1 /* GNU/Linux/x86 specific low level interface, for the in-process
4 Copyright (C) 2010, 2011 Free Software Foundation, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
23 /* GDB register numbers. */
27 I386_EAX_REGNUM
, /* %eax */
28 I386_ECX_REGNUM
, /* %ecx */
29 I386_EDX_REGNUM
, /* %edx */
30 I386_EBX_REGNUM
, /* %ebx */
31 I386_ESP_REGNUM
, /* %esp */
32 I386_EBP_REGNUM
, /* %ebp */
33 I386_ESI_REGNUM
, /* %esi */
34 I386_EDI_REGNUM
, /* %edi */
35 I386_EIP_REGNUM
, /* %eip */
36 I386_EFLAGS_REGNUM
, /* %eflags */
37 I386_CS_REGNUM
, /* %cs */
38 I386_SS_REGNUM
, /* %ss */
39 I386_DS_REGNUM
, /* %ds */
40 I386_ES_REGNUM
, /* %es */
41 I386_FS_REGNUM
, /* %fs */
42 I386_GS_REGNUM
, /* %gs */
43 I386_ST0_REGNUM
/* %st(0) */
46 #define i386_num_regs 16
48 /* Defined in auto-generated file i386-linux.c. */
49 void init_registers_i386_linux (void);
68 /* Mapping between the general-purpose registers in jump tracepoint
69 format and GDB's register array layout. */
71 static const int i386_ft_collect_regmap
[] =
73 FT_CR_EAX
* 4, FT_CR_ECX
* 4, FT_CR_EDX
* 4, FT_CR_EBX
* 4,
74 FT_CR_UESP
* 4, FT_CR_EBP
* 4, FT_CR_ESI
* 4, FT_CR_EDI
* 4,
75 FT_CR_EIP
* 4, FT_CR_EFL
* 4, FT_CR_CS
* 4, FT_CR_SS
* 4,
76 FT_CR_DS
* 4, FT_CR_ES
* 4, FT_CR_FS
* 4, FT_CR_GS
* 4
80 supply_fast_tracepoint_registers (struct regcache
*regcache
,
81 const unsigned char *buf
)
85 for (i
= 0; i
< i386_num_regs
; i
++)
89 if (i
>= I386_CS_REGNUM
&& i
<= I386_GS_REGNUM
)
90 regval
= *(short *) (((char *) buf
) + i386_ft_collect_regmap
[i
]);
92 regval
= *(int *) (((char *) buf
) + i386_ft_collect_regmap
[i
]);
94 supply_register (regcache
, i
, ®val
);
98 ULONGEST
__attribute__ ((visibility("default"), used
))
99 gdb_agent_get_raw_reg (unsigned char *raw_regs
, int regnum
)
101 /* This should maybe be allowed to return an error code, or perhaps
102 better, have the emit_reg detect this, and emit a constant zero,
105 if (regnum
> i386_num_regs
)
107 else if (regnum
>= I386_CS_REGNUM
&& regnum
<= I386_GS_REGNUM
)
108 return *(short *) (raw_regs
+ i386_ft_collect_regmap
[regnum
]);
110 return *(int *) (raw_regs
+ i386_ft_collect_regmap
[regnum
]);
115 #include <ust/processor.h>
117 /* "struct registers" is the UST object type holding the registers at
118 the time of the static tracepoint marker call. This doesn't
119 contain EIP, but we know what it must have been (the marker
122 #define ST_REGENTRY(REG) \
124 offsetof (struct registers, REG), \
125 sizeof (((struct registers *) NULL)->REG) \
132 } i386_st_collect_regmap
[] =
148 #define i386_NUM_ST_COLLECT_GREGS \
149 (sizeof (i386_st_collect_regmap) / sizeof (i386_st_collect_regmap[0]))
152 supply_static_tracepoint_registers (struct regcache
*regcache
,
153 const unsigned char *buf
,
157 unsigned int newpc
= pc
;
159 supply_register (regcache
, I386_EIP_REGNUM
, &newpc
);
161 for (i
= 0; i
< i386_NUM_ST_COLLECT_GREGS
; i
++)
162 if (i386_st_collect_regmap
[i
].offset
!= -1)
164 switch (i386_st_collect_regmap
[i
].size
)
167 supply_register (regcache
, i
,
169 + i386_st_collect_regmap
[i
].offset
);
174 = * (short *) (((char *) buf
)
175 + i386_st_collect_regmap
[i
].offset
);
177 supply_register (regcache
, i
, ®
);
181 internal_error (__FILE__
, __LINE__
, "unhandled register size: %d",
182 i386_st_collect_regmap
[i
].size
);
187 #endif /* HAVE_UST */
190 /* This is only needed because reg-i386-linux-lib.o references it. We
191 may use it proper at some point. */
192 const char *gdbserver_xmltarget
;
195 initialize_low_tracepoint (void)
197 init_registers_i386_linux ();