binutils-gdb/gdb/xtensa-linux-nat.c

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2008-02-11 Maxim Grigoriev <maxim2405@gmail.com> * NEWS (New native configurations): Xtensa GNU/Linux. (New targets): Xtensa GNU/Linux. * Makefile.in (ALL_TARGET_OBS): Add xtensa-linux-nat.o and xtensa-linux-tdep.o (ALLDEPFILES): Add xtensa-linux-tdep.c and xtensa-linux-nat.c (xtensa-linux-nat.o, xtensa-linux-tdep.o): New dependencies. * configure.tgt (xtensa*-*-linux*): New entry. * xtensa-config.c (xtensa_tdep): New variable. (xtensa_config_byte_order, xtensa_config_tdep): Removed. (rmap): Change format based on new macro XTREG. (XTENSA_CONFIG_INSTANTIATE): Use new macro defined in xtensa-tdep.h. * xtensa-linux-nat.c: New. * xtensa-linux-tdep.c: New. * xtensa-xtregs.c: New. * xtensa-tdep.h (xtensa_elf_gregset_t): Update. (XTENSA_ELF_NGREG, XTREG, XTREG_END, XTENSA_GDBARCH_TDEP_INSTANTIATE) (XCHAL_NUM_CONTEXTS, XCHAL_HAVE_EXCEPTIONS): New macros. (xtensa_register_t): New field coprocessor. (XTENSA_REGISTER_FLAGS_PRIVILEGED): Name spelling corrected. * xtensa-tdep.c (xtensa_config_tdep, xtensa_config_byte_order): Removed. (xtensa_pseudo_register_read, xtensa_pseudo_register_write): Update to handle privileged registers. (xtensa_supply_gregset) Remove exccause and excvaddr registers. (xtensa_push_dummy_call): Set windowstart register correctly. (call0_analyze_prologue): Initialize xtensa_default_isa. (xtensa_derive_tdep): New. (xtensa_gdbarch_init): Get rid of xtensa_config_byte_order and xtensa_config_tdep, use XCHAL_HAVE_BE and xtensa_tdep instead. Call xtensa_derive_tdep(). * config/xtensa/linux.mh: New. * regformats/reg-xtensa.dat: New.
2008-02-11 22:58:41 +01:00
/* Xtensa GNU/Linux native support.
Copyright (C) 2007, 2008 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 "frame.h"
#include "inferior.h"
#include "gdbcore.h"
#include "regcache.h"
#include "gdb_assert.h"
#include "target.h"
#include "linux-nat.h"
#include <stdint.h>
#include <sys/types.h>
#include <sys/param.h>
#include <signal.h>
#include <sys/user.h>
#include <sys/ioctl.h>
#include "gdb_wait.h"
#include <fcntl.h>
#include <sys/procfs.h>
#include <sys/ptrace.h>
#include "gregset.h"
#include "xtensa-tdep.h"
/* Extended register set depends on hardware configs.
Keeping these definitions separately allows to introduce
hardware-specific overlays. */
#include "xtensa-xtregs.c"
int
get_thread_id (ptid_t ptid)
{
int tid = TIDGET (ptid);
if (0 == tid)
tid = PIDGET (ptid);
return tid;
}
#define GET_THREAD_ID(PTID) get_thread_id (PTID)
void
fill_gregset (const struct regcache *regcache,
gdb_gregset_t *gregsetp, int regnum)
{
int i;
xtensa_elf_gregset_t *regs = (xtensa_elf_gregset_t *) gregsetp;
struct gdbarch *gdbarch = get_regcache_arch (regcache);
if (regnum == gdbarch_pc_regnum (gdbarch) || regnum == -1)
regcache_raw_collect (regcache, gdbarch_pc_regnum (gdbarch), &regs->pc);
if (regnum == gdbarch_ps_regnum (gdbarch) || regnum == -1)
regcache_raw_collect (regcache, gdbarch_ps_regnum (gdbarch), &regs->ps);
if (regnum == gdbarch_tdep (gdbarch)->wb_regnum || regnum == -1)
regcache_raw_collect (regcache,
gdbarch_tdep (gdbarch)->wb_regnum,
&regs->windowbase);
if (regnum == gdbarch_tdep (gdbarch)->ws_regnum || regnum == -1)
regcache_raw_collect (regcache,
gdbarch_tdep (gdbarch)->ws_regnum,
&regs->windowstart);
if (regnum == gdbarch_tdep (gdbarch)->lbeg_regnum || regnum == -1)
regcache_raw_collect (regcache,
gdbarch_tdep (gdbarch)->lbeg_regnum,
&regs->lbeg);
if (regnum == gdbarch_tdep (gdbarch)->lend_regnum || regnum == -1)
regcache_raw_collect (regcache,
gdbarch_tdep (gdbarch)->lend_regnum,
&regs->lend);
if (regnum == gdbarch_tdep (gdbarch)->lcount_regnum || regnum == -1)
regcache_raw_collect (regcache,
gdbarch_tdep (gdbarch)->lcount_regnum,
&regs->lcount);
if (regnum == gdbarch_tdep (gdbarch)->sar_regnum || regnum == -1)
regcache_raw_collect (regcache,
gdbarch_tdep (gdbarch)->sar_regnum,
&regs->sar);
if (regnum >=gdbarch_tdep (gdbarch)->ar_base
&& regnum < gdbarch_tdep (gdbarch)->ar_base
+ gdbarch_tdep (gdbarch)->num_aregs)
regcache_raw_collect (regcache,regnum,
&regs->ar[regnum - gdbarch_tdep (gdbarch)->ar_base]);
else if (regnum == -1)
{
for (i = 0; i < gdbarch_tdep (gdbarch)->num_aregs; ++i)
regcache_raw_collect (regcache,
gdbarch_tdep (gdbarch)->ar_base + i,
&regs->ar[i]);
}
}
void
supply_gregset_reg (struct regcache *regcache,
const gdb_gregset_t *gregsetp, int regnum)
{
int i;
xtensa_elf_gregset_t *regs = (xtensa_elf_gregset_t *) gregsetp;
struct gdbarch *gdbarch = get_regcache_arch (regcache);
if (regnum == gdbarch_pc_regnum (gdbarch) || regnum == -1)
regcache_raw_supply (regcache, gdbarch_pc_regnum (gdbarch), &regs->pc);
if (regnum == gdbarch_ps_regnum (gdbarch) || regnum == -1)
regcache_raw_supply (regcache, gdbarch_ps_regnum (gdbarch), &regs->ps);
if (regnum == gdbarch_tdep (gdbarch)->wb_regnum || regnum == -1)
regcache_raw_supply (regcache,
gdbarch_tdep (gdbarch)->wb_regnum,
&regs->windowbase);
if (regnum == gdbarch_tdep (gdbarch)->ws_regnum || regnum == -1)
regcache_raw_supply (regcache,
gdbarch_tdep (gdbarch)->ws_regnum,
&regs->windowstart);
if (regnum == gdbarch_tdep (gdbarch)->lbeg_regnum || regnum == -1)
regcache_raw_supply (regcache,
gdbarch_tdep (gdbarch)->lbeg_regnum,
&regs->lbeg);
if (regnum == gdbarch_tdep (gdbarch)->lend_regnum || regnum == -1)
regcache_raw_supply (regcache,
gdbarch_tdep (gdbarch)->lend_regnum,
&regs->lend);
if (regnum == gdbarch_tdep (gdbarch)->lcount_regnum || regnum == -1)
regcache_raw_supply (regcache,
gdbarch_tdep (gdbarch)->lcount_regnum,
&regs->lcount);
if (regnum == gdbarch_tdep (gdbarch)->sar_regnum || regnum == -1)
regcache_raw_supply (regcache,
gdbarch_tdep (gdbarch)->sar_regnum,
&regs->sar);
if (regnum >=gdbarch_tdep (gdbarch)->ar_base
&& regnum < gdbarch_tdep (gdbarch)->ar_base
+ gdbarch_tdep (gdbarch)->num_aregs)
regcache_raw_supply (regcache,regnum,
&regs->ar[regnum - gdbarch_tdep (gdbarch)->ar_base]);
else if (regnum == -1)
{
for (i = 0; i < gdbarch_tdep (gdbarch)->num_aregs; ++i)
regcache_raw_supply (regcache,
gdbarch_tdep (gdbarch)->ar_base + i,
&regs->ar[i]);
}
}
void
supply_gregset (struct regcache *regcache, const gdb_gregset_t *gregsetp)
{
supply_gregset_reg (regcache, gregsetp, -1);
}
void
fill_fpregset (const struct regcache *regcache,
gdb_fpregset_t *fpregsetp, int regnum)
{
return;
}
void
supply_fpregset (struct regcache *regcache,
const gdb_fpregset_t *fpregsetp)
{
return;
}
/* Fetch greg-register(s) from process/thread TID
and store value(s) in GDB's register array. */
static void
fetch_gregs (struct regcache *regcache, int regnum)
{
int tid = GET_THREAD_ID (inferior_ptid);
const gdb_gregset_t regs;
int areg;
if (ptrace (PTRACE_GETREGS, tid, 0, (long) &regs) < 0)
{
perror_with_name (_("Couldn't get registers"));
return;
}
supply_gregset_reg (regcache, &regs, regnum);
}
/* Store greg-register(s) in GDB's register
array into the process/thread specified by TID. */
static void
store_gregs (struct regcache *regcache, int regnum)
{
int tid = GET_THREAD_ID (inferior_ptid);
gdb_gregset_t regs;
int areg;
if (ptrace (PTRACE_GETREGS, tid, 0, (long) &regs) < 0)
{
perror_with_name (_("Couldn't get registers"));
return;
}
fill_gregset (regcache, &regs, regnum);
if (ptrace (PTRACE_SETREGS, tid, 0, (long) &regs) < 0)
{
perror_with_name (_("Couldn't write registers"));
return;
}
}
static int xtreg_lo;
static int xtreg_high;
/* Fetch/Store Xtensa TIE registers. Xtensa GNU/Linux PTRACE
interface provides special requests for this. */
static void
fetch_xtregs (struct regcache *regcache, int regnum)
{
int tid = GET_THREAD_ID (inferior_ptid);
const xtensa_regtable_t *ptr;
char xtregs [XTENSA_ELF_XTREG_SIZE];
if (ptrace (PTRACE_GETXTREGS, tid, 0, (long)&xtregs) < 0)
perror_with_name (_("Couldn't get extended registers"));
for (ptr = xtensa_regmap_table; ptr->name; ptr++)
if (regnum == ptr->gdb_regnum || regnum == -1)
regcache_raw_supply (regcache, ptr->gdb_regnum,
xtregs + ptr->ptrace_offset);
}
static void
store_xtregs (struct regcache *regcache, int regnum)
{
int tid = GET_THREAD_ID (inferior_ptid);
const xtensa_regtable_t *ptr;
char xtregs [XTENSA_ELF_XTREG_SIZE];
if (ptrace (PTRACE_GETXTREGS, tid, 0, (long)&xtregs) < 0)
perror_with_name (_("Couldn't get extended registers"));
for (ptr = xtensa_regmap_table; ptr->name; ptr++)
if (regnum == ptr->gdb_regnum || regnum == -1)
regcache_raw_collect (regcache, ptr->gdb_regnum,
xtregs + ptr->ptrace_offset);
if (ptrace (PTRACE_SETXTREGS, tid, 0, (long)&xtregs) < 0)
perror_with_name (_("Couldn't write extended registers"));
}
void
xtensa_linux_fetch_inferior_registers (struct regcache *regcache, int regnum)
{
if (regnum == -1)
{
fetch_gregs (regcache, regnum);
fetch_xtregs (regcache, regnum);
}
else if ((regnum < xtreg_lo) || (regnum > xtreg_high))
fetch_gregs (regcache, regnum);
else
fetch_xtregs (regcache, regnum);
}
void
xtensa_linux_store_inferior_registers (struct regcache *regcache, int regnum)
{
if (regnum == -1)
{
store_gregs (regcache, regnum);
store_xtregs (regcache, regnum);
}
else if ((regnum < xtreg_lo) || (regnum > xtreg_high))
store_gregs (regcache, regnum);
else
store_xtregs (regcache, regnum);
}
void _initialize_xtensa_linux_nat (void);
void
_initialize_xtensa_linux_nat (void)
{
struct target_ops *t;
const xtensa_regtable_t *ptr;
/* Calculate the number range for extended registers. */
xtreg_lo = 1000000000;
xtreg_high = -1;
for (ptr = xtensa_regmap_table; ptr->name; ptr++)
{
if (ptr->gdb_regnum < xtreg_lo)
xtreg_lo = ptr->gdb_regnum;
if (ptr->gdb_regnum > xtreg_high)
xtreg_high = ptr->gdb_regnum;
}
/* Fill in the generic GNU/Linux methods. */
t = linux_target ();
/* Add our register access methods. */
t->to_fetch_registers = xtensa_linux_fetch_inferior_registers;
t->to_store_registers = xtensa_linux_store_inferior_registers;
linux_nat_add_target (t);
}