1 /* Host-dependent code for Sun-3 for GDB, the GNU debugger.
2 Copyright 1986, 1987, 1989, 1991, 1992 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
25 #include <sys/ptrace.h>
26 #define KERNEL /* To get floating point reg definitions */
27 #include <machine/reg.h>
29 static void fetch_core_registers (char *, unsigned, int, CORE_ADDR);
32 fetch_inferior_registers (int regno)
34 struct regs inferior_registers;
35 struct fp_status inferior_fp_registers;
39 ptrace (PTRACE_GETREGS, inferior_pid,
40 (PTRACE_ARG3_TYPE) & inferior_registers);
43 ptrace (PTRACE_GETFPREGS, inferior_pid,
44 (PTRACE_ARG3_TYPE) & inferior_fp_registers);
46 memcpy (registers, &inferior_registers, 16 * 4);
48 memcpy (®isters[REGISTER_BYTE (FP0_REGNUM)], &inferior_fp_registers,
49 sizeof inferior_fp_registers.fps_regs);
51 *(int *) ®isters[REGISTER_BYTE (PS_REGNUM)] = inferior_registers.r_ps;
52 *(int *) ®isters[REGISTER_BYTE (PC_REGNUM)] = inferior_registers.r_pc;
54 memcpy (®isters[REGISTER_BYTE (FPC_REGNUM)],
55 &inferior_fp_registers.fps_control,
56 sizeof inferior_fp_registers -
57 sizeof inferior_fp_registers.fps_regs);
60 /* Store our register values back into the inferior.
61 If REGNO is -1, do this for all registers.
62 Otherwise, REGNO specifies which register (so we can save time). */
65 store_inferior_registers (int regno)
67 struct regs inferior_registers;
68 struct fp_status inferior_fp_registers;
70 memcpy (&inferior_registers, registers, 16 * 4);
72 memcpy (&inferior_fp_registers, ®isters[REGISTER_BYTE (FP0_REGNUM)],
73 sizeof inferior_fp_registers.fps_regs);
75 inferior_registers.r_ps = *(int *) ®isters[REGISTER_BYTE (PS_REGNUM)];
76 inferior_registers.r_pc = *(int *) ®isters[REGISTER_BYTE (PC_REGNUM)];
79 memcpy (&inferior_fp_registers.fps_control,
80 ®isters[REGISTER_BYTE (FPC_REGNUM)],
81 sizeof inferior_fp_registers -
82 sizeof inferior_fp_registers.fps_regs);
84 ptrace (PTRACE_SETREGS, inferior_pid,
85 (PTRACE_ARG3_TYPE) & inferior_registers);
87 ptrace (PTRACE_SETFPREGS, inferior_pid,
88 (PTRACE_ARG3_TYPE) & inferior_fp_registers);
92 /* All of this stuff is only relevant if both host and target are sun3. */
94 /* Provide registers to GDB from a core file.
96 CORE_REG_SECT points to an array of bytes, which were obtained from
97 a core file which BFD thinks might contain register contents.
98 CORE_REG_SIZE is its size.
100 WHICH says which register set corelow suspects this is:
101 0 --- the general-purpose register set
102 2 --- the floating-point register set
104 REG_ADDR isn't used. */
107 fetch_core_registers (char *core_reg_sect, unsigned core_reg_size,
108 int which, CORE_ADDR reg_addr)
110 struct regs *regs = (struct regs *) core_reg_sect;
114 if (core_reg_size < sizeof (struct regs))
115 error ("Can't find registers in core file");
117 memcpy (registers, (char *) regs, 16 * 4);
118 supply_register (PS_REGNUM, (char *) ®s->r_ps);
119 supply_register (PC_REGNUM, (char *) ®s->r_pc);
125 #define fpustruct ((struct fpu *) core_reg_sect)
127 if (core_reg_size >= sizeof (struct fpu))
131 memcpy (®isters[REGISTER_BYTE (FP0_REGNUM)],
132 fpustruct->f_fpstatus.fps_regs,
133 sizeof fpustruct->f_fpstatus.fps_regs);
134 memcpy (®isters[REGISTER_BYTE (FPC_REGNUM)],
135 &fpustruct->f_fpstatus.fps_control,
136 sizeof fpustruct->f_fpstatus -
137 sizeof fpustruct->f_fpstatus.fps_regs);
141 fprintf_unfiltered (gdb_stderr,
142 "Couldn't read float regs from core file\n");
147 /* Register that we are able to handle sun3 core file formats.
148 FIXME: is this really bfd_target_unknown_flavour? */
150 static struct core_fns sun3_core_fns =
152 bfd_target_unknown_flavour, /* core_flavour */
153 default_check_format, /* check_format */
154 default_core_sniffer, /* core_sniffer */
155 fetch_core_registers, /* core_read_registers */
160 _initialize_core_sun3 (void)
162 add_core_fns (&sun3_core_fns);