1/* Low level Alpha interface, for GDB when running native. 2 Copyright (C) 1993, 1995, 1996, 1998, 1999, 2000, 2001, 2003, 2007 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 "gdb_string.h" 22#include "inferior.h" 23#include "gdbcore.h" 24#include "target.h" 25#include "regcache.h" 26 27#include "alpha-tdep.h" 28 29#include <sys/ptrace.h> 30#include <alpha/coreregs.h> 31#include <sys/user.h> 32 33 34/* Extract the register values out of the core file and store 35 them into REGCACHE. 36 37 CORE_REG_SECT points to the register values themselves, read into memory. 38 CORE_REG_SIZE is the size of that area. 39 WHICH says which set of registers we are handling (0 = int, 2 = float 40 on machines where they are discontiguous). 41 REG_ADDR is the offset from u.u_ar0 to the register values relative to 42 core_reg_sect. This is used with old-fashioned core files to 43 locate the registers in a large upage-plus-stack ".reg" section. 44 Original upage address X is at location core_reg_sect+x+reg_addr. 45 */ 46 47static void 48fetch_osf_core_registers (struct regcache *regcache, 49 char *core_reg_sect, unsigned core_reg_size, 50 int which, CORE_ADDR reg_addr) 51{ 52 int regno; 53 int addr; 54 int bad_reg = -1; 55 56 /* Table to map a gdb regnum to an index in the core register 57 section. The floating point register values are garbage in 58 OSF/1.2 core files. OSF5 uses different names for the register 59 enum list, need to handle two cases. The actual values are the 60 same. */ 61 static int const core_reg_mapping[ALPHA_NUM_REGS] = 62 { 63#ifdef NCF_REGS 64#define EFL NCF_REGS 65 CF_V0, CF_T0, CF_T1, CF_T2, CF_T3, CF_T4, CF_T5, CF_T6, 66 CF_T7, CF_S0, CF_S1, CF_S2, CF_S3, CF_S4, CF_S5, CF_S6, 67 CF_A0, CF_A1, CF_A2, CF_A3, CF_A4, CF_A5, CF_T8, CF_T9, 68 CF_T10, CF_T11, CF_RA, CF_T12, CF_AT, CF_GP, CF_SP, -1, 69 EFL + 0, EFL + 1, EFL + 2, EFL + 3, EFL + 4, EFL + 5, EFL + 6, EFL + 7, 70 EFL + 8, EFL + 9, EFL + 10, EFL + 11, EFL + 12, EFL + 13, EFL + 14, EFL + 15, 71 EFL + 16, EFL + 17, EFL + 18, EFL + 19, EFL + 20, EFL + 21, EFL + 22, EFL + 23, 72 EFL + 24, EFL + 25, EFL + 26, EFL + 27, EFL + 28, EFL + 29, EFL + 30, EFL + 31, 73 CF_PC, -1, -1 74#else 75#define EFL (EF_SIZE / 8) 76 EF_V0, EF_T0, EF_T1, EF_T2, EF_T3, EF_T4, EF_T5, EF_T6, 77 EF_T7, EF_S0, EF_S1, EF_S2, EF_S3, EF_S4, EF_S5, EF_S6, 78 EF_A0, EF_A1, EF_A2, EF_A3, EF_A4, EF_A5, EF_T8, EF_T9, 79 EF_T10, EF_T11, EF_RA, EF_T12, EF_AT, EF_GP, EF_SP, -1, 80 EFL + 0, EFL + 1, EFL + 2, EFL + 3, EFL + 4, EFL + 5, EFL + 6, EFL + 7, 81 EFL + 8, EFL + 9, EFL + 10, EFL + 11, EFL + 12, EFL + 13, EFL + 14, EFL + 15, 82 EFL + 16, EFL + 17, EFL + 18, EFL + 19, EFL + 20, EFL + 21, EFL + 22, EFL + 23, 83 EFL + 24, EFL + 25, EFL + 26, EFL + 27, EFL + 28, EFL + 29, EFL + 30, EFL + 31, 84 EF_PC, -1, -1 85#endif 86 }; 87 88 for (regno = 0; regno < ALPHA_NUM_REGS; regno++) 89 { 90 if (gdbarch_cannot_fetch_register (current_gdbarch, regno)) 91 { 92 regcache_raw_supply (regcache, regno, NULL); 93 continue; 94 } 95 addr = 8 * core_reg_mapping[regno]; 96 if (addr < 0 || addr >= core_reg_size) 97 { 98 /* ??? UNIQUE is a new addition. Don't generate an error. */ 99 if (regno == ALPHA_UNIQUE_REGNUM) 100 { 101 regcache_raw_supply (regcache, regno, NULL); 102 continue; 103 } 104 if (bad_reg < 0) 105 bad_reg = regno; 106 } 107 else 108 { 109 regcache_raw_supply (regcache, regno, core_reg_sect + addr); 110 } 111 } 112 if (bad_reg >= 0) 113 { 114 error (_("Register %s not found in core file."), 115 gdbarch_register_name (current_gdbarch, bad_reg)); 116 } 117} 118 119 120#include <sys/procfs.h> 121/* Prototypes for supply_gregset etc. */ 122#include "gregset.h" 123 124/* 125 * See the comment in m68k-tdep.c regarding the utility of these functions. 126 */ 127 128void 129supply_gregset (struct regcache *regcache, const gdb_gregset_t *gregsetp) 130{ 131 const long *regp = gregsetp->regs; 132 133 /* PC is in slot 32. */ 134 alpha_supply_int_regs (regcache, -1, regp, regp + 31, NULL); 135} 136 137void 138fill_gregset (const struct regcache *regcache, 139 gdb_gregset_t *gregsetp, int regno) 140{ 141 long *regp = gregsetp->regs; 142 143 /* PC is in slot 32. */ 144 alpha_fill_int_regs (regcache, regno, regp, regp + 31, NULL); 145} 146 147/* 148 * Now we do the same thing for floating-point registers. 149 * Again, see the comments in m68k-tdep.c. 150 */ 151 152void 153supply_fpregset (struct regcache *regcache, const gdb_fpregset_t *fpregsetp) 154{ 155 const long *regp = fpregsetp->regs; 156 157 /* FPCR is in slot 32. */ 158 alpha_supply_fp_regs (regcache, -1, regp, regp + 31); 159} 160 161void 162fill_fpregset (const struct regcache *regcache, 163 gdb_fpregset_t *fpregsetp, int regno) 164{ 165 long *regp = fpregsetp->regs; 166 167 /* FPCR is in slot 32. */ 168 alpha_fill_fp_regs (regcache, regno, regp, regp + 31); 169} 170 171 172/* Register that we are able to handle alpha core file formats. */ 173 174static struct core_fns alpha_osf_core_fns = 175{ 176 /* This really is bfd_target_unknown_flavour. */ 177 178 bfd_target_unknown_flavour, /* core_flavour */ 179 default_check_format, /* check_format */ 180 default_core_sniffer, /* core_sniffer */ 181 fetch_osf_core_registers, /* core_read_registers */ 182 NULL /* next */ 183}; 184 185void 186_initialize_core_alpha (void) 187{ 188 deprecated_add_core_fns (&alpha_osf_core_fns); 189} 190