1 /* Native-dependent Motorola 88xxx support for GDB, the GNU Debugger.
2 Copyright 1988, 1990, 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/types.h>
26 #include <sys/param.h>
32 #ifndef USER /* added to support BCS ptrace_user */
33 #define USER ptrace_user
35 #include <sys/ioctl.h>
45 #include <sys/ptrace.h>
47 /* define offsets to the pc instruction offsets in ptrace_user struct */
48 #define SXIP_OFFSET ((char *)&u.pt_sigframe.sig_sxip - (char *)&u)
49 #define SNIP_OFFSET ((char *)&u.pt_sigframe.sig_snip - (char *)&u)
50 #define SFIP_OFFSET ((char *)&u.pt_sigframe.sig_sfip - (char *)&u)
52 /* define offsets to the pc instruction offsets in ptrace_user struct */
53 #define SXIP_OFFSET ((char *)&u.pt_sigframe.dg_sigframe.sc_sxip - (char *)&u)
54 #define SNIP_OFFSET ((char *)&u.pt_sigframe.dg_sigframe.sc_snip - (char *)&u)
55 #define SFIP_OFFSET ((char *)&u.pt_sigframe.dg_sigframe.sc_sfip - (char *)&u)
58 extern int have_symbol_file_p ();
60 extern jmp_buf stack_jmp;
65 fetch_inferior_registers (int regno)
67 register unsigned int regaddr;
68 char buf[MAX_REGISTER_RAW_SIZE];
74 offset = (char *) &u.pt_r0 - (char *) &u;
75 regaddr = offset; /* byte offset to r0; */
77 /* offset = ptrace (3, inferior_pid, (PTRACE_ARG3_TYPE) offset, 0) - KERNEL_U_ADDR; */
78 for (regno = 0; regno < NUM_REGS; regno++)
80 /*regaddr = register_addr (regno, offset); */
83 for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
85 *(int *) &buf[i] = ptrace (3, inferior_pid,
86 (PTRACE_ARG3_TYPE) regaddr, 0);
87 regaddr += sizeof (int);
89 supply_register (regno, buf);
91 /* now load up registers 36 - 38; special pc registers */
92 *(int *) &buf[0] = ptrace (3, inferior_pid,
93 (PTRACE_ARG3_TYPE) SXIP_OFFSET, 0);
94 supply_register (SXIP_REGNUM, buf);
95 *(int *) &buf[0] = ptrace (3, inferior_pid,
96 (PTRACE_ARG3_TYPE) SNIP_OFFSET, 0);
97 supply_register (SNIP_REGNUM, buf);
98 *(int *) &buf[0] = ptrace (3, inferior_pid,
99 (PTRACE_ARG3_TYPE) SFIP_OFFSET, 0);
100 supply_register (SFIP_REGNUM, buf);
103 /* Store our register values back into the inferior.
104 If REGNO is -1, do this for all registers.
105 Otherwise, REGNO specifies which register (so we can save time). */
108 store_inferior_registers (int regno)
110 register unsigned int regaddr;
115 unsigned int offset = (char *) &u.pt_r0 - (char *) &u;
119 /* Don't try to deal with EXIP_REGNUM or ENIP_REGNUM, because I think either
120 svr3 doesn't run on an 88110, or the kernel isolates the different (not
121 completely sure this is true, but seems to be. */
124 /* regaddr = register_addr (regno, offset); */
125 if (regno < PC_REGNUM)
127 regaddr = offset + regno * sizeof (int);
129 ptrace (6, inferior_pid,
130 (PTRACE_ARG3_TYPE) regaddr, read_register (regno));
133 sprintf (buf, "writing register number %d", regno);
134 perror_with_name (buf);
137 else if (regno == SXIP_REGNUM)
138 ptrace (6, inferior_pid,
139 (PTRACE_ARG3_TYPE) SXIP_OFFSET, read_register (regno));
140 else if (regno == SNIP_REGNUM)
141 ptrace (6, inferior_pid,
142 (PTRACE_ARG3_TYPE) SNIP_OFFSET, read_register (regno));
143 else if (regno == SFIP_REGNUM)
144 ptrace (6, inferior_pid,
145 (PTRACE_ARG3_TYPE) SFIP_OFFSET, read_register (regno));
147 printf_unfiltered ("Bad register number for store_inferior routine\n");
151 for (regno = 0; regno < PC_REGNUM; regno++)
153 /* regaddr = register_addr (regno, offset); */
155 regaddr = offset + regno * sizeof (int);
156 ptrace (6, inferior_pid,
157 (PTRACE_ARG3_TYPE) regaddr, read_register (regno));
160 sprintf (buf, "writing register number %d", regno);
161 perror_with_name (buf);
164 ptrace (6, inferior_pid,
165 (PTRACE_ARG3_TYPE) SXIP_OFFSET, read_register (SXIP_REGNUM));
166 ptrace (6, inferior_pid,
167 (PTRACE_ARG3_TYPE) SNIP_OFFSET, read_register (SNIP_REGNUM));
168 ptrace (6, inferior_pid,
169 (PTRACE_ARG3_TYPE) SFIP_OFFSET, read_register (SFIP_REGNUM));
174 /* blockend is the address of the end of the user structure */
175 m88k_register_u_addr (int blockend, int regnum)
178 int ustart = blockend - sizeof (struct USER);
213 return (ustart + ((int) &u.pt_r0 - (int) &u) + REGISTER_SIZE * regnum);
215 return (ustart + ((int) &u.pt_psr - (int) &u));
217 return (ustart + ((int) &u.pt_fpsr - (int) &u));
219 return (ustart + ((int) &u.pt_fpcr - (int) &u));
221 return (ustart + SXIP_OFFSET);
223 return (ustart + SNIP_OFFSET);
225 return (ustart + SFIP_OFFSET);
227 if (regnum < NUM_REGS)
228 /* The register is one of those which is not defined...
230 return (ustart + ((int) &u.pt_r0 - (int) &u));
232 return (blockend + REGISTER_SIZE * regnum);
238 #include <sys/procfs.h>
240 /* Prototypes for supply_gregset etc. */
243 /* Given a pointer to a general register set in /proc format (gregset_t *),
244 unpack the register contents and supply them as gdb's idea of the current
248 supply_gregset (gregset_t *gregsetp)
251 register greg_t *regp = (greg_t *) gregsetp;
253 for (regi = 0; regi <= SP_REGNUM; regi++)
254 supply_register (regi, (char *) (regp + regi));
256 supply_register (SXIP_REGNUM, (char *) (regp + R_XIP));
257 supply_register (SNIP_REGNUM, (char *) (regp + R_NIP));
258 supply_register (SFIP_REGNUM, (char *) (regp + R_FIP));
259 supply_register (PSR_REGNUM, (char *) (regp + R_PSR));
260 supply_register (FPSR_REGNUM, (char *) (regp + R_FPSR));
261 supply_register (FPCR_REGNUM, (char *) (regp + R_FPCR));
265 fill_gregset (gregset_t *gregsetp, int regno)
268 register greg_t *regp = (greg_t *) gregsetp;
270 for (regi = 0; regi <= R_R31; regi++)
271 if ((regno == -1) || (regno == regi))
272 *(regp + regi) = *(int *) ®isters[REGISTER_BYTE (regi)];
274 if ((regno == -1) || (regno == SXIP_REGNUM))
275 *(regp + R_XIP) = *(int *) ®isters[REGISTER_BYTE (SXIP_REGNUM)];
276 if ((regno == -1) || (regno == SNIP_REGNUM))
277 *(regp + R_NIP) = *(int *) ®isters[REGISTER_BYTE (SNIP_REGNUM)];
278 if ((regno == -1) || (regno == SFIP_REGNUM))
279 *(regp + R_FIP) = *(int *) ®isters[REGISTER_BYTE (SFIP_REGNUM)];
280 if ((regno == -1) || (regno == PSR_REGNUM))
281 *(regp + R_PSR) = *(int *) ®isters[REGISTER_BYTE (PSR_REGNUM)];
282 if ((regno == -1) || (regno == FPSR_REGNUM))
283 *(regp + R_FPSR) = *(int *) ®isters[REGISTER_BYTE (FPSR_REGNUM)];
284 if ((regno == -1) || (regno == FPCR_REGNUM))
285 *(regp + R_FPCR) = *(int *) ®isters[REGISTER_BYTE (FPCR_REGNUM)];
288 #endif /* USE_PROC_FS */