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- /* Native-dependent Motorola 88xxx support for GDB, the GNU Debugger.
- Copyright 1988, 1990, 1991, 1992 Free Software Foundation, 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- #include "defs.h"
- #include "frame.h"
- #include "inferior.h"
-
- #ifdef USG
- #include <sys/types.h>
- #endif
-
- #include <sys/param.h>
- #include <sys/dir.h>
- #include <signal.h>
- #include "gdbcore.h"
- #include <sys/user.h>
-
- #ifndef USER /* added to support BCS ptrace_user */
- #define USER ptrace_user
- #endif
- #include <sys/ioctl.h>
- #include <fcntl.h>
- #include <sys/file.h>
- #include <sys/stat.h>
-
- #include "symtab.h"
- #include "setjmp.h"
- #include "value.h"
-
- #ifdef DELTA88
- /* #include <sys/ptrace.h> */
-
- /* define offsets to the pc instruction offsets in ptrace_user struct */
- #define SXIP_OFFSET ((char *)&u.pt_sigframe.sig_sxip - (char *)&u)
- #define SNIP_OFFSET ((char *)&u.pt_sigframe.sig_snip - (char *)&u)
- #define SFIP_OFFSET ((char *)&u.pt_sigframe.sig_sfip - (char *)&u)
- #else
- /* define offsets to the pc instruction offsets in ptrace_user struct */
- #define SXIP_OFFSET ((char *)&u.pt_sigframe.dg_sigframe.sc_sxip - (char *)&u)
- #define SNIP_OFFSET ((char *)&u.pt_sigframe.dg_sigframe.sc_snip - (char *)&u)
- #define SFIP_OFFSET ((char *)&u.pt_sigframe.dg_sigframe.sc_sfip - (char *)&u)
- #endif
-
- extern int have_symbol_file_p();
-
- extern jmp_buf stack_jmp;
-
- extern int errno;
- extern char registers[REGISTER_BYTES];
-
- void
- fetch_inferior_registers (regno)
- int regno; /* Original value discarded */
- {
- register unsigned int regaddr;
- char buf[MAX_REGISTER_RAW_SIZE];
- register int i;
-
- struct USER u;
- unsigned int offset;
-
- offset = (char *) &u.pt_r0 - (char *) &u;
- regaddr = offset; /* byte offset to r0;*/
-
- /* offset = ptrace (3, inferior_pid, (PTRACE_ARG3_TYPE) offset, 0) - KERNEL_U_ADDR; */
- for (regno = 0; regno < NUM_REGS; regno++)
- {
- /*regaddr = register_addr (regno, offset);*/
- /* 88k enhancement */
-
- for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
- {
- *(int *) &buf[i] = ptrace (3, inferior_pid,
- (PTRACE_ARG3_TYPE) regaddr, 0);
- regaddr += sizeof (int);
- }
- supply_register (regno, buf);
- }
- /* now load up registers 36 - 38; special pc registers */
- *(int *) &buf[0] = ptrace (3,inferior_pid,
- (PTRACE_ARG3_TYPE) SXIP_OFFSET ,0);
- supply_register (SXIP_REGNUM, buf);
- *(int *) &buf[0] = ptrace (3, inferior_pid,
- (PTRACE_ARG3_TYPE) SNIP_OFFSET,0);
- supply_register (SNIP_REGNUM, buf);
- *(int *) &buf[0] = ptrace (3, inferior_pid,
- (PTRACE_ARG3_TYPE) SFIP_OFFSET,0);
- supply_register (SFIP_REGNUM, buf);
- }
-
- /* Store our register values back into the inferior.
- If REGNO is -1, do this for all registers.
- Otherwise, REGNO specifies which register (so we can save time). */
-
- void
- store_inferior_registers (regno)
- int regno;
- {
- register unsigned int regaddr;
- char buf[80];
-
- struct USER u;
-
-
- unsigned int offset = (char *) &u.pt_r0 - (char *) &u;
-
- regaddr = offset;
-
- if (regno >= 0)
- {
- /* regaddr = register_addr (regno, offset); */
- if (regno < PC_REGNUM)
- {
- regaddr = offset + regno * sizeof (int);
- errno = 0;
- ptrace (6, inferior_pid,
- (PTRACE_ARG3_TYPE) regaddr, read_register (regno));
- if (errno != 0)
- {
- sprintf (buf, "writing register number %d", regno);
- perror_with_name (buf);
- }
- }
- else if (regno == SXIP_REGNUM)
- ptrace (6, inferior_pid,
- (PTRACE_ARG3_TYPE) SXIP_OFFSET, read_register(regno));
- else if (regno == SNIP_REGNUM)
- ptrace (6, inferior_pid,
- (PTRACE_ARG3_TYPE) SNIP_OFFSET, read_register(regno));
- else if (regno == SFIP_REGNUM)
- ptrace (6, inferior_pid,
- (PTRACE_ARG3_TYPE) SFIP_OFFSET, read_register(regno));
- else printf ("Bad register number for store_inferior routine\n");
- }
- else {
- for (regno = 0; regno < NUM_REGS - 3; regno++)
- {
- /* regaddr = register_addr (regno, offset); */
- errno = 0;
- regaddr = offset + regno * sizeof (int);
- ptrace (6, inferior_pid,
- (PTRACE_ARG3_TYPE) regaddr, read_register (regno));
- if (errno != 0)
- {
- sprintf (buf, "writing register number %d", regno);
- perror_with_name (buf);
- }
- }
- ptrace (6,inferior_pid,
- (PTRACE_ARG3_TYPE) SXIP_OFFSET,read_register(SXIP_REGNUM));
- ptrace (6,inferior_pid,
- (PTRACE_ARG3_TYPE) SNIP_OFFSET,read_register(SNIP_REGNUM));
- ptrace (6,inferior_pid,
- (PTRACE_ARG3_TYPE) SFIP_OFFSET,read_register(SFIP_REGNUM));
- }
-
-
- }
-
-
- /* blockend is the address of the end of the user structure */
- m88k_register_u_addr (blockend, regnum)
- {
- struct USER u;
- int ustart = blockend - sizeof (struct USER);
- switch (regnum)
- {
- case 0:
- case 1:
- case 2:
- case 3:
- case 4:
- case 5:
- case 6:
- case 7:
- case 8:
- case 9:
- case 10:
- case 11:
- case 12:
- case 13:
- case 14:
- case 15:
- case 16:
- case 17:
- case 18:
- case 19:
- case 20:
- case 21:
- case 22:
- case 23:
- case 24:
- case 25:
- case 26:
- case 27:
- case 28:
- case 29:
- case 30:
- case 31: return (ustart + ((int) &u.pt_r0 - (int) &u) + sizeof(REGISTER_TYPE) * regnum);
- case PSR_REGNUM: return (ustart + ((int) &u.pt_psr - (int) &u));
- case FPSR_REGNUM: return (ustart + ((int) &u.pt_fpsr - (int) &u));
- case FPCR_REGNUM: return (ustart + ((int) &u.pt_fpcr - (int) &u));
- case SXIP_REGNUM: return (ustart + SXIP_OFFSET);
- case SNIP_REGNUM: return (ustart + SNIP_OFFSET);
- case SFIP_REGNUM: return (ustart + SFIP_OFFSET);
- default: return (blockend + sizeof (REGISTER_TYPE) * regnum);
- }
- }
-
-