212 lines
6.1 KiB
C
212 lines
6.1 KiB
C
/* Low level Alpha interface, for GDB when running native.
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Copyright (C) 1993-2013 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "gdb_string.h"
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#include "inferior.h"
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#include "gdbcore.h"
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#include "target.h"
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#include "procfs.h"
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#include "regcache.h"
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#include "alpha-tdep.h"
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#include <sys/ptrace.h>
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#include <alpha/coreregs.h>
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#include <sys/user.h>
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/* Extract the register values out of the core file and store
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them into REGCACHE.
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CORE_REG_SECT points to the register values themselves, read into memory.
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CORE_REG_SIZE is the size of that area.
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WHICH says which set of registers we are handling (0 = int, 2 = float
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on machines where they are discontiguous).
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REG_ADDR is the offset from u.u_ar0 to the register values relative to
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core_reg_sect. This is used with old-fashioned core files to
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locate the registers in a large upage-plus-stack ".reg" section.
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Original upage address X is at location core_reg_sect+x+reg_addr. */
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static void
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fetch_osf_core_registers (struct regcache *regcache,
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char *core_reg_sect, unsigned core_reg_size,
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int which, CORE_ADDR reg_addr)
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{
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struct gdbarch *gdbarch = get_regcache_arch (regcache);
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int regno;
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int addr;
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int bad_reg = -1;
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/* Table to map a gdb regnum to an index in the core register
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section. The floating point register values are garbage in
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OSF/1.2 core files. OSF5 uses different names for the register
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enum list, need to handle two cases. The actual values are the
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same. */
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static int const core_reg_mapping[ALPHA_NUM_REGS] =
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{
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#ifdef NCF_REGS
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#define EFL NCF_REGS
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CF_V0, CF_T0, CF_T1, CF_T2, CF_T3, CF_T4, CF_T5, CF_T6,
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CF_T7, CF_S0, CF_S1, CF_S2, CF_S3, CF_S4, CF_S5, CF_S6,
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CF_A0, CF_A1, CF_A2, CF_A3, CF_A4, CF_A5, CF_T8, CF_T9,
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CF_T10, CF_T11, CF_RA, CF_T12, CF_AT, CF_GP, CF_SP, -1,
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EFL + 0, EFL + 1, EFL + 2, EFL + 3,
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EFL + 4, EFL + 5, EFL + 6, EFL + 7,
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EFL + 8, EFL + 9, EFL + 10, EFL + 11,
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EFL + 12, EFL + 13, EFL + 14, EFL + 15,
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EFL + 16, EFL + 17, EFL + 18, EFL + 19,
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EFL + 20, EFL + 21, EFL + 22, EFL + 23,
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EFL + 24, EFL + 25, EFL + 26, EFL + 27,
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EFL + 28, EFL + 29, EFL + 30, EFL + 31,
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CF_PC, -1, -1
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#else
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#define EFL (EF_SIZE / 8)
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EF_V0, EF_T0, EF_T1, EF_T2, EF_T3, EF_T4, EF_T5, EF_T6,
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EF_T7, EF_S0, EF_S1, EF_S2, EF_S3, EF_S4, EF_S5, EF_S6,
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EF_A0, EF_A1, EF_A2, EF_A3, EF_A4, EF_A5, EF_T8, EF_T9,
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EF_T10, EF_T11, EF_RA, EF_T12, EF_AT, EF_GP, EF_SP, -1,
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EFL + 0, EFL + 1, EFL + 2, EFL + 3,
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EFL + 4, EFL + 5, EFL + 6, EFL + 7,
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EFL + 8, EFL + 9, EFL + 10, EFL + 11,
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EFL + 12, EFL + 13, EFL + 14, EFL + 15,
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EFL + 16, EFL + 17, EFL + 18, EFL + 19,
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EFL + 20, EFL + 21, EFL + 22, EFL + 23,
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EFL + 24, EFL + 25, EFL + 26, EFL + 27,
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EFL + 28, EFL + 29, EFL + 30, EFL + 31,
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EF_PC, -1, -1
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#endif
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};
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for (regno = 0; regno < ALPHA_NUM_REGS; regno++)
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{
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if (gdbarch_cannot_fetch_register (gdbarch, regno))
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{
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regcache_raw_supply (regcache, regno, NULL);
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continue;
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}
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if (regno == ALPHA_ZERO_REGNUM)
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{
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const gdb_byte zero[8] = { 0 };
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regcache_raw_supply (regcache, regno, zero);
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continue;
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}
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addr = 8 * core_reg_mapping[regno];
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if (addr < 0 || addr >= core_reg_size)
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{
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/* ??? UNIQUE is a new addition. Don't generate an error. */
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if (regno == ALPHA_UNIQUE_REGNUM)
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{
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regcache_raw_supply (regcache, regno, NULL);
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continue;
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}
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if (bad_reg < 0)
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bad_reg = regno;
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}
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else
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{
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regcache_raw_supply (regcache, regno, core_reg_sect + addr);
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}
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}
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if (bad_reg >= 0)
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{
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error (_("Register %s not found in core file."),
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gdbarch_register_name (gdbarch, bad_reg));
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}
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}
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#include <sys/procfs.h>
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/* Prototypes for supply_gregset etc. */
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#include "gregset.h"
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/* See the comment in m68k-tdep.c regarding the utility of these
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functions. */
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void
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supply_gregset (struct regcache *regcache, const gdb_gregset_t *gregsetp)
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{
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const long *regp = gregsetp->regs;
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/* PC is in slot 32. */
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alpha_supply_int_regs (regcache, -1, regp, regp + 31, NULL);
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}
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void
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fill_gregset (const struct regcache *regcache,
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gdb_gregset_t *gregsetp, int regno)
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{
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long *regp = gregsetp->regs;
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/* PC is in slot 32. */
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alpha_fill_int_regs (regcache, regno, regp, regp + 31, NULL);
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}
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/* Now we do the same thing for floating-point registers.
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Again, see the comments in m68k-tdep.c. */
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void
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supply_fpregset (struct regcache *regcache, const gdb_fpregset_t *fpregsetp)
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{
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const long *regp = fpregsetp->regs;
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/* FPCR is in slot 32. */
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alpha_supply_fp_regs (regcache, -1, regp, regp + 31);
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}
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void
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fill_fpregset (const struct regcache *regcache,
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gdb_fpregset_t *fpregsetp, int regno)
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{
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long *regp = fpregsetp->regs;
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/* FPCR is in slot 32. */
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alpha_fill_fp_regs (regcache, regno, regp, regp + 31);
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}
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/* Register that we are able to handle alpha core file formats. */
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static struct core_fns alpha_osf_core_fns =
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{
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/* This really is bfd_target_unknown_flavour. */
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bfd_target_unknown_flavour, /* core_flavour */
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default_check_format, /* check_format */
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default_core_sniffer, /* core_sniffer */
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fetch_osf_core_registers, /* core_read_registers */
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NULL /* next */
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};
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/* Provide a prototype to silence -Wmissing-prototypes. */
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extern initialize_file_ftype _initialize_alpha_nat;
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void
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_initialize_alpha_nat (void)
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{
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struct target_ops *t;
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t = procfs_target ();
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add_target (t);
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deprecated_add_core_fns (&alpha_osf_core_fns);
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}
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