| 1 | /* Native-dependent code for OpenBSD/sparc64. |
| 2 | |
| 3 | Copyright (C) 2003-2015 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 "defs.h" |
| 21 | #include "gdbcore.h" |
| 22 | #include "regcache.h" |
| 23 | #include "target.h" |
| 24 | |
| 25 | #include "sparc64-tdep.h" |
| 26 | #include "sparc-nat.h" |
| 27 | #include "obsd-nat.h" |
| 28 | |
| 29 | /* Determine whether `gregset_t' contains register REGNUM. */ |
| 30 | |
| 31 | static int |
| 32 | sparc64obsd_gregset_supplies_p (struct gdbarch *gdbarch, int regnum) |
| 33 | { |
| 34 | /* Integer registers. */ |
| 35 | if ((regnum >= SPARC_G1_REGNUM && regnum <= SPARC_G7_REGNUM) |
| 36 | || (regnum >= SPARC_O0_REGNUM && regnum <= SPARC_O7_REGNUM) |
| 37 | || (regnum >= SPARC_L0_REGNUM && regnum <= SPARC_L7_REGNUM) |
| 38 | || (regnum >= SPARC_I0_REGNUM && regnum <= SPARC_I7_REGNUM)) |
| 39 | return 1; |
| 40 | |
| 41 | /* Control registers. */ |
| 42 | if (regnum == SPARC64_PC_REGNUM |
| 43 | || regnum == SPARC64_NPC_REGNUM |
| 44 | || regnum == SPARC64_STATE_REGNUM |
| 45 | || regnum == SPARC64_Y_REGNUM) |
| 46 | return 1; |
| 47 | |
| 48 | return 0; |
| 49 | } |
| 50 | |
| 51 | /* Determine whether `fpregset_t' contains register REGNUM. */ |
| 52 | |
| 53 | static int |
| 54 | sparc64obsd_fpregset_supplies_p (struct gdbarch *gdbarch, int regnum) |
| 55 | { |
| 56 | /* Floating-point registers. */ |
| 57 | if ((regnum >= SPARC_F0_REGNUM && regnum <= SPARC_F31_REGNUM) |
| 58 | || (regnum >= SPARC64_F32_REGNUM && regnum <= SPARC64_F62_REGNUM)) |
| 59 | return 1; |
| 60 | |
| 61 | /* Control registers. */ |
| 62 | if (regnum == SPARC64_FSR_REGNUM) |
| 63 | return 1; |
| 64 | |
| 65 | return 0; |
| 66 | } |
| 67 | \f |
| 68 | |
| 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 (regcache, SPARC_SP_REGNUM, &pcb->pcb_sp); |
| 99 | regcache_raw_supply (regcache, SPARC64_PC_REGNUM, &pcb->pcb_pc); |
| 100 | |
| 101 | state = pcb->pcb_pstate << 8 | pcb->pcb_cwp; |
| 102 | regcache_raw_supply (regcache, SPARC64_STATE_REGNUM, &state); |
| 103 | |
| 104 | sparc_supply_rwindow (regcache, pcb->pcb_sp, -1); |
| 105 | |
| 106 | return 1; |
| 107 | } |
| 108 | |
| 109 | \f |
| 110 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
| 111 | void _initialize_sparc64obsd_nat (void); |
| 112 | |
| 113 | void |
| 114 | _initialize_sparc64obsd_nat (void) |
| 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 | obsd_add_target (sparc_target ()); |
| 128 | |
| 129 | /* Support debugging kernel virtual memory images. */ |
| 130 | bsd_kvm_add_target (sparc64obsd_supply_pcb); |
| 131 | } |