diff options
Diffstat (limited to 'gdb/shnbsd-tdep.c')
| -rw-r--r-- | gdb/shnbsd-tdep.c | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/gdb/shnbsd-tdep.c b/gdb/shnbsd-tdep.c new file mode 100644 index 00000000000..a185b51a96f --- /dev/null +++ b/gdb/shnbsd-tdep.c @@ -0,0 +1,235 @@ +/* Target-dependent code for SuperH running NetBSD, for GDB. + Copyright 2002 Free Software Foundation, Inc. + Contributed by Wasabi Systems, 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 2 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, write to the Free Software + Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include "defs.h" +#include "gdbcore.h" +#include "regcache.h" +#include "value.h" +#include "solib-svr4.h" + +#include "shnbsd-tdep.h" + +/* Convert an r0-r15 register number into an offset into a ptrace + register structure. */ +static const int regmap[] = +{ + (20 * 4), /* r0 */ + (19 * 4), /* r1 */ + (18 * 4), /* r2 */ + (17 * 4), /* r3 */ + (16 * 4), /* r4 */ + (15 * 4), /* r5 */ + (14 * 4), /* r6 */ + (13 * 4), /* r7 */ + (12 * 4), /* r8 */ + (11 * 4), /* r9 */ + (10 * 4), /* r10 */ + ( 9 * 4), /* r11 */ + ( 8 * 4), /* r12 */ + ( 7 * 4), /* r13 */ + ( 6 * 4), /* r14 */ + ( 5 * 4), /* r15 */ +}; + +#define SIZEOF_STRUCT_REG (21 * 4) + +void +sh_nbsd_supply_registers (char *regs) +{ + int regno; + + for (regno = R0_REGNUM; regno <= (R0_REGNUM + 15); regno++) + supply_register (regno, regs + regmap[regno - R0_REGNUM]); + + supply_register (PC_REGNUM, regs + (0 * 4)); + supply_register (SR_REGNUM, regs + (1 * 4)); + supply_register (PR_REGNUM, regs + (2 * 4)); + supply_register (MACH_REGNUM, regs + (3 * 4)); + supply_register (MACL_REGNUM, regs + (4 * 4)); +} + +void +sh_nbsd_supply_register (char *regs, int regno) +{ + if (regno == -1) + sh_nbsd_supply_registers (regs); + + if (regno == PC_REGNUM) + supply_register (PC_REGNUM, regs + (0 * 4)); + else if (regno == SR_REGNUM) + supply_register (SR_REGNUM, regs + (1 * 4)); + else if (regno == PR_REGNUM) + supply_register (PR_REGNUM, regs + (2 * 4)); + else if (regno == MACH_REGNUM) + supply_register (MACH_REGNUM, regs + (3 * 4)); + else if (regno == MACL_REGNUM) + supply_register (MACL_REGNUM, regs + (4 * 4)); + else if (regno >= R0_REGNUM && regno <= (R0_REGNUM + 15)) + supply_register (regno, regs + regmap[regno - R0_REGNUM]); +} + +void +sh_nbsd_fill_registers (char *regs) +{ + int regno; + + for (regno = R0_REGNUM; regno <= (R0_REGNUM + 15); regno++) + regcache_collect (regno, regs + regmap[regno - R0_REGNUM]); + + regcache_collect (PC_REGNUM, regs + (0 * 4)); + regcache_collect (SR_REGNUM, regs + (1 * 4)); + regcache_collect (PR_REGNUM, regs + (2 * 4)); + regcache_collect (MACH_REGNUM, regs + (3 * 4)); + regcache_collect (MACL_REGNUM, regs + (4 * 4)); +} + +void +sh_nbsd_fill_register (char *regs, int regno) +{ + if (regno == -1) + sh_nbsd_fill_registers (regs); + + if (regno == PC_REGNUM) + regcache_collect (PC_REGNUM, regs + (0 * 4)); + else if (regno == SR_REGNUM) + regcache_collect (SR_REGNUM, regs + (1 * 4)); + else if (regno == PR_REGNUM) + regcache_collect (PR_REGNUM, regs + (2 * 4)); + else if (regno == MACH_REGNUM) + regcache_collect (MACH_REGNUM, regs + (3 * 4)); + else if (regno == MACL_REGNUM) + regcache_collect (MACL_REGNUM, regs + (4 * 4)); + else if (regno >= R0_REGNUM && regno <= (R0_REGNUM + 15)) + regcache_collect (regno, regs + regmap[regno - R0_REGNUM]); +} + +/* Fetch (and possibly build) an appropriate link_map_offsets + structure for NetBSD/sh targets using the struct offsets + defined in <link.h> (but without actual reference to that file). + + This makes it possible to access NetBSD/sh shared libraries + from a GDB that was not built on a NetBSD/sh host (for cross + debugging). */ + +static struct link_map_offsets * +sh_nbsd_solib_svr4_fetch_link_map_offsets (void) +{ + static struct link_map_offsets lmo; + static struct link_map_offsets *lmp = NULL; + + if (lmp == NULL) + { + lmp = &lmo; + + lmo.r_debug_size = 16; + + lmo.r_map_offset = 4; + lmo.r_map_size = 4; + + lmo.link_map_size = 20; + + lmo.l_addr_offset = 0; + lmo.l_addr_size = 4; + + lmo.l_name_offset = 4; + lmo.l_name_size = 4; + + lmo.l_next_offset = 12; + lmo.l_next_size = 4; + + lmo.l_prev_offset = 16; + lmo.l_prev_size = 4; + } + + return lmp; +} + +static void +fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, + int which, CORE_ADDR ignore) +{ + /* We get everything from the .reg section. */ + if (which != 0) + return; + + if (core_reg_size < SIZEOF_STRUCT_REG) + { + warning ("Wrong size register set in core file."); + return; + } + + /* Integer registers. */ + sh_nbsd_supply_registers (core_reg_sect); +} + +static void +fetch_elfcore_registers (char *core_reg_sect, unsigned core_reg_size, + int which, CORE_ADDR ignore) +{ + switch (which) + { + case 0: /* Integer registers. */ + if (core_reg_size != SIZEOF_STRUCT_REG) + warning ("Wrong size register set in core file."); + else + sh_nbsd_supply_registers (core_reg_sect); + break; + + default: + /* Don't know what kind of register request this is; just ignore it. */ + break; + } +} + +static struct core_fns sh_nbsd_core_fns = +{ + bfd_target_unknown_flavour, /* core_flavour */ + default_check_format, /* check_format */ + default_core_sniffer, /* core_sniffer */ + fetch_core_registers, /* core_read_registers */ + NULL /* next */ +}; + +static struct core_fns sh_nbsd_elfcore_fns = +{ + bfd_target_elf_flavour, /* core_flavour */ + default_check_format, /* check_format */ + default_core_sniffer, /* core_sniffer */ + fetch_elfcore_registers, /* core_read_registers */ + NULL /* next */ +}; + +static void +sh_nbsd_init_abi (struct gdbarch_info info, + struct gdbarch *gdbarch) +{ + set_solib_svr4_fetch_link_map_offsets (gdbarch, + sh_nbsd_solib_svr4_fetch_link_map_offsets); +} + +void +_initialize_sh_nbsd_tdep (void) +{ + add_core_fns (&sh_nbsd_core_fns); + add_core_fns (&sh_nbsd_elfcore_fns); + + sh_gdbarch_register_os_abi (SH_OSABI_NETBSD_ELF, sh_nbsd_init_abi); +} |