2004-01-09 Elena Zannoni <ezannoni@redhat.com>

[deliverable/binutils-gdb.git] / gdb / i386bsd-tdep.c

diff --git a/gdb/i386bsd-tdep.c b/gdb/i386bsd-tdep.c
index d91be26b8006a76f8379b8a12c13adadef8f65be..67d09ee14d74aa207d13038da628fb72ac767c41 100644 (file)
--- a/gdb/i386bsd-tdep.c
+++ b/gdb/i386bsd-tdep.c
@@ -1,4 +1,5 @@
 /* Target-dependent code for i386 BSD's.
+
    Copyright 2001, 2002, 2003 Free Software Foundation, Inc.
 
    This file is part of GDB.
@@ -50,7 +51,7 @@ i386bsd_sigcontext_addr (struct frame_info *next_frame)
   char buf[4];
   CORE_ADDR sp;
 
-  frame_unwind_register (next_frame, SP_REGNUM, buf);
+  frame_unwind_register (next_frame, I386_ESP_REGNUM, buf);
   sp = extract_unsigned_integer (buf, 4);
 
   return read_memory_unsigned_integer (sp + 8, 4);
@@ -86,8 +87,25 @@ i386bsd_aout_in_solib_call_trampoline (CORE_ADDR pc, char *name)
 /* Traditional BSD (4.3 BSD, still used for BSDI and 386BSD).  */
 
 /* From <machine/signal.h>.  */
-int i386bsd_sc_pc_offset = 20;
-int i386bsd_sc_sp_offset = 8;
+int i386bsd_sc_reg_offset[] =
+{
+  -1,                          /* %eax */
+  -1,                          /* %ecx */
+  -1,                          /* %edx */
+  -1,                          /* %ebx */
+  8 + 0 * 4,                   /* %esp */
+  8 + 1 * 4,                   /* %ebp */
+  -1,                          /* %esi */
+  -1,                          /* %edi */
+  8 + 3 * 4,                   /* %eip */
+  8 + 4 * 4,                   /* %eflags */
+  -1,                          /* %cs */
+  -1,                          /* %ss */
+  -1,                          /* %ds */
+  -1,                          /* %es */
+  -1,                          /* %fs */
+  -1                           /* %gs */
+};
 
 void
 i386bsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
@@ -109,63 +127,8 @@ i386bsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
   tdep->sigtramp_start = 0xfdbfdfc0;
   tdep->sigtramp_end = 0xfdbfe000;
   tdep->sigcontext_addr = i386bsd_sigcontext_addr;
-  tdep->sc_pc_offset = i386bsd_sc_pc_offset;
-  tdep->sc_sp_offset = i386bsd_sc_sp_offset;
-}
-
-/* FreeBSD 3.0-RELEASE or later.  */
-
-CORE_ADDR i386fbsd_sigtramp_start = 0xbfbfdf20;
-CORE_ADDR i386fbsd_sigtramp_end = 0xbfbfdff0;
-
-static void
-i386fbsdaout_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
-{
-  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
-
-  /* Obviously FreeBSD is BSD-based.  */
-  i386bsd_init_abi (info, gdbarch);
-
-  /* FreeBSD uses -freg-struct-return by default.  */
-  tdep->struct_return = reg_struct_return;
-
-  /* FreeBSD uses a different memory layout.  */
-  tdep->sigtramp_start = i386fbsd_sigtramp_start;
-  tdep->sigtramp_end = i386fbsd_sigtramp_end;
-}
-
-static void
-i386fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
-{
-  /* It's almost identical to FreeBSD a.out.  */
-  i386fbsdaout_init_abi (info, gdbarch);
-
-  /* Except that it uses ELF.  */
-  i386_elf_init_abi (info, gdbarch);
-
-  /* FreeBSD ELF uses SVR4-style shared libraries.  */
-  set_gdbarch_in_solib_call_trampoline (gdbarch,
-                                       generic_in_solib_call_trampoline);
-}
-
-/* FreeBSD 4.0-RELEASE or later.  */
-
-/* From <machine/signal.h>.  */
-int i386fbsd4_sc_pc_offset = 76;
-int i386fbsd4_sc_sp_offset = 88;
-
-static void
-i386fbsd4_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
-{
-  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
-
-  /* Inherit stuff from older releases.  We assume that FreeBSD
-     4.0-RELEASE always uses ELF.  */
-  i386fbsd_init_abi (info, gdbarch);
-
-  /* FreeBSD 4.0 introduced a new `struct sigcontext'.  */
-  tdep->sc_pc_offset = i386fbsd4_sc_pc_offset;
-  tdep->sc_sp_offset = i386fbsd4_sc_sp_offset;
+  tdep->sc_reg_offset = i386bsd_sc_reg_offset;
+  tdep->sc_num_regs = ARRAY_SIZE (i386bsd_sc_reg_offset);
 }
 
 \f
@@ -181,6 +144,15 @@ i386bsd_aout_osabi_sniffer (bfd *abfd)
   return GDB_OSABI_UNKNOWN;
 }
 
+static enum gdb_osabi
+i386bsd_core_osabi_sniffer (bfd *abfd)
+{
+  if (strcmp (bfd_get_target (abfd), "netbsd-core") == 0)
+    return GDB_OSABI_NETBSD_AOUT;
+
+  return GDB_OSABI_UNKNOWN;
+}
+
 \f
 /* Provide a prototype to silence -Wmissing-prototypes.  */
 void _initialize_i386bsd_tdep (void);
@@ -191,8 +163,8 @@ _initialize_i386bsd_tdep (void)
   gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_aout_flavour,
                                  i386bsd_aout_osabi_sniffer);
 
-  gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_FREEBSD_AOUT,
-                         i386fbsdaout_init_abi);
-  gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_FREEBSD_ELF,
-                         i386fbsd4_init_abi);
+  /* BFD doesn't set the architecture for NetBSD style a.out core
+     files.  */
+  gdbarch_register_osabi_sniffer (bfd_arch_unknown, bfd_target_unknown_flavour,
+                                 i386bsd_core_osabi_sniffer);
 }