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269 lines
6.7 KiB
C
269 lines
6.7 KiB
C
/* HP/UX native interface for HP 300's, for GDB when running under Unix.
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Copyright 1986, 1987, 1989, 1991, 1992, 1993 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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/* Defining this means some system include files define some extra stuff. */
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#define WOPR
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#include <sys/param.h>
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#include <signal.h>
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#include <sys/user.h>
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#include <fcntl.h>
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#include <sys/ptrace.h>
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#include <sys/reg.h>
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#include <sys/trap.h>
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#include "gdbcore.h"
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#include <sys/file.h>
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/* Get kernel_u_addr using HPUX-style nlist(). */
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CORE_ADDR kernel_u_addr;
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struct hpnlist {
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char * n_name;
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long n_value;
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unsigned char n_type;
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unsigned char n_length;
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short n_almod;
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short n_unused;
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};
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static struct hpnlist nl[] = {{ "_u", -1, }, { (char *) 0, }};
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/* read the value of the u area from the hp-ux kernel */
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void
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_initialize_hp300ux_nat ()
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{
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#ifndef HPUX_VERSION_5
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nlist ("/hp-ux", nl);
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kernel_u_addr = nl[0].n_value;
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#else /* HPUX version 5. */
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kernel_u_addr = (CORE_ADDR) 0x0097900;
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#endif
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}
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#define INFERIOR_AR0(u) \
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((ptrace \
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(PT_RUAREA, inferior_pid, \
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(PTRACE_ARG3_TYPE) ((char *) &u.u_ar0 - (char *) &u), 0, 0)) \
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- kernel_u_addr)
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static void
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fetch_inferior_register (regno, regaddr)
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register int regno;
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register unsigned int regaddr;
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{
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#ifndef HPUX_VERSION_5
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if (regno == PS_REGNUM)
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{
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union { int i; short s[2]; } ps_val;
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int regval;
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ps_val.i = (ptrace (PT_RUAREA, inferior_pid, (PTRACE_ARG3_TYPE) regaddr,
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0, 0));
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regval = ps_val.s[0];
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supply_register (regno, (char *)®val);
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}
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else
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#endif /* not HPUX_VERSION_5 */
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{
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char buf[MAX_REGISTER_RAW_SIZE];
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register int i;
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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 (PT_RUAREA, inferior_pid,
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(PTRACE_ARG3_TYPE) regaddr, 0, 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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return;
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}
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static void
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store_inferior_register_1 (regno, regaddr, val)
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int regno;
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unsigned int regaddr;
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int val;
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{
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errno = 0;
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ptrace (PT_WUAREA, inferior_pid, (PTRACE_ARG3_TYPE) regaddr, val, 0);
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#if 0
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/* HP-UX randomly sets errno to non-zero for regno == 25.
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However, the value is correctly written, so ignore errno. */
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if (errno != 0)
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{
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char string_buf[64];
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sprintf (string_buf, "writing register number %d", regno);
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perror_with_name (string_buf);
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}
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#endif
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return;
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}
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static void
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store_inferior_register (regno, regaddr)
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register int regno;
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register unsigned int regaddr;
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{
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#ifndef HPUX_VERSION_5
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if (regno == PS_REGNUM)
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{
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union { int i; short s[2]; } ps_val;
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ps_val.i = (ptrace (PT_RUAREA, inferior_pid, (PTRACE_ARG3_TYPE) regaddr,
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0, 0));
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ps_val.s[0] = (read_register (regno));
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store_inferior_register_1 (regno, regaddr, ps_val.i);
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}
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else
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#endif /* not HPUX_VERSION_5 */
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{
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char buf[MAX_REGISTER_RAW_SIZE];
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register int i;
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extern char registers[];
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for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
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{
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store_inferior_register_1
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(regno, regaddr,
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(*(int *) ®isters[(REGISTER_BYTE (regno)) + i]));
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regaddr += sizeof (int);
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}
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}
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return;
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}
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void
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fetch_inferior_registers (regno)
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int regno;
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{
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struct user u;
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register unsigned int ar0_offset;
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ar0_offset = (INFERIOR_AR0 (u));
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if (regno == -1)
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{
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for (regno = 0; (regno < FP0_REGNUM); regno++)
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fetch_inferior_register (regno, (REGISTER_ADDR (ar0_offset, regno)));
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for (; (regno < NUM_REGS); regno++)
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fetch_inferior_register (regno, (FP_REGISTER_ADDR (u, regno)));
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}
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else
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fetch_inferior_register (regno,
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(regno < FP0_REGNUM
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? REGISTER_ADDR (ar0_offset, regno)
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: FP_REGISTER_ADDR (u, regno)));
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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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register int regno;
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{
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struct user u;
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register unsigned int ar0_offset;
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extern char registers[];
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if (regno >= FP0_REGNUM)
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{
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store_inferior_register (regno, (FP_REGISTER_ADDR (u, regno)));
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return;
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}
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ar0_offset = (INFERIOR_AR0 (u));
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if (regno >= 0)
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{
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store_inferior_register (regno, (REGISTER_ADDR (ar0_offset, regno)));
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return;
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}
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for (regno = 0; (regno < FP0_REGNUM); regno++)
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store_inferior_register (regno, (REGISTER_ADDR (ar0_offset, regno)));
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for (; (regno < NUM_REGS); regno++)
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store_inferior_register (regno, (FP_REGISTER_ADDR (u, regno)));
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return;
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}
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#if 0
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/* This function is no longer used. The version in coredep.c is used
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instead. */
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/* Take the register values out of a core file and store
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them where `read_register' will find them. */
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#ifdef HPUX_VERSION_5
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#define e_PS e_regs[PS]
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#define e_PC e_regs[PC]
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#endif /* HPUX_VERSION_5 */
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void
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fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
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char *core_reg_sect;
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unsigned int core_reg_size;
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int which;
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unsigned int reg_addr; /* Unused in this version */
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{
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int val, regno;
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struct user u;
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struct exception_stack *pes = (struct exception_stack *) core_reg_sect;
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#define es (*pes)
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char *buf;
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if (which == 0) {
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if (core_reg_size <
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((char *) &es.e_offset - (char *) &es.e_regs[R0]))
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error ("Not enough registers in core file");
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for (regno = 0; (regno < PS_REGNUM); regno++)
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supply_register (regno, (char *) &es.e_regs[regno + R0]);
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val = es.e_PS;
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supply_register (regno++, (char *) &val);
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supply_register (regno++, (char *) &es.e_PC);
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} else if (which == 2) {
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/* FIXME: This may not work if the float regs and control regs are
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discontinuous. */
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for (regno = FP0_REGNUM, buf = core_reg_sect;
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(regno < NUM_REGS);
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buf += REGISTER_RAW_SIZE (regno), regno++)
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{
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supply_register (regno, buf);
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}
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}
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}
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#endif /* 0 */
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int
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getpagesize ()
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{
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return 4096;
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}
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