diff options
| -rw-r--r-- | gdb/ChangeLog | 7 | ||||
| -rw-r--r-- | gdb/target.c | 42 |
2 files changed, 43 insertions, 6 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog index b2068fa0f51..27dfeb0ca3c 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -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 diff --git a/gdb/target.c b/gdb/target.c index 1af88838f2b..95ec4ef650a 100644 --- a/gdb/target.c +++ b/gdb/target.c @@ -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, ¤t_target); + } + } + /* The quick case is that the top target can handle the transfer. */ res = current_target.to_xfer_memory (memaddr, myaddr, len, write, attrib, ¤t_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)."); |