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i387-tdep.h
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1/* Target-dependent code for the i387.
2
3 Copyright (C) 2000-2023 Free Software Foundation, Inc.
4
5 This file is part of GDB.
6
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.
11
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.
16
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/>. */
19
20#ifndef I387_TDEP_H
21#define I387_TDEP_H
22
23struct gdbarch;
24class frame_info_ptr;
25struct regcache;
26struct type;
27struct ui_file;
28struct x86_xsave_layout;
29
30/* Number of i387 floating point registers. */
31#define I387_NUM_REGS 16
32
33#define I387_ST0_REGNUM(tdep) ((tdep)->st0_regnum)
34#define I387_NUM_XMM_REGS(tdep) ((tdep)->num_xmm_regs)
35#define I387_NUM_XMM_AVX512_REGS(tdep) ((tdep)->num_xmm_avx512_regs)
36#define I387_MM0_REGNUM(tdep) ((tdep)->mm0_regnum)
37#define I387_NUM_YMM_REGS(tdep) ((tdep)->num_ymm_regs)
38#define I387_YMM0H_REGNUM(tdep) ((tdep)->ymm0h_regnum)
39
40#define I387_BND0R_REGNUM(tdep) ((tdep)->bnd0r_regnum)
41#define I387_BNDCFGU_REGNUM(tdep) ((tdep)->bndcfgu_regnum)
42
43/* Set of constants used for 32 and 64-bit. */
44#define I387_NUM_MPX_REGS 6
45#define I387_NUM_BND_REGS 4
46#define I387_NUM_MPX_CTRL_REGS 2
47#define I387_NUM_K_REGS 8
48#define I387_NUM_PKEYS_REGS 1
49
50#define I387_PKRU_REGNUM(tdep) ((tdep)->pkru_regnum)
51#define I387_K0_REGNUM(tdep) ((tdep)->k0_regnum)
52#define I387_NUM_ZMMH_REGS(tdep) ((tdep)->num_zmm_regs)
53#define I387_ZMM0H_REGNUM(tdep) ((tdep)->zmm0h_regnum)
54#define I387_ZMM16H_REGNUM(tdep) ((tdep)->zmm0h_regnum + 16)
55#define I387_NUM_YMM_AVX512_REGS(tdep) ((tdep)->num_ymm_avx512_regs)
56#define I387_YMM16H_REGNUM(tdep) ((tdep)->ymm16h_regnum)
57
58#define I387_FCTRL_REGNUM(tdep) (I387_ST0_REGNUM (tdep) + 8)
59#define I387_FSTAT_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 1)
60#define I387_FTAG_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 2)
61#define I387_FISEG_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 3)
62#define I387_FIOFF_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 4)
63#define I387_FOSEG_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 5)
64#define I387_FOOFF_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 6)
65#define I387_FOP_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 7)
66#define I387_XMM0_REGNUM(tdep) (I387_ST0_REGNUM (tdep) + 16)
67#define I387_XMM16_REGNUM(tdep) ((tdep)->xmm16_regnum)
68#define I387_MXCSR_REGNUM(tdep) \
69 (I387_XMM0_REGNUM (tdep) + I387_NUM_XMM_REGS (tdep))
70#define I387_YMM0_REGNUM(tdep) (I387_MXCSR_REGNUM(tdep) + 1)
71#define I387_YMMENDH_REGNUM(tdep) \
72 (I387_YMM0H_REGNUM (tdep) + I387_NUM_YMM_REGS (tdep))
73
74#define I387_MPXEND_REGNUM(tdep) \
75 (I387_BND0R_REGNUM (tdep) + I387_NUM_MPX_REGS)
76
77#define I387_KEND_REGNUM(tdep) \
78 (I387_K0_REGNUM (tdep) + I387_NUM_K_REGS)
79#define I387_ZMMENDH_REGNUM(tdep) \
80 (I387_ZMM0H_REGNUM (tdep) + I387_NUM_ZMMH_REGS (tdep))
81#define I387_YMMH_AVX512_END_REGNUM(tdep) \
82 (I387_YMM16H_REGNUM (tdep) + I387_NUM_YMM_AVX512_REGS (tdep))
83#define I387_XMM_AVX512_END_REGNUM(tdep) \
84 (I387_XMM16_REGNUM (tdep) + I387_NUM_XMM_AVX512_REGS (tdep))
85
86#define I387_PKEYSEND_REGNUM(tdep) \
87 (I387_PKRU_REGNUM (tdep) + I387_NUM_PKEYS_REGS)
88
89/* Print out the i387 floating point state. */
90
91extern void i387_print_float_info (struct gdbarch *gdbarch,
92 struct ui_file *file,
93 frame_info_ptr frame,
94 const char *args);
95
96/* Return nonzero if a value of type TYPE stored in register REGNUM
97 needs any special handling. */
98
99extern int i387_convert_register_p (struct gdbarch *gdbarch, int regnum,
100 struct type *type);
101
102/* Read a value of type TYPE from register REGNUM in frame FRAME, and
103 return its contents in TO. */
104
105extern int i387_register_to_value (frame_info_ptr frame, int regnum,
106 struct type *type, gdb_byte *to,
107 int *optimizedp, int *unavailablep);
108
109/* Write the contents FROM of a value of type TYPE into register
110 REGNUM in frame FRAME. */
111
112extern void i387_value_to_register (frame_info_ptr frame, int regnum,
113 struct type *type, const gdb_byte *from);
114
115
116/* Size of the memory area use by the 'fsave' and 'fxsave'
117 instructions. */
118#define I387_SIZEOF_FSAVE 108
119#define I387_SIZEOF_FXSAVE 512
120
121/* Fill register REGNUM in REGCACHE with the appropriate value from
122 *FSAVE. This function masks off any of the reserved bits in
123 *FSAVE. */
124
125extern void i387_supply_fsave (struct regcache *regcache, int regnum,
126 const void *fsave);
127
128/* Fill register REGNUM (if it is a floating-point register) in *FSAVE
129 with the value from REGCACHE. If REGNUM is -1, do this for all
130 registers. This function doesn't touch any of the reserved bits in
131 *FSAVE. */
132
133extern void i387_collect_fsave (const struct regcache *regcache, int regnum,
134 void *fsave);
135
136/* Fill register REGNUM in REGCACHE with the appropriate
137 floating-point or SSE register value from *FXSAVE. This function
138 masks off any of the reserved bits in *FXSAVE. */
139
140extern void i387_supply_fxsave (struct regcache *regcache, int regnum,
141 const void *fxsave);
142
143/* Select an XSAVE layout based on the XCR0 bitmask and total XSAVE
144 extended state size. Returns true if the bitmask and size matched
145 a known layout. */
146
147extern bool i387_guess_xsave_layout (uint64_t xcr0, size_t xsave_size,
148 x86_xsave_layout &layout);
149
150/* Compute an XSAVE layout based on the XCR0 bitmask. This is used
151 as a fallback if a target does not provide an XSAVE layout. */
152
153extern x86_xsave_layout i387_fallback_xsave_layout (uint64_t xcr0);
154
155/* Similar to i387_supply_fxsave, but use XSAVE extended state. */
156
157extern void i387_supply_xsave (struct regcache *regcache, int regnum,
158 const void *xsave);
159
160/* Fill register REGNUM (if it is a floating-point or SSE register) in
161 *FXSAVE with the value from REGCACHE. If REGNUM is -1, do this for
162 all registers. This function doesn't touch any of the reserved
163 bits in *FXSAVE. */
164
165extern void i387_collect_fxsave (const struct regcache *regcache, int regnum,
166 void *fxsave);
167
168/* Similar to i387_collect_fxsave, but use XSAVE extended state. */
169
170extern void i387_collect_xsave (const struct regcache *regcache,
171 int regnum, void *xsave, int gcore);
172
173/* Extract a bitset from XSAVE indicating which features are available in
174 the inferior, but not yet initialised. */
175
176extern ULONGEST i387_xsave_get_clear_bv (struct gdbarch *gdbarch,
177 const void *xsave);
178
179/* Prepare the FPU stack in REGCACHE for a function return. */
180
181extern void i387_return_value (struct gdbarch *gdbarch,
182 struct regcache *regcache);
183
184/* Set all bnd registers to the INIT state. INIT state means
185 all memory range can be accessed. */
186extern void i387_reset_bnd_regs (struct gdbarch *gdbarch,
187 struct regcache *regcache);
188#endif /* i387-tdep.h */
int regnum
void i387_value_to_register(frame_info_ptr frame, int regnum, struct type *type, const gdb_byte *from)
Definition i387-tdep.c:383
ULONGEST i387_xsave_get_clear_bv(struct gdbarch *gdbarch, const void *xsave)
Definition i387-tdep.c:1042
void i387_supply_xsave(struct regcache *regcache, int regnum, const void *xsave)
Definition i387-tdep.c:1061
bool i387_guess_xsave_layout(uint64_t xcr0, size_t xsave_size, x86_xsave_layout &layout)
Definition i387-tdep.c:938
void i387_supply_fxsave(struct regcache *regcache, int regnum, const void *fxsave)
Definition i387-tdep.c:589
x86_xsave_layout i387_fallback_xsave_layout(uint64_t xcr0)
Definition i387-tdep.c:993
void i387_collect_fxsave(const struct regcache *regcache, int regnum, void *fxsave)
Definition i387-tdep.c:673
void i387_collect_xsave(const struct regcache *regcache, int regnum, void *xsave, int gcore)
Definition i387-tdep.c:1508
void i387_reset_bnd_regs(struct gdbarch *gdbarch, struct regcache *regcache)
Definition i387-tdep.c:2147
int i387_convert_register_p(struct gdbarch *gdbarch, int regnum, struct type *type)
Definition i387-tdep.c:327
void i387_supply_fsave(struct regcache *regcache, int regnum, const void *fsave)
Definition i387-tdep.c:440
void i387_collect_fsave(const struct regcache *regcache, int regnum, void *fsave)
Definition i387-tdep.c:495
void i387_return_value(struct gdbarch *gdbarch, struct regcache *regcache)
Definition i387-tdep.c:2124
int i387_register_to_value(frame_info_ptr frame, int regnum, struct type *type, gdb_byte *to, int *optimizedp, int *unavailablep)
Definition i387-tdep.c:348
void i387_print_float_info(struct gdbarch *gdbarch, struct ui_file *file, frame_info_ptr frame, const char *args)
Definition i387-tdep.c:204