[deliverable/binutils-gdb.git] / gdb / amd64nbsd-tdep.c

/* Target-dependent code for NetBSD/amd64.

   Copyright (C) 2003-2015 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 "defs.h"
#include "arch-utils.h"
#include "frame.h"
#include "gdbcore.h"
#include "osabi.h"
#include "symtab.h"

#include "amd64-tdep.h"
#include "nbsd-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 (struct frame_info *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 (struct frame_info *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;
}
\f
/* 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)
{
  struct gdbarch_tdep *tdep = 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);

  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);
}
\f

/* Provide a prototype to silence -Wmissing-prototypes.  */
void _initialize_amd64nbsd_tdep (void);

void
_initialize_amd64nbsd_tdep (void)
{
  /* 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_ELF, amd64nbsd_init_abi);
}
Commit	Line	Data
	1	/* Target-dependent code for NetBSD/amd64.
	2
	3	Copyright (C) 2003-2015 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 3 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, see <http://www.gnu.org/licenses/>. */
	19
	20	#include "defs.h"
	21	#include "arch-utils.h"
	22	#include "frame.h"
	23	#include "gdbcore.h"
	24	#include "osabi.h"
	25	#include "symtab.h"
	26
	27	#include "amd64-tdep.h"
	28	#include "nbsd-tdep.h"
	29	#include "solib-svr4.h"
	30
	31	/* Support for signal handlers. */
	32
	33	/* Return whether THIS_FRAME corresponds to a NetBSD sigtramp
	34	routine. */
	35
	36	static int
	37	amd64nbsd_sigtramp_p (struct frame_info *this_frame)
	38	{
	39	CORE_ADDR pc = get_frame_pc (this_frame);
	40	const char *name;
	41
	42	find_pc_partial_function (pc, &name, NULL, NULL);
	43	return nbsd_pc_in_sigtramp (pc, name);
	44	}
	45
	46	/* Assuming THIS_FRAME corresponds to a NetBSD sigtramp routine,
	47	return the address of the associated mcontext structure. */
	48
	49	static CORE_ADDR
	50	amd64nbsd_mcontext_addr (struct frame_info *this_frame)
	51	{
	52	CORE_ADDR addr;
	53
	54	/* The register %r15 points at `struct ucontext' upon entry of a
	55	signal trampoline. */
	56	addr = get_frame_register_unsigned (this_frame, AMD64_R15_REGNUM);
	57
	58	/* The mcontext structure lives as offset 56 in `struct ucontext'. */
	59	return addr + 56;
	60	}
	61	\f
	62	/* NetBSD 2.0 or later. */
	63
	64	/* Mapping between the general-purpose registers in `struct reg'
	65	format and GDB's register cache layout. */
	66
	67	/* From <machine/reg.h>. */
	68	int amd64nbsd_r_reg_offset[] =
	69	{
	70	14 * 8, /* %rax */
	71	13 * 8, /* %rbx */
	72	3 * 8, /* %rcx */
	73	2 * 8, /* %rdx */
	74	1 * 8, /* %rsi */
	75	0 * 8, /* %rdi */
	76	12 * 8, /* %rbp */
	77	24 * 8, /* %rsp */
	78	4 * 8, /* %r8 .. */
	79	5 * 8,
	80	6 * 8,
	81	7 * 8,
	82	8 * 8,
	83	9 * 8,
	84	10 * 8,
	85	11 * 8, /* ... %r15 */
	86	21 * 8, /* %rip */
	87	23 * 8, /* %eflags */
	88	22 * 8, /* %cs */
	89	25 * 8, /* %ss */
	90	18 * 8, /* %ds */
	91	17 * 8, /* %es */
	92	16 * 8, /* %fs */
	93	15 * 8 /* %gs */
	94	};
	95
	96	static void
	97	amd64nbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
	98	{
	99	struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
	100
	101	/* Initialize general-purpose register set details first. */
	102	tdep->gregset_reg_offset = amd64nbsd_r_reg_offset;
	103	tdep->gregset_num_regs = ARRAY_SIZE (amd64nbsd_r_reg_offset);
	104	tdep->sizeof_gregset = 26 * 8;
	105
	106	amd64_init_abi (info, gdbarch);
	107
	108	tdep->jb_pc_offset = 7 * 8;
	109
	110	/* NetBSD has its own convention for signal trampolines. */
	111	tdep->sigtramp_p = amd64nbsd_sigtramp_p;
	112	tdep->sigcontext_addr = amd64nbsd_mcontext_addr;
	113	tdep->sc_reg_offset = amd64nbsd_r_reg_offset;
	114	tdep->sc_num_regs = ARRAY_SIZE (amd64nbsd_r_reg_offset);
	115
	116	/* NetBSD uses SVR4-style shared libraries. */
	117	set_solib_svr4_fetch_link_map_offsets
	118	(gdbarch, svr4_lp64_fetch_link_map_offsets);
	119	}
	120	\f
	121
	122	/* Provide a prototype to silence -Wmissing-prototypes. */
	123	void _initialize_amd64nbsd_tdep (void);
	124
	125	void
	126	_initialize_amd64nbsd_tdep (void)
	127	{
	128	/* The NetBSD/amd64 native dependent code makes this assumption. */
	129	gdb_assert (ARRAY_SIZE (amd64nbsd_r_reg_offset) == AMD64_NUM_GREGS);
	130
	131	gdbarch_register_osabi (bfd_arch_i386, bfd_mach_x86_64,
	132	GDB_OSABI_NETBSD_ELF, amd64nbsd_init_abi);
	133	}