include/exec/gdbstub.h

   1 #ifndef GDBSTUB_H
   2 #define GDBSTUB_H
   3
   4 #define DEFAULT_GDBSTUB_PORT "1234"
   5
   6 /* GDB breakpoint/watchpoint types */
   7 #define GDB_BREAKPOINT_SW        0
   8 #define GDB_BREAKPOINT_HW        1
   9 #define GDB_WATCHPOINT_WRITE     2
  10 #define GDB_WATCHPOINT_READ      3
  11 #define GDB_WATCHPOINT_ACCESS    4
  12
  13 /* For gdb file i/o remote protocol open flags. */
  14 #define GDB_O_RDONLY  0
  15 #define GDB_O_WRONLY  1
  16 #define GDB_O_RDWR    2
  17 #define GDB_O_APPEND  8
  18 #define GDB_O_CREAT   0x200
  19 #define GDB_O_TRUNC   0x400
  20 #define GDB_O_EXCL    0x800
  21
  22 /* For gdb file i/o remote protocol errno values */
  23 #define GDB_EPERM           1
  24 #define GDB_ENOENT          2
  25 #define GDB_EINTR           4
  26 #define GDB_EBADF           9
  27 #define GDB_EACCES         13
  28 #define GDB_EFAULT         14
  29 #define GDB_EBUSY          16
  30 #define GDB_EEXIST         17
  31 #define GDB_ENODEV         19
  32 #define GDB_ENOTDIR        20
  33 #define GDB_EISDIR         21
  34 #define GDB_EINVAL         22
  35 #define GDB_ENFILE         23
  36 #define GDB_EMFILE         24
  37 #define GDB_EFBIG          27
  38 #define GDB_ENOSPC         28
  39 #define GDB_ESPIPE         29
  40 #define GDB_EROFS          30
  41 #define GDB_ENAMETOOLONG   91
  42 #define GDB_EUNKNOWN       9999
  43
  44 /* For gdb file i/o remote protocol lseek whence. */
  45 #define GDB_SEEK_SET  0
  46 #define GDB_SEEK_CUR  1
  47 #define GDB_SEEK_END  2
  48
  49 /* For gdb file i/o stat/fstat. */
  50 typedef uint32_t gdb_mode_t;
  51 typedef uint32_t gdb_time_t;
  52
  53 struct gdb_stat {
  54   uint32_t    gdb_st_dev;     /* device */
  55   uint32_t    gdb_st_ino;     /* inode */
  56   gdb_mode_t  gdb_st_mode;    /* protection */
  57   uint32_t    gdb_st_nlink;   /* number of hard links */
  58   uint32_t    gdb_st_uid;     /* user ID of owner */
  59   uint32_t    gdb_st_gid;     /* group ID of owner */
  60   uint32_t    gdb_st_rdev;    /* device type (if inode device) */
  61   uint64_t    gdb_st_size;    /* total size, in bytes */
  62   uint64_t    gdb_st_blksize; /* blocksize for filesystem I/O */
  63   uint64_t    gdb_st_blocks;  /* number of blocks allocated */
  64   gdb_time_t  gdb_st_atime;   /* time of last access */
  65   gdb_time_t  gdb_st_mtime;   /* time of last modification */
  66   gdb_time_t  gdb_st_ctime;   /* time of last change */
  67 } QEMU_PACKED;
  68
  69 struct gdb_timeval {
  70   gdb_time_t tv_sec;  /* second */
  71   uint64_t tv_usec;   /* microsecond */
  72 } QEMU_PACKED;
  73
  74 #ifdef NEED_CPU_H
  75 #include "cpu.h"
  76
  77 typedef void (*gdb_syscall_complete_cb)(CPUState *cpu, uint64_t ret, int err);
  78
  79 /**
  80  * gdb_do_syscall:
  81  * @cb: function to call when the system call has completed
  82  * @fmt: gdb syscall format string
  83  * ...: list of arguments to interpolate into @fmt
  84  *
  85  * Send a GDB syscall request. This function will return immediately;
  86  * the callback function will be called later when the remote system
  87  * call has completed.
  88  *
  89  * @fmt should be in the 'call-id,parameter,parameter...' format documented
  90  * for the F request packet in the GDB remote protocol. A limited set of
  91  * printf-style format specifiers is supported:
  92  *   %x  - target_ulong argument printed in hex
  93  *   %lx - 64-bit argument printed in hex
  94  *   %s  - string pointer (target_ulong) and length (int) pair
  95  */
  96 void gdb_do_syscall(gdb_syscall_complete_cb cb, const char *fmt, ...);
  97 /**
  98  * gdb_do_syscallv:
  99  * @cb: function to call when the system call has completed
 100  * @fmt: gdb syscall format string
 101  * @va: arguments to interpolate into @fmt
 102  *
 103  * As gdb_do_syscall, but taking a va_list rather than a variable
 104  * argument list.
 105  */
 106 void gdb_do_syscallv(gdb_syscall_complete_cb cb, const char *fmt, va_list va);
 107 int use_gdb_syscalls(void);
 108
 109 #ifdef CONFIG_USER_ONLY
 110 /**
 111  * gdb_handlesig: yield control to gdb
 112  * @cpu: CPU
 113  * @sig: if non-zero, the signal number which caused us to stop
 114  *
 115  * This function yields control to gdb, when a user-mode-only target
 116  * needs to stop execution. If @sig is non-zero, then we will send a
 117  * stop packet to tell gdb that we have stopped because of this signal.
 118  *
 119  * This function will block (handling protocol requests from gdb)
 120  * until gdb tells us to continue target execution. When it does
 121  * return, the return value is a signal to deliver to the target,
 122  * or 0 if no signal should be delivered, ie the signal that caused
 123  * us to stop should be ignored.
 124  */
 125 int gdb_handlesig(CPUState *, int);
 126 void gdb_signalled(CPUArchState *, int);
 127 void gdbserver_fork(CPUState *);
 128 #endif
 129 /* Get or set a register.  Returns the size of the register.  */
 130 typedef int (*gdb_get_reg_cb)(CPUArchState *env, GByteArray *buf, int reg);
 131 typedef int (*gdb_set_reg_cb)(CPUArchState *env, uint8_t *buf, int reg);
 132 void gdb_register_coprocessor(CPUState *cpu,
 133                               gdb_get_reg_cb get_reg, gdb_set_reg_cb set_reg,
 134                               int num_regs, const char *xml, int g_pos);
 135
 136 /*
 137  * The GDB remote protocol transfers values in target byte order. As
 138  * the gdbstub may be batching up several register values we always
 139  * append to the array.
 140  */
 141
 142 static inline int gdb_get_reg8(GByteArray *buf, uint8_t val)
 143 {
 144     g_byte_array_append(buf, &val, 1);
 145     return 1;
 146 }
 147
 148 static inline int gdb_get_reg16(GByteArray *buf, uint16_t val)
 149 {
 150     uint16_t to_word = tswap16(val);
 151     g_byte_array_append(buf, (uint8_t *) &to_word, 2);
 152     return 2;
 153 }
 154
 155 static inline int gdb_get_reg32(GByteArray *buf, uint32_t val)
 156 {
 157     uint32_t to_long = tswap32(val);
 158     g_byte_array_append(buf, (uint8_t *) &to_long, 4);
 159     return 4;
 160 }
 161
 162 static inline int gdb_get_reg64(GByteArray *buf, uint64_t val)
 163 {
 164     uint64_t to_quad = tswap64(val);
 165     g_byte_array_append(buf, (uint8_t *) &to_quad, 8);
 166     return 8;
 167 }
 168
 169 static inline int gdb_get_reg128(GByteArray *buf, uint64_t val_hi,
 170                                  uint64_t val_lo)
 171 {
 172     uint64_t to_quad;
 173 #if TARGET_BIG_ENDIAN
 174     to_quad = tswap64(val_hi);
 175     g_byte_array_append(buf, (uint8_t *) &to_quad, 8);
 176     to_quad = tswap64(val_lo);
 177     g_byte_array_append(buf, (uint8_t *) &to_quad, 8);
 178 #else
 179     to_quad = tswap64(val_lo);
 180     g_byte_array_append(buf, (uint8_t *) &to_quad, 8);
 181     to_quad = tswap64(val_hi);
 182     g_byte_array_append(buf, (uint8_t *) &to_quad, 8);
 183 #endif
 184     return 16;
 185 }
 186
 187 static inline int gdb_get_zeroes(GByteArray *array, size_t len)
 188 {
 189     guint oldlen = array->len;
 190     g_byte_array_set_size(array, oldlen + len);
 191     memset(array->data + oldlen, 0, len);
 192
 193     return len;
 194 }
 195
 196 /**
 197  * gdb_get_reg_ptr: get pointer to start of last element
 198  * @len: length of element
 199  *
 200  * This is a helper function to extract the pointer to the last
 201  * element for additional processing. Some front-ends do additional
 202  * dynamic swapping of the elements based on CPU state.
 203  */
 204 static inline uint8_t * gdb_get_reg_ptr(GByteArray *buf, int len)
 205 {
 206     return buf->data + buf->len - len;
 207 }
 208
 209 #if TARGET_LONG_BITS == 64
 210 #define gdb_get_regl(buf, val) gdb_get_reg64(buf, val)
 211 #define ldtul_p(addr) ldq_p(addr)
 212 #else
 213 #define gdb_get_regl(buf, val) gdb_get_reg32(buf, val)
 214 #define ldtul_p(addr) ldl_p(addr)
 215 #endif
 216
 217 #endif /* NEED_CPU_H */
 218
 219 /**
 220  * gdbserver_start: start the gdb server
 221  * @port_or_device: connection spec for gdb
 222  *
 223  * For CONFIG_USER this is either a tcp port or a path to a fifo. For
 224  * system emulation you can use a full chardev spec for your gdbserver
 225  * port.
 226  */
 227 int gdbserver_start(const char *port_or_device);
 228
 229 /**
 230  * gdb_exit: exit gdb session, reporting inferior status
 231  * @code: exit code reported
 232  *
 233  * This closes the session and sends a final packet to GDB reporting
 234  * the exit status of the program. It also cleans up any connections
 235  * detritus before returning.
 236  */
 237 void gdb_exit(int code);
 238
 239 void gdb_set_stop_cpu(CPUState *cpu);
 240
 241 /**
 242  * gdb_has_xml:
 243  * This is an ugly hack to cope with both new and old gdb.
 244  * If gdb sends qXfer:features:read then assume we're talking to a newish
 245  * gdb that understands target descriptions.
 246  */
 247 extern bool gdb_has_xml;
 248
 249 /* in gdbstub-xml.c, generated by scripts/feature_to_c.sh */
 250 extern const char *const xml_builtin[][2];
 251
 252 #endif