d89fa914ad
This patch removes get_thread_id from aarch64-linux-nat.c,
arm-linux-nat.c and xtensa-linux-nat.c.
get_thread_id was added in this commit below in 2000,
41c49b06c4
https://sourceware.org/ml/gdb-patches/2000-04/msg00398.html
which predates the ptid_t stuff added into GDB. Nowadays, lwpid of
inferior_ptid is only zero when the inferior is created (in
fork-child.c:fork_inferior) and its lwpid will be set after
linux_nat_wait_1 gets the first event. After that, lwpid of
inferior_ptid is not zero for linux-nat target, then we can use
ptid_get_lwp, so this function isn't needed anymore.
Even when GDB attaches to a process, the lwp of inferior_ptid
isn't zero, see linux-nat.c:linux_nat_attach,
/* The ptrace base target adds the main thread with (pid,0,0)
format. Decorate it with lwp info. */
ptid = ptid_build (ptid_get_pid (inferior_ptid),
ptid_get_pid (inferior_ptid),
0);
Note that linux_nat_xfer_partial shifts lwpid to pid for inferior_ptid
temperately for calling linux_ops->to_xfer_partial, but all the
affected functions in this patch are not called in
linux_ops->to_xfer_partial.
I think we can safely remove get_thread_id for all linux native targets.
Regression tested on arm-linux and aarch64-linux. Unable to build
native GDB and test it on xtensa-linux.
gdb:
2015-08-05 Yao Qi <yao.qi@linaro.org>
* aarch64-linux-nat.c (get_thread_id): Remove.
(debug_reg_change_callback): Call ptid_get_lwp instead of
get_thread_id.
(fetch_gregs_from_thread): Likewise.
(store_gregs_to_thread): Likewise.
(fetch_fpregs_from_thread): Likewise.
(store_fpregs_to_thread): Likewise.
(aarch64_linux_get_debug_reg_capacity): Likewise.
* arm-linux-nat.c (get_thread_id): Remove.
(GET_THREAD_ID): Update macro to use ptid_get_lwp.
* xtensa-linux-nat.c (get_thread_id): Remove.
(GET_THREAD_ID): Update macro to use ptid_get_lwp.
* arm-linux-nat.c (get_thread_id): Remove.
(GET_THREAD_ID): Remove.
(fetch_fpregs): Call ptid_get_lwp instead of GET_THREAD_ID.
(store_fpregs, fetch_regs, store_regs): Likewise.
(fetch_wmmx_regs, store_wmmx_regs): Likewise.
(fetch_vfp_regs, store_vfp_regs): Likewise.
(arm_linux_read_description): Likewise.
(arm_linux_get_hwbp_cap): Likewise.
* xtensa-linux-nat.c (get_thread_id): Remove.
(GET_THREAD_ID): Remove.
(fetch_gregs, store_gregs): Call ptid_get_lwp instead of
GET_THREAD_ID.
310 lines
9.1 KiB
C
310 lines
9.1 KiB
C
/* Xtensa GNU/Linux native support.
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Copyright (C) 2007-2015 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 "frame.h"
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#include "inferior.h"
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#include "gdbcore.h"
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#include "regcache.h"
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#include "target.h"
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#include "linux-nat.h"
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#include <sys/types.h>
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#include <signal.h>
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#include <sys/user.h>
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#include <sys/ioctl.h>
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#include "gdb_wait.h"
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#include <fcntl.h>
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#include <sys/procfs.h>
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#include "nat/gdb_ptrace.h"
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#include <asm/ptrace.h>
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#include "gregset.h"
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#include "xtensa-tdep.h"
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/* Extended register set depends on hardware configs.
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Keeping these definitions separately allows to introduce
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hardware-specific overlays. */
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#include "xtensa-xtregs.c"
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void
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fill_gregset (const struct regcache *regcache,
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gdb_gregset_t *gregsetp, int regnum)
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{
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int i;
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xtensa_elf_gregset_t *regs = (xtensa_elf_gregset_t *) gregsetp;
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struct gdbarch *gdbarch = get_regcache_arch (regcache);
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if (regnum == gdbarch_pc_regnum (gdbarch) || regnum == -1)
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regcache_raw_collect (regcache, gdbarch_pc_regnum (gdbarch), ®s->pc);
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if (regnum == gdbarch_ps_regnum (gdbarch) || regnum == -1)
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regcache_raw_collect (regcache, gdbarch_ps_regnum (gdbarch), ®s->ps);
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if (regnum == gdbarch_tdep (gdbarch)->wb_regnum || regnum == -1)
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regcache_raw_collect (regcache,
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gdbarch_tdep (gdbarch)->wb_regnum,
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®s->windowbase);
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if (regnum == gdbarch_tdep (gdbarch)->ws_regnum || regnum == -1)
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regcache_raw_collect (regcache,
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gdbarch_tdep (gdbarch)->ws_regnum,
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®s->windowstart);
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if (regnum == gdbarch_tdep (gdbarch)->lbeg_regnum || regnum == -1)
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regcache_raw_collect (regcache,
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gdbarch_tdep (gdbarch)->lbeg_regnum,
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®s->lbeg);
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if (regnum == gdbarch_tdep (gdbarch)->lend_regnum || regnum == -1)
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regcache_raw_collect (regcache,
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gdbarch_tdep (gdbarch)->lend_regnum,
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®s->lend);
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if (regnum == gdbarch_tdep (gdbarch)->lcount_regnum || regnum == -1)
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regcache_raw_collect (regcache,
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gdbarch_tdep (gdbarch)->lcount_regnum,
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®s->lcount);
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if (regnum == gdbarch_tdep (gdbarch)->sar_regnum || regnum == -1)
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regcache_raw_collect (regcache,
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gdbarch_tdep (gdbarch)->sar_regnum,
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®s->sar);
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if (regnum >=gdbarch_tdep (gdbarch)->ar_base
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&& regnum < gdbarch_tdep (gdbarch)->ar_base
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+ gdbarch_tdep (gdbarch)->num_aregs)
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regcache_raw_collect (regcache,regnum,
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®s->ar[regnum - gdbarch_tdep (gdbarch)->ar_base]);
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else if (regnum == -1)
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{
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for (i = 0; i < gdbarch_tdep (gdbarch)->num_aregs; ++i)
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regcache_raw_collect (regcache,
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gdbarch_tdep (gdbarch)->ar_base + i,
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®s->ar[i]);
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}
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}
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void
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supply_gregset_reg (struct regcache *regcache,
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const gdb_gregset_t *gregsetp, int regnum)
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{
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int i;
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xtensa_elf_gregset_t *regs = (xtensa_elf_gregset_t *) gregsetp;
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struct gdbarch *gdbarch = get_regcache_arch (regcache);
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if (regnum == gdbarch_pc_regnum (gdbarch) || regnum == -1)
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regcache_raw_supply (regcache, gdbarch_pc_regnum (gdbarch), ®s->pc);
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if (regnum == gdbarch_ps_regnum (gdbarch) || regnum == -1)
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regcache_raw_supply (regcache, gdbarch_ps_regnum (gdbarch), ®s->ps);
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if (regnum == gdbarch_tdep (gdbarch)->wb_regnum || regnum == -1)
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regcache_raw_supply (regcache,
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gdbarch_tdep (gdbarch)->wb_regnum,
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®s->windowbase);
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if (regnum == gdbarch_tdep (gdbarch)->ws_regnum || regnum == -1)
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regcache_raw_supply (regcache,
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gdbarch_tdep (gdbarch)->ws_regnum,
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®s->windowstart);
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if (regnum == gdbarch_tdep (gdbarch)->lbeg_regnum || regnum == -1)
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regcache_raw_supply (regcache,
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gdbarch_tdep (gdbarch)->lbeg_regnum,
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®s->lbeg);
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if (regnum == gdbarch_tdep (gdbarch)->lend_regnum || regnum == -1)
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regcache_raw_supply (regcache,
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gdbarch_tdep (gdbarch)->lend_regnum,
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®s->lend);
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if (regnum == gdbarch_tdep (gdbarch)->lcount_regnum || regnum == -1)
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regcache_raw_supply (regcache,
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gdbarch_tdep (gdbarch)->lcount_regnum,
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®s->lcount);
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if (regnum == gdbarch_tdep (gdbarch)->sar_regnum || regnum == -1)
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regcache_raw_supply (regcache,
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gdbarch_tdep (gdbarch)->sar_regnum,
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®s->sar);
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if (regnum >=gdbarch_tdep (gdbarch)->ar_base
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&& regnum < gdbarch_tdep (gdbarch)->ar_base
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+ gdbarch_tdep (gdbarch)->num_aregs)
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regcache_raw_supply (regcache,regnum,
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®s->ar[regnum - gdbarch_tdep (gdbarch)->ar_base]);
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else if (regnum == -1)
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{
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for (i = 0; i < gdbarch_tdep (gdbarch)->num_aregs; ++i)
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regcache_raw_supply (regcache,
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gdbarch_tdep (gdbarch)->ar_base + i,
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®s->ar[i]);
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}
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}
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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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supply_gregset_reg (regcache, gregsetp, -1);
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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 regnum)
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{
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return;
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}
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void
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supply_fpregset (struct regcache *regcache,
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const gdb_fpregset_t *fpregsetp)
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{
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return;
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}
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/* Fetch greg-register(s) from process/thread TID
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and store value(s) in GDB's register array. */
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static void
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fetch_gregs (struct regcache *regcache, int regnum)
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{
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int tid = ptid_get_lwp (inferior_ptid);
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const gdb_gregset_t regs;
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int areg;
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if (ptrace (PTRACE_GETREGS, tid, 0, (long) ®s) < 0)
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{
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perror_with_name (_("Couldn't get registers"));
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return;
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}
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supply_gregset_reg (regcache, ®s, regnum);
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}
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/* Store greg-register(s) in GDB's register
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array into the process/thread specified by TID. */
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static void
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store_gregs (struct regcache *regcache, int regnum)
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{
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int tid = ptid_get_lwp (inferior_ptid);
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gdb_gregset_t regs;
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int areg;
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if (ptrace (PTRACE_GETREGS, tid, 0, (long) ®s) < 0)
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{
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perror_with_name (_("Couldn't get registers"));
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return;
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}
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fill_gregset (regcache, ®s, regnum);
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if (ptrace (PTRACE_SETREGS, tid, 0, (long) ®s) < 0)
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{
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perror_with_name (_("Couldn't write registers"));
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return;
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}
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}
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static int xtreg_lo;
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static int xtreg_high;
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/* Fetch/Store Xtensa TIE registers. Xtensa GNU/Linux PTRACE
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interface provides special requests for this. */
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static void
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fetch_xtregs (struct regcache *regcache, int regnum)
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{
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int tid = ptid_get_lwp (inferior_ptid);
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const xtensa_regtable_t *ptr;
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char xtregs [XTENSA_ELF_XTREG_SIZE];
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if (ptrace (PTRACE_GETXTREGS, tid, 0, (long)&xtregs) < 0)
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perror_with_name (_("Couldn't get extended registers"));
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for (ptr = xtensa_regmap_table; ptr->name; ptr++)
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if (regnum == ptr->gdb_regnum || regnum == -1)
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regcache_raw_supply (regcache, ptr->gdb_regnum,
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xtregs + ptr->ptrace_offset);
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}
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static void
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store_xtregs (struct regcache *regcache, int regnum)
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{
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int tid = ptid_get_lwp (inferior_ptid);
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const xtensa_regtable_t *ptr;
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char xtregs [XTENSA_ELF_XTREG_SIZE];
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if (ptrace (PTRACE_GETXTREGS, tid, 0, (long)&xtregs) < 0)
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perror_with_name (_("Couldn't get extended registers"));
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for (ptr = xtensa_regmap_table; ptr->name; ptr++)
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if (regnum == ptr->gdb_regnum || regnum == -1)
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regcache_raw_collect (regcache, ptr->gdb_regnum,
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xtregs + ptr->ptrace_offset);
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if (ptrace (PTRACE_SETXTREGS, tid, 0, (long)&xtregs) < 0)
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perror_with_name (_("Couldn't write extended registers"));
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}
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void
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xtensa_linux_fetch_inferior_registers (struct target_ops *ops,
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struct regcache *regcache, int regnum)
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{
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if (regnum == -1)
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{
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fetch_gregs (regcache, regnum);
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fetch_xtregs (regcache, regnum);
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}
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else if ((regnum < xtreg_lo) || (regnum > xtreg_high))
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fetch_gregs (regcache, regnum);
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else
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fetch_xtregs (regcache, regnum);
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}
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void
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xtensa_linux_store_inferior_registers (struct target_ops *ops,
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struct regcache *regcache, int regnum)
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{
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if (regnum == -1)
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{
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store_gregs (regcache, regnum);
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store_xtregs (regcache, regnum);
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}
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else if ((regnum < xtreg_lo) || (regnum > xtreg_high))
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store_gregs (regcache, regnum);
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else
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store_xtregs (regcache, regnum);
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}
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void _initialize_xtensa_linux_nat (void);
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void
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_initialize_xtensa_linux_nat (void)
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{
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struct target_ops *t;
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const xtensa_regtable_t *ptr;
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/* Calculate the number range for extended registers. */
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xtreg_lo = 1000000000;
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xtreg_high = -1;
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for (ptr = xtensa_regmap_table; ptr->name; ptr++)
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{
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if (ptr->gdb_regnum < xtreg_lo)
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xtreg_lo = ptr->gdb_regnum;
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if (ptr->gdb_regnum > xtreg_high)
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xtreg_high = ptr->gdb_regnum;
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}
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/* Fill in the generic GNU/Linux methods. */
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t = linux_target ();
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/* Add our register access methods. */
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t->to_fetch_registers = xtensa_linux_fetch_inferior_registers;
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t->to_store_registers = xtensa_linux_store_inferior_registers;
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linux_nat_add_target (t);
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}
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