kernel: Add create VFS syscall

fox32-arch · Mar 23, 2024 · c0b2ae2 · c0b2ae2
1 parent 6624b09
commit c0b2ae2
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diff --git a/fox32os.def b/fox32os.def
@@ -47,6 +47,7 @@ tell:                      jmp [0x00000D18]
 read:                      jmp [0x00000D1C]
 write:                     jmp [0x00000D20]
 get_size:                  jmp [0x00000D24]
+create:                    jmp [0x00000D28]
 
 ; widget jump table
 draw_widgets_to_window:    jmp [0x00000E10]

diff --git a/kernel/main.asm b/kernel/main.asm
@@ -72,6 +72,7 @@ jump_table:
     data.32 read
     data.32 write
     data.32 get_size
+    data.32 create
 
     ; widget jump table
     org.pad 0x00000610

diff --git a/kernel/vfs/vfs.asm b/kernel/vfs/vfs.asm
@@ -101,6 +101,20 @@ open_stream:
     mov r0, 0
     ret
 
+; create a file on a RYFS-formatted disk
+; inputs:
+; r0: pointer to file name string (8.3 format, for example "testfile.txt" or "test.txt")
+; r1: disk ID
+; r2: file struct: pointer to a blank file struct
+; r3: target file size
+; outputs:
+; r0: first file sector, or zero if file couldn't be created
+create:
+    call convert_filename
+    cmp r0, 0
+    ifz ret
+    jmp ryfs_create
+
 ; seek specified file to the specified offset
 ; inputs:
 ; r0: byte offset