/* 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 "defs.h"
#include "inferior.h"
-#include "gdbcore.h"
#include "regcache.h"
-#include "regset.h"
-#include "linux-nat.h"
-#include "amd64-linux-tdep.h"
-
-#include "gdb_assert.h"
-#include "gdb_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 <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
- reason, and those definitions don't match the ones that libpthread_db
- uses, which come from <sys/reg.h>. */
-/* 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 <asm/ptrace.h>
#include <sys/reg.h>
-#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 "i386-nat.h"
-#include "i386-xstate.h"
-
-#ifndef PTRACE_GETREGSET
-#define PTRACE_GETREGSET 0x4204
-#endif
-
-#ifndef PTRACE_SETREGSET
-#define PTRACE_SETREGSET 0x4205
-#endif
-
-/* Per-thread arch-specific data we want to keep. */
-
-struct arch_lwp_info
-{
- /* Non-zero if our copy differs from what's recorded in the thread. */
- int debug_registers_changed;
-};
+#include "x86-xstate.h"
-/* Does the current host support PTRACE_GETREGSET? */
-static int have_ptrace_getregset = -1;
+#include "x86-linux-nat.h"
/* Mapping between the general-purpose registers in GNU/Linux x86-64
`struct user' format and GDB's register cache layout for GNU/Linux
-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))
{
if (have_ptrace_getregset)
{
- char xstateregs[I386_XSTATE_MAX_SIZE];
+ char xstateregs[X86_XSTATE_MAX_SIZE];
struct iovec iov;
iov.iov_base = xstateregs;
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))
{
if (have_ptrace_getregset)
{
- char xstateregs[I386_XSTATE_MAX_SIZE];
+ char xstateregs[X86_XSTATE_MAX_SIZE];
struct iovec iov;
iov.iov_base = xstateregs;
}
}
\f
-/* Support for debug registers. */
-
-static unsigned long
-amd64_linux_dr_get (ptid_t ptid, int regnum)
-{
- int tid;
- unsigned long value;
-
- tid = TIDGET (ptid);
- if (tid == 0)
- tid = PIDGET (ptid);
-
- errno = 0;
- value = ptrace (PTRACE_PEEKUSER, tid,
- offsetof (struct user, u_debugreg[regnum]), 0);
- if (errno != 0)
- perror_with_name (_("Couldn't read debug register"));
-
- return value;
-}
-
-/* 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)
-{
- int tid;
-
- tid = TIDGET (ptid);
- if (tid == 0)
- tid = PIDGET (ptid);
-
- errno = 0;
- ptrace (PTRACE_POKEUSER, tid,
- offsetof (struct user, u_debugreg[regnum]), value);
- if (errno != 0)
- perror_with_name (_("Couldn't write debug register"));
-}
-
-/* Return the inferior's debug register REGNUM. */
-
-static CORE_ADDR
-amd64_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 the inferior's DR7 debug control register. */
-
-static unsigned long
-amd64_linux_dr_get_control (void)
-{
- return amd64_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)
-{
- return amd64_linux_dr_get (inferior_ptid, DR_STATUS);
-}
-
-/* Callback for linux_nat_iterate_watchpoint_lwps. Update the debug registers
- of LWP. */
-
-static int
-update_debug_registers_callback (struct lwp_info *lwp, void *arg)
-{
- if (lwp->arch_private == NULL)
- lwp->arch_private = XCNEW (struct arch_lwp_info);
-
- /* The actual update is done later just before resuming the lwp, we
- just mark that the registers need updating. */
- lwp->arch_private->debug_registers_changed = 1;
-
- /* If the lwp isn't stopped, force it to momentarily pause, so we
- can update its debug registers. */
- if (!lwp->stopped)
- linux_stop_lwp (lwp);
-
- /* Continue the iteration. */
- return 0;
-}
-
-/* Set DR_CONTROL to CONTROL in all LWPs of the current inferior. */
-
-static void
-amd64_linux_dr_set_control (unsigned long control)
-{
- linux_nat_iterate_watchpoint_lwps (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)
-{
- gdb_assert (regnum >= 0 && regnum <= DR_LASTADDR - DR_FIRSTADDR);
-
- linux_nat_iterate_watchpoint_lwps (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)
-{
- int clear_status = 0;
-
- /* NULL means this is the main thread still going through the shell,
- or, no watchpoint has been set yet. In that case, there's
- nothing to do. */
- if (lwp->arch_private == NULL)
- return;
-
- if (lwp->arch_private->debug_registers_changed)
- {
- struct i386_debug_reg_state *state = i386_debug_reg_state ();
- int i;
-
- /* On Linux kernel before 2.6.33 commit
- 72f674d203cd230426437cdcf7dd6f681dad8b0d
- if you enable a breakpoint by the DR_CONTROL bits you need to have
- already written the corresponding DR_FIRSTADDR...DR_LASTADDR registers.
-
- Ensure DR_CONTROL gets written as the very last register here. */
-
- 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]);
-
- /* If we're setting a watchpoint, any change the inferior
- had done itself to the debug registers needs to be
- discarded, otherwise, i386_stopped_data_address can get
- confused. */
- clear_status = 1;
- }
-
- amd64_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);
-}
-
-static void
-amd64_linux_new_thread (struct lwp_info *lp)
-{
- struct arch_lwp_info *info = XCNEW (struct arch_lwp_info);
-
- info->debug_registers_changed = 1;
-
- lp->arch_private = info;
-}
-\f
/* 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_bfd_arch_info (target_gdbarch)->bits_per_word == 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];
-
- /* 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
{
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
-amd64_linux_child_post_startup_inferior (ptid_t ptid)
-{
- i386_cleanup_dregs ();
- super_post_startup_inferior (ptid);
-}
-\f
-
/* When GDB is built as a 64-bit application on linux, the
PTRACE_GETSIGINFO data is always presented in 64-bit layout. Since
debugging a 32-bit inferior with a 64-bit GDB should look the same
else
return 0;
}
-
-/* Get Linux/x86 target description from running target.
-
- Value of CS segment register:
- 1. 64bit process: 0x33.
- 2. 32bit process: 0x23.
-
- Value of DS segment register:
- 1. LP64 process: 0x0.
- 2. X32 process: 0x2b.
- */
-
-#define AMD64_LINUX_USER64_CS 0x33
-#define AMD64_LINUX_X32_DS 0x2b
-
-static const struct target_desc *
-amd64_linux_read_description (struct target_ops *ops)
-{
- unsigned long cs;
- unsigned long ds;
- int tid;
- int is_64bit;
- int is_x32;
- static uint64_t xcr0;
-
- /* GNU/Linux LWP ID's are process ID's. */
- tid = TIDGET (inferior_ptid);
- if (tid == 0)
- tid = PIDGET (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"));
-
- 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"));
-
- if (have_ptrace_getregset == -1)
- {
- uint64_t xstateregs[(I386_XSTATE_SSE_SIZE / sizeof (uint64_t))];
- struct iovec iov;
-
- iov.iov_base = xstateregs;
- iov.iov_len = sizeof (xstateregs);
-
- /* Check if PTRACE_GETREGSET works. */
- if (ptrace (PTRACE_GETREGSET, tid,
- (unsigned int) NT_X86_XSTATE, (long) &iov) < 0)
- have_ptrace_getregset = 0;
- else
- {
- have_ptrace_getregset = 1;
-
- /* Get XCR0 from XSAVE extended state. */
- xcr0 = xstateregs[(I386_LINUX_XSAVE_XCR0_OFFSET
- / sizeof (uint64_t))];
- }
- }
-
- /* Check the native XCR0 only if PTRACE_GETREGSET is available. */
- if (have_ptrace_getregset
- && (xcr0 & I386_XSTATE_AVX_MASK) == I386_XSTATE_AVX_MASK)
- {
- if (is_64bit)
- {
- if (is_x32)
- return tdesc_x32_avx_linux;
- else
- return tdesc_amd64_avx_linux;
- }
- else
- return tdesc_i386_avx_linux;
- }
- else
- {
- if (is_64bit)
- {
- if (is_x32)
- return tdesc_x32_linux;
- else
- return tdesc_amd64_linux;
- }
- else
- return tdesc_i386_linux;
- }
-}
+\f
/* Provide a prototype to silence -Wmissing-prototypes. */
void _initialize_amd64_linux_nat (void);
gdb_assert (ARRAY_SIZE (amd64_linux_gregset32_reg_offset)
== amd64_native_gregset32_num_regs);
- /* Fill in the generic GNU/Linux methods. */
- t = linux_target ();
-
- 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_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;
+ /* 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;
- t->to_read_description = amd64_linux_read_description;
+ /* Add the target. */
+ x86_linux_add_target (t);
- /* Register the target. */
- linux_nat_add_target (t);
- linux_nat_set_new_thread (t, amd64_linux_new_thread);
+ /* Add our siginfo layout converter. */
linux_nat_set_siginfo_fixup (t, amd64_linux_siginfo_fixup);
- linux_nat_set_prepare_to_resume (t, amd64_linux_prepare_to_resume);
}
projects / platform / upstream / binutils.git / blobdiff