Home | History | Annotate | Line # | Download | only in gdb 
      1 /* Native-dependent code for OpenBSD/sparc64.
      2 
      3    Copyright (C) 2003-2024 Free Software Foundation, Inc.
      4 
      5    This file is part of GDB.
      6 
      7    This program is free software; you can redistribute it and/or modify
      8    it under the terms of the GNU General Public License as published by
      9    the Free Software Foundation; either version 3 of the License, or
     10    (at your option) any later version.
     11 
     12    This program is distributed in the hope that it will be useful,
     13    but WITHOUT ANY WARRANTY; without even the implied warranty of
     14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     15    GNU General Public License for more details.
     16 
     17    You should have received a copy of the GNU General Public License
     18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
     19 
     20 #include "gdbcore.h"
     21 #include "regcache.h"
     22 #include "target.h"
     23 
     24 #include "sparc64-tdep.h"
     25 #include "sparc-nat.h"
     26 #include "obsd-nat.h"
     27 
     28 /* Determine whether `gregset_t' contains register REGNUM.  */
     29 
     30 static int
     31 sparc64obsd_gregset_supplies_p (struct gdbarch *gdbarch, int regnum)
     32 {
     33   /* Integer registers.  */
     34   if ((regnum >= SPARC_G1_REGNUM && regnum <= SPARC_G7_REGNUM)
     35       || (regnum >= SPARC_O0_REGNUM && regnum <= SPARC_O7_REGNUM)
     36       || (regnum >= SPARC_L0_REGNUM && regnum <= SPARC_L7_REGNUM)
     37       || (regnum >= SPARC_I0_REGNUM && regnum <= SPARC_I7_REGNUM))
     38     return 1;
     39 
     40   /* Control registers.  */
     41   if (regnum == SPARC64_PC_REGNUM
     42       || regnum == SPARC64_NPC_REGNUM
     43       || regnum == SPARC64_STATE_REGNUM
     44       || regnum == SPARC64_Y_REGNUM)
     45     return 1;
     46 
     47   return 0;
     48 }
     49 
     50 /* Determine whether `fpregset_t' contains register REGNUM.  */
     51 
     52 static int
     53 sparc64obsd_fpregset_supplies_p (struct gdbarch *gdbarch, int regnum)
     54 {
     55   /* Floating-point registers.  */
     56   if ((regnum >= SPARC_F0_REGNUM && regnum <= SPARC_F31_REGNUM)
     57       || (regnum >= SPARC64_F32_REGNUM && regnum <= SPARC64_F62_REGNUM))
     58     return 1;
     59 
     60   /* Control registers.  */
     61   if (regnum == SPARC64_FSR_REGNUM)
     62     return 1;
     63 
     64   return 0;
     65 }
     66 
     67 
     69 /* Support for debugging kernel virtual memory images.  */
     70 
     71 #include <sys/types.h>
     72 #include <machine/pcb.h>
     73 
     74 #include "bsd-kvm.h"
     75 
     76 static int
     77 sparc64obsd_supply_pcb (struct regcache *regcache, struct pcb *pcb)
     78 {
     79   u_int64_t state;
     80   int regnum;
     81 
     82   /* The following is true for OpenBSD 3.0:
     83 
     84      The pcb contains %sp and %pc, %pstate and %cwp.  From this
     85      information we reconstruct the register state as it would look
     86      when we just returned from cpu_switch().  */
     87 
     88   /* The stack pointer shouldn't be zero.  */
     89   if (pcb->pcb_sp == 0)
     90     return 0;
     91 
     92   /* If the program counter is zero, this is probably a core dump, and
     93      we can get %pc from the stack.  */
     94   if (pcb->pcb_pc == 0)
     95       read_memory(pcb->pcb_sp + BIAS - 176 + (11 * 8),
     96 		  (gdb_byte *)&pcb->pcb_pc, sizeof pcb->pcb_pc);
     97 
     98   regcache->raw_supply (SPARC_SP_REGNUM, &pcb->pcb_sp);
     99   regcache->raw_supply (SPARC64_PC_REGNUM, &pcb->pcb_pc);
    100 
    101   state = pcb->pcb_pstate << 8 | pcb->pcb_cwp;
    102   regcache->raw_supply (SPARC64_STATE_REGNUM, &state);
    103 
    104   sparc_supply_rwindow (regcache, pcb->pcb_sp, -1);
    105 
    106   return 1;
    107 }
    108 
    109 /* Add some extra features to the generic SPARC target.  */
    110 static sparc_target<obsd_nat_target> the_sparc64_obsd_nat_target;
    111 
    112 void _initialize_sparc64obsd_nat ();
    113 void
    114 _initialize_sparc64obsd_nat ()
    115 {
    116   sparc_supply_gregset = sparc64_supply_gregset;
    117   sparc_collect_gregset = sparc64_collect_gregset;
    118   sparc_supply_fpregset = sparc64_supply_fpregset;
    119   sparc_collect_fpregset = sparc64_collect_fpregset;
    120   sparc_gregset_supplies_p = sparc64obsd_gregset_supplies_p;
    121   sparc_fpregset_supplies_p = sparc64obsd_fpregset_supplies_p;
    122 
    123   sparc_gregmap = &sparc64nbsd_gregmap;
    124   sparc_fpregmap = &sparc64_bsd_fpregmap;
    125 
    126   /* Add some extra features to the generic SPARC target.  */
    127   add_inf_child_target (&the_sparc64_obsd_nat_target);
    128 
    129   /* Support debugging kernel virtual memory images.  */
    130   bsd_kvm_add_target (sparc64obsd_supply_pcb);
    131 }
    132