Added command for reading value from memory

handlers.c

@@ -1615,6 +1615,109 @@ bool handler__write(globals_t * vars, char **argv, unsigned argc)
  return ret;
 }
 
+
+/* read value_type address */
+bool handler__read(globals_t * vars, char **argv, unsigned argc)
+{
+ FILE* pager = get_pager(stdout);
+
+ int data_width = 0;
+ const char *fmt = NULL;
+ void* buf = NULL;
+ void *addr;
+ bool ret;
+ int datatype;
+ char *endptr;
+
+ if (argc != 3)
+ {
+ show_error("bad arguments, see `help read`.\n");
+ ret = false;
+ goto retl;
+ }
+
+ scan_data_type_t st = parse_scan_data_type(argv[1]);
+
+ /* try int first */
+ if (st == INTEGER8)
+ {
+ data_width = 1;
+ datatype = 0;
+ fmt = "%"PRId8;
+ }
+ else if (st == INTEGER16)
+ {
+ data_width = 2;
+ datatype = 0;
+ fmt = "%"PRId16;
+ }
+ else if (st == INTEGER32)
+ {
+ data_width = 4;
+ datatype = 0;
+ fmt = "%"PRId32;
+ }
+ else if (st == INTEGER64)
+ {
+ data_width = 8;
+ datatype = 0;
+ fmt = "%"PRId64;
+ }
+ else if (st == FLOAT32)
+ {
+ data_width = 4;
+ datatype = 0;
+ fmt = "%f";
+ }
+ else if (st == FLOAT64)
+ {
+ data_width = 8;
+ datatype = 0;
+ fmt = "%lf";
+ }
+ else
+ {
+ show_error("bad data_type, see `help r`.\n");
+ ret = false;
+ goto retl;
+ }
+
+
+ errno = 0;
+ addr = (void *)(strtoll(argv[2], &endptr, 16));
+ if ((errno != 0) || (*endptr != '\0'))
+ {
+ show_error("bad address, see `help read`.\n");
+ ret = false;
+ goto retl;
+ }
+ st = parse_scan_data_type(argv[1]);
+
+ (void) datatype;
+
+ buf = malloc(data_width);
+
+ if (!sm_read_array(vars->target, addr, buf, data_width))
+ {
+ show_error("read memory failed.\n");
+ ret = false;
+ goto retl;
+ }
+ if (st == INTEGER8) fprintf(pager, fmt, *(int8_t*)buf);
+ if (st == INTEGER16) fprintf(pager, fmt, *(int16_t*)buf);
+ if (st == INTEGER32) fprintf(pager, fmt, *(int32_t*)buf);
+ if (st == INTEGER64) fprintf(pager, fmt, *(int64_t*)buf);
+ if (st == FLOAT32) fprintf(pager, fmt, *(float*)buf);
+ if (st == FLOAT64) fprintf(pager, fmt, *(double*)buf);
+
+ retl:
+
+ close_pager(pager);
+ if(buf)
+ free(buf);
+ return ret;
+}
+
 bool handler__option(globals_t * vars, char **argv, unsigned argc)
 {
  /* this might need to change */

handlers.h

@@ -330,6 +330,21 @@ bool handler__dump(globals_t *vars, char **argv, unsigned argc);
 
 bool handler__write(globals_t *vars, char **argv, unsigned argc);
 
+#define READ_COMPLETE VALUE_TYPES
+#define READ_SHRTDOC "read value of a specific memory location"
+#define READ_LONGDOC "usage: write <value_type> <address>\n" \
+ "\n" \
+ "Read <value_type> from <address>\n" \
+ "<value_type> should be one of:\n" \
+ "\tint{8|16|32|64} (or i{8|16|32|64} for short)\n" \
+ "\tfloat{32|64} (or f{32|64} for short)\n" \
+ "\n" \
+ "Example:\n" \
+ "\tread i16 60103e\n" \
+ "\tread float32 60103e\n" 
+
+bool handler__read(globals_t *vars, char **argv, unsigned argc);
+
 #define OPTION_COMPLETE "scan_data_type{number,int,float," VALUE_TYPES \
  "},region_scan_level{1,2,3},dump_with_ascii{0,1},endianness{0,1,2}"
 #define OPTION_SHRTDOC "set runtime options of scanmem, see `help option`"

scanmem.c

@@ -181,6 +181,8 @@ bool sm_init(void)
  SHOW_LONGDOC, SHOW_COMPLETE);
  sm_registercommand("dump", handler__dump, vars->commands, DUMP_SHRTDOC,
  DUMP_LONGDOC, NULL);
+ sm_registercommand("read", handler__read, vars->commands, READ_SHRTDOC,
+ READ_LONGDOC, READ_COMPLETE);
  sm_registercommand("write", handler__write, vars->commands, WRITE_SHRTDOC,
  WRITE_LONGDOC, WRITE_COMPLETE);
  sm_registercommand("option", handler__option, vars->commands, OPTION_SHRTDOC,