1 /* Low level Alpha GNU/Linux interface, for GDB when running native. 2 Copyright (C) 2005-2014 Free Software Foundation, Inc. 3 4 This file is part of GDB. 5 6 This program is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 3 of the License, or 9 (at your option) any later version. 10 11 This program is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 18 19 #include "defs.h" 20 #include "target.h" 21 #include "regcache.h" 22 #include "linux-nat.h" 23 24 #include "alpha-tdep.h" 25 26 #include <sys/ptrace.h> 27 #include <alpha/ptrace.h> 28 29 #include <sys/procfs.h> 30 #include "gregset.h" 31 32 /* The address of UNIQUE for ptrace. */ 33 #define ALPHA_UNIQUE_PTRACE_ADDR 65 34 35 36 /* See the comment in m68k-tdep.c regarding the utility of these 37 functions. */ 38 39 void 40 supply_gregset (struct regcache *regcache, const gdb_gregset_t *gregsetp) 41 { 42 const long *regp = (const long *)gregsetp; 43 44 /* PC is in slot 32, UNIQUE is in slot 33. */ 45 alpha_supply_int_regs (regcache, -1, regp, regp + 31, regp + 32); 46 } 47 48 void 49 fill_gregset (const struct regcache *regcache, 50 gdb_gregset_t *gregsetp, int regno) 51 { 52 long *regp = (long *)gregsetp; 53 54 /* PC is in slot 32, UNIQUE is in slot 33. */ 55 alpha_fill_int_regs (regcache, regno, regp, regp + 31, regp + 32); 56 } 57 58 /* Now we do the same thing for floating-point registers. 59 Again, see the comments in m68k-tdep.c. */ 60 61 void 62 supply_fpregset (struct regcache *regcache, const gdb_fpregset_t *fpregsetp) 63 { 64 const long *regp = (const long *)fpregsetp; 65 66 /* FPCR is in slot 32. */ 67 alpha_supply_fp_regs (regcache, -1, regp, regp + 31); 68 } 69 70 void 71 fill_fpregset (const struct regcache *regcache, 72 gdb_fpregset_t *fpregsetp, int regno) 73 { 74 long *regp = (long *)fpregsetp; 75 76 /* FPCR is in slot 32. */ 77 alpha_fill_fp_regs (regcache, regno, regp, regp + 31); 78 } 79 80 81 static CORE_ADDR 82 alpha_linux_register_u_offset (struct gdbarch *gdbarch, int regno, int store_p) 83 { 84 if (regno == gdbarch_pc_regnum (gdbarch)) 85 return PC; 86 if (regno == ALPHA_UNIQUE_REGNUM) 87 return ALPHA_UNIQUE_PTRACE_ADDR; 88 if (regno < gdbarch_fp0_regnum (gdbarch)) 89 return GPR_BASE + regno; 90 else 91 return FPR_BASE + regno - gdbarch_fp0_regnum (gdbarch); 92 } 93 94 void _initialialize_alpha_linux_nat (void); 95 96 void 97 _initialize_alpha_linux_nat (void) 98 { 99 linux_nat_add_target (linux_trad_target (alpha_linux_register_u_offset)); 100 } 101