40045d9181
These changes allow debugging multithreaded NPTL xtensa applications. 2015-08-20 Max Filippov <jcmvbkbc@gmail.com> gdb/gdbserver/ * configure.srv (xtensa*-*-linux*): Add srv_linux_thread_db=yes. * linux-xtensa-low.c (arch/xtensa.h gdb_proc_service.h): New #includes. (ps_get_thread_area): New function. 2015-08-20 Max Filippov <jcmvbkbc@gmail.com> gdb/ * arch/xtensa.h: New file. * xtensa-linux-nat.c (gdb_proc_service.h): New #include. (ps_get_thread_area): New function. * xtensa-linux-tdep.c (xtensa_linux_init_abi): Add call to set_gdbarch_fetch_tls_load_module_address to enable TLS support. * xtensa-tdep.c (osabi.h): New #include. (xtensa_gdbarch_init): Call gdbarch_init_osabi to register xtensa-specific hooks. * xtensa-tdep.h (struct xtensa_elf_gregset_t): Add threadptr member and move the structure to arch/xtensa.h.
332 lines
9.7 KiB
C
332 lines
9.7 KiB
C
/* Xtensa GNU/Linux native support.
|
|
|
|
Copyright (C) 2007-2015 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 "frame.h"
|
|
#include "inferior.h"
|
|
#include "gdbcore.h"
|
|
#include "regcache.h"
|
|
#include "target.h"
|
|
#include "linux-nat.h"
|
|
#include <sys/types.h>
|
|
#include <signal.h>
|
|
#include <sys/user.h>
|
|
#include <sys/ioctl.h>
|
|
#include "gdb_wait.h"
|
|
#include <fcntl.h>
|
|
#include <sys/procfs.h>
|
|
#include "nat/gdb_ptrace.h"
|
|
#include <asm/ptrace.h>
|
|
|
|
#include "gregset.h"
|
|
#include "xtensa-tdep.h"
|
|
|
|
/* Defines ps_err_e, struct ps_prochandle. */
|
|
#include "gdb_proc_service.h"
|
|
|
|
/* Extended register set depends on hardware configs.
|
|
Keeping these definitions separately allows to introduce
|
|
hardware-specific overlays. */
|
|
#include "xtensa-xtregs.c"
|
|
|
|
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), ®s->pc);
|
|
if (regnum == gdbarch_ps_regnum (gdbarch) || regnum == -1)
|
|
regcache_raw_collect (regcache, gdbarch_ps_regnum (gdbarch), ®s->ps);
|
|
|
|
if (regnum == gdbarch_tdep (gdbarch)->wb_regnum || regnum == -1)
|
|
regcache_raw_collect (regcache,
|
|
gdbarch_tdep (gdbarch)->wb_regnum,
|
|
®s->windowbase);
|
|
if (regnum == gdbarch_tdep (gdbarch)->ws_regnum || regnum == -1)
|
|
regcache_raw_collect (regcache,
|
|
gdbarch_tdep (gdbarch)->ws_regnum,
|
|
®s->windowstart);
|
|
if (regnum == gdbarch_tdep (gdbarch)->lbeg_regnum || regnum == -1)
|
|
regcache_raw_collect (regcache,
|
|
gdbarch_tdep (gdbarch)->lbeg_regnum,
|
|
®s->lbeg);
|
|
if (regnum == gdbarch_tdep (gdbarch)->lend_regnum || regnum == -1)
|
|
regcache_raw_collect (regcache,
|
|
gdbarch_tdep (gdbarch)->lend_regnum,
|
|
®s->lend);
|
|
if (regnum == gdbarch_tdep (gdbarch)->lcount_regnum || regnum == -1)
|
|
regcache_raw_collect (regcache,
|
|
gdbarch_tdep (gdbarch)->lcount_regnum,
|
|
®s->lcount);
|
|
if (regnum == gdbarch_tdep (gdbarch)->sar_regnum || regnum == -1)
|
|
regcache_raw_collect (regcache,
|
|
gdbarch_tdep (gdbarch)->sar_regnum,
|
|
®s->sar);
|
|
if (regnum >=gdbarch_tdep (gdbarch)->ar_base
|
|
&& regnum < gdbarch_tdep (gdbarch)->ar_base
|
|
+ gdbarch_tdep (gdbarch)->num_aregs)
|
|
regcache_raw_collect (regcache,regnum,
|
|
®s->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,
|
|
®s->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), ®s->pc);
|
|
if (regnum == gdbarch_ps_regnum (gdbarch) || regnum == -1)
|
|
regcache_raw_supply (regcache, gdbarch_ps_regnum (gdbarch), ®s->ps);
|
|
|
|
if (regnum == gdbarch_tdep (gdbarch)->wb_regnum || regnum == -1)
|
|
regcache_raw_supply (regcache,
|
|
gdbarch_tdep (gdbarch)->wb_regnum,
|
|
®s->windowbase);
|
|
if (regnum == gdbarch_tdep (gdbarch)->ws_regnum || regnum == -1)
|
|
regcache_raw_supply (regcache,
|
|
gdbarch_tdep (gdbarch)->ws_regnum,
|
|
®s->windowstart);
|
|
if (regnum == gdbarch_tdep (gdbarch)->lbeg_regnum || regnum == -1)
|
|
regcache_raw_supply (regcache,
|
|
gdbarch_tdep (gdbarch)->lbeg_regnum,
|
|
®s->lbeg);
|
|
if (regnum == gdbarch_tdep (gdbarch)->lend_regnum || regnum == -1)
|
|
regcache_raw_supply (regcache,
|
|
gdbarch_tdep (gdbarch)->lend_regnum,
|
|
®s->lend);
|
|
if (regnum == gdbarch_tdep (gdbarch)->lcount_regnum || regnum == -1)
|
|
regcache_raw_supply (regcache,
|
|
gdbarch_tdep (gdbarch)->lcount_regnum,
|
|
®s->lcount);
|
|
if (regnum == gdbarch_tdep (gdbarch)->sar_regnum || regnum == -1)
|
|
regcache_raw_supply (regcache,
|
|
gdbarch_tdep (gdbarch)->sar_regnum,
|
|
®s->sar);
|
|
if (regnum >=gdbarch_tdep (gdbarch)->ar_base
|
|
&& regnum < gdbarch_tdep (gdbarch)->ar_base
|
|
+ gdbarch_tdep (gdbarch)->num_aregs)
|
|
regcache_raw_supply (regcache,regnum,
|
|
®s->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,
|
|
®s->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 = ptid_get_lwp (inferior_ptid);
|
|
const gdb_gregset_t regs;
|
|
int areg;
|
|
|
|
if (ptrace (PTRACE_GETREGS, tid, 0, (long) ®s) < 0)
|
|
{
|
|
perror_with_name (_("Couldn't get registers"));
|
|
return;
|
|
}
|
|
|
|
supply_gregset_reg (regcache, ®s, 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 = ptid_get_lwp (inferior_ptid);
|
|
gdb_gregset_t regs;
|
|
int areg;
|
|
|
|
if (ptrace (PTRACE_GETREGS, tid, 0, (long) ®s) < 0)
|
|
{
|
|
perror_with_name (_("Couldn't get registers"));
|
|
return;
|
|
}
|
|
|
|
fill_gregset (regcache, ®s, regnum);
|
|
|
|
if (ptrace (PTRACE_SETREGS, tid, 0, (long) ®s) < 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 = ptid_get_lwp (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 = ptid_get_lwp (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 target_ops *ops,
|
|
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 target_ops *ops,
|
|
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);
|
|
}
|
|
|
|
/* Called by libthread_db. */
|
|
|
|
ps_err_e
|
|
ps_get_thread_area (const struct ps_prochandle *ph,
|
|
lwpid_t lwpid, int idx, void **base)
|
|
{
|
|
xtensa_elf_gregset_t regs;
|
|
|
|
if (ptrace (PTRACE_GETREGS, lwpid, NULL, ®s) != 0)
|
|
return PS_ERR;
|
|
|
|
/* IDX is the bias from the thread pointer to the beginning of the
|
|
thread descriptor. It has to be subtracted due to implementation
|
|
quirks in libthread_db. */
|
|
*base = (void *) ((char *) regs.threadptr - idx);
|
|
|
|
return PS_OK;
|
|
}
|
|
|
|
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);
|
|
}
|