 1997, 2000 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
@@ -18,16 +18,54 @@
    Foundation, Inc., 59 Temple Place - Suite 330,
    Boston, MA 02111-1307, USA.  */
 
-#include "i386/tm-i386bsd.h"
+#ifndef TM_FBSD_H
+#define TM_FBSD_H
 
+#define HAVE_I387_REGS
+#include "i386/tm-i386.h"
 
-#undef NUM_REGS
-#define NUM_REGS 14
+/* FreeBSD uses the old gcc convention for struct returns.  */
 
+#define USE_STRUCT_CONVENTION(gcc_p, type) \
+  generic_use_struct_convention (1, type)
+
 
-#undef IN_SOLIB_CALL_TRAMPOLINE
-#define IN_SOLIB_CALL_TRAMPOLINE(pc, name) STREQ (name, "_DYNAMIC")
+/* Support for longjmp.  */
 
+/* Details about jmp_buf.  It's supposed to be an array of integers.  */
 
-extern i386_float_info ();
-#define FLOAT_INFO  i386_float_info ()
+#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.  */
+
+extern int get_longjmp_target (CORE_ADDR *addr);
+#define GET_LONGJMP_TARGET(addr) get_longjmp_target (addr)
+
+
+/* Support for signal handlers.  */
+
+/* The sigtramp is above the user stack and immediately below
+   the user area.  Using constants here allows for cross debugging.
+   These are tested for FreeBSD 3.4.  */
+
+#define SIGTRAMP_START(pc)	0xbfbfdf20
+#define SIGTRAMP_END(pc)	0xbfbfdff0
+
+/* Offset to saved PC in sigcontext, from <sys/signal.h>.  */
+#define SIGCONTEXT_PC_OFFSET 20
+
+
+/* Shared library support.  */
+
+#ifndef SVR4_SHARED_LIBS
+
+/* Return non-zero if we are in a shared library trampoline code stub.  */
+
+#define IN_SOLIB_CALL_TRAMPOLINE(pc, name) \
+  (name && !strcmp(name, "_DYNAMIC"))
+
+#endif /* !SVR4_SHARED_LIBS */
+
+#endif /* TM_FBSD_H */