(This function is called when the simulator is selected from the
gdb command line.)
- KIND specifies how the simulator will be used. Currently there are only
- two kinds: stand-alone and debug.
+ KIND specifies how the simulator shall be used. Currently there
+ are only two kinds: stand-alone and debug.
CALLBACK specifies a standard host callback (defined in callback.h).
ARGV is a standard ARGV pointer such as that passed from the
command line. The syntax of the argument list is is assumed to be
``SIM-PROG { SIM-OPTION } [ TARGET-PROGRAM { TARGET-OPTION } ]''.
+ The trailing TARGET-PROGRAM and args are only valid for a
+ stand-alone simulator.
On success, the result is a non NULL descriptor that shall be
passed to the other sim_foo functions. While the simulator
successful creation of the simulator shall not dependent on the
presence of any of these arguments/options.
- For a simulator modeling real hardware, the created simulator shall
- be sufficiently initialized to handle, with out restrictions any
- client requests (including memory reads/writes, register
- fetch/stores and a resume).
+ Hardware simulator: The created simulator shall be sufficiently
+ initialized to handle, with out restrictions any client requests
+ (including memory reads/writes, register fetch/stores and a
+ resume).
- For a simulator modeling a process, that process is not created
- until a call to sim_create_inferior. FIXME: What should the state
- of the simulator be? */
+ Process simulator: that process is not created until a call to
+ sim_create_inferior. FIXME: What should the state of the simulator
+ be? */
SIM_DESC sim_open PARAMS ((SIM_OPEN_KIND kind, struct host_callback_struct *callback, struct _bfd *abfd, char **argv));
If ABFD is non-NULL, the bfd for the file has already been opened.
The result is a return code indicating success.
- For a simulator modeling real hardware, the client is permitted to
- make multiple calls to this function. Such calls have an
- accumulative effect.
+ Hardware simulator: A call to this function should not effect the
+ state of the processor registers. Multiple calls to this function
+ are permitted and have an accumulative effect.
- For a simulator modeling a process, calls to this function may be
- ignored. */
+ Process simulator: Calls to this function may be ignored.
+
+ FIXME: Some hardware targets, before a loaded program can be
+ executed, require the manipulation of VM registers and tables.
+ Such manipulation should probably (?) occure in
+ sim_create_inferior. */
SIM_RC sim_load PARAMS ((SIM_DESC sd, char *prog, struct _bfd *abfd, int from_tty));
/* Prepare to run the simulated program.
- ARGV and ENV are NULL terminated lists of pointers.
-
- For a simulator modeling real hardware, this function shall
- initialize the processor registers to a known value. The program
- counter shall be set to the start address obtained from the last
- program loaded (or the hardware reset default). The ARGV and ENV
- arguments can be ignored.
-
- For a simulator modeling a process, after a call to this function a
- new process instance shall exist - the TEXT, DATA, BSS and stack
- regions shall all be initialized, ARGV and ENV shall be written to
- process address space (according to the applicable ABI), and the
- program counter and stack pointer set accordingly. (NB: A simulator
- may in fact initialize the TEXT, DATA and BSS sections during an
- earlier stage).
-
- --
-
- FIXME: Is the below a better definition - assuming that ABFD arg is
- added.
-
- Prepare to run the simulated program.
-
- ABFD, if not NULL, can be used to obtain initial processor state
- information (eg PC value).
- ARGV and ENV, if non NULL, are NULL terminated lists of pointers.
+ ABFD, if not NULL, provides initial processor state information.
+ ARGV and ENV, if non NULL, are NULL terminated lists of pointers.
- For a simulator modeling real hardware, this function shall
- initialize the processor registers to a known value. The program
- counter shall be set to the start address obtained from the ABFD
- struct (or the hardware reset default). The ARGV and ENV arguments
- can be ignored.
+ Hardware simulator: This function shall initialize the processor
+ registers to a known value. The program counter and possibly stack
+ pointer shall be set using information obtained from ABFD (or
+ hardware reset defaults). ARGV and ENV, dependant on the target
+ ABI, may be written to memory.
- For a simulator modeling a process, after a call to this function a
- new process instance shall exist - the TEXT, DATA, BSS and stack
- regions shall all be initialized, ARGV and ENV shall be written to
- process address space (according to the applicable ABI), and the
- program counter and stack pointer set accordingly. */
+ Process simulator: After a call to this function, a new process
+ instance shall exist. The TEXT, DATA, BSS and stack regions shall
+ all be initialized, ARGV and ENV shall be written to process
+ address space (according to the applicable ABI) and the program
+ counter and stack pointer set accordingly. */
-SIM_RC sim_create_inferior PARAMS ((SIM_DESC sd, char **argv, char **env));
+SIM_RC sim_create_inferior PARAMS ((SIM_DESC sd, struct _bfd *abfd, char **argv, char **env));
/* Read LENGTH bytes of the simulated program's memory and store in
projects / deliverable / binutils-gdb.git / blobdiff