mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2025-01-06 12:09:26 +08:00
1d506c26d9
This commit is the result of the following actions:
- Running gdb/copyright.py to update all of the copyright headers to
include 2024,
- Manually updating a few files the copyright.py script told me to
update, these files had copyright headers embedded within the
file,
- Regenerating gdbsupport/Makefile.in to refresh it's copyright
date,
- Using grep to find other files that still mentioned 2023. If
these files were updated last year from 2022 to 2023 then I've
updated them this year to 2024.
I'm sure I've probably missed some dates. Feel free to fix them up as
you spot them.
351 lines
10 KiB
C
351 lines
10 KiB
C
/* Xtensa GNU/Linux native support.
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Copyright (C) 2007-2024 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 "gdbsupport/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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/* Defines ps_err_e, struct ps_prochandle. */
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#include "gdb_proc_service.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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class xtensa_linux_nat_target final : public linux_nat_target
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{
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public:
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/* Add our register access methods. */
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void fetch_registers (struct regcache *, int) override;
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void store_registers (struct regcache *, int) override;
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};
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static xtensa_linux_nat_target the_xtensa_linux_nat_target;
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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 = regcache->arch ();
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xtensa_gdbarch_tdep *tdep = gdbarch_tdep<xtensa_gdbarch_tdep> (gdbarch);
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if (regnum == gdbarch_pc_regnum (gdbarch) || regnum == -1)
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regcache->raw_collect (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 (gdbarch_ps_regnum (gdbarch), ®s->ps);
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if (regnum == tdep->wb_regnum || regnum == -1)
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regcache->raw_collect (tdep->wb_regnum,
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®s->windowbase);
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if (regnum == tdep->ws_regnum || regnum == -1)
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regcache->raw_collect (tdep->ws_regnum,
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®s->windowstart);
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if (regnum == tdep->lbeg_regnum || regnum == -1)
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regcache->raw_collect (tdep->lbeg_regnum,
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®s->lbeg);
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if (regnum == tdep->lend_regnum || regnum == -1)
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regcache->raw_collect (tdep->lend_regnum,
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®s->lend);
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if (regnum == tdep->lcount_regnum || regnum == -1)
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regcache->raw_collect (tdep->lcount_regnum,
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®s->lcount);
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if (regnum == tdep->sar_regnum || regnum == -1)
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regcache->raw_collect (tdep->sar_regnum,
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®s->sar);
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if (regnum == tdep->threadptr_regnum || regnum == -1)
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regcache->raw_collect (tdep->threadptr_regnum,
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®s->threadptr);
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if (regnum >=tdep->ar_base
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&& regnum < tdep->ar_base
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+ tdep->num_aregs)
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regcache->raw_collect (regnum,
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®s->ar[regnum - tdep->ar_base]);
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else if (regnum == -1)
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{
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for (i = 0; i < tdep->num_aregs; ++i)
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regcache->raw_collect (tdep->ar_base + i,
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®s->ar[i]);
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}
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if (regnum >= tdep->a0_base
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&& regnum < tdep->a0_base + C0_NREGS)
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regcache->raw_collect (regnum,
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®s->ar[(4 * regs->windowbase + regnum
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- tdep->a0_base)
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% tdep->num_aregs]);
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else if (regnum == -1)
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{
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for (i = 0; i < C0_NREGS; ++i)
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regcache->raw_collect (tdep->a0_base + i,
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(®s->ar[(4 * regs->windowbase + i)
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% tdep->num_aregs]));
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}
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}
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static 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 = regcache->arch ();
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xtensa_gdbarch_tdep *tdep = gdbarch_tdep<xtensa_gdbarch_tdep> (gdbarch);
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if (regnum == gdbarch_pc_regnum (gdbarch) || regnum == -1)
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regcache->raw_supply (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 (gdbarch_ps_regnum (gdbarch), ®s->ps);
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if (regnum == tdep->wb_regnum || regnum == -1)
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regcache->raw_supply (tdep->wb_regnum,
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®s->windowbase);
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if (regnum == tdep->ws_regnum || regnum == -1)
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regcache->raw_supply (tdep->ws_regnum,
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®s->windowstart);
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if (regnum == tdep->lbeg_regnum || regnum == -1)
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regcache->raw_supply (tdep->lbeg_regnum,
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®s->lbeg);
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if (regnum == tdep->lend_regnum || regnum == -1)
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regcache->raw_supply (tdep->lend_regnum,
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®s->lend);
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if (regnum == tdep->lcount_regnum || regnum == -1)
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regcache->raw_supply (tdep->lcount_regnum,
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®s->lcount);
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if (regnum == tdep->sar_regnum || regnum == -1)
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regcache->raw_supply (tdep->sar_regnum,
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®s->sar);
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if (regnum == tdep->threadptr_regnum || regnum == -1)
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regcache->raw_supply (tdep->threadptr_regnum,
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®s->threadptr);
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if (regnum >=tdep->ar_base
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&& regnum < tdep->ar_base
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+ tdep->num_aregs)
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regcache->raw_supply (regnum,
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®s->ar[regnum - tdep->ar_base]);
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else if (regnum == -1)
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{
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for (i = 0; i < tdep->num_aregs; ++i)
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regcache->raw_supply (tdep->ar_base + i,
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®s->ar[i]);
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}
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if (regnum >= tdep->a0_base
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&& regnum < tdep->a0_base + C0_NREGS)
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regcache->raw_supply (regnum,
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®s->ar[(4 * regs->windowbase + regnum
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- tdep->a0_base)
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% tdep->num_aregs]);
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else if (regnum == -1)
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{
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for (i = 0; i < C0_NREGS; ++i)
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regcache->raw_supply (tdep->a0_base + i,
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®s->ar[(4 * regs->windowbase + i)
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% tdep->num_aregs]);
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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 = regcache->ptid ().lwp ();
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gdb_gregset_t regs;
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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 = regcache->ptid ().lwp ();
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gdb_gregset_t regs;
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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 = regcache->ptid ().lwp ();
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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 (ptr->gdb_regnum, 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 = regcache->ptid ().lwp ();
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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 (ptr->gdb_regnum, 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_nat_target::fetch_registers (struct regcache *regcache,
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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_nat_target::store_registers (struct regcache *regcache,
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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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/* Called by libthread_db. */
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ps_err_e
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ps_get_thread_area (struct ps_prochandle *ph,
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lwpid_t lwpid, int idx, void **base)
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{
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xtensa_elf_gregset_t regs;
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if (ptrace (PTRACE_GETREGS, lwpid, NULL, ®s) != 0)
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return PS_ERR;
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/* IDX is the bias from the thread pointer to the beginning of the
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thread descriptor. It has to be subtracted due to implementation
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quirks in libthread_db. */
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*base = (void *) ((char *) regs.threadptr - idx);
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return PS_OK;
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}
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void _initialize_xtensa_linux_nat ();
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void
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_initialize_xtensa_linux_nat ()
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{
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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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linux_target = &the_xtensa_linux_nat_target;
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add_inf_child_target (&the_xtensa_linux_nat_target);
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}
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