| /* Target-dependent code for NetBSD/amd64. |
| |
| Copyright (C) 2003-2024 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 3 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, see <http://www.gnu.org/licenses/>. */ |
| |
| #include "arch-utils.h" |
| #include "frame.h" |
| #include "gdbcore.h" |
| #include "osabi.h" |
| #include "symtab.h" |
| |
| #include "amd64-tdep.h" |
| #include "gdbsupport/x86-xstate.h" |
| #include "netbsd-tdep.h" |
| #include "solib-svr4.h" |
| |
| /* Support for signal handlers. */ |
| |
| /* Return whether THIS_FRAME corresponds to a NetBSD sigtramp |
| routine. */ |
| |
| static int |
| amd64nbsd_sigtramp_p (const frame_info_ptr &this_frame) |
| { |
| CORE_ADDR pc = get_frame_pc (this_frame); |
| const char *name; |
| |
| find_pc_partial_function (pc, &name, NULL, NULL); |
| return nbsd_pc_in_sigtramp (pc, name); |
| } |
| |
| /* Assuming THIS_FRAME corresponds to a NetBSD sigtramp routine, |
| return the address of the associated mcontext structure. */ |
| |
| static CORE_ADDR |
| amd64nbsd_mcontext_addr (const frame_info_ptr &this_frame) |
| { |
| CORE_ADDR addr; |
| |
| /* The register %r15 points at `struct ucontext' upon entry of a |
| signal trampoline. */ |
| addr = get_frame_register_unsigned (this_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) |
| { |
| i386_gdbarch_tdep *tdep = gdbarch_tdep<i386_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, |
| amd64_target_description (X86_XSTATE_SSE_MASK, true)); |
| nbsd_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); |
| } |
| |
| void _initialize_amd64nbsd_tdep (); |
| void |
| _initialize_amd64nbsd_tdep () |
| { |
| /* 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, amd64nbsd_init_abi); |
| } |