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lynx-i386-low.c
Go to the documentation of this file.
1
/* Copyright (C) 2010-2015 Free Software Foundation, Inc.
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3
This file is part of GDB.
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5
This program is free software; you can redistribute it and/or modify
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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.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "
server.h
"
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#include "
lynx-low.h
"
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#include <limits.h>
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#include <sys/ptrace.h>
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/* The following two typedefs are defined in a .h file which is not
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in the standard include path (/sys/include/family/x86/ucontext.h),
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so we just duplicate them here. */
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/* General register context */
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typedef
struct
usr_econtext
{
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uint32_t
uec_fault
;
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uint32_t
uec_es
;
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uint32_t
uec_ds
;
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uint32_t
uec_edi
;
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uint32_t
uec_esi
;
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uint32_t
uec_ebp
;
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uint32_t
uec_temp
;
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uint32_t
uec_ebx
;
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uint32_t
uec_edx
;
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uint32_t
uec_ecx
;
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uint32_t
uec_eax
;
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uint32_t
uec_inum
;
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uint32_t
uec_ecode
;
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uint32_t
uec_eip
;
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uint32_t
uec_cs
;
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uint32_t
uec_eflags
;
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uint32_t
uec_esp
;
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uint32_t
uec_ss
;
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uint32_t
uec_fs
;
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uint32_t
uec_gs
;
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}
usr_econtext_t
;
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/* Floating point and SIMD register context */
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typedef
struct
usr_fcontext
{
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uint16_t
ufc_control
;
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uint16_t
ufc_status
;
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uint16_t
ufc_tag
;
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uint16_t
ufc_opcode
;
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uint8_t *
ufc_inst_off
;
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uint32_t
ufc_inst_sel
;
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uint8_t *
ufc_data_off
;
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uint32_t
ufc_data_sel
;
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uint32_t
usse_mxcsr
;
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uint32_t
usse_mxcsr_mask
;
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struct
ufp387_real
{
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uint16_t
umant4
;
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uint16_t
umant3
;
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uint16_t
umant2
;
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uint16_t
umant1
;
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uint16_t
us_and_e
;
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uint16_t
ureserved_1
;
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uint16_t
ureserved_2
;
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uint16_t
ureserved_3
;
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}
ufc_reg
[8];
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struct
uxmm_register
{
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uint16_t
uchunk_1
;
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uint16_t
uchunk_2
;
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uint16_t
uchunk_3
;
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uint16_t
uchunk_4
;
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uint16_t
uchunk_5
;
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uint16_t
uchunk_6
;
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uint16_t
uchunk_7
;
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uint16_t
uchunk_8
;
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}
uxmm_reg
[8];
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char
ureserved
[16][14];
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}
usr_fcontext_t
;
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/* The index of various registers inside the regcache. */
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enum
lynx_i386_gdb_regnum
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{
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I386_EAX_REGNUM
,
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I386_ECX_REGNUM
,
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I386_EDX_REGNUM
,
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I386_EBX_REGNUM
,
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I386_ESP_REGNUM
,
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I386_EBP_REGNUM
,
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I386_ESI_REGNUM
,
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I386_EDI_REGNUM
,
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I386_EIP_REGNUM
,
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I386_EFLAGS_REGNUM
,
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I386_CS_REGNUM
,
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I386_SS_REGNUM
,
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I386_DS_REGNUM
,
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I386_ES_REGNUM
,
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I386_FS_REGNUM
,
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I386_GS_REGNUM
,
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I386_ST0_REGNUM
,
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I386_FCTRL_REGNUM
=
I386_ST0_REGNUM
+ 8,
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I386_FSTAT_REGNUM
,
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I386_FTAG_REGNUM
,
111
I386_FISEG_REGNUM
,
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I386_FIOFF_REGNUM
,
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I386_FOSEG_REGNUM
,
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I386_FOOFF_REGNUM
,
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I386_FOP_REGNUM
,
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I386_XMM0_REGNUM
= 32,
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I386_MXCSR_REGNUM
=
I386_XMM0_REGNUM
+ 8,
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I386_SENTINEL_REGUM
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};
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/* Defined in auto-generated file i386.c. */
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extern
void
init_registers_i386
(
void
);
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extern
const
struct
target_desc
*
tdesc_i386
;
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/* The fill_function for the general-purpose register set. */
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static
void
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lynx_i386_fill_gregset
(
struct
regcache
*
regcache
,
char
*buf)
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{
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#define lynx_i386_collect_gp(regnum, fld) \
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collect_register (regcache, regnum, \
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buf + offsetof (usr_econtext_t, uec_##fld))
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lynx_i386_collect_gp
(
I386_EAX_REGNUM
, eax);
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lynx_i386_collect_gp
(
I386_ECX_REGNUM
, ecx);
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lynx_i386_collect_gp
(
I386_EDX_REGNUM
, edx);
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lynx_i386_collect_gp
(
I386_EBX_REGNUM
, ebx);
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lynx_i386_collect_gp
(
I386_ESP_REGNUM
, esp);
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lynx_i386_collect_gp
(
I386_EBP_REGNUM
, ebp);
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lynx_i386_collect_gp
(
I386_ESI_REGNUM
, esi);
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lynx_i386_collect_gp
(
I386_EDI_REGNUM
, edi);
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lynx_i386_collect_gp
(
I386_EIP_REGNUM
, eip);
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lynx_i386_collect_gp
(
I386_EFLAGS_REGNUM
, eflags);
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lynx_i386_collect_gp
(
I386_CS_REGNUM
, cs);
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lynx_i386_collect_gp
(
I386_SS_REGNUM
, ss);
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lynx_i386_collect_gp
(
I386_DS_REGNUM
, ds);
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lynx_i386_collect_gp
(
I386_ES_REGNUM
, es);
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lynx_i386_collect_gp
(
I386_FS_REGNUM
, fs);
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lynx_i386_collect_gp
(
I386_GS_REGNUM
, gs);
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}
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/* The store_function for the general-purpose register set. */
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static
void
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lynx_i386_store_gregset
(
struct
regcache
*
regcache
,
const
char
*buf)
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{
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#define lynx_i386_supply_gp(regnum, fld) \
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supply_register (regcache, regnum, \
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buf + offsetof (usr_econtext_t, uec_##fld))
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lynx_i386_supply_gp
(
I386_EAX_REGNUM
, eax);
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lynx_i386_supply_gp
(
I386_ECX_REGNUM
, ecx);
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lynx_i386_supply_gp
(
I386_EDX_REGNUM
, edx);
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lynx_i386_supply_gp
(
I386_EBX_REGNUM
, ebx);
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lynx_i386_supply_gp
(
I386_ESP_REGNUM
, esp);
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lynx_i386_supply_gp
(
I386_EBP_REGNUM
, ebp);
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lynx_i386_supply_gp
(
I386_ESI_REGNUM
, esi);
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lynx_i386_supply_gp
(
I386_EDI_REGNUM
, edi);
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lynx_i386_supply_gp
(
I386_EIP_REGNUM
, eip);
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lynx_i386_supply_gp
(
I386_EFLAGS_REGNUM
, eflags);
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lynx_i386_supply_gp
(
I386_CS_REGNUM
, cs);
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lynx_i386_supply_gp
(
I386_SS_REGNUM
, ss);
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lynx_i386_supply_gp
(
I386_DS_REGNUM
, ds);
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lynx_i386_supply_gp
(
I386_ES_REGNUM
, es);
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lynx_i386_supply_gp
(
I386_FS_REGNUM
, fs);
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lynx_i386_supply_gp
(
I386_GS_REGNUM
, gs);
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}
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/* Extract the first 16 bits of register REGNUM in the REGCACHE,
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and store these 2 bytes at DEST.
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This is useful to collect certain 16bit registers which are known
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by GDBserver as 32bit registers (such as the Control Register
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for instance). */
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static
void
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collect_16bit_register
(
struct
regcache
*
regcache
,
int
regnum
,
char
*dest)
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{
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gdb_byte
word[4];
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collect_register
(regcache, regnum, word);
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memcpy (dest, word, 2);
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}
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/* The fill_function for the floating-point register set. */
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static
void
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lynx_i386_fill_fpregset
(
struct
regcache
*
regcache
,
char
*buf)
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{
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int
i;
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/* Collect %st0 .. %st7. */
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for
(i = 0; i < 8; i++)
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collect_register
(regcache,
I386_ST0_REGNUM
+ i,
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buf + offsetof (
usr_fcontext_t
, ufc_reg)
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+ i *
sizeof
(
struct
ufp387_real));
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/* Collect the other FPU registers. */
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collect_16bit_register
(regcache,
I386_FCTRL_REGNUM
,
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buf + offsetof (
usr_fcontext_t
, ufc_control));
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collect_16bit_register
(regcache,
I386_FSTAT_REGNUM
,
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buf + offsetof (
usr_fcontext_t
, ufc_status));
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collect_16bit_register
(regcache,
I386_FTAG_REGNUM
,
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buf + offsetof (
usr_fcontext_t
, ufc_tag));
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collect_register
(regcache,
I386_FISEG_REGNUM
,
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buf + offsetof (
usr_fcontext_t
, ufc_inst_sel));
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collect_register
(regcache,
I386_FIOFF_REGNUM
,
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buf + offsetof (
usr_fcontext_t
, ufc_inst_off));
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collect_register
(regcache,
I386_FOSEG_REGNUM
,
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buf + offsetof (
usr_fcontext_t
, ufc_data_sel));
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collect_register
(regcache,
I386_FOOFF_REGNUM
,
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buf + offsetof (
usr_fcontext_t
, ufc_data_off));
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collect_16bit_register
(regcache,
I386_FOP_REGNUM
,
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buf + offsetof (
usr_fcontext_t
, ufc_opcode));
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/* Collect the XMM registers. */
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for
(i = 0; i < 8; i++)
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collect_register
(regcache,
I386_XMM0_REGNUM
+ i,
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buf + offsetof (
usr_fcontext_t
, uxmm_reg)
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+ i *
sizeof
(
struct
uxmm_register));
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collect_register
(regcache,
I386_MXCSR_REGNUM
,
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buf + offsetof (
usr_fcontext_t
, usse_mxcsr));
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}
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/* This is the supply counterpart for collect_16bit_register:
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It extracts a 2byte value from BUF, and uses that value to
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set REGNUM's value in the regcache.
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This is useful to supply the value of certain 16bit registers
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which are known by GDBserver as 32bit registers (such as the Control
241
Register for instance). */
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static
void
244
supply_16bit_register
(
struct
regcache
*
regcache
,
int
regnum
,
const
char
*buf)
245
{
246
gdb_byte
word[4];
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memcpy (word, buf, 2);
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memset (word + 2, 0, 2);
250
supply_register
(regcache, regnum, word);
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}
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/* The store_function for the floating-point register set. */
254
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static
void
256
lynx_i386_store_fpregset
(
struct
regcache
*
regcache
,
const
char
*buf)
257
{
258
int
i;
259
260
/* Store the %st0 .. %st7 registers. */
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for
(i = 0; i < 8; i++)
262
supply_register
(regcache,
I386_ST0_REGNUM
+ i,
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buf + offsetof (
usr_fcontext_t
, ufc_reg)
264
+ i *
sizeof
(
struct
ufp387_real));
265
266
/* Store the other FPU registers. */
267
supply_16bit_register
(regcache,
I386_FCTRL_REGNUM
,
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buf + offsetof (
usr_fcontext_t
, ufc_control));
269
supply_16bit_register
(regcache,
I386_FSTAT_REGNUM
,
270
buf + offsetof (
usr_fcontext_t
, ufc_status));
271
supply_16bit_register
(regcache,
I386_FTAG_REGNUM
,
272
buf + offsetof (
usr_fcontext_t
, ufc_tag));
273
supply_register
(regcache,
I386_FISEG_REGNUM
,
274
buf + offsetof (
usr_fcontext_t
, ufc_inst_sel));
275
supply_register
(regcache,
I386_FIOFF_REGNUM
,
276
buf + offsetof (
usr_fcontext_t
, ufc_inst_off));
277
supply_register
(regcache,
I386_FOSEG_REGNUM
,
278
buf + offsetof (
usr_fcontext_t
, ufc_data_sel));
279
supply_register
(regcache,
I386_FOOFF_REGNUM
,
280
buf + offsetof (
usr_fcontext_t
, ufc_data_off));
281
supply_16bit_register
(regcache,
I386_FOP_REGNUM
,
282
buf + offsetof (
usr_fcontext_t
, ufc_opcode));
283
284
/* Store the XMM registers. */
285
for
(i = 0; i < 8; i++)
286
supply_register
(regcache,
I386_XMM0_REGNUM
+ i,
287
buf + offsetof (
usr_fcontext_t
, uxmm_reg)
288
+ i *
sizeof
(
struct
uxmm_register));
289
supply_register
(regcache,
I386_MXCSR_REGNUM
,
290
buf + offsetof (
usr_fcontext_t
, usse_mxcsr));
291
}
292
293
/* Implements the lynx_target_ops.arch_setup routine. */
294
295
static
void
296
lynx_i386_arch_setup
(
void
)
297
{
298
init_registers_i386
();
299
lynx_tdesc
=
tdesc_i386
;
300
}
301
302
/* Description of all the x86-lynx register sets. */
303
304
struct
lynx_regset_info
lynx_target_regsets[] = {
305
/* General Purpose Registers. */
306
{PTRACE_GETREGS, PTRACE_SETREGS,
sizeof
(
usr_econtext_t
),
307
lynx_i386_fill_gregset
,
lynx_i386_store_gregset
},
308
/* Floating Point Registers. */
309
{ PTRACE_GETFPREGS, PTRACE_SETFPREGS,
sizeof
(
usr_fcontext_t
),
310
lynx_i386_fill_fpregset
,
lynx_i386_store_fpregset
},
311
/* End of list marker. */
312
{0, 0, -1, NULL, NULL }
313
};
314
315
/* The lynx_target_ops vector for x86-lynx. */
316
317
struct
lynx_target_ops
the_low_target = {
318
lynx_i386_arch_setup
,
319
};
usr_econtext::uec_edi
uint32_t uec_edi
Definition:
lynx-i386-low.c:33
usr_fcontext::uxmm_register::uchunk_8
uint16_t uchunk_8
Definition:
lynx-i386-low.c:82
collect_register
void collect_register(struct regcache *regcache, int n, void *buf)
Definition:
regcache.c:414
usr_fcontext::ufc_opcode
uint16_t ufc_opcode
Definition:
lynx-i386-low.c:57
tdesc_i386
const struct target_desc * tdesc_i386
usr_fcontext::usse_mxcsr_mask
uint32_t usse_mxcsr_mask
Definition:
lynx-i386-low.c:63
usr_fcontext::uxmm_register::uchunk_5
uint16_t uchunk_5
Definition:
lynx-i386-low.c:79
usr_fcontext::uxmm_register::uchunk_6
uint16_t uchunk_6
Definition:
lynx-i386-low.c:80
usr_fcontext::ufc_tag
uint16_t ufc_tag
Definition:
lynx-i386-low.c:56
usr_econtext::uec_cs
uint32_t uec_cs
Definition:
lynx-i386-low.c:44
I386_SENTINEL_REGUM
Definition:
lynx-i386-low.c:118
I386_FS_REGNUM
Definition:
lynx-i386-low.c:105
usr_fcontext::ufp387_real::umant4
uint16_t umant4
Definition:
lynx-i386-low.c:65
usr_econtext::uec_esi
uint32_t uec_esi
Definition:
lynx-i386-low.c:34
usr_econtext::uec_eflags
uint32_t uec_eflags
Definition:
lynx-i386-low.c:45
usr_fcontext::ufp387_real::us_and_e
uint16_t us_and_e
Definition:
lynx-i386-low.c:69
usr_fcontext::usse_mxcsr
uint32_t usse_mxcsr
Definition:
lynx-i386-low.c:62
lynx_i386_supply_gp
#define lynx_i386_supply_gp(regnum, fld)
I386_FCTRL_REGNUM
Definition:
lynx-i386-low.c:108
usr_fcontext::ufp387_real::umant2
uint16_t umant2
Definition:
lynx-i386-low.c:67
I386_EIP_REGNUM
Definition:
lynx-i386-low.c:99
usr_fcontext::ufc_data_sel
uint32_t ufc_data_sel
Definition:
lynx-i386-low.c:61
I386_DS_REGNUM
Definition:
lynx-i386-low.c:103
usr_econtext::uec_ebx
uint32_t uec_ebx
Definition:
lynx-i386-low.c:37
usr_fcontext::ufc_data_off
uint8_t * ufc_data_off
Definition:
lynx-i386-low.c:60
usr_fcontext::ufp387_real::ureserved_2
uint16_t ureserved_2
Definition:
lynx-i386-low.c:71
I386_GS_REGNUM
Definition:
lynx-i386-low.c:106
usr_econtext::uec_fs
uint32_t uec_fs
Definition:
lynx-i386-low.c:48
I386_ESP_REGNUM
Definition:
lynx-i386-low.c:95
usr_econtext::uec_fault
uint32_t uec_fault
Definition:
lynx-i386-low.c:30
I386_ES_REGNUM
Definition:
lynx-i386-low.c:104
usr_fcontext::ufc_inst_sel
uint32_t ufc_inst_sel
Definition:
lynx-i386-low.c:59
I386_CS_REGNUM
Definition:
lynx-i386-low.c:101
usr_econtext::uec_edx
uint32_t uec_edx
Definition:
lynx-i386-low.c:38
lynx_i386_collect_gp
#define lynx_i386_collect_gp(regnum, fld)
I386_ECX_REGNUM
Definition:
lynx-i386-low.c:92
regnum
regnum
Definition:
linux-xtensa-low.c:32
usr_fcontext::ufc_inst_off
uint8_t * ufc_inst_off
Definition:
lynx-i386-low.c:58
usr_fcontext::ufp387_real::ureserved_1
uint16_t ureserved_1
Definition:
lynx-i386-low.c:70
lynx_i386_gdb_regnum
lynx_i386_gdb_regnum
Definition:
lynx-i386-low.c:89
lynx_i386_store_fpregset
static void lynx_i386_store_fpregset(struct regcache *regcache, const char *buf)
Definition:
lynx-i386-low.c:256
regcache
Definition:
regcache.h:38
usr_econtext::uec_gs
uint32_t uec_gs
Definition:
lynx-i386-low.c:49
I386_FOP_REGNUM
Definition:
lynx-i386-low.c:115
I386_EDI_REGNUM
Definition:
lynx-i386-low.c:98
I386_ST0_REGNUM
Definition:
lynx-i386-low.c:107
usr_econtext::uec_ebp
uint32_t uec_ebp
Definition:
lynx-i386-low.c:35
lynx_i386_arch_setup
static void lynx_i386_arch_setup(void)
Definition:
lynx-i386-low.c:296
init_registers_i386
void init_registers_i386(void)
I386_FIOFF_REGNUM
Definition:
lynx-i386-low.c:112
I386_SS_REGNUM
Definition:
lynx-i386-low.c:102
lynx_target_ops
Definition:
lynx-low.h:44
lynx_i386_fill_gregset
static void lynx_i386_fill_gregset(struct regcache *regcache, char *buf)
Definition:
lynx-i386-low.c:128
I386_FOSEG_REGNUM
Definition:
lynx-i386-low.c:113
usr_fcontext::ureserved
char ureserved[16][14]
Definition:
lynx-i386-low.c:84
lynx_tdesc
const struct target_desc * lynx_tdesc
Definition:
lynx-low.c:34
usr_econtext::uec_ds
uint32_t uec_ds
Definition:
lynx-i386-low.c:32
usr_econtext::uec_ecode
uint32_t uec_ecode
Definition:
lynx-i386-low.c:42
usr_econtext::uec_temp
uint32_t uec_temp
Definition:
lynx-i386-low.c:36
usr_econtext::uec_es
uint32_t uec_es
Definition:
lynx-i386-low.c:31
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Definition:
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Definition:
lynx-i386-low.c:93
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Definition:
lynx-i386-low.c:64
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uint32_t uec_ss
Definition:
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Definition:
lynx-i386-low.c:100
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uint32_t uec_inum
Definition:
lynx-i386-low.c:41
I386_EBP_REGNUM
Definition:
lynx-i386-low.c:96
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uint16_t umant3
Definition:
lynx-i386-low.c:66
I386_EBX_REGNUM
Definition:
lynx-i386-low.c:94
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struct usr_fcontext::ufp387_real ufc_reg[8]
I386_FISEG_REGNUM
Definition:
lynx-i386-low.c:111
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struct usr_fcontext usr_fcontext_t
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uint16_t uchunk_4
Definition:
lynx-i386-low.c:78
I386_XMM0_REGNUM
Definition:
lynx-i386-low.c:116
I386_FSTAT_REGNUM
Definition:
lynx-i386-low.c:109
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uint32_t uec_esp
Definition:
lynx-i386-low.c:46
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bfd_byte gdb_byte
Definition:
common-types.h:38
usr_econtext::uec_ecx
uint32_t uec_ecx
Definition:
lynx-i386-low.c:39
usr_fcontext::uxmm_reg
struct usr_fcontext::uxmm_register uxmm_reg[8]
supply_16bit_register
static void supply_16bit_register(struct regcache *regcache, int regnum, const char *buf)
Definition:
lynx-i386-low.c:244
usr_fcontext::ufc_status
uint16_t ufc_status
Definition:
lynx-i386-low.c:55
I386_FTAG_REGNUM
Definition:
lynx-i386-low.c:110
usr_econtext::uec_eip
uint32_t uec_eip
Definition:
lynx-i386-low.c:43
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Definition:
tdesc.h:26
lynx-low.h
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Definition:
lynx-i386-low.c:53
usr_fcontext::ufp387_real::umant1
uint16_t umant1
Definition:
lynx-i386-low.c:68
lynx_i386_store_gregset
static void lynx_i386_store_gregset(struct regcache *regcache, const char *buf)
Definition:
lynx-i386-low.c:155
I386_FOOFF_REGNUM
Definition:
lynx-i386-low.c:114
usr_fcontext::uxmm_register::uchunk_7
uint16_t uchunk_7
Definition:
lynx-i386-low.c:81
I386_MXCSR_REGNUM
Definition:
lynx-i386-low.c:117
usr_econtext::uec_eax
uint32_t uec_eax
Definition:
lynx-i386-low.c:40
usr_fcontext::uxmm_register::uchunk_1
uint16_t uchunk_1
Definition:
lynx-i386-low.c:75
I386_EAX_REGNUM
Definition:
lynx-i386-low.c:91
collect_16bit_register
static void collect_16bit_register(struct regcache *regcache, int regnum, char *dest)
Definition:
lynx-i386-low.c:187
usr_fcontext::uxmm_register
Definition:
lynx-i386-low.c:74
usr_fcontext::uxmm_register::uchunk_2
uint16_t uchunk_2
Definition:
lynx-i386-low.c:76
usr_econtext_t
struct usr_econtext usr_econtext_t
lynx_regset_info
Definition:
lynx-low.h:23
supply_register
void supply_register(struct regcache *regcache, int n, const void *buf)
Definition:
regcache.c:330
usr_econtext
Definition:
lynx-i386-low.c:28
I386_ESI_REGNUM
Definition:
lynx-i386-low.c:97
usr_fcontext::ufp387_real::ureserved_3
uint16_t ureserved_3
Definition:
lynx-i386-low.c:72
usr_fcontext::uxmm_register::uchunk_3
uint16_t uchunk_3
Definition:
lynx-i386-low.c:77
lynx_i386_fill_fpregset
static void lynx_i386_fill_fpregset(struct regcache *regcache, char *buf)
Definition:
lynx-i386-low.c:198
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