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Diffstat (limited to 'gdb/sparc64nbsd-nat.c')
| -rw-r--r-- | gdb/sparc64nbsd-nat.c | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/gdb/sparc64nbsd-nat.c b/gdb/sparc64nbsd-nat.c new file mode 100644 index 0000000..a991d0e --- /dev/null +++ b/gdb/sparc64nbsd-nat.c @@ -0,0 +1,207 @@ +/* Native-dependent code for UltraSPARC systems running NetBSD. + Copyright 2002 Free Software Foundation, Inc. + Contributed by Wasabi Systems, 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 + (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, write to the Free Software + Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include "defs.h" +#include "inferior.h" +#include "regcache.h" + +#include "sparcnbsd-tdep.h" + +#include <sys/types.h> +#include <sys/ptrace.h> +#include <machine/reg.h> + +/* NOTE: We don't bother with any of the deferred_store nonsense; it + makes things a lot more complicated than they need to be. */ + +/* Determine if PT_GETREGS fetches this register. */ +static int +getregs_supplies (int regno) +{ + /* 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)); +} + +/* Determine if PT_GETFPREGS fetches this register. */ +static int +getfpregs_supplies (int regno) +{ + return ((regno >= FP0_REGNUM && regno <= (FP0_REGNUM + 47)) + || regno == FPS_REGNUM); +} + +void +fetch_inferior_registers (int regno) +{ + /* 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; + } +} + +void +store_inferior_registers (int regno) +{ + /* 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; + } +} |