| /* 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); |
| } |