| /* Darwin support for GDB, the GNU debugger. |
| Copyright (C) 1997-2021 Free Software Foundation, Inc. |
| |
| Contributed by Apple Computer, 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 "defs.h" |
| #include "frame.h" |
| #include "inferior.h" |
| #include "gdbcore.h" |
| #include "target.h" |
| #include "symtab.h" |
| #include "regcache.h" |
| #include "objfiles.h" |
| |
| #include "i387-tdep.h" |
| #include "gdbsupport/x86-xstate.h" |
| #include "amd64-tdep.h" |
| #include "osabi.h" |
| #include "ui-out.h" |
| #include "amd64-darwin-tdep.h" |
| #include "i386-darwin-tdep.h" |
| #include "solib.h" |
| #include "solib-darwin.h" |
| #include "dwarf2/frame.h" |
| |
| /* Offsets into the struct x86_thread_state64 where we'll find the saved regs. |
| From <mach/i386/thread_status.h> and amd64-tdep.h. */ |
| int amd64_darwin_thread_state_reg_offset[] = |
| { |
| 0 * 8, /* %rax */ |
| 1 * 8, /* %rbx */ |
| 2 * 8, /* %rcx */ |
| 3 * 8, /* %rdx */ |
| 5 * 8, /* %rsi */ |
| 4 * 8, /* %rdi */ |
| 6 * 8, /* %rbp */ |
| 7 * 8, /* %rsp */ |
| 8 * 8, /* %r8 ... */ |
| 9 * 8, |
| 10 * 8, |
| 11 * 8, |
| 12 * 8, |
| 13 * 8, |
| 14 * 8, |
| 15 * 8, /* ... %r15 */ |
| 16 * 8, /* %rip */ |
| 17 * 8, /* %rflags */ |
| 18 * 8, /* %cs */ |
| -1, /* %ss */ |
| -1, /* %ds */ |
| -1, /* %es */ |
| 19 * 8, /* %fs */ |
| 20 * 8 /* %gs */ |
| }; |
| |
| const int amd64_darwin_thread_state_num_regs = |
| ARRAY_SIZE (amd64_darwin_thread_state_reg_offset); |
| |
| /* Assuming THIS_FRAME is a Darwin sigtramp routine, return the |
| address of the associated sigcontext structure. */ |
| |
| static CORE_ADDR |
| amd64_darwin_sigcontext_addr (struct frame_info *this_frame) |
| { |
| struct gdbarch *gdbarch = get_frame_arch (this_frame); |
| enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| CORE_ADDR rbx; |
| gdb_byte buf[8]; |
| |
| /* A pointer to the ucontext is passed as the fourth argument |
| to the signal handler, which is saved in rbx. */ |
| get_frame_register (this_frame, AMD64_RBX_REGNUM, buf); |
| rbx = extract_unsigned_integer (buf, 8, byte_order); |
| |
| /* The pointer to mcontext is at offset 48. */ |
| read_memory (rbx + 48, buf, 8); |
| |
| /* First register (rax) is at offset 16. */ |
| return extract_unsigned_integer (buf, 8, byte_order) + 16; |
| } |
| |
| static void |
| x86_darwin_init_abi_64 (struct gdbarch_info info, struct gdbarch *gdbarch) |
| { |
| struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| |
| amd64_init_abi (info, gdbarch, |
| amd64_target_description (X86_XSTATE_SSE_MASK, true)); |
| |
| tdep->struct_return = reg_struct_return; |
| |
| dwarf2_frame_set_signal_frame_p (gdbarch, darwin_dwarf_signal_frame_p); |
| |
| tdep->sigtramp_p = i386_sigtramp_p; |
| tdep->sigcontext_addr = amd64_darwin_sigcontext_addr; |
| tdep->sc_reg_offset = amd64_darwin_thread_state_reg_offset; |
| tdep->sc_num_regs = amd64_darwin_thread_state_num_regs; |
| |
| tdep->jb_pc_offset = 56; |
| |
| set_solib_ops (gdbarch, &darwin_so_ops); |
| } |
| |
| void _initialize_amd64_darwin_tdep (); |
| void |
| _initialize_amd64_darwin_tdep () |
| { |
| gdbarch_register_osabi (bfd_arch_i386, bfd_mach_x86_64, |
| GDB_OSABI_DARWIN, x86_darwin_init_abi_64); |
| } |