X-Git-Url: https://repo.jachan.dev/binutils.git/blobdiff_plain/2ee563b53258d390d7446e90a67f465d504ae44c..c1d8560ea5721191e30e2fcad720345730918497:/gdb/sparc64nbsd-nat.c diff --git a/gdb/sparc64nbsd-nat.c b/gdb/sparc64nbsd-nat.c index a991d0ef2a..c2738f0bf3 100644 --- a/gdb/sparc64nbsd-nat.c +++ b/gdb/sparc64nbsd-nat.c @@ -1,12 +1,12 @@ -/* Native-dependent code for UltraSPARC systems running NetBSD. - Copyright 2002 Free Software Foundation, Inc. - Contributed by Wasabi Systems, Inc. +/* Native-dependent code for NetBSD/sparc64. + + Copyright (C) 2003-2015 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 + 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, @@ -15,193 +15,175 @@ 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. */ + along with this program. If not, see . */ #include "defs.h" -#include "inferior.h" +#include "gdbcore.h" #include "regcache.h" +#include "target.h" -#include "sparcnbsd-tdep.h" +#include "sparc64-tdep.h" +#include "sparc-nat.h" -#include -#include -#include +/* 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); +} -/* NOTE: We don't bother with any of the deferred_store nonsense; it - makes things a lot more complicated than they need to be. */ +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. */ -/* Determine if PT_GETREGS fetches this register. */ static int -getregs_supplies (int regno) +sparc64nbsd_gregset_supplies_p (struct gdbarch *gdbarch, int regnum) { - /* FIXME: PS_REGNUM for 32-bit code. */ - return (regno == TSTATE_REGNUM - || regno == PC_REGNUM - || regno == NPC_REGNUM - || regno == Y_REGNUM - || (regno >= G0_REGNUM && regno <= G7_REGNUM) - || (regno >= O0_REGNUM && regno <= O7_REGNUM) - /* stack regs (handled by sparcnbsd_supply_reg) */ - || (regno >= L0_REGNUM && regno <= I7_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 if PT_GETFPREGS fetches this register. */ +/* Determine whether `fpregset_t' contains register REGNUM. */ + static int -getfpregs_supplies (int regno) +sparc64nbsd_fpregset_supplies_p (struct gdbarch *gdbarch, int regnum) { - return ((regno >= FP0_REGNUM && regno <= (FP0_REGNUM + 47)) - || regno == FPS_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; } + -void -fetch_inferior_registers (int regno) +/* Support for debugging kernel virtual memory images. */ + +#include +#include + +#include "bsd-kvm.h" + +static int +sparc64nbsd_supply_pcb (struct regcache *regcache, struct pcb *pcb) { - /* We don't use deferred stores. */ - if (deferred_stores) - internal_error (__FILE__, __LINE__, - "fetch_inferior_registers: deferred stores pending"); - - if (regno == -1 || getregs_supplies (regno)) - { - union { - struct reg32 regs32; - struct reg64 regs64; - } regs; - - if (ptrace (PT_GETREGS, PIDGET (inferior_ptid), - (PTRACE_ARG3_TYPE) ®s, 0) == -1) - perror_with_name ("Couldn't get registers"); - - if (gdbarch_ptr_bit (current_gdbarch) == 32) - sparcnbsd_supply_reg32 ((char *) ®s.regs32, regno); - else - sparcnbsd_supply_reg64 ((char *) ®s.regs64, regno); - if (regno != -1) - return; - } - - if (regno == -1 || getfpregs_supplies (regno)) - { - union { - struct fpreg32 fpregs32; - struct fpreg64 fpregs64; - } fpregs; - - if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid), - (PTRACE_ARG3_TYPE) &fpregs, 0) == -1) - perror_with_name ("Couldn't get floating point registers"); - - if (gdbarch_ptr_bit (current_gdbarch) == 32) - sparcnbsd_supply_fpreg32 ((char *) &fpregs.fpregs32, regno); - else - sparcnbsd_supply_fpreg64 ((char *) &fpregs.fpregs64, regno); - if (regno != -1) - return; - } + 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 -store_inferior_registers (int regno) +_initialize_sparc64nbsd_nat (void) { - /* We don't use deferred stores. */ - if (deferred_stores) - internal_error (__FILE__, __LINE__, - "store_inferior_registers: deferred stores pending"); - - if (regno == -1 || getregs_supplies (regno)) - { - union { - struct reg32 regs32; - struct reg64 regs64; - } regs; - - if (ptrace (PT_GETREGS, PIDGET (inferior_ptid), - (PTRACE_ARG3_TYPE) ®s, 0) == -1) - perror_with_name ("Couldn't get registers"); - - if (gdbarch_ptr_bit (current_gdbarch) == 32) - sparcnbsd_fill_reg32 ((char *) ®s.regs32, regno); - else - sparcnbsd_fill_reg64 ((char *) ®s.regs64, regno); - - if (ptrace (PT_SETREGS, PIDGET (inferior_ptid), - (PTRACE_ARG3_TYPE) ®s, 0) == -1) - perror_with_name ("Couldn't write registers"); - - /* Deal with the stack regs. */ - if (regno == -1 || regno == SP_REGNUM - || (regno >= L0_REGNUM && regno <= I7_REGNUM)) - { - CORE_ADDR sp = read_register (SP_REGNUM); - int i; - char buf[8]; - - if (sp & 1) - { - /* Registers are 64-bit. */ - sp += 2047; - - for (i = L0_REGNUM; i <= I7_REGNUM; i++) - { - if (regno == -1 || regno == SP_REGNUM || regno == i) - { - regcache_collect (i, buf); - target_write_memory (sp + ((i - L0_REGNUM) * 8), - buf, sizeof (buf)); - } - } - } - else - { - /* Registers are 32-bit. Toss any sign-extension of the stack - pointer. - - FIXME: We don't currently handle 32-bit code in a binary - that indicated LP64. Do we have to care about that? */ - if (gdbarch_ptr_bit (current_gdbarch) != 32) - internal_error - (__FILE__, __LINE__, - "store_inferior_registers: 32-bit code in 64-bit inferior"); - - sp &= 0xffffffffUL; - for (i = L0_REGNUM; i <= I7_REGNUM; i++) - { - if (regno == -1 || regno == SP_REGNUM || regno == i) - { - regcache_collect (i, buf); - target_write_memory (sp + ((i - L0_REGNUM) * 4), buf, 4); - } - } - } - } - - if (regno != -1) - return; - } - - if (regno == -1 || getfpregs_supplies (regno)) - { - union { - struct fpreg32 fpregs32; - struct fpreg64 fpregs64; - } fpregs; - - if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid), - (PTRACE_ARG3_TYPE) &fpregs, 0) == -1) - perror_with_name ("Couldn't get floating point registers"); - - if (gdbarch_ptr_bit (current_gdbarch) == 32) - sparcnbsd_fill_fpreg32 ((char *) &fpregs.fpregs32, regno); - else - sparcnbsd_fill_fpreg64 ((char *) &fpregs.fpregs64, regno); - - if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid), - (PTRACE_ARG3_TYPE) &fpregs, 0) == -1) - perror_with_name ("Couldn't write floating point registers"); - - if (regno != -1) - return; - } + 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); }