/* Native-dependent code for GNU/Linux x86-64.
- Copyright (C) 2001-2017 Free Software Foundation, Inc.
+ Copyright (C) 2001-2018 Free Software Foundation, Inc.
Contributed by Jiri Smid, SuSE Labs.
This file is part of GDB.
#include "nat/linux-ptrace.h"
#include "nat/amd64-linux-siginfo.h"
+/* This definition comes from prctl.h. Kernels older than 2.5.64
+ do not have it. */
+#ifndef PTRACE_ARCH_PRCTL
+#define PTRACE_ARCH_PRCTL 30
+#endif
+
/* Mapping between the general-purpose registers in GNU/Linux x86-64
`struct user' format and GDB's register cache layout for GNU/Linux
i386.
-1, -1, /* MPX registers BNDCFGU, BNDSTATUS. */
-1, -1, -1, -1, -1, -1, -1, -1, /* k0 ... k7 (AVX512) */
-1, -1, -1, -1, -1, -1, -1, -1, /* zmm0 ... zmm7 (AVX512) */
+ -1, /* PKEYS register PKRU */
ORIG_RAX * 8 /* "orig_eax" */
};
\f
amd64_linux_fetch_inferior_registers (struct target_ops *ops,
struct regcache *regcache, int regnum)
{
- struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ struct gdbarch *gdbarch = regcache->arch ();
int tid;
/* GNU/Linux LWP ID's are process ID's. */
- tid = ptid_get_lwp (inferior_ptid);
+ tid = ptid_get_lwp (regcache_get_ptid (regcache));
if (tid == 0)
- tid = ptid_get_pid (inferior_ptid); /* Not a threaded program. */
+ tid = ptid_get_pid (regcache_get_ptid (regcache)); /* Not a threaded program. */
if (regnum == -1 || amd64_native_gregset_supplies_p (gdbarch, regnum))
{
amd64_supply_fxsave (regcache, -1, &fpregs);
}
+#ifndef HAVE_STRUCT_USER_REGS_STRUCT_FS_BASE
+ {
+ /* PTRACE_ARCH_PRCTL is obsolete since 2.6.25, where the
+ fs_base and gs_base fields of user_regs_struct can be
+ used directly. */
+ unsigned long base;
+
+ if (regnum == -1 || regnum == AMD64_FSBASE_REGNUM)
+ {
+ if (ptrace (PTRACE_ARCH_PRCTL, tid, &base, ARCH_GET_FS) < 0)
+ perror_with_name (_("Couldn't get segment register fs_base"));
+
+ regcache_raw_supply (regcache, AMD64_FSBASE_REGNUM, &base);
+ }
+
+ if (regnum == -1 || regnum == AMD64_GSBASE_REGNUM)
+ {
+ if (ptrace (PTRACE_ARCH_PRCTL, tid, &base, ARCH_GET_GS) < 0)
+ perror_with_name (_("Couldn't get segment register gs_base"));
+
+ regcache_raw_supply (regcache, AMD64_GSBASE_REGNUM, &base);
+ }
+ }
+#endif
}
}
amd64_linux_store_inferior_registers (struct target_ops *ops,
struct regcache *regcache, int regnum)
{
- struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ struct gdbarch *gdbarch = regcache->arch ();
int tid;
/* GNU/Linux LWP ID's are process ID's. */
- tid = ptid_get_lwp (inferior_ptid);
+ tid = ptid_get_lwp (regcache_get_ptid (regcache));
if (tid == 0)
- tid = ptid_get_pid (inferior_ptid); /* Not a threaded program. */
+ tid = ptid_get_pid (regcache_get_ptid (regcache)); /* Not a threaded program. */
if (regnum == -1 || amd64_native_gregset_supplies_p (gdbarch, regnum))
{
if (ptrace (PTRACE_SETFPREGS, tid, 0, (long) &fpregs) < 0)
perror_with_name (_("Couldn't write floating point status"));
}
+
+#ifndef HAVE_STRUCT_USER_REGS_STRUCT_FS_BASE
+ {
+ /* PTRACE_ARCH_PRCTL is obsolete since 2.6.25, where the
+ fs_base and gs_base fields of user_regs_struct can be
+ used directly. */
+ void *base;
+
+ if (regnum == -1 || regnum == AMD64_FSBASE_REGNUM)
+ {
+ regcache_raw_collect (regcache, AMD64_FSBASE_REGNUM, &base);
+
+ if (ptrace (PTRACE_ARCH_PRCTL, tid, base, ARCH_SET_FS) < 0)
+ perror_with_name (_("Couldn't write segment register fs_base"));
+ }
+ if (regnum == -1 || regnum == AMD64_GSBASE_REGNUM)
+ {
+
+ regcache_raw_collect (regcache, AMD64_GSBASE_REGNUM, &base);
+ if (ptrace (PTRACE_ARCH_PRCTL, tid, base, ARCH_SET_GS) < 0)
+ perror_with_name (_("Couldn't write segment register gs_base"));
+ }
+ }
+#endif
}
}
\f
}
else
{
- /* This definition comes from prctl.h, but some kernels may not
- have it. */
-#ifndef PTRACE_ARCH_PRCTL
-#define PTRACE_ARCH_PRCTL 30
-#endif
+
/* FIXME: ezannoni-2003-07-09 see comment above about include
file order. We could be getting bogus values for these two. */
gdb_assert (FS < ELF_NGREG);
return 0;
}
-/* Provide a prototype to silence -Wmissing-prototypes. */
-void _initialize_amd64_linux_nat (void);
-
void
_initialize_amd64_linux_nat (void)
{