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-rw-r--r--gdb/m88k-nat.c285
1 files changed, 285 insertions, 0 deletions
diff --git a/gdb/m88k-nat.c b/gdb/m88k-nat.c
new file mode 100644
index 00000000000..19e9392ea66
--- /dev/null
+++ b/gdb/m88k-nat.c
@@ -0,0 +1,285 @@
+/* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+#include "defs.h"
+#include "frame.h"
+#include "inferior.h"
+
+#include <sys/types.h>
+#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 "gdb_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;
+
+ /* Don't try to deal with EXIP_REGNUM or ENIP_REGNUM, because I think either
+ svr3 doesn't run on an 88110, or the kernel isolates the different (not
+ completely sure this is true, but seems to be. */
+ 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_unfiltered ("Bad register number for store_inferior routine\n");
+ }
+ else
+ {
+ for (regno = 0; regno < PC_REGNUM; 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) + REGISTER_SIZE * 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:
+ if (regnum < NUM_REGS)
+ /* The register is one of those which is not defined...
+ give it zero */
+ return (ustart + ((int) &u.pt_r0 - (int) &u));
+ else
+ return (blockend + REGISTER_SIZE * regnum);
+ }
+}
+
+#ifdef USE_PROC_FS
+
+#include <sys/procfs.h>
+
+/* Given a pointer to a general register set in /proc format (gregset_t *),
+ unpack the register contents and supply them as gdb's idea of the current
+ register values. */
+
+void
+supply_gregset (gregsetp)
+ gregset_t *gregsetp;
+{
+ register int regi;
+ register greg_t *regp = (greg_t *) gregsetp;
+
+ for (regi=0; regi <= SP_REGNUM; regi++)
+ supply_register (regi, (char *) (regp + regi));
+
+ supply_register (SXIP_REGNUM, (char *) (regp + R_XIP));
+ supply_register (SNIP_REGNUM, (char *) (regp + R_NIP));
+ supply_register (SFIP_REGNUM, (char *) (regp + R_FIP));
+ supply_register (PSR_REGNUM, (char *) (regp + R_PSR));
+ supply_register (FPSR_REGNUM, (char *) (regp + R_FPSR));
+ supply_register (FPCR_REGNUM, (char *) (regp + R_FPCR));
+}
+
+void
+fill_gregset (gregsetp, regno)
+ gregset_t *gregsetp;
+ int regno;
+{
+ int regi;
+ register greg_t *regp = (greg_t *) gregsetp;
+ extern char registers[];
+
+ for (regi = 0 ; regi <= R_R31 ; regi++)
+ if ((regno == -1) || (regno == regi))
+ *(regp + regi) = *(int *) &registers[REGISTER_BYTE(regi)];
+
+ if ((regno == -1) || (regno == SXIP_REGNUM))
+ *(regp + R_XIP) = *(int *) &registers[REGISTER_BYTE(SXIP_REGNUM)];
+ if ((regno == -1) || (regno == SNIP_REGNUM))
+ *(regp + R_NIP) = *(int *) &registers[REGISTER_BYTE(SNIP_REGNUM)];
+ if ((regno == -1) || (regno == SFIP_REGNUM))
+ *(regp + R_FIP) = *(int *) &registers[REGISTER_BYTE(SFIP_REGNUM)];
+ if ((regno == -1) || (regno == PSR_REGNUM))
+ *(regp + R_PSR) = *(int *) &registers[REGISTER_BYTE(PSR_REGNUM)];
+ if ((regno == -1) || (regno == FPSR_REGNUM))
+ *(regp + R_FPSR) = *(int *) &registers[REGISTER_BYTE(FPSR_REGNUM)];
+ if ((regno == -1) || (regno == FPCR_REGNUM))
+ *(regp + R_FPCR) = *(int *) &registers[REGISTER_BYTE(FPCR_REGNUM)];
+}
+
+#endif /* USE_PROC_FS */
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