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2002-01-15 Michael Snyder <msnyder@redhat.com>

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* target.c: New command, "set trust-readonly-sections on".
	(do_xfer_memory): Honor the suggestion to trust readonly sections
	by reading them from the object file instead of from the target.
	(initialize_targets): Register command "set trust-readonly-sections".
This commit is contained in:
Michael Snyder 2002-01-31 02:31:06 +00:00
parent 2c955b8b61
commit 3a11626da1
2 changed files with 42 additions and 5 deletions
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7
gdb/ChangeLog
View file

@ -1,3 +1,10 @@
2002-01-15 Michael Snyder <msnyder@redhat.com>
* target.c: New command, "set trust-readonly-sections on".
(do_xfer_memory): Honor the suggestion to trust readonly sections
by reading them from the object file instead of from the target.
(initialize_targets): Register command "set trust-readonly-sections".
2002-01-29 Andrew Cagney <ac131313@redhat.com>
* parse.c (target_map_name_to_register): Simplify, search regs and

40
gdb/target.c
View file

@ -835,6 +835,8 @@ target_write_memory (CORE_ADDR memaddr, char *myaddr, int len)
return target_xfer_memory (memaddr, myaddr, len, 1);
}
static int trust_readonly = 0;
/* Move memory to or from the targets. The top target gets priority;
if it cannot handle it, it is offered to the next one down, etc.
@ -857,6 +859,24 @@ do_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int write,
0. */
errno = 0;
if (!write && trust_readonly)
{
/* User-settable option, "trust-readonly". If true, then
memory from any SEC_READONLY bfd section may be read
directly from the bfd file. */
struct section_table *secp;
for (secp = current_target.to_sections;
secp < current_target.to_sections_end;
secp++)
{
if (memaddr >= secp->addr && memaddr < secp->endaddr)
return xfer_memory (memaddr, myaddr, len, 0,
attrib, &current_target);
}
}
/* The quick case is that the top target can handle the transfer. */
res = current_target.to_xfer_memory
(memaddr, myaddr, len, write, attrib, &current_target);
@ -2254,13 +2274,23 @@ initialize_targets (void)
add_info ("target", target_info, targ_desc);
add_info ("files", target_info, targ_desc);
add_show_from_set (
add_set_cmd ("target", class_maintenance, var_zinteger,
(char *) &targetdebug,
"Set target debugging.\n\
add_show_from_set
(add_set_cmd ("target", class_maintenance, var_zinteger,
(char *) &targetdebug,
"Set target debugging.\n\
When non-zero, target debugging is enabled.", &setdebuglist),
&showdebuglist);
&showdebuglist);
add_show_from_set
(add_set_boolean_cmd
("trust-readonly-sections", class_support,
&trust_readonly,
"Set mode for reading from readonly sections.\n\
When this mode is on, memory reads from readonly sections (such as .text)\n\
will be read from the object file instead of from the target. This will\n\
result in significant performance improvement for remote targets.",
&setlist),
&showlist);
add_com ("monitor", class_obscure, do_monitor_command,
"Send a command to the remote monitor (remote targets only).");