mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-27 04:52:05 +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.
337 lines
10 KiB
C
337 lines
10 KiB
C
/* Native-dependent code for FreeBSD/amd64.
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Copyright (C) 2003-2024 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 "inferior.h"
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#include "regcache.h"
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#include "target.h"
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#include <signal.h>
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#include <sys/types.h>
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#include <sys/ptrace.h>
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#include <sys/sysctl.h>
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#include <sys/user.h>
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#include <machine/reg.h>
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#include "amd64-tdep.h"
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#include "amd64-fbsd-tdep.h"
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#include "i387-tdep.h"
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#include "amd64-nat.h"
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#include "x86-nat.h"
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#include "x86-fbsd-nat.h"
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class amd64_fbsd_nat_target final : public x86_fbsd_nat_target
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{
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public:
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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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const struct target_desc *read_description () override;
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};
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static amd64_fbsd_nat_target the_amd64_fbsd_nat_target;
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/* This is a layout of the amd64 'struct reg' but with i386
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registers. */
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static const struct regcache_map_entry amd64_fbsd32_gregmap[] =
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{
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{ 8, REGCACHE_MAP_SKIP, 8 },
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{ 1, I386_EDI_REGNUM, 8 },
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{ 1, I386_ESI_REGNUM, 8 },
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{ 1, I386_EBP_REGNUM, 8 },
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{ 1, I386_EBX_REGNUM, 8 },
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{ 1, I386_EDX_REGNUM, 8 },
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{ 1, I386_ECX_REGNUM, 8 },
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{ 1, I386_EAX_REGNUM, 8 },
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{ 1, REGCACHE_MAP_SKIP, 4 }, /* trapno */
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{ 1, I386_FS_REGNUM, 2 },
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{ 1, I386_GS_REGNUM, 2 },
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{ 1, REGCACHE_MAP_SKIP, 4 }, /* err */
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{ 1, I386_ES_REGNUM, 2 },
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{ 1, I386_DS_REGNUM, 2 },
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{ 1, I386_EIP_REGNUM, 8 },
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{ 1, I386_CS_REGNUM, 8 },
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{ 1, I386_EFLAGS_REGNUM, 8 },
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{ 1, I386_ESP_REGNUM, 0 },
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{ 1, I386_SS_REGNUM, 8 },
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{ 0 }
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};
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static const struct regset amd64_fbsd32_gregset =
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{
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amd64_fbsd32_gregmap, regcache_supply_regset, regcache_collect_regset
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};
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/* Return the regset to use for 'struct reg' for the GDBARCH. */
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static const struct regset *
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find_gregset (struct gdbarch *gdbarch)
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{
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if (gdbarch_bfd_arch_info (gdbarch)->bits_per_word == 32)
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return &amd64_fbsd32_gregset;
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else
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return &amd64_fbsd_gregset;
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}
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/* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
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for all registers. */
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void
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amd64_fbsd_nat_target::fetch_registers (struct regcache *regcache, int regnum)
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{
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struct gdbarch *gdbarch = regcache->arch ();
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#if defined(PT_GETFSBASE) || defined(PT_GETGSBASE)
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const i386_gdbarch_tdep *tdep = gdbarch_tdep<i386_gdbarch_tdep> (gdbarch);
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#endif
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pid_t pid = get_ptrace_pid (regcache->ptid ());
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const struct regset *gregset = find_gregset (gdbarch);
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if (fetch_register_set<struct reg> (regcache, regnum, PT_GETREGS, gregset))
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{
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if (regnum != -1)
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return;
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}
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#ifdef PT_GETFSBASE
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if (regnum == -1 || regnum == tdep->fsbase_regnum)
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{
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register_t base;
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if (ptrace (PT_GETFSBASE, pid, (PTRACE_TYPE_ARG3) &base, 0) == -1)
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perror_with_name (_("Couldn't get segment register fs_base"));
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regcache->raw_supply (tdep->fsbase_regnum, &base);
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if (regnum != -1)
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return;
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}
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#endif
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#ifdef PT_GETGSBASE
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if (regnum == -1 || regnum == tdep->fsbase_regnum + 1)
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{
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register_t base;
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if (ptrace (PT_GETGSBASE, pid, (PTRACE_TYPE_ARG3) &base, 0) == -1)
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perror_with_name (_("Couldn't get segment register gs_base"));
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regcache->raw_supply (tdep->fsbase_regnum + 1, &base);
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if (regnum != -1)
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return;
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}
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#endif
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/* There is no amd64_fxsave_supplies or amd64_xsave_supplies.
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Instead, the earlier register sets return early if the request
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was for a specific register that was already satisified to avoid
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fetching the FPU/XSAVE state unnecessarily. */
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#ifdef PT_GETXSTATE_INFO
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if (m_xsave_info.xsave_len != 0)
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{
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void *xstateregs = alloca (m_xsave_info.xsave_len);
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if (ptrace (PT_GETXSTATE, pid, (PTRACE_TYPE_ARG3) xstateregs, 0) == -1)
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perror_with_name (_("Couldn't get extended state status"));
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amd64_supply_xsave (regcache, regnum, xstateregs);
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return;
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}
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#endif
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struct fpreg fpregs;
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if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
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perror_with_name (_("Couldn't get floating point status"));
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amd64_supply_fxsave (regcache, regnum, &fpregs);
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}
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/* Store register REGNUM back into the inferior. If REGNUM is -1, do
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this for all registers. */
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void
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amd64_fbsd_nat_target::store_registers (struct regcache *regcache, int regnum)
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{
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struct gdbarch *gdbarch = regcache->arch ();
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#if defined(PT_GETFSBASE) || defined(PT_GETGSBASE)
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const i386_gdbarch_tdep *tdep = gdbarch_tdep<i386_gdbarch_tdep> (gdbarch);
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#endif
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pid_t pid = get_ptrace_pid (regcache->ptid ());
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const struct regset *gregset = find_gregset (gdbarch);
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if (store_register_set<struct reg> (regcache, regnum, PT_GETREGS, PT_SETREGS,
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gregset))
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{
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if (regnum != -1)
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return;
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}
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#ifdef PT_SETFSBASE
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if (regnum == -1 || regnum == tdep->fsbase_regnum)
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{
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register_t base;
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/* Clear the full base value to support 32-bit targets. */
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base = 0;
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regcache->raw_collect (tdep->fsbase_regnum, &base);
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if (ptrace (PT_SETFSBASE, pid, (PTRACE_TYPE_ARG3) &base, 0) == -1)
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perror_with_name (_("Couldn't write segment register fs_base"));
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if (regnum != -1)
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return;
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}
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#endif
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#ifdef PT_SETGSBASE
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if (regnum == -1 || regnum == tdep->fsbase_regnum + 1)
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{
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register_t base;
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/* Clear the full base value to support 32-bit targets. */
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base = 0;
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regcache->raw_collect (tdep->fsbase_regnum + 1, &base);
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if (ptrace (PT_SETGSBASE, pid, (PTRACE_TYPE_ARG3) &base, 0) == -1)
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perror_with_name (_("Couldn't write segment register gs_base"));
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if (regnum != -1)
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return;
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}
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#endif
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/* There is no amd64_fxsave_supplies or amd64_xsave_supplies.
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Instead, the earlier register sets return early if the request
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was for a specific register that was already satisified to avoid
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fetching the FPU/XSAVE state unnecessarily. */
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#ifdef PT_GETXSTATE_INFO
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if (m_xsave_info.xsave_len != 0)
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{
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void *xstateregs = alloca (m_xsave_info.xsave_len);
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if (ptrace (PT_GETXSTATE, pid, (PTRACE_TYPE_ARG3) xstateregs, 0) == -1)
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perror_with_name (_("Couldn't get extended state status"));
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amd64_collect_xsave (regcache, regnum, xstateregs, 0);
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if (ptrace (PT_SETXSTATE, pid, (PTRACE_TYPE_ARG3) xstateregs,
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m_xsave_info.xsave_len) == -1)
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perror_with_name (_("Couldn't write extended state status"));
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return;
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}
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#endif
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struct fpreg fpregs;
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if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
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perror_with_name (_("Couldn't get floating point status"));
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amd64_collect_fxsave (regcache, regnum, &fpregs);
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if (ptrace (PT_SETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
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perror_with_name (_("Couldn't write floating point status"));
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}
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/* Support for debugging kernel virtual memory images. */
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#include <machine/pcb.h>
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#include <osreldate.h>
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#include "bsd-kvm.h"
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static int
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amd64fbsd_supply_pcb (struct regcache *regcache, struct pcb *pcb)
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{
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/* The following is true for FreeBSD 5.2:
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The pcb contains %rip, %rbx, %rsp, %rbp, %r12, %r13, %r14, %r15,
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%ds, %es, %fs and %gs. This accounts for all callee-saved
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registers specified by the psABI and then some. Here %esp
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contains the stack pointer at the point just after the call to
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cpu_switch(). From this information we reconstruct the register
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state as it would like when we just returned from cpu_switch(). */
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/* The stack pointer shouldn't be zero. */
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if (pcb->pcb_rsp == 0)
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return 0;
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pcb->pcb_rsp += 8;
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regcache->raw_supply (AMD64_RIP_REGNUM, &pcb->pcb_rip);
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regcache->raw_supply (AMD64_RBX_REGNUM, &pcb->pcb_rbx);
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regcache->raw_supply (AMD64_RSP_REGNUM, &pcb->pcb_rsp);
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regcache->raw_supply (AMD64_RBP_REGNUM, &pcb->pcb_rbp);
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regcache->raw_supply (12, &pcb->pcb_r12);
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regcache->raw_supply (13, &pcb->pcb_r13);
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regcache->raw_supply (14, &pcb->pcb_r14);
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regcache->raw_supply (15, &pcb->pcb_r15);
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#if (__FreeBSD_version < 800075) && (__FreeBSD_kernel_version < 800075)
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/* struct pcb provides the pcb_ds/pcb_es/pcb_fs/pcb_gs fields only
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up until __FreeBSD_version 800074: The removal of these fields
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occurred on 2009-04-01 while the __FreeBSD_version number was
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bumped to 800075 on 2009-04-06. So 800075 is the closest version
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number where we should not try to access these fields. */
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regcache->raw_supply (AMD64_DS_REGNUM, &pcb->pcb_ds);
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regcache->raw_supply (AMD64_ES_REGNUM, &pcb->pcb_es);
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regcache->raw_supply (AMD64_FS_REGNUM, &pcb->pcb_fs);
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regcache->raw_supply (AMD64_GS_REGNUM, &pcb->pcb_gs);
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#endif
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return 1;
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}
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/* Implement the read_description method. */
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const struct target_desc *
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amd64_fbsd_nat_target::read_description ()
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{
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struct reg regs;
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int is64;
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if (inferior_ptid == null_ptid)
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return this->beneath ()->read_description ();
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if (ptrace (PT_GETREGS, inferior_ptid.pid (),
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(PTRACE_TYPE_ARG3) ®s, 0) == -1)
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perror_with_name (_("Couldn't get registers"));
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is64 = (regs.r_cs == GSEL (GUCODE_SEL, SEL_UPL));
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#ifdef PT_GETXSTATE_INFO
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probe_xsave_layout (inferior_ptid.pid ());
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if (m_xsave_info.xsave_len != 0)
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{
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if (is64)
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return amd64_target_description (m_xsave_info.xsave_mask, true);
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else
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return i386_target_description (m_xsave_info.xsave_mask, true);
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}
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#endif
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if (is64)
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return amd64_target_description (X86_XSTATE_SSE_MASK, true);
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else
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return i386_target_description (X86_XSTATE_SSE_MASK, true);
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}
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void _initialize_amd64fbsd_nat ();
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void
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_initialize_amd64fbsd_nat ()
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{
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add_inf_child_target (&the_amd64_fbsd_nat_target);
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/* Support debugging kernel virtual memory images. */
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bsd_kvm_add_target (amd64fbsd_supply_pcb);
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}
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