kernel: Add launch_fxf_from_open_file
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@ -1,5 +1,33 @@
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; FXF launching routines
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; launch an FXF binary from an already opened file
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; inputs:
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; r0: pointer to file struct
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; r1: reserved
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; r2: argument 0
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; r3: argument 1
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; r4: argument 2
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; r5: argument 3
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; r6: argument 4
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; outputs:
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; r0: task ID of the new task, or 0xFFFFFFFF if error
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launch_fxf_from_open_file:
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push r1
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push r2
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push r3
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push r4
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push r5
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push r6
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push r2
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push r3
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push r4
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push r5
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push r6
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mov [launch_fxf_struct_ptr], r0
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jmp launch_fxf_from_open_file_1
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; launch an FXF binary from a file on disk
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; inputs:
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; r0: pointer to FXF binary name (8.3 format, for example "testfile.fxf" or "test.fxf")
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@ -26,13 +54,14 @@ launch_fxf_from_disk:
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push r6
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; open the file
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mov r2, launch_fxf_struct
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mov [launch_fxf_struct_ptr], launch_fxf_struct
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mov r2, [launch_fxf_struct_ptr]
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call open
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cmp r0, 0
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ifz jmp launch_fxf_from_disk_file_error
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launch_fxf_from_open_file_1:
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; allocate memory for the binary
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mov r0, launch_fxf_struct
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mov r0, [launch_fxf_struct_ptr]
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call get_size
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call allocate_memory
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cmp r0, 0
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@ -40,7 +69,7 @@ launch_fxf_from_disk:
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mov [launch_fxf_binary_ptr], r0
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; read the file into memory
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mov r0, launch_fxf_struct
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mov r0, [launch_fxf_struct_ptr]
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mov r1, [launch_fxf_binary_ptr]
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call ryfs_read_whole_file
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@ -109,6 +138,7 @@ launch_fxf_from_disk_file_error:
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mov r0, 0xFFFFFFFF
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ret
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launch_fxf_struct_ptr: data.32 0
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launch_fxf_struct: data.fill 0, 32
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launch_fxf_task_id: data.8 0
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launch_fxf_binary_ptr: data.32 0
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@ -28,6 +28,7 @@ jump_table:
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org.pad 0x00000110
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data.32 parse_fxf_binary
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data.32 launch_fxf_from_disk
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data.32 launch_fxf_from_open_file
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; task jump table
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org.pad 0x00000210
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@ -201,47 +202,25 @@ load_startup_task:
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mov r2, startup_file_struct
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call ryfs_open
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cmp r0, 0
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ifz jmp boot_disk_1
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ifz jmp startup_error
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; allocate memory for the startup file
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; create a new task and yield to it
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mov r0, startup_file_struct
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call get_size
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call allocate_memory
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cmp r0, 0
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ifz jmp memory_error
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mov [startup_file_binary_ptr], r0
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; allocate 64KiB for the startup file's stack
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mov r0, 65536
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call allocate_memory
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cmp r0, 0
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ifz jmp memory_error
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mov [startup_file_stack_ptr], r0
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; read the startup file into memory
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mov r0, startup_file_struct
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mov r1, [startup_file_binary_ptr]
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call ryfs_read_whole_file
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; relocate and execute it as a new task
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mov r0, r1
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call parse_fxf_binary
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mov r3, r1
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mov r1, r0
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movz.8 r0, [next_task_id]
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mov r2, [startup_file_stack_ptr]
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add r2, 65536
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sub r2, 4
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mov r4, [startup_file_stack_ptr]
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call new_task
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mov r1, 0
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mov r2, 0
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mov r3, 0
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mov r4, 0
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mov r5, 0
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mov r6, 0
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call launch_fxf_from_open_file
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; when the startup file yields for the first time, we'll end up back here
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; now, check to see if startup.cfg has any other entries
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; we do this by checking to see if the size of startup.cfg is less than or equal to 12 * next_task_id bytes
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inc.8 [next_task_id]
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; we do this by checking to see if the size of startup.cfg is less than or equal to 12 * next_task bytes
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inc.8 [next_task]
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mov r0, startup_cfg_struct
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call get_size
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movz.8 r1, [next_task_id]
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movz.8 r1, [next_task]
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mul r1, 12
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cmp r0, r1
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iflteq jmp no_other_tasks
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@ -306,7 +285,7 @@ boot_disk_1_loop:
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ifz jmp disk_1_is_not_fxf
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mov r3, r1
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mov r1, r0
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movz.8 r0, [next_task_id]
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movz.8 r0, 0
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mov r2, rsp
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sub r2, 4
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mov r4, 0 ; don't attempt to free any stack block if the task ends
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@ -434,7 +413,7 @@ bottom_bar_patterns:
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data.32 0xFFFFFFFF
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data.32 0xFF674764
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next_task_id: data.8 0
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next_task: data.8 0
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current_disk_id: data.8 0
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startup_cfg: data.str "startup cfg"
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startup_cfg_struct: data.32 0 data.32 0
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