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Simplify the handle_md_command routine in target.c: 

- fix buffer overrun in mdw; final '\0' would overflow the output buffer.
 - return ERROR_COMMAND_SYNTAX_ERROR instead of ERROR_OK if:
   - less than one argument is provided
   - the command is called with a name other than mdb, mdh, or mdw.
 - factor all command output into new handle_md_output function


git-svn-id: svn://svn.berlios.de/openocd/trunk@1958 b42882b7-edfa-0310-969c-e2dbd0fdcd60
__archive__
zwelch 2009-05-31 06:00:28 +00:00
parent 55f21192b0
commit 6785193118
1 changed files with 66 additions and 63 deletions
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129
src/target/target.c
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@ -1844,77 +1844,80 @@ static int handle_step_command(struct command_context_s *cmd_ctx, char *cmd, cha
return ERROR_OK;
}
static void handle_md_output(struct command_context_s *cmd_ctx,
struct target_s *target, u32 address, unsigned size,
unsigned count, const u8 *buffer)
{
const unsigned line_bytecnt = 32;
unsigned line_modulo = line_bytecnt / size;
char output[line_bytecnt * 4 + 1];
unsigned output_len = 0;
const char *value_fmt;
switch (size) {
case 4: value_fmt = "%8.8x"; break;
case 2: value_fmt = "%4.2x"; break;
case 1: value_fmt = "%2.2x"; break;
default:
LOG_ERROR("invalid memory read size: %u", size);
exit(-1);
}
for (unsigned i = 0; i < count; i++)
{
if (i % line_modulo == 0)
{
output_len += snprintf(output + output_len,
sizeof(output) - output_len,
"0x%8.8x: ", address + (i*size));
}
u32 value;
const u8 *value_ptr = buffer + i * size;
switch (size) {
case 4: value = target_buffer_get_u32(target, value_ptr); break;
case 2: value = target_buffer_get_u16(target, value_ptr); break;
case 1: value = *value_ptr;
}
output_len += snprintf(output + output_len,
sizeof(output) - output_len,
value_fmt, value);
if ((i % line_modulo == line_modulo - 1) || (i == count - 1))
{
command_print(cmd_ctx, "%s", output);
output_len = 0;
}
}
}
static int handle_md_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
const int line_bytecnt = 32;
int count = 1;
int size = 4;
u32 address = 0;
int line_modulo;
int i;
char output[128];
int output_len;
int retval;
u8 *buffer;
target_t *target = get_current_target(cmd_ctx);
if (argc < 1)
return ERROR_OK;
return ERROR_COMMAND_SYNTAX_ERROR;
unsigned size = 0;
switch (cmd[2]) {
case 'w': size = 4; break;
case 'h': size = 2; break;
case 'b': size = 1; break;
default: return ERROR_COMMAND_SYNTAX_ERROR;
}
u32 address = strtoul(args[0], NULL, 0);
unsigned count = 1;
if (argc == 2)
count = strtoul(args[1], NULL, 0);
address = strtoul(args[0], NULL, 0);
u8 *buffer = calloc(count, size);
switch (cmd[2])
{
case 'w':
size = 4; line_modulo = line_bytecnt / 4;
break;
case 'h':
size = 2; line_modulo = line_bytecnt / 2;
break;
case 'b':
size = 1; line_modulo = line_bytecnt / 1;
break;
default:
return ERROR_OK;
}
buffer = calloc(count, size);
retval = target->type->read_memory(target, address, size, count, buffer);
if (retval == ERROR_OK)
{
output_len = 0;
for (i = 0; i < count; i++)
{
if (i%line_modulo == 0)
output_len += snprintf(output + output_len, 128 - output_len, "0x%8.8x: ", address + (i*size));
switch (size)
{
case 4:
output_len += snprintf(output + output_len, 128 - output_len, "%8.8x ", target_buffer_get_u32(target, &buffer[i*4]));
break;
case 2:
output_len += snprintf(output + output_len, 128 - output_len, "%4.4x ", target_buffer_get_u16(target, &buffer[i*2]));
break;
case 1:
output_len += snprintf(output + output_len, 128 - output_len, "%2.2x ", buffer[i*1]);
break;
}
if ((i%line_modulo == line_modulo-1) || (i == count - 1))
{
command_print(cmd_ctx, "%s", output);
output_len = 0;
}
}
}
target_t *target = get_current_target(cmd_ctx);
int retval = target->type->read_memory(target,
address, size, count, buffer);
if (ERROR_OK == retval)
handle_md_output(cmd_ctx, target, address, size, count, buffer);
free(buffer);