1 /* Low level Alpha interface, for GDB when running native.
2 Copyright 1993, 1995, 1996, 1998, 1999, 2000, 2001, 2003
3 Free Software Foundation, Inc.
5 This file is part of GDB.
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 2 of the License, or
10 (at your option) any later version.
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.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
23 #include "gdb_string.h"
29 #include "alpha-tdep.h"
31 #include <sys/ptrace.h>
34 #include <alpha/ptrace.h>
36 #include <alpha/coreregs.h>
40 /* Prototypes for local functions. */
42 static void fetch_osf_core_registers (char *, unsigned, int, CORE_ADDR);
43 static void fetch_elf_core_registers (char *, unsigned, int, CORE_ADDR);
45 /* Extract the register values out of the core file and store
46 them where `read_register' will find them.
48 CORE_REG_SECT points to the register values themselves, read into memory.
49 CORE_REG_SIZE is the size of that area.
50 WHICH says which set of registers we are handling (0 = int, 2 = float
51 on machines where they are discontiguous).
52 REG_ADDR is the offset from u.u_ar0 to the register values relative to
53 core_reg_sect. This is used with old-fashioned core files to
54 locate the registers in a large upage-plus-stack ".reg" section.
55 Original upage address X is at location core_reg_sect+x+reg_addr.
59 fetch_osf_core_registers (char *core_reg_sect, unsigned core_reg_size,
60 int which, CORE_ADDR reg_addr)
66 /* Table to map a gdb regnum to an index in the core register
67 section. The floating point register values are garbage in
68 OSF/1.2 core files. OSF5 uses different names for the register
69 enum list, need to handle two cases. The actual values are the
71 static int const core_reg_mapping[ALPHA_NUM_REGS] =
75 CF_V0, CF_T0, CF_T1, CF_T2, CF_T3, CF_T4, CF_T5, CF_T6,
76 CF_T7, CF_S0, CF_S1, CF_S2, CF_S3, CF_S4, CF_S5, CF_S6,
77 CF_A0, CF_A1, CF_A2, CF_A3, CF_A4, CF_A5, CF_T8, CF_T9,
78 CF_T10, CF_T11, CF_RA, CF_T12, CF_AT, CF_GP, CF_SP, -1,
79 EFL + 0, EFL + 1, EFL + 2, EFL + 3, EFL + 4, EFL + 5, EFL + 6, EFL + 7,
80 EFL + 8, EFL + 9, EFL + 10, EFL + 11, EFL + 12, EFL + 13, EFL + 14, EFL + 15,
81 EFL + 16, EFL + 17, EFL + 18, EFL + 19, EFL + 20, EFL + 21, EFL + 22, EFL + 23,
82 EFL + 24, EFL + 25, EFL + 26, EFL + 27, EFL + 28, EFL + 29, EFL + 30, EFL + 31,
85 #define EFL (EF_SIZE / 8)
86 EF_V0, EF_T0, EF_T1, EF_T2, EF_T3, EF_T4, EF_T5, EF_T6,
87 EF_T7, EF_S0, EF_S1, EF_S2, EF_S3, EF_S4, EF_S5, EF_S6,
88 EF_A0, EF_A1, EF_A2, EF_A3, EF_A4, EF_A5, EF_T8, EF_T9,
89 EF_T10, EF_T11, EF_RA, EF_T12, EF_AT, EF_GP, EF_SP, -1,
90 EFL + 0, EFL + 1, EFL + 2, EFL + 3, EFL + 4, EFL + 5, EFL + 6, EFL + 7,
91 EFL + 8, EFL + 9, EFL + 10, EFL + 11, EFL + 12, EFL + 13, EFL + 14, EFL + 15,
92 EFL + 16, EFL + 17, EFL + 18, EFL + 19, EFL + 20, EFL + 21, EFL + 22, EFL + 23,
93 EFL + 24, EFL + 25, EFL + 26, EFL + 27, EFL + 28, EFL + 29, EFL + 30, EFL + 31,
98 for (regno = 0; regno < ALPHA_NUM_REGS; regno++)
100 if (CANNOT_FETCH_REGISTER (regno))
102 supply_register (regno, NULL);
105 addr = 8 * core_reg_mapping[regno];
106 if (addr < 0 || addr >= core_reg_size)
108 /* ??? UNIQUE is a new addition. Don't generate an error. */
109 if (regno == ALPHA_UNIQUE_REGNUM)
111 supply_register (regno, NULL);
119 supply_register (regno, core_reg_sect + addr);
124 error ("Register %s not found in core file.", REGISTER_NAME (bad_reg));
129 fetch_elf_core_registers (char *core_reg_sect, unsigned core_reg_size,
130 int which, CORE_ADDR reg_addr)
132 if (core_reg_size < 32 * 8)
134 error ("Core file register section too small (%u bytes).", core_reg_size);
140 case 0: /* integer registers */
141 /* PC is in slot 32; UNIQUE is in slot 33, if present. */
142 alpha_supply_int_regs (-1, core_reg_sect, core_reg_sect + 31*8,
143 (core_reg_size >= 33 * 8
144 ? core_reg_sect + 32*8 : NULL));
147 case 2: /* floating-point registers */
148 /* FPCR is in slot 32. */
149 alpha_supply_fp_regs (-1, core_reg_sect, core_reg_sect + 31*8);
158 /* Map gdb internal register number to a ptrace ``address''.
159 These ``addresses'' are defined in <sys/ptrace.h>, with
160 the exception of ALPHA_UNIQUE_PTRACE_ADDR. */
162 #ifndef ALPHA_UNIQUE_PTRACE_ADDR
163 #define ALPHA_UNIQUE_PTRACE_ADDR 0
167 register_addr (int regno, CORE_ADDR blockend)
169 if (regno == PC_REGNUM)
171 if (regno == ALPHA_UNIQUE_REGNUM)
172 return ALPHA_UNIQUE_PTRACE_ADDR;
173 if (regno < FP0_REGNUM)
174 return GPR_BASE + regno;
176 return FPR_BASE + regno - FP0_REGNUM;
182 return (sizeof (struct user));
185 #if defined(USE_PROC_FS) || defined(HAVE_GREGSET_T)
186 #include <sys/procfs.h>
188 /* Prototypes for supply_gregset etc. */
191 /* Locate the UNIQUE value within the gregset_t. */
192 #ifndef ALPHA_REGSET_UNIQUE
193 #define ALPHA_REGSET_UNIQUE(ptr) NULL
197 * See the comment in m68k-tdep.c regarding the utility of these functions.
201 supply_gregset (gdb_gregset_t *gregsetp)
203 long *regp = ALPHA_REGSET_BASE (gregsetp);
204 void *unique = ALPHA_REGSET_UNIQUE (gregsetp);
206 /* PC is in slot 32. */
207 alpha_supply_int_regs (-1, regp, regp + 31, unique);
211 fill_gregset (gdb_gregset_t *gregsetp, int regno)
213 long *regp = ALPHA_REGSET_BASE (gregsetp);
214 void *unique = ALPHA_REGSET_UNIQUE (gregsetp);
216 /* PC is in slot 32. */
217 alpha_fill_int_regs (regno, regp, regp + 31, unique);
221 * Now we do the same thing for floating-point registers.
222 * Again, see the comments in m68k-tdep.c.
226 supply_fpregset (gdb_fpregset_t *fpregsetp)
228 long *regp = ALPHA_REGSET_BASE (fpregsetp);
230 /* FPCR is in slot 32. */
231 alpha_supply_fp_regs (-1, regp, regp + 31);
235 fill_fpregset (gdb_fpregset_t *fpregsetp, int regno)
237 long *regp = ALPHA_REGSET_BASE (fpregsetp);
239 /* FPCR is in slot 32. */
240 alpha_fill_fp_regs (regno, regp, regp + 31);
245 /* Register that we are able to handle alpha core file formats. */
247 static struct core_fns alpha_osf_core_fns =
249 /* This really is bfd_target_unknown_flavour. */
251 bfd_target_unknown_flavour, /* core_flavour */
252 default_check_format, /* check_format */
253 default_core_sniffer, /* core_sniffer */
254 fetch_osf_core_registers, /* core_read_registers */
258 static struct core_fns alpha_elf_core_fns =
260 bfd_target_elf_flavour, /* core_flavour */
261 default_check_format, /* check_format */
262 default_core_sniffer, /* core_sniffer */
263 fetch_elf_core_registers, /* core_read_registers */
268 _initialize_core_alpha (void)
270 add_core_fns (&alpha_osf_core_fns);
271 add_core_fns (&alpha_elf_core_fns);