1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
|
#ifndef GDBSTUB_H
#define GDBSTUB_H
#define DEFAULT_GDBSTUB_PORT "1234"
/* GDB breakpoint/watchpoint types */
#define GDB_BREAKPOINT_SW 0
#define GDB_BREAKPOINT_HW 1
#define GDB_WATCHPOINT_WRITE 2
#define GDB_WATCHPOINT_READ 3
#define GDB_WATCHPOINT_ACCESS 4
#ifdef NEED_CPU_H
#include "cpu.h"
typedef void (*gdb_syscall_complete_cb)(CPUState *cpu,
target_ulong ret, target_ulong err);
/**
* gdb_do_syscall:
* @cb: function to call when the system call has completed
* @fmt: gdb syscall format string
* ...: list of arguments to interpolate into @fmt
*
* Send a GDB syscall request. This function will return immediately;
* the callback function will be called later when the remote system
* call has completed.
*
* @fmt should be in the 'call-id,parameter,parameter...' format documented
* for the F request packet in the GDB remote protocol. A limited set of
* printf-style format specifiers is supported:
* %x - target_ulong argument printed in hex
* %lx - 64-bit argument printed in hex
* %s - string pointer (target_ulong) and length (int) pair
*/
void gdb_do_syscall(gdb_syscall_complete_cb cb, const char *fmt, ...);
/**
* gdb_do_syscallv:
* @cb: function to call when the system call has completed
* @fmt: gdb syscall format string
* @va: arguments to interpolate into @fmt
*
* As gdb_do_syscall, but taking a va_list rather than a variable
* argument list.
*/
void gdb_do_syscallv(gdb_syscall_complete_cb cb, const char *fmt, va_list va);
int use_gdb_syscalls(void);
void gdb_set_stop_cpu(CPUState *cpu);
/**
* gdb_exit: exit gdb session, reporting inferior status
* @code: exit code reported
*
* This closes the session and sends a final packet to GDB reporting
* the exit status of the program. It also cleans up any connections
* detritus before returning.
*/
void gdb_exit(int code);
#ifdef CONFIG_USER_ONLY
/**
* gdb_handlesig: yield control to gdb
* @cpu: CPU
* @sig: if non-zero, the signal number which caused us to stop
*
* This function yields control to gdb, when a user-mode-only target
* needs to stop execution. If @sig is non-zero, then we will send a
* stop packet to tell gdb that we have stopped because of this signal.
*
* This function will block (handling protocol requests from gdb)
* until gdb tells us to continue target execution. When it does
* return, the return value is a signal to deliver to the target,
* or 0 if no signal should be delivered, ie the signal that caused
* us to stop should be ignored.
*/
int gdb_handlesig(CPUState *, int);
void gdb_signalled(CPUArchState *, int);
void gdbserver_fork(CPUState *);
#endif
/* Get or set a register. Returns the size of the register. */
typedef int (*gdb_get_reg_cb)(CPUArchState *env, GByteArray *buf, int reg);
typedef int (*gdb_set_reg_cb)(CPUArchState *env, uint8_t *buf, int reg);
void gdb_register_coprocessor(CPUState *cpu,
gdb_get_reg_cb get_reg, gdb_set_reg_cb set_reg,
int num_regs, const char *xml, int g_pos);
/*
* The GDB remote protocol transfers values in target byte order. As
* the gdbstub may be batching up several register values we always
* append to the array.
*/
static inline int gdb_get_reg8(GByteArray *buf, uint8_t val)
{
g_byte_array_append(buf, &val, 1);
return 1;
}
static inline int gdb_get_reg16(GByteArray *buf, uint16_t val)
{
uint16_t to_word = tswap16(val);
g_byte_array_append(buf, (uint8_t *) &to_word, 2);
return 2;
}
static inline int gdb_get_reg32(GByteArray *buf, uint32_t val)
{
uint32_t to_long = tswap32(val);
g_byte_array_append(buf, (uint8_t *) &to_long, 4);
return 4;
}
static inline int gdb_get_reg64(GByteArray *buf, uint64_t val)
{
uint64_t to_quad = tswap64(val);
g_byte_array_append(buf, (uint8_t *) &to_quad, 8);
return 8;
}
static inline int gdb_get_reg128(GByteArray *buf, uint64_t val_hi,
uint64_t val_lo)
{
uint64_t to_quad;
#ifdef TARGET_WORDS_BIGENDIAN
to_quad = tswap64(val_hi);
g_byte_array_append(buf, (uint8_t *) &to_quad, 8);
to_quad = tswap64(val_lo);
g_byte_array_append(buf, (uint8_t *) &to_quad, 8);
#else
to_quad = tswap64(val_lo);
g_byte_array_append(buf, (uint8_t *) &to_quad, 8);
to_quad = tswap64(val_hi);
g_byte_array_append(buf, (uint8_t *) &to_quad, 8);
#endif
return 16;
}
static inline int gdb_get_float32(GByteArray *array, float32 val)
{
uint8_t buf[sizeof(CPU_FloatU)];
stfl_p(buf, val);
g_byte_array_append(array, buf, sizeof(buf));
return sizeof(buf);
}
static inline int gdb_get_float64(GByteArray *array, float64 val)
{
uint8_t buf[sizeof(CPU_DoubleU)];
stfq_p(buf, val);
g_byte_array_append(array, buf, sizeof(buf));
return sizeof(buf);
}
static inline int gdb_get_zeroes(GByteArray *array, size_t len)
{
guint oldlen = array->len;
g_byte_array_set_size(array, oldlen + len);
memset(array->data + oldlen, 0, len);
return len;
}
/**
* gdb_get_reg_ptr: get pointer to start of last element
* @len: length of element
*
* This is a helper function to extract the pointer to the last
* element for additional processing. Some front-ends do additional
* dynamic swapping of the elements based on CPU state.
*/
static inline uint8_t * gdb_get_reg_ptr(GByteArray *buf, int len)
{
return buf->data + buf->len - len;
}
#if TARGET_LONG_BITS == 64
#define gdb_get_regl(buf, val) gdb_get_reg64(buf, val)
#define ldtul_p(addr) ldq_p(addr)
#else
#define gdb_get_regl(buf, val) gdb_get_reg32(buf, val)
#define ldtul_p(addr) ldl_p(addr)
#endif
#endif
/**
* gdbserver_start: start the gdb server
* @port_or_device: connection spec for gdb
*
* For CONFIG_USER this is either a tcp port or a path to a fifo. For
* system emulation you can use a full chardev spec for your gdbserver
* port.
*/
int gdbserver_start(const char *port_or_device);
/**
* gdb_has_xml:
* This is an ugly hack to cope with both new and old gdb.
* If gdb sends qXfer:features:read then assume we're talking to a newish
* gdb that understands target descriptions.
*/
extern bool gdb_has_xml;
/* in gdbstub-xml.c, generated by scripts/feature_to_c.sh */
extern const char *const xml_builtin[][2];
#endif
|
