1 /* GNU/Linux/x86-64 specific low level interface, for the remote server
3 Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008, 2009, 2010
4 Free Software Foundation, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #include "linux-low.h"
27 #include "i386-xstate.h"
28 #include "elf/common.h"
30 #include "gdb_proc_service.h"
32 /* Defined in auto-generated file i386-linux.c. */
33 void init_registers_i386_linux (void);
34 /* Defined in auto-generated file amd64-linux.c. */
35 void init_registers_amd64_linux (void);
36 /* Defined in auto-generated file i386-avx-linux.c. */
37 void init_registers_i386_avx_linux (void);
38 /* Defined in auto-generated file amd64-avx-linux.c. */
39 void init_registers_amd64_avx_linux (void);
40 /* Defined in auto-generated file i386-mmx-linux.c. */
41 void init_registers_i386_mmx_linux (void);
43 /* Backward compatibility for gdb without XML support. */
45 static const char *xmltarget_i386_linux_no_xml
= "@<target>\
46 <architecture>i386</architecture>\
47 <osabi>GNU/Linux</osabi>\
49 static const char *xmltarget_amd64_linux_no_xml
= "@<target>\
50 <architecture>i386:x86-64</architecture>\
51 <osabi>GNU/Linux</osabi>\
55 #include <sys/procfs.h>
56 #include <sys/ptrace.h>
59 #ifndef PTRACE_GETREGSET
60 #define PTRACE_GETREGSET 0x4204
63 #ifndef PTRACE_SETREGSET
64 #define PTRACE_SETREGSET 0x4205
68 #ifndef PTRACE_GET_THREAD_AREA
69 #define PTRACE_GET_THREAD_AREA 25
72 /* This definition comes from prctl.h, but some kernels may not have it. */
73 #ifndef PTRACE_ARCH_PRCTL
74 #define PTRACE_ARCH_PRCTL 30
77 /* The following definitions come from prctl.h, but may be absent
78 for certain configurations. */
80 #define ARCH_SET_GS 0x1001
81 #define ARCH_SET_FS 0x1002
82 #define ARCH_GET_FS 0x1003
83 #define ARCH_GET_GS 0x1004
86 /* Per-process arch-specific data we want to keep. */
88 struct arch_process_info
90 struct i386_debug_reg_state debug_reg_state
;
93 /* Per-thread arch-specific data we want to keep. */
97 /* Non-zero if our copy differs from what's recorded in the thread. */
98 int debug_registers_changed
;
103 /* Mapping between the general-purpose registers in `struct user'
104 format and GDB's register array layout.
105 Note that the transfer layout uses 64-bit regs. */
106 static /*const*/ int i386_regmap
[] =
108 RAX
* 8, RCX
* 8, RDX
* 8, RBX
* 8,
109 RSP
* 8, RBP
* 8, RSI
* 8, RDI
* 8,
110 RIP
* 8, EFLAGS
* 8, CS
* 8, SS
* 8,
111 DS
* 8, ES
* 8, FS
* 8, GS
* 8
114 #define I386_NUM_REGS (sizeof (i386_regmap) / sizeof (i386_regmap[0]))
116 /* So code below doesn't have to care, i386 or amd64. */
117 #define ORIG_EAX ORIG_RAX
119 static const int x86_64_regmap
[] =
121 RAX
* 8, RBX
* 8, RCX
* 8, RDX
* 8,
122 RSI
* 8, RDI
* 8, RBP
* 8, RSP
* 8,
123 R8
* 8, R9
* 8, R10
* 8, R11
* 8,
124 R12
* 8, R13
* 8, R14
* 8, R15
* 8,
125 RIP
* 8, EFLAGS
* 8, CS
* 8, SS
* 8,
126 DS
* 8, ES
* 8, FS
* 8, GS
* 8,
127 -1, -1, -1, -1, -1, -1, -1, -1,
128 -1, -1, -1, -1, -1, -1, -1, -1,
129 -1, -1, -1, -1, -1, -1, -1, -1,
130 -1, -1, -1, -1, -1, -1, -1, -1, -1,
134 #define X86_64_NUM_REGS (sizeof (x86_64_regmap) / sizeof (x86_64_regmap[0]))
136 #else /* ! __x86_64__ */
138 /* Mapping between the general-purpose registers in `struct user'
139 format and GDB's register array layout. */
140 static /*const*/ int i386_regmap
[] =
142 EAX
* 4, ECX
* 4, EDX
* 4, EBX
* 4,
143 UESP
* 4, EBP
* 4, ESI
* 4, EDI
* 4,
144 EIP
* 4, EFL
* 4, CS
* 4, SS
* 4,
145 DS
* 4, ES
* 4, FS
* 4, GS
* 4
148 #define I386_NUM_REGS (sizeof (i386_regmap) / sizeof (i386_regmap[0]))
152 /* Called by libthread_db. */
155 ps_get_thread_area (const struct ps_prochandle
*ph
,
156 lwpid_t lwpid
, int idx
, void **base
)
159 int use_64bit
= register_size (0) == 8;
166 if (ptrace (PTRACE_ARCH_PRCTL
, lwpid
, base
, ARCH_GET_FS
) == 0)
170 if (ptrace (PTRACE_ARCH_PRCTL
, lwpid
, base
, ARCH_GET_GS
) == 0)
181 unsigned int desc
[4];
183 if (ptrace (PTRACE_GET_THREAD_AREA
, lwpid
,
184 (void *) (intptr_t) idx
, (unsigned long) &desc
) < 0)
187 *(int *)base
= desc
[1];
193 i386_cannot_store_register (int regno
)
195 return regno
>= I386_NUM_REGS
;
199 i386_cannot_fetch_register (int regno
)
201 return regno
>= I386_NUM_REGS
;
205 x86_fill_gregset (struct regcache
*regcache
, void *buf
)
210 if (register_size (0) == 8)
212 for (i
= 0; i
< X86_64_NUM_REGS
; i
++)
213 if (x86_64_regmap
[i
] != -1)
214 collect_register (regcache
, i
, ((char *) buf
) + x86_64_regmap
[i
]);
219 for (i
= 0; i
< I386_NUM_REGS
; i
++)
220 collect_register (regcache
, i
, ((char *) buf
) + i386_regmap
[i
]);
222 collect_register_by_name (regcache
, "orig_eax",
223 ((char *) buf
) + ORIG_EAX
* 4);
227 x86_store_gregset (struct regcache
*regcache
, const void *buf
)
232 if (register_size (0) == 8)
234 for (i
= 0; i
< X86_64_NUM_REGS
; i
++)
235 if (x86_64_regmap
[i
] != -1)
236 supply_register (regcache
, i
, ((char *) buf
) + x86_64_regmap
[i
]);
241 for (i
= 0; i
< I386_NUM_REGS
; i
++)
242 supply_register (regcache
, i
, ((char *) buf
) + i386_regmap
[i
]);
244 supply_register_by_name (regcache
, "orig_eax",
245 ((char *) buf
) + ORIG_EAX
* 4);
249 x86_fill_fpregset (struct regcache
*regcache
, void *buf
)
252 i387_cache_to_fxsave (regcache
, buf
);
254 i387_cache_to_fsave (regcache
, buf
);
259 x86_store_fpregset (struct regcache
*regcache
, const void *buf
)
262 i387_fxsave_to_cache (regcache
, buf
);
264 i387_fsave_to_cache (regcache
, buf
);
271 x86_fill_fpxregset (struct regcache
*regcache
, void *buf
)
273 i387_cache_to_fxsave (regcache
, buf
);
277 x86_store_fpxregset (struct regcache
*regcache
, const void *buf
)
279 i387_fxsave_to_cache (regcache
, buf
);
285 x86_fill_xstateregset (struct regcache
*regcache
, void *buf
)
287 i387_cache_to_xsave (regcache
, buf
);
291 x86_store_xstateregset (struct regcache
*regcache
, const void *buf
)
293 i387_xsave_to_cache (regcache
, buf
);
296 /* ??? The non-biarch i386 case stores all the i387 regs twice.
297 Once in i387_.*fsave.* and once in i387_.*fxsave.*.
298 This is, presumably, to handle the case where PTRACE_[GS]ETFPXREGS
299 doesn't work. IWBN to avoid the duplication in the case where it
300 does work. Maybe the arch_setup routine could check whether it works
301 and update target_regsets accordingly, maybe by moving target_regsets
302 to linux_target_ops and set the right one there, rather than having to
303 modify the target_regsets global. */
305 struct regset_info target_regsets
[] =
307 #ifdef HAVE_PTRACE_GETREGS
308 { PTRACE_GETREGS
, PTRACE_SETREGS
, 0, sizeof (elf_gregset_t
),
310 x86_fill_gregset
, x86_store_gregset
},
311 { PTRACE_GETREGSET
, PTRACE_SETREGSET
, NT_X86_XSTATE
, 0,
312 EXTENDED_REGS
, x86_fill_xstateregset
, x86_store_xstateregset
},
314 # ifdef HAVE_PTRACE_GETFPXREGS
315 { PTRACE_GETFPXREGS
, PTRACE_SETFPXREGS
, 0, sizeof (elf_fpxregset_t
),
317 x86_fill_fpxregset
, x86_store_fpxregset
},
320 { PTRACE_GETFPREGS
, PTRACE_SETFPREGS
, 0, sizeof (elf_fpregset_t
),
322 x86_fill_fpregset
, x86_store_fpregset
},
323 #endif /* HAVE_PTRACE_GETREGS */
324 { 0, 0, 0, -1, -1, NULL
, NULL
}
328 x86_get_pc (struct regcache
*regcache
)
330 int use_64bit
= register_size (0) == 8;
335 collect_register_by_name (regcache
, "rip", &pc
);
336 return (CORE_ADDR
) pc
;
341 collect_register_by_name (regcache
, "eip", &pc
);
342 return (CORE_ADDR
) pc
;
347 x86_set_pc (struct regcache
*regcache
, CORE_ADDR pc
)
349 int use_64bit
= register_size (0) == 8;
353 unsigned long newpc
= pc
;
354 supply_register_by_name (regcache
, "rip", &newpc
);
358 unsigned int newpc
= pc
;
359 supply_register_by_name (regcache
, "eip", &newpc
);
363 static const unsigned char x86_breakpoint
[] = { 0xCC };
364 #define x86_breakpoint_len 1
367 x86_breakpoint_at (CORE_ADDR pc
)
371 (*the_target
->read_memory
) (pc
, &c
, 1);
378 /* Support for debug registers. */
381 x86_linux_dr_get (ptid_t ptid
, int regnum
)
386 tid
= ptid_get_lwp (ptid
);
389 value
= ptrace (PTRACE_PEEKUSER
, tid
,
390 offsetof (struct user
, u_debugreg
[regnum
]), 0);
392 error ("Couldn't read debug register");
398 x86_linux_dr_set (ptid_t ptid
, int regnum
, unsigned long value
)
402 tid
= ptid_get_lwp (ptid
);
405 ptrace (PTRACE_POKEUSER
, tid
,
406 offsetof (struct user
, u_debugreg
[regnum
]), value
);
408 error ("Couldn't write debug register");
411 /* Update the inferior's debug register REGNUM from STATE. */
414 i386_dr_low_set_addr (const struct i386_debug_reg_state
*state
, int regnum
)
416 struct inferior_list_entry
*lp
;
418 /* Only need to update the threads of this process. */
419 int pid
= pid_of (get_thread_lwp (current_inferior
));
421 if (! (regnum
>= 0 && regnum
<= DR_LASTADDR
- DR_FIRSTADDR
))
422 fatal ("Invalid debug register %d", regnum
);
424 addr
= state
->dr_mirror
[regnum
];
426 for (lp
= all_lwps
.head
; lp
; lp
= lp
->next
)
428 struct lwp_info
*lwp
= (struct lwp_info
*) lp
;
430 /* The actual update is done later, we just mark that the register
432 if (pid_of (lwp
) == pid
)
433 lwp
->arch_private
->debug_registers_changed
= 1;
437 /* Update the inferior's DR7 debug control register from STATE. */
440 i386_dr_low_set_control (const struct i386_debug_reg_state
*state
)
442 struct inferior_list_entry
*lp
;
443 /* Only need to update the threads of this process. */
444 int pid
= pid_of (get_thread_lwp (current_inferior
));
446 for (lp
= all_lwps
.head
; lp
; lp
= lp
->next
)
448 struct lwp_info
*lwp
= (struct lwp_info
*) lp
;
450 /* The actual update is done later, we just mark that the register
452 if (pid_of (lwp
) == pid
)
453 lwp
->arch_private
->debug_registers_changed
= 1;
457 /* Get the value of the DR6 debug status register from the inferior
458 and record it in STATE. */
461 i386_dr_low_get_status (struct i386_debug_reg_state
*state
)
463 struct lwp_info
*lwp
= get_thread_lwp (current_inferior
);
464 ptid_t ptid
= ptid_of (lwp
);
466 state
->dr_status_mirror
= x86_linux_dr_get (ptid
, DR_STATUS
);
469 /* Watchpoint support. */
472 x86_insert_point (char type
, CORE_ADDR addr
, int len
)
474 struct process_info
*proc
= current_process ();
478 return set_gdb_breakpoint_at (addr
);
482 return i386_low_insert_watchpoint (&proc
->private->arch_private
->debug_reg_state
,
491 x86_remove_point (char type
, CORE_ADDR addr
, int len
)
493 struct process_info
*proc
= current_process ();
497 return delete_gdb_breakpoint_at (addr
);
501 return i386_low_remove_watchpoint (&proc
->private->arch_private
->debug_reg_state
,
510 x86_stopped_by_watchpoint (void)
512 struct process_info
*proc
= current_process ();
513 return i386_low_stopped_by_watchpoint (&proc
->private->arch_private
->debug_reg_state
);
517 x86_stopped_data_address (void)
519 struct process_info
*proc
= current_process ();
521 if (i386_low_stopped_data_address (&proc
->private->arch_private
->debug_reg_state
,
527 /* Called when a new process is created. */
529 static struct arch_process_info
*
530 x86_linux_new_process (void)
532 struct arch_process_info
*info
= xcalloc (1, sizeof (*info
));
534 i386_low_init_dregs (&info
->debug_reg_state
);
539 /* Called when a new thread is detected. */
541 static struct arch_lwp_info
*
542 x86_linux_new_thread (void)
544 struct arch_lwp_info
*info
= xcalloc (1, sizeof (*info
));
546 info
->debug_registers_changed
= 1;
551 /* Called when resuming a thread.
552 If the debug regs have changed, update the thread's copies. */
555 x86_linux_prepare_to_resume (struct lwp_info
*lwp
)
557 ptid_t ptid
= ptid_of (lwp
);
559 if (lwp
->arch_private
->debug_registers_changed
)
562 int pid
= ptid_get_pid (ptid
);
563 struct process_info
*proc
= find_process_pid (pid
);
564 struct i386_debug_reg_state
*state
= &proc
->private->arch_private
->debug_reg_state
;
566 for (i
= DR_FIRSTADDR
; i
<= DR_LASTADDR
; i
++)
567 x86_linux_dr_set (ptid
, i
, state
->dr_mirror
[i
]);
569 x86_linux_dr_set (ptid
, DR_CONTROL
, state
->dr_control_mirror
);
571 lwp
->arch_private
->debug_registers_changed
= 0;
574 if (lwp
->stopped_by_watchpoint
)
575 x86_linux_dr_set (ptid
, DR_STATUS
, 0);
578 /* When GDBSERVER is built as a 64-bit application on linux, the
579 PTRACE_GETSIGINFO data is always presented in 64-bit layout. Since
580 debugging a 32-bit inferior with a 64-bit GDBSERVER should look the same
581 as debugging it with a 32-bit GDBSERVER, we do the 32-bit <-> 64-bit
582 conversion in-place ourselves. */
584 /* These types below (compat_*) define a siginfo type that is layout
585 compatible with the siginfo type exported by the 32-bit userspace
590 typedef int compat_int_t
;
591 typedef unsigned int compat_uptr_t
;
593 typedef int compat_time_t
;
594 typedef int compat_timer_t
;
595 typedef int compat_clock_t
;
597 struct compat_timeval
599 compat_time_t tv_sec
;
603 typedef union compat_sigval
605 compat_int_t sival_int
;
606 compat_uptr_t sival_ptr
;
609 typedef struct compat_siginfo
617 int _pad
[((128 / sizeof (int)) - 3)];
626 /* POSIX.1b timers */
631 compat_sigval_t _sigval
;
634 /* POSIX.1b signals */
639 compat_sigval_t _sigval
;
648 compat_clock_t _utime
;
649 compat_clock_t _stime
;
652 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
667 #define cpt_si_pid _sifields._kill._pid
668 #define cpt_si_uid _sifields._kill._uid
669 #define cpt_si_timerid _sifields._timer._tid
670 #define cpt_si_overrun _sifields._timer._overrun
671 #define cpt_si_status _sifields._sigchld._status
672 #define cpt_si_utime _sifields._sigchld._utime
673 #define cpt_si_stime _sifields._sigchld._stime
674 #define cpt_si_ptr _sifields._rt._sigval.sival_ptr
675 #define cpt_si_addr _sifields._sigfault._addr
676 #define cpt_si_band _sifields._sigpoll._band
677 #define cpt_si_fd _sifields._sigpoll._fd
679 /* glibc at least up to 2.3.2 doesn't have si_timerid, si_overrun.
680 In their place is si_timer1,si_timer2. */
682 #define si_timerid si_timer1
685 #define si_overrun si_timer2
689 compat_siginfo_from_siginfo (compat_siginfo_t
*to
, siginfo_t
*from
)
691 memset (to
, 0, sizeof (*to
));
693 to
->si_signo
= from
->si_signo
;
694 to
->si_errno
= from
->si_errno
;
695 to
->si_code
= from
->si_code
;
699 to
->cpt_si_ptr
= (intptr_t) from
->si_ptr
;
701 else if (to
->si_code
== SI_USER
)
703 to
->cpt_si_pid
= from
->si_pid
;
704 to
->cpt_si_uid
= from
->si_uid
;
706 else if (to
->si_code
== SI_TIMER
)
708 to
->cpt_si_timerid
= from
->si_timerid
;
709 to
->cpt_si_overrun
= from
->si_overrun
;
710 to
->cpt_si_ptr
= (intptr_t) from
->si_ptr
;
714 switch (to
->si_signo
)
717 to
->cpt_si_pid
= from
->si_pid
;
718 to
->cpt_si_uid
= from
->si_uid
;
719 to
->cpt_si_status
= from
->si_status
;
720 to
->cpt_si_utime
= from
->si_utime
;
721 to
->cpt_si_stime
= from
->si_stime
;
727 to
->cpt_si_addr
= (intptr_t) from
->si_addr
;
730 to
->cpt_si_band
= from
->si_band
;
731 to
->cpt_si_fd
= from
->si_fd
;
734 to
->cpt_si_pid
= from
->si_pid
;
735 to
->cpt_si_uid
= from
->si_uid
;
736 to
->cpt_si_ptr
= (intptr_t) from
->si_ptr
;
743 siginfo_from_compat_siginfo (siginfo_t
*to
, compat_siginfo_t
*from
)
745 memset (to
, 0, sizeof (*to
));
747 to
->si_signo
= from
->si_signo
;
748 to
->si_errno
= from
->si_errno
;
749 to
->si_code
= from
->si_code
;
753 to
->si_ptr
= (void *) (intptr_t) from
->cpt_si_ptr
;
755 else if (to
->si_code
== SI_USER
)
757 to
->si_pid
= from
->cpt_si_pid
;
758 to
->si_uid
= from
->cpt_si_uid
;
760 else if (to
->si_code
== SI_TIMER
)
762 to
->si_timerid
= from
->cpt_si_timerid
;
763 to
->si_overrun
= from
->cpt_si_overrun
;
764 to
->si_ptr
= (void *) (intptr_t) from
->cpt_si_ptr
;
768 switch (to
->si_signo
)
771 to
->si_pid
= from
->cpt_si_pid
;
772 to
->si_uid
= from
->cpt_si_uid
;
773 to
->si_status
= from
->cpt_si_status
;
774 to
->si_utime
= from
->cpt_si_utime
;
775 to
->si_stime
= from
->cpt_si_stime
;
781 to
->si_addr
= (void *) (intptr_t) from
->cpt_si_addr
;
784 to
->si_band
= from
->cpt_si_band
;
785 to
->si_fd
= from
->cpt_si_fd
;
788 to
->si_pid
= from
->cpt_si_pid
;
789 to
->si_uid
= from
->cpt_si_uid
;
790 to
->si_ptr
= (void* ) (intptr_t) from
->cpt_si_ptr
;
796 #endif /* __x86_64__ */
798 /* Convert a native/host siginfo object, into/from the siginfo in the
799 layout of the inferiors' architecture. Returns true if any
800 conversion was done; false otherwise. If DIRECTION is 1, then copy
801 from INF to NATIVE. If DIRECTION is 0, copy from NATIVE to
805 x86_siginfo_fixup (struct siginfo
*native
, void *inf
, int direction
)
808 /* Is the inferior 32-bit? If so, then fixup the siginfo object. */
809 if (register_size (0) == 4)
811 if (sizeof (struct siginfo
) != sizeof (compat_siginfo_t
))
812 fatal ("unexpected difference in siginfo");
815 compat_siginfo_from_siginfo ((struct compat_siginfo
*) inf
, native
);
817 siginfo_from_compat_siginfo (native
, (struct compat_siginfo
*) inf
);
828 /* Update gdbserver_xmltarget. */
831 x86_linux_update_xmltarget (void)
834 struct regset_info
*regset
;
835 static unsigned long long xcr0
;
836 static int have_ptrace_getregset
= -1;
837 #if !defined(__x86_64__) && defined(HAVE_PTRACE_GETFPXREGS)
838 static int have_ptrace_getfpxregs
= -1;
841 if (!current_inferior
)
844 /* Before changing the register cache internal layout or the target
845 regsets, flush the contents of the current valid caches back to
847 regcache_invalidate ();
849 pid
= pid_of (get_thread_lwp (current_inferior
));
851 if (num_xmm_registers
== 8)
852 init_registers_i386_linux ();
854 init_registers_amd64_linux ();
857 # ifdef HAVE_PTRACE_GETFPXREGS
858 if (have_ptrace_getfpxregs
== -1)
860 elf_fpxregset_t fpxregs
;
862 if (ptrace (PTRACE_GETFPXREGS
, pid
, 0, (int) &fpxregs
) < 0)
864 have_ptrace_getfpxregs
= 0;
865 x86_xcr0
= I386_XSTATE_X87_MASK
;
867 /* Disable PTRACE_GETFPXREGS. */
868 for (regset
= target_regsets
;
869 regset
->fill_function
!= NULL
; regset
++)
870 if (regset
->get_request
== PTRACE_GETFPXREGS
)
877 have_ptrace_getfpxregs
= 1;
880 if (!have_ptrace_getfpxregs
)
882 init_registers_i386_mmx_linux ();
886 init_registers_i386_linux ();
894 if (num_xmm_registers
== 8)
895 gdbserver_xmltarget
= xmltarget_i386_linux_no_xml
;
897 gdbserver_xmltarget
= xmltarget_amd64_linux_no_xml
;
899 gdbserver_xmltarget
= xmltarget_i386_linux_no_xml
;
902 x86_xcr0
= I386_XSTATE_SSE_MASK
;
907 /* Check if XSAVE extended state is supported. */
908 if (have_ptrace_getregset
== -1)
910 unsigned long long xstateregs
[I386_XSTATE_SSE_SIZE
/ sizeof (long long)];
913 iov
.iov_base
= xstateregs
;
914 iov
.iov_len
= sizeof (xstateregs
);
916 /* Check if PTRACE_GETREGSET works. */
917 if (ptrace (PTRACE_GETREGSET
, pid
, (unsigned int) NT_X86_XSTATE
,
920 have_ptrace_getregset
= 0;
924 have_ptrace_getregset
= 1;
926 /* Get XCR0 from XSAVE extended state at byte 464. */
927 xcr0
= xstateregs
[464 / sizeof (long long)];
929 /* Use PTRACE_GETREGSET if it is available. */
930 for (regset
= target_regsets
;
931 regset
->fill_function
!= NULL
; regset
++)
932 if (regset
->get_request
== PTRACE_GETREGSET
)
933 regset
->size
= I386_XSTATE_SIZE (xcr0
);
934 else if (regset
->type
!= GENERAL_REGS
)
938 if (have_ptrace_getregset
)
940 /* AVX is the highest feature we support. */
941 if ((xcr0
& I386_XSTATE_AVX_MASK
) == I386_XSTATE_AVX_MASK
)
946 /* I386 has 8 xmm regs. */
947 if (num_xmm_registers
== 8)
948 init_registers_i386_avx_linux ();
950 init_registers_amd64_avx_linux ();
952 init_registers_i386_avx_linux ();
958 /* Process qSupported query, "xmlRegisters=". Update the buffer size for
962 x86_linux_process_qsupported (const char *query
)
964 /* Return if gdb doesn't support XML. If gdb sends "xmlRegisters="
965 with "i386" in qSupported query, it supports x86 XML target
968 if (query
!= NULL
&& strncmp (query
, "xmlRegisters=", 13) == 0)
970 char *copy
= xstrdup (query
+ 13);
973 for (p
= strtok (copy
, ","); p
!= NULL
; p
= strtok (NULL
, ","))
975 if (strcmp (p
, "i386") == 0)
985 x86_linux_update_xmltarget ();
988 /* Initialize gdbserver for the architecture of the inferior. */
991 x86_arch_setup (void)
994 int pid
= pid_of (get_thread_lwp (current_inferior
));
995 char *file
= linux_child_pid_to_exec_file (pid
);
996 int use_64bit
= elf_64_file_p (file
);
1002 /* This can only happen if /proc/<pid>/exe is unreadable,
1003 but "that can't happen" if we've gotten this far.
1004 Fall through and assume this is a 32-bit program. */
1008 /* Amd64 doesn't have HAVE_LINUX_USRREGS. */
1009 the_low_target
.num_regs
= -1;
1010 the_low_target
.regmap
= NULL
;
1011 the_low_target
.cannot_fetch_register
= NULL
;
1012 the_low_target
.cannot_store_register
= NULL
;
1014 /* Amd64 has 16 xmm regs. */
1015 num_xmm_registers
= 16;
1017 x86_linux_update_xmltarget ();
1022 /* Ok we have a 32-bit inferior. */
1024 the_low_target
.num_regs
= I386_NUM_REGS
;
1025 the_low_target
.regmap
= i386_regmap
;
1026 the_low_target
.cannot_fetch_register
= i386_cannot_fetch_register
;
1027 the_low_target
.cannot_store_register
= i386_cannot_store_register
;
1029 /* I386 has 8 xmm regs. */
1030 num_xmm_registers
= 8;
1032 x86_linux_update_xmltarget ();
1036 x86_supports_tracepoints (void)
1041 /* This is initialized assuming an amd64 target.
1042 x86_arch_setup will correct it for i386 or amd64 targets. */
1044 struct linux_target_ops the_low_target
=
1060 x86_stopped_by_watchpoint
,
1061 x86_stopped_data_address
,
1062 /* collect_ptrace_register/supply_ptrace_register are not needed in the
1063 native i386 case (no registers smaller than an xfer unit), and are not
1064 used in the biarch case (HAVE_LINUX_USRREGS is not defined). */
1067 /* need to fix up i386 siginfo if host is amd64 */
1069 x86_linux_new_process
,
1070 x86_linux_new_thread
,
1071 x86_linux_prepare_to_resume
,
1072 x86_linux_process_qsupported
,
1073 x86_supports_tracepoints