1 /* Copyright (C) 2020 Free Software Foundation, Inc.
2 
3    This file is part of GDB.
4 
5    This program is free software; you can redistribute it and/or modify
6    it under the terms of the GNU General Public License as published by
7    the Free Software Foundation; either version 3 of the License, or
8    (at your option) any later version.
9 
10    This program is distributed in the hope that it will be useful,
11    but WITHOUT ANY WARRANTY; without even the implied warranty of
12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13    GNU General Public License for more details.
14 
15    You should have received a copy of the GNU General Public License
16    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
17 
18 #include <sys/types.h>
19 #include <sys/ptrace.h>
20 #include <limits.h>
21 
22 #include "server.h"
23 #include "netbsd-low.h"
24 #include "gdbsupport/x86-xstate.h"
25 #include "arch/amd64.h"
26 #include "x86-tdesc.h"
27 #include "tdesc.h"
28 
29 /* The index of various registers inside the regcache.  */
30 
31 enum netbsd_x86_64_gdb_regnum
32 {
33   AMD64_RAX_REGNUM,	     /* %rax */
34   AMD64_RBX_REGNUM,	     /* %rbx */
35   AMD64_RCX_REGNUM,	     /* %rcx */
36   AMD64_RDX_REGNUM,	     /* %rdx */
37   AMD64_RSI_REGNUM,	     /* %rsi */
38   AMD64_RDI_REGNUM,	     /* %rdi */
39   AMD64_RBP_REGNUM,	     /* %rbp */
40   AMD64_RSP_REGNUM,	     /* %rsp */
41   AMD64_R8_REGNUM,	      /* %r8 */
42   AMD64_R9_REGNUM,	      /* %r9 */
43   AMD64_R10_REGNUM,	     /* %r10 */
44   AMD64_R11_REGNUM,	     /* %r11 */
45   AMD64_R12_REGNUM,	     /* %r12 */
46   AMD64_R13_REGNUM,	     /* %r13 */
47   AMD64_R14_REGNUM,	     /* %r14 */
48   AMD64_R15_REGNUM,	     /* %r15 */
49   AMD64_RIP_REGNUM,	     /* %rip */
50   AMD64_EFLAGS_REGNUM,	  /* %eflags */
51   AMD64_CS_REGNUM,	      /* %cs */
52   AMD64_SS_REGNUM,	      /* %ss */
53   AMD64_DS_REGNUM,	      /* %ds */
54   AMD64_ES_REGNUM,	      /* %es */
55   AMD64_FS_REGNUM,	      /* %fs */
56   AMD64_GS_REGNUM,	      /* %gs */
57   AMD64_ST0_REGNUM = 24,     /* %st0 */
58   AMD64_ST1_REGNUM,	     /* %st1 */
59   AMD64_FCTRL_REGNUM = AMD64_ST0_REGNUM + 8,
60   AMD64_FSTAT_REGNUM = AMD64_ST0_REGNUM + 9,
61   AMD64_FTAG_REGNUM = AMD64_ST0_REGNUM + 10,
62   AMD64_XMM0_REGNUM = 40,   /* %xmm0 */
63   AMD64_XMM1_REGNUM,	    /* %xmm1 */
64   AMD64_MXCSR_REGNUM = AMD64_XMM0_REGNUM + 16,
65   AMD64_YMM0H_REGNUM,	   /* %ymm0h */
66   AMD64_YMM15H_REGNUM = AMD64_YMM0H_REGNUM + 15,
67   AMD64_BND0R_REGNUM = AMD64_YMM15H_REGNUM + 1,
68   AMD64_BND3R_REGNUM = AMD64_BND0R_REGNUM + 3,
69   AMD64_BNDCFGU_REGNUM,
70   AMD64_BNDSTATUS_REGNUM,
71   AMD64_XMM16_REGNUM,
72   AMD64_XMM31_REGNUM = AMD64_XMM16_REGNUM + 15,
73   AMD64_YMM16H_REGNUM,
74   AMD64_YMM31H_REGNUM = AMD64_YMM16H_REGNUM + 15,
75   AMD64_K0_REGNUM,
76   AMD64_K7_REGNUM = AMD64_K0_REGNUM + 7,
77   AMD64_ZMM0H_REGNUM,
78   AMD64_ZMM31H_REGNUM = AMD64_ZMM0H_REGNUM + 31,
79   AMD64_PKRU_REGNUM,
80   AMD64_FSBASE_REGNUM,
81   AMD64_GSBASE_REGNUM
82 };
83 
84 /* The fill_function for the general-purpose register set.  */
85 
86 static void
netbsd_x86_64_fill_gregset(struct regcache * regcache,char * buf)87 netbsd_x86_64_fill_gregset (struct regcache *regcache, char *buf)
88 {
89   struct reg *r = (struct reg *) buf;
90 
91 #define netbsd_x86_64_collect_gp(regnum, fld) do {		\
92     collect_register (regcache, regnum, &r->regs[_REG_##fld]);	\
93   } while (0)
94 
95   netbsd_x86_64_collect_gp (AMD64_RAX_REGNUM, RAX);
96   netbsd_x86_64_collect_gp (AMD64_RBX_REGNUM, RBX);
97   netbsd_x86_64_collect_gp (AMD64_RCX_REGNUM, RCX);
98   netbsd_x86_64_collect_gp (AMD64_RDX_REGNUM, RDX);
99   netbsd_x86_64_collect_gp (AMD64_RSI_REGNUM, RSI);
100   netbsd_x86_64_collect_gp (AMD64_RDI_REGNUM, RDI);
101   netbsd_x86_64_collect_gp (AMD64_RBP_REGNUM, RBP);
102   netbsd_x86_64_collect_gp (AMD64_RSP_REGNUM, RSP);
103   netbsd_x86_64_collect_gp (AMD64_R8_REGNUM, R8);
104   netbsd_x86_64_collect_gp (AMD64_R9_REGNUM, R9);
105   netbsd_x86_64_collect_gp (AMD64_R10_REGNUM, R10);
106   netbsd_x86_64_collect_gp (AMD64_R11_REGNUM, R11);
107   netbsd_x86_64_collect_gp (AMD64_R12_REGNUM, R12);
108   netbsd_x86_64_collect_gp (AMD64_R13_REGNUM, R13);
109   netbsd_x86_64_collect_gp (AMD64_R14_REGNUM, R14);
110   netbsd_x86_64_collect_gp (AMD64_R15_REGNUM, R15);
111   netbsd_x86_64_collect_gp (AMD64_RIP_REGNUM, RIP);
112   netbsd_x86_64_collect_gp (AMD64_EFLAGS_REGNUM, RFLAGS);
113   netbsd_x86_64_collect_gp (AMD64_CS_REGNUM, CS);
114   netbsd_x86_64_collect_gp (AMD64_SS_REGNUM, SS);
115   netbsd_x86_64_collect_gp (AMD64_DS_REGNUM, DS);
116   netbsd_x86_64_collect_gp (AMD64_ES_REGNUM, ES);
117   netbsd_x86_64_collect_gp (AMD64_FS_REGNUM, FS);
118   netbsd_x86_64_collect_gp (AMD64_GS_REGNUM, GS);
119 }
120 
121 /* The store_function for the general-purpose register set.  */
122 
123 static void
netbsd_x86_64_store_gregset(struct regcache * regcache,const char * buf)124 netbsd_x86_64_store_gregset (struct regcache *regcache, const char *buf)
125 {
126   struct reg *r = (struct reg *) buf;
127 
128 #define netbsd_x86_64_supply_gp(regnum, fld) do {		\
129     supply_register (regcache, regnum, &r->regs[_REG_##fld]);	\
130   } while(0)
131 
132   netbsd_x86_64_supply_gp (AMD64_RAX_REGNUM, RAX);
133   netbsd_x86_64_supply_gp (AMD64_RBX_REGNUM, RBX);
134   netbsd_x86_64_supply_gp (AMD64_RCX_REGNUM, RCX);
135   netbsd_x86_64_supply_gp (AMD64_RDX_REGNUM, RDX);
136   netbsd_x86_64_supply_gp (AMD64_RSI_REGNUM, RSI);
137   netbsd_x86_64_supply_gp (AMD64_RDI_REGNUM, RDI);
138   netbsd_x86_64_supply_gp (AMD64_RBP_REGNUM, RBP);
139   netbsd_x86_64_supply_gp (AMD64_RSP_REGNUM, RSP);
140   netbsd_x86_64_supply_gp (AMD64_R8_REGNUM, R8);
141   netbsd_x86_64_supply_gp (AMD64_R9_REGNUM, R9);
142   netbsd_x86_64_supply_gp (AMD64_R10_REGNUM, R10);
143   netbsd_x86_64_supply_gp (AMD64_R11_REGNUM, R11);
144   netbsd_x86_64_supply_gp (AMD64_R12_REGNUM, R12);
145   netbsd_x86_64_supply_gp (AMD64_R13_REGNUM, R13);
146   netbsd_x86_64_supply_gp (AMD64_R14_REGNUM, R14);
147   netbsd_x86_64_supply_gp (AMD64_R15_REGNUM, R15);
148   netbsd_x86_64_supply_gp (AMD64_RIP_REGNUM, RIP);
149   netbsd_x86_64_supply_gp (AMD64_EFLAGS_REGNUM, RFLAGS);
150   netbsd_x86_64_supply_gp (AMD64_CS_REGNUM, CS);
151   netbsd_x86_64_supply_gp (AMD64_SS_REGNUM, SS);
152   netbsd_x86_64_supply_gp (AMD64_DS_REGNUM, DS);
153   netbsd_x86_64_supply_gp (AMD64_ES_REGNUM, ES);
154   netbsd_x86_64_supply_gp (AMD64_FS_REGNUM, FS);
155   netbsd_x86_64_supply_gp (AMD64_GS_REGNUM, GS);
156 }
157 
158 /* Implements the netbsd_target_ops.arch_setup routine.  */
159 
160 static void
netbsd_x86_64_arch_setup(void)161 netbsd_x86_64_arch_setup (void)
162 {
163   struct target_desc *tdesc
164     = amd64_create_target_description (X86_XSTATE_SSE_MASK, false, false, false);
165 
166   init_target_desc (tdesc, amd64_expedite_regs);
167 
168   netbsd_tdesc = tdesc;
169 }
170 
171 /* Description of all the x86-netbsd register sets.  */
172 
173 struct netbsd_regset_info netbsd_target_regsets[] =
174 {
175  /* General Purpose Registers.  */
176  {PT_GETREGS, PT_SETREGS, sizeof (struct reg),
177   netbsd_x86_64_fill_gregset, netbsd_x86_64_store_gregset},
178  /* End of list marker.  */
179  {0, 0, -1, NULL, NULL }
180 };
181 
182 /* The netbsd_target_ops vector for x86-netbsd.  */
183 
184 struct netbsd_target_ops the_low_target =
185 {
186  netbsd_x86_64_arch_setup,
187 };
188