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"
28 #include "x86-tdesc.h"
30 /* Return the right x86_linux_tdesc index for a given XCR0. Return
31 X86_TDESC_LAST if can't find a match. */
33 static enum x86_linux_tdesc
34 xcr0_to_tdesc_idx (uint64_t xcr0, bool is_x32)
36 if (xcr0 & X86_XSTATE_PKRU)
40 /* No x32 MPX and PKU, fall back to avx_avx512. */
41 return X86_TDESC_AVX_AVX512;
44 return X86_TDESC_AVX_MPX_AVX512_PKU;
46 else if (xcr0 & X86_XSTATE_AVX512)
47 return X86_TDESC_AVX_AVX512;
48 else if ((xcr0 & X86_XSTATE_AVX_MPX_MASK) == X86_XSTATE_AVX_MPX_MASK)
50 if (is_x32) /* No MPX on x32. */
53 return X86_TDESC_AVX_MPX;
55 else if (xcr0 & X86_XSTATE_MPX)
57 if (is_x32) /* No MPX on x32. */
62 else if (xcr0 & X86_XSTATE_AVX)
64 else if (xcr0 & X86_XSTATE_SSE)
66 else if (xcr0 & X86_XSTATE_X87)
69 return X86_TDESC_LAST;
72 static struct target_desc *i386_tdescs[X86_TDESC_LAST] = { };
74 #if defined __i386__ || !defined IN_PROCESS_AGENT
76 /* Return the target description according to XCR0. */
78 const struct target_desc *
79 i386_linux_read_description (uint64_t xcr0)
81 enum x86_linux_tdesc idx = xcr0_to_tdesc_idx (xcr0, false);
83 if (idx == X86_TDESC_LAST)
86 struct target_desc **tdesc = &i386_tdescs[idx];
90 *tdesc = i386_create_target_description (xcr0, true);
92 init_target_desc (*tdesc, i386_expedite_regs);
101 static target_desc *amd64_tdescs[X86_TDESC_LAST] = { };
102 static target_desc *x32_tdescs[X86_TDESC_LAST] = { };
104 const struct target_desc *
105 amd64_linux_read_description (uint64_t xcr0, bool is_x32)
107 enum x86_linux_tdesc idx = xcr0_to_tdesc_idx (xcr0, is_x32);
109 if (idx == X86_TDESC_LAST)
112 struct target_desc **tdesc = NULL;
115 tdesc = &x32_tdescs[idx];
117 tdesc = &amd64_tdescs[idx];
121 *tdesc = amd64_create_target_description (xcr0, is_x32, true);
123 init_target_desc (*tdesc, amd64_expedite_regs);
130 #ifndef IN_PROCESS_AGENT
133 i386_get_ipa_tdesc_idx (const struct target_desc *tdesc)
135 for (int i = 0; i < X86_TDESC_LAST; i++)
137 if (tdesc == i386_tdescs[i])
141 /* If none tdesc is found, return the one with minimum features. */
142 return X86_TDESC_MMX;
145 #if defined __x86_64__
147 amd64_get_ipa_tdesc_idx (const struct target_desc *tdesc)
149 for (int i = 0; i < X86_TDESC_LAST; i++)
151 if (tdesc == amd64_tdescs[i])
154 for (int i = 0; i < X86_TDESC_LAST; i++)
156 if (tdesc == x32_tdescs[i])
160 return X86_TDESC_SSE;