203 lines
6 KiB
C
203 lines
6 KiB
C
#ifndef GDBSTUB_H
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#define GDBSTUB_H
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#define DEFAULT_GDBSTUB_PORT "1234"
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/* GDB breakpoint/watchpoint types */
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#define GDB_BREAKPOINT_SW 0
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#define GDB_BREAKPOINT_HW 1
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#define GDB_WATCHPOINT_WRITE 2
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#define GDB_WATCHPOINT_READ 3
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#define GDB_WATCHPOINT_ACCESS 4
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#ifdef NEED_CPU_H
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#include "cpu.h"
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typedef void (*gdb_syscall_complete_cb)(CPUState *cpu,
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target_ulong ret, target_ulong err);
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/**
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* gdb_do_syscall:
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* @cb: function to call when the system call has completed
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* @fmt: gdb syscall format string
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* ...: list of arguments to interpolate into @fmt
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*
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* Send a GDB syscall request. This function will return immediately;
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* the callback function will be called later when the remote system
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* call has completed.
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*
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* @fmt should be in the 'call-id,parameter,parameter...' format documented
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* for the F request packet in the GDB remote protocol. A limited set of
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* printf-style format specifiers is supported:
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* %x - target_ulong argument printed in hex
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* %lx - 64-bit argument printed in hex
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* %s - string pointer (target_ulong) and length (int) pair
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*/
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void gdb_do_syscall(gdb_syscall_complete_cb cb, const char *fmt, ...);
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/**
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* gdb_do_syscallv:
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* @cb: function to call when the system call has completed
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* @fmt: gdb syscall format string
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* @va: arguments to interpolate into @fmt
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*
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* As gdb_do_syscall, but taking a va_list rather than a variable
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* argument list.
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*/
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void gdb_do_syscallv(gdb_syscall_complete_cb cb, const char *fmt, va_list va);
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int use_gdb_syscalls(void);
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void gdb_set_stop_cpu(CPUState *cpu);
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void gdb_exit(CPUArchState *, int);
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#ifdef CONFIG_USER_ONLY
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/**
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* gdb_handlesig: yield control to gdb
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* @cpu: CPU
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* @sig: if non-zero, the signal number which caused us to stop
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*
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* This function yields control to gdb, when a user-mode-only target
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* needs to stop execution. If @sig is non-zero, then we will send a
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* stop packet to tell gdb that we have stopped because of this signal.
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*
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* This function will block (handling protocol requests from gdb)
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* until gdb tells us to continue target execution. When it does
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* return, the return value is a signal to deliver to the target,
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* or 0 if no signal should be delivered, ie the signal that caused
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* us to stop should be ignored.
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*/
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int gdb_handlesig(CPUState *, int);
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void gdb_signalled(CPUArchState *, int);
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void gdbserver_fork(CPUState *);
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#endif
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/* Get or set a register. Returns the size of the register. */
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typedef int (*gdb_get_reg_cb)(CPUArchState *env, GByteArray *buf, int reg);
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typedef int (*gdb_set_reg_cb)(CPUArchState *env, uint8_t *buf, int reg);
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void gdb_register_coprocessor(CPUState *cpu,
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gdb_get_reg_cb get_reg, gdb_set_reg_cb set_reg,
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int num_regs, const char *xml, int g_pos);
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/*
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* The GDB remote protocol transfers values in target byte order. As
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* the gdbstub may be batching up several register values we always
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* append to the array.
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*/
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static inline int gdb_get_reg8(GByteArray *buf, uint8_t val)
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{
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g_byte_array_append(buf, &val, 1);
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return 1;
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}
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static inline int gdb_get_reg16(GByteArray *buf, uint16_t val)
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{
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uint16_t to_word = tswap16(val);
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g_byte_array_append(buf, (uint8_t *) &to_word, 2);
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return 2;
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}
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static inline int gdb_get_reg32(GByteArray *buf, uint32_t val)
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{
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uint32_t to_long = tswap32(val);
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g_byte_array_append(buf, (uint8_t *) &to_long, 4);
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return 4;
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}
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static inline int gdb_get_reg64(GByteArray *buf, uint64_t val)
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{
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uint64_t to_quad = tswap64(val);
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g_byte_array_append(buf, (uint8_t *) &to_quad, 8);
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return 8;
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}
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static inline int gdb_get_reg128(GByteArray *buf, uint64_t val_hi,
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uint64_t val_lo)
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{
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uint64_t to_quad;
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#ifdef TARGET_WORDS_BIGENDIAN
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to_quad = tswap64(val_hi);
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g_byte_array_append(buf, (uint8_t *) &to_quad, 8);
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to_quad = tswap64(val_lo);
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g_byte_array_append(buf, (uint8_t *) &to_quad, 8);
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#else
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to_quad = tswap64(val_lo);
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g_byte_array_append(buf, (uint8_t *) &to_quad, 8);
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to_quad = tswap64(val_hi);
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g_byte_array_append(buf, (uint8_t *) &to_quad, 8);
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#endif
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return 16;
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}
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static inline int gdb_get_float32(GByteArray *array, float32 val)
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{
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uint8_t buf[sizeof(CPU_FloatU)];
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stfl_p(buf, val);
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g_byte_array_append(array, buf, sizeof(buf));
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return sizeof(buf);
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}
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static inline int gdb_get_float64(GByteArray *array, float64 val)
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{
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uint8_t buf[sizeof(CPU_DoubleU)];
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stfq_p(buf, val);
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g_byte_array_append(array, buf, sizeof(buf));
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return sizeof(buf);
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}
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static inline int gdb_get_zeroes(GByteArray *array, size_t len)
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{
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guint oldlen = array->len;
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g_byte_array_set_size(array, oldlen + len);
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memset(array->data + oldlen, 0, len);
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return len;
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}
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/**
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* gdb_get_reg_ptr: get pointer to start of last element
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* @len: length of element
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*
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* This is a helper function to extract the pointer to the last
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* element for additional processing. Some front-ends do additional
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* dynamic swapping of the elements based on CPU state.
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*/
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static inline uint8_t * gdb_get_reg_ptr(GByteArray *buf, int len)
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{
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return buf->data + buf->len - len;
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}
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#if TARGET_LONG_BITS == 64
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#define gdb_get_regl(buf, val) gdb_get_reg64(buf, val)
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#define ldtul_p(addr) ldq_p(addr)
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#else
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#define gdb_get_regl(buf, val) gdb_get_reg32(buf, val)
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#define ldtul_p(addr) ldl_p(addr)
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#endif
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#endif
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/**
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* gdbserver_start: start the gdb server
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* @port_or_device: connection spec for gdb
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*
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* For CONFIG_USER this is either a tcp port or a path to a fifo. For
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* system emulation you can use a full chardev spec for your gdbserver
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* port.
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*/
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int gdbserver_start(const char *port_or_device);
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void gdbserver_cleanup(void);
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/**
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* gdb_has_xml:
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* This is an ugly hack to cope with both new and old gdb.
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* If gdb sends qXfer:features:read then assume we're talking to a newish
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* gdb that understands target descriptions.
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*/
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extern bool gdb_has_xml;
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/* in gdbstub-xml.c, generated by scripts/feature_to_c.sh */
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extern const char *const xml_builtin[][2];
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#endif
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