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Current File : //usr/src/contrib/gdb/gdb/armnbsd-nat.c |
/* Native-dependent code for BSD Unix running on ARM's, for GDB. Copyright 1988, 1989, 1991, 1992, 1994, 1996, 1999, 2002 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 (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" #ifndef FETCH_INFERIOR_REGISTERS #error Not FETCH_INFERIOR_REGISTERS #endif /* !FETCH_INFERIOR_REGISTERS */ #include "arm-tdep.h" #include <sys/types.h> #include <sys/ptrace.h> #include <machine/reg.h> #include <machine/frame.h> #include "inferior.h" #include "regcache.h" #include "gdbcore.h" extern int arm_apcs_32; static void supply_gregset (struct reg *gregset) { int regno; CORE_ADDR r_pc; /* Integer registers. */ for (regno = ARM_A1_REGNUM; regno < ARM_SP_REGNUM; regno++) supply_register (regno, (char *) &gregset->r[regno]); supply_register (ARM_SP_REGNUM, (char *) &gregset->r_sp); supply_register (ARM_LR_REGNUM, (char *) &gregset->r_lr); /* This is ok: we're running native... */ r_pc = ADDR_BITS_REMOVE (gregset->r_pc); supply_register (ARM_PC_REGNUM, (char *) &r_pc); if (arm_apcs_32) supply_register (ARM_PS_REGNUM, (char *) &gregset->r_cpsr); else supply_register (ARM_PS_REGNUM, (char *) &gregset->r_pc); } static void supply_fparegset (struct fpreg *fparegset) { int regno; for (regno = ARM_F0_REGNUM; regno <= ARM_F7_REGNUM; regno++) supply_register (regno, (char *) &fparegset->fpr[regno - ARM_F0_REGNUM]); supply_register (ARM_FPS_REGNUM, (char *) &fparegset->fpr_fpsr); } static void fetch_register (int regno) { struct reg inferior_registers; int ret; ret = ptrace (PT_GETREGS, PIDGET (inferior_ptid), (PTRACE_ARG3_TYPE) &inferior_registers, 0); if (ret < 0) { warning ("unable to fetch general register"); return; } switch (regno) { case ARM_SP_REGNUM: supply_register (ARM_SP_REGNUM, (char *) &inferior_registers.r_sp); break; case ARM_LR_REGNUM: supply_register (ARM_LR_REGNUM, (char *) &inferior_registers.r_lr); break; case ARM_PC_REGNUM: /* This is ok: we're running native... */ inferior_registers.r_pc = ADDR_BITS_REMOVE (inferior_registers.r_pc); supply_register (ARM_PC_REGNUM, (char *) &inferior_registers.r_pc); break; case ARM_PS_REGNUM: if (arm_apcs_32) supply_register (ARM_PS_REGNUM, (char *) &inferior_registers.r_cpsr); else supply_register (ARM_PS_REGNUM, (char *) &inferior_registers.r_pc); break; default: supply_register (regno, (char *) &inferior_registers.r[regno]); break; } } static void fetch_regs (void) { struct reg inferior_registers; int ret; int regno; ret = ptrace (PT_GETREGS, PIDGET (inferior_ptid), (PTRACE_ARG3_TYPE) &inferior_registers, 0); if (ret < 0) { warning ("unable to fetch general registers"); return; } supply_gregset (&inferior_registers); } static void fetch_fp_register (int regno) { struct fpreg inferior_fp_registers; int ret; ret = ptrace (PT_GETFPREGS, PIDGET (inferior_ptid), (PTRACE_ARG3_TYPE) &inferior_fp_registers, 0); if (ret < 0) { warning ("unable to fetch floating-point register"); return; } switch (regno) { case ARM_FPS_REGNUM: supply_register (ARM_FPS_REGNUM, (char *) &inferior_fp_registers.fpr_fpsr); break; default: supply_register (regno, (char *) &inferior_fp_registers.fpr[regno - ARM_F0_REGNUM]); break; } } static void fetch_fp_regs (void) { struct fpreg inferior_fp_registers; int ret; int regno; ret = ptrace (PT_GETFPREGS, PIDGET (inferior_ptid), (PTRACE_ARG3_TYPE) &inferior_fp_registers, 0); if (ret < 0) { warning ("unable to fetch general registers"); return; } supply_fparegset (&inferior_fp_registers); } void fetch_inferior_registers (int regno) { if (regno >= 0) { if (regno < ARM_F0_REGNUM || regno > ARM_FPS_REGNUM) fetch_register (regno); else fetch_fp_register (regno); } else { fetch_regs (); fetch_fp_regs (); } } static void store_register (int regno) { struct reg inferior_registers; int ret; ret = ptrace (PT_GETREGS, PIDGET (inferior_ptid), (PTRACE_ARG3_TYPE) &inferior_registers, 0); if (ret < 0) { warning ("unable to fetch general registers"); return; } switch (regno) { case ARM_SP_REGNUM: regcache_collect (ARM_SP_REGNUM, (char *) &inferior_registers.r_sp); break; case ARM_LR_REGNUM: regcache_collect (ARM_LR_REGNUM, (char *) &inferior_registers.r_lr); break; case ARM_PC_REGNUM: if (arm_apcs_32) regcache_collect (ARM_PC_REGNUM, (char *) &inferior_registers.r_pc); else { unsigned pc_val; regcache_collect (ARM_PC_REGNUM, (char *) &pc_val); pc_val = ADDR_BITS_REMOVE (pc_val); inferior_registers.r_pc ^= ADDR_BITS_REMOVE (inferior_registers.r_pc); inferior_registers.r_pc |= pc_val; } break; case ARM_PS_REGNUM: if (arm_apcs_32) regcache_collect (ARM_PS_REGNUM, (char *) &inferior_registers.r_cpsr); else { unsigned psr_val; regcache_collect (ARM_PS_REGNUM, (char *) &psr_val); psr_val ^= ADDR_BITS_REMOVE (psr_val); inferior_registers.r_pc = ADDR_BITS_REMOVE (inferior_registers.r_pc); inferior_registers.r_pc |= psr_val; } break; default: regcache_collect (regno, (char *) &inferior_registers.r[regno]); break; } ret = ptrace (PT_SETREGS, PIDGET (inferior_ptid), (PTRACE_ARG3_TYPE) &inferior_registers, 0); if (ret < 0) warning ("unable to write register %d to inferior", regno); } static void store_regs (void) { struct reg inferior_registers; int ret; int regno; for (regno = ARM_A1_REGNUM; regno < ARM_SP_REGNUM; regno++) regcache_collect (regno, (char *) &inferior_registers.r[regno]); regcache_collect (ARM_SP_REGNUM, (char *) &inferior_registers.r_sp); regcache_collect (ARM_LR_REGNUM, (char *) &inferior_registers.r_lr); if (arm_apcs_32) { regcache_collect (ARM_PC_REGNUM, (char *) &inferior_registers.r_pc); regcache_collect (ARM_PS_REGNUM, (char *) &inferior_registers.r_cpsr); } else { unsigned pc_val; unsigned psr_val; regcache_collect (ARM_PC_REGNUM, (char *) &pc_val); regcache_collect (ARM_PS_REGNUM, (char *) &psr_val); pc_val = ADDR_BITS_REMOVE (pc_val); psr_val ^= ADDR_BITS_REMOVE (psr_val); inferior_registers.r_pc = pc_val | psr_val; } ret = ptrace (PT_SETREGS, PIDGET (inferior_ptid), (PTRACE_ARG3_TYPE) &inferior_registers, 0); if (ret < 0) warning ("unable to store general registers"); } static void store_fp_register (int regno) { struct fpreg inferior_fp_registers; int ret; ret = ptrace (PT_GETFPREGS, PIDGET (inferior_ptid), (PTRACE_ARG3_TYPE) &inferior_fp_registers, 0); if (ret < 0) { warning ("unable to fetch floating-point registers"); return; } switch (regno) { case ARM_FPS_REGNUM: regcache_collect (ARM_FPS_REGNUM, (char *) &inferior_fp_registers.fpr_fpsr); break; default: regcache_collect (regno, (char *) &inferior_fp_registers.fpr[regno - ARM_F0_REGNUM]); break; } ret = ptrace (PT_SETFPREGS, PIDGET (inferior_ptid), (PTRACE_ARG3_TYPE) &inferior_fp_registers, 0); if (ret < 0) warning ("unable to write register %d to inferior", regno); } static void store_fp_regs (void) { struct fpreg inferior_fp_registers; int ret; int regno; for (regno = ARM_F0_REGNUM; regno <= ARM_F7_REGNUM; regno++) regcache_collect (regno, (char *) &inferior_fp_registers.fpr[regno - ARM_F0_REGNUM]); regcache_collect (ARM_FPS_REGNUM, (char *) &inferior_fp_registers.fpr_fpsr); ret = ptrace (PT_SETFPREGS, PIDGET (inferior_ptid), (PTRACE_ARG3_TYPE) &inferior_fp_registers, 0); if (ret < 0) warning ("unable to store floating-point registers"); } void store_inferior_registers (int regno) { if (regno >= 0) { if (regno < ARM_F0_REGNUM || regno > ARM_FPS_REGNUM) store_register (regno); else store_fp_register (regno); } else { store_regs (); store_fp_regs (); } } struct md_core { struct reg intreg; struct fpreg freg; }; static void fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, int which, CORE_ADDR ignore) { struct md_core *core_reg = (struct md_core *) core_reg_sect; int regno; CORE_ADDR r_pc; supply_gregset (&core_reg->intreg); supply_fparegset (&core_reg->freg); } static void fetch_elfcore_registers (char *core_reg_sect, unsigned core_reg_size, int which, CORE_ADDR ignore) { struct reg gregset; struct fpreg fparegset; switch (which) { case 0: /* Integer registers. */ if (core_reg_size != sizeof (struct reg)) warning ("wrong size of register set in core file"); else { /* The memcpy may be unnecessary, but we can't really be sure of the alignment of the data in the core file. */ memcpy (&gregset, core_reg_sect, sizeof (gregset)); supply_gregset (&gregset); } break; case 2: if (core_reg_size != sizeof (struct fpreg)) warning ("wrong size of FPA register set in core file"); else { /* The memcpy may be unnecessary, but we can't really be sure of the alignment of the data in the core file. */ memcpy (&fparegset, core_reg_sect, sizeof (fparegset)); supply_fparegset (&fparegset); } break; default: /* Don't know what kind of register request this is; just ignore it. */ break; } } static struct core_fns arm_netbsd_core_fns = { bfd_target_unknown_flavour, /* core_flovour. */ default_check_format, /* check_format. */ default_core_sniffer, /* core_sniffer. */ fetch_core_registers, /* core_read_registers. */ NULL }; static struct core_fns arm_netbsd_elfcore_fns = { bfd_target_elf_flavour, /* core_flovour. */ default_check_format, /* check_format. */ default_core_sniffer, /* core_sniffer. */ fetch_elfcore_registers, /* core_read_registers. */ NULL }; void _initialize_arm_netbsd_nat (void) { add_core_fns (&arm_netbsd_core_fns); add_core_fns (&arm_netbsd_elfcore_fns); }