1 /* GNU/Linux/x86-64 specific target description, for the remote server
3 Copyright (C) 2017-2018 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 #include "linux-x86-tdesc.h"
23 #include "arch/i386.h"
24 #include "common/x86-xstate.h"
26 #include "arch/amd64.h"
29 /* Return the right x86_linux_tdesc index for a given XCR0. Return
30 X86_TDESC_LAST if can't find a match. */
32 static enum x86_linux_tdesc
33 xcr0_to_tdesc_idx (uint64_t xcr0
, bool is_x32
)
35 if (xcr0
& X86_XSTATE_PKRU
)
39 /* No x32 MPX and PKU, fall back to avx_avx512. */
40 return X86_TDESC_AVX_AVX512
;
43 return X86_TDESC_AVX_MPX_AVX512_PKU
;
45 else if (xcr0
& X86_XSTATE_AVX512
)
46 return X86_TDESC_AVX_AVX512
;
47 else if ((xcr0
& X86_XSTATE_AVX_MPX_MASK
) == X86_XSTATE_AVX_MPX_MASK
)
49 if (is_x32
) /* No MPX on x32. */
52 return X86_TDESC_AVX_MPX
;
54 else if (xcr0
& X86_XSTATE_MPX
)
56 if (is_x32
) /* No MPX on x32. */
61 else if (xcr0
& X86_XSTATE_AVX
)
63 else if (xcr0
& X86_XSTATE_SSE
)
65 else if (xcr0
& X86_XSTATE_X87
)
68 return X86_TDESC_LAST
;
71 static struct target_desc
*i386_tdescs
[X86_TDESC_LAST
] = { };
73 #if defined __i386__ || !defined IN_PROCESS_AGENT
75 /* Return the target description according to XCR0. */
77 const struct target_desc
*
78 i386_linux_read_description (uint64_t xcr0
)
80 enum x86_linux_tdesc idx
= xcr0_to_tdesc_idx (xcr0
, false);
82 if (idx
== X86_TDESC_LAST
)
85 struct target_desc
**tdesc
= &i386_tdescs
[idx
];
89 *tdesc
= i386_create_target_description (xcr0
, true);
91 init_target_desc (*tdesc
);
93 #ifndef IN_PROCESS_AGENT
94 static const char *expedite_regs_i386
[] = { "ebp", "esp", "eip", NULL
};
95 (*tdesc
)->expedite_regs
= expedite_regs_i386
;
105 static target_desc
*amd64_tdescs
[X86_TDESC_LAST
] = { };
106 static target_desc
*x32_tdescs
[X86_TDESC_LAST
] = { };
108 const struct target_desc
*
109 amd64_linux_read_description (uint64_t xcr0
, bool is_x32
)
111 enum x86_linux_tdesc idx
= xcr0_to_tdesc_idx (xcr0
, is_x32
);
113 if (idx
== X86_TDESC_LAST
)
116 struct target_desc
**tdesc
= NULL
;
119 tdesc
= &x32_tdescs
[idx
];
121 tdesc
= &amd64_tdescs
[idx
];
125 *tdesc
= amd64_create_target_description (xcr0
, is_x32
, true);
127 init_target_desc (*tdesc
);
129 #ifndef IN_PROCESS_AGENT
130 static const char *expedite_regs_amd64
[] = { "rbp", "rsp", "rip", NULL
};
131 (*tdesc
)->expedite_regs
= expedite_regs_amd64
;
139 #ifndef IN_PROCESS_AGENT
142 i386_get_ipa_tdesc_idx (const struct target_desc
*tdesc
)
144 for (int i
= 0; i
< X86_TDESC_LAST
; i
++)
146 if (tdesc
== i386_tdescs
[i
])
150 /* If none tdesc is found, return the one with minimum features. */
151 return X86_TDESC_MMX
;
154 #if defined __x86_64__
156 amd64_get_ipa_tdesc_idx (const struct target_desc
*tdesc
)
158 for (int i
= 0; i
< X86_TDESC_LAST
; i
++)
160 if (tdesc
== amd64_tdescs
[i
])
163 for (int i
= 0; i
< X86_TDESC_LAST
; i
++)
165 if (tdesc
== x32_tdescs
[i
])
169 return X86_TDESC_SSE
;