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we don't need to know the build path of command.c when
reading normal user level error messages.
Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
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Based on notes from Tomek Cedro <tomek.cedro@gmail.com> and
Steve Franks <bahamasfranks@gmail.com>.
In the User's Guide, sort the list of operating systems reported
through Tcl with $ocd_HOSTOS ... and include FreeBSD.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
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Make "usage" messages use the same EBNF as the User's Guide;
no angle brackets. Improve and correct various helptexts.
Don't use "&function"; a function's name is its address.
Fix some whitespace glitches, shrink a few overlong lines.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
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Recent Apple gcc versions use __APPLE__ instead of __DARWIN__; accept
that too.
Also use #warning, not #warn; neither is standard, but most CPP versions
require it to be spelled out.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
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Most commands are usable only at runtime; so don't bother saying
that, it's noise. Moreover, tokens like EXEC are cryptic. Be
more clear: highlight only the commands which may (also) be used
during the config stage, thus matching the docs more closely.
There are
- Configuration commands (per documentation)
- And also some commands that valid at *any* time.
Update the docs to note that "help" now shows this mode info.
This also highlighted a few mistakes in command configuration,
mostly commands listed as "valid at any time" which shouldn't
have been. This just fixes ones I noted when sanity testing.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
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This makes it so that the usage/help command properly uses the whole command,
including subcommand, in the search for help information. This previously
caused erroneous output from the usage command handler.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
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I wanted to make it so I can be ignorant of a commands invocation string, so
I tried to use CMD_CURRENT (aka cmd->current) which is supposed to house a
pointer to the current command. It turns out that this wasn't being set.
This patch adds the current command structure to the command invocation
structure before sending it along to the command handler.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
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Restore behavior where help lists all commands that
match string passed to help.
Signed-off-by: Oyvind Harboe <oyvind.harboe@zylin.com>
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Changes from the flat namespace to heirarchical one. Instead of writing:
#include "target.h"
the following form should be used.
#include <target/target.h>
The exception is from .c files in the same directory.
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In embedded hosts, the Jim interpreter can come from the
existing context rather than be created by OpenOCD.
Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
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Ensures that the correct information gets displayed, depending on the
mode of the command being denied. Fixes misreporting all commands as
needing to run "before 'init'".
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Finish removing references to the 'interp' global variable from the
command module, encapsulating all reference via command_context.
Eliminates use of the global entirely, so it can be removed. Hurrah!
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Adds a log_capture_state structure to pass to the log capture
callback used by the command module. Ensures that the capture occurs
in the proper context.
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Adds 'interp' field to command_context, chasing the few remaining
references to the global variable outside of the command module.
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The 'help' text will become more verbose, so its entire text will be
far more than desired when you only borked your syntax. The usage
still allows the commands to be looked up for more help.
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command_done() does not need to return an error, but it needed
Doxygen comment. Provide some for copy_command_context as well.
Note: this audit revealed some potential bugs with the command context
implementation. There was a reason that commands were added at the
end of the list. Shallow copying of command_context means that
the list is shared between them. And commands added at the top-level
before the pre-existing commands will not be available in the shared
context as they were before. Yikes!
Fortunately, this does not seem to occur in general use, as
'add_help_text' gets registered in startup.tcl and claims the first slot
in my own test cases. Thus, it seems that we have been masking the issue
for now, but it shows the need for further architectural improvement in
the core command module.
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With the ability to defer 'init', users can access the help system while
still in CONFIG mode. This patch omits commands from the help and usage
list when they cannot be run in the current command mode, making it much
easier to see what can be done at a given time.
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Adds checks for memory allocation failures. Started to use calloc()
instead of malloc()/memset(), but I got carried away. This kind of work
should be done throughout the tree, but it's almost hopeless at present.
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Extends the help output to list the valid modes for each commands.
Fixes a memory leak of the returned command_name() string.
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Splits the check for a command's ability to run into a helper.
This also fixes a bug whereby commands that specified COMMAND_EXEC
were allowed to run during the configuration stage. This allowed
problematic commands to be called before 'init', defeating the intention
of specifying that command mode. With this change, the run_command()
helper denies access to handlers that should run only after 'init'
during the configuration stage.
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Presently, commands registration taks a static handler data pointer.
This patch adds support for commands that require a dynamic pointer,
such as those registered in a dynamic context (e.g. subcommands for a
user-created 'foo.cpu' command). The command_set_handler_data will
update a command (group) to use a new context pointer, while the
CMD_DATA macro allows command handlers to access the value.
Jim handlers should find this value in interp->cmdPrivData.
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Allows scripts to behave different depending on the current mode.
Also allows introspection of the mode required for commands.
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Updates command registration to provide top-level handlers for all
commands, rather than falling back onto the 'unknown' command. Instead,
that same handler is registered for placeholders, providing the same
functionality under the root verb command name instead. This permits
users to implement their own 'unknown' function, and it resolves some
mind-bending breakage related to function object lookup while recursing.
Changes 'ocd_bounce' to call 'ocd_command' and 'ocd_help' from the
wrapper directly, rather than bouncing through their wrappers. This
prevents endless recursion caused by the above changes, whereby the
'command' wrapper's type check would blow the stack to hell and gone.
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Adds 'ocd_bouncer' in startup.tcl that is called as a helper for
all command handlers, shrinking the embedded C wrapper to a mere stub.
Jim handlers are called directly, simple handlers get called with the
wrapper to capture and discard their output on error, and placeholders
call help directly (though the unknown handler still does this too).
It attempts to improve the quality of the error messages as well.
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Adds the 'command' group handler, with the 'type' command producing
a string that tells whether the given command is 'native' (for Jim-based
command handlers), 'simple' (for simple built-in commands), 'group'
for command group placeholders, and 'unknown' if not found in the
command registration tables (e.g. core built-ins functions).
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The command refactoring caused subcommand handlers to produce duplicate
output when run. The problem was introduced by failing to ensure all
such invocations went through a top-level "catcher" script, prefixing
the command name with the 'ocd_' prefix and consuming its results.
The fix is to ensure such a top-level "catcher" script gets created
for each top-level command, regardless of whether it has a handler.
Indeed, this patch removes all command registrations for sub-commands,
which would not have worked in the new registration scheme anyway.
For now, dispatch of subcommands continues to be handled by the new
'unknown' command handler, which gets fixed here to strip the 'ocd_'
prefix if searching for the top-level command name fails initially.
Some Jim commands may be registered with this prefix, and that situation
seems to require the current fallback approach. Otherwise, that prefix
could be stripped unconditionally and the logic made a little simpler.
The same problem must be handled by the 'help' command handler too,
so its lookup process works as intended.
Overall, the command dispatching remains more complicated than desired,
but this patch fixes the immediate regressions.
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Eliminates duplicated code in script_command and handle_unknown_command.
Fixes bug with duplicated help output generated by placeholder commands.
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Factors log capture while running script commands, eliminating
duplicated code between script_command and jim_capture. Factors
setting a command's Jim "retval" into a new helper as well.
Using these new helpers in the new unknown command handler's
fixes possible regressions caused by these bits being missing.
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Remove duplicated handler code by checking the running command name.
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Rewrite formatting code in C, removing last remenants of TCL help code.
Sinificantly improves the readability by using smarter indent and wrap.
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The add_usage_text command uses the same C handler, which was updated
to support its new polymorphic role. This patch updates the two script
commands that needed this support: 'find' and 'script'.
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Adding jim_handler field to command_registration allows removing the
register_jim helper. All command registrations now go through the
register_command{,s}() functions.
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Save stack space: use a struct. Makes it easier to add new parameters.
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Rewrite the magical 'unknown' command in C as a Jim handler, allowing
it to dispatch commands to any level in the tree.
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Allow other modules to find a command, primarily for the purpose of
registering and unregistering subcommands.
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Move command context acquisition to current_command_context() for re-use.
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Adds the ability to chain registration structures. Modules can define a
command with the 'chain' and 'num_chain' fields defined in their
registration table, and the register_commands() function will initialize
these commands. If the registration record creates a new command, then
the chained commands are created under it; otherwise, they are created
in the same context as the other commands (i.e. the parent argument).
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Split out the handler registration into its own function, and add a
few obviously missing NULL pointer error checking.
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Use register_commands() to register low-level command handlers,
adding a builtin_command_handlers declaration that is easy to understand.
Splits help and usage information into their appropriate fields.
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Adds the usage command, to display usage information for commands.
The output for this command will remain erronenously empty until
commands are updated to use these new coventions.
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The register_commands API takes multiple commands in one call, allowing
modules to declare and pass a much simpler (and more explicit) array of
command_registration records.
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Add a structure to encapsulate command registration information, rather
than passing them all as parameters. Enables further API changes that
require additional required or optional parameters.
Updates the register_command API and COMMAND_REGISTER macro to use it,
along with their documentation.
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Replaces direct calls to register_command() with a macro, to allow
its parameters to be changed and callers updated in phases.
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Use insertion sort to the command link lists. The only practical effect
of this is to order the output of the new 'help' command.
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Rewrite means for scripts to register help text for commands. These
cause the new commands to be stored in the command heirarchy, with
built-in commands; however, they will never be invoked there because
they do not receive a command handler. The same trick is used for
the Jim commands.
Remove the old helpers that were used to register commands.
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For the startup.tcl code to use built-in commands, the context must be
associated with the interpreter temporarily. This will be required to
add help text.
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Rewrites 'help' command in C, using new 'cmd_help' for display. Adds the
built-in 'help' COMMAND_HANDLER to provide better output than the
TCL-based script command (e.g. heirarchical listing of commands).
The help string is stored in the command structure, though it conitnues
to be pushed into the Jim environment. The current idiomatic usage
suggests the addition of a usage field as well, to provide two levels
of detail for users to consume (i.e. terse usage list, or verbose help).
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Refactors the command registration to use helpers to simplify the code.
The unregistration routines were made more flexible by allowing them
to operate on a single command, such that one can remove all of a
commands children in one step (perhaps before adding back a 'config'
subcommand that allows getting the others back). Eliminates a bit
of duplicated code and adds full API documentation for these routines.
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Avoid requiring double pointers where a single would suffice.
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Splits argument allocation out from script command, reusing free() code.
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