/* Target-dependent code for i386 BSD's. Copyright (C) 2001, 2002, 2003, 2004 Free Software Foundation, Inc. This file is part of GDB. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ #include "defs.h" #include "arch-utils.h" #include "frame.h" #include "gdbcore.h" #include "regcache.h" #include "osabi.h" #include "gdb_string.h" #include "i386-tdep.h" /* Support for signal handlers. */ /* Assuming NEXT_FRAME is for a frame following a BSD sigtramp routine, return the address of the associated sigcontext structure. */ static CORE_ADDR i386bsd_sigcontext_addr (struct frame_info *next_frame) { gdb_byte buf[4]; CORE_ADDR sp; frame_unwind_register (next_frame, I386_ESP_REGNUM, buf); sp = extract_unsigned_integer (buf, 4); return read_memory_unsigned_integer (sp + 8, 4); } /* Support for shared libraries. */ /* Traditional BSD (4.3 BSD, still used for BSDI and 386BSD). */ /* From <machine/signal.h>. */ 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); tdep->jb_pc_offset = 0; tdep->sigtramp_start = 0xfdbfdfc0; tdep->sigtramp_end = 0xfdbfe000; tdep->sigcontext_addr = i386bsd_sigcontext_addr; tdep->sc_reg_offset = i386bsd_sc_reg_offset; tdep->sc_num_regs = ARRAY_SIZE (i386bsd_sc_reg_offset); } static enum gdb_osabi i386bsd_aout_osabi_sniffer (bfd *abfd) { if (strcmp (bfd_get_target (abfd), "a.out-i386-netbsd") == 0) return GDB_OSABI_NETBSD_AOUT; if (strcmp (bfd_get_target (abfd), "a.out-i386-freebsd") == 0) return GDB_OSABI_FREEBSD_AOUT; 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; } /* Provide a prototype to silence -Wmissing-prototypes. */ void _initialize_i386bsd_tdep (void); void _initialize_i386bsd_tdep (void) { gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_aout_flavour, i386bsd_aout_osabi_sniffer); /* 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); }