| /* Target-dependent code for FreeBSD/i386. |
| |
| Copyright 2003 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., 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| #include "defs.h" |
| #include "arch-utils.h" |
| #include "osabi.h" |
| |
| #include "i386-tdep.h" |
| #include "i387-tdep.h" |
| |
| /* FreeBSD 3.0-RELEASE or later. */ |
| |
| /* From <machine/reg.h>. */ |
| static int i386fbsd_r_reg_offset[] = |
| { |
| 9 * 4, 8 * 4, 7 * 4, 6 * 4, /* %eax, %ecx, %edx, %ebx */ |
| 15 * 4, 4 * 4, /* %esp, %ebp */ |
| 3 * 4, 2 * 4, /* %esi, %edi */ |
| 12 * 4, 14 * 4, /* %eip, %eflags */ |
| 13 * 4, 16 * 4, /* %cs, %ss */ |
| 1 * 4, 0 * 4, -1, -1 /* %ds, %es, %fs, %gs */ |
| }; |
| |
| CORE_ADDR i386fbsd_sigtramp_start = 0xbfbfdf20; |
| CORE_ADDR i386fbsd_sigtramp_end = 0xbfbfdff0; |
| |
| /* From <machine/signal.h>. */ |
| static int i386fbsd_sc_reg_offset[] = |
| { |
| 8 + 14 * 4, /* %eax */ |
| 8 + 13 * 4, /* %ecx */ |
| 8 + 12 * 4, /* %edx */ |
| 8 + 11 * 4, /* %ebx */ |
| 8 + 0 * 4, /* %esp */ |
| 8 + 1 * 4, /* %ebp */ |
| 8 + 10 * 4, /* %esi */ |
| 8 + 9 * 4, /* %edi */ |
| 8 + 3 * 4, /* %eip */ |
| 8 + 4 * 4, /* %eflags */ |
| 8 + 7 * 4, /* %cs */ |
| 8 + 8 * 4, /* %ss */ |
| 8 + 6 * 4, /* %ds */ |
| 8 + 5 * 4, /* %es */ |
| 8 + 15 * 4, /* %fs */ |
| 8 + 16 * 4 /* %gs */ |
| }; |
| |
| 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 has a different `struct reg', and reserves some space for |
| its FPU emulator in `struct fpreg'. */ |
| tdep->gregset_reg_offset = i386fbsd_r_reg_offset; |
| tdep->gregset_num_regs = ARRAY_SIZE (i386fbsd_r_reg_offset); |
| tdep->sizeof_gregset = 18 * 4; |
| tdep->sizeof_fpregset = 176; |
| |
| /* 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; |
| |
| /* FreeBSD has a more complete `struct sigcontext'. */ |
| tdep->sc_reg_offset = i386fbsd_sc_reg_offset; |
| tdep->sc_num_regs = ARRAY_SIZE (i386fbsd_sc_reg_offset); |
| } |
| |
| 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/reg.h>. */ |
| static int i386fbsd4_r_reg_offset[] = |
| { |
| 10 * 4, 9 * 4, 8 * 4, 7 * 4, /* %eax, %ecx, %edx, %ebx */ |
| 16 * 4, 5 * 4, /* %esp, %ebp */ |
| 4 * 4, 3 * 4, /* %esi, %edi */ |
| 13 * 4, 15 * 4, /* %eip, %eflags */ |
| 14 * 4, 17 * 4, /* %cs, %ss */ |
| 2 * 4, 1 * 4, 0 * 4, 18 * 4 /* %ds, %es, %fs, %gs */ |
| }; |
| |
| /* From <machine/signal.h>. */ |
| int i386fbsd4_sc_reg_offset[] = |
| { |
| 20 + 11 * 4, /* %eax */ |
| 20 + 10 * 4, /* %ecx */ |
| 20 + 9 * 4, /* %edx */ |
| 20 + 8 * 4, /* %ebx */ |
| 20 + 17 * 4, /* %esp */ |
| 20 + 6 * 4, /* %ebp */ |
| 20 + 5 * 4, /* %esi */ |
| 20 + 4 * 4, /* %edi */ |
| 20 + 14 * 4, /* %eip */ |
| 20 + 16 * 4, /* %eflags */ |
| 20 + 15 * 4, /* %cs */ |
| 20 + 18 * 4, /* %ss */ |
| 20 + 3 * 4, /* %ds */ |
| 20 + 2 * 4, /* %es */ |
| 20 + 1 * 4, /* %fs */ |
| 20 + 0 * 4 /* %gs */ |
| }; |
| |
| 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 reg'. */ |
| tdep->gregset_reg_offset = i386fbsd4_r_reg_offset; |
| tdep->gregset_num_regs = ARRAY_SIZE (i386fbsd4_r_reg_offset); |
| tdep->sizeof_gregset = 19 * 4; |
| |
| /* FreeBSD 4.0 introduced a new `struct sigcontext'. */ |
| tdep->sc_reg_offset = i386fbsd4_sc_reg_offset; |
| tdep->sc_num_regs = ARRAY_SIZE (i386fbsd4_sc_reg_offset); |
| } |
| |
| |
| /* Provide a prototype to silence -Wmissing-prototypes. */ |
| void _initialize_i386fbsd_tdep (void); |
| |
| void |
| _initialize_i386fbsd_tdep (void) |
| { |
| 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); |
| } |