| 1 | /* Target-dependent code for FreeBSD/amd64. |
| 2 | |
| 3 | Copyright 2003 Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GDB. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 59 Temple Place - Suite 330, |
| 20 | Boston, MA 02111-1307, USA. */ |
| 21 | |
| 22 | #include "defs.h" |
| 23 | #include "arch-utils.h" |
| 24 | #include "frame.h" |
| 25 | #include "gdbcore.h" |
| 26 | #include "regcache.h" |
| 27 | #include "osabi.h" |
| 28 | |
| 29 | #include "gdb_string.h" |
| 30 | |
| 31 | #include "x86-64-tdep.h" |
| 32 | |
| 33 | /* Support for signal handlers. */ |
| 34 | |
| 35 | /* Assuming NEXT_FRAME is for a frame following a BSD sigtramp |
| 36 | routine, return the address of the associated sigcontext structure. */ |
| 37 | |
| 38 | static CORE_ADDR |
| 39 | amd64fbsd_sigcontext_addr (struct frame_info *next_frame) |
| 40 | { |
| 41 | CORE_ADDR sp; |
| 42 | |
| 43 | /* The `struct sigcontext' (which really is an `ucontext_t' on |
| 44 | FreeBSD/amd64) lives at a fixed offset in the signal frame. See |
| 45 | <machine/sigframe.h>. */ |
| 46 | sp = frame_unwind_register_unsigned (next_frame, X86_64_RSP_REGNUM); |
| 47 | return sp + 16; |
| 48 | } |
| 49 | \f |
| 50 | /* FreeBSD 5.1-RELEASE or later. */ |
| 51 | |
| 52 | /* Mapping between the general-purpose registers in `struct reg' |
| 53 | format and GDB's register cache layout. |
| 54 | |
| 55 | Note that some registers are 32-bit, but since we're little-endian |
| 56 | we get away with that. */ |
| 57 | |
| 58 | /* From <machine/reg.h>. */ |
| 59 | static int amd64fbsd_r_reg_offset[] = |
| 60 | { |
| 61 | 14 * 8, 11 * 8, /* %rax, %rbx */ |
| 62 | 13 * 8, 12 * 8, /* %rcx, %rdx */ |
| 63 | 9 * 8, 8 * 8, /* %rsi, %rdi */ |
| 64 | 10 * 8, 20 * 8, /* %rbp, %rsp */ |
| 65 | 7 * 8, 6 * 8, 5 * 8, 4 * 8, /* %r8 ... */ |
| 66 | 3 * 8, 2 * 8, 1 * 8, 0 * 8, /* ... %r15 */ |
| 67 | 17 * 8, 19 * 8, /* %rip, %eflags */ |
| 68 | -1, -1, /* %ds, %es */ |
| 69 | -1, -1 /* %fs, %gs */ |
| 70 | }; |
| 71 | |
| 72 | /* Location of the signal trampoline. */ |
| 73 | CORE_ADDR amd64fbsd_sigtramp_start = 0x7fffffffffc0; |
| 74 | CORE_ADDR amd64fbsd_sigtramp_end = 0x7fffffffffe0; |
| 75 | |
| 76 | /* From <machine/signal.h>. */ |
| 77 | int amd64fbsd_sc_reg_offset[X86_64_NUM_GREGS] = |
| 78 | { |
| 79 | 24 + 6 * 8, /* %rax */ |
| 80 | 24 + 7 * 8, /* %rbx */ |
| 81 | 24 + 3 * 8, /* %rcx */ |
| 82 | 24 + 2 * 8, /* %rdx */ |
| 83 | 24 + 1 * 8, /* %rsi */ |
| 84 | 24 + 0 * 8, /* %rdi */ |
| 85 | 24 + 8 * 8, /* %rbp */ |
| 86 | 24 + 21 * 8, /* %rsp */ |
| 87 | 24 + 4 * 8, /* %r8 */ |
| 88 | 24 + 5 * 8, /* %r9 */ |
| 89 | 24 + 9 * 8, /* %r10 */ |
| 90 | 24 + 10 * 8, /* %r11 */ |
| 91 | 24 + 11 * 8, /* %r12 */ |
| 92 | 24 + 12 * 8, /* %r13 */ |
| 93 | 24 + 13 * 8, /* %r14 */ |
| 94 | 24 + 14 * 8, /* %r15 */ |
| 95 | 24 + 18 * 8, /* %rip */ |
| 96 | 24 + 20 * 8, /* %eflags */ |
| 97 | -1, /* %ds */ |
| 98 | -1, /* %es */ |
| 99 | -1, /* %fs */ |
| 100 | -1 /* %gs */ |
| 101 | }; |
| 102 | |
| 103 | void |
| 104 | amd64fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) |
| 105 | { |
| 106 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 107 | |
| 108 | /* Obviously FreeBSD is BSD-based. */ |
| 109 | i386bsd_init_abi (info, gdbarch); |
| 110 | |
| 111 | tdep->gregset_reg_offset = amd64fbsd_r_reg_offset; |
| 112 | tdep->gregset_num_regs = ARRAY_SIZE (amd64fbsd_r_reg_offset); |
| 113 | tdep->sizeof_gregset = 22 * 8; |
| 114 | |
| 115 | x86_64_init_abi (info, gdbarch); |
| 116 | |
| 117 | tdep->sigtramp_start = amd64fbsd_sigtramp_start; |
| 118 | tdep->sigtramp_end = amd64fbsd_sigtramp_end; |
| 119 | tdep->sigcontext_addr = amd64fbsd_sigcontext_addr; |
| 120 | tdep->sc_reg_offset = amd64fbsd_sc_reg_offset; |
| 121 | tdep->sc_num_regs = ARRAY_SIZE (amd64fbsd_sc_reg_offset); |
| 122 | } |
| 123 | \f |
| 124 | |
| 125 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
| 126 | void _initialize_amd64fbsd_tdep (void); |
| 127 | |
| 128 | void |
| 129 | _initialize_amd64fbsd_tdep (void) |
| 130 | { |
| 131 | gdbarch_register_osabi (bfd_arch_i386, bfd_mach_x86_64, |
| 132 | GDB_OSABI_FREEBSD_ELF, amd64fbsd_init_abi); |
| 133 | } |