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4015edd13a
* shnbsd-nat.c: ...this. * sh-nbsd-tdep.c: Rename to... * shnbsd-tdep.c: ...this. * sh-nbsd-tdep.h: Rename to... * shnbsd-tdep.h: ...this. * config/sh/nbsd.mh: Use shnbsd-nat.o. * config/sh/nbsd.mt: Use shnbsd-tdep.o.
236 lines
6.3 KiB
C
236 lines
6.3 KiB
C
/* Target-dependent code for SuperH running NetBSD, for GDB.
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Copyright 2002 Free Software Foundation, Inc.
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Contributed by Wasabi Systems, 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 2 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, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "defs.h"
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#include "gdbcore.h"
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#include "regcache.h"
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#include "value.h"
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#include "solib-svr4.h"
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#include "shnbsd-tdep.h"
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/* Convert an r0-r15 register number into an offset into a ptrace
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register structure. */
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static const int regmap[] =
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{
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(20 * 4), /* r0 */
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(19 * 4), /* r1 */
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(18 * 4), /* r2 */
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(17 * 4), /* r3 */
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(16 * 4), /* r4 */
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(15 * 4), /* r5 */
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(14 * 4), /* r6 */
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(13 * 4), /* r7 */
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(12 * 4), /* r8 */
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(11 * 4), /* r9 */
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(10 * 4), /* r10 */
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( 9 * 4), /* r11 */
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( 8 * 4), /* r12 */
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( 7 * 4), /* r13 */
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( 6 * 4), /* r14 */
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( 5 * 4), /* r15 */
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};
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#define SIZEOF_STRUCT_REG (21 * 4)
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void
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sh_nbsd_supply_registers (char *regs)
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{
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int regno;
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for (regno = R0_REGNUM; regno <= (R0_REGNUM + 15); regno++)
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supply_register (regno, regs + regmap[regno - R0_REGNUM]);
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supply_register (PC_REGNUM, regs + (0 * 4));
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supply_register (SR_REGNUM, regs + (1 * 4));
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supply_register (PR_REGNUM, regs + (2 * 4));
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supply_register (MACH_REGNUM, regs + (3 * 4));
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supply_register (MACL_REGNUM, regs + (4 * 4));
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}
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void
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sh_nbsd_supply_register (char *regs, int regno)
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{
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if (regno == -1)
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sh_nbsd_supply_registers (regs);
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if (regno == PC_REGNUM)
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supply_register (PC_REGNUM, regs + (0 * 4));
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else if (regno == SR_REGNUM)
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supply_register (SR_REGNUM, regs + (1 * 4));
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else if (regno == PR_REGNUM)
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supply_register (PR_REGNUM, regs + (2 * 4));
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else if (regno == MACH_REGNUM)
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supply_register (MACH_REGNUM, regs + (3 * 4));
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else if (regno == MACL_REGNUM)
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supply_register (MACL_REGNUM, regs + (4 * 4));
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else if (regno >= R0_REGNUM && regno <= (R0_REGNUM + 15))
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supply_register (regno, regs + regmap[regno - R0_REGNUM]);
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}
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void
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sh_nbsd_fill_registers (char *regs)
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{
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int regno;
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for (regno = R0_REGNUM; regno <= (R0_REGNUM + 15); regno++)
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regcache_collect (regno, regs + regmap[regno - R0_REGNUM]);
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regcache_collect (PC_REGNUM, regs + (0 * 4));
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regcache_collect (SR_REGNUM, regs + (1 * 4));
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regcache_collect (PR_REGNUM, regs + (2 * 4));
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regcache_collect (MACH_REGNUM, regs + (3 * 4));
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regcache_collect (MACL_REGNUM, regs + (4 * 4));
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}
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void
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sh_nbsd_fill_register (char *regs, int regno)
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{
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if (regno == -1)
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sh_nbsd_fill_registers (regs);
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if (regno == PC_REGNUM)
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regcache_collect (PC_REGNUM, regs + (0 * 4));
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else if (regno == SR_REGNUM)
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regcache_collect (SR_REGNUM, regs + (1 * 4));
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else if (regno == PR_REGNUM)
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regcache_collect (PR_REGNUM, regs + (2 * 4));
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else if (regno == MACH_REGNUM)
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regcache_collect (MACH_REGNUM, regs + (3 * 4));
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else if (regno == MACL_REGNUM)
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regcache_collect (MACL_REGNUM, regs + (4 * 4));
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else if (regno >= R0_REGNUM && regno <= (R0_REGNUM + 15))
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regcache_collect (regno, regs + regmap[regno - R0_REGNUM]);
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}
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/* Fetch (and possibly build) an appropriate link_map_offsets
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structure for NetBSD/sh targets using the struct offsets
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defined in <link.h> (but without actual reference to that file).
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This makes it possible to access NetBSD/sh shared libraries
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from a GDB that was not built on a NetBSD/sh host (for cross
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debugging). */
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static struct link_map_offsets *
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sh_nbsd_solib_svr4_fetch_link_map_offsets (void)
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{
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static struct link_map_offsets lmo;
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static struct link_map_offsets *lmp = NULL;
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if (lmp == NULL)
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{
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lmp = &lmo;
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lmo.r_debug_size = 16;
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lmo.r_map_offset = 4;
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lmo.r_map_size = 4;
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lmo.link_map_size = 20;
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lmo.l_addr_offset = 0;
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lmo.l_addr_size = 4;
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lmo.l_name_offset = 4;
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lmo.l_name_size = 4;
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lmo.l_next_offset = 12;
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lmo.l_next_size = 4;
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lmo.l_prev_offset = 16;
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lmo.l_prev_size = 4;
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}
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return lmp;
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}
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static void
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fetch_core_registers (char *core_reg_sect, unsigned core_reg_size,
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int which, CORE_ADDR ignore)
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{
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/* We get everything from the .reg section. */
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if (which != 0)
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return;
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if (core_reg_size < SIZEOF_STRUCT_REG)
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{
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warning ("Wrong size register set in core file.");
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return;
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}
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/* Integer registers. */
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sh_nbsd_supply_registers (core_reg_sect);
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}
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static void
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fetch_elfcore_registers (char *core_reg_sect, unsigned core_reg_size,
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int which, CORE_ADDR ignore)
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{
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switch (which)
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{
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case 0: /* Integer registers. */
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if (core_reg_size != SIZEOF_STRUCT_REG)
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warning ("Wrong size register set in core file.");
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else
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sh_nbsd_supply_registers (core_reg_sect);
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break;
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default:
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/* Don't know what kind of register request this is; just ignore it. */
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break;
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}
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}
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static struct core_fns sh_nbsd_core_fns =
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{
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bfd_target_unknown_flavour, /* core_flavour */
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default_check_format, /* check_format */
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default_core_sniffer, /* core_sniffer */
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fetch_core_registers, /* core_read_registers */
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NULL /* next */
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};
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static struct core_fns sh_nbsd_elfcore_fns =
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{
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bfd_target_elf_flavour, /* core_flavour */
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default_check_format, /* check_format */
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default_core_sniffer, /* core_sniffer */
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fetch_elfcore_registers, /* core_read_registers */
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NULL /* next */
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};
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static void
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sh_nbsd_init_abi (struct gdbarch_info info,
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struct gdbarch *gdbarch)
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{
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set_solib_svr4_fetch_link_map_offsets (gdbarch,
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sh_nbsd_solib_svr4_fetch_link_map_offsets);
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}
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void
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_initialize_sh_nbsd_tdep (void)
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{
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add_core_fns (&sh_nbsd_core_fns);
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add_core_fns (&sh_nbsd_elfcore_fns);
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sh_gdbarch_register_os_abi (SH_OSABI_NETBSD_ELF, sh_nbsd_init_abi);
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}
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