X-Git-Url: http://drtracing.org/?a=blobdiff_plain;ds=sidebyside;f=gdb%2Famd64-linux-nat.c;h=391a646992b55967b7203399099da7010ea3d5ca;hb=b8162e5ac9e052b2a88912b729081600972e854c;hp=ec0bfb9281206c99953ee10e2f16de61fc82e93c;hpb=50d71875b9128a5782b62998a6a5948f72f5eb93;p=deliverable%2Fbinutils-gdb.git
diff --git a/gdb/amd64-linux-nat.c b/gdb/amd64-linux-nat.c
index ec0bfb9281..391a646992 100644
--- a/gdb/amd64-linux-nat.c
+++ b/gdb/amd64-linux-nat.c
@@ -1,13 +1,13 @@
/* Native-dependent code for GNU/Linux x86-64.
- Copyright 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
+ Copyright (C) 2001-2016 Free Software Foundation, Inc.
Contributed by Jiri Smid, SuSE Labs.
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 2 of the License, or
+ 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,
@@ -16,61 +16,29 @@
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, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ along with this program. If not, see . */
#include "defs.h"
#include "inferior.h"
-#include "gdbcore.h"
#include "regcache.h"
-#include "linux-nat.h"
-
-#include "gdb_assert.h"
-#include "gdb_string.h"
-#include
-#include
-#include
-#include
+#include "elf/common.h"
+#include
+#include "nat/gdb_ptrace.h"
#include
-/* FIXME ezannoni-2003-07-09: we need to be included after
- because the latter redefines FS and GS for no apparent
- reason, and those definitions don't match the ones that libpthread_db
- uses, which come from . */
-/* ezannoni-2003-07-09: I think this is fixed. The extraneous defs have
- been removed from ptrace.h in the kernel. However, better safe than
- sorry. */
-#include
#include
-#include "gdb_proc_service.h"
-
-/* Prototypes for supply_gregset etc. */
#include "gregset.h"
+#include "gdb_proc_service.h"
+#include "amd64-nat.h"
+#include "linux-nat.h"
#include "amd64-tdep.h"
#include "amd64-linux-tdep.h"
#include "i386-linux-tdep.h"
-#include "amd64-nat.h"
+#include "x86-xstate.h"
-/* Mapping between the general-purpose registers in GNU/Linux x86-64
- `struct user' format and GDB's register cache layout. */
-
-static int amd64_linux_gregset64_reg_offset[] =
-{
- RAX * 8, RBX * 8, /* %rax, %rbx */
- RCX * 8, RDX * 8, /* %rcx, %rdx */
- RSI * 8, RDI * 8, /* %rsi, %rdi */
- RBP * 8, RSP * 8, /* %rbp, %rsp */
- R8 * 8, R9 * 8, /* %r8 ... */
- R10 * 8, R11 * 8,
- R12 * 8, R13 * 8,
- R14 * 8, R15 * 8, /* ... %r15 */
- RIP * 8, EFLAGS * 8, /* %rip, %eflags */
- CS * 8, SS * 8, /* %cs, %ss */
- DS * 8, ES * 8, /* %ds, %es */
- FS * 8, GS * 8 /* %fs, %gs */
-};
-
+#include "x86-linux-nat.h"
+#include "nat/linux-ptrace.h"
+#include "nat/amd64-linux-siginfo.h"
/* Mapping between the general-purpose registers in GNU/Linux x86-64
`struct user' format and GDB's register cache layout for GNU/Linux
@@ -94,14 +62,13 @@ static int amd64_linux_gregset32_reg_offset[] =
-1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1,
- ORIG_RAX * 8 /* "orig_eax" */
+ -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, /* MPX registers BND0 ... BND3. */
+ -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) */
+ ORIG_RAX * 8 /* "orig_eax" */
};
-
-/* Which ptrace request retrieves which registers?
- These apply to the corresponding SET requests as well. */
-
-#define GETFPREGS_SUPPLIES(regno) \
- (FP0_REGNUM <= (regno) && (regno) <= MXCSR_REGNUM)
/* Transfering the general-purpose registers between GDB, inferiors
@@ -111,9 +78,9 @@ static int amd64_linux_gregset32_reg_offset[] =
in *GREGSETP. */
void
-supply_gregset (elf_gregset_t *gregsetp)
+supply_gregset (struct regcache *regcache, const elf_gregset_t *gregsetp)
{
- amd64_supply_native_gregset (current_regcache, gregsetp, -1);
+ amd64_supply_native_gregset (regcache, gregsetp, -1);
}
/* Fill register REGNUM (if it is a general-purpose register) in
@@ -121,52 +88,21 @@ supply_gregset (elf_gregset_t *gregsetp)
do this for all registers. */
void
-fill_gregset (elf_gregset_t *gregsetp, int regnum)
+fill_gregset (const struct regcache *regcache,
+ elf_gregset_t *gregsetp, int regnum)
{
- amd64_collect_native_gregset (current_regcache, gregsetp, regnum);
+ amd64_collect_native_gregset (regcache, gregsetp, regnum);
}
-/* Fetch all general-purpose registers from process/thread TID and
- store their values in GDB's register cache. */
-
-static void
-fetch_regs (int tid)
-{
- elf_gregset_t regs;
-
- if (ptrace (PTRACE_GETREGS, tid, 0, (long) ®s) < 0)
- perror_with_name ("Couldn't get registers");
-
- supply_gregset (®s);
-}
-
-/* Store all valid general-purpose registers in GDB's register cache
- into the process/thread specified by TID. */
-
-static void
-store_regs (int tid, int regnum)
-{
- elf_gregset_t regs;
-
- if (ptrace (PTRACE_GETREGS, tid, 0, (long) ®s) < 0)
- perror_with_name ("Couldn't get registers");
-
- fill_gregset (®s, regnum);
-
- if (ptrace (PTRACE_SETREGS, tid, 0, (long) ®s) < 0)
- perror_with_name ("Couldn't write registers");
-}
-
-
/* Transfering floating-point registers between GDB, inferiors and cores. */
/* Fill GDB's register cache with the floating-point and SSE register
values in *FPREGSETP. */
void
-supply_fpregset (elf_fpregset_t *fpregsetp)
+supply_fpregset (struct regcache *regcache, const elf_fpregset_t *fpregsetp)
{
- amd64_supply_fxsave (current_regcache, -1, fpregsetp);
+ amd64_supply_fxsave (regcache, -1, fpregsetp);
}
/* Fill register REGNUM (if it is a floating-point or SSE register) in
@@ -174,40 +110,10 @@ supply_fpregset (elf_fpregset_t *fpregsetp)
-1, do this for all registers. */
void
-fill_fpregset (elf_fpregset_t *fpregsetp, int regnum)
+fill_fpregset (const struct regcache *regcache,
+ elf_fpregset_t *fpregsetp, int regnum)
{
- amd64_fill_fxsave ((char *) fpregsetp, regnum);
-}
-
-/* Fetch all floating-point registers from process/thread TID and store
- thier values in GDB's register cache. */
-
-static void
-fetch_fpregs (int tid)
-{
- elf_fpregset_t fpregs;
-
- if (ptrace (PTRACE_GETFPREGS, tid, 0, (long) &fpregs) < 0)
- perror_with_name ("Couldn't get floating point status");
-
- supply_fpregset (&fpregs);
-}
-
-/* Store all valid floating-point registers in GDB's register cache
- into the process/thread specified by TID. */
-
-static void
-store_fpregs (int tid, int regnum)
-{
- elf_fpregset_t fpregs;
-
- if (ptrace (PTRACE_GETFPREGS, tid, 0, (long) &fpregs) < 0)
- perror_with_name ("Couldn't get floating point status");
-
- fill_fpregset (&fpregs, regnum);
-
- if (ptrace (PTRACE_SETFPREGS, tid, 0, (long) &fpregs) < 0)
- perror_with_name ("Couldn't write floating point status");
+ amd64_collect_fxsave (regcache, regnum, fpregsetp);
}
@@ -217,136 +123,121 @@ store_fpregs (int tid, int regnum)
this for all registers (including the floating point and SSE
registers). */
-void
-fetch_inferior_registers (int regnum)
+static void
+amd64_linux_fetch_inferior_registers (struct target_ops *ops,
+ struct regcache *regcache, int regnum)
{
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
int tid;
/* GNU/Linux LWP ID's are process ID's. */
- tid = TIDGET (inferior_ptid);
+ tid = ptid_get_lwp (inferior_ptid);
if (tid == 0)
- tid = PIDGET (inferior_ptid); /* Not a threaded program. */
+ tid = ptid_get_pid (inferior_ptid); /* Not a threaded program. */
- if (regnum == -1 || amd64_native_gregset_supplies_p (regnum))
+ if (regnum == -1 || amd64_native_gregset_supplies_p (gdbarch, regnum))
{
- fetch_regs (tid);
+ elf_gregset_t regs;
+
+ if (ptrace (PTRACE_GETREGS, tid, 0, (long) ®s) < 0)
+ perror_with_name (_("Couldn't get registers"));
+
+ amd64_supply_native_gregset (regcache, ®s, -1);
if (regnum != -1)
return;
}
- if (regnum == -1 || GETFPREGS_SUPPLIES (regnum))
+ if (regnum == -1 || !amd64_native_gregset_supplies_p (gdbarch, regnum))
{
- fetch_fpregs (tid);
- return;
- }
+ elf_fpregset_t fpregs;
+
+ if (have_ptrace_getregset == TRIBOOL_TRUE)
+ {
+ char xstateregs[X86_XSTATE_MAX_SIZE];
+ struct iovec iov;
- internal_error (__FILE__, __LINE__,
- "Got request for bad register number %d.", regnum);
+ iov.iov_base = xstateregs;
+ iov.iov_len = sizeof (xstateregs);
+ if (ptrace (PTRACE_GETREGSET, tid,
+ (unsigned int) NT_X86_XSTATE, (long) &iov) < 0)
+ perror_with_name (_("Couldn't get extended state status"));
+
+ amd64_supply_xsave (regcache, -1, xstateregs);
+ }
+ else
+ {
+ if (ptrace (PTRACE_GETFPREGS, tid, 0, (long) &fpregs) < 0)
+ perror_with_name (_("Couldn't get floating point status"));
+
+ amd64_supply_fxsave (regcache, -1, &fpregs);
+ }
+ }
}
/* Store register REGNUM back into the child process. If REGNUM is
-1, do this for all registers (including the floating-point and SSE
registers). */
-void
-store_inferior_registers (int regnum)
+static void
+amd64_linux_store_inferior_registers (struct target_ops *ops,
+ struct regcache *regcache, int regnum)
{
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
int tid;
/* GNU/Linux LWP ID's are process ID's. */
- tid = TIDGET (inferior_ptid);
+ tid = ptid_get_lwp (inferior_ptid);
if (tid == 0)
- tid = PIDGET (inferior_ptid); /* Not a threaded program. */
+ tid = ptid_get_pid (inferior_ptid); /* Not a threaded program. */
- if (regnum == -1 || amd64_native_gregset_supplies_p (regnum))
+ if (regnum == -1 || amd64_native_gregset_supplies_p (gdbarch, regnum))
{
- store_regs (tid, regnum);
- if (regnum != -1)
- return;
- }
+ elf_gregset_t regs;
- if (regnum == -1 || GETFPREGS_SUPPLIES (regnum))
- {
- store_fpregs (tid, regnum);
- return;
- }
+ if (ptrace (PTRACE_GETREGS, tid, 0, (long) ®s) < 0)
+ perror_with_name (_("Couldn't get registers"));
- internal_error (__FILE__, __LINE__,
- "Got request to store bad register number %d.", regnum);
-}
-
+ amd64_collect_native_gregset (regcache, ®s, regnum);
-static unsigned long
-amd64_linux_dr_get (int regnum)
-{
- int tid;
- unsigned long value;
-
- /* FIXME: kettenis/2001-01-29: It's not clear what we should do with
- multi-threaded processes here. For now, pretend there is just
- one thread. */
- tid = PIDGET (inferior_ptid);
-
- /* FIXME: kettenis/2001-03-27: Calling perror_with_name if the
- ptrace call fails breaks debugging remote targets. The correct
- way to fix this is to add the hardware breakpoint and watchpoint
- stuff to the target vectore. For now, just return zero if the
- ptrace call fails. */
- errno = 0;
- value = ptrace (PT_READ_U, tid,
- offsetof (struct user, u_debugreg[regnum]), 0);
- if (errno != 0)
-#if 0
- perror_with_name ("Couldn't read debug register");
-#else
- return 0;
-#endif
-
- return value;
-}
-
-static void
-amd64_linux_dr_set (int regnum, unsigned long value)
-{
- int tid;
+ if (ptrace (PTRACE_SETREGS, tid, 0, (long) ®s) < 0)
+ perror_with_name (_("Couldn't write registers"));
- /* FIXME: kettenis/2001-01-29: It's not clear what we should do with
- multi-threaded processes here. For now, pretend there is just
- one thread. */
- tid = PIDGET (inferior_ptid);
+ if (regnum != -1)
+ return;
+ }
- errno = 0;
- ptrace (PT_WRITE_U, tid, offsetof (struct user, u_debugreg[regnum]), value);
- if (errno != 0)
- perror_with_name ("Couldn't write debug register");
-}
+ if (regnum == -1 || !amd64_native_gregset_supplies_p (gdbarch, regnum))
+ {
+ elf_fpregset_t fpregs;
-void
-amd64_linux_dr_set_control (unsigned long control)
-{
- amd64_linux_dr_set (DR_CONTROL, control);
-}
+ if (have_ptrace_getregset == TRIBOOL_TRUE)
+ {
+ char xstateregs[X86_XSTATE_MAX_SIZE];
+ struct iovec iov;
-void
-amd64_linux_dr_set_addr (int regnum, CORE_ADDR addr)
-{
- gdb_assert (regnum >= 0 && regnum <= DR_LASTADDR - DR_FIRSTADDR);
+ iov.iov_base = xstateregs;
+ iov.iov_len = sizeof (xstateregs);
+ if (ptrace (PTRACE_GETREGSET, tid,
+ (unsigned int) NT_X86_XSTATE, (long) &iov) < 0)
+ perror_with_name (_("Couldn't get extended state status"));
- amd64_linux_dr_set (DR_FIRSTADDR + regnum, addr);
-}
+ amd64_collect_xsave (regcache, regnum, xstateregs, 0);
-void
-amd64_linux_dr_reset_addr (int regnum)
-{
- gdb_assert (regnum >= 0 && regnum <= DR_LASTADDR - DR_FIRSTADDR);
+ if (ptrace (PTRACE_SETREGSET, tid,
+ (unsigned int) NT_X86_XSTATE, (long) &iov) < 0)
+ perror_with_name (_("Couldn't write extended state status"));
+ }
+ else
+ {
+ if (ptrace (PTRACE_GETFPREGS, tid, 0, (long) &fpregs) < 0)
+ perror_with_name (_("Couldn't get floating point status"));
- amd64_linux_dr_set (DR_FIRSTADDR + regnum, 0L);
-}
+ amd64_collect_fxsave (regcache, regnum, &fpregs);
-unsigned long
-amd64_linux_dr_get_status (void)
-{
- return amd64_linux_dr_get (DR_STATUS);
+ if (ptrace (PTRACE_SETFPREGS, tid, 0, (long) &fpregs) < 0)
+ perror_with_name (_("Couldn't write floating point status"));
+ }
+ }
}
@@ -357,28 +248,20 @@ ps_err_e
ps_get_thread_area (const struct ps_prochandle *ph,
lwpid_t lwpid, int idx, void **base)
{
- if (gdbarch_ptr_bit (current_gdbarch) == 32)
+ if (gdbarch_bfd_arch_info (target_gdbarch ())->bits_per_word == 32)
{
- /* The full structure is found in . The second
- integer is the LDT's base_address and that is used to locate
- the thread's local storage. See i386-linux-nat.c more
- info. */
- unsigned int desc[4];
-
- /* This code assumes that "int" is 32 bits and that
- GET_THREAD_AREA returns no more than 4 int values. */
- gdb_assert (sizeof (int) == 4);
-#ifndef PTRACE_GET_THREAD_AREA
-#define PTRACE_GET_THREAD_AREA 25
-#endif
- if (ptrace (PTRACE_GET_THREAD_AREA,
- lwpid, (void *) (long) idx, (unsigned long) &desc) < 0)
- return PS_ERR;
-
- /* Extend the value to 64 bits. Here it's assumed that a "long"
- and a "void *" are the same. */
- (*base) = (void *) (long) desc[1];
- return PS_OK;
+ unsigned int base_addr;
+ ps_err_e result;
+
+ result = x86_linux_get_thread_area (lwpid, (void *) (long) idx,
+ &base_addr);
+ if (result == PS_OK)
+ {
+ /* Extend the value to 64 bits. Here it's assumed that
+ a "long" and a "void *" are the same. */
+ (*base) = (void *) (long) base_addr;
+ }
+ return result;
}
else
{
@@ -394,10 +277,39 @@ ps_get_thread_area (const struct ps_prochandle *ph,
switch (idx)
{
case FS:
+#ifdef 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 fs;
+ errno = 0;
+ fs = ptrace (PTRACE_PEEKUSER, lwpid,
+ offsetof (struct user_regs_struct, fs_base), 0);
+ if (errno == 0)
+ {
+ *base = (void *) fs;
+ return PS_OK;
+ }
+ }
+#endif
if (ptrace (PTRACE_ARCH_PRCTL, lwpid, base, ARCH_GET_FS) == 0)
return PS_OK;
break;
case GS:
+#ifdef HAVE_STRUCT_USER_REGS_STRUCT_GS_BASE
+ {
+ unsigned long gs;
+ errno = 0;
+ gs = ptrace (PTRACE_PEEKUSER, lwpid,
+ offsetof (struct user_regs_struct, gs_base), 0);
+ if (errno == 0)
+ {
+ *base = (void *) gs;
+ return PS_OK;
+ }
+ }
+#endif
if (ptrace (PTRACE_ARCH_PRCTL, lwpid, base, ARCH_GET_GS) == 0)
return PS_OK;
break;
@@ -409,13 +321,29 @@ ps_get_thread_area (const struct ps_prochandle *ph,
}
-void
-child_post_startup_inferior (ptid_t ptid)
+/* Convert a native/host siginfo object, into/from the siginfo in the
+ layout of the inferiors' architecture. Returns true if any
+ conversion was done; false otherwise. If DIRECTION is 1, then copy
+ from INF to NATIVE. If DIRECTION is 0, copy from NATIVE to
+ INF. */
+
+static int
+amd64_linux_siginfo_fixup (siginfo_t *native, gdb_byte *inf, int direction)
{
- i386_cleanup_dregs ();
- linux_child_post_startup_inferior (ptid);
+ struct gdbarch *gdbarch = get_frame_arch (get_current_frame ());
+
+ /* Is the inferior 32-bit? If so, then do fixup the siginfo
+ object. */
+ if (gdbarch_bfd_arch_info (gdbarch)->bits_per_word == 32)
+ return amd64_linux_siginfo_fixup_common (native, inf, direction,
+ FIXUP_32);
+ /* No fixup for native x32 GDB. */
+ else if (gdbarch_addr_bit (gdbarch) == 32 && sizeof (void *) == 8)
+ return amd64_linux_siginfo_fixup_common (native, inf, direction,
+ FIXUP_X32);
+ else
+ return 0;
}
-
/* Provide a prototype to silence -Wmissing-prototypes. */
void _initialize_amd64_linux_nat (void);
@@ -423,12 +351,26 @@ void _initialize_amd64_linux_nat (void);
void
_initialize_amd64_linux_nat (void)
{
+ struct target_ops *t;
+
amd64_native_gregset32_reg_offset = amd64_linux_gregset32_reg_offset;
amd64_native_gregset32_num_regs = I386_LINUX_NUM_REGS;
- amd64_native_gregset64_reg_offset = amd64_linux_gregset64_reg_offset;
+ amd64_native_gregset64_reg_offset = amd64_linux_gregset_reg_offset;
+ amd64_native_gregset64_num_regs = AMD64_LINUX_NUM_REGS;
gdb_assert (ARRAY_SIZE (amd64_linux_gregset32_reg_offset)
== amd64_native_gregset32_num_regs);
- gdb_assert (ARRAY_SIZE (amd64_linux_gregset64_reg_offset)
- == amd64_native_gregset64_num_regs);
+
+ /* Create a generic x86 GNU/Linux target. */
+ t = x86_linux_create_target ();
+
+ /* Add our register access methods. */
+ t->to_fetch_registers = amd64_linux_fetch_inferior_registers;
+ t->to_store_registers = amd64_linux_store_inferior_registers;
+
+ /* Add the target. */
+ x86_linux_add_target (t);
+
+ /* Add our siginfo layout converter. */
+ linux_nat_set_siginfo_fixup (t, amd64_linux_siginfo_fixup);
}