1130803Smarcel/* Target-dependent code for FreeBSD/i386. 2130803Smarcel 3130803Smarcel Copyright 2003, 2004 Free Software Foundation, Inc. 4130803Smarcel 5130803Smarcel This file is part of GDB. 6130803Smarcel 7130803Smarcel This program is free software; you can redistribute it and/or modify 8130803Smarcel it under the terms of the GNU General Public License as published by 9130803Smarcel the Free Software Foundation; either version 2 of the License, or 10130803Smarcel (at your option) any later version. 11130803Smarcel 12130803Smarcel This program is distributed in the hope that it will be useful, 13130803Smarcel but WITHOUT ANY WARRANTY; without even the implied warranty of 14130803Smarcel MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15130803Smarcel GNU General Public License for more details. 16130803Smarcel 17130803Smarcel You should have received a copy of the GNU General Public License 18130803Smarcel along with this program; if not, write to the Free Software 19130803Smarcel Foundation, Inc., 59 Temple Place - Suite 330, 20130803Smarcel Boston, MA 02111-1307, USA. */ 21130803Smarcel 22130803Smarcel#include "defs.h" 23130803Smarcel#include "arch-utils.h" 24130803Smarcel#include "osabi.h" 25130803Smarcel 26130803Smarcel#include "i386-tdep.h" 27130803Smarcel#include "i387-tdep.h" 28130803Smarcel#include "solib-svr4.h" 29130803Smarcel 30130803Smarcel/* FreeBSD 3.0-RELEASE or later. */ 31130803Smarcel 32130803Smarcel/* From <machine/reg.h>. */ 33130803Smarcelstatic int i386fbsd_r_reg_offset[] = 34130803Smarcel{ 35130803Smarcel 9 * 4, 8 * 4, 7 * 4, 6 * 4, /* %eax, %ecx, %edx, %ebx */ 36130803Smarcel 15 * 4, 4 * 4, /* %esp, %ebp */ 37130803Smarcel 3 * 4, 2 * 4, /* %esi, %edi */ 38130803Smarcel 12 * 4, 14 * 4, /* %eip, %eflags */ 39130803Smarcel 13 * 4, 16 * 4, /* %cs, %ss */ 40130803Smarcel 1 * 4, 0 * 4, -1, -1 /* %ds, %es, %fs, %gs */ 41130803Smarcel}; 42130803Smarcel 43130803Smarcel/* Sigtramp routine location. */ 44130803SmarcelCORE_ADDR i386fbsd_sigtramp_start_addr = 0xbfbfdf20; 45130803SmarcelCORE_ADDR i386fbsd_sigtramp_end_addr = 0xbfbfdff0; 46130803Smarcel 47130803Smarcel/* From <machine/signal.h>. */ 48130803Smarcelstatic int i386fbsd_sc_reg_offset[] = 49130803Smarcel{ 50130803Smarcel 8 + 14 * 4, /* %eax */ 51130803Smarcel 8 + 13 * 4, /* %ecx */ 52130803Smarcel 8 + 12 * 4, /* %edx */ 53130803Smarcel 8 + 11 * 4, /* %ebx */ 54130803Smarcel 8 + 0 * 4, /* %esp */ 55130803Smarcel 8 + 1 * 4, /* %ebp */ 56130803Smarcel 8 + 10 * 4, /* %esi */ 57130803Smarcel 8 + 9 * 4, /* %edi */ 58130803Smarcel 8 + 3 * 4, /* %eip */ 59130803Smarcel 8 + 4 * 4, /* %eflags */ 60130803Smarcel 8 + 7 * 4, /* %cs */ 61130803Smarcel 8 + 8 * 4, /* %ss */ 62130803Smarcel 8 + 6 * 4, /* %ds */ 63130803Smarcel 8 + 5 * 4, /* %es */ 64130803Smarcel 8 + 15 * 4, /* %fs */ 65130803Smarcel 8 + 16 * 4 /* %gs */ 66130803Smarcel}; 67130803Smarcel 68130803Smarcelstatic void 69130803Smarceli386fbsdaout_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) 70130803Smarcel{ 71130803Smarcel struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); 72130803Smarcel 73130803Smarcel /* Obviously FreeBSD is BSD-based. */ 74130803Smarcel i386bsd_init_abi (info, gdbarch); 75130803Smarcel 76130803Smarcel /* FreeBSD has a different `struct reg', and reserves some space for 77130803Smarcel its FPU emulator in `struct fpreg'. */ 78130803Smarcel tdep->gregset_reg_offset = i386fbsd_r_reg_offset; 79130803Smarcel tdep->gregset_num_regs = ARRAY_SIZE (i386fbsd_r_reg_offset); 80130803Smarcel tdep->sizeof_gregset = 18 * 4; 81130803Smarcel tdep->sizeof_fpregset = 176; 82130803Smarcel 83130803Smarcel /* FreeBSD uses -freg-struct-return by default. */ 84130803Smarcel tdep->struct_return = reg_struct_return; 85130803Smarcel 86130803Smarcel /* FreeBSD uses a different memory layout. */ 87130803Smarcel tdep->sigtramp_start = i386fbsd_sigtramp_start_addr; 88130803Smarcel tdep->sigtramp_end = i386fbsd_sigtramp_end_addr; 89130803Smarcel 90130803Smarcel /* FreeBSD has a more complete `struct sigcontext'. */ 91130803Smarcel tdep->sc_reg_offset = i386fbsd_sc_reg_offset; 92130803Smarcel tdep->sc_num_regs = ARRAY_SIZE (i386fbsd_sc_reg_offset); 93130803Smarcel} 94130803Smarcel 95130803Smarcelstatic void 96130803Smarceli386fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) 97130803Smarcel{ 98130803Smarcel /* It's almost identical to FreeBSD a.out. */ 99130803Smarcel i386fbsdaout_init_abi (info, gdbarch); 100130803Smarcel 101130803Smarcel /* Except that it uses ELF. */ 102130803Smarcel i386_elf_init_abi (info, gdbarch); 103130803Smarcel 104130803Smarcel /* FreeBSD ELF uses SVR4-style shared libraries. */ 105130803Smarcel set_gdbarch_in_solib_call_trampoline 106130803Smarcel (gdbarch, generic_in_solib_call_trampoline); 107130803Smarcel set_solib_svr4_fetch_link_map_offsets 108130803Smarcel (gdbarch, svr4_ilp32_fetch_link_map_offsets); 109130803Smarcel} 110130803Smarcel 111130803Smarcel/* FreeBSD 4.0-RELEASE or later. */ 112130803Smarcel 113130803Smarcel/* From <machine/reg.h>. */ 114130803Smarcelstatic int i386fbsd4_r_reg_offset[] = 115130803Smarcel{ 116130803Smarcel 10 * 4, 9 * 4, 8 * 4, 7 * 4, /* %eax, %ecx, %edx, %ebx */ 117130803Smarcel 16 * 4, 5 * 4, /* %esp, %ebp */ 118130803Smarcel 4 * 4, 3 * 4, /* %esi, %edi */ 119130803Smarcel 13 * 4, 15 * 4, /* %eip, %eflags */ 120130803Smarcel 14 * 4, 17 * 4, /* %cs, %ss */ 121130803Smarcel 2 * 4, 1 * 4, 0 * 4, 18 * 4 /* %ds, %es, %fs, %gs */ 122130803Smarcel}; 123130803Smarcel 124130803Smarcel/* From <machine/signal.h>. */ 125130803Smarcelint i386fbsd4_sc_reg_offset[] = 126130803Smarcel{ 127130803Smarcel 20 + 11 * 4, /* %eax */ 128130803Smarcel 20 + 10 * 4, /* %ecx */ 129130803Smarcel 20 + 9 * 4, /* %edx */ 130130803Smarcel 20 + 8 * 4, /* %ebx */ 131130803Smarcel 20 + 17 * 4, /* %esp */ 132130803Smarcel 20 + 6 * 4, /* %ebp */ 133130803Smarcel 20 + 5 * 4, /* %esi */ 134130803Smarcel 20 + 4 * 4, /* %edi */ 135130803Smarcel 20 + 14 * 4, /* %eip */ 136130803Smarcel 20 + 16 * 4, /* %eflags */ 137130803Smarcel 20 + 15 * 4, /* %cs */ 138130803Smarcel 20 + 18 * 4, /* %ss */ 139130803Smarcel 20 + 3 * 4, /* %ds */ 140130803Smarcel 20 + 2 * 4, /* %es */ 141130803Smarcel 20 + 1 * 4, /* %fs */ 142130803Smarcel 20 + 0 * 4 /* %gs */ 143130803Smarcel}; 144130803Smarcel 145130803Smarcelstatic void 146130803Smarceli386fbsd4_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) 147130803Smarcel{ 148130803Smarcel struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); 149130803Smarcel 150130803Smarcel /* Inherit stuff from older releases. We assume that FreeBSD 151130803Smarcel 4.0-RELEASE always uses ELF. */ 152130803Smarcel i386fbsd_init_abi (info, gdbarch); 153130803Smarcel 154130803Smarcel /* FreeBSD 4.0 introduced a new `struct reg'. */ 155130803Smarcel tdep->gregset_reg_offset = i386fbsd4_r_reg_offset; 156130803Smarcel tdep->gregset_num_regs = ARRAY_SIZE (i386fbsd4_r_reg_offset); 157130803Smarcel tdep->sizeof_gregset = 19 * 4; 158130803Smarcel 159130803Smarcel /* FreeBSD 4.0 introduced a new `struct sigcontext'. */ 160130803Smarcel tdep->sc_reg_offset = i386fbsd4_sc_reg_offset; 161130803Smarcel tdep->sc_num_regs = ARRAY_SIZE (i386fbsd4_sc_reg_offset); 162130803Smarcel} 163130803Smarcel 164130803Smarcel 165130803Smarcel/* Provide a prototype to silence -Wmissing-prototypes. */ 166130803Smarcelvoid _initialize_i386fbsd_tdep (void); 167130803Smarcel 168130803Smarcelvoid 169130803Smarcel_initialize_i386fbsd_tdep (void) 170130803Smarcel{ 171130803Smarcel gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_FREEBSD_AOUT, 172130803Smarcel i386fbsdaout_init_abi); 173130803Smarcel gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_FREEBSD_ELF, 174130803Smarcel i386fbsd4_init_abi); 175130803Smarcel} 176