1 /* Native-dependent Motorola 88xxx support for GDB, the GNU Debugger.
2 Copyright 1988, 1990, 1991, 1992, 1993, 1995, 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/types.h>
28 #include <sys/param.h>
34 #ifndef USER /* added to support BCS ptrace_user */
35 #define USER ptrace_user
37 #include <sys/ioctl.h>
47 #include <sys/ptrace.h>
49 /* define offsets to the pc instruction offsets in ptrace_user struct */
50 #define SXIP_OFFSET ((char *)&u.pt_sigframe.sig_sxip - (char *)&u)
51 #define SNIP_OFFSET ((char *)&u.pt_sigframe.sig_snip - (char *)&u)
52 #define SFIP_OFFSET ((char *)&u.pt_sigframe.sig_sfip - (char *)&u)
54 /* define offsets to the pc instruction offsets in ptrace_user struct */
55 #define SXIP_OFFSET ((char *)&u.pt_sigframe.dg_sigframe.sc_sxip - (char *)&u)
56 #define SNIP_OFFSET ((char *)&u.pt_sigframe.dg_sigframe.sc_snip - (char *)&u)
57 #define SFIP_OFFSET ((char *)&u.pt_sigframe.dg_sigframe.sc_sfip - (char *)&u)
60 extern int have_symbol_file_p ();
62 extern jmp_buf stack_jmp;
67 fetch_inferior_registers (int regno)
69 register unsigned int regaddr;
70 char buf[MAX_REGISTER_RAW_SIZE];
76 offset = (char *) &u.pt_r0 - (char *) &u;
77 regaddr = offset; /* byte offset to r0; */
79 /* offset = ptrace (3, PIDGET (inferior_ptid), (PTRACE_ARG3_TYPE) offset, 0) - KERNEL_U_ADDR; */
80 for (regno = 0; regno < NUM_REGS; regno++)
82 /*regaddr = register_addr (regno, offset); */
85 for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
87 *(int *) &buf[i] = ptrace (3, PIDGET (inferior_ptid),
88 (PTRACE_ARG3_TYPE) regaddr, 0);
89 regaddr += sizeof (int);
91 supply_register (regno, buf);
93 /* now load up registers 36 - 38; special pc registers */
94 *(int *) &buf[0] = ptrace (3, PIDGET (inferior_ptid),
95 (PTRACE_ARG3_TYPE) SXIP_OFFSET, 0);
96 supply_register (SXIP_REGNUM, buf);
97 *(int *) &buf[0] = ptrace (3, PIDGET (inferior_ptid),
98 (PTRACE_ARG3_TYPE) SNIP_OFFSET, 0);
99 supply_register (SNIP_REGNUM, buf);
100 *(int *) &buf[0] = ptrace (3, PIDGET (inferior_ptid),
101 (PTRACE_ARG3_TYPE) SFIP_OFFSET, 0);
102 supply_register (SFIP_REGNUM, buf);
105 /* Store our register values back into the inferior.
106 If REGNO is -1, do this for all registers.
107 Otherwise, REGNO specifies which register (so we can save time). */
110 store_inferior_registers (int regno)
112 register unsigned int regaddr;
117 unsigned int offset = (char *) &u.pt_r0 - (char *) &u;
121 /* Don't try to deal with EXIP_REGNUM or ENIP_REGNUM, because I think either
122 svr3 doesn't run on an 88110, or the kernel isolates the different (not
123 completely sure this is true, but seems to be. */
126 /* regaddr = register_addr (regno, offset); */
127 if (regno < PC_REGNUM)
129 regaddr = offset + regno * sizeof (int);
131 ptrace (6, PIDGET (inferior_ptid),
132 (PTRACE_ARG3_TYPE) regaddr, read_register (regno));
135 sprintf (buf, "writing register number %d", regno);
136 perror_with_name (buf);
139 else if (regno == SXIP_REGNUM)
140 ptrace (6, PIDGET (inferior_ptid),
141 (PTRACE_ARG3_TYPE) SXIP_OFFSET, read_register (regno));
142 else if (regno == SNIP_REGNUM)
143 ptrace (6, PIDGET (inferior_ptid),
144 (PTRACE_ARG3_TYPE) SNIP_OFFSET, read_register (regno));
145 else if (regno == SFIP_REGNUM)
146 ptrace (6, PIDGET (inferior_ptid),
147 (PTRACE_ARG3_TYPE) SFIP_OFFSET, read_register (regno));
149 printf_unfiltered ("Bad register number for store_inferior routine\n");
153 for (regno = 0; regno < PC_REGNUM; regno++)
155 /* regaddr = register_addr (regno, offset); */
157 regaddr = offset + regno * sizeof (int);
158 ptrace (6, PIDGET (inferior_ptid),
159 (PTRACE_ARG3_TYPE) regaddr, read_register (regno));
162 sprintf (buf, "writing register number %d", regno);
163 perror_with_name (buf);
166 ptrace (6, PIDGET (inferior_ptid),
167 (PTRACE_ARG3_TYPE) SXIP_OFFSET, read_register (SXIP_REGNUM));
168 ptrace (6, PIDGET (inferior_ptid),
169 (PTRACE_ARG3_TYPE) SNIP_OFFSET, read_register (SNIP_REGNUM));
170 ptrace (6, PIDGET (inferior_ptid),
171 (PTRACE_ARG3_TYPE) SFIP_OFFSET, read_register (SFIP_REGNUM));
176 /* blockend is the address of the end of the user structure */
177 m88k_register_u_addr (int blockend, int regnum)
180 int ustart = blockend - sizeof (struct USER);
215 return (ustart + ((int) &u.pt_r0 - (int) &u) + REGISTER_SIZE * regnum);
217 return (ustart + ((int) &u.pt_psr - (int) &u));
219 return (ustart + ((int) &u.pt_fpsr - (int) &u));
221 return (ustart + ((int) &u.pt_fpcr - (int) &u));
223 return (ustart + SXIP_OFFSET);
225 return (ustart + SNIP_OFFSET);
227 return (ustart + SFIP_OFFSET);
229 if (regnum < NUM_REGS)
230 /* The register is one of those which is not defined...
232 return (ustart + ((int) &u.pt_r0 - (int) &u));
234 return (blockend + REGISTER_SIZE * regnum);
240 #include <sys/procfs.h>
242 /* Prototypes for supply_gregset etc. */
245 /* Given a pointer to a general register set in /proc format (gregset_t *),
246 unpack the register contents and supply them as gdb's idea of the current
250 supply_gregset (gregset_t *gregsetp)
253 register greg_t *regp = (greg_t *) gregsetp;
255 for (regi = 0; regi <= SP_REGNUM; regi++)
256 supply_register (regi, (char *) (regp + regi));
258 supply_register (SXIP_REGNUM, (char *) (regp + R_XIP));
259 supply_register (SNIP_REGNUM, (char *) (regp + R_NIP));
260 supply_register (SFIP_REGNUM, (char *) (regp + R_FIP));
261 supply_register (PSR_REGNUM, (char *) (regp + R_PSR));
262 supply_register (FPSR_REGNUM, (char *) (regp + R_FPSR));
263 supply_register (FPCR_REGNUM, (char *) (regp + R_FPCR));
267 fill_gregset (gregset_t *gregsetp, int regno)
270 register greg_t *regp = (greg_t *) gregsetp;
272 for (regi = 0; regi <= R_R31; regi++)
273 if ((regno == -1) || (regno == regi))
274 *(regp + regi) = *(int *) ®isters[REGISTER_BYTE (regi)];
276 if ((regno == -1) || (regno == SXIP_REGNUM))
277 *(regp + R_XIP) = *(int *) ®isters[REGISTER_BYTE (SXIP_REGNUM)];
278 if ((regno == -1) || (regno == SNIP_REGNUM))
279 *(regp + R_NIP) = *(int *) ®isters[REGISTER_BYTE (SNIP_REGNUM)];
280 if ((regno == -1) || (regno == SFIP_REGNUM))
281 *(regp + R_FIP) = *(int *) ®isters[REGISTER_BYTE (SFIP_REGNUM)];
282 if ((regno == -1) || (regno == PSR_REGNUM))
283 *(regp + R_PSR) = *(int *) ®isters[REGISTER_BYTE (PSR_REGNUM)];
284 if ((regno == -1) || (regno == FPSR_REGNUM))
285 *(regp + R_FPSR) = *(int *) ®isters[REGISTER_BYTE (FPSR_REGNUM)];
286 if ((regno == -1) || (regno == FPCR_REGNUM))
287 *(regp + R_FPCR) = *(int *) ®isters[REGISTER_BYTE (FPCR_REGNUM)];
290 #endif /* USE_PROC_FS */