/* Target-dependent code for i386 BSD's.
- Copyright 2001, 2002, 2003 Free Software Foundation, Inc.
+
+ Copyright 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
This file is part of GDB.
/* Support for signal handlers. */
-/* Return whether PC is in a BSD sigtramp routine. */
-
-static int
-i386bsd_pc_in_sigtramp (CORE_ADDR pc, char *name)
-{
- struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
-
- return (pc >= tdep->sigtramp_start && pc < tdep->sigtramp_end);
-}
-
/* Assuming NEXT_FRAME is for a frame following a BSD sigtramp
routine, return the address of the associated sigcontext structure. */
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);
}
-
-/* Return the start address of the sigtramp routine. */
-
-CORE_ADDR
-i386bsd_sigtramp_start (CORE_ADDR pc)
-{
- return gdbarch_tdep (current_gdbarch)->sigtramp_start;
-}
-
-/* Return the end address of the sigtramp routine. */
-
-CORE_ADDR
-i386bsd_sigtramp_end (CORE_ADDR pc)
-{
- return gdbarch_tdep (current_gdbarch)->sigtramp_end;
-}
\f
/* Support for shared libraries. */
-/* Return non-zero if we are in a shared library trampoline code stub. */
-
-int
-i386bsd_aout_in_solib_call_trampoline (CORE_ADDR pc, char *name)
-{
- return (name && !strcmp (name, "_DYNAMIC"));
-}
-
/* 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)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
- set_gdbarch_pc_in_sigtramp (gdbarch, i386bsd_pc_in_sigtramp);
-
- /* Allow the recognition of sigtramps as a function named <sigtramp>. */
- set_gdbarch_sigtramp_start (gdbarch, i386bsd_sigtramp_start);
- set_gdbarch_sigtramp_end (gdbarch, i386bsd_sigtramp_end);
-
- /* Assume SunOS-style shared libraries. */
- set_gdbarch_in_solib_call_trampoline (gdbarch,
- i386bsd_aout_in_solib_call_trampoline);
-
tdep->jb_pc_offset = 0;
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
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);
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 a flavour for NetBSD style a.out core files. */
+ gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_unknown_flavour,
+ i386bsd_core_osabi_sniffer);
}