diff options
| -rw-r--r-- | 103screen.subx | 2 | ||||
| -rw-r--r-- | 105files.subx | 58 | ||||
| -rwxr-xr-x | apps/mu | bin | 255962 -> 256130 bytes |
3 files changed, 59 insertions, 1 deletions
diff --git a/103screen.subx b/103screen.subx index 0273a43a..75753a1d 100644 --- a/103screen.subx +++ b/103screen.subx @@ -42,7 +42,7 @@ screen-size: # -> nrows/eax: int, ncols/ecx: int 50/push-eax 51/push-ecx 52/push-edx - 53/push-edx + 53/push-ebx 56/push-esi 57/push-edi # diff --git a/105files.subx b/105files.subx new file mode 100644 index 00000000..ae85b493 --- /dev/null +++ b/105files.subx @@ -0,0 +1,58 @@ +== code + +open: # filename: (addr array byte), write?: boolean, out: (addr handle buffered-file) + # hard-coded parameter: file-buffer-size of created buffered-file + # . prologue + 55/push-ebp + 89/<- %ebp 4/r32/esp + # . save registers + 50/push-eax + 51/push-ecx + 52/push-edx + 53/push-ebx + 56/push-esi + 57/push-edi + # ecx = filename + 8b/-> *(ebp+8) 1/r32/ecx + # var size/edx: int = filename->length + 1 for the trailing null character + 8b/-> *ecx 2/r32/edx + 42/increment-edx + # var s/esi: (stream size) + 29/subtract-from %esp 0/r32/eax + 50/push-eax # size + 68/push 0/imm32/read + 68/push 0/imm32/write + 89/<- %esi 4/r32/esp + # copy filename and a final null character + (clear-stream %esi) + (write %esi %ecx) + # var fd/ecx: fd = open(filename) + 8d/copy-address *(esi+0xc) 3/r32/ebx + 8b/-> *(ebp+0xc) 1/r32/ecx/flags + e8/call syscall_open/disp32 + 89/<- %ecx 0/r32/eax + # allocate a buffered-file + (allocate Heap 0x1010 *(ebp+0x10)) # file-buffer-size + 16 for other fields + # var out-addr/edi: (addr buffered-file) + 8b/-> *(ebp+0x10) 7/r32/edi + (lookup *edi *(edi+4)) # => eax + 89/<- %edi 0/r32/eax + # out-addr->size = 4KB + c7 0/subop/copy *(edi+0xc) 0x1000/imm32/file-buffer-size # Stream-size + 4 for fd + # out-addr->fd = fd + 89/<- *edi 1/r32/ecx +$open:end: + # . reclaim locals + 01/add-to %esp 2/r32/edx + 81 0/subop/add %esp 0xc/imm32 + # . restore registers + 5f/pop-to-edi + 5e/pop-to-esi + 5b/pop-to-ebx + 5a/pop-to-edx + 59/pop-to-ecx + 58/pop-to-eax + # . epilogue + 89/<- %esp 5/r32/ebp + 5d/pop-to-ebp + c3/return diff --git a/apps/mu b/apps/mu index 49eb1390..5158562c 100755 --- a/apps/mu +++ b/apps/mu Binary files differ |