1 /* Low level Alpha GNU/Linux interface, for GDB when running native. 2 Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011 3 Free Software Foundation, Inc. 4 5 This file is part of GDB. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 19 20 #include "defs.h" 21 #include "target.h" 22 #include "regcache.h" 23 #include "linux-nat.h" 24 25 #include "alpha-tdep.h" 26 27 #include <sys/ptrace.h> 28 #include <alpha/ptrace.h> 29 30 #include <sys/procfs.h> 31 #include "gregset.h" 32 33 /* The address of UNIQUE for ptrace. */ 34 #define ALPHA_UNIQUE_PTRACE_ADDR 65 35 36 37 /* See the comment in m68k-tdep.c regarding the utility of these 38 functions. */ 39 40 void 41 supply_gregset (struct regcache *regcache, const gdb_gregset_t *gregsetp) 42 { 43 const long *regp = (const long *)gregsetp; 44 45 /* PC is in slot 32, UNIQUE is in slot 33. */ 46 alpha_supply_int_regs (regcache, -1, regp, regp + 31, regp + 32); 47 } 48 49 void 50 fill_gregset (const struct regcache *regcache, 51 gdb_gregset_t *gregsetp, int regno) 52 { 53 long *regp = (long *)gregsetp; 54 55 /* PC is in slot 32, UNIQUE is in slot 33. */ 56 alpha_fill_int_regs (regcache, regno, regp, regp + 31, regp + 32); 57 } 58 59 /* Now we do the same thing for floating-point registers. 60 Again, see the comments in m68k-tdep.c. */ 61 62 void 63 supply_fpregset (struct regcache *regcache, const gdb_fpregset_t *fpregsetp) 64 { 65 const long *regp = (const long *)fpregsetp; 66 67 /* FPCR is in slot 32. */ 68 alpha_supply_fp_regs (regcache, -1, regp, regp + 31); 69 } 70 71 void 72 fill_fpregset (const struct regcache *regcache, 73 gdb_fpregset_t *fpregsetp, int regno) 74 { 75 long *regp = (long *)fpregsetp; 76 77 /* FPCR is in slot 32. */ 78 alpha_fill_fp_regs (regcache, regno, regp, regp + 31); 79 } 80 81 82 static CORE_ADDR 83 alpha_linux_register_u_offset (struct gdbarch *gdbarch, int regno, int store_p) 84 { 85 if (regno == gdbarch_pc_regnum (gdbarch)) 86 return PC; 87 if (regno == ALPHA_UNIQUE_REGNUM) 88 return ALPHA_UNIQUE_PTRACE_ADDR; 89 if (regno < gdbarch_fp0_regnum (gdbarch)) 90 return GPR_BASE + regno; 91 else 92 return FPR_BASE + regno - gdbarch_fp0_regnum (gdbarch); 93 } 94 95 void _initialialize_alpha_linux_nat (void); 96 97 void 98 _initialize_alpha_linux_nat (void) 99 { 100 linux_nat_add_target (linux_trad_target (alpha_linux_register_u_offset)); 101 } 102