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