mirror of
https://sourceware.org/git/binutils-gdb.git
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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.
581 lines
18 KiB
C
581 lines
18 KiB
C
/* Target-dependent code for FreeBSD/mips.
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Copyright (C) 2017-2024 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 "osabi.h"
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#include "regset.h"
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#include "trad-frame.h"
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#include "tramp-frame.h"
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#include "fbsd-tdep.h"
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#include "mips-tdep.h"
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#include "mips-fbsd-tdep.h"
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#include "solib-svr4.h"
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/* Core file support. */
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/* Number of registers in `struct reg' from <machine/reg.h>. The
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first 38 follow the standard MIPS layout. The 39th holds
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IC_INT_REG on RM7K and RM9K processors. The 40th is a dummy for
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padding. */
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#define MIPS_FBSD_NUM_GREGS 40
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/* Number of registers in `struct fpreg' from <machine/reg.h>. The
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first 32 hold floating point registers. 33 holds the FSR. The
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34th holds FIR on FreeBSD 12.0 and newer kernels. On older kernels
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it was a zero-filled dummy for padding. */
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#define MIPS_FBSD_NUM_FPREGS 34
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/* Supply a single register. The register size might not match, so use
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regcache->raw_supply_integer (). */
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static void
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mips_fbsd_supply_reg (struct regcache *regcache, int regnum, const void *addr,
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size_t len)
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{
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regcache->raw_supply_integer (regnum, (const gdb_byte *) addr, len, true);
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}
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/* Collect a single register. The register size might not match, so use
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regcache->raw_collect_integer (). */
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static void
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mips_fbsd_collect_reg (const struct regcache *regcache, int regnum, void *addr,
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size_t len)
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{
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regcache->raw_collect_integer (regnum, (gdb_byte *) addr, len, true);
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}
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/* Supply the floating-point registers stored in FPREGS to REGCACHE.
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Each floating-point register in FPREGS is REGSIZE bytes in
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length. */
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void
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mips_fbsd_supply_fpregs (struct regcache *regcache, int regnum,
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const void *fpregs, size_t regsize)
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{
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struct gdbarch *gdbarch = regcache->arch ();
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const gdb_byte *regs = (const gdb_byte *) fpregs;
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int i, fp0num;
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fp0num = mips_regnum (gdbarch)->fp0;
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for (i = 0; i <= 32; i++)
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if (regnum == fp0num + i || regnum == -1)
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mips_fbsd_supply_reg (regcache, fp0num + i,
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regs + i * regsize, regsize);
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if (regnum == mips_regnum (gdbarch)->fp_control_status || regnum == -1)
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mips_fbsd_supply_reg (regcache, mips_regnum (gdbarch)->fp_control_status,
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regs + 32 * regsize, regsize);
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if ((regnum == mips_regnum (gdbarch)->fp_implementation_revision
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|| regnum == -1)
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&& extract_unsigned_integer (regs + 33 * regsize, regsize,
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gdbarch_byte_order (gdbarch)) != 0)
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mips_fbsd_supply_reg (regcache,
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mips_regnum (gdbarch)->fp_implementation_revision,
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regs + 33 * regsize, regsize);
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}
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/* Supply the general-purpose registers stored in GREGS to REGCACHE.
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Each general-purpose register in GREGS is REGSIZE bytes in
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length. */
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void
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mips_fbsd_supply_gregs (struct regcache *regcache, int regnum,
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const void *gregs, size_t regsize)
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{
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struct gdbarch *gdbarch = regcache->arch ();
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const gdb_byte *regs = (const gdb_byte *) gregs;
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int i;
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for (i = 0; i <= mips_regnum (gdbarch)->pc; i++)
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if (regnum == i || regnum == -1)
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mips_fbsd_supply_reg (regcache, i, regs + i * regsize, regsize);
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}
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/* Collect the floating-point registers from REGCACHE and store them
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in FPREGS. Each floating-point register in FPREGS is REGSIZE bytes
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in length. */
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void
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mips_fbsd_collect_fpregs (const struct regcache *regcache, int regnum,
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void *fpregs, size_t regsize)
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{
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struct gdbarch *gdbarch = regcache->arch ();
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gdb_byte *regs = (gdb_byte *) fpregs;
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int i, fp0num;
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fp0num = mips_regnum (gdbarch)->fp0;
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for (i = 0; i < 32; i++)
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if (regnum == fp0num + i || regnum == -1)
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mips_fbsd_collect_reg (regcache, fp0num + i,
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regs + i * regsize, regsize);
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if (regnum == mips_regnum (gdbarch)->fp_control_status || regnum == -1)
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mips_fbsd_collect_reg (regcache, mips_regnum (gdbarch)->fp_control_status,
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regs + 32 * regsize, regsize);
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if (regnum == mips_regnum (gdbarch)->fp_implementation_revision
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|| regnum == -1)
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mips_fbsd_collect_reg (regcache,
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mips_regnum (gdbarch)->fp_implementation_revision,
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regs + 33 * regsize, regsize);
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}
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/* Collect the general-purpose registers from REGCACHE and store them
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in GREGS. Each general-purpose register in GREGS is REGSIZE bytes
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in length. */
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void
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mips_fbsd_collect_gregs (const struct regcache *regcache, int regnum,
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void *gregs, size_t regsize)
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{
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struct gdbarch *gdbarch = regcache->arch ();
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gdb_byte *regs = (gdb_byte *) gregs;
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int i;
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for (i = 0; i <= mips_regnum (gdbarch)->pc; i++)
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if (regnum == i || regnum == -1)
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mips_fbsd_collect_reg (regcache, i, regs + i * regsize, regsize);
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}
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/* Supply register REGNUM from the buffer specified by FPREGS and LEN
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in the floating-point register set REGSET to register cache
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REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */
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static void
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mips_fbsd_supply_fpregset (const struct regset *regset,
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struct regcache *regcache,
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int regnum, const void *fpregs, size_t len)
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{
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size_t regsize = mips_abi_regsize (regcache->arch ());
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gdb_assert (len >= MIPS_FBSD_NUM_FPREGS * regsize);
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mips_fbsd_supply_fpregs (regcache, regnum, fpregs, regsize);
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}
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/* Collect register REGNUM from the register cache REGCACHE and store
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it in the buffer specified by FPREGS and LEN in the floating-point
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register set REGSET. If REGNUM is -1, do this for all registers in
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REGSET. */
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static void
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mips_fbsd_collect_fpregset (const struct regset *regset,
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const struct regcache *regcache,
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int regnum, void *fpregs, size_t len)
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{
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size_t regsize = mips_abi_regsize (regcache->arch ());
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gdb_assert (len >= MIPS_FBSD_NUM_FPREGS * regsize);
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mips_fbsd_collect_fpregs (regcache, regnum, fpregs, regsize);
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}
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/* Supply register REGNUM from the buffer specified by GREGS and LEN
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in the general-purpose register set REGSET to register cache
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REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */
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static void
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mips_fbsd_supply_gregset (const struct regset *regset,
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struct regcache *regcache, int regnum,
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const void *gregs, size_t len)
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{
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size_t regsize = mips_abi_regsize (regcache->arch ());
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gdb_assert (len >= MIPS_FBSD_NUM_GREGS * regsize);
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mips_fbsd_supply_gregs (regcache, regnum, gregs, regsize);
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}
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/* Collect register REGNUM from the register cache REGCACHE and store
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it in the buffer specified by GREGS and LEN in the general-purpose
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register set REGSET. If REGNUM is -1, do this for all registers in
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REGSET. */
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static void
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mips_fbsd_collect_gregset (const struct regset *regset,
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const struct regcache *regcache,
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int regnum, void *gregs, size_t len)
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{
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size_t regsize = mips_abi_regsize (regcache->arch ());
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gdb_assert (len >= MIPS_FBSD_NUM_GREGS * regsize);
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mips_fbsd_collect_gregs (regcache, regnum, gregs, regsize);
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}
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/* FreeBSD/mips register sets. */
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static const struct regset mips_fbsd_gregset =
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{
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NULL,
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mips_fbsd_supply_gregset,
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mips_fbsd_collect_gregset,
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};
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static const struct regset mips_fbsd_fpregset =
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{
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NULL,
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mips_fbsd_supply_fpregset,
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mips_fbsd_collect_fpregset,
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};
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/* Iterate over core file register note sections. */
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static void
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mips_fbsd_iterate_over_regset_sections (struct gdbarch *gdbarch,
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iterate_over_regset_sections_cb *cb,
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void *cb_data,
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const struct regcache *regcache)
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{
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size_t regsize = mips_abi_regsize (gdbarch);
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cb (".reg", MIPS_FBSD_NUM_GREGS * regsize, MIPS_FBSD_NUM_GREGS * regsize,
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&mips_fbsd_gregset, NULL, cb_data);
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cb (".reg2", MIPS_FBSD_NUM_FPREGS * regsize, MIPS_FBSD_NUM_FPREGS * regsize,
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&mips_fbsd_fpregset, NULL, cb_data);
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}
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/* Signal trampoline support. */
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#define FBSD_SYS_sigreturn 417
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#define MIPS_INST_LI_V0_SIGRETURN 0x24020000 + FBSD_SYS_sigreturn
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#define MIPS_INST_SYSCALL 0x0000000c
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#define MIPS_INST_BREAK 0x0000000d
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#define O32_SIGFRAME_UCONTEXT_OFFSET (16)
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#define O32_SIGSET_T_SIZE (16)
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#define O32_UCONTEXT_ONSTACK (O32_SIGSET_T_SIZE)
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#define O32_UCONTEXT_PC (O32_UCONTEXT_ONSTACK + 4)
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#define O32_UCONTEXT_REGS (O32_UCONTEXT_PC + 4)
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#define O32_UCONTEXT_SR (O32_UCONTEXT_REGS + 4 * 32)
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#define O32_UCONTEXT_LO (O32_UCONTEXT_SR + 4)
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#define O32_UCONTEXT_HI (O32_UCONTEXT_LO + 4)
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#define O32_UCONTEXT_FPUSED (O32_UCONTEXT_HI + 4)
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#define O32_UCONTEXT_FPREGS (O32_UCONTEXT_FPUSED + 4)
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#define O32_UCONTEXT_REG_SIZE 4
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static void
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mips_fbsd_sigframe_init (const struct tramp_frame *self,
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frame_info_ptr this_frame,
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struct trad_frame_cache *cache,
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CORE_ADDR func)
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{
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struct gdbarch *gdbarch = get_frame_arch (this_frame);
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enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
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CORE_ADDR sp, ucontext_addr, addr;
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int regnum;
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gdb_byte buf[4];
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/* We find the appropriate instance of `ucontext_t' at a
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fixed offset in the signal frame. */
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sp = get_frame_register_signed (this_frame,
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MIPS_SP_REGNUM + gdbarch_num_regs (gdbarch));
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ucontext_addr = sp + O32_SIGFRAME_UCONTEXT_OFFSET;
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/* PC. */
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regnum = mips_regnum (gdbarch)->pc;
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trad_frame_set_reg_addr (cache,
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regnum + gdbarch_num_regs (gdbarch),
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ucontext_addr + O32_UCONTEXT_PC);
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/* GPRs. */
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for (regnum = MIPS_ZERO_REGNUM, addr = ucontext_addr + O32_UCONTEXT_REGS;
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regnum <= MIPS_RA_REGNUM; regnum++, addr += O32_UCONTEXT_REG_SIZE)
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trad_frame_set_reg_addr (cache,
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regnum + gdbarch_num_regs (gdbarch),
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addr);
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regnum = MIPS_PS_REGNUM;
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trad_frame_set_reg_addr (cache,
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regnum + gdbarch_num_regs (gdbarch),
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ucontext_addr + O32_UCONTEXT_SR);
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/* HI and LO. */
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regnum = mips_regnum (gdbarch)->lo;
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trad_frame_set_reg_addr (cache,
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regnum + gdbarch_num_regs (gdbarch),
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ucontext_addr + O32_UCONTEXT_LO);
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regnum = mips_regnum (gdbarch)->hi;
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trad_frame_set_reg_addr (cache,
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regnum + gdbarch_num_regs (gdbarch),
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ucontext_addr + O32_UCONTEXT_HI);
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if (target_read_memory (ucontext_addr + O32_UCONTEXT_FPUSED, buf, 4) == 0
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&& extract_unsigned_integer (buf, 4, byte_order) != 0)
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{
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for (regnum = 0, addr = ucontext_addr + O32_UCONTEXT_FPREGS;
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regnum < 32; regnum++, addr += O32_UCONTEXT_REG_SIZE)
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trad_frame_set_reg_addr (cache,
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regnum + gdbarch_fp0_regnum (gdbarch),
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addr);
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trad_frame_set_reg_addr (cache, mips_regnum (gdbarch)->fp_control_status,
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addr);
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}
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trad_frame_set_id (cache, frame_id_build (sp, func));
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}
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#define MIPS_INST_ADDIU_A0_SP_O32 (0x27a40000 \
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+ O32_SIGFRAME_UCONTEXT_OFFSET)
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static const struct tramp_frame mips_fbsd_sigframe =
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{
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SIGTRAMP_FRAME,
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MIPS_INSN32_SIZE,
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{
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{ MIPS_INST_ADDIU_A0_SP_O32, ULONGEST_MAX }, /* addiu a0, sp, SIGF_UC */
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{ MIPS_INST_LI_V0_SIGRETURN, ULONGEST_MAX }, /* li v0, SYS_sigreturn */
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{ MIPS_INST_SYSCALL, ULONGEST_MAX }, /* syscall */
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{ MIPS_INST_BREAK, ULONGEST_MAX }, /* break */
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{ TRAMP_SENTINEL_INSN, ULONGEST_MAX }
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},
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mips_fbsd_sigframe_init
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};
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#define N64_SIGFRAME_UCONTEXT_OFFSET (32)
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#define N64_SIGSET_T_SIZE (16)
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#define N64_UCONTEXT_ONSTACK (N64_SIGSET_T_SIZE)
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#define N64_UCONTEXT_PC (N64_UCONTEXT_ONSTACK + 8)
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#define N64_UCONTEXT_REGS (N64_UCONTEXT_PC + 8)
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#define N64_UCONTEXT_SR (N64_UCONTEXT_REGS + 8 * 32)
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#define N64_UCONTEXT_LO (N64_UCONTEXT_SR + 8)
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#define N64_UCONTEXT_HI (N64_UCONTEXT_LO + 8)
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#define N64_UCONTEXT_FPUSED (N64_UCONTEXT_HI + 8)
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#define N64_UCONTEXT_FPREGS (N64_UCONTEXT_FPUSED + 8)
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#define N64_UCONTEXT_REG_SIZE 8
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static void
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mips64_fbsd_sigframe_init (const struct tramp_frame *self,
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frame_info_ptr this_frame,
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struct trad_frame_cache *cache,
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CORE_ADDR func)
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{
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struct gdbarch *gdbarch = get_frame_arch (this_frame);
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enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
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CORE_ADDR sp, ucontext_addr, addr;
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int regnum;
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gdb_byte buf[4];
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/* We find the appropriate instance of `ucontext_t' at a
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fixed offset in the signal frame. */
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sp = get_frame_register_signed (this_frame,
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MIPS_SP_REGNUM + gdbarch_num_regs (gdbarch));
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ucontext_addr = sp + N64_SIGFRAME_UCONTEXT_OFFSET;
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/* PC. */
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regnum = mips_regnum (gdbarch)->pc;
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trad_frame_set_reg_addr (cache,
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regnum + gdbarch_num_regs (gdbarch),
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ucontext_addr + N64_UCONTEXT_PC);
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/* GPRs. */
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for (regnum = MIPS_ZERO_REGNUM, addr = ucontext_addr + N64_UCONTEXT_REGS;
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regnum <= MIPS_RA_REGNUM; regnum++, addr += N64_UCONTEXT_REG_SIZE)
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trad_frame_set_reg_addr (cache,
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regnum + gdbarch_num_regs (gdbarch),
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addr);
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regnum = MIPS_PS_REGNUM;
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trad_frame_set_reg_addr (cache,
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regnum + gdbarch_num_regs (gdbarch),
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ucontext_addr + N64_UCONTEXT_SR);
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/* HI and LO. */
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regnum = mips_regnum (gdbarch)->lo;
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trad_frame_set_reg_addr (cache,
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regnum + gdbarch_num_regs (gdbarch),
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ucontext_addr + N64_UCONTEXT_LO);
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regnum = mips_regnum (gdbarch)->hi;
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trad_frame_set_reg_addr (cache,
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regnum + gdbarch_num_regs (gdbarch),
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ucontext_addr + N64_UCONTEXT_HI);
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if (target_read_memory (ucontext_addr + N64_UCONTEXT_FPUSED, buf, 4) == 0
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&& extract_unsigned_integer (buf, 4, byte_order) != 0)
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{
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for (regnum = 0, addr = ucontext_addr + N64_UCONTEXT_FPREGS;
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regnum < 32; regnum++, addr += N64_UCONTEXT_REG_SIZE)
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trad_frame_set_reg_addr (cache,
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regnum + gdbarch_fp0_regnum (gdbarch),
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addr);
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trad_frame_set_reg_addr (cache, mips_regnum (gdbarch)->fp_control_status,
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addr);
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}
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trad_frame_set_id (cache, frame_id_build (sp, func));
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}
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#define MIPS_INST_ADDIU_A0_SP_N32 (0x27a40000 \
|
|
+ N64_SIGFRAME_UCONTEXT_OFFSET)
|
|
|
|
static const struct tramp_frame mipsn32_fbsd_sigframe =
|
|
{
|
|
SIGTRAMP_FRAME,
|
|
MIPS_INSN32_SIZE,
|
|
{
|
|
{ MIPS_INST_ADDIU_A0_SP_N32, ULONGEST_MAX }, /* addiu a0, sp, SIGF_UC */
|
|
{ MIPS_INST_LI_V0_SIGRETURN, ULONGEST_MAX }, /* li v0, SYS_sigreturn */
|
|
{ MIPS_INST_SYSCALL, ULONGEST_MAX }, /* syscall */
|
|
{ MIPS_INST_BREAK, ULONGEST_MAX }, /* break */
|
|
{ TRAMP_SENTINEL_INSN, ULONGEST_MAX }
|
|
},
|
|
mips64_fbsd_sigframe_init
|
|
};
|
|
|
|
#define MIPS_INST_DADDIU_A0_SP_N64 (0x67a40000 \
|
|
+ N64_SIGFRAME_UCONTEXT_OFFSET)
|
|
|
|
static const struct tramp_frame mips64_fbsd_sigframe =
|
|
{
|
|
SIGTRAMP_FRAME,
|
|
MIPS_INSN32_SIZE,
|
|
{
|
|
{ MIPS_INST_DADDIU_A0_SP_N64, ULONGEST_MAX }, /* daddiu a0, sp, SIGF_UC */
|
|
{ MIPS_INST_LI_V0_SIGRETURN, ULONGEST_MAX }, /* li v0, SYS_sigreturn */
|
|
{ MIPS_INST_SYSCALL, ULONGEST_MAX }, /* syscall */
|
|
{ MIPS_INST_BREAK, ULONGEST_MAX }, /* break */
|
|
{ TRAMP_SENTINEL_INSN, ULONGEST_MAX }
|
|
},
|
|
mips64_fbsd_sigframe_init
|
|
};
|
|
|
|
/* Shared library support. */
|
|
|
|
/* FreeBSD/mips can use an alternate routine in the runtime linker to
|
|
resolve functions. */
|
|
|
|
static CORE_ADDR
|
|
mips_fbsd_skip_solib_resolver (struct gdbarch *gdbarch, CORE_ADDR pc)
|
|
{
|
|
struct bound_minimal_symbol msym
|
|
= lookup_bound_minimal_symbol ("_mips_rtld_bind");
|
|
if (msym.minsym != nullptr && msym.value_address () == pc)
|
|
return frame_unwind_caller_pc (get_current_frame ());
|
|
|
|
return fbsd_skip_solib_resolver (gdbarch, pc);
|
|
}
|
|
|
|
/* FreeBSD/mips uses a slightly different `struct link_map' than the
|
|
other FreeBSD platforms as it includes an additional `l_off'
|
|
member. */
|
|
|
|
static struct link_map_offsets *
|
|
mips_fbsd_ilp32_fetch_link_map_offsets (void)
|
|
{
|
|
static struct link_map_offsets lmo;
|
|
static struct link_map_offsets *lmp = NULL;
|
|
|
|
if (lmp == NULL)
|
|
{
|
|
lmp = &lmo;
|
|
|
|
lmo.r_version_offset = 0;
|
|
lmo.r_version_size = 4;
|
|
lmo.r_map_offset = 4;
|
|
lmo.r_brk_offset = 8;
|
|
lmo.r_ldsomap_offset = -1;
|
|
lmo.r_next_offset = -1;
|
|
|
|
lmo.link_map_size = 24;
|
|
lmo.l_addr_offset = 0;
|
|
lmo.l_name_offset = 8;
|
|
lmo.l_ld_offset = 12;
|
|
lmo.l_next_offset = 16;
|
|
lmo.l_prev_offset = 20;
|
|
}
|
|
|
|
return lmp;
|
|
}
|
|
|
|
static struct link_map_offsets *
|
|
mips_fbsd_lp64_fetch_link_map_offsets (void)
|
|
{
|
|
static struct link_map_offsets lmo;
|
|
static struct link_map_offsets *lmp = NULL;
|
|
|
|
if (lmp == NULL)
|
|
{
|
|
lmp = &lmo;
|
|
|
|
lmo.r_version_offset = 0;
|
|
lmo.r_version_size = 4;
|
|
lmo.r_map_offset = 8;
|
|
lmo.r_brk_offset = 16;
|
|
lmo.r_ldsomap_offset = -1;
|
|
lmo.r_next_offset = -1;
|
|
|
|
lmo.link_map_size = 48;
|
|
lmo.l_addr_offset = 0;
|
|
lmo.l_name_offset = 16;
|
|
lmo.l_ld_offset = 24;
|
|
lmo.l_next_offset = 32;
|
|
lmo.l_prev_offset = 40;
|
|
}
|
|
|
|
return lmp;
|
|
}
|
|
|
|
static void
|
|
mips_fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
|
|
{
|
|
enum mips_abi abi = mips_abi (gdbarch);
|
|
|
|
/* Generic FreeBSD support. */
|
|
fbsd_init_abi (info, gdbarch);
|
|
|
|
set_gdbarch_software_single_step (gdbarch, mips_software_single_step);
|
|
|
|
switch (abi)
|
|
{
|
|
case MIPS_ABI_O32:
|
|
tramp_frame_prepend_unwinder (gdbarch, &mips_fbsd_sigframe);
|
|
break;
|
|
case MIPS_ABI_N32:
|
|
tramp_frame_prepend_unwinder (gdbarch, &mipsn32_fbsd_sigframe);
|
|
break;
|
|
case MIPS_ABI_N64:
|
|
tramp_frame_prepend_unwinder (gdbarch, &mips64_fbsd_sigframe);
|
|
break;
|
|
}
|
|
|
|
set_gdbarch_iterate_over_regset_sections
|
|
(gdbarch, mips_fbsd_iterate_over_regset_sections);
|
|
|
|
set_gdbarch_skip_solib_resolver (gdbarch, mips_fbsd_skip_solib_resolver);
|
|
|
|
/* FreeBSD/mips has SVR4-style shared libraries. */
|
|
set_solib_svr4_fetch_link_map_offsets
|
|
(gdbarch, (gdbarch_ptr_bit (gdbarch) == 32 ?
|
|
mips_fbsd_ilp32_fetch_link_map_offsets :
|
|
mips_fbsd_lp64_fetch_link_map_offsets));
|
|
}
|
|
|
|
void _initialize_mips_fbsd_tdep ();
|
|
void
|
|
_initialize_mips_fbsd_tdep ()
|
|
{
|
|
gdbarch_register_osabi (bfd_arch_mips, 0, GDB_OSABI_FREEBSD,
|
|
mips_fbsd_init_abi);
|
|
}
|