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shell: Prefix an FXF binary with * to not suspend the shell

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This commit is contained in:
Ry 2022-10-16 18:47:11 -07:00
parent 6de1a5f6df
commit cc40cce81b
2 changed files with 16 additions and 1 deletions
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3
kernel/shell/commands/help.asm
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@ -24,4 +24,7 @@ shell_help_text:
data.str "type the name of an FXF binary to launch" data.8 10
data.str "it as a new task; the shell will suspend" data.8 10
data.str "until the launched task ends" data.8 10
data.8 10
data.str "prefix the name of an FXF binary with *" data.8 10
data.str "to launch it without suspending" data.8 10
data.8 0

14
kernel/shell/launch.asm
View File

@ -2,7 +2,7 @@
; launch an FXF binary from a shell entry
; inputs:
; r0-r3: shell arguments
; r0: pointer to FXF binary name
; outputs:
; none, does not return if task started successfully
; returns if FXF file not found
@ -15,6 +15,14 @@ launch_fxf:
call copy_memory_bytes
pop r0
; if the name was prefixed with a '*' character then
; clear a flag to have the shell return control immediately
cmp.8 [r0], '*'
ifnz mov.8 [launch_fxf_yield_should_suspend], 1
ifnz jmp launch_fxf_no_prefix
inc r0
mov.8 [launch_fxf_yield_should_suspend], 0
launch_fxf_no_prefix:
; copy the name into the launch_fxf_name buffer
mov r1, launch_fxf_name
mov r31, 8
@ -86,6 +94,8 @@ launch_fxf_name_loop_done:
; loop until the launched task ends
launch_fxf_yield_loop:
cmp.8 [launch_fxf_yield_should_suspend], 0
ifz jmp shell_task_return
movz.8 r0, [launch_fxf_task_id]
call is_task_id_used
ifz jmp shell_task_return
@ -104,4 +114,6 @@ launch_fxf_task_id: data.8 0
launch_fxf_binary_ptr: data.32 0
launch_fxf_stack_ptr: data.32 0
launch_fxf_yield_should_suspend: data.8 0
out_of_memory_string: data.str "failed to allocate for new task!" data.8 10 data.8 0