/* Target-dependent code for NetBSD/amd64. Copyright 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include "defs.h" #include "arch-utils.h" #include "frame.h" #include "gdbcore.h" #include "osabi.h" #include "symtab.h" #include "gdb_assert.h" #include "amd64-tdep.h" #include "nbsd-tdep.h" #include "solib-svr4.h" /* Support for signal handlers. */ /* Return whether the frame preceding NEXT_FRAME corresponds to a NetBSD sigtramp routine. */ static int amd64nbsd_sigtramp_p (struct frame_info *next_frame) { CORE_ADDR pc = frame_pc_unwind (next_frame); char *name; find_pc_partial_function (pc, &name, NULL, NULL); return nbsd_pc_in_sigtramp (pc, name); } /* Assuming NEXT_FRAME is preceded by a frame corresponding to a NetBSD sigtramp routine, return the address of the associated mcontext structure. */ static CORE_ADDR amd64nbsd_mcontext_addr (struct frame_info *next_frame) { CORE_ADDR addr; /* The register %r15 points at `struct ucontext' upon entry of a signal trampoline. */ addr = frame_unwind_register_unsigned (next_frame, AMD64_R15_REGNUM); /* The mcontext structure lives as offset 56 in `struct ucontext'. */ return addr + 56; } /* NetBSD 2.0 or later. */ /* Mapping between the general-purpose registers in `struct reg' format and GDB's register cache layout. */ /* From <machine/reg.h>. */ int amd64nbsd_r_reg_offset[] = { 14 * 8, /* %rax */ 13 * 8, /* %rbx */ 3 * 8, /* %rcx */ 2 * 8, /* %rdx */ 1 * 8, /* %rsi */ 0 * 8, /* %rdi */ 12 * 8, /* %rbp */ 24 * 8, /* %rsp */ 4 * 8, /* %r8 .. */ 5 * 8, 6 * 8, 7 * 8, 8 * 8, 9 * 8, 10 * 8, 11 * 8, /* ... %r15 */ 21 * 8, /* %rip */ 23 * 8, /* %eflags */ 22 * 8, /* %cs */ 25 * 8, /* %ss */ 18 * 8, /* %ds */ 17 * 8, /* %es */ 16 * 8, /* %fs */ 15 * 8 /* %gs */ }; static void amd64nbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) { struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); /* Initialize general-purpose register set details first. */ tdep->gregset_reg_offset = amd64nbsd_r_reg_offset; tdep->gregset_num_regs = ARRAY_SIZE (amd64nbsd_r_reg_offset); tdep->sizeof_gregset = 26 * 8; amd64_init_abi (info, gdbarch); tdep->jb_pc_offset = 7 * 8; /* NetBSD has its own convention for signal trampolines. */ tdep->sigtramp_p = amd64nbsd_sigtramp_p; tdep->sigcontext_addr = amd64nbsd_mcontext_addr; tdep->sc_reg_offset = amd64nbsd_r_reg_offset; tdep->sc_num_regs = ARRAY_SIZE (amd64nbsd_r_reg_offset); /* NetBSD uses SVR4-style shared libraries. */ set_solib_svr4_fetch_link_map_offsets (gdbarch, svr4_lp64_fetch_link_map_offsets); } /* Provide a prototype to silence -Wmissing-prototypes. */ void _initialize_amd64nbsd_tdep (void); void _initialize_amd64nbsd_ndep (void) { /* The NetBSD/amd64 native dependent code makes this assumption. */ gdb_assert (ARRAY_SIZE (amd64nbsd_r_reg_offset) == AMD64_NUM_GREGS); gdbarch_register_osabi (bfd_arch_i386, bfd_mach_x86_64, GDB_OSABI_NETBSD_ELF, amd64nbsd_init_abi); }