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authorStan Shebs <shebs@codesourcery.com>1999-04-16 01:34:07 +0000
committerStan Shebs <shebs@codesourcery.com>1999-04-16 01:34:07 +0000
commit071ea11e85eb9d529cc5eb3d35f6247466a21b99 (patch)
tree5deda65b8d7b04d1f4cbc534c3206d328e1267ec /gdb/ultra3-nat.c
parent1730ec6b1848f0f32154277f788fb29f88d8475b (diff)
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Initial creation of sourceware repository
Diffstat (limited to 'gdb/ultra3-nat.c')
-rw-r--r--gdb/ultra3-nat.c329
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diff --git a/gdb/ultra3-nat.c b/gdb/ultra3-nat.c
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-/* Native-dependent code for GDB, for NYU Ultra3 running Sym1 OS.
- Copyright (C) 1988, 1989, 1991, 1992 Free Software Foundation, Inc.
- Contributed by David Wood (wood@nyu.edu) at New York University.
-
-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. */
-
-#define DEBUG
-#include "defs.h"
-#include "frame.h"
-#include "inferior.h"
-#include "symtab.h"
-#include "value.h"
-
-#include <sys/types.h>
-#include <sys/param.h>
-#include <signal.h>
-#include <sys/ioctl.h>
-#include <fcntl.h>
-
-#include "gdbcore.h"
-
-#include <sys/file.h>
-#include "gdb_stat.h"
-
-static void fetch_core_registers PARAMS ((char *, unsigned, int, CORE_ADDR));
-
-/* Assumes support for AMD's Binary Compatibility Standard
- for ptrace(). If you define ULTRA3, the ultra3 extensions to
- ptrace() are used allowing the reading of more than one register
- at a time.
-
- This file assumes KERNEL_DEBUGGING is turned off. This means
- that if the user/gdb tries to read gr64-gr95 or any of the
- protected special registers we silently return -1 (see the
- CANNOT_STORE/FETCH_REGISTER macros). */
-#define ULTRA3
-
-#if !defined (offsetof)
-# define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER)
-#endif
-
-extern int errno;
-struct ptrace_user pt_struct;
-
-/* Get all available registers from the inferior. Registers that are
- * defined in REGISTER_NAMES, but not available to the user/gdb are
- * supplied as -1. This may include gr64-gr95 and the protected special
- * purpose registers.
- */
-
-void
-fetch_inferior_registers (regno)
- int regno;
-{
- register int i,j,ret_val=0;
- char buf[128];
-
- if (regno != -1) {
- fetch_register (regno);
- return;
- }
-
-/* Global Registers */
-#ifdef ULTRA3
- errno = 0;
- ptrace (PT_READ_STRUCT, inferior_pid,
- (PTRACE_ARG3_TYPE) register_addr(GR96_REGNUM,0),
- (int)&pt_struct.pt_gr[0], 32*4);
- if (errno != 0) {
- perror_with_name ("reading global registers");
- ret_val = -1;
- } else for (regno=GR96_REGNUM, j=0 ; j<32 ; regno++, j++) {
- supply_register (regno, &pt_struct.pt_gr[j]);
- }
-#else
- for (regno=GR96_REGNUM ; !ret_val && regno < GR96_REGNUM+32 ; regno++)
- fetch_register(regno);
-#endif
-
-/* Local Registers */
-#ifdef ULTRA3
- errno = 0;
- ptrace (PT_READ_STRUCT, inferior_pid,
- (PTRACE_ARG3_TYPE) register_addr(LR0_REGNUM,0),
- (int)&pt_struct.pt_lr[0], 128*4);
- if (errno != 0) {
- perror_with_name ("reading local registers");
- ret_val = -1;
- } else for (regno=LR0_REGNUM, j=0 ; j<128 ; regno++, j++) {
- supply_register (regno, &pt_struct.pt_lr[j]);
- }
-#else
- for (regno=LR0_REGNUM ; !ret_val && regno < LR0_REGNUM+128 ; regno++)
- fetch_register(regno);
-#endif
-
-/* Special Registers */
- fetch_register(GR1_REGNUM);
- fetch_register(CPS_REGNUM);
- fetch_register(PC_REGNUM);
- fetch_register(NPC_REGNUM);
- fetch_register(PC2_REGNUM);
- fetch_register(IPC_REGNUM);
- fetch_register(IPA_REGNUM);
- fetch_register(IPB_REGNUM);
- fetch_register(Q_REGNUM);
- fetch_register(BP_REGNUM);
- fetch_register(FC_REGNUM);
-
-/* Fake any registers that are in REGISTER_NAMES, but not available to gdb */
- registers_fetched();
-}
-
-/* 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).
- * NOTE: Assumes AMD's binary compatibility standard.
- */
-
-void
-store_inferior_registers (regno)
- int regno;
-{
- register unsigned int regaddr;
- char buf[80];
-
- if (regno >= 0)
- {
- if (CANNOT_STORE_REGISTER(regno))
- return;
- regaddr = register_addr (regno, 0);
- errno = 0;
- ptrace (PT_WRITE_U, inferior_pid,
- (PTRACE_ARG3_TYPE) regaddr, read_register(regno));
- if (errno != 0)
- {
- sprintf (buf, "writing register %s (#%d)", REGISTER_NAME (regno), regno);
- perror_with_name (buf);
- }
- }
- else
- {
-#ifdef ULTRA3
- pt_struct.pt_gr1 = read_register(GR1_REGNUM);
- for (regno = GR96_REGNUM; regno < GR96_REGNUM+32; regno++)
- pt_struct.pt_gr[regno] = read_register(regno);
- for (regno = LR0_REGNUM; regno < LR0_REGNUM+128; regno++)
- pt_struct.pt_gr[regno] = read_register(regno);
- errno = 0;
- ptrace (PT_WRITE_STRUCT, inferior_pid,
- (PTRACE_ARG3_TYPE) register_addr(GR1_REGNUM,0),
- (int)&pt_struct.pt_gr1,(1*32*128)*4);
- if (errno != 0)
- {
- sprintf (buf, "writing all local/global registers");
- perror_with_name (buf);
- }
- pt_struct.pt_psr = read_register(CPS_REGNUM);
- pt_struct.pt_pc0 = read_register(NPC_REGNUM);
- pt_struct.pt_pc1 = read_register(PC_REGNUM);
- pt_struct.pt_pc2 = read_register(PC2_REGNUM);
- pt_struct.pt_ipc = read_register(IPC_REGNUM);
- pt_struct.pt_ipa = read_register(IPA_REGNUM);
- pt_struct.pt_ipb = read_register(IPB_REGNUM);
- pt_struct.pt_q = read_register(Q_REGNUM);
- pt_struct.pt_bp = read_register(BP_REGNUM);
- pt_struct.pt_fc = read_register(FC_REGNUM);
- errno = 0;
- ptrace (PT_WRITE_STRUCT, inferior_pid,
- (PTRACE_ARG3_TYPE) register_addr(CPS_REGNUM,0),
- (int)&pt_struct.pt_psr,(10)*4);
- if (errno != 0)
- {
- sprintf (buf, "writing all special registers");
- perror_with_name (buf);
- return;
- }
-#else
- store_inferior_registers(GR1_REGNUM);
- for (regno=GR96_REGNUM ; regno<GR96_REGNUM+32 ; regno++)
- store_inferior_registers(regno);
- for (regno=LR0_REGNUM ; regno<LR0_REGNUM+128 ; regno++)
- store_inferior_registers(regno);
- store_inferior_registers(CPS_REGNUM);
- store_inferior_registers(PC_REGNUM);
- store_inferior_registers(NPC_REGNUM);
- store_inferior_registers(PC2_REGNUM);
- store_inferior_registers(IPC_REGNUM);
- store_inferior_registers(IPA_REGNUM);
- store_inferior_registers(IPB_REGNUM);
- store_inferior_registers(Q_REGNUM);
- store_inferior_registers(BP_REGNUM);
- store_inferior_registers(FC_REGNUM);
-#endif /* ULTRA3 */
- }
-}
-
-/*
- * Fetch an individual register (and supply it).
- * return 0 on success, -1 on failure.
- * NOTE: Assumes AMD's Binary Compatibility Standard for ptrace().
- */
-static void
-fetch_register (regno)
- int regno;
-{
- char buf[128];
- int val;
-
- if (CANNOT_FETCH_REGISTER(regno)) {
- val = -1;
- supply_register (regno, &val);
- } else {
- errno = 0;
- val = ptrace (PT_READ_U, inferior_pid,
- (PTRACE_ARG3_TYPE) register_addr(regno,0), 0);
- if (errno != 0) {
- sprintf(buf,"reading register %s (#%d)",REGISTER_NAME (regno), regno);
- perror_with_name (buf);
- } else {
- supply_register (regno, &val);
- }
- }
-}
-
-
-/*
- * Read AMD's Binary Compatibilty Standard conforming core file.
- * struct ptrace_user is the first thing in the core file
- */
-
-static void
-fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
- char *core_reg_sect; /* Unused in this version */
- unsigned core_reg_size; /* Unused in this version */
- int which; /* Unused in this version */
- CORE_ADDR reg_addr; /* Unused in this version */
-{
- register int regno;
- int val;
- char buf[4];
-
- for (regno = 0 ; regno < NUM_REGS; regno++) {
- if (!CANNOT_FETCH_REGISTER(regno)) {
- val = bfd_seek (core_bfd, (file_ptr) register_addr (regno, 0), SEEK_SET);
- if (val < 0 || (val = bfd_read (buf, sizeof buf, 1, core_bfd)) < 0) {
- char * buffer = (char *) alloca (strlen (REGISTER_NAME (regno)) + 35);
- strcpy (buffer, "Reading core register ");
- strcat (buffer, REGISTER_NAME (regno));
- perror_with_name (buffer);
- }
- supply_register (regno, buf);
- }
- }
-
- /* Fake any registers that are in REGISTER_NAMES, but not available to gdb */
- registers_fetched();
-}
-
-
-/*
- * Takes a register number as defined in tm.h via REGISTER_NAMES, and maps
- * it to an offset in a struct ptrace_user defined by AMD's BCS.
- * That is, it defines the mapping between gdb register numbers and items in
- * a struct ptrace_user.
- * A register protection scheme is set up here. If a register not
- * available to the user is specified in 'regno', then an address that
- * will cause ptrace() to fail is returned.
- */
-CORE_ADDR
-register_addr (regno,blockend)
- int regno;
- CORE_ADDR blockend;
-{
- if ((regno >= LR0_REGNUM) && (regno < LR0_REGNUM + 128)) {
- return(offsetof(struct ptrace_user,pt_lr[regno-LR0_REGNUM]));
- } else if ((regno >= GR96_REGNUM) && (regno < GR96_REGNUM + 32)) {
- return(offsetof(struct ptrace_user,pt_gr[regno-GR96_REGNUM]));
- } else {
- switch (regno) {
- case GR1_REGNUM: return(offsetof(struct ptrace_user,pt_gr1));
- case CPS_REGNUM: return(offsetof(struct ptrace_user,pt_psr));
- case NPC_REGNUM: return(offsetof(struct ptrace_user,pt_pc0));
- case PC_REGNUM: return(offsetof(struct ptrace_user,pt_pc1));
- case PC2_REGNUM: return(offsetof(struct ptrace_user,pt_pc2));
- case IPC_REGNUM: return(offsetof(struct ptrace_user,pt_ipc));
- case IPA_REGNUM: return(offsetof(struct ptrace_user,pt_ipa));
- case IPB_REGNUM: return(offsetof(struct ptrace_user,pt_ipb));
- case Q_REGNUM: return(offsetof(struct ptrace_user,pt_q));
- case BP_REGNUM: return(offsetof(struct ptrace_user,pt_bp));
- case FC_REGNUM: return(offsetof(struct ptrace_user,pt_fc));
- default:
- fprintf_filtered(gdb_stderr,"register_addr():Bad register %s (%d)\n",
- REGISTER_NAME (regno), regno);
- return(0xffffffff); /* Should make ptrace() fail */
- }
- }
-}
-
-
-/* Register that we are able to handle ultra3 core file formats.
- FIXME: is this really bfd_target_unknown_flavour? */
-
-static struct core_fns ultra3_core_fns =
-{
- bfd_target_unknown_flavour,
- fetch_core_registers,
- NULL
-};
-
-void
-_initialize_core_ultra3 ()
-{
- add_core_fns (&ultra3_core_fns);
-}