[deliverable/binutils-gdb.git] / gdb / gdbserver / lynx-i386-low.c

/* Copyright (C) 2010-2013 Free Software Foundation, Inc.

   This file is part of GDB.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

#include "server.h"
#include "lynx-low.h"

#include <stdint.h>
#include <limits.h>
#include <sys/ptrace.h>

/* The following two typedefs are defined in a .h file which is not
   in the standard include path (/sys/include/family/x86/ucontext.h),
   so we just duplicate them here.  */

/* General register context */
typedef struct usr_econtext {

    uint32_t    uec_fault;
    uint32_t    uec_es;
    uint32_t    uec_ds;
    uint32_t    uec_edi;
    uint32_t    uec_esi;
    uint32_t    uec_ebp;
    uint32_t    uec_temp;
    uint32_t    uec_ebx;
    uint32_t    uec_edx;
    uint32_t    uec_ecx;
    uint32_t    uec_eax;
    uint32_t    uec_inum;
    uint32_t    uec_ecode;
    uint32_t    uec_eip;
    uint32_t    uec_cs;
    uint32_t    uec_eflags;
    uint32_t    uec_esp;
    uint32_t    uec_ss;
    uint32_t    uec_fs;
    uint32_t    uec_gs;
} usr_econtext_t;

/* Floating point and SIMD register context */
typedef struct usr_fcontext {
        uint16_t         ufc_control;
        uint16_t         ufc_status;
        uint16_t         ufc_tag;
        uint16_t         ufc_opcode;
        uint8_t         *ufc_inst_off;
        uint32_t         ufc_inst_sel;
        uint8_t         *ufc_data_off;
        uint32_t         ufc_data_sel;
        uint32_t         usse_mxcsr;
        uint32_t         usse_mxcsr_mask;
        struct ufp387_real {
                uint16_t umant4;
                uint16_t umant3;
                uint16_t umant2;
                uint16_t umant1;
                uint16_t us_and_e;
                uint16_t ureserved_1;
                uint16_t ureserved_2;
                uint16_t ureserved_3;
        } ufc_reg[8];
        struct uxmm_register {
                uint16_t uchunk_1;
                uint16_t uchunk_2;
                uint16_t uchunk_3;
                uint16_t uchunk_4;
                uint16_t uchunk_5;
                uint16_t uchunk_6;
                uint16_t uchunk_7;
                uint16_t uchunk_8;
        } uxmm_reg[8];
        char ureserved[16][14];
} usr_fcontext_t;

/* The index of various registers inside the regcache.  */

enum lynx_i386_gdb_regnum
{
  I386_EAX_REGNUM,
  I386_ECX_REGNUM,
  I386_EDX_REGNUM,
  I386_EBX_REGNUM,
  I386_ESP_REGNUM,
  I386_EBP_REGNUM,
  I386_ESI_REGNUM,
  I386_EDI_REGNUM,
  I386_EIP_REGNUM,
  I386_EFLAGS_REGNUM,
  I386_CS_REGNUM,
  I386_SS_REGNUM,
  I386_DS_REGNUM,
  I386_ES_REGNUM,
  I386_FS_REGNUM,
  I386_GS_REGNUM,
  I386_ST0_REGNUM,
  I386_FCTRL_REGNUM = I386_ST0_REGNUM + 8,
  I386_FSTAT_REGNUM,
  I386_FTAG_REGNUM,
  I386_FISEG_REGNUM,
  I386_FIOFF_REGNUM,
  I386_FOSEG_REGNUM,
  I386_FOOFF_REGNUM,
  I386_FOP_REGNUM,
  I386_XMM0_REGNUM = 32,
  I386_MXCSR_REGNUM = I386_XMM0_REGNUM + 8,
  I386_SENTINEL_REGUM
};

/* Defined in auto-generated file i386.c.  */
extern void init_registers_i386 (void);
extern const struct target_desc *tdesc_i386;

/* The fill_function for the general-purpose register set.  */

static void
lynx_i386_fill_gregset (struct regcache *regcache, char *buf)
{
#define lynx_i386_collect_gp(regnum, fld) \
  collect_register (regcache, regnum, \
                    buf + offsetof (usr_econtext_t, uec_##fld))

  lynx_i386_collect_gp (I386_EAX_REGNUM, eax);
  lynx_i386_collect_gp (I386_ECX_REGNUM, ecx);
  lynx_i386_collect_gp (I386_EDX_REGNUM, edx);
  lynx_i386_collect_gp (I386_EBX_REGNUM, ebx);
  lynx_i386_collect_gp (I386_ESP_REGNUM, esp);
  lynx_i386_collect_gp (I386_EBP_REGNUM, ebp);
  lynx_i386_collect_gp (I386_ESI_REGNUM, esi);
  lynx_i386_collect_gp (I386_EDI_REGNUM, edi);
  lynx_i386_collect_gp (I386_EIP_REGNUM, eip);
  lynx_i386_collect_gp (I386_EFLAGS_REGNUM, eflags);
  lynx_i386_collect_gp (I386_CS_REGNUM, cs);
  lynx_i386_collect_gp (I386_SS_REGNUM, ss);
  lynx_i386_collect_gp (I386_DS_REGNUM, ds);
  lynx_i386_collect_gp (I386_ES_REGNUM, es);
  lynx_i386_collect_gp (I386_FS_REGNUM, fs);
  lynx_i386_collect_gp (I386_GS_REGNUM, gs);
}

/* The store_function for the general-purpose register set.  */

static void
lynx_i386_store_gregset (struct regcache *regcache, const char *buf)
{
#define lynx_i386_supply_gp(regnum, fld) \
  supply_register (regcache, regnum, \
                   buf + offsetof (usr_econtext_t, uec_##fld))

  lynx_i386_supply_gp (I386_EAX_REGNUM, eax);
  lynx_i386_supply_gp (I386_ECX_REGNUM, ecx);
  lynx_i386_supply_gp (I386_EDX_REGNUM, edx);
  lynx_i386_supply_gp (I386_EBX_REGNUM, ebx);
  lynx_i386_supply_gp (I386_ESP_REGNUM, esp);
  lynx_i386_supply_gp (I386_EBP_REGNUM, ebp);
  lynx_i386_supply_gp (I386_ESI_REGNUM, esi);
  lynx_i386_supply_gp (I386_EDI_REGNUM, edi);
  lynx_i386_supply_gp (I386_EIP_REGNUM, eip);
  lynx_i386_supply_gp (I386_EFLAGS_REGNUM, eflags);
  lynx_i386_supply_gp (I386_CS_REGNUM, cs);
  lynx_i386_supply_gp (I386_SS_REGNUM, ss);
  lynx_i386_supply_gp (I386_DS_REGNUM, ds);
  lynx_i386_supply_gp (I386_ES_REGNUM, es);
  lynx_i386_supply_gp (I386_FS_REGNUM, fs);
  lynx_i386_supply_gp (I386_GS_REGNUM, gs);
}

/* Extract the first 16 bits of register REGNUM in the REGCACHE,
   and store these 2 bytes at DEST.

   This is useful to collect certain 16bit registers which are known
   by GDBserver as 32bit registers (such as the Control Register
   for instance).  */

static void
collect_16bit_register (struct regcache *regcache, int regnum, char *dest)
{
  gdb_byte word[4];

  collect_register (regcache, regnum, word);
  memcpy (dest, word, 2);
}

/* The fill_function for the floating-point register set.  */

static void
lynx_i386_fill_fpregset (struct regcache *regcache, char *buf)
{
  int i;

  /* Collect %st0 .. %st7.  */
  for (i = 0; i < 8; i++)
    collect_register (regcache, I386_ST0_REGNUM + i,
                      buf + offsetof (usr_fcontext_t, ufc_reg)
		      + i * sizeof (struct ufp387_real));

  /* Collect the other FPU registers.  */
  collect_16bit_register (regcache, I386_FCTRL_REGNUM,
                          buf + offsetof (usr_fcontext_t, ufc_control));
  collect_16bit_register (regcache, I386_FSTAT_REGNUM,
                          buf + offsetof (usr_fcontext_t, ufc_status));
  collect_16bit_register (regcache, I386_FTAG_REGNUM,
                          buf + offsetof (usr_fcontext_t, ufc_tag));
  collect_register (regcache, I386_FISEG_REGNUM,
                    buf + offsetof (usr_fcontext_t, ufc_inst_sel));
  collect_register (regcache, I386_FIOFF_REGNUM,
                    buf + offsetof (usr_fcontext_t, ufc_inst_off));
  collect_register (regcache, I386_FOSEG_REGNUM,
                    buf + offsetof (usr_fcontext_t, ufc_data_sel));
  collect_register (regcache, I386_FOOFF_REGNUM,
                    buf + offsetof (usr_fcontext_t, ufc_data_off));
  collect_16bit_register (regcache, I386_FOP_REGNUM,
                          buf + offsetof (usr_fcontext_t, ufc_opcode));

  /* Collect the XMM registers.  */
  for (i = 0; i < 8; i++)
    collect_register (regcache, I386_XMM0_REGNUM + i,
                      buf + offsetof (usr_fcontext_t, uxmm_reg)
		      + i * sizeof (struct uxmm_register));
  collect_register (regcache, I386_MXCSR_REGNUM,
                    buf + offsetof (usr_fcontext_t, usse_mxcsr));
}

/* This is the supply counterpart for collect_16bit_register:
   It extracts a 2byte value from BUF, and uses that value to
   set REGNUM's value in the regcache.

   This is useful to supply the value of certain 16bit registers
   which are known by GDBserver as 32bit registers (such as the Control
   Register for instance).  */

static void
supply_16bit_register (struct regcache *regcache, int regnum, const char *buf)
{
  gdb_byte word[4];

  memcpy (word, buf, 2);
  memset (word + 2, 0, 2);
  supply_register (regcache, regnum, word);
}

/* The store_function for the floating-point register set.  */

static void
lynx_i386_store_fpregset (struct regcache *regcache, const char *buf)
{
  int i;

  /* Store the %st0 .. %st7 registers.  */
  for (i = 0; i < 8; i++)
    supply_register (regcache, I386_ST0_REGNUM + i,
                     buf + offsetof (usr_fcontext_t, ufc_reg)
		     + i * sizeof (struct ufp387_real));

  /* Store the other FPU registers.  */
  supply_16bit_register (regcache, I386_FCTRL_REGNUM,
                         buf + offsetof (usr_fcontext_t, ufc_control));
  supply_16bit_register (regcache, I386_FSTAT_REGNUM,
                         buf + offsetof (usr_fcontext_t, ufc_status));
  supply_16bit_register (regcache, I386_FTAG_REGNUM,
                         buf + offsetof (usr_fcontext_t, ufc_tag));
  supply_register (regcache, I386_FISEG_REGNUM,
                   buf + offsetof (usr_fcontext_t, ufc_inst_sel));
  supply_register (regcache, I386_FIOFF_REGNUM,
                   buf + offsetof (usr_fcontext_t, ufc_inst_off));
  supply_register (regcache, I386_FOSEG_REGNUM,
                   buf + offsetof (usr_fcontext_t, ufc_data_sel));
  supply_register (regcache, I386_FOOFF_REGNUM,
                   buf + offsetof (usr_fcontext_t, ufc_data_off));
  supply_16bit_register (regcache, I386_FOP_REGNUM,
                         buf + offsetof (usr_fcontext_t, ufc_opcode));

  /* Store the XMM registers.  */
  for (i = 0; i < 8; i++)
    supply_register (regcache, I386_XMM0_REGNUM + i,
                     buf + offsetof (usr_fcontext_t, uxmm_reg)
		     + i * sizeof (struct uxmm_register));
  supply_register (regcache, I386_MXCSR_REGNUM,
                   buf + offsetof (usr_fcontext_t, usse_mxcsr));
}

/* Implements the lynx_target_ops.arch_setup routine.  */

static void
lynx_i386_arch_setup (void)
{
  init_registers_i386 ();
  lynx_tdesc = tdesc_i386;
}

/* Description of all the x86-lynx register sets.  */

struct lynx_regset_info lynx_target_regsets[] = {
  /* General Purpose Registers.  */
  {PTRACE_GETREGS, PTRACE_SETREGS, sizeof(usr_econtext_t),
   lynx_i386_fill_gregset, lynx_i386_store_gregset},
  /* Floating Point Registers.  */
  { PTRACE_GETFPREGS, PTRACE_SETFPREGS, sizeof(usr_fcontext_t),
    lynx_i386_fill_fpregset, lynx_i386_store_fpregset },
  /* End of list marker.  */
  {0, 0, -1, NULL, NULL }
};

/* The lynx_target_ops vector for x86-lynx.  */

struct lynx_target_ops the_low_target = {
  lynx_i386_arch_setup,
};
Commit	Line	Data
28e7fd62	1	/* Copyright (C) 2010-2013 Free Software Foundation, Inc.
fa1bd1e4 JB	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 "server.h"
	19	#include "lynx-low.h"
	20
	21	#include <stdint.h>
	22	#include <limits.h>
	23	#include <sys/ptrace.h>
	24
	25	/* The following two typedefs are defined in a .h file which is not
	26	in the standard include path (/sys/include/family/x86/ucontext.h),
	27	so we just duplicate them here. */
	28
	29	/* General register context */
	30	typedef struct usr_econtext {
	31
	32	uint32_t uec_fault;
	33	uint32_t uec_es;
	34	uint32_t uec_ds;
	35	uint32_t uec_edi;
	36	uint32_t uec_esi;
	37	uint32_t uec_ebp;
	38	uint32_t uec_temp;
	39	uint32_t uec_ebx;
	40	uint32_t uec_edx;
	41	uint32_t uec_ecx;
	42	uint32_t uec_eax;
	43	uint32_t uec_inum;
	44	uint32_t uec_ecode;
	45	uint32_t uec_eip;
	46	uint32_t uec_cs;
	47	uint32_t uec_eflags;
	48	uint32_t uec_esp;
	49	uint32_t uec_ss;
	50	uint32_t uec_fs;
	51	uint32_t uec_gs;
	52	} usr_econtext_t;
	53
	54	/* Floating point and SIMD register context */
	55	typedef struct usr_fcontext {
	56	uint16_t ufc_control;
	57	uint16_t ufc_status;
	58	uint16_t ufc_tag;
	59	uint16_t ufc_opcode;
	60	uint8_t *ufc_inst_off;
	61	uint32_t ufc_inst_sel;
	62	uint8_t *ufc_data_off;
	63	uint32_t ufc_data_sel;
	64	uint32_t usse_mxcsr;
	65	uint32_t usse_mxcsr_mask;
66	struct ufp387_real {
67	uint16_t umant4;
68	uint16_t umant3;
69	uint16_t umant2;
70	uint16_t umant1;
71	uint16_t us_and_e;
72	uint16_t ureserved_1;
73	uint16_t ureserved_2;
74	uint16_t ureserved_3;
75	} ufc_reg[8];
76	struct uxmm_register {
77	uint16_t uchunk_1;
78	uint16_t uchunk_2;
79	uint16_t uchunk_3;
80	uint16_t uchunk_4;
81	uint16_t uchunk_5;
82	uint16_t uchunk_6;
83	uint16_t uchunk_7;
84	uint16_t uchunk_8;
85	} uxmm_reg[8];
86	char ureserved[16][14];
87	} usr_fcontext_t;
88
89	/* The index of various registers inside the regcache. */
90
91	enum lynx_i386_gdb_regnum
92	{
93	I386_EAX_REGNUM,
94	I386_ECX_REGNUM,
95	I386_EDX_REGNUM,
96	I386_EBX_REGNUM,
97	I386_ESP_REGNUM,
98	I386_EBP_REGNUM,
99	I386_ESI_REGNUM,
100	I386_EDI_REGNUM,
101	I386_EIP_REGNUM,
102	I386_EFLAGS_REGNUM,
103	I386_CS_REGNUM,
104	I386_SS_REGNUM,
105	I386_DS_REGNUM,
106	I386_ES_REGNUM,
107	I386_FS_REGNUM,
108	I386_GS_REGNUM,
109	I386_ST0_REGNUM,
110	I386_FCTRL_REGNUM = I386_ST0_REGNUM + 8,
111	I386_FSTAT_REGNUM,
112	I386_FTAG_REGNUM,
113	I386_FISEG_REGNUM,
114	I386_FIOFF_REGNUM,
115	I386_FOSEG_REGNUM,
116	I386_FOOFF_REGNUM,
117	I386_FOP_REGNUM,
118	I386_XMM0_REGNUM = 32,
119	I386_MXCSR_REGNUM = I386_XMM0_REGNUM + 8,
120	I386_SENTINEL_REGUM
121	};
122
123	/* Defined in auto-generated file i386.c. */
124	extern void init_registers_i386 (void);
3aee8918	125	extern const struct target_desc *tdesc_i386;
fa1bd1e4 JB	126
	127	/* The fill_function for the general-purpose register set. */
	128
	129	static void
	130	lynx_i386_fill_gregset (struct regcache regcache, char buf)
	131	{
	132	#define lynx_i386_collect_gp(regnum, fld) \
	133	collect_register (regcache, regnum, \
	134	buf + offsetof (usr_econtext_t, uec_##fld))
	135
	136	lynx_i386_collect_gp (I386_EAX_REGNUM, eax);
	137	lynx_i386_collect_gp (I386_ECX_REGNUM, ecx);
	138	lynx_i386_collect_gp (I386_EDX_REGNUM, edx);
	139	lynx_i386_collect_gp (I386_EBX_REGNUM, ebx);
	140	lynx_i386_collect_gp (I386_ESP_REGNUM, esp);
	141	lynx_i386_collect_gp (I386_EBP_REGNUM, ebp);
	142	lynx_i386_collect_gp (I386_ESI_REGNUM, esi);
	143	lynx_i386_collect_gp (I386_EDI_REGNUM, edi);
	144	lynx_i386_collect_gp (I386_EIP_REGNUM, eip);
	145	lynx_i386_collect_gp (I386_EFLAGS_REGNUM, eflags);
	146	lynx_i386_collect_gp (I386_CS_REGNUM, cs);
	147	lynx_i386_collect_gp (I386_SS_REGNUM, ss);
	148	lynx_i386_collect_gp (I386_DS_REGNUM, ds);
	149	lynx_i386_collect_gp (I386_ES_REGNUM, es);
	150	lynx_i386_collect_gp (I386_FS_REGNUM, fs);
	151	lynx_i386_collect_gp (I386_GS_REGNUM, gs);
	152	}
	153
	154	/* The store_function for the general-purpose register set. */
	155
	156	static void
	157	lynx_i386_store_gregset (struct regcache regcache, const char buf)
	158	{
	159	#define lynx_i386_supply_gp(regnum, fld) \
	160	supply_register (regcache, regnum, \
	161	buf + offsetof (usr_econtext_t, uec_##fld))
	162
	163	lynx_i386_supply_gp (I386_EAX_REGNUM, eax);
	164	lynx_i386_supply_gp (I386_ECX_REGNUM, ecx);
	165	lynx_i386_supply_gp (I386_EDX_REGNUM, edx);
	166	lynx_i386_supply_gp (I386_EBX_REGNUM, ebx);
	167	lynx_i386_supply_gp (I386_ESP_REGNUM, esp);
	168	lynx_i386_supply_gp (I386_EBP_REGNUM, ebp);
	169	lynx_i386_supply_gp (I386_ESI_REGNUM, esi);
	170	lynx_i386_supply_gp (I386_EDI_REGNUM, edi);
	171	lynx_i386_supply_gp (I386_EIP_REGNUM, eip);
	172	lynx_i386_supply_gp (I386_EFLAGS_REGNUM, eflags);
	173	lynx_i386_supply_gp (I386_CS_REGNUM, cs);
	174	lynx_i386_supply_gp (I386_SS_REGNUM, ss);
	175	lynx_i386_supply_gp (I386_DS_REGNUM, ds);
	176	lynx_i386_supply_gp (I386_ES_REGNUM, es);
	177	lynx_i386_supply_gp (I386_FS_REGNUM, fs);
	178	lynx_i386_supply_gp (I386_GS_REGNUM, gs);
	179	}
	180
	181	/* Extract the first 16 bits of register REGNUM in the REGCACHE,
	182	and store these 2 bytes at DEST.
	183
	184	This is useful to collect certain 16bit registers which are known
	185	by GDBserver as 32bit registers (such as the Control Register
	186	for instance). */
	187
	188	static void
	189	collect_16bit_register (struct regcache regcache, int regnum, char dest)
190	{
191	gdb_byte word[4];
192
193	collect_register (regcache, regnum, word);
194	memcpy (dest, word, 2);
195	}
196
197	/* The fill_function for the floating-point register set. */
198
199	static void
200	lynx_i386_fill_fpregset (struct regcache regcache, char buf)
201	{
202	int i;
203
204	/* Collect %st0 .. %st7. */
205	for (i = 0; i < 8; i++)
206	collect_register (regcache, I386_ST0_REGNUM + i,
207	buf + offsetof (usr_fcontext_t, ufc_reg)
208	+ i * sizeof (struct ufp387_real));
209
210	/* Collect the other FPU registers. */
211	collect_16bit_register (regcache, I386_FCTRL_REGNUM,
212	buf + offsetof (usr_fcontext_t, ufc_control));
213	collect_16bit_register (regcache, I386_FSTAT_REGNUM,
214	buf + offsetof (usr_fcontext_t, ufc_status));
215	collect_16bit_register (regcache, I386_FTAG_REGNUM,
216	buf + offsetof (usr_fcontext_t, ufc_tag));
217	collect_register (regcache, I386_FISEG_REGNUM,
218	buf + offsetof (usr_fcontext_t, ufc_inst_sel));
219	collect_register (regcache, I386_FIOFF_REGNUM,
220	buf + offsetof (usr_fcontext_t, ufc_inst_off));
221	collect_register (regcache, I386_FOSEG_REGNUM,
222	buf + offsetof (usr_fcontext_t, ufc_data_sel));
223	collect_register (regcache, I386_FOOFF_REGNUM,
224	buf + offsetof (usr_fcontext_t, ufc_data_off));
225	collect_16bit_register (regcache, I386_FOP_REGNUM,
226	buf + offsetof (usr_fcontext_t, ufc_opcode));
227
228	/* Collect the XMM registers. */
229	for (i = 0; i < 8; i++)
230	collect_register (regcache, I386_XMM0_REGNUM + i,
231	buf + offsetof (usr_fcontext_t, uxmm_reg)
232	+ i * sizeof (struct uxmm_register));
233	collect_register (regcache, I386_MXCSR_REGNUM,
234	buf + offsetof (usr_fcontext_t, usse_mxcsr));
235	}
236
237	/* This is the supply counterpart for collect_16bit_register:
238	It extracts a 2byte value from BUF, and uses that value to
239	set REGNUM's value in the regcache.
240
241	This is useful to supply the value of certain 16bit registers
242	which are known by GDBserver as 32bit registers (such as the Control
243	Register for instance). */
244
245	static void
246	supply_16bit_register (struct regcache regcache, int regnum, const char buf)
247	{
248	gdb_byte word[4];
249
250	memcpy (word, buf, 2);
251	memset (word + 2, 0, 2);
252	supply_register (regcache, regnum, word);
253	}
254
255	/* The store_function for the floating-point register set. */
256
257	static void
258	lynx_i386_store_fpregset (struct regcache regcache, const char buf)
259	{
260	int i;
261
262	/* Store the %st0 .. %st7 registers. */
263	for (i = 0; i < 8; i++)
264	supply_register (regcache, I386_ST0_REGNUM + i,
265	buf + offsetof (usr_fcontext_t, ufc_reg)
266	+ i * sizeof (struct ufp387_real));
267
268	/* Store the other FPU registers. */
269	supply_16bit_register (regcache, I386_FCTRL_REGNUM,
270	buf + offsetof (usr_fcontext_t, ufc_control));
271	supply_16bit_register (regcache, I386_FSTAT_REGNUM,
272	buf + offsetof (usr_fcontext_t, ufc_status));
273	supply_16bit_register (regcache, I386_FTAG_REGNUM,
274	buf + offsetof (usr_fcontext_t, ufc_tag));
275	supply_register (regcache, I386_FISEG_REGNUM,
276	buf + offsetof (usr_fcontext_t, ufc_inst_sel));
277	supply_register (regcache, I386_FIOFF_REGNUM,
278	buf + offsetof (usr_fcontext_t, ufc_inst_off));
279	supply_register (regcache, I386_FOSEG_REGNUM,
280	buf + offsetof (usr_fcontext_t, ufc_data_sel));
281	supply_register (regcache, I386_FOOFF_REGNUM,
282	buf + offsetof (usr_fcontext_t, ufc_data_off));
283	supply_16bit_register (regcache, I386_FOP_REGNUM,
284	buf + offsetof (usr_fcontext_t, ufc_opcode));
285
286	/* Store the XMM registers. */
287	for (i = 0; i < 8; i++)
288	supply_register (regcache, I386_XMM0_REGNUM + i,
289	buf + offsetof (usr_fcontext_t, uxmm_reg)
290	+ i * sizeof (struct uxmm_register));
291	supply_register (regcache, I386_MXCSR_REGNUM,
292	buf + offsetof (usr_fcontext_t, usse_mxcsr));
293	}
294
295	/* Implements the lynx_target_ops.arch_setup routine. */
296
297	static void
298	lynx_i386_arch_setup (void)
299	{
300	init_registers_i386 ();
3aee8918	301	lynx_tdesc = tdesc_i386;
fa1bd1e4 JB	302	}
	303
	304	/* Description of all the x86-lynx register sets. */
	305
	306	struct lynx_regset_info lynx_target_regsets[] = {
	307	/* General Purpose Registers. */
	308	{PTRACE_GETREGS, PTRACE_SETREGS, sizeof(usr_econtext_t),
	309	lynx_i386_fill_gregset, lynx_i386_store_gregset},
	310	/* Floating Point Registers. */
	311	{ PTRACE_GETFPREGS, PTRACE_SETFPREGS, sizeof(usr_fcontext_t),
	312	lynx_i386_fill_fpregset, lynx_i386_store_fpregset },
	313	/* End of list marker. */
	314	{0, 0, -1, NULL, NULL }
	315	};
	316
	317	/* The lynx_target_ops vector for x86-lynx. */
	318
	319	struct lynx_target_ops the_low_target = {
	320	lynx_i386_arch_setup,
	321	};