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Diffstat (limited to 'gdb/sparc64-nbsd-nat.c')
| -rw-r--r-- | gdb/sparc64-nbsd-nat.c | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/gdb/sparc64-nbsd-nat.c b/gdb/sparc64-nbsd-nat.c new file mode 100644 index 0000000..696bdcb --- /dev/null +++ b/gdb/sparc64-nbsd-nat.c @@ -0,0 +1,189 @@ +/* Native-dependent code for NetBSD/sparc64. + + Copyright (C) 2003-2016 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 "gdbcore.h" +#include "regcache.h" +#include "target.h" + +#include "sparc64-tdep.h" +#include "sparc-nat.h" + +/* NetBSD is different from the other OSes that support both SPARC and + UltraSPARC in that the result of ptrace(2) depends on whether the + traced process is 32-bit or 64-bit. */ + +static void +sparc64nbsd_supply_gregset (const struct sparc_gregmap *gregmap, + struct regcache *regcache, + int regnum, const void *gregs) +{ + int sparc32 = (gdbarch_ptr_bit (get_regcache_arch (regcache)) == 32); + + if (sparc32) + sparc32_supply_gregset (&sparc32nbsd_gregmap, regcache, regnum, gregs); + else + sparc64_supply_gregset (&sparc64nbsd_gregmap, regcache, regnum, gregs); +} + +static void +sparc64nbsd_collect_gregset (const struct sparc_gregmap *gregmap, + const struct regcache *regcache, + int regnum, void *gregs) +{ + int sparc32 = (gdbarch_ptr_bit (get_regcache_arch (regcache)) == 32); + + if (sparc32) + sparc32_collect_gregset (&sparc32nbsd_gregmap, regcache, regnum, gregs); + else + sparc64_collect_gregset (&sparc64nbsd_gregmap, regcache, regnum, gregs); +} + +static void +sparc64nbsd_supply_fpregset (const struct sparc_fpregmap *fpregmap, + struct regcache *regcache, + int regnum, const void *fpregs) +{ + int sparc32 = (gdbarch_ptr_bit (get_regcache_arch (regcache)) == 32); + + if (sparc32) + sparc32_supply_fpregset (&sparc32_bsd_fpregmap, regcache, regnum, fpregs); + else + sparc64_supply_fpregset (&sparc64_bsd_fpregmap, regcache, regnum, fpregs); +} + +static void +sparc64nbsd_collect_fpregset (const struct sparc_fpregmap *fpregmap, + const struct regcache *regcache, + int regnum, void *fpregs) +{ + int sparc32 = (gdbarch_ptr_bit (get_regcache_arch (regcache)) == 32); + + if (sparc32) + sparc32_collect_fpregset (&sparc32_bsd_fpregmap, regcache, regnum, fpregs); + else + sparc64_collect_fpregset (&sparc64_bsd_fpregmap, regcache, regnum, fpregs); +} + +/* Determine whether `gregset_t' contains register REGNUM. */ + +static int +sparc64nbsd_gregset_supplies_p (struct gdbarch *gdbarch, int regnum) +{ + if (gdbarch_ptr_bit (gdbarch) == 32) + return sparc32_gregset_supplies_p (gdbarch, regnum); + + /* Integer registers. */ + if ((regnum >= SPARC_G1_REGNUM && regnum <= SPARC_G7_REGNUM) + || (regnum >= SPARC_O0_REGNUM && regnum <= SPARC_O7_REGNUM) + || (regnum >= SPARC_L0_REGNUM && regnum <= SPARC_L7_REGNUM) + || (regnum >= SPARC_I0_REGNUM && regnum <= SPARC_I7_REGNUM)) + return 1; + + /* Control registers. */ + if (regnum == SPARC64_PC_REGNUM + || regnum == SPARC64_NPC_REGNUM + || regnum == SPARC64_STATE_REGNUM + || regnum == SPARC64_Y_REGNUM) + return 1; + + return 0; +} + +/* Determine whether `fpregset_t' contains register REGNUM. */ + +static int +sparc64nbsd_fpregset_supplies_p (struct gdbarch *gdbarch, int regnum) +{ + if (gdbarch_ptr_bit (gdbarch) == 32) + return sparc32_fpregset_supplies_p (gdbarch, regnum); + + /* Floating-point registers. */ + if ((regnum >= SPARC_F0_REGNUM && regnum <= SPARC_F31_REGNUM) + || (regnum >= SPARC64_F32_REGNUM && regnum <= SPARC64_F62_REGNUM)) + return 1; + + /* Control registers. */ + if (regnum == SPARC64_FSR_REGNUM) + return 1; + + return 0; +} + + +/* Support for debugging kernel virtual memory images. */ + +#include <sys/types.h> +#include <machine/pcb.h> + +#include "bsd-kvm.h" + +static int +sparc64nbsd_supply_pcb (struct regcache *regcache, struct pcb *pcb) +{ + u_int64_t state; + int regnum; + + /* The following is true for NetBSD 1.6.2: + + The pcb contains %sp and %pc, %pstate and %cwp. From this + information we reconstruct the register state as it would look + when we just returned from cpu_switch(). */ + + /* The stack pointer shouldn't be zero. */ + if (pcb->pcb_sp == 0) + return 0; + + /* If the program counter is zero, this is probably a core dump, and + we can get %pc from the stack. */ + if (pcb->pcb_pc == 0) + read_memory(pcb->pcb_sp + BIAS - 176 + (11 * 8), + (gdb_byte *)&pcb->pcb_pc, sizeof pcb->pcb_pc); + + regcache_raw_supply (regcache, SPARC_SP_REGNUM, &pcb->pcb_sp); + regcache_raw_supply (regcache, SPARC64_PC_REGNUM, &pcb->pcb_pc); + + state = pcb->pcb_pstate << 8 | pcb->pcb_cwp; + regcache_raw_supply (regcache, SPARC64_STATE_REGNUM, &state); + + sparc_supply_rwindow (regcache, pcb->pcb_sp, -1); + + return 1; +} + + +/* Provide a prototype to silence -Wmissing-prototypes. */ +void _initialize_sparc64nbsd_nat (void); + +void +_initialize_sparc64nbsd_nat (void) +{ + sparc_supply_gregset = sparc64nbsd_supply_gregset; + sparc_collect_gregset = sparc64nbsd_collect_gregset; + sparc_supply_fpregset = sparc64nbsd_supply_fpregset; + sparc_collect_fpregset = sparc64nbsd_collect_fpregset; + sparc_gregset_supplies_p = sparc64nbsd_gregset_supplies_p; + sparc_fpregset_supplies_p = sparc64nbsd_fpregset_supplies_p; + + /* We've got nothing to add to the generic SPARC target. */ + add_target (sparc_target ()); + + /* Support debugging kernel virtual memory images. */ + bsd_kvm_add_target (sparc64nbsd_supply_pcb); +} |