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 #ifdef NEED_CPU_H
  14 typedef void (*gdb_syscall_complete_cb)(CPUState *cpu,
  15                                         target_ulong ret, target_ulong err);
  16
  17 /**
  18  * gdb_do_syscall:
  19  * @cb: function to call when the system call has completed
  20  * @fmt: gdb syscall format string
  21  * ...: list of arguments to interpolate into @fmt
  22  *
  23  * Send a GDB syscall request. This function will return immediately;
  24  * the callback function will be called later when the remote system
  25  * call has completed.
  26  *
  27  * @fmt should be in the 'call-id,parameter,parameter...' format documented
  28  * for the F request packet in the GDB remote protocol. A limited set of
  29  * printf-style format specifiers is supported:
  30  *   %x  - target_ulong argument printed in hex
  31  *   %lx - 64-bit argument printed in hex
  32  *   %s  - string pointer (target_ulong) and length (int) pair
  33  */
  34 void gdb_do_syscall(gdb_syscall_complete_cb cb, const char *fmt, ...);
  35 /**
  36  * gdb_do_syscallv:
  37  * @cb: function to call when the system call has completed
  38  * @fmt: gdb syscall format string
  39  * @va: arguments to interpolate into @fmt
  40  *
  41  * As gdb_do_syscall, but taking a va_list rather than a variable
  42  * argument list.
  43  */
  44 void gdb_do_syscallv(gdb_syscall_complete_cb cb, const char *fmt, va_list va);
  45 int use_gdb_syscalls(void);
  46 void gdb_set_stop_cpu(CPUState *cpu);
  47 void gdb_exit(CPUArchState *, int);
  48 #ifdef CONFIG_USER_ONLY
  49 int gdb_queuesig (void);
  50 int gdb_handlesig(CPUState *, int);
  51 void gdb_signalled(CPUArchState *, int);
  52 void gdbserver_fork(CPUState *);
  53 #endif
  54 /* Get or set a register.  Returns the size of the register.  */
  55 typedef int (*gdb_reg_cb)(CPUArchState *env, uint8_t *buf, int reg);
  56 void gdb_register_coprocessor(CPUState *cpu,
  57                               gdb_reg_cb get_reg, gdb_reg_cb set_reg,
  58                               int num_regs, const char *xml, int g_pos);
  59
  60 static inline int cpu_index(CPUState *cpu)
  61 {
  62 #if defined(CONFIG_USER_ONLY)
  63     return cpu->host_tid;
  64 #else
  65     return cpu->cpu_index + 1;
  66 #endif
  67 }
  68
  69 /* The GDB remote protocol transfers values in target byte order.  This means
  70  * we can use the raw memory access routines to access the value buffer.
  71  * Conveniently, these also handle the case where the buffer is mis-aligned.
  72  */
  73
  74 static inline int gdb_get_reg8(uint8_t *mem_buf, uint8_t val)
  75 {
  76     stb_p(mem_buf, val);
  77     return 1;
  78 }
  79
  80 static inline int gdb_get_reg16(uint8_t *mem_buf, uint16_t val)
  81 {
  82     stw_p(mem_buf, val);
  83     return 2;
  84 }
  85
  86 static inline int gdb_get_reg32(uint8_t *mem_buf, uint32_t val)
  87 {
  88     stl_p(mem_buf, val);
  89     return 4;
  90 }
  91
  92 static inline int gdb_get_reg64(uint8_t *mem_buf, uint64_t val)
  93 {
  94     stq_p(mem_buf, val);
  95     return 8;
  96 }
  97
  98 #if TARGET_LONG_BITS == 64
  99 #define gdb_get_regl(buf, val) gdb_get_reg64(buf, val)
 100 #define ldtul_p(addr) ldq_p(addr)
 101 #else
 102 #define gdb_get_regl(buf, val) gdb_get_reg32(buf, val)
 103 #define ldtul_p(addr) ldl_p(addr)
 104 #endif
 105
 106 #endif
 107
 108 #ifdef CONFIG_USER_ONLY
 109 int gdbserver_start(int);
 110 #else
 111 int gdbserver_start(const char *port);
 112 #endif
 113
 114 /**
 115  * gdb_has_xml:
 116  * This is an ugly hack to cope with both new and old gdb.
 117  * If gdb sends qXfer:features:read then assume we're talking to a newish
 118  * gdb that understands target descriptions.
 119  */
 120 extern bool gdb_has_xml;
 121
 122 /* in gdbstub-xml.c, generated by scripts/feature_to_c.sh */
 123 extern const char *const xml_builtin[][2];
 124
 125 #endif