diff options
Diffstat (limited to 'contrib/gdb/gdb/alphabsd-nat.c')
| -rw-r--r-- | contrib/gdb/gdb/alphabsd-nat.c | 211 |
1 files changed, 211 insertions, 0 deletions
diff --git a/contrib/gdb/gdb/alphabsd-nat.c b/contrib/gdb/gdb/alphabsd-nat.c new file mode 100644 index 0000000..d7ad3a7 --- /dev/null +++ b/contrib/gdb/gdb/alphabsd-nat.c @@ -0,0 +1,211 @@ +/* Native-dependent code for Alpha BSD's. + Copyright 2000, 2001, 2002 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 "inferior.h" +#include "regcache.h" + +#include <sys/types.h> +#include <sys/ptrace.h> +#include <machine/reg.h> + +#ifdef HAVE_SYS_PROCFS_H +#include <sys/procfs.h> +#endif + +#ifndef HAVE_GREGSET_T +typedef struct reg gregset_t; +#endif + +#ifndef HAVE_FPREGSET_T +typedef struct fpreg fpregset_t; +#endif + +#include "gregset.h" + +/* Number of general-purpose registers. */ +#define NUM_GREGS 32 + +/* Number of floating point registers. */ +#define NUM_FPREGS 31 + + +/* Transfering the registers between GDB, inferiors and core files. */ + +/* Fill GDB's register array with the general-purpose register values + in *GREGSETP. */ + +void +supply_gregset (gregset_t *gregsetp) +{ + int i; + + for (i = 0; i < NUM_GREGS; i++) + { + if (CANNOT_FETCH_REGISTER (i)) + supply_register (i, NULL); + else + supply_register (i, (char *) &gregsetp->r_regs[i]); + } + + /* The PC travels in the R_ZERO slot. */ + supply_register (PC_REGNUM, (char *) &gregsetp->r_regs[R_ZERO]); +} + +/* Fill register REGNO (if it is a general-purpose register) in + *GREGSETPS with the value in GDB's register array. If REGNO is -1, + do this for all registers. */ + +void +fill_gregset (gregset_t *gregsetp, int regno) +{ + int i; + + for (i = 0; i < NUM_GREGS; i++) + if ((regno == -1 || regno == i) && ! CANNOT_STORE_REGISTER (i)) + regcache_collect (i, (char *) &gregsetp->r_regs[i]); + + /* The PC travels in the R_ZERO slot. */ + if (regno == -1 || regno == PC_REGNUM) + regcache_collect (PC_REGNUM, (char *) &gregsetp->r_regs[R_ZERO]); +} + +/* Fill GDB's register array with the floating-point register values + in *FPREGSETP. */ + +void +supply_fpregset (fpregset_t *fpregsetp) +{ + int i; + + for (i = FP0_REGNUM; i < FP0_REGNUM + NUM_FPREGS; i++) + { + if (CANNOT_FETCH_REGISTER (i)) + supply_register (i, NULL); + else + supply_register (i, (char *) &fpregsetp->fpr_regs[i - FP0_REGNUM]); + } + + supply_register (FPCR_REGNUM, (char *) &fpregsetp->fpr_cr); +} + +/* Fill register REGNO (if it is a floating-point register) in + *FPREGSETP with the value in GDB's register array. If REGNO is -1, + do this for all registers. */ + +void +fill_fpregset (fpregset_t *fpregsetp, int regno) +{ + int i; + + for (i = FP0_REGNUM; i < FP0_REGNUM + NUM_FPREGS; i++) + if ((regno == -1 || regno == i) && ! CANNOT_STORE_REGISTER (i)) + regcache_collect (i, (char *) &fpregsetp->fpr_regs[i - FP0_REGNUM]); + + if (regno == -1 || regno == FPCR_REGNUM) + regcache_collect (FPCR_REGNUM, (char *) &fpregsetp->fpr_cr); +} + + +/* Determine if PT_GETREGS fetches this register. */ + +static int +getregs_supplies (int regno) +{ + + return ((regno >= V0_REGNUM && regno <= ZERO_REGNUM) + || regno >= PC_REGNUM); +} + + +/* Fetch register REGNO from the inferior. If REGNO is -1, do this + for all registers (including the floating point registers). */ + +void +fetch_inferior_registers (int regno) +{ + + if (regno == -1 || getregs_supplies (regno)) + { + gregset_t gregs; + + if (ptrace (PT_GETREGS, PIDGET (inferior_ptid), + (PTRACE_ARG3_TYPE) &gregs, 0) == -1) + perror_with_name ("Couldn't get registers"); + + supply_gregset (&gregs); + if (regno != -1) + return; + } + + if (regno == -1 || regno >= FP0_REGNUM) + { + fpregset_t fpregs; + + if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid), + (PTRACE_ARG3_TYPE) &fpregs, 0) == -1) + perror_with_name ("Couldn't get floating point status"); + + supply_fpregset (&fpregs); + } + + /* Reset virtual frame pointer. */ + supply_register (FP_REGNUM, NULL); +} + +/* Store register REGNO back into the inferior. If REGNO is -1, do + this for all registers (including the floating point registers). */ + +void +store_inferior_registers (int regno) +{ + + if (regno == -1 || getregs_supplies (regno)) + { + gregset_t gregs; + if (ptrace (PT_GETREGS, PIDGET (inferior_ptid), + (PTRACE_ARG3_TYPE) &gregs, 0) == -1) + perror_with_name ("Couldn't get registers"); + + fill_gregset (&gregs, regno); + + if (ptrace (PT_SETREGS, PIDGET (inferior_ptid), + (PTRACE_ARG3_TYPE) &gregs, 0) == -1) + perror_with_name ("Couldn't write registers"); + + if (regno != -1) + return; + } + + if (regno == -1 || regno >= FP0_REGNUM) + { + fpregset_t fpregs; + + if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid), + (PTRACE_ARG3_TYPE) &fpregs, 0) == -1) + perror_with_name ("Couldn't get floating point status"); + + fill_fpregset (&fpregs, regno); + + if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid), + (PTRACE_ARG3_TYPE) &fpregs, 0) == -1) + perror_with_name ("Couldn't write floating point status"); + } +} |
