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345bd07cce
I would like to be able to use non-trivial types in gdbarch_tdep types. This is not possible at the moment (in theory), because of the one definition rule. To allow it, rename all gdbarch_tdep types to <arch>_gdbarch_tdep, and make them inherit from a gdbarch_tdep base class. The inheritance is necessary to be able to pass pointers to all these <arch>_gdbarch_tdep objects to gdbarch_alloc, which takes a pointer to gdbarch_tdep. These objects are never deleted through a base class pointer, so I didn't include a virtual destructor. In the future, if gdbarch objects deletable, I could imagine that the gdbarch_tdep objects could become owned by the gdbarch objects, and then it would become useful to have a virtual destructor (so that the gdbarch object can delete the owned gdbarch_tdep object). But that's not necessary right now. It turns out that RISC-V already has a gdbarch_tdep that is non-default-constructible, so that provides a good motivation for this change. Most changes are fairly straightforward, mostly needing to add some casts all over the place. There is however the xtensa architecture, doing its own little weird thing to define its gdbarch_tdep. I did my best to adapt it, but I can't test those changes. Change-Id: Ic001903f91ddd106bd6ca09a79dabe8df2d69f3b
126 lines
3.5 KiB
C
126 lines
3.5 KiB
C
/* Darwin support for GDB, the GNU debugger.
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Copyright (C) 1997-2021 Free Software Foundation, Inc.
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Contributed by Apple Computer, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "frame.h"
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#include "inferior.h"
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#include "gdbcore.h"
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#include "target.h"
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#include "symtab.h"
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#include "regcache.h"
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#include "objfiles.h"
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#include "i387-tdep.h"
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#include "gdbsupport/x86-xstate.h"
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#include "amd64-tdep.h"
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#include "osabi.h"
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#include "ui-out.h"
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#include "amd64-darwin-tdep.h"
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#include "i386-darwin-tdep.h"
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#include "solib.h"
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#include "solib-darwin.h"
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#include "dwarf2/frame.h"
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/* Offsets into the struct x86_thread_state64 where we'll find the saved regs.
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From <mach/i386/thread_status.h> and amd64-tdep.h. */
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int amd64_darwin_thread_state_reg_offset[] =
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{
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0 * 8, /* %rax */
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1 * 8, /* %rbx */
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2 * 8, /* %rcx */
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3 * 8, /* %rdx */
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5 * 8, /* %rsi */
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4 * 8, /* %rdi */
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6 * 8, /* %rbp */
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7 * 8, /* %rsp */
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8 * 8, /* %r8 ... */
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9 * 8,
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10 * 8,
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11 * 8,
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12 * 8,
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13 * 8,
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14 * 8,
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15 * 8, /* ... %r15 */
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16 * 8, /* %rip */
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17 * 8, /* %rflags */
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18 * 8, /* %cs */
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-1, /* %ss */
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-1, /* %ds */
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-1, /* %es */
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19 * 8, /* %fs */
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20 * 8 /* %gs */
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};
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const int amd64_darwin_thread_state_num_regs =
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ARRAY_SIZE (amd64_darwin_thread_state_reg_offset);
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/* Assuming THIS_FRAME is a Darwin sigtramp routine, return the
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address of the associated sigcontext structure. */
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static CORE_ADDR
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amd64_darwin_sigcontext_addr (struct frame_info *this_frame)
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{
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struct gdbarch *gdbarch = get_frame_arch (this_frame);
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enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
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CORE_ADDR rbx;
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gdb_byte buf[8];
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/* A pointer to the ucontext is passed as the fourth argument
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to the signal handler, which is saved in rbx. */
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get_frame_register (this_frame, AMD64_RBX_REGNUM, buf);
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rbx = extract_unsigned_integer (buf, 8, byte_order);
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/* The pointer to mcontext is at offset 48. */
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read_memory (rbx + 48, buf, 8);
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/* First register (rax) is at offset 16. */
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return extract_unsigned_integer (buf, 8, byte_order) + 16;
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}
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static void
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x86_darwin_init_abi_64 (struct gdbarch_info info, struct gdbarch *gdbarch)
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{
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i386_gdbarch_tdep *tdep = (i386_gdbarch_tdep *) gdbarch_tdep (gdbarch);
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amd64_init_abi (info, gdbarch,
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amd64_target_description (X86_XSTATE_SSE_MASK, true));
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tdep->struct_return = reg_struct_return;
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dwarf2_frame_set_signal_frame_p (gdbarch, darwin_dwarf_signal_frame_p);
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tdep->sigtramp_p = i386_sigtramp_p;
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tdep->sigcontext_addr = amd64_darwin_sigcontext_addr;
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tdep->sc_reg_offset = amd64_darwin_thread_state_reg_offset;
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tdep->sc_num_regs = amd64_darwin_thread_state_num_regs;
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tdep->jb_pc_offset = 56;
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set_solib_ops (gdbarch, &darwin_so_ops);
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}
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void _initialize_amd64_darwin_tdep ();
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void
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_initialize_amd64_darwin_tdep ()
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{
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gdbarch_register_osabi (bfd_arch_i386, bfd_mach_x86_64,
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GDB_OSABI_DARWIN, x86_darwin_init_abi_64);
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}
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