mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-11-23 01:53:38 +08:00
18d2988e5d
Now that defs.h, server.h and common-defs.h are included via the `-include` option, it is no longer necessary for source files to include them. Remove all the inclusions of these files I could find. Update the generation scripts where relevant. Change-Id: Ia026cff269c1b7ae7386dd3619bc9bb6a5332837 Approved-By: Pedro Alves <pedro@palves.net>
336 lines
10 KiB
C
336 lines
10 KiB
C
/* Native-dependent code for FreeBSD/amd64.
|
||
|
||
Copyright (C) 2003-2024 Free Software Foundation, Inc.
|
||
|
||
This file is part of GDB.
|
||
|
||
This program is free software; you can redistribute it and/or modify
|
||
it under the terms of the GNU General Public License as published by
|
||
the Free Software Foundation; either version 3 of the License, or
|
||
(at your option) any later version.
|
||
|
||
This program is distributed in the hope that it will be useful,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
GNU General Public License for more details.
|
||
|
||
You should have received a copy of the GNU General Public License
|
||
along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
||
|
||
#include "inferior.h"
|
||
#include "regcache.h"
|
||
#include "target.h"
|
||
|
||
#include <signal.h>
|
||
#include <sys/types.h>
|
||
#include <sys/ptrace.h>
|
||
#include <sys/sysctl.h>
|
||
#include <sys/user.h>
|
||
#include <machine/reg.h>
|
||
|
||
#include "amd64-tdep.h"
|
||
#include "amd64-fbsd-tdep.h"
|
||
#include "i387-tdep.h"
|
||
#include "amd64-nat.h"
|
||
#include "x86-nat.h"
|
||
#include "x86-fbsd-nat.h"
|
||
|
||
class amd64_fbsd_nat_target final : public x86_fbsd_nat_target
|
||
{
|
||
public:
|
||
void fetch_registers (struct regcache *, int) override;
|
||
void store_registers (struct regcache *, int) override;
|
||
|
||
const struct target_desc *read_description () override;
|
||
};
|
||
|
||
static amd64_fbsd_nat_target the_amd64_fbsd_nat_target;
|
||
|
||
/* This is a layout of the amd64 'struct reg' but with i386
|
||
registers. */
|
||
|
||
static const struct regcache_map_entry amd64_fbsd32_gregmap[] =
|
||
{
|
||
{ 8, REGCACHE_MAP_SKIP, 8 },
|
||
{ 1, I386_EDI_REGNUM, 8 },
|
||
{ 1, I386_ESI_REGNUM, 8 },
|
||
{ 1, I386_EBP_REGNUM, 8 },
|
||
{ 1, I386_EBX_REGNUM, 8 },
|
||
{ 1, I386_EDX_REGNUM, 8 },
|
||
{ 1, I386_ECX_REGNUM, 8 },
|
||
{ 1, I386_EAX_REGNUM, 8 },
|
||
{ 1, REGCACHE_MAP_SKIP, 4 }, /* trapno */
|
||
{ 1, I386_FS_REGNUM, 2 },
|
||
{ 1, I386_GS_REGNUM, 2 },
|
||
{ 1, REGCACHE_MAP_SKIP, 4 }, /* err */
|
||
{ 1, I386_ES_REGNUM, 2 },
|
||
{ 1, I386_DS_REGNUM, 2 },
|
||
{ 1, I386_EIP_REGNUM, 8 },
|
||
{ 1, I386_CS_REGNUM, 8 },
|
||
{ 1, I386_EFLAGS_REGNUM, 8 },
|
||
{ 1, I386_ESP_REGNUM, 0 },
|
||
{ 1, I386_SS_REGNUM, 8 },
|
||
{ 0 }
|
||
};
|
||
|
||
static const struct regset amd64_fbsd32_gregset =
|
||
{
|
||
amd64_fbsd32_gregmap, regcache_supply_regset, regcache_collect_regset
|
||
};
|
||
|
||
/* Return the regset to use for 'struct reg' for the GDBARCH. */
|
||
|
||
static const struct regset *
|
||
find_gregset (struct gdbarch *gdbarch)
|
||
{
|
||
if (gdbarch_bfd_arch_info (gdbarch)->bits_per_word == 32)
|
||
return &amd64_fbsd32_gregset;
|
||
else
|
||
return &amd64_fbsd_gregset;
|
||
}
|
||
|
||
/* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
|
||
for all registers. */
|
||
|
||
void
|
||
amd64_fbsd_nat_target::fetch_registers (struct regcache *regcache, int regnum)
|
||
{
|
||
struct gdbarch *gdbarch = regcache->arch ();
|
||
#if defined(PT_GETFSBASE) || defined(PT_GETGSBASE)
|
||
const i386_gdbarch_tdep *tdep = gdbarch_tdep<i386_gdbarch_tdep> (gdbarch);
|
||
#endif
|
||
pid_t pid = get_ptrace_pid (regcache->ptid ());
|
||
const struct regset *gregset = find_gregset (gdbarch);
|
||
|
||
if (fetch_register_set<struct reg> (regcache, regnum, PT_GETREGS, gregset))
|
||
{
|
||
if (regnum != -1)
|
||
return;
|
||
}
|
||
|
||
#ifdef PT_GETFSBASE
|
||
if (regnum == -1 || regnum == tdep->fsbase_regnum)
|
||
{
|
||
register_t base;
|
||
|
||
if (ptrace (PT_GETFSBASE, pid, (PTRACE_TYPE_ARG3) &base, 0) == -1)
|
||
perror_with_name (_("Couldn't get segment register fs_base"));
|
||
|
||
regcache->raw_supply (tdep->fsbase_regnum, &base);
|
||
if (regnum != -1)
|
||
return;
|
||
}
|
||
#endif
|
||
#ifdef PT_GETGSBASE
|
||
if (regnum == -1 || regnum == tdep->fsbase_regnum + 1)
|
||
{
|
||
register_t base;
|
||
|
||
if (ptrace (PT_GETGSBASE, pid, (PTRACE_TYPE_ARG3) &base, 0) == -1)
|
||
perror_with_name (_("Couldn't get segment register gs_base"));
|
||
|
||
regcache->raw_supply (tdep->fsbase_regnum + 1, &base);
|
||
if (regnum != -1)
|
||
return;
|
||
}
|
||
#endif
|
||
|
||
/* There is no amd64_fxsave_supplies or amd64_xsave_supplies.
|
||
Instead, the earlier register sets return early if the request
|
||
was for a specific register that was already satisified to avoid
|
||
fetching the FPU/XSAVE state unnecessarily. */
|
||
|
||
#ifdef PT_GETXSTATE_INFO
|
||
if (m_xsave_info.xsave_len != 0)
|
||
{
|
||
void *xstateregs = alloca (m_xsave_info.xsave_len);
|
||
|
||
if (ptrace (PT_GETXSTATE, pid, (PTRACE_TYPE_ARG3) xstateregs, 0) == -1)
|
||
perror_with_name (_("Couldn't get extended state status"));
|
||
|
||
amd64_supply_xsave (regcache, regnum, xstateregs);
|
||
return;
|
||
}
|
||
#endif
|
||
|
||
struct fpreg fpregs;
|
||
|
||
if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
|
||
perror_with_name (_("Couldn't get floating point status"));
|
||
|
||
amd64_supply_fxsave (regcache, regnum, &fpregs);
|
||
}
|
||
|
||
/* Store register REGNUM back into the inferior. If REGNUM is -1, do
|
||
this for all registers. */
|
||
|
||
void
|
||
amd64_fbsd_nat_target::store_registers (struct regcache *regcache, int regnum)
|
||
{
|
||
struct gdbarch *gdbarch = regcache->arch ();
|
||
#if defined(PT_GETFSBASE) || defined(PT_GETGSBASE)
|
||
const i386_gdbarch_tdep *tdep = gdbarch_tdep<i386_gdbarch_tdep> (gdbarch);
|
||
#endif
|
||
pid_t pid = get_ptrace_pid (regcache->ptid ());
|
||
const struct regset *gregset = find_gregset (gdbarch);
|
||
|
||
if (store_register_set<struct reg> (regcache, regnum, PT_GETREGS, PT_SETREGS,
|
||
gregset))
|
||
{
|
||
if (regnum != -1)
|
||
return;
|
||
}
|
||
|
||
#ifdef PT_SETFSBASE
|
||
if (regnum == -1 || regnum == tdep->fsbase_regnum)
|
||
{
|
||
register_t base;
|
||
|
||
/* Clear the full base value to support 32-bit targets. */
|
||
base = 0;
|
||
regcache->raw_collect (tdep->fsbase_regnum, &base);
|
||
|
||
if (ptrace (PT_SETFSBASE, pid, (PTRACE_TYPE_ARG3) &base, 0) == -1)
|
||
perror_with_name (_("Couldn't write segment register fs_base"));
|
||
if (regnum != -1)
|
||
return;
|
||
}
|
||
#endif
|
||
#ifdef PT_SETGSBASE
|
||
if (regnum == -1 || regnum == tdep->fsbase_regnum + 1)
|
||
{
|
||
register_t base;
|
||
|
||
/* Clear the full base value to support 32-bit targets. */
|
||
base = 0;
|
||
regcache->raw_collect (tdep->fsbase_regnum + 1, &base);
|
||
|
||
if (ptrace (PT_SETGSBASE, pid, (PTRACE_TYPE_ARG3) &base, 0) == -1)
|
||
perror_with_name (_("Couldn't write segment register gs_base"));
|
||
if (regnum != -1)
|
||
return;
|
||
}
|
||
#endif
|
||
|
||
/* There is no amd64_fxsave_supplies or amd64_xsave_supplies.
|
||
Instead, the earlier register sets return early if the request
|
||
was for a specific register that was already satisified to avoid
|
||
fetching the FPU/XSAVE state unnecessarily. */
|
||
|
||
#ifdef PT_GETXSTATE_INFO
|
||
if (m_xsave_info.xsave_len != 0)
|
||
{
|
||
void *xstateregs = alloca (m_xsave_info.xsave_len);
|
||
|
||
if (ptrace (PT_GETXSTATE, pid, (PTRACE_TYPE_ARG3) xstateregs, 0) == -1)
|
||
perror_with_name (_("Couldn't get extended state status"));
|
||
|
||
amd64_collect_xsave (regcache, regnum, xstateregs, 0);
|
||
|
||
if (ptrace (PT_SETXSTATE, pid, (PTRACE_TYPE_ARG3) xstateregs,
|
||
m_xsave_info.xsave_len) == -1)
|
||
perror_with_name (_("Couldn't write extended state status"));
|
||
return;
|
||
}
|
||
#endif
|
||
|
||
struct fpreg fpregs;
|
||
|
||
if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
|
||
perror_with_name (_("Couldn't get floating point status"));
|
||
|
||
amd64_collect_fxsave (regcache, regnum, &fpregs);
|
||
|
||
if (ptrace (PT_SETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
|
||
perror_with_name (_("Couldn't write floating point status"));
|
||
}
|
||
|
||
/* Support for debugging kernel virtual memory images. */
|
||
|
||
#include <machine/pcb.h>
|
||
#include <osreldate.h>
|
||
|
||
#include "bsd-kvm.h"
|
||
|
||
static int
|
||
amd64fbsd_supply_pcb (struct regcache *regcache, struct pcb *pcb)
|
||
{
|
||
/* The following is true for FreeBSD 5.2:
|
||
|
||
The pcb contains %rip, %rbx, %rsp, %rbp, %r12, %r13, %r14, %r15,
|
||
%ds, %es, %fs and %gs. This accounts for all callee-saved
|
||
registers specified by the psABI and then some. Here %esp
|
||
contains the stack pointer at the point just after the call to
|
||
cpu_switch(). From this information we reconstruct the register
|
||
state as it would like when we just returned from cpu_switch(). */
|
||
|
||
/* The stack pointer shouldn't be zero. */
|
||
if (pcb->pcb_rsp == 0)
|
||
return 0;
|
||
|
||
pcb->pcb_rsp += 8;
|
||
regcache->raw_supply (AMD64_RIP_REGNUM, &pcb->pcb_rip);
|
||
regcache->raw_supply (AMD64_RBX_REGNUM, &pcb->pcb_rbx);
|
||
regcache->raw_supply (AMD64_RSP_REGNUM, &pcb->pcb_rsp);
|
||
regcache->raw_supply (AMD64_RBP_REGNUM, &pcb->pcb_rbp);
|
||
regcache->raw_supply (12, &pcb->pcb_r12);
|
||
regcache->raw_supply (13, &pcb->pcb_r13);
|
||
regcache->raw_supply (14, &pcb->pcb_r14);
|
||
regcache->raw_supply (15, &pcb->pcb_r15);
|
||
#if (__FreeBSD_version < 800075) && (__FreeBSD_kernel_version < 800075)
|
||
/* struct pcb provides the pcb_ds/pcb_es/pcb_fs/pcb_gs fields only
|
||
up until __FreeBSD_version 800074: The removal of these fields
|
||
occurred on 2009-04-01 while the __FreeBSD_version number was
|
||
bumped to 800075 on 2009-04-06. So 800075 is the closest version
|
||
number where we should not try to access these fields. */
|
||
regcache->raw_supply (AMD64_DS_REGNUM, &pcb->pcb_ds);
|
||
regcache->raw_supply (AMD64_ES_REGNUM, &pcb->pcb_es);
|
||
regcache->raw_supply (AMD64_FS_REGNUM, &pcb->pcb_fs);
|
||
regcache->raw_supply (AMD64_GS_REGNUM, &pcb->pcb_gs);
|
||
#endif
|
||
|
||
return 1;
|
||
}
|
||
|
||
|
||
/* Implement the read_description method. */
|
||
|
||
const struct target_desc *
|
||
amd64_fbsd_nat_target::read_description ()
|
||
{
|
||
struct reg regs;
|
||
int is64;
|
||
|
||
if (inferior_ptid == null_ptid)
|
||
return this->beneath ()->read_description ();
|
||
|
||
if (ptrace (PT_GETREGS, inferior_ptid.pid (),
|
||
(PTRACE_TYPE_ARG3) ®s, 0) == -1)
|
||
perror_with_name (_("Couldn't get registers"));
|
||
is64 = (regs.r_cs == GSEL (GUCODE_SEL, SEL_UPL));
|
||
#ifdef PT_GETXSTATE_INFO
|
||
probe_xsave_layout (inferior_ptid.pid ());
|
||
if (m_xsave_info.xsave_len != 0)
|
||
{
|
||
if (is64)
|
||
return amd64_target_description (m_xsave_info.xsave_mask, true);
|
||
else
|
||
return i386_target_description (m_xsave_info.xsave_mask, true);
|
||
}
|
||
#endif
|
||
if (is64)
|
||
return amd64_target_description (X86_XSTATE_SSE_MASK, true);
|
||
else
|
||
return i386_target_description (X86_XSTATE_SSE_MASK, true);
|
||
}
|
||
|
||
void _initialize_amd64fbsd_nat ();
|
||
void
|
||
_initialize_amd64fbsd_nat ()
|
||
{
|
||
add_inf_child_target (&the_amd64_fbsd_nat_target);
|
||
|
||
/* Support debugging kernel virtual memory images. */
|
||
bsd_kvm_add_target (amd64fbsd_supply_pcb);
|
||
}
|