/* Native-dependent code for GNU/Linux x86-64.
- Copyright (C) 2001-2012 Free Software Foundation, Inc.
+ Copyright (C) 2001-2014 Free Software Foundation, Inc.
Contributed by Jiri Smid, SuSE Labs.
This file is part of GDB.
#include "regset.h"
#include "linux-nat.h"
#include "amd64-linux-tdep.h"
+#include "nat/linux-btrace.h"
+#include "btrace.h"
#include "gdb_assert.h"
-#include "gdb_string.h"
+#include <string.h>
#include "elf/common.h"
#include <sys/uio.h>
#include <sys/ptrace.h>
#include <sys/debugreg.h>
#include <sys/syscall.h>
#include <sys/procfs.h>
+#include <sys/user.h>
#include <asm/prctl.h>
/* FIXME ezannoni-2003-07-09: we need <sys/reg.h> to be included after
<asm/ptrace.h> because the latter redefines FS and GS for no apparent
-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, /* 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" */
};
\f
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 (gdbarch, regnum))
{
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 (gdbarch, regnum))
{
/* Support for debug registers. */
static unsigned long
-amd64_linux_dr_get (ptid_t ptid, int regnum)
+x86_linux_dr_get (ptid_t ptid, int regnum)
{
int tid;
unsigned long value;
- tid = TIDGET (ptid);
+ tid = ptid_get_lwp (ptid);
if (tid == 0)
- tid = PIDGET (ptid);
+ tid = ptid_get_pid (ptid);
errno = 0;
value = ptrace (PTRACE_PEEKUSER, tid,
/* Set debug register REGNUM to VALUE in only the one LWP of PTID. */
static void
-amd64_linux_dr_set (ptid_t ptid, int regnum, unsigned long value)
+x86_linux_dr_set (ptid_t ptid, int regnum, unsigned long value)
{
int tid;
- tid = TIDGET (ptid);
+ tid = ptid_get_lwp (ptid);
if (tid == 0)
- tid = PIDGET (ptid);
+ tid = ptid_get_pid (ptid);
errno = 0;
ptrace (PTRACE_POKEUSER, tid,
/* Return the inferior's debug register REGNUM. */
static CORE_ADDR
-amd64_linux_dr_get_addr (int regnum)
+x86_linux_dr_get_addr (int regnum)
{
/* DR6 and DR7 are retrieved with some other way. */
gdb_assert (DR_FIRSTADDR <= regnum && regnum <= DR_LASTADDR);
- return amd64_linux_dr_get (inferior_ptid, regnum);
+ return x86_linux_dr_get (inferior_ptid, regnum);
}
/* Return the inferior's DR7 debug control register. */
static unsigned long
-amd64_linux_dr_get_control (void)
+x86_linux_dr_get_control (void)
{
- return amd64_linux_dr_get (inferior_ptid, DR_CONTROL);
+ return x86_linux_dr_get (inferior_ptid, DR_CONTROL);
}
/* Get DR_STATUS from only the one LWP of INFERIOR_PTID. */
static unsigned long
-amd64_linux_dr_get_status (void)
+x86_linux_dr_get_status (void)
{
- return amd64_linux_dr_get (inferior_ptid, DR_STATUS);
+ return x86_linux_dr_get (inferior_ptid, DR_STATUS);
}
-/* Callback for linux_nat_iterate_watchpoint_lwps. Update the debug registers
- of LWP. */
+/* Callback for iterate_over_lwps. Update the debug registers of
+ LWP. */
static int
update_debug_registers_callback (struct lwp_info *lwp, void *arg)
/* Set DR_CONTROL to CONTROL in all LWPs of the current inferior. */
static void
-amd64_linux_dr_set_control (unsigned long control)
+x86_linux_dr_set_control (unsigned long control)
{
- linux_nat_iterate_watchpoint_lwps (update_debug_registers_callback, NULL);
+ ptid_t pid_ptid = pid_to_ptid (ptid_get_pid (inferior_ptid));
+
+ iterate_over_lwps (pid_ptid, update_debug_registers_callback, NULL);
}
/* Set address REGNUM (zero based) to ADDR in all LWPs of the current
inferior. */
static void
-amd64_linux_dr_set_addr (int regnum, CORE_ADDR addr)
+x86_linux_dr_set_addr (int regnum, CORE_ADDR addr)
{
+ ptid_t pid_ptid = pid_to_ptid (ptid_get_pid (inferior_ptid));
+
gdb_assert (regnum >= 0 && regnum <= DR_LASTADDR - DR_FIRSTADDR);
- linux_nat_iterate_watchpoint_lwps (update_debug_registers_callback, NULL);
+ iterate_over_lwps (pid_ptid, update_debug_registers_callback, NULL);
}
/* Called when resuming a thread.
If the debug regs have changed, update the thread's copies. */
static void
-amd64_linux_prepare_to_resume (struct lwp_info *lwp)
+x86_linux_prepare_to_resume (struct lwp_info *lwp)
{
int clear_status = 0;
if (lwp->arch_private->debug_registers_changed)
{
- struct i386_debug_reg_state *state = i386_debug_reg_state ();
+ struct i386_debug_reg_state *state
+ = i386_debug_reg_state (ptid_get_pid (lwp->ptid));
int i;
/* On Linux kernel before 2.6.33 commit
Ensure DR_CONTROL gets written as the very last register here. */
+ /* Clear DR_CONTROL first. In some cases, setting DR0-3 to a
+ value that doesn't match what is enabled in DR_CONTROL
+ results in EINVAL. */
+ x86_linux_dr_set (lwp->ptid, DR_CONTROL, 0);
+
for (i = DR_FIRSTADDR; i <= DR_LASTADDR; i++)
if (state->dr_ref_count[i] > 0)
{
- amd64_linux_dr_set (lwp->ptid, i, state->dr_mirror[i]);
+ x86_linux_dr_set (lwp->ptid, i, state->dr_mirror[i]);
/* If we're setting a watchpoint, any change the inferior
had done itself to the debug registers needs to be
clear_status = 1;
}
- amd64_linux_dr_set (lwp->ptid, DR_CONTROL, state->dr_control_mirror);
+ /* If DR_CONTROL is supposed to be zero, we've already set it
+ above. */
+ if (state->dr_control_mirror != 0)
+ x86_linux_dr_set (lwp->ptid, DR_CONTROL, state->dr_control_mirror);
lwp->arch_private->debug_registers_changed = 0;
}
if (clear_status || lwp->stopped_by_watchpoint)
- amd64_linux_dr_set (lwp->ptid, DR_STATUS, 0);
+ x86_linux_dr_set (lwp->ptid, DR_STATUS, 0);
}
static void
-amd64_linux_new_thread (struct lwp_info *lp)
+x86_linux_new_thread (struct lwp_info *lp)
{
struct arch_lwp_info *info = XCNEW (struct arch_lwp_info);
lp->arch_private = info;
}
+
+/* linux_nat_new_fork hook. */
+
+static void
+x86_linux_new_fork (struct lwp_info *parent, pid_t child_pid)
+{
+ pid_t parent_pid;
+ struct i386_debug_reg_state *parent_state;
+ struct i386_debug_reg_state *child_state;
+
+ /* NULL means no watchpoint has ever been set in the parent. In
+ that case, there's nothing to do. */
+ if (parent->arch_private == NULL)
+ return;
+
+ /* Linux kernel before 2.6.33 commit
+ 72f674d203cd230426437cdcf7dd6f681dad8b0d
+ will inherit hardware debug registers from parent
+ on fork/vfork/clone. Newer Linux kernels create such tasks with
+ zeroed debug registers.
+
+ GDB core assumes the child inherits the watchpoints/hw
+ breakpoints of the parent, and will remove them all from the
+ forked off process. Copy the debug registers mirrors into the
+ new process so that all breakpoints and watchpoints can be
+ removed together. The debug registers mirror will become zeroed
+ in the end before detaching the forked off process, thus making
+ this compatible with older Linux kernels too. */
+
+ parent_pid = ptid_get_pid (parent->ptid);
+ parent_state = i386_debug_reg_state (parent_pid);
+ child_state = i386_debug_reg_state (child_pid);
+ *child_state = *parent_state;
+}
+
\f
+/* Helper for ps_get_thread_area. Sets BASE_ADDR to a pointer to
+ the thread local storage (or its descriptor) and returns PS_OK
+ on success. Returns PS_ERR on failure. */
+
+static ps_err_e
+x86_linux_get_thread_area (pid_t pid, void *addr, unsigned int *base_addr)
+{
+ /* NOTE: cagney/2003-08-26: The definition of this buffer is found
+ in the kernel header <asm-i386/ldt.h>. It, after padding, is 4 x
+ 4 byte integers in size: `entry_number', `base_addr', `limit',
+ and a bunch of status bits.
+
+ The values returned by this ptrace call should be part of the
+ regcache buffer, and ps_get_thread_area should channel its
+ request through the regcache. That way remote targets could
+ provide the value using the remote protocol and not this direct
+ call.
+
+ Is this function needed? I'm guessing that the `base' is the
+ address of a descriptor that libthread_db uses to find the
+ thread local address base that GDB needs. Perhaps that
+ descriptor is defined by the ABI. Anyway, given that
+ libthread_db calls this function without prompting (gdb
+ requesting tls base) I guess it needs info in there anyway. */
+ 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, pid, addr, &desc) < 0)
+ return PS_ERR;
+
+ *base_addr = desc[1];
+ return PS_OK;
+}
+
/* This function is called by libthread_db as part of its handling of
a request for a thread's local storage address. */
ps_get_thread_area (const struct ps_prochandle *ph,
lwpid_t lwpid, int idx, void **base)
{
- if (gdbarch_ptr_bit (target_gdbarch) == 32)
+ if (gdbarch_bfd_arch_info (target_gdbarch ())->bits_per_word == 32)
{
- /* The full structure is found in <asm-i386/ldt.h>. 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];
+ unsigned int base_addr;
+ ps_err_e result;
- /* 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;
+ 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
{
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;
}
\f
-static void (*super_post_startup_inferior) (ptid_t ptid);
+static void (*super_post_startup_inferior) (struct target_ops *self,
+ ptid_t ptid);
static void
-amd64_linux_child_post_startup_inferior (ptid_t ptid)
+x86_linux_child_post_startup_inferior (struct target_ops *self, ptid_t ptid)
{
i386_cleanup_dregs ();
- super_post_startup_inferior (ptid);
+ super_post_startup_inferior (self, ptid);
}
\f
} _sifields;
} compat_siginfo_t;
+/* For x32, clock_t in _sigchld is 64bit aligned at 4 bytes. */
+typedef struct compat_x32_clock
+{
+ int lower;
+ int upper;
+} compat_x32_clock_t;
+
+typedef struct compat_x32_siginfo
+{
+ int si_signo;
+ int si_errno;
+ int si_code;
+
+ union
+ {
+ int _pad[((128 / sizeof (int)) - 3)];
+
+ /* kill() */
+ struct
+ {
+ unsigned int _pid;
+ unsigned int _uid;
+ } _kill;
+
+ /* POSIX.1b timers */
+ struct
+ {
+ compat_timer_t _tid;
+ int _overrun;
+ compat_sigval_t _sigval;
+ } _timer;
+
+ /* POSIX.1b signals */
+ struct
+ {
+ unsigned int _pid;
+ unsigned int _uid;
+ compat_sigval_t _sigval;
+ } _rt;
+
+ /* SIGCHLD */
+ struct
+ {
+ unsigned int _pid;
+ unsigned int _uid;
+ int _status;
+ compat_x32_clock_t _utime;
+ compat_x32_clock_t _stime;
+ } _sigchld;
+
+ /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
+ struct
+ {
+ unsigned int _addr;
+ } _sigfault;
+
+ /* SIGPOLL */
+ struct
+ {
+ int _band;
+ int _fd;
+ } _sigpoll;
+ } _sifields;
+} compat_x32_siginfo_t;
+
#define cpt_si_pid _sifields._kill._pid
#define cpt_si_uid _sifields._kill._uid
#define cpt_si_timerid _sifields._timer._tid
}
}
+static void
+compat_x32_siginfo_from_siginfo (compat_x32_siginfo_t *to,
+ siginfo_t *from)
+{
+ memset (to, 0, sizeof (*to));
+
+ to->si_signo = from->si_signo;
+ to->si_errno = from->si_errno;
+ to->si_code = from->si_code;
+
+ if (to->si_code == SI_TIMER)
+ {
+ to->cpt_si_timerid = from->si_timerid;
+ to->cpt_si_overrun = from->si_overrun;
+ to->cpt_si_ptr = (intptr_t) from->si_ptr;
+ }
+ else if (to->si_code == SI_USER)
+ {
+ to->cpt_si_pid = from->si_pid;
+ to->cpt_si_uid = from->si_uid;
+ }
+ else if (to->si_code < 0)
+ {
+ to->cpt_si_pid = from->si_pid;
+ to->cpt_si_uid = from->si_uid;
+ to->cpt_si_ptr = (intptr_t) from->si_ptr;
+ }
+ else
+ {
+ switch (to->si_signo)
+ {
+ case SIGCHLD:
+ to->cpt_si_pid = from->si_pid;
+ to->cpt_si_uid = from->si_uid;
+ to->cpt_si_status = from->si_status;
+ memcpy (&to->cpt_si_utime, &from->si_utime,
+ sizeof (to->cpt_si_utime));
+ memcpy (&to->cpt_si_stime, &from->si_stime,
+ sizeof (to->cpt_si_stime));
+ break;
+ case SIGILL:
+ case SIGFPE:
+ case SIGSEGV:
+ case SIGBUS:
+ to->cpt_si_addr = (intptr_t) from->si_addr;
+ break;
+ case SIGPOLL:
+ to->cpt_si_band = from->si_band;
+ to->cpt_si_fd = from->si_fd;
+ break;
+ default:
+ to->cpt_si_pid = from->si_pid;
+ to->cpt_si_uid = from->si_uid;
+ to->cpt_si_ptr = (intptr_t) from->si_ptr;
+ break;
+ }
+ }
+}
+
+static void
+siginfo_from_compat_x32_siginfo (siginfo_t *to,
+ compat_x32_siginfo_t *from)
+{
+ memset (to, 0, sizeof (*to));
+
+ to->si_signo = from->si_signo;
+ to->si_errno = from->si_errno;
+ to->si_code = from->si_code;
+
+ if (to->si_code == SI_TIMER)
+ {
+ to->si_timerid = from->cpt_si_timerid;
+ to->si_overrun = from->cpt_si_overrun;
+ to->si_ptr = (void *) (intptr_t) from->cpt_si_ptr;
+ }
+ else if (to->si_code == SI_USER)
+ {
+ to->si_pid = from->cpt_si_pid;
+ to->si_uid = from->cpt_si_uid;
+ }
+ if (to->si_code < 0)
+ {
+ to->si_pid = from->cpt_si_pid;
+ to->si_uid = from->cpt_si_uid;
+ to->si_ptr = (void *) (intptr_t) from->cpt_si_ptr;
+ }
+ else
+ {
+ switch (to->si_signo)
+ {
+ case SIGCHLD:
+ to->si_pid = from->cpt_si_pid;
+ to->si_uid = from->cpt_si_uid;
+ to->si_status = from->cpt_si_status;
+ memcpy (&to->si_utime, &from->cpt_si_utime,
+ sizeof (to->si_utime));
+ memcpy (&to->si_stime, &from->cpt_si_stime,
+ sizeof (to->si_stime));
+ break;
+ case SIGILL:
+ case SIGFPE:
+ case SIGSEGV:
+ case SIGBUS:
+ to->si_addr = (void *) (intptr_t) from->cpt_si_addr;
+ break;
+ case SIGPOLL:
+ to->si_band = from->cpt_si_band;
+ to->si_fd = from->cpt_si_fd;
+ break;
+ default:
+ to->si_pid = from->cpt_si_pid;
+ to->si_uid = from->cpt_si_uid;
+ to->si_ptr = (void* ) (intptr_t) from->cpt_si_ptr;
+ break;
+ }
+ }
+}
+
/* 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
static int
amd64_linux_siginfo_fixup (siginfo_t *native, gdb_byte *inf, int direction)
{
+ struct gdbarch *gdbarch = get_frame_arch (get_current_frame ());
+
/* Is the inferior 32-bit? If so, then do fixup the siginfo
object. */
- if (gdbarch_addr_bit (get_frame_arch (get_current_frame ())) == 32)
+ if (gdbarch_bfd_arch_info (gdbarch)->bits_per_word == 32)
{
gdb_assert (sizeof (siginfo_t) == sizeof (compat_siginfo_t));
else
siginfo_from_compat_siginfo (native, (struct compat_siginfo *) inf);
+ return 1;
+ }
+ /* No fixup for native x32 GDB. */
+ else if (gdbarch_addr_bit (gdbarch) == 32 && sizeof (void *) == 8)
+ {
+ gdb_assert (sizeof (siginfo_t) == sizeof (compat_x32_siginfo_t));
+
+ if (direction == 0)
+ compat_x32_siginfo_from_siginfo ((struct compat_x32_siginfo *) inf,
+ native);
+ else
+ siginfo_from_compat_x32_siginfo (native,
+ (struct compat_x32_siginfo *) inf);
+
return 1;
}
else
return 0;
}
-/* Get Linux/x86 target description from running target.
+#ifdef __x86_64__
+/* Value of CS segment register:
+ 64bit process: 0x33
+ 32bit process: 0x23 */
+#define AMD64_LINUX_USER64_CS 0x33
- Value of CS segment register:
- 1. 64bit process: 0x33.
- 2. 32bit process: 0x23.
- */
+/* Value of DS segment register:
+ LP64 process: 0x0
+ X32 process: 0x2b */
+#define AMD64_LINUX_X32_DS 0x2b
+#endif
-#define AMD64_LINUX_USER64_CS 0x33
+/* Get Linux/x86 target description from running target. */
static const struct target_desc *
-amd64_linux_read_description (struct target_ops *ops)
+x86_linux_read_description (struct target_ops *ops)
{
- unsigned long cs;
int tid;
- int is_64bit;
+ int is_64bit = 0;
+#ifdef __x86_64__
+ int is_x32;
+#endif
static uint64_t xcr0;
+ uint64_t xcr0_features_bits;
/* 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. */
- /* Get CS register. */
- errno = 0;
- cs = ptrace (PTRACE_PEEKUSER, tid,
- offsetof (struct user_regs_struct, cs), 0);
- if (errno != 0)
- perror_with_name (_("Couldn't get CS register"));
+#ifdef __x86_64__
+ {
+ unsigned long cs;
+ unsigned long ds;
+
+ /* Get CS register. */
+ errno = 0;
+ cs = ptrace (PTRACE_PEEKUSER, tid,
+ offsetof (struct user_regs_struct, cs), 0);
+ if (errno != 0)
+ perror_with_name (_("Couldn't get CS register"));
+
+ is_64bit = cs == AMD64_LINUX_USER64_CS;
+
+ /* Get DS register. */
+ errno = 0;
+ ds = ptrace (PTRACE_PEEKUSER, tid,
+ offsetof (struct user_regs_struct, ds), 0);
+ if (errno != 0)
+ perror_with_name (_("Couldn't get DS register"));
+
+ is_x32 = ds == AMD64_LINUX_X32_DS;
+
+ if (sizeof (void *) == 4 && is_64bit && !is_x32)
+ error (_("Can't debug 64-bit process with 32-bit GDB"));
+ }
+#elif HAVE_PTRACE_GETFPXREGS
+ if (have_ptrace_getfpxregs == -1)
+ {
+ elf_fpxregset_t fpxregs;
- is_64bit = cs == AMD64_LINUX_USER64_CS;
+ if (ptrace (PTRACE_GETFPXREGS, tid, 0, (int) &fpxregs) < 0)
+ {
+ have_ptrace_getfpxregs = 0;
+ have_ptrace_getregset = 0;
+ return tdesc_i386_mmx_linux;
+ }
+ }
+#endif
if (have_ptrace_getregset == -1)
{
/* Check if PTRACE_GETREGSET works. */
if (ptrace (PTRACE_GETREGSET, tid,
- (unsigned int) NT_X86_XSTATE, (long) &iov) < 0)
+ (unsigned int) NT_X86_XSTATE, &iov) < 0)
have_ptrace_getregset = 0;
else
{
}
}
- /* Check the native XCR0 only if PTRACE_GETREGSET is available. */
- if (have_ptrace_getregset
- && (xcr0 & I386_XSTATE_AVX_MASK) == I386_XSTATE_AVX_MASK)
+ /* Check the native XCR0 only if PTRACE_GETREGSET is available. If
+ PTRACE_GETREGSET is not available then set xcr0_features_bits to
+ zero so that the "no-features" descriptions are returned by the
+ switches below. */
+ if (have_ptrace_getregset)
+ xcr0_features_bits = xcr0 & I386_XSTATE_ALL_MASK;
+ else
+ xcr0_features_bits = 0;
+
+ if (is_64bit)
{
- if (is_64bit)
- return tdesc_amd64_avx_linux;
- else
- return tdesc_i386_avx_linux;
+#ifdef __x86_64__
+ switch (xcr0_features_bits)
+ {
+ case I386_XSTATE_MPX_AVX512_MASK:
+ case I386_XSTATE_AVX512_MASK:
+ if (is_x32)
+ return tdesc_x32_avx512_linux;
+ else
+ return tdesc_amd64_avx512_linux;
+ case I386_XSTATE_MPX_MASK:
+ if (is_x32)
+ return tdesc_x32_avx_linux; /* No MPX on x32 using AVX. */
+ else
+ return tdesc_amd64_mpx_linux;
+ case I386_XSTATE_AVX_MASK:
+ if (is_x32)
+ return tdesc_x32_avx_linux;
+ else
+ return tdesc_amd64_avx_linux;
+ default:
+ if (is_x32)
+ return tdesc_x32_linux;
+ else
+ return tdesc_amd64_linux;
+ }
+#endif
}
else
{
- if (is_64bit)
- return tdesc_amd64_linux;
- else
- return tdesc_i386_linux;
+ switch (xcr0_features_bits)
+ {
+ case I386_XSTATE_MPX_AVX512_MASK:
+ case I386_XSTATE_AVX512_MASK:
+ return tdesc_i386_avx512_linux;
+ case I386_XSTATE_MPX_MASK:
+ return tdesc_i386_mpx_linux;
+ case I386_XSTATE_AVX_MASK:
+ return tdesc_i386_avx_linux;
+ default:
+ return tdesc_i386_linux;
+ }
}
+
+ gdb_assert_not_reached ("failed to return tdesc");
+}
+
+/* Enable branch tracing. */
+
+static struct btrace_target_info *
+x86_linux_enable_btrace (struct target_ops *self, ptid_t ptid)
+{
+ struct btrace_target_info *tinfo;
+ struct gdbarch *gdbarch;
+
+ errno = 0;
+ tinfo = linux_enable_btrace (ptid);
+
+ if (tinfo == NULL)
+ error (_("Could not enable branch tracing for %s: %s."),
+ target_pid_to_str (ptid), safe_strerror (errno));
+
+ /* Fill in the size of a pointer in bits. */
+ gdbarch = target_thread_architecture (ptid);
+ tinfo->ptr_bits = gdbarch_ptr_bit (gdbarch);
+
+ return tinfo;
+}
+
+/* Disable branch tracing. */
+
+static void
+x86_linux_disable_btrace (struct target_ops *self,
+ struct btrace_target_info *tinfo)
+{
+ enum btrace_error errcode = linux_disable_btrace (tinfo);
+
+ if (errcode != BTRACE_ERR_NONE)
+ error (_("Could not disable branch tracing."));
+}
+
+/* Teardown branch tracing. */
+
+static void
+x86_linux_teardown_btrace (struct target_ops *self,
+ struct btrace_target_info *tinfo)
+{
+ /* Ignore errors. */
+ linux_disable_btrace (tinfo);
+}
+
+static enum btrace_error
+x86_linux_read_btrace (struct target_ops *self,
+ VEC (btrace_block_s) **data,
+ struct btrace_target_info *btinfo,
+ enum btrace_read_type type)
+{
+ return linux_read_btrace (data, btinfo, type);
}
/* Provide a prototype to silence -Wmissing-prototypes. */
i386_use_watchpoints (t);
- i386_dr_low.set_control = amd64_linux_dr_set_control;
- i386_dr_low.set_addr = amd64_linux_dr_set_addr;
- i386_dr_low.get_addr = amd64_linux_dr_get_addr;
- i386_dr_low.get_status = amd64_linux_dr_get_status;
- i386_dr_low.get_control = amd64_linux_dr_get_control;
+ i386_dr_low.set_control = x86_linux_dr_set_control;
+ i386_dr_low.set_addr = x86_linux_dr_set_addr;
+ i386_dr_low.get_addr = x86_linux_dr_get_addr;
+ i386_dr_low.get_status = x86_linux_dr_get_status;
+ i386_dr_low.get_control = x86_linux_dr_get_control;
i386_set_debug_register_length (8);
/* Override the GNU/Linux inferior startup hook. */
super_post_startup_inferior = t->to_post_startup_inferior;
- t->to_post_startup_inferior = amd64_linux_child_post_startup_inferior;
+ t->to_post_startup_inferior = x86_linux_child_post_startup_inferior;
/* Add our register access methods. */
t->to_fetch_registers = amd64_linux_fetch_inferior_registers;
t->to_store_registers = amd64_linux_store_inferior_registers;
- t->to_read_description = amd64_linux_read_description;
+ t->to_read_description = x86_linux_read_description;
+
+ /* Add btrace methods. */
+ t->to_supports_btrace = linux_supports_btrace;
+ t->to_enable_btrace = x86_linux_enable_btrace;
+ t->to_disable_btrace = x86_linux_disable_btrace;
+ t->to_teardown_btrace = x86_linux_teardown_btrace;
+ t->to_read_btrace = x86_linux_read_btrace;
/* Register the target. */
linux_nat_add_target (t);
- linux_nat_set_new_thread (t, amd64_linux_new_thread);
+ linux_nat_set_new_thread (t, x86_linux_new_thread);
+ linux_nat_set_new_fork (t, x86_linux_new_fork);
+ linux_nat_set_forget_process (t, i386_forget_process);
linux_nat_set_siginfo_fixup (t, amd64_linux_siginfo_fixup);
- linux_nat_set_prepare_to_resume (t, amd64_linux_prepare_to_resume);
+ linux_nat_set_prepare_to_resume (t, x86_linux_prepare_to_resume);
}