/* Host-dependent code for GDB, for NYU Ultra3 running Sym1 OS. Copyright (C) 1988, 1989, 1991 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ #define DEBUG #include <stdio.h> #include "defs.h" #include "param.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 <sys/stat.h> #include <sys/ptrace.h> /* 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; /* * 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, (int*)register_addr(regno,0), 0); if (errno != 0) { sprintf(buf,"reading register %s (#%d)",reg_names[regno],regno); perror_with_name (buf); } else { supply_register (regno, &val); } } } /* 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, (int*)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, (int*)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. */ int store_inferior_registers (regno) int regno; { register unsigned int regaddr; char buf[80]; if (regno >= 0) { if (CANNOT_STORE_REGISTER(regno)) return 0; /* Pretend success */ regaddr = register_addr (regno, 0); errno = 0; ptrace (PT_WRITE_U, inferior_pid,(int*)regaddr,read_register(regno)); if (errno != 0) { sprintf (buf, "writing register %s (#%d)", reg_names[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, (int*)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, (int*)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 -1; } #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 */ } return 0; } /* * Read AMD's Binary Compatibilty Standard conforming core file. * struct ptrace_user is the first thing in the core file */ void fetch_core_registers () { 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, register_addr (regno, 0), 0); if (val < 0 || (val = bfd_read (buf, sizeof buf, 1, core_bfd)) < 0) { char * buffer = (char *) alloca (strlen (reg_names[regno]) + 35); strcpy (buffer, "Reading core register "); strcat (buffer, reg_names[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. */ unsigned int register_addr (regno,blockend) unsigned int regno; char *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(stderr,"register_addr():Bad register %s (%d)\n", reg_names[regno],regno); return(0xffffffff); /* Should make ptrace() fail */ } } } /* Assorted operating system circumventions */ #ifdef SYM1 /* FIXME: Kludge this for now. It really should be system call. */ int getpagesize() { return(8192); } /* FIXME: Fake out the fcntl() call, which we don't have. */ fcntl(fd, cmd, arg) int fd, cmd, arg; { switch (cmd) { case F_GETFL: return(O_RDONLY); break; default: printf("Ultra3's fcntl() failing, cmd = %d.\n",cmd); return(-1); } } /* * 4.2 Signal support, requires linking with libjobs. */ static int _SigMask; #define sigbit(s) (1L << ((s)-1)) init_SigMask() { /* Taken from the sym1 kernel in machdep.c:startup() */ _SigMask = sigbit (SIGTSTP) | sigbit (SIGTTOU) | sigbit (SIGTTIN) | sigbit (SIGCHLD) | sigbit (SIGTINT); } sigmask(signo) int signo; { return (1 << (signo-1)); } sigsetmask(sigmask) unsigned int sigmask; { int i, mask = 1; int lastmask = _SigMask; for (i=0 ; i<NSIG ; i++) { if (sigmask & mask) { if (!(_SigMask & mask)) { sighold(i+1); _SigMask |= mask; } } else if (_SigMask & mask) { sigrelse(i+1); _SigMask &= ~mask; } mask <<= 1; } return (lastmask); } sigblock(sigmask) unsigned int sigmask; { int i, mask = 1; int lastmask = _SigMask; for (i=0 ; i<NSIG ; i++) { if ((sigmask & mask) && !(_SigMask & mask)) { sighold(i+1); _SigMask |= mask; } mask <<= 1; } return (lastmask); } #endif /* SYM1 */ /* Initialization code for this module. */ _initialize_ultra3 () { #ifdef SYM1 init_SigMask(); #endif }