1130803Smarcel/* Target-dependent code for NetBSD/amd64. 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 "frame.h" 25130803Smarcel#include "gdbcore.h" 26130803Smarcel#include "osabi.h" 27130803Smarcel 28130803Smarcel#include "gdb_assert.h" 29130803Smarcel 30130803Smarcel#include "amd64-tdep.h" 31130803Smarcel#include "nbsd-tdep.h" 32130803Smarcel#include "solib-svr4.h" 33130803Smarcel 34130803Smarcel/* Support for signal handlers. */ 35130803Smarcel 36130803Smarcel/* Assuming NEXT_FRAME is for a frame following a BSD sigtramp 37130803Smarcel routine, return the address of the associated sigcontext structure. */ 38130803Smarcel 39130803Smarcelstatic CORE_ADDR 40130803Smarcelamd64nbsd_sigcontext_addr (struct frame_info *next_frame) 41130803Smarcel{ 42130803Smarcel CORE_ADDR sp; 43130803Smarcel 44130803Smarcel /* The stack pointer points at `struct sigcontext' upon entry of a 45130803Smarcel signal trampoline. */ 46130803Smarcel sp = frame_unwind_register_unsigned (next_frame, AMD64_RSP_REGNUM); 47130803Smarcel return sp; 48130803Smarcel} 49130803Smarcel 50130803Smarcel/* NetBSD 2.0 or later. */ 51130803Smarcel 52130803Smarcel/* Mapping between the general-purpose registers in `struct reg' 53130803Smarcel format and GDB's register cache layout. */ 54130803Smarcel 55130803Smarcel/* From <machine/reg.h>. */ 56130803Smarcelint amd64nbsd_r_reg_offset[] = 57130803Smarcel{ 58130803Smarcel 14 * 8, /* %rax */ 59130803Smarcel 13 * 8, /* %rbx */ 60130803Smarcel 3 * 8, /* %rcx */ 61130803Smarcel 2 * 8, /* %rdx */ 62130803Smarcel 1 * 8, /* %rsi */ 63130803Smarcel 0 * 8, /* %rdi */ 64130803Smarcel 12 * 8, /* %rbp */ 65130803Smarcel 24 * 8, /* %rsp */ 66130803Smarcel 4 * 8, /* %r8 .. */ 67130803Smarcel 5 * 8, 68130803Smarcel 6 * 8, 69130803Smarcel 7 * 8, 70130803Smarcel 8 * 8, 71130803Smarcel 9 * 8, 72130803Smarcel 10 * 8, 73130803Smarcel 11 * 8, /* ... %r15 */ 74130803Smarcel 21 * 8, /* %rip */ 75130803Smarcel 23 * 8, /* %eflags */ 76130803Smarcel 22 * 8, /* %cs */ 77130803Smarcel 25 * 8, /* %ss */ 78130803Smarcel 18 * 8, /* %ds */ 79130803Smarcel 17 * 8, /* %es */ 80130803Smarcel 16 * 8, /* %fs */ 81130803Smarcel 15 * 8 /* %gs */ 82130803Smarcel}; 83130803Smarcel 84130803Smarcelstatic void 85130803Smarcelamd64nbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) 86130803Smarcel{ 87130803Smarcel struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); 88130803Smarcel int *sc_reg_offset; 89130803Smarcel int i; 90130803Smarcel 91130803Smarcel /* Initialize general-purpose register set details first. */ 92130803Smarcel tdep->gregset_reg_offset = amd64nbsd_r_reg_offset; 93130803Smarcel tdep->gregset_num_regs = ARRAY_SIZE (amd64nbsd_r_reg_offset); 94130803Smarcel tdep->sizeof_gregset = 26 * 8; 95130803Smarcel 96130803Smarcel amd64_init_abi (info, gdbarch); 97130803Smarcel 98130803Smarcel tdep->jb_pc_offset = 7 * 8; 99130803Smarcel 100130803Smarcel /* NetBSD has its own convention for signal trampolines. */ 101130803Smarcel set_gdbarch_pc_in_sigtramp (gdbarch, nbsd_pc_in_sigtramp); 102130803Smarcel tdep->sigcontext_addr = amd64nbsd_sigcontext_addr; 103130803Smarcel 104130803Smarcel /* Initialize the array with register offsets in `struct 105130803Smarcel sigcontext'. This `struct sigcontext' has an sc_mcontext member 106130803Smarcel at offset 32, and in <machine/reg.h> we have an explicit comment 107130803Smarcel saying that `struct reg' is the same as mcontext.__gregs. */ 108130803Smarcel tdep->sc_num_regs = ARRAY_SIZE (amd64nbsd_r_reg_offset); 109130803Smarcel tdep->sc_reg_offset = XCALLOC (tdep->sc_num_regs, int); 110130803Smarcel for (i = 0; i < tdep->sc_num_regs; i++) 111130803Smarcel { 112130803Smarcel if (amd64nbsd_r_reg_offset[i] < 0) 113130803Smarcel tdep->sc_reg_offset[i] = -1; 114130803Smarcel else 115130803Smarcel tdep->sc_reg_offset[i] = 32 + amd64nbsd_r_reg_offset[i]; 116130803Smarcel } 117130803Smarcel 118130803Smarcel /* NetBSD uses SVR4-style shared libraries. */ 119130803Smarcel set_solib_svr4_fetch_link_map_offsets 120130803Smarcel (gdbarch, svr4_lp64_fetch_link_map_offsets); 121130803Smarcel} 122130803Smarcel 123130803Smarcel 124130803Smarcel/* Provide a prototype to silence -Wmissing-prototypes. */ 125130803Smarcelvoid _initialize_amd64nbsd_tdep (void); 126130803Smarcel 127130803Smarcelvoid 128130803Smarcel_initialize_amd64nbsd_ndep (void) 129130803Smarcel{ 130130803Smarcel /* The NetBSD/amd64 native dependent code makes this assumption. */ 131130803Smarcel gdb_assert (ARRAY_SIZE (amd64nbsd_r_reg_offset) == AMD64_NUM_GREGS); 132130803Smarcel 133130803Smarcel gdbarch_register_osabi (bfd_arch_i386, bfd_mach_x86_64, 134130803Smarcel GDB_OSABI_NETBSD_ELF, amd64nbsd_init_abi); 135130803Smarcel} 136