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-rw-r--r--gdb/hp300ux-nat.c221
1 files changed, 221 insertions, 0 deletions
diff --git a/gdb/hp300ux-nat.c b/gdb/hp300ux-nat.c
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+/* HP/UX native interface for HP 300's, for GDB when running under Unix.
+ Copyright 1986, 1987, 1989, 1991, 1992, 1993 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"
+
+/* Defining this means some system include files define some extra stuff. */
+#define WOPR
+#include <sys/param.h>
+#include <signal.h>
+#include <sys/user.h>
+#include <fcntl.h>
+
+#include <sys/ptrace.h>
+#include <sys/reg.h>
+#include <sys/trap.h>
+
+#include <sys/file.h>
+
+static void
+fetch_inferior_register PARAMS ((int, unsigned int));
+
+static void
+store_inferior_register_1 PARAMS ((int, unsigned int, int));
+
+static void
+store_inferior_register PARAMS ((int, unsigned int));
+
+/* Get kernel_u_addr using HPUX-style nlist(). */
+CORE_ADDR kernel_u_addr;
+
+struct hpnlist {
+ char * n_name;
+ long n_value;
+ unsigned char n_type;
+ unsigned char n_length;
+ short n_almod;
+ short n_unused;
+};
+static struct hpnlist nl[] = {{ "_u", -1, }, { (char *) 0, }};
+
+/* read the value of the u area from the hp-ux kernel */
+void
+_initialize_hp300ux_nat ()
+{
+#ifndef HPUX_VERSION_5
+ nlist ("/hp-ux", nl);
+ kernel_u_addr = nl[0].n_value;
+#else /* HPUX version 5. */
+ kernel_u_addr = (CORE_ADDR) 0x0097900;
+#endif
+}
+
+#define INFERIOR_AR0(u) \
+ ((ptrace \
+ (PT_RUAREA, inferior_pid, \
+ (PTRACE_ARG3_TYPE) ((char *) &u.u_ar0 - (char *) &u), 0, 0)) \
+ - kernel_u_addr)
+
+static void
+fetch_inferior_register (regno, regaddr)
+ register int regno;
+ register unsigned int regaddr;
+{
+#ifndef HPUX_VERSION_5
+ if (regno == PS_REGNUM)
+ {
+ union { int i; short s[2]; } ps_val;
+ int regval;
+
+ ps_val.i = (ptrace (PT_RUAREA, inferior_pid, (PTRACE_ARG3_TYPE) regaddr,
+ 0, 0));
+ regval = ps_val.s[0];
+ supply_register (regno, (char *)&regval);
+ }
+ else
+#endif /* not HPUX_VERSION_5 */
+ {
+ char buf[MAX_REGISTER_RAW_SIZE];
+ register int i;
+
+ for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
+ {
+ *(int *) &buf[i] = ptrace (PT_RUAREA, inferior_pid,
+ (PTRACE_ARG3_TYPE) regaddr, 0, 0);
+ regaddr += sizeof (int);
+ }
+ supply_register (regno, buf);
+ }
+ return;
+}
+
+static void
+store_inferior_register_1 (regno, regaddr, val)
+ int regno;
+ unsigned int regaddr;
+ int val;
+{
+ errno = 0;
+ ptrace (PT_WUAREA, inferior_pid, (PTRACE_ARG3_TYPE) regaddr, val, 0);
+#if 0
+ /* HP-UX randomly sets errno to non-zero for regno == 25.
+ However, the value is correctly written, so ignore errno. */
+ if (errno != 0)
+ {
+ char string_buf[64];
+
+ sprintf (string_buf, "writing register number %d", regno);
+ perror_with_name (string_buf);
+ }
+#endif
+ return;
+}
+
+static void
+store_inferior_register (regno, regaddr)
+ register int regno;
+ register unsigned int regaddr;
+{
+#ifndef HPUX_VERSION_5
+ if (regno == PS_REGNUM)
+ {
+ union { int i; short s[2]; } ps_val;
+
+ ps_val.i = (ptrace (PT_RUAREA, inferior_pid, (PTRACE_ARG3_TYPE) regaddr,
+ 0, 0));
+ ps_val.s[0] = (read_register (regno));
+ store_inferior_register_1 (regno, regaddr, ps_val.i);
+ }
+ else
+#endif /* not HPUX_VERSION_5 */
+ {
+ register int i;
+ extern char registers[];
+
+ for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
+ {
+ store_inferior_register_1
+ (regno, regaddr,
+ (*(int *) &registers[(REGISTER_BYTE (regno)) + i]));
+ regaddr += sizeof (int);
+ }
+ }
+ return;
+}
+
+void
+fetch_inferior_registers (regno)
+ int regno;
+{
+ struct user u;
+ register unsigned int ar0_offset;
+
+ ar0_offset = (INFERIOR_AR0 (u));
+ if (regno == -1)
+ {
+ for (regno = 0; (regno < FP0_REGNUM); regno++)
+ fetch_inferior_register (regno, (REGISTER_ADDR (ar0_offset, regno)));
+ for (; (regno < NUM_REGS); regno++)
+ fetch_inferior_register (regno, (FP_REGISTER_ADDR (u, regno)));
+ }
+ else
+ fetch_inferior_register (regno,
+ (regno < FP0_REGNUM
+ ? REGISTER_ADDR (ar0_offset, regno)
+ : FP_REGISTER_ADDR (u, regno)));
+}
+
+/* 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)
+ register int regno;
+{
+ struct user u;
+ register unsigned int ar0_offset;
+
+ if (regno >= FP0_REGNUM)
+ {
+ store_inferior_register (regno, (FP_REGISTER_ADDR (u, regno)));
+ return;
+ }
+
+ ar0_offset = (INFERIOR_AR0 (u));
+ if (regno >= 0)
+ {
+ store_inferior_register (regno, (REGISTER_ADDR (ar0_offset, regno)));
+ return;
+ }
+
+ for (regno = 0; (regno < FP0_REGNUM); regno++)
+ store_inferior_register (regno, (REGISTER_ADDR (ar0_offset, regno)));
+ for (; (regno < NUM_REGS); regno++)
+ store_inferior_register (regno, (FP_REGISTER_ADDR (u, regno)));
+ return;
+}
+
+int
+getpagesize ()
+{
+ return 4096;
+}