1 /* Host-dependent code for Sun-3 for GDB, the GNU debugger.
2 Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1996, 1999, 2000, 2001
3 Free Software Foundation, Inc.
5 This file is part of GDB.
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 2 of the License, or
10 (at your option) any later version.
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.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
27 #include <sys/ptrace.h>
28 #define KERNEL /* To get floating point reg definitions */
29 #include <machine/reg.h>
31 static void fetch_core_registers (char *, unsigned, int, CORE_ADDR);
34 fetch_inferior_registers (int regno)
36 struct regs inferior_registers;
37 struct fp_status inferior_fp_registers;
41 ptrace (PTRACE_GETREGS, PIDGET (inferior_ptid),
42 (PTRACE_ARG3_TYPE) & inferior_registers);
45 ptrace (PTRACE_GETFPREGS, PIDGET (inferior_ptid),
46 (PTRACE_ARG3_TYPE) & inferior_fp_registers);
48 memcpy (registers, &inferior_registers, 16 * 4);
50 memcpy (®isters[REGISTER_BYTE (FP0_REGNUM)], &inferior_fp_registers,
51 sizeof inferior_fp_registers.fps_regs);
53 *(int *) ®isters[REGISTER_BYTE (PS_REGNUM)] = inferior_registers.r_ps;
54 *(int *) ®isters[REGISTER_BYTE (PC_REGNUM)] = inferior_registers.r_pc;
56 memcpy (®isters[REGISTER_BYTE (FPC_REGNUM)],
57 &inferior_fp_registers.fps_control,
58 sizeof inferior_fp_registers -
59 sizeof inferior_fp_registers.fps_regs);
62 /* Store our register values back into the inferior.
63 If REGNO is -1, do this for all registers.
64 Otherwise, REGNO specifies which register (so we can save time). */
67 store_inferior_registers (int regno)
69 struct regs inferior_registers;
70 struct fp_status inferior_fp_registers;
72 memcpy (&inferior_registers, registers, 16 * 4);
74 memcpy (&inferior_fp_registers, ®isters[REGISTER_BYTE (FP0_REGNUM)],
75 sizeof inferior_fp_registers.fps_regs);
77 inferior_registers.r_ps = *(int *) ®isters[REGISTER_BYTE (PS_REGNUM)];
78 inferior_registers.r_pc = *(int *) ®isters[REGISTER_BYTE (PC_REGNUM)];
81 memcpy (&inferior_fp_registers.fps_control,
82 ®isters[REGISTER_BYTE (FPC_REGNUM)],
83 sizeof inferior_fp_registers -
84 sizeof inferior_fp_registers.fps_regs);
86 ptrace (PTRACE_SETREGS, PIDGET (inferior_ptid),
87 (PTRACE_ARG3_TYPE) & inferior_registers);
89 ptrace (PTRACE_SETFPREGS, PIDGET (inferior_ptid),
90 (PTRACE_ARG3_TYPE) & inferior_fp_registers);
94 /* All of this stuff is only relevant if both host and target are sun3. */
96 /* Provide registers to GDB from a core file.
98 CORE_REG_SECT points to an array of bytes, which were obtained from
99 a core file which BFD thinks might contain register contents.
100 CORE_REG_SIZE is its size.
102 WHICH says which register set corelow suspects this is:
103 0 --- the general-purpose register set
104 2 --- the floating-point register set
106 REG_ADDR isn't used. */
109 fetch_core_registers (char *core_reg_sect, unsigned core_reg_size,
110 int which, CORE_ADDR reg_addr)
112 struct regs *regs = (struct regs *) core_reg_sect;
116 if (core_reg_size < sizeof (struct regs))
117 error ("Can't find registers in core file");
119 memcpy (registers, (char *) regs, 16 * 4);
120 supply_register (PS_REGNUM, (char *) ®s->r_ps);
121 supply_register (PC_REGNUM, (char *) ®s->r_pc);
127 #define fpustruct ((struct fpu *) core_reg_sect)
129 if (core_reg_size >= sizeof (struct fpu))
133 memcpy (®isters[REGISTER_BYTE (FP0_REGNUM)],
134 fpustruct->f_fpstatus.fps_regs,
135 sizeof fpustruct->f_fpstatus.fps_regs);
136 memcpy (®isters[REGISTER_BYTE (FPC_REGNUM)],
137 &fpustruct->f_fpstatus.fps_control,
138 sizeof fpustruct->f_fpstatus -
139 sizeof fpustruct->f_fpstatus.fps_regs);
143 fprintf_unfiltered (gdb_stderr,
144 "Couldn't read float regs from core file\n");
149 /* Register that we are able to handle sun3 core file formats.
150 FIXME: is this really bfd_target_unknown_flavour? */
152 static struct core_fns sun3_core_fns =
154 bfd_target_unknown_flavour, /* core_flavour */
155 default_check_format, /* check_format */
156 default_core_sniffer, /* core_sniffer */
157 fetch_core_registers, /* core_read_registers */
162 _initialize_core_sun3 (void)
164 add_core_fns (&sun3_core_fns);