diff options
Diffstat (limited to 'gdb/vax-bsd-nat.c')
| -rw-r--r-- | gdb/vax-bsd-nat.c | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/gdb/vax-bsd-nat.c b/gdb/vax-bsd-nat.c new file mode 100644 index 0000000..60069b2 --- /dev/null +++ b/gdb/vax-bsd-nat.c @@ -0,0 +1,146 @@ +/* Native-dependent code for modern VAX BSD's. + + Copyright (C) 2004-2016 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 3 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, see <http://www.gnu.org/licenses/>. */ + +#include "defs.h" +#include "inferior.h" +#include "regcache.h" +#include "target.h" + +#include <sys/types.h> +#include <sys/ptrace.h> +#include <machine/reg.h> + +#include "vax-tdep.h" +#include "inf-ptrace.h" + +/* Supply the general-purpose registers stored in GREGS to REGCACHE. */ + +static void +vaxbsd_supply_gregset (struct regcache *regcache, const void *gregs) +{ + const gdb_byte *regs = gregs; + int regnum; + + for (regnum = 0; regnum < VAX_NUM_REGS; regnum++) + regcache_raw_supply (regcache, regnum, regs + regnum * 4); +} + +/* Collect the general-purpose registers from REGCACHE and store them + in GREGS. */ + +static void +vaxbsd_collect_gregset (const struct regcache *regcache, + void *gregs, int regnum) +{ + gdb_byte *regs = gregs; + int i; + + for (i = 0; i <= VAX_NUM_REGS; i++) + { + if (regnum == -1 || regnum == i) + regcache_raw_collect (regcache, i, regs + i * 4); + } +} + + +/* Fetch register REGNUM from the inferior. If REGNUM is -1, do this + for all registers. */ + +static void +vaxbsd_fetch_inferior_registers (struct target_ops *ops, + struct regcache *regcache, int regnum) +{ + struct reg regs; + + if (ptrace (PT_GETREGS, ptid_get_pid (inferior_ptid), + (PTRACE_TYPE_ARG3) ®s, 0) == -1) + perror_with_name (_("Couldn't get registers")); + + vaxbsd_supply_gregset (regcache, ®s); +} + +/* Store register REGNUM back into the inferior. If REGNUM is -1, do + this for all registers. */ + +static void +vaxbsd_store_inferior_registers (struct target_ops *ops, + struct regcache *regcache, int regnum) +{ + struct reg regs; + + if (ptrace (PT_GETREGS, ptid_get_pid (inferior_ptid), + (PTRACE_TYPE_ARG3) ®s, 0) == -1) + perror_with_name (_("Couldn't get registers")); + + vaxbsd_collect_gregset (regcache, ®s, regnum); + + if (ptrace (PT_SETREGS, ptid_get_pid (inferior_ptid), + (PTRACE_TYPE_ARG3) ®s, 0) == -1) + perror_with_name (_("Couldn't write registers")); +} + + +/* Support for debugging kernel virtual memory images. */ + +#include <machine/pcb.h> + +#include "bsd-kvm.h" + +static int +vaxbsd_supply_pcb (struct regcache *regcache, struct pcb *pcb) +{ + int regnum; + + /* The following is true for OpenBSD 3.5: + + The pcb contains the register state at the context switch inside + cpu_switch(). */ + + /* The stack pointer shouldn't be zero. */ + if (pcb->KSP == 0) + return 0; + + for (regnum = VAX_R0_REGNUM; regnum < VAX_AP_REGNUM; regnum++) + regcache_raw_supply (regcache, regnum, &pcb->R[regnum - VAX_R0_REGNUM]); + regcache_raw_supply (regcache, VAX_AP_REGNUM, &pcb->AP); + regcache_raw_supply (regcache, VAX_FP_REGNUM, &pcb->FP); + regcache_raw_supply (regcache, VAX_SP_REGNUM, &pcb->KSP); + regcache_raw_supply (regcache, VAX_PC_REGNUM, &pcb->PC); + regcache_raw_supply (regcache, VAX_PS_REGNUM, &pcb->PSL); + + return 1; +} + + +/* Provide a prototype to silence -Wmissing-prototypes. */ +void _initialize_vaxbsd_nat (void); + +void +_initialize_vaxbsd_nat (void) +{ + struct target_ops *t; + + t = inf_ptrace_target (); + t->to_fetch_registers = vaxbsd_fetch_inferior_registers; + t->to_store_registers = vaxbsd_store_inferior_registers; + add_target (t); + + /* Support debugging kernel virtual memory images. */ + bsd_kvm_add_target (vaxbsd_supply_pcb); +} |