276 lines
8.1 KiB
C
276 lines
8.1 KiB
C
/* Native-dependent Motorola 88xxx support for GDB, the GNU Debugger.
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Copyright 1988, 1990, 1991, 1992 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include "defs.h"
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#include "frame.h"
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#include "inferior.h"
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/dir.h>
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#include <signal.h>
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#include "gdbcore.h"
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#include <sys/user.h>
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#ifndef USER /* added to support BCS ptrace_user */
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#define USER ptrace_user
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#endif
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#include <sys/ioctl.h>
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#include <fcntl.h>
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#include <sys/file.h>
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#include <sys/stat.h>
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#include "symtab.h"
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#include "setjmp.h"
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#include "value.h"
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#ifdef DELTA88
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#include <sys/ptrace.h>
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/* define offsets to the pc instruction offsets in ptrace_user struct */
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#define SXIP_OFFSET ((char *)&u.pt_sigframe.sig_sxip - (char *)&u)
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#define SNIP_OFFSET ((char *)&u.pt_sigframe.sig_snip - (char *)&u)
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#define SFIP_OFFSET ((char *)&u.pt_sigframe.sig_sfip - (char *)&u)
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#else
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/* define offsets to the pc instruction offsets in ptrace_user struct */
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#define SXIP_OFFSET ((char *)&u.pt_sigframe.dg_sigframe.sc_sxip - (char *)&u)
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#define SNIP_OFFSET ((char *)&u.pt_sigframe.dg_sigframe.sc_snip - (char *)&u)
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#define SFIP_OFFSET ((char *)&u.pt_sigframe.dg_sigframe.sc_sfip - (char *)&u)
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#endif
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extern int have_symbol_file_p();
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extern jmp_buf stack_jmp;
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extern int errno;
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extern char registers[REGISTER_BYTES];
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void
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fetch_inferior_registers (regno)
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int regno; /* Original value discarded */
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{
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register unsigned int regaddr;
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char buf[MAX_REGISTER_RAW_SIZE];
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register int i;
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struct USER u;
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unsigned int offset;
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offset = (char *) &u.pt_r0 - (char *) &u;
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regaddr = offset; /* byte offset to r0;*/
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/* offset = ptrace (3, inferior_pid, (PTRACE_ARG3_TYPE) offset, 0) - KERNEL_U_ADDR; */
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for (regno = 0; regno < NUM_REGS; regno++)
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{
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/*regaddr = register_addr (regno, offset);*/
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/* 88k enhancement */
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for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
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{
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*(int *) &buf[i] = ptrace (3, inferior_pid,
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(PTRACE_ARG3_TYPE) regaddr, 0);
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regaddr += sizeof (int);
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}
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supply_register (regno, buf);
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}
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/* now load up registers 36 - 38; special pc registers */
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*(int *) &buf[0] = ptrace (3,inferior_pid,
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(PTRACE_ARG3_TYPE) SXIP_OFFSET ,0);
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supply_register (SXIP_REGNUM, buf);
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*(int *) &buf[0] = ptrace (3, inferior_pid,
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(PTRACE_ARG3_TYPE) SNIP_OFFSET,0);
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supply_register (SNIP_REGNUM, buf);
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*(int *) &buf[0] = ptrace (3, inferior_pid,
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(PTRACE_ARG3_TYPE) SFIP_OFFSET,0);
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supply_register (SFIP_REGNUM, buf);
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}
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/* Store our register values back into the inferior.
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If REGNO is -1, do this for all registers.
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Otherwise, REGNO specifies which register (so we can save time). */
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void
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store_inferior_registers (regno)
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int regno;
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{
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register unsigned int regaddr;
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char buf[80];
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struct USER u;
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unsigned int offset = (char *) &u.pt_r0 - (char *) &u;
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regaddr = offset;
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if (regno >= 0)
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{
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/* regaddr = register_addr (regno, offset); */
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if (regno < PC_REGNUM)
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{
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regaddr = offset + regno * sizeof (int);
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errno = 0;
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ptrace (6, inferior_pid,
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(PTRACE_ARG3_TYPE) regaddr, read_register (regno));
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if (errno != 0)
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{
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sprintf (buf, "writing register number %d", regno);
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perror_with_name (buf);
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}
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}
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else if (regno == SXIP_REGNUM)
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ptrace (6, inferior_pid,
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(PTRACE_ARG3_TYPE) SXIP_OFFSET, read_register(regno));
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else if (regno == SNIP_REGNUM)
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ptrace (6, inferior_pid,
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(PTRACE_ARG3_TYPE) SNIP_OFFSET, read_register(regno));
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else if (regno == SFIP_REGNUM)
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ptrace (6, inferior_pid,
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(PTRACE_ARG3_TYPE) SFIP_OFFSET, read_register(regno));
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else printf ("Bad register number for store_inferior routine\n");
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}
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else {
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for (regno = 0; regno < NUM_REGS - 3; regno++)
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{
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/* regaddr = register_addr (regno, offset); */
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errno = 0;
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regaddr = offset + regno * sizeof (int);
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ptrace (6, inferior_pid,
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(PTRACE_ARG3_TYPE) regaddr, read_register (regno));
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if (errno != 0)
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{
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sprintf (buf, "writing register number %d", regno);
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perror_with_name (buf);
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}
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}
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ptrace (6,inferior_pid,
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(PTRACE_ARG3_TYPE) SXIP_OFFSET,read_register(SXIP_REGNUM));
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ptrace (6,inferior_pid,
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(PTRACE_ARG3_TYPE) SNIP_OFFSET,read_register(SNIP_REGNUM));
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ptrace (6,inferior_pid,
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(PTRACE_ARG3_TYPE) SFIP_OFFSET,read_register(SFIP_REGNUM));
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}
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}
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/* blockend is the address of the end of the user structure */
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m88k_register_u_addr (blockend, regnum)
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{
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struct USER u;
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int ustart = blockend - sizeof (struct USER);
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switch (regnum)
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{
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case 0:
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case 1:
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case 2:
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case 3:
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case 4:
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case 5:
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case 6:
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case 7:
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case 8:
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case 9:
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case 10:
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case 11:
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case 12:
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case 13:
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case 14:
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case 15:
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case 16:
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case 17:
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case 18:
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case 19:
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case 20:
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case 21:
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case 22:
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case 23:
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case 24:
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case 25:
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case 26:
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case 27:
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case 28:
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case 29:
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case 30:
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case 31: return (ustart + ((int) &u.pt_r0 - (int) &u) + sizeof(REGISTER_TYPE) * regnum);
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case PSR_REGNUM: return (ustart + ((int) &u.pt_psr - (int) &u));
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case FPSR_REGNUM: return (ustart + ((int) &u.pt_fpsr - (int) &u));
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case FPCR_REGNUM: return (ustart + ((int) &u.pt_fpcr - (int) &u));
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case SXIP_REGNUM: return (ustart + SXIP_OFFSET);
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case SNIP_REGNUM: return (ustart + SNIP_OFFSET);
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case SFIP_REGNUM: return (ustart + SFIP_OFFSET);
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default: return (blockend + sizeof (REGISTER_TYPE) * regnum);
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}
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}
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#ifdef USE_PROC_FS
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#include <sys/procfs.h>
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/* Given a pointer to a general register set in /proc format (gregset_t *),
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unpack the register contents and supply them as gdb's idea of the current
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register values. */
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void
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supply_gregset (gregsetp)
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gregset_t *gregsetp;
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{
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register int regi;
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register greg_t *regp = (greg_t *) gregsetp;
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for (regi=0; regi <= SP_REGNUM; regi++)
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supply_register (regi, (char *) (regp + regi));
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supply_register (SXIP_REGNUM, (char *) (regp + R_XIP));
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supply_register (SNIP_REGNUM, (char *) (regp + R_NIP));
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supply_register (SFIP_REGNUM, (char *) (regp + R_FIP));
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supply_register (PSR_REGNUM, (char *) (regp + R_PSR));
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supply_register (FPSR_REGNUM, (char *) (regp + R_FPSR));
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supply_register (FPCR_REGNUM, (char *) (regp + R_FPCR));
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}
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void
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fill_gregset (gregsetp, regno)
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gregset_t *gregsetp;
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int regno;
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{
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int regi;
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register greg_t *regp = (greg_t *) gregsetp;
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extern char registers[];
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for (regi = 0 ; regi <= R_R31 ; regi++)
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if ((regno == -1) || (regno == regi))
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*(regp + regi) = *(int *) ®isters[REGISTER_BYTE(regi)];
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if ((regno == -1) || (regno == SXIP_REGNUM))
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*(regp + R_XIP) = *(int *) ®isters[REGISTER_BYTE(SXIP_REGNUM)];
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if ((regno == -1) || (regno == SNIP_REGNUM))
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*(regp + R_NIP) = *(int *) ®isters[REGISTER_BYTE(SNIP_REGNUM)];
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if ((regno == -1) || (regno == SFIP_REGNUM))
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*(regp + R_FIP) = *(int *) ®isters[REGISTER_BYTE(SFIP_REGNUM)];
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if ((regno == -1) || (regno == PSR_REGNUM))
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*(regp + R_PSR) = *(int *) ®isters[REGISTER_BYTE(PSR_REGNUM)];
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if ((regno == -1) || (regno == FPSR_REGNUM))
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*(regp + R_FPSR) = *(int *) ®isters[REGISTER_BYTE(FPSR_REGNUM)];
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if ((regno == -1) || (regno == FPCR_REGNUM))
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*(regp + R_FPCR) = *(int *) ®isters[REGISTER_BYTE(FPCR_REGNUM)];
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}
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#endif /* USE_PROC_FS */
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