/* Native-dependent code for GNU/Linux x86 (i386 and x86-64).
- Copyright (C) 1999-2015 Free Software Foundation, Inc.
+ Copyright (C) 1999-2020 Free Software Foundation, Inc.
This file is part of GDB.
#include "inferior.h"
#include "elf/common.h"
#include "gdb_proc_service.h"
-#include <sys/ptrace.h>
+#include "nat/gdb_ptrace.h"
#include <sys/user.h>
#include <sys/procfs.h>
#include <sys/uio.h>
#include "x86-nat.h"
-#include "linux-nat.h"
#ifndef __x86_64__
#include "i386-linux-nat.h"
#endif
#ifdef __x86_64__
#include "amd64-linux-tdep.h"
#endif
-#include "x86-xstate.h"
+#include "gdbsupport/x86-xstate.h"
#include "nat/linux-btrace.h"
#include "nat/linux-nat.h"
#include "nat/x86-linux.h"
#include "nat/x86-linux-dregs.h"
#include "nat/linux-ptrace.h"
-/* Per-thread arch-specific data we want to keep. */
+/* linux_nat_target::low_new_fork implementation. */
-struct arch_lwp_info
-{
- /* Non-zero if our copy differs from what's recorded in the thread. */
- int debug_registers_changed;
-};
-
-/* Does the current host support PTRACE_GETREGSET? */
-int have_ptrace_getregset = -1;
-\f
-
-/* linux_nat_new_fork hook. */
-
-static void
-x86_linux_new_fork (struct lwp_info *parent, pid_t child_pid)
+void
+x86_linux_nat_target::low_new_fork (struct lwp_info *parent, pid_t child_pid)
{
pid_t parent_pid;
struct x86_debug_reg_state *parent_state;
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_pid = parent->ptid.pid ();
parent_state = x86_debug_reg_state (parent_pid);
child_state = x86_debug_reg_state (child_pid);
*child_state = *parent_state;
}
\f
-static void (*super_post_startup_inferior) (struct target_ops *self,
- ptid_t ptid);
+x86_linux_nat_target::~x86_linux_nat_target ()
+{
+}
-static void
-x86_linux_child_post_startup_inferior (struct target_ops *self, ptid_t ptid)
+void
+x86_linux_nat_target::post_startup_inferior (ptid_t ptid)
{
x86_cleanup_dregs ();
- super_post_startup_inferior (self, ptid);
+ linux_nat_target::post_startup_inferior (ptid);
}
#ifdef __x86_64__
/* Get Linux/x86 target description from running target. */
-static const struct target_desc *
-x86_linux_read_description (struct target_ops *ops)
+const struct target_desc *
+x86_linux_nat_target::read_description ()
{
int tid;
int is_64bit = 0;
uint64_t xcr0_features_bits;
/* GNU/Linux LWP ID's are process ID's. */
- tid = ptid_get_lwp (inferior_ptid);
+ tid = inferior_ptid.lwp ();
if (tid == 0)
- tid = ptid_get_pid (inferior_ptid); /* Not a threaded program. */
+ tid = inferior_ptid.pid (); /* Not a threaded program. */
#ifdef __x86_64__
{
if (ptrace (PTRACE_GETFPXREGS, tid, 0, (int) &fpxregs) < 0)
{
have_ptrace_getfpxregs = 0;
- have_ptrace_getregset = 0;
- return tdesc_i386_mmx_linux;
+ have_ptrace_getregset = TRIBOOL_FALSE;
+ return i386_linux_read_description (X86_XSTATE_X87_MASK);
}
}
#endif
- if (have_ptrace_getregset == -1)
+ if (have_ptrace_getregset == TRIBOOL_UNKNOWN)
{
uint64_t xstateregs[(X86_XSTATE_SSE_SIZE / sizeof (uint64_t))];
struct iovec iov;
/* Check if PTRACE_GETREGSET works. */
if (ptrace (PTRACE_GETREGSET, tid,
(unsigned int) NT_X86_XSTATE, &iov) < 0)
- have_ptrace_getregset = 0;
+ have_ptrace_getregset = TRIBOOL_FALSE;
else
{
- have_ptrace_getregset = 1;
+ have_ptrace_getregset = TRIBOOL_TRUE;
/* Get XCR0 from XSAVE extended state. */
xcr0 = xstateregs[(I386_LINUX_XSAVE_XCR0_OFFSET
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)
+ if (have_ptrace_getregset == TRIBOOL_TRUE)
xcr0_features_bits = xcr0 & X86_XSTATE_ALL_MASK;
else
xcr0_features_bits = 0;
if (is_64bit)
{
#ifdef __x86_64__
- switch (xcr0_features_bits)
- {
- case X86_XSTATE_MPX_AVX512_MASK:
- case X86_XSTATE_AVX512_MASK:
- if (is_x32)
- return tdesc_x32_avx512_linux;
- else
- return tdesc_amd64_avx512_linux;
- case X86_XSTATE_MPX_MASK:
- if (is_x32)
- return tdesc_x32_avx_linux; /* No MPX on x32 using AVX. */
- else
- return tdesc_amd64_mpx_linux;
- case X86_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;
- }
+ return amd64_linux_read_description (xcr0_features_bits, is_x32);
#endif
}
else
{
- switch (xcr0_features_bits)
- {
- case X86_XSTATE_MPX_AVX512_MASK:
- case X86_XSTATE_AVX512_MASK:
- return tdesc_i386_avx512_linux;
- case X86_XSTATE_MPX_MASK:
- return tdesc_i386_mpx_linux;
- case X86_XSTATE_AVX_MASK:
- return tdesc_i386_avx_linux;
- default:
- return tdesc_i386_linux;
- }
+ const struct target_desc * tdesc
+ = i386_linux_read_description (xcr0_features_bits);
+
+ if (tdesc == NULL)
+ tdesc = i386_linux_read_description (X86_XSTATE_SSE_MASK);
+
+ return tdesc;
}
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,
- const struct btrace_config *conf)
+struct btrace_target_info *
+x86_linux_nat_target::enable_btrace (ptid_t ptid,
+ const struct btrace_config *conf)
{
- struct btrace_target_info *tinfo;
- struct gdbarch *gdbarch;
-
- errno = 0;
- tinfo = linux_enable_btrace (ptid, conf);
-
- 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. */
- if (tinfo->ptr_bits == 0)
+ struct btrace_target_info *tinfo = nullptr;
+ try
{
- gdbarch = target_thread_architecture (ptid);
- tinfo->ptr_bits = gdbarch_ptr_bit (gdbarch);
+ tinfo = linux_enable_btrace (ptid, conf);
}
+ catch (const gdb_exception_error &exception)
+ {
+ error (_("Could not enable branch tracing for %s: %s"),
+ target_pid_to_str (ptid).c_str (), exception.what ());
+ }
+
return tinfo;
}
/* Disable branch tracing. */
-static void
-x86_linux_disable_btrace (struct target_ops *self,
- struct btrace_target_info *tinfo)
+void
+x86_linux_nat_target::disable_btrace (struct btrace_target_info *tinfo)
{
enum btrace_error errcode = linux_disable_btrace (tinfo);
/* Teardown branch tracing. */
-static void
-x86_linux_teardown_btrace (struct target_ops *self,
- struct btrace_target_info *tinfo)
+void
+x86_linux_nat_target::teardown_btrace (struct btrace_target_info *tinfo)
{
/* Ignore errors. */
linux_disable_btrace (tinfo);
}
-static enum btrace_error
-x86_linux_read_btrace (struct target_ops *self,
- struct btrace_data *data,
- struct btrace_target_info *btinfo,
- enum btrace_read_type type)
+enum btrace_error
+x86_linux_nat_target::read_btrace (struct btrace_data *data,
+ struct btrace_target_info *btinfo,
+ enum btrace_read_type type)
{
return linux_read_btrace (data, btinfo, type);
}
/* See to_btrace_conf in target.h. */
-static const struct btrace_config *
-x86_linux_btrace_conf (struct target_ops *self,
- const struct btrace_target_info *btinfo)
+const struct btrace_config *
+x86_linux_nat_target::btrace_conf (const struct btrace_target_info *btinfo)
{
return linux_btrace_conf (btinfo);
}
}
\f
-/* Create an x86 GNU/Linux target. */
-
-struct target_ops *
-x86_linux_create_target (void)
+void _initialize_x86_linux_nat ();
+void
+_initialize_x86_linux_nat ()
{
- /* Fill in the generic GNU/Linux methods. */
- struct target_ops *t = linux_target ();
-
/* Initialize the debug register function vectors. */
- x86_use_watchpoints (t);
x86_dr_low.set_control = x86_linux_dr_set_control;
x86_dr_low.set_addr = x86_linux_dr_set_addr;
x86_dr_low.get_addr = x86_linux_dr_get_addr;
x86_dr_low.get_status = x86_linux_dr_get_status;
x86_dr_low.get_control = x86_linux_dr_get_control;
x86_set_debug_register_length (sizeof (void *));
-
- /* Override the GNU/Linux inferior startup hook. */
- super_post_startup_inferior = t->to_post_startup_inferior;
- t->to_post_startup_inferior = x86_linux_child_post_startup_inferior;
-
- /* Add the description reader. */
- 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;
- t->to_btrace_conf = x86_linux_btrace_conf;
-
- return t;
-}
-
-/* Add an x86 GNU/Linux target. */
-
-void
-x86_linux_add_target (struct target_ops *t)
-{
- linux_nat_add_target (t);
- 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, x86_forget_process);
- linux_nat_set_prepare_to_resume (t, x86_linux_prepare_to_resume);
}
projects / deliverable / binutils-gdb.git / blobdiff