gdbstub: Make hex conversion function non-internal

Make gdb_hextomem non-internal so it's not confined to use only in
gdbstub.c.

Signed-off-by: Gustavo Romero <gustavo.romero@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20240628050850.536447-8-gustavo.romero@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20240705084047.857176-37-alex.bennee@linaro.org>

gdbstub/internals.h

@@ -107,7 +107,6 @@ static inline int tohex(int v)
 
 void gdb_put_strbuf(void);
 int gdb_put_packet_binary(const char *buf, int len, bool dump);
-void gdb_hextomem(GByteArray *mem, const char *buf, int len);
 void gdb_memtohex(GString *buf, const uint8_t *mem, int len);
 void gdb_memtox(GString *buf, const char *mem, int len);
 void gdb_read_byte(uint8_t ch);

include/gdbstub/commands.h

@@ -91,4 +91,10 @@ void gdb_extend_set_table(GdbCmdParseEntry *table, int size);
  */
 void gdb_extend_qsupported_features(char *qsupported_features);
 
+/**
+ * Convert a hex string to bytes. Conversion is done per byte, so 2 hex digits
+ * are converted to 1 byte. Invalid hex digits are treated as 0 digits.
+ */
+void gdb_hextomem(GByteArray *mem, const char *buf, int len);
+
 #endif /* GDBSTUB_COMMANDS_H */