diff options
Diffstat (limited to 'gdb/i386fbsd-tdep.c')
| -rw-r--r-- | gdb/i386fbsd-tdep.c | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/gdb/i386fbsd-tdep.c b/gdb/i386fbsd-tdep.c new file mode 100644 index 0000000..786de7d --- /dev/null +++ b/gdb/i386fbsd-tdep.c @@ -0,0 +1,171 @@ +/* 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); +} |