/* Darwin support for GDB, the GNU debugger. Copyright (C) 1997-2019 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) { gdbarch_register_osabi (bfd_arch_i386, bfd_mach_x86_64, GDB_OSABI_DARWIN, x86_darwin_init_abi_64); }